CN114814443A - Multifunctional detection system for electric heating belt of heat preservation pipe - Google Patents

Multifunctional detection system for electric heating belt of heat preservation pipe Download PDF

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Publication number
CN114814443A
CN114814443A CN202210744658.8A CN202210744658A CN114814443A CN 114814443 A CN114814443 A CN 114814443A CN 202210744658 A CN202210744658 A CN 202210744658A CN 114814443 A CN114814443 A CN 114814443A
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China
Prior art keywords
pin
interface
power
operational amplifier
capacitor
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Pending
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CN202210744658.8A
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Chinese (zh)
Inventor
吴斌
马少平
古文庆
代翌斐
桑旭
杨斌
李薇
张琳霞
锡建彪
郑博
李凯
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Kunming 705 Science And Technology Development Co ltd
Shaanxi Zhongshi Intelligent Technology Co ltd
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Kunming 705 Science And Technology Development Co ltd
Shaanxi Zhongshi Intelligent Technology Co ltd
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Priority to CN202210744658.8A priority Critical patent/CN114814443A/en
Publication of CN114814443A publication Critical patent/CN114814443A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/0175—Coupling arrangements; Interface arrangements
    • H03K19/017509—Interface arrangements

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Power Engineering (AREA)
  • Tests Of Electronic Circuits (AREA)

Abstract

The invention discloses a multifunctional detection system for an electric heating belt of a heat preservation pipe, and belongs to the field of electric heating belt detection. The temperature measurement probe module is used for detecting the temperature of the electric heating belt; the control module is formed by additionally arranging a communication card and a data acquisition module on an upper computer, and a test unit for controlling the test module is arranged in the upper computer; the test module comprises an alternating current voltage regulator, a power test interface, a temperature test interface, a communication interface and a power socket with a filter, wherein the alternating current voltage regulator, the power test interface, the temperature test interface, the communication interface and the power socket are arranged on a test panel of the test box body; the power testing device also comprises a main control module, a power testing module and a power supply module which are arranged in the testing box body; the main control module consists of a main control board, a temperature signal conditioning and collecting module and a power signal conditioning module. The invention integrates the equipment required by the test items detected by the electric heating belt into the test module, and controls the test module to complete the test of each item through the upper computer, thereby improving the measurement efficiency.

Description

Multifunctional detection system for electric heating belt of heat preservation pipe
Technical Field
The invention belongs to the technical field of electric heating belt detection, and relates to a multifunctional detection system for an electric heating belt of a heat preservation pipe.
Background
The heat preservation pipe is mainly used for heat preservation engineering of heat medium, the electric heating belt is used as an important component in the heat preservation pipe, and heat of the heat medium cannot be lost in the heat preservation pipe through the heating function of the electric heating belt. After production is completed, in order to ensure that the thermal insulation pipe can normally work in a low-temperature environment, parameters of the electric heating belt in the thermal insulation pipe need to be detected, such as power detection and temperature detection of the electric heating belt.
At present, when the electric heating tape in the heat insulation pipe is detected, various devices are required to be used for testing item by item, and the field devices are arranged disorderly; the measuring efficiency is low, and the safety is not high enough.
Disclosure of Invention
The invention aims to provide a multifunctional detection system for an electric heating belt of a heat preservation pipe. The device integration that it needs the test item that the electric heating tape detected is test module, reduces the use amount of various test equipment, and accomplishes the test of each item through host computer control test module, improves measurement of efficiency.
The invention is realized by the following technical scheme:
a multifunctional detection system for an electric heating belt of a heat preservation pipe comprises a control module, a test module and a temperature measurement probe module, wherein the temperature measurement probe module is used for detecting the temperature of the electric heating belt;
the control module comprises an upper computer, a communication card and a data acquisition module, and a test unit for controlling the test module is arranged in the upper computer;
the testing module comprises an alternating current voltage regulator, a power testing interface, a temperature testing interface, a communication interface, a power socket with a filter and a fan for heat dissipation, wherein the alternating current voltage regulator, the power testing interface, the temperature testing interface, the communication interface and the power socket are arranged on a testing panel of the testing box body; the power testing device also comprises a main control module, a power testing module and a power supply module which are arranged in the testing box body;
the main control module consists of a main control board, a temperature signal conditioning and collecting module and a power signal conditioning module;
a power test instruction signal is sent to the main control module by the communication card through the communication interface, the main control module executes the power test instruction signal and further drives the power test module to test the power of the electric heating belt, the power signal measured by the power test module is conditioned by the power signal conditioning module and then is transmitted to the data acquisition card through the communication interface, and the data acquisition card sends the power signal to the test unit;
the temperature testing instruction signal is sent to the main control module through the communication interface by the communication card, the main control module executes the temperature testing instruction signal, the temperature signal conditioning and collecting module is further driven to test the temperature of the electric heating belt through the temperature measuring probe module, the temperature signal measured by the temperature signal conditioning and collecting module is conditioned by the temperature signal conditioning and collecting module and then is transmitted to the data acquisition card through the communication interface, and the data acquisition card sends the temperature signal to the testing unit.
Furthermore, the main control module also comprises a core board connected with the main control board through a board-board connector module, and a power distribution module used for supplying power to the main control board and the core board;
the power distribution module comprises a power interface circuit, a 5V voltage stabilizing circuit and a 3.3V power conversion circuit;
the PA13 pin of the core board is connected with the third pin of the download debugging interface P1; the PA14 pin of the core board is connected with the second pin of the download debugging interface P1; the RESET pin of the core board is connected with the fifth pin of the download debugging interface P1; a first pin of the download debugging interface P1 is grounded; and a fourth pin of the download debugging interface is connected with the 3.3V power supply conversion circuit.
Further, the board-to-board connector module includes a board-to-board connector M1 and a board-to-board connector M2; the 31 pin of the board-to-board connector M1 is grounded; pins 58, 59 and 60 of the board-to-board connector M2 are all connected with the power interface circuit; pin 1 and pin 30 of the board-to-board connector M2 are both grounded; a pin connector is connected between a BOOT0 pin and a BOOT1 pin of the board-to-board connector M2, a resistor R2 is connected between a BOOT0 pin of the board-to-board connector M2 and a third pin of the pin connector, a resistor R3 is connected between a BOOT1 pin of the board-to-board connector M2 and a fourth pin of the pin connector, and a first pin and a second pin of the pin connector are both connected with a 3.3V power conversion circuit; the fifth pin and the sixth pin of the pin connector are grounded; a RESET pin of the board-to-board connector M2 is connected with a first pin of the load connector J1, and a capacitor C1 is connected between a second pin of the load connector J1 and the RESET pin of the board-to-board connector M2; the first pin of the load connector J1 is also connected with a resistor R1, and the input end of the resistor R1 is connected with the 3.3V power conversion circuit.
Further, the power test module comprises a 220V power interface P2, and a live wire pin, a zero wire pin and a ground wire pin which are respectively marked as an L pin, an N pin and an E pin are arranged on the 220V power interface P2; a current transformer T1 and a current type voltage transformer T2 are connected in parallel between an L pin and an N pin of the 220V power interface P2; a load interface P3 is connected between an L pin of the 220V power interface P2 and the current transformer T1; a resistor R16 is connected IN parallel with two ends of the current transformer T1, a resistor R15, a capacitor C11, a capacitor C12 and a resistor R17 which are sequentially connected are also connected IN parallel with two ends of the resistor R16, and the capacitor C11 and the capacitor C12 are connected IN parallel between an IP pin and an IN pin of the power acquisition chip U2; the connection of the capacitor C11 and the capacitor C12 is terminated with a digital ground; a resistor R20 is connected between the current-mode voltage transformer T2 and the N pin of the 220V power interface P2, and a resistor R19 is connected in parallel to the current-mode voltage transformer T2; the resistor R19 is connected in parallel with a resistor R18 and a capacitor C13 which are sequentially connected, and the connecting end of the resistor R18 and the capacitor C13 is connected with a VP pin of a power acquisition chip U2; the connection of the resistor R19 and the capacitor C13 is terminated with digital ground;
a VDD pin of the power acquisition chip U2 is connected with a power interface circuit, a capacitor C10 is connected between the VDD pin of the power acquisition chip U2 and a GND pin, and the GND pin of the power acquisition chip U2 is connected with a digital ground; a PF pin of the power acquisition chip U2 is connected with a second pin of the power test interface J5, and a TX pin of the power acquisition chip U2 is connected with a first pin of the power test interface J5; the third pin of the power test interface J5 is connected to the power interface circuit.
Furthermore, the power signal conditioning module comprises a transceiver U12, a capacitor C22 and a capacitor C19 are sequentially connected between a V + pin and a V-pin of the transceiver U12, and an output end of the capacitor C22 is connected with the power interface circuit; the VCC pin of the transceiver U12 is connected with the + Vo pin of the power management chip U19, the VCC pin of the transceiver U12 is also connected with the input end of the capacitor C24, and the output end of the capacitor C24 is connected with the power interface circuit; a capacitor C20 is connected between the C1+ pin and the C1-pin of the transceiver U12; a capacitor C27 is connected between the C2+ pin and the C2-pin of the transceiver U12; the GND pin of the transceiver U12 is connected with the power interface circuit; a DOUT1 pin of the transceiver U12 is connected with a first pin of the host interface J4, an RIN1 pin of the transceiver U12 is connected with a second pin of the host interface J4, and a third pin of the host interface J4 is connected with the power interface circuit; a DOUT2 pin of the transceiver U12 is connected with a first pin of a power test interface J5, and an RIN2 pin of the transceiver U12 is connected with a second pin of a power test interface J5;
a DIN1 pin of the transceiver U12 is connected with a VOA pin of the digital isolator U13, and a ROUT1 pin of the transceiver U12 is connected with a VIC pin of the digital isolator U13; DIN2 pin of transceiver U12 is connected to VOB pin of digital isolator U13, ROUT2 pin of transceiver U12 is connected to VID pin of digital isolator U13; a capacitor C21 is connected between a VDD1 pin and a GND1 pin of the digital isolator U13, the output end of the capacitor C21 is grounded, and a VDD1 pin of the digital isolator U13 is connected with a 3.3V power supply conversion circuit; a capacitor C25 is connected between a VDD2 pin and a GND2 pin of the digital isolator U13, an output end of the capacitor C25 is connected with the power interface circuit, and a VDD2 pin of the digital isolator U13 is connected with a + Vo pin of the power management chip U19; the VIA pin of the digital isolator U13 is connected to the PA9 pin of the board-to-board connector M2, the VIB pin of the digital isolator U13 is connected to the PB10 pin of the board-to-board connector M1, the VOC pin of the digital isolator U13 is connected to the PA10 pin of the board-to-board connector M2, and the VOD pin of the digital isolator U13 is connected to the PB11 pin of the board-to-board connector M1.
Furthermore, the temperature signal conditioning and collecting module comprises a temperature signal conditioning and collecting circuit and a feedback circuit used for the voltage conversion circuit and the temperature signal conditioning and collecting circuit;
the temperature signal conditioning and collecting module comprises an input interface J1 and an input interface J2 which are connected with the temperature testing interface; the first pin and the fourth pin of the input interface J1 and the first pin and the fourth pin of the input interface J2 are connected with a feedback circuit; the fourth pin of the input interface J1 is also connected with a sliding resistor R5 connected with the analog ground; a resistor R7 is connected between the third pin of the input interface J1 and the-IN pin of the operational amplifier CF 1; a resistor R8 is connected between the second pin of the input interface J1 and the + IN pin of the operational amplifier CF 1; a capacitor C4 is connected between the-IN pin and the + IN pin of the operational amplifier CF1, a first contact of the capacitor C4 is connected with a capacitor C3 connected with the analog ground, and a second contact of the capacitor C4 is connected with a capacitor C5 connected with the analog ground; a sliding resistor R13 is connected between a-RG pin and a + RG pin of the operational amplifier CF 1; a resistor R17 and a resistor R23 are connected between the OUTPUT pin of the operational amplifier CF1 and the third contact of the double operational amplifier CF 2; a voltage stabilizing diode U7 is connected between the REF pin and the OUTPUT pin of the operational amplifier CF1, and a first contact of the voltage stabilizing diode is connected with a digital ground; a capacitor C12 and a capacitor C19 are connected between the-VS pin of the operational amplifier CF1 and the third contact of the dual operational amplifier CF2, and the capacitor C12 and the capacitor C19 are both connected with analog ground; the-VS pin of the operational amplifier CF1 is also connected with the voltage conversion circuit; the + VS pin of the operational amplifier CF1 is connected with a capacitor C11 connected with the analog ground, and the + VS pin of the operational amplifier CF1 is connected with the +5V pin of the power output-temperature interface J9; a first contact and a second contact of the dual operational amplifier CF2 are both connected with a first pin of the data acquisition interface J10 through a plug, and a capacitor C15 is connected between the connection end of the resistor R17 and the resistor R23 and the first pin of the data acquisition interface J10; the fifth contact of the double operational amplifier CF2 is connected with a capacitor C22 connected with the analog ground, and the fifth contact of the double operational amplifier CF2 is connected with a +5V pin of a power output-temperature interface J9; the fourth contact of the dual operational amplifier CF2 is connected with the analog ground;
the fourth pin of the input interface J2 is also connected with a sliding resistor R6 connected with the analog ground; a resistor R9 is connected between the third pin of the input interface J2 and the-IN pin of the operational amplifier CF 3; a resistor R10 is connected between the second pin of the input interface J2 and the + IN pin of the operational amplifier CF 3; a capacitor C7 is connected between the-IN pin and the + IN pin of the operational amplifier CF3, a first contact of the capacitor C7 is connected with a capacitor C6 connected with the analog ground, and a second contact of the capacitor C7 is connected with a capacitor C8 connected with the analog ground; a sliding resistor R14 is connected between a-RG pin and a + RG pin of the operational amplifier CF 3; a resistor R18 and a resistor R24 are connected between the OUTPUT pin of the operational amplifier CF3 and the third contact of the dual operational amplifier CF 4; a voltage regulator diode U8 is connected between the REF pin and the OUTPUT pin of the operational amplifier CF3, and a first contact of a voltage regulator diode U8 is connected with a digital ground; a capacitor C14 and a capacitor C20 are connected between the-VS pin of the operational amplifier CF3 and the third contact of the dual operational amplifier CF4, and the capacitor C14 and the capacitor C20 are both connected with analog ground; the-VS pin of the operational amplifier CF3 is also connected with the voltage conversion circuit; the + VS pin of the operational amplifier CF3 is connected with a capacitor C13 connected with the analog ground, and the + VS pin of the operational amplifier CF3 is connected with the +5V pin of the power output-temperature interface J9; the first contact and the second contact of the dual operational amplifier CF4 are both connected with the second pin of the data acquisition interface J10 through plugs, a capacitor C16 is connected between the connection end of the resistor R18 and the resistor R24 and the second pin of the data acquisition interface J10, and the third pin of the data acquisition interface J10 is grounded.
Further, the voltage conversion circuit includes a voltage converter U14 and a voltage converter U15; the V + pin of the voltage converter U14 is connected with the +5V pin of the power output-temperature interface J9; the +5V pin of the power output _ temperature interface J9 is formed by connecting a first pin, a third pin, a fifth pin and a seventh pin of the power output _ temperature interface J9, and a second pin, a fourth pin, a sixth pin and an eighth pin of the power output _ temperature interface J9 are all grounded; a capacitor C27 is connected between a CAP + pin and a CAP-pin of the voltage converter U14; an OUT pin of the voltage converter U14 is connected with a-VS pin of the dual operational amplifier CF1, and an LV pin and a GND pin of the voltage converter U14 are both connected with analog ground; the OUT pin of the voltage converter U14 is connected with a capacitor C28 connected with the analog ground, and the OUT pin of the voltage converter U14 outputs-5V voltage; the V + pin of the voltage converter U15 is connected with the +5V pin of the power output-temperature interface J9; a capacitor C29 is connected between a CAP + pin and a CAP-pin of the voltage converter U15; the LV pin and the GND pin of the voltage converter U15 are both connected with an analog ground; the OUT pin of the voltage converter U15 is connected with a capacitor C30 connected with an analog ground, the OUT pin of the voltage converter U15 is connected with the-VS pin of the dual operational amplifier CF3, and the OUT pin of the voltage converter U15 outputs a voltage of-5V.
Further, the feedback circuit comprises a 1mA1 feedback circuit, a 1mA2 feedback circuit, a 1mA3 feedback circuit and a 1mA4 feedback circuit; a first pin of the input interface J1 and a 1mA1 feedback circuit; the fourth pin of the input interface J1 is connected with the 1mA2 feedback circuit; a first pin of the input interface J2 is connected with a 1mA3 feedback circuit; the fourth pin of the input interface J2 is connected with the 1mA4 feedback circuit;
the 1mA1 feedback circuit comprises a voltage regulator U1, a second contact of the voltage regulator U1 is connected with a +5V pin of a power output-temperature interface J9, and a resistor R1 is connected between a first contact and a second contact of the voltage regulator U1; a resistor R2 is connected between a third contact and a first contact of the voltage regulator U1, and a third contact of the voltage regulator U1 is connected with an analog ground; a first contact of the voltage regulator source U1 is connected with an IN + pin of the operational amplifier CF 5; a resistor R15 is connected between an IN-pin of the operational amplifier CF5 and a second contact of the voltage regulator U1, an IN-pin of the operational amplifier CF5 is connected with a point E of the triode Q1, and an OUTPUT pin of the operational amplifier CF5 is connected with a point B of the triode Q1 through a resistor R11; the C point of the triode Q1 is connected with the first pin of the input interface J1; the V-pin of the operational amplifier CF5 is connected with a capacitor C1 connected with an analog ground, and the V-pin of the operational amplifier CF5 is also connected with the OUT pin of the voltage converter U14; the V + pin of the operational amplifier CF5 is connected with a capacitor C10 connected with analog ground, and the V + pin of the operational amplifier CF5 is connected with the +5V pin of a power output _ temperature interface J9;
the 1mA2 feedback circuit comprises a voltage regulator U2, a second contact of the voltage regulator U2 is connected with a +5V pin of a power output-temperature interface J9, and a resistor R3 is connected between a first contact and a second contact of the voltage regulator U2; a resistor R4 is connected between a third contact and the first contact of the voltage regulator U2, and the third contact of the voltage regulator U2 is connected with an analog ground; a first contact of the voltage regulator source U2 is connected with an IN + pin of the operational amplifier CF 6; a resistor R16 is connected between an IN-pin of the operational amplifier CF6 and a second contact of the voltage regulator U2, an IN-pin of the operational amplifier CF6 is connected with a point E of the triode Q1, and an OUTPUT pin of the operational amplifier CF6 is connected with a point B of the triode Q2 through a resistor R12; the C point of the triode Q2 is connected with the first pin of the input interface J1; the V-pin of the operational amplifier CF6 is connected with a capacitor C2 connected with an analog ground, and the V-pin of the operational amplifier CF6 is also connected with the OUT pin of the voltage converter U15; the V + pin of the operational amplifier CF5 is connected with a capacitor C9 connected with the analog ground, and the V + pin of the operational amplifier CF6 is connected with the +5V pin of a power output-temperature interface J9;
the 1mA3 feedback circuit comprises a voltage regulator U9, a second contact of the voltage regulator U9 is connected with a +5V pin of a power output-temperature interface J9, and a resistor R19 is connected between a first contact and a second contact of the voltage regulator U9; a resistor R20 is connected between a third contact and the first contact of the voltage regulator U9, and the third contact of the voltage regulator U9 is connected with an analog ground; a first contact of the voltage regulator source U9 is connected with an IN + pin of the operational amplifier CF 7; a resistor R27 is connected between an IN-pin of the operational amplifier CF7 and a second contact of the voltage regulator U9, an IN-pin of the operational amplifier CF7 is connected with a point E of the triode Q3, and an OUTPUT pin of the operational amplifier CF7 is connected with a point B of the triode Q3 through a resistor R25; the C point of the triode Q3 is connected with the first pin of the input interface J2; the V-pin of the operational amplifier CF7 is connected with a capacitor C17 connected with an analog ground, and the V-pin of the operational amplifier CF7 is also connected with the OUT pin of the voltage converter U15; the V + pin of the operational amplifier CF7 is connected with a capacitor C25 connected with the analog ground, and the V + pin of the operational amplifier CF7 is connected with the +5V pin of a power output-temperature interface J9;
the 1mA4 feedback circuit comprises a voltage regulator U10, a second contact of the voltage regulator U10 is connected with a +5V pin of a power output-temperature interface J9, and a resistor R21 is connected between a first contact and a second contact of the voltage regulator U10; a resistor R22 is connected between a third contact and the first contact of the voltage regulator U10, and the third contact of the voltage regulator U10 is connected with an analog ground; a first contact of the voltage regulator source U10 is connected with an IN + pin of the operational amplifier CF 8; a resistor R28 is connected between an IN-pin of the operational amplifier CF8 and a second contact of the voltage regulator U10, an IN-pin of the operational amplifier CF8 is connected with a point E of the triode Q4, and an OUTPUT pin of the operational amplifier CF8 is connected with a point B of the triode Q4 through a resistor R26; the C point of the triode Q4 is connected with the first pin of the input interface J2; the V-pin of the operational amplifier CF8 is connected with a capacitor C18 connected with an analog ground, and the V-pin of the operational amplifier CF8 is also connected with the OUT pin of the voltage converter U15; the V + pin of the operational amplifier CF8 is connected to the capacitor C24 connected to analog ground, and the V + pin of the operational amplifier CF8 is connected to the +5V pin of the power output _ temperature interface J9.
Furthermore, a fan control circuit for controlling the fan in the test module to work is further arranged on the main control board, and the fan control circuit comprises a transistor chip U16 and a transistor chip U17; the CAT pin of the transistor chip U16 is connected with the PD10 pin of the board-to-board connector M1; AN AN pin of the transistor chip U16 is connected with AN output end of the resistor R4, and AN input end of the resistor R4 is connected with the 3.3V power supply conversion circuit; the COL pin of the transistor chip U16 is connected with the first contact of the resistor R6 and the G contact of the field effect transistor Q1, and the second contact of the resistor R6 and the S contact of the field effect transistor Q1 are both connected with the power interface circuit; the D contact of the field effect transistor Q1 is connected with the second pin of the power output _ fan interface J7 through a plug, and the first pin of the power output _ fan interface J7 is connected with the power interface circuit; the EM pin of the transistor chip U16 is connected with the power interface circuit;
CAT pins of the transistor chip U17 are connected with PD14 pins of a board-to-board connector M1; AN AN pin of the transistor chip U17 is connected with AN output end of the resistor R5, and AN input end of the resistor R5 is connected with the 3.3V power supply conversion circuit; the COL pin of the transistor chip U17 is connected with the first contact of the resistor R7 and the G contact of the field effect transistor Q2, and the second contact of the resistor R7 and the S contact of the field effect transistor Q2 are both connected with the power interface circuit; the D contact of the field effect transistor Q2 is connected with the second pin of the power output _ fan interface J20 through a plug, and the first pin of the power output _ fan interface J20 is connected with the power interface circuit; the EM pin of the transistor chip U17 is connected to a power interface circuit.
Furthermore, the temperature measuring probe module is attached to the inner wall of the heat preservation pipe, and a plurality of temperature measuring sensors are arranged on the temperature measuring probe module; the temperature measuring sensor is a surface temperature measuring sensor.
Compared with the prior art, the invention has the following beneficial technical effects:
1. in the invention, equipment required by insulation resistance detection, direct current resistance detection, temperature detection and power detection in a test item detected by an electric heating belt is integrated into a test module, and during testing, a test unit in an upper computer is used for controlling a core board so that the core board drives a corresponding circuit to carry out power detection or temperature detection; the detection of the insulation resistance and the detection of the direct current resistance are carried out by connecting resistance testing interfaces of an insulation resistance tester and a micro resistance meter with an electric heating belt; because each equipment integration that is used for electric heating tape to detect has ensured when detecting electric heating tape on the test panel, can not lead to test field device to put in a jumble and also can not occupy too much space. The test efficiency of each test item of the electric heating belt is further improved.
2. The board-board connector circuit on the main control board is used for connecting the core board with the main control board, so that the core board can conveniently control each circuit on the main control board to realize a corresponding test function; the power distribution circuit on the main control board is used for converting the voltage input by the power supply module into the voltage required by each circuit to ensure that the main control board circuit supplies power; the power measuring module and the temperature testing module are used for measuring the power and the temperature of the electric heating belt; when the power of the electric heating belt is measured, a current type voltage transformer and a current transformer in the power measuring circuit respectively detect the voltage and the current in the electric heating belt, and the voltage and the current are conditioned through a power acquisition chip after the detection is finished; when measuring the temperature of the electric heating belt, the temperature measuring probe module attached to the heat preservation pipe is used for detecting the temperature of the electric heating belt, and the temperature measuring sensors on the temperature measuring probe module are in contact with each measured unit in the heat preservation pipe, so that the temperature measuring efficiency is conveniently and quickly measured and is improved.
Drawings
FIG. 1 is a schematic view of a detection system according to the present invention;
FIG. 2 is a schematic diagram of a test panel in a test module;
FIG. 3 is a circuit diagram of a core board;
FIG. 4 is a download debug interface of the core board;
FIG. 5 is a circuit diagram of a DC power interface;
FIG. 6 is a circuit diagram of a 3.3V power conversion circuit;
FIG. 7 is a circuit diagram of a 5V voltage regulator circuit;
fig. 8 is a circuit diagram of a board-to-board connector circuit;
fig. 9 is a circuit diagram of the load connector J1 circuit of the board-to-board connector;
fig. 10 is a circuit diagram of a pin connector circuit of the board-to-board connector;
FIG. 11 is a circuit diagram of a 220VAC power input interface;
FIG. 12 is a circuit diagram of a power test circuit;
FIG. 13 is a circuit diagram of a power test interface;
FIG. 14 is a circuit diagram of a serial port control and isolation circuit;
FIG. 15 is a circuit diagram of a voltage conversion circuit;
FIG. 16 is a circuit diagram of a temperature conditioning circuit;
FIG. 17 is a circuit diagram of a 1mA1 feedback circuit;
FIG. 18 is a circuit diagram of a 1mA2 feedback circuit;
FIG. 19 is a circuit diagram of a 1mA3 feedback circuit;
FIG. 20 is a circuit diagram of a 1mA4 feedback circuit;
FIG. 21 is a circuit diagram of a temperature interface;
FIG. 22 is a circuit diagram of a power supply output temperature interface;
FIG. 23 is a circuit diagram of a fan control circuit;
fig. 24 is a circuit diagram of the power out _ fan interface.
Wherein, 1 is the test box front panel, 2 is the ac voltage regulator, 3 is the supply socket of taking the wave filter, 4 is the communication interface, 5 is the power test interface, 6 is the temperature test interface, 7 is the fan.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which some embodiments of the invention are shown by way of illustration and not by way of limitation.
As shown in fig. 1 and 2, the invention discloses a multifunctional detection system for an electric heating belt of an insulating tube, which comprises a control module, a test module and a temperature probe module for detecting the temperature of the electric heating belt; the temperature measuring probe module is attached to the inner wall of the heat preservation pipe, and a plurality of temperature measuring sensors are arranged on the temperature measuring probe module; the temperature measuring sensor is OMEGA surface temperature measuring sensor SA 2C-RTD.
The control module comprises an upper computer, a communication card and a data acquisition module, and a test unit for controlling the test module is arranged in the upper computer;
the testing module comprises an alternating current voltage regulator 2, a power testing interface 5, a temperature testing interface 6, a communication interface 4, a power socket 3 with a filter and a fan 7 for heat dissipation, wherein the alternating current voltage regulator 2, the power testing interface 5, the temperature testing interface 6, the communication interface 4 and the power socket are arranged on a testing panel of the testing box body; the power testing device also comprises a main control module, a power testing module and a power supply module which are arranged in the testing box body;
the main control module consists of a main control board, a temperature signal conditioning and collecting module and a power signal conditioning module;
a power test instruction signal is sent to the main control module by the communication card through the communication interface 4 through the test unit in the upper computer, the main control module executes the power test instruction signal and further drives the power test module to test the power of the electric heating belt, the power signal measured by the power test module is conditioned by the power signal conditioning module and then is transmitted to the data acquisition card through the communication interface 4, and the data acquisition card sends the power signal to the test unit;
the temperature testing instruction signal is sent to the main control module through the communication card through the communication interface 4 through the testing unit in the upper computer, the main control module executes the temperature testing instruction signal, the temperature signal conditioning and collecting module is further driven to test the temperature of the electric heating belt through the temperature measuring probe module, the temperature signal measured by the temperature signal conditioning and collecting module is conditioned through the temperature signal conditioning and collecting module and then is transmitted to the data acquisition card through the communication interface 4, and the temperature signal is sent to the testing unit through the data acquisition card.
As shown in fig. 3, the main control module further includes a core board connected to the main control board through a board-to-board connector module, where the core board is STM32F429IGT6, and a power distribution module for supplying power to the main control board and the core board.
As shown in fig. 4, 5, 6 and 7, the power distribution module includes a power interface circuit, a 5V voltage regulator circuit and a 3.3V power conversion circuit; the power interface circuit, the 5V voltage stabilizing circuit and the 3.3V power conversion circuit all adopt the prior art.
As shown in fig. 3, the PA13 pin of the core board is connected to the third pin of the download debug interface P1; the PA14 pin of the core board is connected with the second pin of the download debugging interface P1; a RESET pin of the core board is connected with a fifth pin of a download debugging interface P1; a first pin of the download debugging interface P1 is grounded; and a fourth pin of the download debugging interface is connected with the 3.3V power supply conversion circuit.
As shown in fig. 8, the board-to-board connector module includes a board-to-board connector M1 and a board-to-board connector M2; the 31 pin of the board-to-board connector M1 is grounded; pins 58, 59 and 60 of the board-to-board connector M2 are all connected with the power interface circuit; pin 1 and pin 30 of the board-to-board connector M2 are both grounded; a pin connector is connected between a BOOT0 pin and a BOOT1 pin of the board-to-board connector M2, a resistor R2 is connected between a BOOT0 pin of the board-to-board connector M2 and a third pin of the pin connector, as shown in fig. 10, a resistor R3 is connected between a BOOT1 pin of the board-to-board connector M2 and a fourth pin of the pin connector, and a first pin and a second pin of the pin connector are both connected with a 3.3V power conversion circuit; the fifth pin and the sixth pin of the pin connector are grounded; as shown in fig. 9, the RESET pin of the board-to-board connector M2 is connected to the first pin of the load connector J1, and a capacitor C1 is connected between the second pin of the load connector J1 and the RESET pin of the board-to-board connector M2; the first pin of the load connector J1 is also connected with a resistor R1, and the input end of the resistor R1 is connected with the 3.3V power conversion circuit.
As shown in fig. 11, the power testing module includes a 220V power interface P2, and a live wire pin, a neutral wire pin, and a ground wire pin, which are respectively marked as an L pin, an N pin, and an E pin, are disposed on the 220V power interface P2; as shown in fig. 12, a current transformer T1 and a current-mode voltage transformer T2 are connected in parallel between the L pin and the N pin of the 220V power interface P2; a load interface P3 is connected between an L pin of the 220V power interface P2 and the current transformer T1; a resistor R16 is connected IN parallel with two ends of the current transformer T1, a resistor R15, a capacitor C11, a capacitor C12 and a resistor R17 which are sequentially connected are also connected IN parallel with two ends of the resistor R16, and the capacitor C11 and the capacitor C12 are connected IN parallel between an IP pin and an IN pin of the power acquisition chip U2; the connection of the capacitor C11 and the capacitor C12 is terminated with a digital ground; a resistor R20 is connected between the current-mode voltage transformer T2 and the N pin of the 220V power interface P2, and a resistor R19 is connected in parallel to the current-mode voltage transformer T2; the resistor R19 is connected in parallel with a resistor R18 and a capacitor C13 which are connected in sequence, and the connecting end of the resistor R18 and the capacitor C13 is connected with a VP pin of the power acquisition chip U2; the connection of the resistor R19 and the capacitor C13 is terminated with digital ground;
as shown in fig. 12 and 13, the VDD pin of the power acquisition chip U2 is connected to the power interface circuit, the power acquisition chip has a model of HLW8032, a capacitor C10 is connected between the VDD pin and the GND pin of the power acquisition chip U2, and the GND pin of the power acquisition chip U2 is connected to digital ground; a PF pin of the power acquisition chip U2 is connected with a second pin of the power test interface J5, and a TX pin of the power acquisition chip U2 is connected with a first pin of the power test interface J5; the third pin of the power test interface J5 is connected to the power interface circuit.
As shown in fig. 14, the power signal conditioning module includes a transceiver U12, the transceiver U12 is MAX3232, a capacitor C22 and a capacitor C19 are sequentially connected between a V + pin and a V-pin of the transceiver U12, and an output terminal of the capacitor C22 is connected to the power interface circuit; the VCC pin of the transceiver U12 is connected with the + Vo pin of the power management chip U19, the VCC pin of the transceiver U12 is also connected with the input end of the capacitor C24, and the output end of the capacitor C24 is connected with the power interface circuit; a capacitor C20 is connected between the C1+ pin and the C1-pin of the transceiver U12; a capacitor C27 is connected between the C2+ pin and the C2-pin of the transceiver U12; the GND pin of the transceiver U12 is connected with the power interface circuit; a DOUT1 pin of the transceiver U12 is connected with a first pin of the host interface J4, an RIN1 pin of the transceiver U12 is connected with a second pin of the host interface J4, and a third pin of the host interface J4 is connected with the power interface circuit; a DOUT2 pin of the transceiver U12 is connected with a first pin of a power test interface J5, and an RIN2 pin of the transceiver U12 is connected with a second pin of a power test interface J5;
a DIN1 pin of the transceiver U12 is connected with a VOA pin of the digital isolator U13, and a ROUT1 pin of the transceiver U12 is connected with a VIC pin of the digital isolator U13; transceiver U12 model MAX 3232; DIN2 pin of transceiver U12 is connected to VOB pin of digital isolator U13, ROUT2 pin of transceiver U12 is connected to VID pin of digital isolator U13; a capacitor C21 is connected between a VDD1 pin and a GND1 pin of the digital isolator U13, the output end of the capacitor C21 is grounded, and a VDD1 pin of the digital isolator U13 is connected with a 3.3V power supply conversion circuit; a capacitor C25 is connected between a VDD2 pin and a GND2 pin of the digital isolator U13, an output end of the capacitor C25 is connected with the power interface circuit, and a VDD2 pin of the digital isolator U13 is connected with a + Vo pin of the power management chip U19; the VIA pin of the digital isolator U13 is connected to the PA9 pin of the board-to-board connector M2, the VIB pin of the digital isolator U13 is connected to the PB10 pin of the board-to-board connector M1, the VOC pin of the digital isolator U13 is connected to the PA10 pin of the board-to-board connector M2, and the VOD pin of the digital isolator U13 is connected to the PB11 pin of the board-to-board connector M1.
As shown in fig. 16, the temperature signal conditioning and collecting module includes a temperature signal conditioning and collecting circuit and a feedback circuit for the voltage converting circuit and the temperature signal conditioning and collecting circuit;
the temperature signal conditioning and collecting module comprises an input interface J1 and an input interface J2 which are connected with the temperature testing interface 6; the first pin and the fourth pin of the input interface J1 and the first pin and the fourth pin of the input interface J2 are connected with a feedback circuit; the fourth pin of the input interface J1 is also connected with a sliding resistor R5 connected with the analog ground; a resistor R7 is connected between the third pin of the input interface J1 and the-IN pin of the operational amplifier CF 1; a resistor R8 is connected between the second pin of the input interface J1 and the + IN pin of the operational amplifier CF 1; a capacitor C4 is connected between the-IN pin and the + IN pin of the operational amplifier CF1, a first contact of the capacitor C4 is connected with a capacitor C3 connected with the analog ground, and a second contact of the capacitor C4 is connected with a capacitor C5 connected with the analog ground; a sliding resistor R13 is connected between a-RG pin and a + RG pin of the operational amplifier CF 1; a resistor R17 and a resistor R23 are connected between the OUTPUT pin of the operational amplifier CF1 and the third contact of the double operational amplifier CF 2; a voltage stabilizing diode U7 is connected between the REF pin and the OUTPUT pin of the operational amplifier CF1, and a first contact of the voltage stabilizing diode is connected with a digital ground; a capacitor C12 and a capacitor C19 are connected between the-VS pin of the operational amplifier CF1 and the third contact of the dual operational amplifier CF2, and the capacitor C12 and the capacitor C19 are both connected with analog ground; the-VS pin of the operational amplifier CF1 is also connected with the voltage conversion circuit; the + VS pin of the operational amplifier CF1 is connected with a capacitor C11 connected with the analog ground, and the + VS pin of the operational amplifier CF1 is connected with the +5V pin of the power output-temperature interface J9; as shown in fig. 21, the first contact and the second contact of the dual operational amplifier CF2 are both connected to the first pin of the data acquisition interface J10 through plugs, and a capacitor C15 is connected between the connection end of the resistor R17 and the resistor R23 and the first pin of the data acquisition interface J10; the fifth contact of the double operational amplifier CF2 is connected with a capacitor C22 connected with the analog ground, and the fifth contact of the double operational amplifier CF2 is connected with a +5V pin of a power output-temperature interface J9; the fourth contact of the dual operational amplifier CF2 is connected with the analog ground;
the fourth pin of the input interface J2 is also connected with a sliding resistor R6 connected with the analog ground; a resistor R9 is connected between the third pin of the input interface J2 and the-IN pin of the operational amplifier CF 3; a resistor R10 is connected between the second pin of the input interface J2 and the + IN pin of the operational amplifier CF 3; a capacitor C7 is connected between the-IN pin and the + IN pin of the operational amplifier CF3, a first contact of the capacitor C7 is connected with a capacitor C6 connected with the analog ground, and a second contact of the capacitor C7 is connected with a capacitor C8 connected with the analog ground; a sliding resistor R14 is connected between a-RG pin and a + RG pin of the operational amplifier CF 3; a resistor R18 and a resistor R24 are connected between the OUTPUT pin of the operational amplifier CF3 and the third contact of the dual operational amplifier CF 4; a voltage regulator diode U8 is connected between the REF pin and the OUTPUT pin of the operational amplifier CF3, and a first contact of a voltage regulator diode U8 is connected with a digital ground; a capacitor C14 and a capacitor C20 are connected between the-VS pin of the operational amplifier CF3 and the third contact of the dual operational amplifier CF4, and the capacitor C14 and the capacitor C20 are both connected with analog ground; the-VS pin of the operational amplifier CF3 is also connected with the voltage conversion circuit; the + VS pin of the operational amplifier CF3 is connected with a capacitor C13 connected with the analog ground, and the + VS pin of the operational amplifier CF3 is connected with the +5V pin of the power output-temperature interface J9; as shown in fig. 21, the first contact and the second contact of the dual operational amplifier CF4 are both connected to the second pin of the data acquisition interface J10 through plugs, a capacitor C16 is connected between the connection end of the resistor R18 and the resistor R24 and the second pin of the data acquisition interface J10, and the third pin of the data acquisition interface J10 is grounded.
As shown in fig. 15, the voltage conversion circuit includes a voltage converter U14 and a voltage converter U15, the models of the voltage converter U14 and the voltage converter U15 are both LM2662, and a V + pin of the voltage converter U14 is connected to a +5V pin of a power output _ temperature interface J9; the +5V pin of the power output _ temperature interface J9 is formed by connecting a first pin, a third pin, a fifth pin and a seventh pin of the power output _ temperature interface J9, and a second pin, a fourth pin, a sixth pin and an eighth pin of the power output _ temperature interface J9 are all grounded; a capacitor C27 is connected between a CAP + pin and a CAP-pin of the voltage converter U14; an OUT pin of the voltage converter U14 is connected with a-VS pin of the dual operational amplifier CF1, and an LV pin and a GND pin of the voltage converter U14 are both connected with analog ground; the OUT pin of the voltage converter U14 is connected with a capacitor C28 connected with the analog ground, and the OUT pin of the voltage converter U14 outputs-5V voltage; the V + pin of the voltage converter U15 is connected with the +5V pin of the power output-temperature interface J9; a capacitor C29 is connected between a CAP + pin and a CAP-pin of the voltage converter U15; the LV pin and the GND pin of the voltage converter U15 are both connected with an analog ground; the OUT pin of the voltage converter U15 is connected with a capacitor C30 connected with an analog ground, the OUT pin of the voltage converter U15 is connected with the-VS pin of the dual operational amplifier CF3, and the OUT pin of the voltage converter U15 outputs a voltage of-5V.
As shown in fig. 16, the feedback circuit includes a 1mA1 feedback circuit, a 1mA2 feedback circuit, a 1mA3 feedback circuit, and a 1mA4 feedback circuit; a first pin of the input interface J1 and a 1mA1 feedback circuit; the fourth pin of the input interface J1 is connected with the 1mA2 feedback circuit; a first pin of the input interface J2 is connected with a 1mA3 feedback circuit; the fourth pin of the input interface J2 is connected with the 1mA4 feedback circuit;
as shown in fig. 17, the 1mA1 feedback circuit includes a regulator U1, the regulator U1 is of model TL431, as shown in fig. 22, a second contact of the regulator U1 is connected to the +5V pin of the power output _ temperature interface J9, and a resistor R1 is connected between a first contact and a second contact of the regulator U1; a resistor R2 is connected between a third contact and the first contact of the voltage regulator U1, and the third contact of the voltage regulator U1 is connected with an analog ground; a first contact of the voltage regulator source U1 is connected with an IN + pin of the operational amplifier CF 5; a resistor R15 is connected between an IN-pin of the operational amplifier CF5 and a second contact of the voltage-stabilizing source U1, the model of the operational amplifier CF5 is CA3140AM/TR, the IN-pin of the operational amplifier CF5 is connected with the E point of the triode Q1, and the OUTPUT pin of the operational amplifier CF5 is connected with the B point of the triode Q1 through a resistor R11; the C point of the triode Q1 is connected with the first pin of the input interface J1; the V-pin of the operational amplifier CF5 is connected with a capacitor C1 connected with an analog ground, and the V-pin of the operational amplifier CF5 is also connected with the OUT pin of the voltage converter U14; the V + pin of the operational amplifier CF5 is connected with a capacitor C10 connected with the analog ground, and the V + pin of the operational amplifier CF5 is connected with the +5V pin of a power output-temperature interface J9;
as shown in fig. 18, the 1mA2 feedback circuit includes a regulator U2, the regulator U2 is of model TL431, as shown in fig. 22, a second contact of the regulator U2 is connected to the +5V pin of the power output _ temperature interface J9, and a resistor R3 is connected between a first contact and a second contact of the regulator U2; a resistor R4 is connected between a third contact and the first contact of the voltage regulator U2, and the third contact of the voltage regulator U2 is connected with an analog ground; a first contact of the voltage regulator source U2 is connected with an IN + pin of the operational amplifier CF 6; the model of the operational amplifier CF6 is CA3140AM/TR, a resistor R16 is connected between an IN-pin of the operational amplifier CF6 and a second contact of a voltage regulator U2, an IN-pin of the operational amplifier CF6 is connected with a point E of a triode Q1, and an OUTPUT pin of the operational amplifier CF6 is connected with a point B of the triode Q2 through a resistor R12; the C point of the triode Q2 is connected with the first pin of the input interface J1; the V-pin of the operational amplifier CF6 is connected with a capacitor C2 connected with an analog ground, and the V-pin of the operational amplifier CF6 is also connected with the OUT pin of the voltage converter U15; the V + pin of the operational amplifier CF5 is connected with a capacitor C9 connected with analog ground, and the V + pin of the operational amplifier CF6 is connected with the +5V pin of a power output _ temperature interface J9;
as shown in fig. 19, the 1mA3 feedback circuit includes a regulator U9, the regulator U9 is model TL431, as shown in fig. 22, a second contact of the regulator U9 is connected to the +5V pin of the power output _ temperature interface J9, and a resistor R19 is connected between the first contact and the second contact of the regulator U9; a resistor R20 is connected between a third contact and the first contact of the voltage regulator U9, and the third contact of the voltage regulator U9 is connected with an analog ground; a first contact of the voltage regulator source U9 is connected with an IN + pin of the operational amplifier CF 7; the model of the operational amplifier CF7 is CA3140AM/TR, a resistor R27 is connected between an IN-pin of the operational amplifier CF7 and a second contact of a voltage regulator U9, an IN-pin of the operational amplifier CF7 is connected with a point E of a triode Q3, and an OUTPUT pin of the operational amplifier CF7 is connected with a point B of the triode Q3 through a resistor R25; the C point of the triode Q3 is connected with the first pin of the input interface J2; the V-pin of the operational amplifier CF7 is connected with a capacitor C17 connected with an analog ground, and the V-pin of the operational amplifier CF7 is also connected with the OUT pin of the voltage converter U15; the V + pin of the operational amplifier CF7 is connected with a capacitor C25 connected with the analog ground, and the V + pin of the operational amplifier CF7 is connected with the +5V pin of a power output-temperature interface J9;
as shown in fig. 20, the 1mA4 feedback circuit includes a regulator U10, the regulator U10 is of model TL431, as shown in fig. 22, a second contact of the regulator U10 is connected to the +5V pin of the power output _ temperature interface J9, and a resistor R21 is connected between a first contact and a second contact of the regulator U10; a resistor R22 is connected between a third contact and the first contact of the voltage regulator U10, and the third contact of the voltage regulator U10 is connected with an analog ground; a first contact of the voltage regulator source U10 is connected with an IN + pin of the operational amplifier CF 8; the model of the operational amplifier CF8 is CA3140AM/TR, a resistor R28 is connected between an IN-pin of the operational amplifier CF8 and a second contact of a voltage regulator U10, an IN-pin of the operational amplifier CF8 is connected with a point E of a triode Q4, and an OUTPUT pin of the operational amplifier CF8 is connected with a point B of the triode Q4 through a resistor R26; the C point of the triode Q4 is connected with the first pin of the input interface J2; the V-pin of the operational amplifier CF8 is connected with a capacitor C18 connected with an analog ground, and the V-pin of the operational amplifier CF8 is also connected with the OUT pin of the voltage converter U15; the V + pin of the operational amplifier CF8 is connected to the capacitor C24 connected to analog ground, and the V + pin of the operational amplifier CF8 is connected to the +5V pin of the power output _ temperature interface J9.
As shown in fig. 23, a fan control circuit for controlling the fan 7 in the test module to operate is further disposed on the main control board, the fan 7 control circuit includes a transistor chip U16 and a transistor chip U17, and the models of the transistor chip U16 and the transistor chip U17 are TLP 127; the CAT pin of the transistor chip U16 is connected with the PD10 pin of the board-to-board connector M1; AN AN pin of the transistor chip U16 is connected with AN output end of the resistor R4, and AN input end of the resistor R4 is connected with the 3.3V power supply conversion circuit; the COL pin of the transistor chip U16 is connected with the first contact of the resistor R6 and the G contact of the field effect transistor Q1, and the second contact of the resistor R6 and the S contact of the field effect transistor Q1 are both connected with the power interface circuit; as shown in fig. 24, the D contact of the field effect transistor Q1 is connected to the second pin of the power output _ fan interface J7 via a plug, and the first pin of the power output _ fan interface J7 is connected to the power interface circuit; the EM pin of the transistor chip U16 is connected with the power interface circuit;
the CAT pin of the transistor chip U17 is connected with the PD14 pin of the board-to-board connector M1; AN AN pin of the transistor chip U17 is connected with AN output end of the resistor R5, and AN input end of the resistor R5 is connected with the 3.3V power supply conversion circuit; the COL pin of the transistor chip U17 is connected with the first contact of the resistor R7 and the G contact of the field effect transistor Q2, and the second contact of the resistor R7 and the S contact of the field effect transistor Q2 are both connected with the power interface circuit; as shown in fig. 24, the D contact of the field effect transistor Q2 is connected to the second pin of the power output _ fan interface J20 via a plug, and the first pin of the power output _ fan interface J20 is connected to the power interface circuit; the EM pin of transistor chip U17 is connected to a power interface circuit.
The embodiments given above are preferable examples for implementing the present invention, and the present invention is not limited to the above-described embodiments. Any non-essential addition and replacement made by the technical characteristics of the technical scheme of the invention by a person skilled in the art belong to the protection scope of the invention.

Claims (10)

1. A multifunctional detection system for an electric heating belt of a heat preservation pipe is characterized by comprising a control module, a test module and a temperature measuring probe module for detecting the temperature of the electric heating belt;
the control module comprises an upper computer, a communication card and a data acquisition module, and a test unit for controlling the test module is arranged in the upper computer;
the testing module comprises an alternating current voltage regulator (2), a power testing interface (5), a temperature testing interface (6), a communication interface (4), a power socket (3) with a filter and a fan (7) for heat dissipation, wherein the alternating current voltage regulator, the power testing interface (5), the temperature testing interface and the power socket are arranged on a testing panel of the testing box body; the power testing device also comprises a main control module, a power testing module and a power supply module which are arranged in the testing box body;
the main control module consists of a main control board, a temperature signal conditioning and collecting module and a power signal conditioning module;
a power test instruction signal is sent to the main control module by the communication card through the communication interface (4), the main control module executes the power test instruction signal, the power test module is further driven to test the power of the electric heating belt, the power signal measured by the power test module is conditioned by the power signal conditioning module and then is transmitted to the data acquisition card through the communication interface (4), and the data acquisition card sends the power signal to the test unit;
the temperature testing instruction signal is sent to the main control module through the communication interface (4) by the communication card, the main control module executes the temperature testing instruction signal, the temperature signal conditioning and collecting module is further driven to test the temperature of the electric heating belt through the temperature measuring probe module, the temperature signal measured by the temperature signal conditioning and collecting module is conditioned by the temperature signal conditioning and collecting module and then transmitted to the data acquisition card through the communication interface (4), and the temperature signal is sent to the testing unit through the data acquisition card.
2. The multifunctional detection system for the electrical heating belt of the heat preservation pipe as claimed in claim 1, wherein the main control module further comprises a core board connected with the main control board through a board-to-board connector module, and a power distribution module for supplying power to the main control board and the core board;
the power distribution module comprises a power interface circuit, a 5V voltage stabilizing circuit and a 3.3V power conversion circuit;
the PA13 pin of the core board is connected with the third pin of the download debugging interface P1; the PA14 pin of the core board is connected with the second pin of the download debugging interface P1; the RESET pin of the core board is connected with the fifth pin of the download debugging interface P1; a first pin of the download debugging interface P1 is grounded; and a fourth pin of the download debugging interface is connected with the 3.3V power supply conversion circuit.
3. The multifunctional inspection system for the electrical heating belt of heat-insulating pipe as claimed in claim 2, wherein the board-to-board connector module comprises a board-to-board connector M1 and a board-to-board connector M2; the 31 pin of the board-to-board connector M1 is grounded; pins 58, 59 and 60 of the board-to-board connector M2 are all connected with the power interface circuit; pin 1 and pin 30 of the board-to-board connector M2 are both grounded; a pin connector is connected between a BOOT0 pin and a BOOT1 pin of the board-to-board connector M2, a resistor R2 is connected between a BOOT0 pin of the board-to-board connector M2 and a third pin of the pin connector, a resistor R3 is connected between a BOOT1 pin of the board-to-board connector M2 and a fourth pin of the pin connector, and a first pin and a second pin of the pin connector are both connected with a 3.3V power conversion circuit; the fifth pin and the sixth pin of the pin connector are grounded; a RESET pin of the board-to-board connector M2 is connected with a first pin of the load connector J1, and a capacitor C1 is connected between a second pin of the load connector J1 and the RESET pin of the board-to-board connector M2; the first pin of the load connector J1 is also connected with a resistor R1, and the input end of the resistor R1 is connected with the 3.3V power conversion circuit.
4. The multifunctional detection system for the electric heating belt of the heat preservation pipe as claimed in claim 1, wherein the power test module comprises a 220V power interface P2, and a live pin, a neutral pin and a ground pin respectively marked as an L pin, an N pin and an E pin are arranged on the 220V power interface P2; a current transformer T1 and a current type voltage transformer T2 are connected in parallel between an L pin and an N pin of the 220V power interface P2; a load interface P3 is connected between an L pin of the 220V power interface P2 and the current transformer T1; a resistor R16 is connected IN parallel with two ends of the current transformer T1, a resistor R15, a capacitor C11, a capacitor C12 and a resistor R17 which are sequentially connected are also connected IN parallel with two ends of the resistor R16, and the capacitor C11 and the capacitor C12 are connected IN parallel between an IP pin and an IN pin of the power acquisition chip U2; the connection of the capacitor C11 and the capacitor C12 is terminated with a digital ground; a resistor R20 is connected between the current-mode voltage transformer T2 and the N pin of the 220V power interface P2, and a resistor R19 is connected in parallel to the current-mode voltage transformer T2; the resistor R19 is connected in parallel with a resistor R18 and a capacitor C13 which are connected in sequence, and the connecting end of the resistor R18 and the capacitor C13 is connected with a VP pin of the power acquisition chip U2; the connection of the resistor R19 and the capacitor C13 is terminated with digital ground;
a VDD pin of the power acquisition chip U2 is connected with a power interface circuit, a capacitor C10 is connected between the VDD pin of the power acquisition chip U2 and a GND pin, and the GND pin of the power acquisition chip U2 is connected with a digital ground; a PF pin of the power acquisition chip U2 is connected with a second pin of the power test interface J5, and a TX pin of the power acquisition chip U2 is connected with a first pin of the power test interface J5; the third pin of the power test interface J5 is connected to the power interface circuit.
5. The multifunctional detection system for the electric heating belt of the heat preservation pipe as claimed in claim 4, wherein the power signal conditioning module comprises a transceiver U12, a capacitor C22 and a capacitor C19 are sequentially connected between a V + pin and a V-pin of the transceiver U12, and an output end of the capacitor C22 is connected with the power interface circuit; the VCC pin of the transceiver U12 is connected with the + Vo pin of the power management chip U19, the VCC pin of the transceiver U12 is also connected with the input end of the capacitor C24, and the output end of the capacitor C24 is connected with the power interface circuit; a capacitor C20 is connected between the C1+ pin and the C1-pin of the transceiver U12; a capacitor C27 is connected between the C2+ pin and the C2-pin of the transceiver U12; the GND pin of the transceiver U12 is connected with the power interface circuit; a DOUT1 pin of the transceiver U12 is connected with a first pin of the host interface J4, an RIN1 pin of the transceiver U12 is connected with a second pin of the host interface J4, and a third pin of the host interface J4 is connected with the power interface circuit; a DOUT2 pin of the transceiver U12 is connected with a first pin of a power test interface J5, and an RIN2 pin of the transceiver U12 is connected with a second pin of a power test interface J5;
a DIN1 pin of the transceiver U12 is connected with a VOA pin of the digital isolator U13, and a ROUT1 pin of the transceiver U12 is connected with a VIC pin of the digital isolator U13; DIN2 pin of transceiver U12 is connected to VOB pin of digital isolator U13, ROUT2 pin of transceiver U12 is connected to VID pin of digital isolator U13; a capacitor C21 is connected between a VDD1 pin and a GND1 pin of the digital isolator U13, the output end of the capacitor C21 is grounded, and a VDD1 pin of the digital isolator U13 is connected with a 3.3V power supply conversion circuit; a capacitor C25 is connected between a VDD2 pin and a GND2 pin of the digital isolator U13, an output end of the capacitor C25 is connected with the power interface circuit, and a VDD2 pin of the digital isolator U13 is connected with a + Vo pin of the power management chip U19; the VIA pin of the digital isolator U13 is connected to the PA9 pin of the board-to-board connector M2, the VIB pin of the digital isolator U13 is connected to the PB10 pin of the board-to-board connector M1, the VOC pin of the digital isolator U13 is connected to the PA10 pin of the board-to-board connector M2, and the VOD pin of the digital isolator U13 is connected to the PB11 pin of the board-to-board connector M1.
6. The multifunctional detection system for the electric heating belt of the heat preservation pipe as claimed in claim 1, wherein the temperature signal conditioning and collecting module comprises a temperature signal conditioning and collecting circuit and a feedback circuit for the voltage conversion circuit and the temperature signal conditioning and collecting circuit;
the temperature signal conditioning and collecting module comprises an input interface J1 and an input interface J2 which are connected with the temperature testing interface (6); the first pin and the fourth pin of the input interface J1 and the first pin and the fourth pin of the input interface J2 are connected with a feedback circuit; the fourth pin of the input interface J1 is also connected with a sliding resistor R5 connected with the analog ground; a resistor R7 is connected between the third pin of the input interface J1 and the-IN pin of the operational amplifier CF 1; a resistor R8 is connected between the second pin of the input interface J1 and the + IN pin of the operational amplifier CF 1; a capacitor C4 is connected between the-IN pin and the + IN pin of the operational amplifier CF1, a first contact of the capacitor C4 is connected with a capacitor C3 connected with the analog ground, and a second contact of the capacitor C4 is connected with a capacitor C5 connected with the analog ground; a sliding resistor R13 is connected between a-RG pin and a + RG pin of the operational amplifier CF 1; a resistor R17 and a resistor R23 are connected between the OUTPUT pin of the operational amplifier CF1 and the third contact of the dual operational amplifier CF 2; a voltage stabilizing diode U7 is connected between the REF pin and the OUTPUT pin of the operational amplifier CF1, and a first contact of the voltage stabilizing diode is connected with a digital ground; a capacitor C12 and a capacitor C19 are connected between the-VS pin of the operational amplifier CF1 and the third contact of the dual operational amplifier CF2, and the capacitor C12 and the capacitor C19 are both connected with analog ground; the-VS pin of the operational amplifier CF1 is also connected with the voltage conversion circuit; the + VS pin of the operational amplifier CF1 is connected with a capacitor C11 connected with the analog ground, and the + VS pin of the operational amplifier CF1 is connected with the +5V pin of the power output-temperature interface J9; a first contact and a second contact of the dual operational amplifier CF2 are both connected with a first pin of the data acquisition interface J10 through a plug, and a capacitor C15 is connected between the connection end of the resistor R17 and the resistor R23 and the first pin of the data acquisition interface J10; the fifth contact of the double operational amplifier CF2 is connected with a capacitor C22 connected with the analog ground, and the fifth contact of the double operational amplifier CF2 is connected with a +5V pin of a power output-temperature interface J9; the fourth contact of the double operational amplifier CF2 is connected with the analog ground;
the fourth pin of the input interface J2 is also connected with a sliding resistor R6 connected with the analog ground; a resistor R9 is connected between the third pin of the input interface J2 and the-IN pin of the operational amplifier CF 3; a resistor R10 is connected between the second pin of the input interface J2 and the + IN pin of the operational amplifier CF 3; a capacitor C7 is connected between the-IN pin and the + IN pin of the operational amplifier CF3, a first contact of the capacitor C7 is connected with a capacitor C6 connected with the analog ground, and a second contact of the capacitor C7 is connected with a capacitor C8 connected with the analog ground; a sliding resistor R14 is connected between a-RG pin and a + RG pin of the operational amplifier CF 3; a resistor R18 and a resistor R24 are connected between the OUTPUT pin of the operational amplifier CF3 and the third contact of the double operational amplifier CF 4; a voltage regulator diode U8 is connected between the REF pin and the OUTPUT pin of the operational amplifier CF3, and a first contact of a voltage regulator diode U8 is connected with a digital ground; a capacitor C14 and a capacitor C20 are connected between the-VS pin of the operational amplifier CF3 and the third contact of the dual operational amplifier CF4, and the capacitor C14 and the capacitor C20 are both connected with analog ground; the-VS pin of the operational amplifier CF3 is also connected with the voltage conversion circuit; the + VS pin of the operational amplifier CF3 is connected with a capacitor C13 connected with the analog ground, and the + VS pin of the operational amplifier CF3 is connected with the +5V pin of the power output-temperature interface J9; the first contact and the second contact of the dual operational amplifier CF4 are both connected with the second pin of the data acquisition interface J10 through plugs, a capacitor C16 is connected between the connection end of the resistor R18 and the resistor R24 and the second pin of the data acquisition interface J10, and the third pin of the data acquisition interface J10 is grounded.
7. The multifunctional detection system for the electric heating belt of the heat preservation pipe as claimed in claim 6, wherein the voltage conversion circuit comprises a voltage converter U14 and a voltage converter U15; the V + pin of the voltage converter U14 is connected with the +5V pin of the power output-temperature interface J9; the +5V pin of the power output _ temperature interface J9 is formed by connecting a first pin, a third pin, a fifth pin and a seventh pin of the power output _ temperature interface J9, and a second pin, a fourth pin, a sixth pin and an eighth pin of the power output _ temperature interface J9 are all grounded; a capacitor C27 is connected between a CAP + pin and a CAP-pin of the voltage converter U14; an OUT pin of the voltage converter U14 is connected with a-VS pin of the dual operational amplifier CF1, and an LV pin and a GND pin of the voltage converter U14 are both connected with analog ground; the OUT pin of the voltage converter U14 is connected with a capacitor C28 connected with the analog ground, and the OUT pin of the voltage converter U14 outputs-5V voltage; the V + pin of the voltage converter U15 is connected with the +5V pin of the power output-temperature interface J9; a capacitor C29 is connected between a CAP + pin and a CAP-pin of the voltage converter U15; the LV pin and the GND pin of the voltage converter U15 are both connected with an analog ground; the OUT pin of the voltage converter U15 is connected with a capacitor C30 connected with an analog ground, the OUT pin of the voltage converter U15 is connected with the-VS pin of the dual operational amplifier CF3, and the OUT pin of the voltage converter U15 outputs a voltage of-5V.
8. The multifunctional detection system for the electrical heating belt of the heat preservation pipe as claimed in claim 6, wherein the feedback circuit comprises a 1mA1 feedback circuit, a 1mA2 feedback circuit, a 1mA3 feedback circuit and a 1mA4 feedback circuit; a first pin of the input interface J1 and a 1mA1 feedback circuit; the fourth pin of the input interface J1 is connected with the 1mA2 feedback circuit; a first pin of the input interface J2 is connected with a 1mA3 feedback circuit; the fourth pin of the input interface J2 is connected with the 1mA4 feedback circuit;
the 1mA1 feedback circuit comprises a voltage regulator U1, a second contact of the voltage regulator U1 is connected with a +5V pin of a power output-temperature interface J9, and a resistor R1 is connected between a first contact and a second contact of the voltage regulator U1; a resistor R2 is connected between a third contact and the first contact of the voltage regulator U1, and the third contact of the voltage regulator U1 is connected with an analog ground; a first contact of the voltage regulator source U1 is connected with an IN + pin of the operational amplifier CF 5; a resistor R15 is connected between an IN-pin of the operational amplifier CF5 and a second contact of the voltage regulator U1, an IN-pin of the operational amplifier CF5 is connected with a point E of the triode Q1, and an OUTPUT pin of the operational amplifier CF5 is connected with a point B of the triode Q1 through a resistor R11; the C point of the triode Q1 is connected with the first pin of the input interface J1; the V-pin of the operational amplifier CF5 is connected with a capacitor C1 connected with an analog ground, and the V-pin of the operational amplifier CF5 is also connected with the OUT pin of the voltage converter U14; the V + pin of the operational amplifier CF5 is connected with a capacitor C10 connected with the analog ground, and the V + pin of the operational amplifier CF5 is connected with the +5V pin of a power output-temperature interface J9;
the 1mA2 feedback circuit comprises a voltage regulator U2, a second contact of the voltage regulator U2 is connected with a +5V pin of a power output-temperature interface J9, and a resistor R3 is connected between a first contact and a second contact of the voltage regulator U2; a resistor R4 is connected between a third contact and the first contact of the voltage regulator U2, and the third contact of the voltage regulator U2 is connected with an analog ground; a first contact of the voltage regulator source U2 is connected with an IN + pin of the operational amplifier CF 6; a resistor R16 is connected between an IN-pin of the operational amplifier CF6 and a second contact of the voltage regulator U2, an IN-pin of the operational amplifier CF6 is connected with a point E of the triode Q1, and an OUTPUT pin of the operational amplifier CF6 is connected with a point B of the triode Q2 through a resistor R12; the C point of the triode Q2 is connected with the first pin of the input interface J1; the V-pin of the operational amplifier CF6 is connected with a capacitor C2 connected with an analog ground, and the V-pin of the operational amplifier CF6 is also connected with the OUT pin of the voltage converter U15; the V + pin of the operational amplifier CF5 is connected with a capacitor C9 connected with analog ground, and the V + pin of the operational amplifier CF6 is connected with the +5V pin of a power output _ temperature interface J9;
the 1mA3 feedback circuit comprises a voltage regulator U9, a second contact of the voltage regulator U9 is connected with a +5V pin of a power output-temperature interface J9, and a resistor R19 is connected between a first contact and a second contact of the voltage regulator U9; a resistor R20 is connected between a third contact and the first contact of the voltage regulator U9, and the third contact of the voltage regulator U9 is connected with an analog ground; a first contact of the voltage regulator source U9 is connected with an IN + pin of the operational amplifier CF 7; a resistor R27 is connected between an IN-pin of the operational amplifier CF7 and a second contact of the voltage regulator U9, an IN-pin of the operational amplifier CF7 is connected with a point E of the triode Q3, and an OUTPUT pin of the operational amplifier CF7 is connected with a point B of the triode Q3 through a resistor R25; the C point of the triode Q3 is connected with the first pin of the input interface J2; the V-pin of the operational amplifier CF7 is connected with a capacitor C17 connected with an analog ground, and the V-pin of the operational amplifier CF7 is also connected with the OUT pin of the voltage converter U15; the V + pin of the operational amplifier CF7 is connected with a capacitor C25 connected with the analog ground, and the V + pin of the operational amplifier CF7 is connected with the +5V pin of a power output-temperature interface J9;
the 1mA4 feedback circuit comprises a voltage regulator U10, a second contact of the voltage regulator U10 is connected with a +5V pin of a power output-temperature interface J9, and a resistor R21 is connected between a first contact and a second contact of the voltage regulator U10; a resistor R22 is connected between a third contact and the first contact of the voltage regulator U10, and the third contact of the voltage regulator U10 is connected with an analog ground; a first contact of the voltage regulator source U10 is connected with an IN + pin of the operational amplifier CF 8; a resistor R28 is connected between an IN-pin of the operational amplifier CF8 and a second contact of the voltage regulator U10, an IN-pin of the operational amplifier CF8 is connected with a point E of the triode Q4, and an OUTPUT pin of the operational amplifier CF8 is connected with a point B of the triode Q4 through a resistor R26; the C point of the triode Q4 is connected with the first pin of the input interface J2; the V-pin of the operational amplifier CF8 is connected with a capacitor C18 connected with an analog ground, and the V-pin of the operational amplifier CF8 is also connected with the OUT pin of the voltage converter U15; the V + pin of the operational amplifier CF8 is connected to the capacitor C24 connected to analog ground, and the V + pin of the operational amplifier CF8 is connected to the +5V pin of the power output _ temperature interface J9.
9. The multifunctional detection system for the electric heating belt of the heat preservation pipe as claimed in claim 1, wherein a fan control circuit for controlling the operation of the fan (7) in the test module is further arranged on the main control board, and the fan control circuit comprises a transistor chip U16 and a transistor chip U17; the CAT pin of the transistor chip U16 is connected with the PD10 pin of the board-to-board connector M1; AN AN pin of the transistor chip U16 is connected with AN output end of the resistor R4, and AN input end of the resistor R4 is connected with the 3.3V power supply conversion circuit; the COL pin of the transistor chip U16 is connected with the first contact of the resistor R6 and the G contact of the field effect transistor Q1, and the second contact of the resistor R6 and the S contact of the field effect transistor Q1 are both connected with the power interface circuit; the D contact of the field effect transistor Q1 is connected with the second pin of the power output _ fan interface J7 through a plug, and the first pin of the power output _ fan interface J7 is connected with the power interface circuit; the EM pin of the transistor chip U16 is connected with the power interface circuit;
the CAT pin of the transistor chip U17 is connected with the PD14 pin of the board-to-board connector M1; AN AN pin of the transistor chip U17 is connected with AN output end of the resistor R5, and AN input end of the resistor R5 is connected with the 3.3V power supply conversion circuit; the COL pin of the transistor chip U17 is connected with the first contact of the resistor R7 and the G contact of the field effect transistor Q2, and the second contact of the resistor R7 and the S contact of the field effect transistor Q2 are both connected with the power interface circuit; the D contact of the field effect transistor Q2 is connected with the second pin of the power output _ fan interface J20 through a plug, and the first pin of the power output _ fan interface J20 is connected with the power interface circuit; the EM pin of transistor chip U17 is connected to a power interface circuit.
10. The system according to claim 1, wherein the temperature probe module is attached to the inner wall of the heat preservation pipe, and a plurality of temperature measurement sensors are arranged on the temperature probe module; the temperature measuring sensor is a surface temperature measuring sensor.
CN202210744658.8A 2022-06-29 2022-06-29 Multifunctional detection system for electric heating belt of heat preservation pipe Pending CN114814443A (en)

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