CN216410482U - Pressure testing system of hydraulic switch machine - Google Patents
Pressure testing system of hydraulic switch machine Download PDFInfo
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- CN216410482U CN216410482U CN202122743587.3U CN202122743587U CN216410482U CN 216410482 U CN216410482 U CN 216410482U CN 202122743587 U CN202122743587 U CN 202122743587U CN 216410482 U CN216410482 U CN 216410482U
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Abstract
The utility model discloses a pressure test system of a hydraulic switch machine, which comprises: the system comprises a host and at least one pressure monitoring terminal, wherein the host is connected with each pressure monitoring terminal; the pressure monitoring terminal is arranged at a set position of the hydraulic switch machine and used for monitoring action pressure data corresponding to the hydraulic switch machine; the host computer obtains the action pressure data of the corresponding hydraulic switch machine monitored by each pressure monitoring terminal, and obtains the state of each hydraulic switch machine according to the action pressure data obtained by each pressure monitoring terminal. The pressure testing system of the hydraulic switch machine can conveniently test the hydraulic pressure of the hydraulic switch machine, can analyze the pressure transformation trend of the hydraulic switch machine and passes the maintenance efficiency of the switch machine.
Description
Technical Field
The utility model belongs to the technical field of pressure testing, relates to a pressure testing system, and particularly relates to a pressure testing system of a hydraulic switch machine.
Background
With the increasing of the railway traffic volume, the running speed of the train is continuously improved, the running density of the train is gradually increased, and the safety requirements on the railway running and the safety running and maintenance requirements of signal equipment, particularly a point switch, are also increasingly improved. The regulation of the working oil pressure of the hydraulic switch machine is a main work of signal maintenance work. The signal worker needs to carry a heavy pressure test instrument and also needs to connect the test instrument into the pressure test hole, which wastes time and labor; meanwhile, the liquid pressure value of the hydraulic switch machine during working cannot be obtained, so that the pressure change trend of the hydraulic switch machine cannot be analyzed.
With the increase of the running speed of the train, the installation quantity of the speed-up turnouts is more and more, the maintenance work of the hydraulic point switch is heavier and heavier, and the speed-up turnouts become an important subject of an electric service maintenance department.
In view of the above, there is an urgent need to design a new hydraulic switch machine pressure testing method to overcome at least some of the above-mentioned disadvantages of the existing hydraulic switch machine pressure testing methods.
SUMMERY OF THE UTILITY MODEL
The utility model provides a pressure testing system of a hydraulic switch machine, which can conveniently test the hydraulic pressure of the hydraulic switch machine, can analyze the pressure transformation trend of the hydraulic switch machine and passes the maintenance efficiency of the switch machine.
In order to solve the technical problem, according to one aspect of the present invention, the following technical solutions are adopted:
a hydraulic switch machine pressure testing system, the pressure testing system comprising: the system comprises a host and at least one pressure monitoring terminal, wherein the host is connected with each pressure monitoring terminal;
the pressure monitoring terminal is arranged at a set position of the hydraulic switch machine and used for monitoring action pressure data corresponding to the hydraulic switch machine;
the host computer obtains the action pressure data of the corresponding hydraulic switch machine monitored by each pressure monitoring terminal, and obtains the state of each hydraulic switch machine according to the action pressure data obtained by each pressure monitoring terminal.
As an embodiment of the present invention, the pressure monitoring terminal includes: the system comprises an MCU (microprogrammed control unit) microcontroller, a CT (computed tomography) mutual inductor, a pressure sensing module, a signal conditioning circuit, an analog-to-digital conversion circuit, a trigger circuit, a WDT (wireless data transmission) supervision timer, a communication module and a power management circuit;
the MCU microcontroller is respectively connected with the CT mutual inductor, the pressure sensing module, the signal conditioning circuit, the analog-to-digital conversion circuit, the trigger circuit, the WDT supervision timer, the communication module and the power management circuit;
the input end of the CT transformer is connected with the output end of the switch machine motor and used for converting the current of the switch machine motor into a low-voltage signal;
the output end of the CT transformer is connected with the input end of the signal conditioning circuit and used for sending the acquired low-voltage signal to the signal conditioning circuit; the signal conditioning circuit is used for conditioning the received low-voltage signal;
the pressure sensing module comprises a pressure sensor, an amplifier and an active filter which are connected in sequence; the pressure sensor is used for sensing an oil pressure signal of the hydraulic switch machine, and the output end of the pressure sensor is connected with the input end of the amplifier and sends the sensed oil pressure signal to the amplifier for signal amplification; the output end of the amplifier is connected with the input end of the active filter and used for sending the amplified signal to the active filter; the active filter is used for carrying out active filtering on the received signal;
the output end of the pressure sensing module is connected with the input end of the signal conditioning circuit and used for sending the acquired oil pressure signal to the signal conditioning circuit; the signal conditioning circuit is used for performing signal conditioning on the received oil pressure signal;
the output end of the signal conditioning circuit is connected with the input end of the digital-to-analog conversion circuit and used for sending the conditioned signal to the analog-to-digital conversion circuit; the analog-to-digital conversion circuit is used for converting the received analog signals into digital signals;
the output end of the analog-to-digital conversion circuit is connected with the input end of the MCU microcontroller and used for transmitting the digital signal obtained by conversion to the MCU microcontroller;
the output end of the trigger circuit is connected with the input end of the MCU microcontroller and used for sending a trigger signal to the MCU microcontroller;
the output end of the WDT supervision timer is connected with the input end of the MCU microcontroller and used for sending WDT supervision timing signals to the MCU microcontroller.
As an embodiment of the present invention, the pressure monitoring terminal includes a data acquisition and conversion circuit, the data acquisition and conversion circuit includes a plurality of data acquisition and conversion units, each data acquisition and conversion unit includes a first chip IC1, a sixth chip IC6, a plurality of diodes, and a plurality of resistors;
a first pin of the first chip IC1 is respectively connected with the cathode of a first diode D1 and a first end of a first resistor R1; the second pin of the first chip IC1 is connected with the second pin of a sixth chip IC 6;
a third pin of the first chip IC1 is respectively connected to a cathode of a third diode D3 and a first end of a third resistor R3; the fourth pin of the first chip IC1 is connected with the fifth pin of a sixth chip IC 6;
a fifth pin of the first chip IC1 is respectively connected to a cathode of a fourth diode D4 and a first end of a third resistor R4; the sixth pin of the first chip IC1 is connected with the sixth pin of a sixth chip IC 6; a seventh pin VSS pin of the first chip IC1 is connected with a seventh pin VSS pin of a sixth chip IC 6;
the eighth pin of the first chip IC1 is connected with the first pin of a sixth chip IC 6;
a ninth pin of the first chip IC1 is respectively connected to a cathode of the second diode D2 and a first end of the second resistor R2; the first zero pin of the first chip IC1 is connected with the first third pin of a sixth chip IC 6;
a first pin of the first chip IC1 is respectively connected with a cathode of a sixth diode D6 and a first end of a sixth resistor R6; the first two pins of the first chip IC1 are connected with the first two pins of a sixth chip IC 6;
a first third pin of the first chip IC1 is respectively connected to a cathode of a fifth diode D5 and a first end of a fifth resistor R5; the first four-pin VDD pin of the first chip IC1 is connected with the first four-pin VDD pin of a sixth chip IC 6;
a third pin of the sixth chip IC6 is connected to the first LED through a third resistor R31; a fourth pin of the sixth chip IC6 is connected with a second LED through a third resistor R32;
a first pin of the sixth chip IC6 is connected with a third LED through a third resistor R33; the first zero pin of the sixth chip IC6 is connected to the fourth LED through a third fourth resistor R34.
As an embodiment of the present invention, the pressure monitoring terminal includes a control circuit, and the control circuit includes a main control circuit, a plurality of data acquisition circuits, a communication circuit, and a power circuit; the main control circuit is respectively connected with each data acquisition circuit and the communication circuit, and the power supply circuit provides electric energy required by work for the main control circuit, each data acquisition circuit and the communication circuit.
As an embodiment of the present invention, the data acquisition circuit includes a second processor U2, a plurality of capacitors, a plurality of resistors;
a sixth pin V + of the second processor U2 is connected with a power supply VCC, and a first pin CDIS of the second processor U2 is connected with a first pin of the eighth processor U8;
a fourth pin VIN of the second processor U2 is connected with a second end of a sixth resistor R6; a first end of the sixth resistor R6 is connected to the fifth pin VO1 of the second processor U2 and a second end of the first fifth capacitor C15, respectively;
a third pin PC1 of the second processor U2 is connected with a first end of a second capacitor C2, and a second pin PC2 of the second processor U2 is connected with a first end of a third capacitor C3; a seventh pin V-pin of the second processor U2, a second end of a second capacitor C2, a second end of a third capacitor C3, and a first end of a second zero capacitor C20 are grounded, and a second end of the second zero capacitor C20 is connected with a voltage VCC;
as an embodiment of the present invention, the power supply circuit includes a first power supply circuit, a second power supply circuit, and a third power supply circuit; the first power supply circuit comprises a first zero processor U10 for converting a 24V voltage into a 12V voltage; the second power supply circuit comprises a first two-processor U12 for converting 12V voltage into 5V voltage; the third power circuit includes a first processor U11 for converting a 5V voltage to a 3.3V voltage.
According to another aspect of the utility model, the following technical scheme is adopted: a method of pressure testing a hydraulic switch machine, the method of pressure testing comprising:
the pressure monitoring terminal is arranged at a set position of the hydraulic switch machine and monitors the action pressure data corresponding to the hydraulic switch machine;
the host computer obtains the action pressure data of the corresponding hydraulic switch machine monitored by each pressure monitoring terminal, and obtains the state of each hydraulic switch machine according to the action pressure data obtained by each pressure monitoring terminal.
As an embodiment of the utility model, the CT transformer converts the current of the switch machine into a low-voltage signal; the CT transformer sends the acquired low-voltage signal to a signal conditioning circuit, and the signal conditioning circuit performs signal conditioning on the received low-voltage signal;
the pressure sensor senses an oil pressure signal of the hydraulic point switch, the sensed oil pressure signal is sent to the amplifier for signal amplification, the amplifier sends the amplified signal to the active filter, and the active filter performs active filtering on the received signal; the active filter sends the acquired oil pressure signal to the signal conditioning circuit, and the signal conditioning circuit performs signal conditioning on the received oil pressure signal;
the signal conditioning circuit sends the conditioned signal to an analog-to-digital conversion circuit, and the analog-to-digital conversion circuit converts the received analog signal into a digital signal;
the analog-to-digital conversion circuit sends the converted digital signal to the MCU;
the trigger circuit sends a trigger signal to the MCU;
and the WDT supervision timer sends the WDT supervision timing signal to the MCU.
The utility model has the beneficial effects that: the pressure testing system of the hydraulic switch machine can conveniently test the hydraulic pressure of the hydraulic switch machine, can analyze the pressure transformation trend of the hydraulic switch machine and passes the maintenance efficiency of the switch machine.
The utility model solves the problems existing in the pressure maintenance test of the hydraulic switch machine, changes the fault maintenance to the state maintenance, adjusts the manual test into the intelligent test, reduces the maintenance pressure, improves the equipment maintenance quality, reduces the labor intensity, improves the production efficiency, and reduces the influence of the equipment maintenance on the traveling crane to become an important subject of the electric service maintenance work.
Drawings
Fig. 1 is a schematic diagram of the components of a pressure testing system of a hydraulic switch machine according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of the components of a pressure testing system of a hydraulic switch machine according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a pressure monitoring terminal according to an embodiment of the present invention.
Fig. 4 is a schematic diagram illustrating a pressure sensing module according to an embodiment of the utility model.
Fig. 5 is a schematic diagram illustrating the pressure sensing principle according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of a communication principle of an indoor communication extension in an embodiment of the present invention.
Fig. 7 is a circuit diagram of a data acquisition conversion circuit according to an embodiment of the utility model.
Fig. 8 is a circuit diagram of a control circuit according to an embodiment of the utility model.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
For a further understanding of the utility model, reference will now be made to the preferred embodiments of the utility model by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the utility model, and not to limit the scope of the claims.
The description in this section is for several exemplary embodiments only, and the present invention is not limited only to the scope of the embodiments described. It is within the scope of the present disclosure and protection that the same or similar prior art means and some features of the embodiments may be interchanged.
The steps in the embodiments in the specification are only expressed for convenience of description, and the implementation manner of the present application is not limited by the order of implementation of the steps. The term "connected" in the specification includes both direct connection and indirect connection.
The utility model discloses a pressure testing system of a hydraulic switch machine, and fig. 1 and 2 are schematic composition diagrams of the pressure testing system of the hydraulic switch machine in an embodiment of the utility model; referring to fig. 1 and 2, the pressure testing system includes: the system comprises a host 1 and at least one pressure monitoring terminal 2, wherein the host 1 is connected with each pressure monitoring terminal 2 respectively. The pressure monitoring terminal 2 is arranged at a set position of the hydraulic switch machine and used for monitoring action pressure data corresponding to the hydraulic switch machine; the host 1 acquires the action pressure data of the corresponding hydraulic switch machine monitored by each pressure monitoring terminal 2, and acquires the state of each hydraulic switch machine according to the action pressure data acquired by each pressure monitoring terminal.
The hydraulic switch machine pressure testing system is divided into two structures according to different data transmission modes, wherein one structure is an online system (shown in figure 1), and the other structure is an offline system (shown in figure 2) so as to adapt to different environment installation.
For monitoring points with cable channels or cable laying conditions, an online structure is adopted for increasing the real-time performance of a hydraulic switch machine detection chamber, pressure data tested during the operation of a turnout can be transmitted back to the chamber through the cable channels in real time, and the working state of the switch machine is obtained through the analysis of the data.
For the occasions without cable channels and inconvenient for laying cables, an off-line structure can be adopted, pressure data tested during turnout operation are stored in a test terminal, and after data stored in the test terminal are read on site by using a handheld data acquisition unit regularly, the data are uploaded to the indoor for analysis, and the working state of the point switch is judged.
In an embodiment of the present invention, the pressure monitoring terminal 2 includes: the system comprises an MCU (microprogrammed control Unit) microcontroller 21, a CT (computed tomography) transformer 22, a pressure sensing module 23, a signal conditioning circuit 24, an analog-to-digital conversion circuit 25, a trigger circuit 26, a WDT (Wireless data transfer) supervision timer 27, a communication module 28 and a power management circuit 29.
The MCU microcontroller 21 is respectively connected with the CT transformer 22, the pressure sensing module 23, the signal conditioning circuit 24, the analog-to-digital conversion circuit 25, the trigger circuit 26, the WDT supervision timer 27, the communication module 28, the power management circuit 29 and the battery 20. The MCU microcontroller 21 is communicated with the host 1 through a communication module 28, and a power management circuit 29 is connected with the battery 20; the battery 20 is respectively connected with the MCU microcontroller 21, the CT transformer 22, the pressure sensing module 23, the signal conditioning circuit 24, the analog-to-digital conversion circuit 25, the trigger circuit 26, the WDT supervision timer 27 and the communication module 28, and provides electric energy required by the operation of each module.
The input end of the CT transformer 22 is connected to the output end of the switch machine motor for converting the switch machine current into a low voltage signal. The output end of the CT transformer 22 is connected to the input end of the signal conditioning circuit 24, and is used for sending the acquired low-voltage signal to the signal conditioning circuit 24; the signal conditioning circuit 24 is configured to perform signal conditioning on the received low voltage signal.
The pressure sensing module 23 comprises a pressure sensor 231, an amplifier 232 and an active filter 233 which are connected in sequence; the pressure sensor 231 is used for sensing an oil pressure signal of the hydraulic switch machine, and the output end of the pressure sensor 231 is connected with the input end of the amplifier 232, and sends the sensed oil pressure signal to the amplifier 232 for signal amplification; the output end of the amplifier 232 is connected to the input end of the active filter 233, and is used for sending the amplified signal to the active filter 233; the active filter 233 is used to actively filter the received signal.
The output end of the pressure sensing module 23 is connected with the input end of the signal conditioning circuit 24, and is used for sending the acquired oil pressure signal to the signal conditioning circuit 24; the signal conditioning circuit 24 is used for performing signal conditioning on the received oil pressure signal.
The output end of the signal conditioning circuit 24 is connected to the input end of the digital-to-analog conversion circuit 25, and is used for sending the conditioned signal to the analog-to-digital conversion circuit 25; the analog-to-digital conversion circuit 25 is configured to convert the received analog signal into a digital signal.
The output end of the analog-to-digital conversion circuit 25 is connected to the input end of the MCU microcontroller 21, and is configured to transmit the converted digital signal to the MCU microcontroller 21.
The output end of the trigger circuit 26 is connected to the input end of the MCU microcontroller 21, and is configured to send a trigger signal to the MCU microcontroller 21.
The output end of the WDT supervision timer 27 is connected to the input end of the MCU microcontroller 21, and is configured to send a WDT supervision timing signal to the MCU microcontroller 21.
The intelligent pressure test terminal of the hydraulic switch machine is designed to record the change of the action pressure in each turnout switching process in real time, so that first hand data is provided for maintenance work to analyze the working state of the switch machine. Meanwhile, the intelligent pressure test terminal of the hydraulic switch machine is required to display a pressure value in real time, a signal worker can obtain pressure data without carrying any pressure test instrument to adjust the switch machine, so that the working strength of the signal worker is reduced, the maintenance time is shortened, the accuracy of pressure adjustment of the hydraulic switch machine is improved, and the efficiency of railway transportation is improved.
FIG. 5 is a schematic diagram of the pressure sensing principle according to an embodiment of the present invention; referring to fig. 5, in a usage scenario of the present invention, the core of the voltage measuring module is a low power consumption MCU. The interface of the system and the point switch comprises a motor current sampling module, a positioning oil pressure sampling module and a reverse oil pressure sampling module. The motor current sampling samples the motor current of the switch machine into a low-voltage signal through a CT (computed tomography) mutual inductor, realizes the electrical isolation of the switch machine motor and a measuring box, and ensures that the measuring box does not influence the action of the switch machine; the current sampling signal is sent to a trigger circuit through rectification, filtering and pulse shaping to form a switch machine starting signal, an external event of the MCU is driven to be interrupted, the pressure of the oil cylinder is measured, and the MCU samples once every 40 ms. The positioning oil pressure sampling circuit and the inversion oil pressure sampling circuit are the same and are composed of a pressure sensor, an instrument amplifier and an active filter. The pressure sensor is installed in the oil circuit of the switch machine, can output a voltage signal which is in linear proportion to the pressure of the oil cylinder, the signal is differential voltage of mV level, the differential voltage is sent to an instrumentation amplifier to be amplified to a proper amplitude and converted into a voltage signal of a single end to the ground, a high-frequency interference component is filtered by an active low pass filter LPF, analog-digital conversion processing is carried out by an ADC (analog-to-digital converter) which is arranged in the MCU, then the current pressure value is calculated, and the current pressure value is sequentially stored in different areas of an FLASH memory.
In order to adjust the overflow pressure of the point switch on site conveniently, the measuring terminal is provided with a 3-bit LED nixie tube display. The nixie tube is extinguished at ordinary times to reduce power consumption of the power supply. When the 'display' key is pressed, the nixie tube circuit is started. In the conversion process of the point switch, the nixie tube always displays the pressure of the oil way, and can replace the currently used mechanical pressure gauge.
The IrDA interface is used for being connected with a handheld data acquisition unit and can upload pressure data through infrared rays. The RS232 interface is used as a backup interface so as to read historical data from the test terminal when other interfaces of the test box fail.
The DC-DC converter provides the required stable operating voltage for the whole system. For off-line type, considering the principle of electrical isolation, the power supply adopts a disposable lithium-thionyl chloride (Li-SOCL2) high-energy density battery, which has high requirement on the efficiency of the power supply DC-DC converter, and the system adopts a switching voltage reduction and voltage stabilization circuit with the efficiency as high as 98% to supply power for each part of circuits. All modules of the system are in a dormant state when the switch machine is not started so as to reduce power consumption as much as possible.
In addition, a WDT supervision timer device is arranged in the system, so that program run-off or deadlock of the microcontroller in an interference environment can be prevented, and the stability of the system is improved.
Fig. 6 is a schematic diagram of a communication principle of an indoor communication extension in an embodiment of the present invention; referring to fig. 6, in an embodiment of the present invention, the indoor communication extension is installed in a signal machine room, and a 19-inch 3U chassis is used to provide a path of CAN communication port for connecting to a railway signal microcomputer monitoring CAN network. According to the relevant regulations of signal microcomputer monitoring, the CAN ports of the extension set are isolated by using photoelectricity so as to ensure the safety and reliability of a CAN network. The communication extension also provides two paths of field bus interfaces which are respectively communicated with intelligent terminals distributed in each switch machine through an upper cable core wire and a lower cable core wire of an outdoor cable.
The pressure monitoring terminal 2 comprises a data acquisition and conversion circuit. FIG. 7 is a schematic circuit diagram of a data acquisition conversion circuit according to an embodiment of the present invention; referring to fig. 7, in an embodiment of the utility model, the data acquisition and conversion circuit includes a plurality of sets of data acquisition and conversion units, each of which includes a first chip IC1, a sixth chip IC6, a plurality of diodes, and a plurality of resistors.
A first pin of the first chip IC1 is respectively connected with the cathode of a first diode D1 and a first end of a first resistor R1; the second pin of the first chip IC1 is connected with the second pin of a sixth chip IC 6;
a third pin of the first chip IC1 is respectively connected to a cathode of a third diode D3 and a first end of a third resistor R3; the fourth pin of the first chip IC1 is connected with the fifth pin of a sixth chip IC 6;
a fifth pin of the first chip IC1 is respectively connected to a cathode of a fourth diode D4 and a first end of a third resistor R4; the sixth pin of the first chip IC1 is connected with the sixth pin of a sixth chip IC 6; a seventh pin (VSS pin) of the first chip IC1 is connected to a seventh pin (VSS pin) of a sixth chip IC 6;
the eighth pin of the first chip IC1 is connected with the first pin of a sixth chip IC 6;
a ninth pin of the first chip IC1 is respectively connected to a cathode of the second diode D2 and a first end of the second resistor R2; the first zero pin of the first chip IC1 is connected with the first third pin of a sixth chip IC 6;
a first pin of the first chip IC1 is respectively connected with a cathode of a sixth diode D6 and a first end of a sixth resistor R6; the first two pins of the first chip IC1 are connected with the first two pins of a sixth chip IC 6;
a first third pin of the first chip IC1 is respectively connected to a cathode of a fifth diode D5 and a first end of a fifth resistor R5; the first four pins (VDD pins) of the first chip IC1 are connected with the first four pins (VDD pins) of the sixth chip IC 6;
a third pin of the sixth chip IC6 is connected to the first LED through a third resistor R31; a fourth pin of the sixth chip IC6 is connected with a second LED through a third resistor R32;
a first pin of the sixth chip IC6 is connected with a third LED through a third resistor R33; a first zero pin of the sixth chip IC6 is connected with a fourth LED through a third fourth resistor R34;
the pressure monitoring terminal 2 includes a control circuit. FIG. 8 is a circuit diagram of a control circuit according to an embodiment of the present invention; referring to fig. 8, in an embodiment of the present invention, the control circuit includes a main control circuit, a plurality of data acquisition circuits, a communication circuit, and a power circuit. The main control circuit is respectively connected with each data acquisition circuit and the communication circuit, and the power supply circuit provides electric energy required by work for the main control circuit, each data acquisition circuit and the communication circuit.
The master control circuitry includes an eighth processor U8 and peripheral circuitry.
The data acquisition circuit comprises a second processor U2, a plurality of capacitors and a plurality of resistors;
a sixth pin (V + pin) of the second processor U2 is connected with a power supply VCC, and a first pin (CDIS pin) of the second processor U2 is connected with a first pin of an eighth processor U8;
a fourth pin (VIN pin) of the second processor U2 is connected with a second end of a sixth resistor R6; a first end of the sixth resistor R6 is connected to a fifth pin (VO1 pin) of the second processor U2 and a second end of the first fifth capacitor C15, respectively;
a third pin (a PC1 pin) of the second processor U2 is connected with a first end of a second capacitor C2, and a second pin (a PC2 pin) of the second processor U2 is connected with a first end of a third capacitor C3; a seventh pin (V-pin) of the second processor U2, a second end of a second capacitor C2, a second end of a third capacitor C3, and a first end of a second zero capacitor C20 are grounded, and a second end of the second zero capacitor C20 is connected with a voltage VCC;
the communication circuitry includes a first processor U1 and peripheral circuitry.
The power supply circuit comprises a first power supply circuit, a second power supply circuit and a third power supply circuit; the first power supply circuit comprises a first zero processor U10 for converting a 24V voltage into a 12V voltage; the second power supply circuit comprises a first two-processor U12 for converting 12V voltage into 5V voltage; the third power circuit includes a first processor U11 for converting a 5V voltage to a 3.3V voltage.
The utility model further discloses a pressure testing method of the hydraulic switch machine, which comprises the following steps: the pressure monitoring terminal is arranged at a set position of the hydraulic switch machine and monitors the action pressure data corresponding to the hydraulic switch machine; the host computer obtains the action pressure data of the corresponding hydraulic switch machine monitored by each pressure monitoring terminal, and obtains the state of each hydraulic switch machine according to the action pressure data obtained by each pressure monitoring terminal.
In an embodiment of the present invention, the step of the pressure monitoring terminal monitoring the action pressure data of the corresponding hydraulic switch machine specifically includes:
the CT transformer converts the current of the switch machine into a low-voltage signal; the CT transformer sends the acquired low-voltage signal to a signal conditioning circuit, and the signal conditioning circuit performs signal conditioning on the received low-voltage signal;
the pressure sensor senses an oil pressure signal of the hydraulic point switch, the sensed oil pressure signal is sent to the amplifier for signal amplification, the amplifier sends the amplified signal to the active filter, and the active filter performs active filtering on the received signal; the active filter sends the acquired oil pressure signal to the signal conditioning circuit, and the signal conditioning circuit performs signal conditioning on the received oil pressure signal;
the signal conditioning circuit sends the conditioned signal to an analog-to-digital conversion circuit, and the analog-to-digital conversion circuit converts the received analog signal into a digital signal;
the analog-to-digital conversion circuit sends the converted digital signal to the MCU; the trigger circuit sends a trigger signal to the MCU; and the WDT supervision timer sends the WDT supervision timing signal to the MCU.
In summary, the hydraulic switch machine pressure testing system provided by the utility model can conveniently test the hydraulic pressure of the hydraulic switch machine, can analyze the pressure transformation trend of the hydraulic switch machine, and passes the maintenance efficiency of the switch machine.
The utility model solves the problems existing in the pressure maintenance test of the hydraulic switch machine, changes the fault maintenance to the state maintenance, adjusts the manual test into the intelligent test, reduces the maintenance pressure, improves the equipment maintenance quality, reduces the labor intensity, improves the production efficiency, and reduces the influence of the equipment maintenance on the traveling crane to become an important subject of the electric service maintenance work.
The beneficial effects of the utility model include:
1. fully electrically isolated and not electrically connected to the switch circuit. The only connection of the test terminal and the switch circuit is realized through a mutual inductor, thus realizing the electrical isolation.
2. A plurality of data transmission modes are provided. Two data acquisition modes are designed, and the device can be suitable for different occasions.
3. And displaying the pressure value in real time. Need not to use traditional manometer, reduce maintenance duration greatly, be favorable to improving maintenance efficiency.
4. The testing device is small in size and convenient to install. The installation of the test terminal can be finished in a short time by only using some simple common tools, and the construction is simple.
5. And the working state monitoring of the hydraulic switch machine is realized. Through the analysis to switch operating pressure data, can obtain the change trend of switch pressure to know the maintenance work of hydraulic switch machine, be favorable to guaranteeing the reliable and stable work of switch machine.
It should be noted that the present application may be implemented in software and/or a combination of software and hardware; for example, it may be implemented using Application Specific Integrated Circuits (ASICs), general purpose computers, or any other similar hardware devices. In some embodiments, the software programs of the present application may be executed by a processor to implement the above steps or functions. As such, the software programs (including associated data structures) of the present application can be stored in a computer-readable recording medium; such as RAM memory, magnetic or optical drives or diskettes, and the like. In addition, some steps or functions of the present application may be implemented using hardware; for example, as circuitry that cooperates with the processor to perform various steps or functions.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The description and applications of the utility model herein are illustrative and are not intended to limit the scope of the utility model to the embodiments described above. Effects or advantages referred to in the embodiments may not be reflected in the embodiments due to interference of various factors, and the description of the effects or advantages is not intended to limit the embodiments. Variations and modifications of the embodiments disclosed herein are possible, and alternative and equivalent various components of the embodiments will be apparent to those skilled in the art. It will be clear to those skilled in the art that the present invention may be embodied in other forms, structures, arrangements, proportions, and with other components, materials, and parts, without departing from the spirit or essential characteristics thereof. Other variations and modifications of the embodiments disclosed herein may be made without departing from the scope and spirit of the utility model.
Claims (6)
1. A hydraulic switch machine pressure test system, characterized in that it comprises: the system comprises a host and at least one pressure monitoring terminal, wherein the host is connected with each pressure monitoring terminal;
the pressure monitoring terminal is arranged at a set position of the hydraulic switch machine and used for monitoring action pressure data corresponding to the hydraulic switch machine;
the host computer obtains the action pressure data of the corresponding hydraulic switch machine monitored by each pressure monitoring terminal, and obtains the state of each hydraulic switch machine according to the action pressure data obtained by each pressure monitoring terminal.
2. The hydraulic switch machine pressure testing system of claim 1, characterized in that:
the pressure monitoring terminal includes: the system comprises an MCU (microprogrammed control unit) microcontroller, a CT (computed tomography) mutual inductor, a pressure sensing module, a signal conditioning circuit, an analog-to-digital conversion circuit, a trigger circuit, a WDT (wireless data transmission) supervision timer, a communication module and a power management circuit;
the MCU microcontroller is respectively connected with the CT mutual inductor, the pressure sensing module, the signal conditioning circuit, the analog-to-digital conversion circuit, the trigger circuit, the WDT supervision timer, the communication module and the power management circuit;
the input end of the CT transformer is connected with the output end of the switch machine motor and used for converting the current of the switch machine motor into a low-voltage signal;
the output end of the CT transformer is connected with the input end of the signal conditioning circuit and used for sending the acquired low-voltage signal to the signal conditioning circuit; the signal conditioning circuit is used for conditioning the received low-voltage signal;
the pressure sensing module comprises a pressure sensor, an amplifier and an active filter which are connected in sequence; the pressure sensor is used for sensing an oil pressure signal of the hydraulic switch machine, and the output end of the pressure sensor is connected with the input end of the amplifier and sends the sensed oil pressure signal to the amplifier for signal amplification; the output end of the amplifier is connected with the input end of the active filter and used for sending the amplified signal to the active filter; the active filter is used for carrying out active filtering on the received signal;
the output end of the pressure sensing module is connected with the input end of the signal conditioning circuit and used for sending the acquired oil pressure signal to the signal conditioning circuit; the signal conditioning circuit is used for performing signal conditioning on the received oil pressure signal;
the output end of the signal conditioning circuit is connected with the input end of the digital-to-analog conversion circuit and used for sending the conditioned signal to the analog-to-digital conversion circuit; the analog-to-digital conversion circuit is used for converting the received analog signals into digital signals;
the output end of the analog-to-digital conversion circuit is connected with the input end of the MCU microcontroller and used for transmitting the digital signal obtained by conversion to the MCU microcontroller;
the output end of the trigger circuit is connected with the input end of the MCU microcontroller and used for sending a trigger signal to the MCU microcontroller;
the output end of the WDT supervision timer is connected with the input end of the MCU microcontroller and used for sending WDT supervision timing signals to the MCU microcontroller.
3. The hydraulic switch machine pressure testing system of claim 1, characterized in that:
the pressure monitoring terminal comprises a data acquisition and conversion circuit, the data acquisition and conversion circuit comprises a plurality of data acquisition and conversion units, and each data acquisition and conversion unit comprises a first chip IC1, a sixth chip IC6, a plurality of diodes and a plurality of resistors;
a first pin of the first chip IC1 is respectively connected with the cathode of a first diode D1 and a first end of a first resistor R1; the second pin of the first chip IC1 is connected with the second pin of a sixth chip IC 6;
a third pin of the first chip IC1 is respectively connected to a cathode of a third diode D3 and a first end of a third resistor R3; the fourth pin of the first chip IC1 is connected with the fifth pin of a sixth chip IC 6;
a fifth pin of the first chip IC1 is respectively connected to a cathode of a fourth diode D4 and a first end of a third resistor R4; the sixth pin of the first chip IC1 is connected with the sixth pin of a sixth chip IC 6; a seventh pin VSS pin of the first chip IC1 is connected with a seventh pin VSS pin of a sixth chip IC 6;
the eighth pin of the first chip IC1 is connected with the first pin of a sixth chip IC 6;
a ninth pin of the first chip IC1 is respectively connected to a cathode of the second diode D2 and a first end of the second resistor R2; the first zero pin of the first chip IC1 is connected with the first third pin of a sixth chip IC 6;
a first pin of the first chip IC1 is respectively connected with a cathode of a sixth diode D6 and a first end of a sixth resistor R6; the first two pins of the first chip IC1 are connected with the first two pins of a sixth chip IC 6;
a first third pin of the first chip IC1 is respectively connected to a cathode of a fifth diode D5 and a first end of a fifth resistor R5; the first four-pin VDD pin of the first chip IC1 is connected with the first four-pin VDD pin of a sixth chip IC 6;
a third pin of the sixth chip IC6 is connected to the first LED through a third resistor R31; a fourth pin of the sixth chip IC6 is connected with a second LED through a third resistor R32;
a first pin of the sixth chip IC6 is connected with a third LED through a third resistor R33; the first zero pin of the sixth chip IC6 is connected to the fourth LED through a third fourth resistor R34.
4. The hydraulic switch machine pressure testing system of claim 1, characterized in that:
the pressure monitoring terminal comprises a control circuit, wherein the control circuit comprises a main control circuit, a plurality of data acquisition circuits, a communication circuit and a power supply circuit; the main control circuit is respectively connected with each data acquisition circuit and the communication circuit, and the power supply circuit provides electric energy required by work for the main control circuit, each data acquisition circuit and the communication circuit.
5. The hydraulic switch machine pressure testing system of claim 4, characterized in that:
the data acquisition circuit comprises a second processor U2, a plurality of capacitors and a plurality of resistors;
a sixth pin V + of the second processor U2 is connected with a power supply VCC, and a first pin CDIS of the second processor U2 is connected with a first pin of the eighth processor U8;
a fourth pin VIN of the second processor U2 is connected with a second end of a sixth resistor R6; a first end of the sixth resistor R6 is connected to the fifth pin VO1 of the second processor U2 and a second end of the first fifth capacitor C15, respectively;
a third pin PC1 of the second processor U2 is connected with a first end of a second capacitor C2, and a second pin PC2 of the second processor U2 is connected with a first end of a third capacitor C3; a seventh pin V-pin of the second processor U2, a second end of the second capacitor C2, a second end of the third capacitor C3, and a first end of the second zero capacitor C20 are grounded, and a second end of the second zero capacitor C20 is connected to the voltage VCC.
6. The hydraulic switch machine pressure testing system of claim 4, characterized in that:
the power supply circuit comprises a first power supply circuit, a second power supply circuit and a third power supply circuit; the first power supply circuit comprises a first zero processor U10 for converting a 24V voltage into a 12V voltage; the second power supply circuit comprises a first two-processor U12 for converting 12V voltage into 5V voltage; the third power circuit includes a first processor U11 for converting a 5V voltage to a 3.3V voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122743587.3U CN216410482U (en) | 2021-11-10 | 2021-11-10 | Pressure testing system of hydraulic switch machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122743587.3U CN216410482U (en) | 2021-11-10 | 2021-11-10 | Pressure testing system of hydraulic switch machine |
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| Publication Number | Publication Date |
|---|---|
| CN216410482U true CN216410482U (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122743587.3U Active CN216410482U (en) | 2021-11-10 | 2021-11-10 | Pressure testing system of hydraulic switch machine |
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| Country | Link |
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| CN (1) | CN216410482U (en) |
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2021
- 2021-11-10 CN CN202122743587.3U patent/CN216410482U/en active Active
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