CN210243679U - Portable tester for multi-path synchronous measurement of rotating speed and amplitude of rotating mechanical equipment - Google Patents
Portable tester for multi-path synchronous measurement of rotating speed and amplitude of rotating mechanical equipment Download PDFInfo
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- CN210243679U CN210243679U CN201921522986.3U CN201921522986U CN210243679U CN 210243679 U CN210243679 U CN 210243679U CN 201921522986 U CN201921522986 U CN 201921522986U CN 210243679 U CN210243679 U CN 210243679U
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Abstract
The utility model discloses a portable tester of multichannel synchronous measurement rotating machinery equipment rotational speed and amplitude, include: the signal switching unit is responsible for completing the switching work of N paths of tested signals for gating M paths of signals under the control of the main control unit; the square wave conversion unit is responsible for converting the M paths of output signals switched by the signal switching unit from sine waves to square waves with the same frequency so as to meet the reading requirement of the main control unit on pulse signals; the analog-to-digital conversion unit is responsible for performing analog-to-digital conversion on the M paths of output signals after the switching of the signal switching unit; and the main control unit is responsible for receiving the signal of the square wave conversion unit and calculating to obtain rotating speed data, and receiving the data of the analog-to-digital conversion unit and calculating to obtain amplitude data. The tester has high measurement precision, and can realize accurate measurement of the rotating speed and the amplitude of 20 pieces of rotating mechanical equipment.
Description
Technical Field
The utility model belongs to the technical field of detection device, concretely relates to portable tester of multichannel synchronous measurement rotating machinery equipment rotational speed and amplitude.
Background
At present, the rotating speed and amplitude measuring device for the rotating mechanical equipment in China has the following defects:
1. most devices using the DSP as a measurement core are used for one-way monitoring, measurement data are locally displayed through a liquid crystal screen, and the measurement data cannot be stored.
2. A few devices using the DSP as a measurement core are used for multi-path monitoring, but power supply lines and communication lines of the devices need to be laid in advance, monitored data need to be displayed in a central control room, parameters cannot be displayed, inquired and stored on a measurement site, and the portable characteristic is not obvious.
The multi-path amplitude measuring device with LabView as the framework has the advantages that the acquisition card is expensive and large in required facilities, generally does not have the portable measuring function, cannot meet the measuring requirement of an operation field, is limited by the number of signal acquisition channels of the acquisition card, generally measures 4 paths and 8 paths in parallel, and cannot meet the requirement of 20 paths of synchronous measurement of the operation field.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a portable tester of multichannel synchronous measurement rotating mechanical equipment rotational speed and amplitude. The measuring device can simultaneously measure the rotating speed and the amplitude of 20 pieces of rotating mechanical equipment, can locally display measured data through display equipment, can also store and inquire the measured data, and has a plurality of advantages of portable measuring function and the like.
The utility model discloses a realize through following technical scheme:
a portable tester for multi-path synchronous measurement of rotating speed and amplitude of rotating mechanical equipment comprises:
the signal switching unit is responsible for completing the switching work of N paths of tested signals for gating M paths of signals under the control of the main control unit; n is an integral multiple of M;
the square wave conversion unit is responsible for converting the M paths of output signals switched by the signal switching unit from sine waves to square waves with the same frequency so as to meet the reading requirement of the main control unit on pulse signals;
the analog-to-digital conversion unit is responsible for performing analog-to-digital conversion on the M paths of output signals after the switching of the signal switching unit;
the main control unit is connected with the signal switching unit, the square wave conversion unit and the analog-to-digital conversion unit and is responsible for receiving signals of the square wave conversion unit and calculating to obtain rotating speed data and receiving data of the analog-to-digital conversion unit to calculate to obtain amplitude data.
In the technical scheme, the main control unit is further connected with an upper computer through the communication unit, and the main control unit sends the calculated rotating speed data and the calculated amplitude data to the upper computer through the communication unit and displays the data by the upper computer.
In the above technical solution, the communication unit includes an ethernet PHY chip and an RJ45 interface.
In the technical scheme, the signal switching unit comprises M channel switching chips and a signal input port, the M channel switching chips are connected with the main control unit by using the same address line, M channels in the N signals are selected for gating, and after the gating is finished, the main control unit changes the signals of the address line and switches to the next M channels.
In the above technical solution, the channel switching chip adopts ADG 408.
In the above technical solution, the square wave converting unit includes M identical square wave converting circuits, and the M output signals of the signal switching unit are processed correspondingly.
In the above technical solution, the analog-to-digital conversion unit includes M identical analog-to-digital conversion circuits, and the M output signals of the signal switching unit are processed correspondingly.
In the technical scheme, the portable tester for the multi-path synchronous measurement of the rotating speed and the amplitude of the rotating mechanical equipment comprises a portable shell, wherein the shell comprises an upper layer and a lower layer, the upper layer and the lower layer are separated by using a partition plate, a circuit board and a battery are arranged on the lower layer, and a switch for controlling the circuit board, a tablet computer, a battery electric quantity monitoring meter, a signal input port and a battery charging hole are arranged on the partition plate on the upper layer; the tested signal enters the circuit board through the signal input port, and an RJ45 interface in the circuit board is connected with a network port in the tablet computer through a network cable and used for communication between commands and data; the battery is provided with two circuits, one circuit controls the on-off of the power supply of the circuit board through a switch, and the other circuit is used for inputting electric quantity and is connected with a battery charging hole; the electricity meter is connected in parallel at two ends of the battery through a lead and used for displaying the electric quantity of the battery.
In the above technical solution, the main control unit employs a DSP chip.
In the above technical solution, the model of the main control unit is SH 7216.
In the above technical solution, the analog-to-digital conversion circuit includes a differential chip AD8131, a digital-to-analog conversion chip AD7767, and resistors R11 and R12, and the connection relationship is as follows: the resistor R12 is connected with the 8 pins of the AD8131, the 1 pin of the AD8131 is grounded through the R11, the 3 and 6 pins of the AD8131 are respectively connected with +5V and-5V, the 4 and 5 pins of the AD8131 are respectively connected with the 4 and 5 pins of the AD7767, the 6, 11, 15 and 16 pins of the AD7767 are grounded, the 8 and 9 pins are connected with 3.3V, the 1 pin is connected with 2.5V, the 2 pin is connected with 4V, 7, 12, 13 and 14 pins of the AD7767 are respectively connected with the 172, 77, 162 and 165 of the main control unit SH 7216.
In the above technical solution, the digital signal converted by the analog-to-digital conversion unit is transmitted to the designated register of the main control unit in the SPI serial communication manner to wait for calculation.
The utility model discloses an advantage and beneficial effect do:
1. the tester has high measurement precision, and can realize accurate measurement of the rotating speed and the amplitude of 20 rotating mechanical devices;
2. the tester has complete functions, such as parameter display, data storage and inquiry, upper and lower limit setting, trend graph display, real-time statistical display of the average value of the maximum value and the minimum value and the like;
3. the tester is small in size, only has the size of a suitcase, is convenient to carry and use, can measure the rotating equipment at any position by carrying the tester, and is particularly suitable for the complex industrial environment of a factory.
Drawings
FIGS. 1.1-1.3 are overall structural diagrams of the tester;
FIG. 2 is a schematic diagram of a tester device connection;
FIG. 3 is a schematic circuit diagram of a circuit board of the tester;
FIG. 4 is a circuit diagram of a signal switching unit;
FIG. 5 is a schematic circuit diagram of a square wave conversion unit;
FIG. 6 is a schematic circuit diagram of an analog-to-digital conversion unit;
FIG. 7 is a circuit diagram of a daisy chain structure of analog-to-digital conversion chips;
FIG. 8 is a schematic circuit diagram of a communication unit;
fig. 9 is a schematic circuit diagram of the power supply unit.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical field person understand the solution of the present invention better, the technical solution of the present invention is further described below with reference to the specific embodiments.
A portable tester for multi-path synchronous measurement of rotating speed and amplitude of rotating mechanical equipment is disclosed, referring to attached figure 1.1-1.3, comprising a portable shell 1, wherein the shell 1 comprises an upper layer and a lower layer, the upper layer and the lower layer are separated by a clapboard 4, the lower layer is provided with a circuit board 2 and a battery 3, the upper layer is provided with a switch 5 for controlling the circuit board on the clapboard 4, a tablet computer 6, a battery electric quantity monitoring meter 7, a signal input port 8 and a battery charging hole 9.
As shown in fig. 2, an external signal enters the circuit board 2 through the signal input port 8, and an RJ45 interface in the circuit board 2 is connected with a network port in the tablet computer 6 through a network cable for communication of commands and data; the battery 3 is provided with two circuits, one circuit controls the on-off of the power supply of the circuit board through the switch 5, and the other circuit is used for inputting electric quantity and is connected with a battery charging hole 9; the electricity meter 7 is connected in parallel with two ends of the battery 3 through a conducting wire and is used for displaying the electricity quantity of the battery 3.
As shown in fig. 3, the wiring board 2 includes six units: the device comprises a signal switching unit 10, a square wave conversion unit 11 (sharing the same four paths), an analog-to-digital conversion unit 12 (sharing the same four paths), a main control unit 13, a communication unit 14 and a power supply unit 15. After 20 paths of measured signals enter a circuit board, firstly, the signals are shunted through a signal switching unit 10 under the control of a main control unit 13, four paths of switched signals respectively enter a square wave conversion unit 11 and an analog-digital conversion unit 12, the main control unit 13 receives the signals of the square wave conversion unit 11 to calculate rotating speed data, the main control unit 13 receives the data of the analog-digital conversion unit 12 to calculate amplitude data, the obtained data is sent to a tablet computer 6 in a UDP protocol mode through a communication unit 14, and the tablet computer 6 can perform functions of trend graph display, maximum and minimum average value real-time statistical display and the like; the power supply unit 15 is responsible for supplying power to the entire circuit board 2.
As shown in fig. 4, the signal switching unit 10 is responsible for completing switching operation of gating four signals among 20 tested signals under the control of the main control unit 13. The signal switching unit 10 includes four channel switching chips 16 (model ADG408) and a signal input port 8, the four channel switching chips use the same address line, 4 of the 20 channels of signals are selected for gating, and after the gating is completed, the main control unit 13 changes the signal of the address line and switches to the next 4 channels. The circuit connection relationship of the signal switching unit is as follows: pins 1, 2 and 3 of a main control unit 13 (the model is a DSP chip SH7216) are respectively connected to pins 1, 16 and 15 of four channel switching chips, pins 1 to 20 of a signal input port 8 are sequentially and respectively connected to pins 4, 5, 6, 7 and 17 of the four channel switching chips 16, and pins 8 of the four channel switching chips 16 are respectively used as output signals AOUT after four switching operations are completed. The signal channels corresponding to the channel switching chip ADG408 chip are shown in table 1.
Table 1 channel switching chip and signal channel corresponding table
The square wave conversion unit 11 is mainly responsible for completing the conversion of four paths of AOUT signals after channel switching from sine waves to square waves with the same frequency so as to meet the reading requirement of the main control unit on pulse signals. The square wave transforming unit has four identical square wave transforming circuits, which respectively correspond to the four AOUT signals of the signal processing unit 10. Referring to fig. 5, taking the 1-way square wave conversion circuit as an example, the square wave conversion circuit includes an operational amplifier chip 17 (model AD822), a comparator chip 18 (model LM393), resistors R1-R8, and capacitors C1-C3, and the circuit connection relationship is as follows: the AOUT signal (namely 8 pins of a channel switching chip 16) is connected with 5 pins of an AD822 through a filter consisting of R1 and C1, 4 pins of the AD822 are grounded, 6 pins of the AD822 are grounded through a resistor R2, 8 pins of the AD822 are connected with a 3.3V voltage source, one end of a capacitor C2 is connected with the voltage source, the other end of the capacitor C2 is grounded, 7 pins of the AD822 are directly connected with 3 pins, 2 pins of the AD822 are grounded through a resistor R3, 2 pins of the AD822 are also connected with 1 pin of the AD822 through a resistor R4, 1 pin of the AD822 is connected with 3 pin of a comparator chip LM393 through a resistor R5, 3.3V is connected with resistors R7 and R8 which are connected in series and are connected with the ground to form a resistor voltage division, the other end of the R8 is connected with 2 pin of the LM393, 4 pins of the LM393 are grounded, 8 pins of the LM393 are connected with a 3.3V voltage source, one end of a capacitor C3 is connected with the voltage source, one end of the ground, and simultaneously, 8 pins of the LM393 are connected with an LM393 output square, the main control unit 13 detects the rotation speed.
The analog-to-digital conversion unit 12 is mainly responsible for performing analog-to-digital conversion on the four switched AOUT signals, and the analog-to-digital conversion unit 12 is provided with four identical analog-to-digital conversion circuits, which respectively correspond to the four AOUT signals of the signal switching unit 10. As shown in fig. 6, taking 1 way of the analog-to-digital conversion circuit as an example, the analog-to-digital conversion circuit includes a differential chip 19 (model AD8131), a digital-to-analog conversion chip 20 (model AD7767), and resistors R11 and R12, and the connection relationship is as follows: the AOUT signal (i.e. 8 pins of the channel switching chip 16) is connected to 8 pins of the AD8131 through a resistor R12, pin 1 of the AD8131 is grounded through a resistor R11, pins 3 and 6 of the AD8131 are respectively connected to +5V and-5V, pins 4 and 5 of the AD8131 are respectively connected to pins 4 and 5 of the AD7767, pins 6, 11, 15 and 16 of the AD7767 are grounded, pins 8 and 9 are connected to 3.3V, pin 1 is connected to 2.5V, pin 2 is connected to pins 4V, 7, 12, 13 and 14, and are respectively connected to pins 172, 77, 162 and 165 of a main control unit (model is DSP chip SH 7216). Further, as shown in fig. 7, the digital signal converted by the analog-to-digital conversion unit 12 is transmitted to a designated register of the main control unit in the form of SPI serial communication to wait for calculation. The four digital-to-analog conversion chips AD7767 are connected end to form a daisy chain structure for data transmission. The 15 pins of the first AD7767 chip 20(1) are grounded, the 10 pins of the first AD7767 chip are grounded, the 15 pins of the second AD7767 chip 20(2), the 10 pins of the second AD7767 chip 20(2) are grounded, the 15 pins of the third AD7767 chip 20(3), the 10 pins of the third AD7767 chip 20(3) are grounded, the 15 pins of the fourth AD7767 chip 20(4), and the 10 pins of the fourth AD7767 chip 20(4) are grounded, and the 160 pins of the DSP chip SH7216 of the main control unit 13, so that data transmission is completed.
As shown in fig. 8, the communication unit 14 is mainly responsible for transmitting the rotational speed and amplitude data obtained by the operation of the main control unit through an ethernet interface, and the communication protocol is UDP. The communication unit includes an ethernet PHY chip 21 (model RTL8201) and an RJ45 interface, and the connection relationship is: pins 79, 80, 81, 84, 87, 88, 89, 90, 91, 92, 93, 94, 97, 98, 99, 100, 101 and 102 of a DSP chip SH7216 of the main control unit 13 are respectively connected with pins 26, 9, 25, 1, 23, 16, 21, 20, 19, 18, 24, 22, 7, 2, 6, 5, 4 and 3 of an RTL8201, pins 8, 32, 28, 37, 38, 39, 40, 41, 42, 43 and 44 of the RTL8201 are grounded, and pins 30, 31, 33 and 34 of the RTL8201 are connected with pins 4, 3, 2 and 1 of an RJ45 interface.
As shown in fig. 9, the power supply unit 15 is mainly responsible for supplying power to each unit of the whole system, including ± 12V, ± 5V, +5V, 4V, 3.3V, and 2.5V, and the power supply unit 15 includes power chips 22-28, the types of which are: the power supply chip WRA2412YMD-3W, the power supply chip WRA2405YMD-3W, the power supply chip LM7805, the power supply chip LM7905, the power supply chip REF3140, the power supply chip REG1117-2.5V and the power supply chip REG 1117-3.3V; the connection relationship is that pins 1 and 2 of WRA2412YMD-3W and WRA2405YMD-3W are grounded and 24V external power supply respectively, pin 3 of WRA2412YMD-3W is connected with pin 1 of LM7805, pin 3 is connected with pin 1 of LM7905, pin 4 is connected with pin 2 of LM7805, pin 2 of LM7905, pin 2 of REF3140 and pin 2 of REG 1117-2.5V. The 3 pin of LM7805 is connected with the 1 pin of REF3140, the 1 pin of REG 1117-2.5 V. Pins 3 and 5 of WRA2405YMD-3W are connected to pins 1 and 2 of REG1117-3.3V, respectively. Pins 3 and 5 of WRA2412YMD-3W provide a 12V power supply, pin 3 of LM7805 and pin 3 of LM7905 provide a 5V power supply, pin 3 of REG1117-2.5V provides a 2.5V power supply, pin 3 of WRA2405YMD-3W provides a +5V power supply, pin 3 of REF3140 provides a 4V power supply, and pin 3 of REG1117-3.3V provides a 3.3V power supply.
The invention has been described above by way of example, and it should be noted that any simple variants, modifications or other equivalent substitutions by a person skilled in the art without spending creative effort may fall within the scope of protection of the present invention without departing from the core of the present invention.
Claims (13)
1. The utility model provides a portable tester of rotatory mechanical equipment rotational speed and amplitude is measured in multichannel synchronization which characterized in that includes:
the signal switching unit is responsible for completing switching work of N paths of tested signals for gating M paths of signals under the control of the main control unit, wherein N is an integral multiple of M;
the square wave conversion unit is responsible for converting the M paths of output signals switched by the signal switching unit from sine waves to square waves with the same frequency so as to meet the reading requirement of the main control unit on pulse signals;
the analog-to-digital conversion unit is responsible for performing analog-to-digital conversion on the M paths of output signals switched by the signal switching unit;
the main control unit is connected with the signal switching unit, the square wave conversion unit and the analog-to-digital conversion unit and is responsible for receiving signals of the square wave conversion unit and calculating to obtain rotating speed data and receiving data of the analog-to-digital conversion unit to calculate to obtain amplitude data.
2. The portable multi-channel tester for synchronously measuring the rotation speed and the amplitude of the rotating mechanical equipment as claimed in claim 1, wherein: the main control unit is also connected with an upper computer through a communication unit.
3. The portable multi-channel tester for synchronously measuring the rotation speed and the amplitude of the rotating mechanical equipment as claimed in claim 2, wherein: the communication unit comprises an Ethernet PHY chip and an RJ45 interface.
4. The portable multi-channel tester for synchronously measuring the rotation speed and the amplitude of the rotating mechanical equipment as claimed in claim 1, wherein: the signal switching unit comprises M channel switching chips and a signal input port, the M channel switching chips are connected with the main control unit by using the same address line, M channels in the N signals are selected for gating, and after the gating is finished, the main control unit changes the signals of the address line and switches to the next M channels.
5. The portable multi-channel tester for synchronously measuring the rotation speed and the amplitude of the rotating mechanical equipment as claimed in claim 4, wherein: the channel switching chip employs ADG 408.
6. The portable multi-channel tester for synchronously measuring the rotation speed and the amplitude of the rotating mechanical equipment as claimed in claim 1, wherein: the square wave conversion unit comprises M paths of same square wave conversion circuits which respectively correspond to the M paths of output signals of the processing signal switching unit.
7. The portable multi-channel tester for synchronously measuring the rotation speed and the amplitude of the rotating mechanical equipment as claimed in claim 1, wherein: the analog-to-digital conversion unit comprises M paths of same analog-to-digital conversion circuits which respectively correspond to the M paths of output signals of the processing signal switching unit.
8. The portable multi-channel tester for synchronously measuring the rotation speed and the amplitude of the rotating mechanical equipment as claimed in claim 1, wherein: the portable tester for the multi-path synchronous measurement of the rotating speed and the amplitude of the rotating mechanical equipment comprises a portable shell, wherein an upper layer and a lower layer are arranged in the shell, the upper layer and the lower layer are separated by a partition plate, a circuit board and a battery are arranged on the lower layer, and a switch for controlling the circuit board, a tablet computer, a battery power monitoring meter, a signal input port and a battery charging hole are arranged on the partition plate on the upper layer; the tested signal enters the circuit board through the signal input port, and an RJ45 interface in the circuit board is connected with a network port in the tablet computer through a network cable and used for communication between commands and data; the battery is provided with two circuits, one circuit controls the on-off of the power supply of the circuit board through a switch, and the other circuit is used for inputting electric quantity and is connected with a battery charging hole; the electricity meter is connected in parallel at two ends of the battery through a lead and used for displaying the electric quantity of the battery.
9. The portable multi-channel tester for synchronously measuring the rotation speed and the amplitude of the rotating mechanical equipment as claimed in claim 1, wherein: the main control unit adopts a DSP chip.
10. The portable multi-channel tester for synchronously measuring the rotation speed and the amplitude of the rotating mechanical equipment as claimed in claim 9, wherein: the master unit model is SH 7216.
11. The portable multi-channel tester for synchronously measuring the rotation speed and the amplitude of the rotating mechanical equipment as claimed in claim 7, wherein: the analog-to-digital conversion circuit comprises a differential chip AD8131, a digital-to-analog conversion chip AD7767, resistors R11 and R12, and the connection relationship is as follows: the resistor R12 is connected with the 8 pins of the AD8131, the 1 pin of the AD8131 is grounded through the R11, the 3 and 6 pins of the AD8131 are respectively connected with +5V and-5V, the 4 and 5 pins of the AD8131 are respectively connected with the 4 and 5 pins of the AD7767, the 6, 11, 15 and 16 pins of the AD7767 are grounded, the 8 and 9 pins are connected with 3.3V, the 1 pin is connected with 2.5V, the 2 pin is connected with 4V, 7, 12, 13 and 14 pins of the AD7767 are respectively connected with the 172, 77, 162 and 165 of the main control unit SH 7216.
12. The portable multi-channel tester for synchronously measuring the rotation speed and the amplitude of the rotating mechanical equipment as claimed in claim 1, wherein: the digital signal converted by the analog-to-digital conversion unit is transmitted to the main control unit in an SPI serial communication mode.
13. The portable multi-channel tester for synchronously measuring the rotation speed and the amplitude of the rotating mechanical equipment as claimed in claim 1, wherein: n is 20 and M is 4.
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| CN201921522986.3U CN210243679U (en) | 2019-09-12 | 2019-09-12 | Portable tester for multi-path synchronous measurement of rotating speed and amplitude of rotating mechanical equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514865A (en) * | 2019-09-12 | 2019-11-29 | 核工业理化工程研究院 | A kind of Multi-path synchronous measures the portable tester of rotating machinery revolving speed and amplitude |
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- 2019-09-12 CN CN201921522986.3U patent/CN210243679U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514865A (en) * | 2019-09-12 | 2019-11-29 | 核工业理化工程研究院 | A kind of Multi-path synchronous measures the portable tester of rotating machinery revolving speed and amplitude |
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