CN210270114U - Fault detector for heavy-duty mechanized bridge erection system - Google Patents
Fault detector for heavy-duty mechanized bridge erection system Download PDFInfo
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- CN210270114U CN210270114U CN201920741503.2U CN201920741503U CN210270114U CN 210270114 U CN210270114 U CN 210270114U CN 201920741503 U CN201920741503 U CN 201920741503U CN 210270114 U CN210270114 U CN 210270114U
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Abstract
The utility model discloses a be used for heavy mechanized bridge system fault detector that erects, detect boat socket, sensor data acquisition boat socket, video interface, the joint that charges, touch-sensitive screen, industrial computer, next quick-witted data acquisition processing system, power module, trinity sensor and loading valve including power indicator, organism, switch, liquid crystal display, handle, brightness adjusting switch, USB interface, vehicle mounted power supply. The utility model discloses the reliability is high, the interference killing feature is strong, can carry out on-line measuring to heavy mechanized bridge erection system state, and the detection parameter scope is wide.
Description
Technical Field
The utility model belongs to the technical field of the fault detection and diagnosis, concretely relates to heavy mechanized bridge erection system fault detection appearance.
Background
The heavy mechanized bridge is important novel bridge equipment in our army, and has an important function of ensuring that large-scale equipment in our army rapidly crosses barriers such as rivers, ditches and the like.
The technical states of a hydraulic system, an electric control system and a pneumatic system of the heavy-duty mechanical bridge are detected, and effective fault diagnosis and quick repair are important ways for ensuring normal and stable work of the heavy-duty mechanical bridge and improving the maintenance and guarantee capability of field personnel.
Because the heavy-duty mechanical bridge comprises various systems such as machinery, hydraulic pressure, pneumatic power, electric power and the like, how to detect the technical state of the heavy-duty mechanical bridge and carry out effective fault diagnosis and quick repair is a difficult problem in equipment guarantee. Therefore, the simple and practical technical state detection system or instrument has important significance for solving the problems of detection during army training and battle and rush repair during battle. Therefore, aiming at the technical characteristics of the existing heavy mechanical bridge, a technical state detection instrument urgently needed by field operations rush repair is researched so as to meet the detection and fault diagnosis needs of hydraulic, electric and other erection systems of the heavy mechanical bridge under the field operations.
At present, the foreign testing and analysis technology level is high, but the complete automatic diagnosis aiming at a certain complex system is still rarely applied in practice. China carries out system detection and fault diagnosis by applying computer technology later, and particularly, the application research of equipment in our army is in a development stage. In recent years, a great deal of theoretical and experimental research is carried out on electronic monitoring, remote control and fault diagnosis systems of heavy-duty mechanized bridges by a plurality of domestic scientific research institutions and universities such as the liberty military university and the like, for example, research on GQL110A type heavy-duty mechanized bridge electrical system detection and fault diagnosis technology, portable heavy-duty mechanized bridge fault diagnosis instrument, GQL110A type heavy-duty mechanized bridge detection and fault diagnosis system and the like provides a set of device for detecting and diagnosing the non-disassembly of the heavy-duty mechanized bridge, and the device can be used for rapidly and accurately detecting the faults of an 84A heavy-duty mechanized bridge electric control system, a pneumatic system and a hydraulic system on site so as to determine repair positions and repair time. However, relevant reports on detection and diagnosis instruments and equipment of heavy mechanical bridge working devices are not found.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a portable heavy mechanized bridge erection system fault detector.
Realize the utility model discloses the technical solution of purpose does: a fault detector for a heavy-duty mechanical bridge erection system comprises a power indicator, a machine body, a power switch, a liquid crystal display screen, a handle, a brightness adjusting switch, a USB interface, a vehicle-mounted power detection navigation socket, a mobile control box detection navigation socket, a sensor data acquisition navigation socket, a video interface, a charging connector, a touch screen, an industrial personal computer, a lower computer data acquisition processing system, a power module, a three-in-one sensor and a loading valve;
the power indicator is used for displaying the electric quantity of the storage battery; the machine body is an external box body of the detector; the power switch is used for switching on and off the detector; the liquid crystal display screen is used for displaying the operation steps, the measured system parameters and the fault maintenance scheme; the handle is arranged outside the shell; the brightness adjusting switch is used for adjusting the display brightness of the screen; the USB interface is used for connecting external equipment; the vehicle-mounted power supply detection navigation socket is used for collecting voltage signals of a vehicle-mounted power supply; the mobile control box detection navigation socket is used for mobile control box signal acquisition; the sensor data acquisition aviation plug is used for acquiring temperature, pressure and flow signals of a hydraulic system; the video interface is externally connected with a VGA wire; the charging connector is used for charging the storage battery; the touch screen is used for interface operation of the detector; the lower computer data acquisition processing system converts the acquired signals such as pressure, temperature, flow and the like into digital signals and transmits the digital signals to the industrial personal computer; the power supply module provides power for the detector; the three-in-one sensor realizes the data acquisition function of the detector; and the loading valve adjusts the pressure of the hydraulic system according to the detection requirement.
Compared with the prior art, the utility model discloses a show the advantage and do: (1) the utility model has high reliability, accurate detection, light volume and convenient operation and carrying; (2) the on-line detection can be carried out on the state of the erection system, the technical state parameters of the collected hydraulic and electric control systems are displayed in real time in an LCD (liquid crystal display) mode, and whether the system is normal or not is judged more intuitively; (3) the installation and the movement are convenient, the data maintenance is simple and convenient, and the expansibility is good; (4) the utility model discloses a reserve high performance lithium cell ensures that the technical state parameter of equipment measures comprehensively.
Drawings
Fig. 1 is a front view of a fault detector of a heavy-duty mechanized bridge erection system.
Fig. 2 is a left view of a fault detector of the heavy-duty mechanized bridge erection system.
Fig. 3 is a schematic view of the working principle of the fault detector of the heavy-duty mechanized bridge erection system.
FIG. 4 is a structural diagram of a fault detector of a heavy-duty mechanized bridge erection system.
Detailed Description
As shown in fig. 1 and fig. 2, a fault detection device for detecting a hydraulic system, an electric control system and a pneumatic system of a heavy-duty mechanical bridge by using a single-chip microcomputer technology comprises a power indicator lamp 1, a machine body 2, a power switch 3, a liquid crystal display 4, a handle 5, a brightness adjusting switch 6, a USB interface 7, a vehicle-mounted power detection navigation socket 8, a mobile control box detection navigation socket 9, a sensor data acquisition navigation socket 10, a video interface 11, a charging connector 12, a touch screen 13, an industrial personal computer 14, a lower computer data acquisition processing system 15, a power module 16, a three-in-one sensor, a loading valve, a special connector, an oil pipe and a test cable.
The power indicator lamp 1, the power switch 3 and the liquid crystal display screen 4 are arranged on the machine body 2, and the handle 5, the brightness adjusting switch 6, the USB interface 7, the vehicle-mounted power supply detection navigation socket 8, the mobile control box detection navigation socket 9, the sensor data acquisition navigation socket 10, the video interface 11 and the charging connector 12 are arranged on the side face of the machine body 2; the power indicator lamp 1 is used for displaying the electric quantity of the storage battery; the machine body 2 is an external box body of the detector; the power switch 3 is used for turning on and off the detector; the liquid crystal display screen 4 is used for displaying the operation steps, the measured system parameters and the fault maintenance scheme; the handle 5 is used for carrying the detector; the brightness adjusting switch 6 is used for adjusting the display brightness of the screen; the USB interface 7 is used for externally connecting peripheral equipment such as a keyboard, a mouse and the like; the vehicle-mounted power supply detection navigation socket 8 is used for collecting voltage signals of a vehicle-mounted power supply; the mobile control box detection navigation socket 9 is used for mobile control box signal acquisition; the sensor data acquisition navigation socket 10 is used for acquiring signals such as temperature, pressure, flow and the like of a hydraulic system; the video interface 11 can be externally connected with a VGA wire; the charging connector 12 is used for charging the storage battery; the touch screen 13 is used for interface operation of the detector; the industrial personal computer 14 is a main control core unit of the detector; the lower computer data acquisition and processing system 15 analyzes and processes the data acquired by each sensor, and is a main information acquisition and processing platform of the whole detection system; the power module 16 provides power for the detector; the three-in-one sensor realizes the data acquisition function of the detector; the loading valve realizes the pressure building function of the hydraulic system; the special joint and the oil pipe can connect the three-in-one sensor into the hydraulic system; the test cable is a connecting cable of the detector, the mobile control box, the three-in-one sensor and the vehicle-mounted power supply. As shown in fig. 3, the device is connected with a measured object through a special joint, a special oil pipe and a connecting cable, signals such as oil pressure, temperature, flow and voltage of the measured object are collected by a sensor and then transmitted to a lower computer signal collecting and processing system, the lower computer signal collecting and processing system converts signals such as pressure, temperature and flow of a hydraulic system into digital signals and transmits the digital signals to an upper computer system, an industrial personal computer processes the signals and then displays the digital signals on a display screen, and fault location and diagnosis of the hydraulic system are performed after a measured value is compared with a standard value.
The three-in-one sensor comprises a TPP temperature sensor, a PTT pressure sensor and a CT turbine flow sensor. The three-in-one sensor simultaneously and simultaneously detects the temperature, the pressure and the flow of the hydraulic system at the same point.
The sensor data acquisition aviation socket adopts a 41-core aviation socket and is used for connecting the detector and the sensor; the detection aerial socket of the movable control box adopts a 41-core aerial socket which is used for connecting the detector with the movable control box; the power supply detection aviation socket adopts a 15-core aviation socket and is used for connecting the detector with a vehicle-mounted power supply.
As shown in fig. 4, the lower computer signal acquisition and processing system includes a C8051F020 single chip microcomputer, an oil pressure signal conditioning circuit, an oil temperature signal conditioning circuit, a flow signal conditioning circuit, a 5V switching value conditioning circuit, a 24V switching value conditioning circuit, a first relay control circuit, a second relay control circuit, a third relay control circuit, a fourth relay control circuit, an LCD display circuit, a power supply circuit, a clock circuit, a JTAG circuit, a serial communication circuit, a reset circuit, and a power supply detection conditioning circuit;
the oil pressure signal conditioning circuit, the oil temperature signal conditioning circuit, the flow signal conditioning circuit, the 5V switching value conditioning circuit, the 24V switching value conditioning circuit, the first relay control circuit, the second relay control circuit, the third relay control circuit, the fourth relay control circuit, the LCD display circuit, the power supply circuit, the clock circuit, the JTAG circuit, the serial port communication circuit, the reset circuit and the power supply detection conditioning circuit are all connected with the C8051F020 single chip microcomputer;
the oil pressure signal conditioning circuit converts the collected oil pressure signal into a digital signal and transmits the digital signal to the singlechip; the oil temperature signal conditioning circuit converts the acquired oil temperature signal into a digital signal and transmits the digital signal to the singlechip; the flow signal conditioning circuit converts the acquired flow signal into a digital signal and transmits the digital signal to the singlechip; the 5V switching value conditioning circuit conditions and converts an input 5V switching value signal into a signal which can be identified by a singlechip; the 24V switching value conditioning circuit is used for conditioning and converting an input 24V switching value signal into a signal which can be identified by a single chip microcomputer by adopting a photoelectric isolation technology; the first relay control circuit outputs 24V voltage to drive a switch and an indicator light which need 24V voltage on the movable operation box; the second relay control circuit outputs 5V voltage to drive a switch which needs 5V voltage on the movable operation box; the third relay control circuit outputs 5V voltage to drive an alarm lamp; the fourth relay control circuit outputs 5V voltage to drive the buzzer; the liquid crystal display circuit is used for displaying oil pressure, oil temperature and flow information; the power circuit adopts a rechargeable lithium battery to supply power to the system; the clock circuit is used for providing a system clock; the JTAG circuit is used for downloading the program of the single chip microcomputer; the serial port communication circuit is based on an RS232 serial bus communication mode, and data information exchange is carried out between an MAX232 chip and an industrial personal computer; the reset circuit is used for resetting the singlechip; the power supply detection conditioning circuit is used for conditioning and converting the vehicle-mounted power supply signal into a signal which can be identified by the singlechip.
The present invention will be described in detail with reference to the following examples.
Examples
As shown in fig. 1 and fig. 2, a fault detection device for detecting a hydraulic system, an electric control system and a pneumatic system of a heavy-duty mechanical bridge by using a single-chip microcomputer technology comprises a power indicator lamp 1, a machine body 2, a power switch 3, a liquid crystal display 4, a handle 5, a brightness adjusting switch 6, a USB interface 7, a vehicle-mounted power detection navigation socket 8, a mobile control box detection navigation socket 9, a sensor data acquisition navigation socket 10, a video interface 11, a charging connector 12, a touch screen 13, an industrial personal computer 14, a lower computer data acquisition processing system 15, a power module 16, a three-in-one sensor, a loading valve, a special connector, an oil pipe and a test cable.
As shown in fig. 4, the lower computer signal acquiring and processing system specifically includes: the device comprises a C8051F020 single chip microcomputer, an oil pressure signal conditioning circuit, an oil temperature signal conditioning circuit, a flow signal conditioning circuit, a 5V switching value conditioning circuit, a 24V switching value conditioning circuit, a first relay control circuit, a second relay control circuit, a third relay control circuit, a fourth relay control circuit, an LCD display circuit, a power supply circuit, a clock circuit, a JTAG circuit, a serial communication circuit, a reset circuit and a power supply detection conditioning circuit;
C8051F020 single-chip microcomputer: the utility model discloses a core information processing unit carries out information processing and conversion through various IO mouth and peripheral circuit.
Oil pressure signal conditioning circuit: the collected oil pressure signal is converted into a digital signal convenient for transmission and transmitted to the singlechip.
Oil temperature signal conditioning circuit: the collected oil temperature signal is converted into a digital signal convenient for transmission and transmitted to the singlechip.
The flow signal conditioning circuit: the collected flow signal is converted into a digital signal convenient for transmission and transmitted to the singlechip.
5V switching value conditioning circuit: and conditioning and converting the input 5V switching value signal into a signal which can be recognized by a singlechip.
24V switching value conditioning circuit: and the photoelectric isolation technology is adopted to condition and convert the input 24V switching value signal into a signal which can be recognized by a singlechip.
The first relay control circuit: and outputting 24V voltage to drive a switch and an indicator light which need 24V voltage on the movable operation box.
The second relay control circuit: 5V voltage is output to drive a switch which needs 5V voltage on the movable operation box.
The third relay control circuit: 5V voltage is output to drive an alarm lamp.
Fourth relay control circuit: and 5V voltage is output to drive the buzzer.
Liquid crystal display circuit: and displaying information such as oil pressure, oil temperature and flow.
A power supply circuit: the high-performance rechargeable lithium battery is adopted to supply power to the system, the LM2596T-5.0 chip is used to ensure stable and reliable operation of system voltage, and the unidirectional diode is designed to prevent reverse voltage and capacitors with large and small capacities from performing a filtering function, so that normal operation of the system is ensured.
A clock circuit: a system clock is provided.
JTAG circuit: and a single chip microcomputer program downloading circuit.
A serial port communication circuit: based on an RS232 serial bus communication mode, an MAX232 chip is used for exchanging data information with an industrial personal computer.
A reset circuit: and the reset circuit is used for resetting the singlechip.
The power supply detection conditioning circuit comprises: and conditioning and converting the vehicle-mounted power supply signal into a signal which can be identified by the singlechip.
A storage battery: a sealed lead-acid storage battery (with the capacity of 24V/7AH) is adopted to provide power supply guarantee for the detector.
Sensor data acquisition aviation socket: and a 41-core aviation socket is adopted to realize the connection of the detector and the sensor.
The mobile control box detection navigation socket: and a 41-core aviation socket is adopted to realize the connection of the detector and the movable operation box.
Power supply detection aviation socket: and a 15-core aviation socket is adopted to realize the connection of the detector and the vehicle-mounted power supply.
Special joint and oil pipe: and the physical connection of the three-in-one sensor and the hydraulic circuit is realized.
A three-in-one sensor: and simultaneously, parameters such as temperature, pressure, flow and the like of the hydraulic system are detected at the same point.
The sensor three-in-one sensor comprises a TPP temperature sensor, a PTT pressure sensor and a CT turbine flow sensor.
Loading a valve: and adjusting the pressure of the hydraulic system according to the detection requirement.
As shown in fig. 1 and 2, the working principle of the detector is as follows:
when the mobile control box is detected, the mobile control box detection socket is connected with the mobile control box through a test cable, a power switch is pressed down, and a single chip microcomputer in the detector controls the first relay control circuit and the second relay control circuit through detected switch signals to output 24V and 5V voltages to electrify the mobile control box. The switch on the mobile control box is pulled, a switch signal is directly transmitted to the single chip microcomputer through the signal conditioning circuit, the detection switch is clicked on the touch screen, and the single chip microcomputer processes received data and displays the data on the LCD screen. When detecting whether the indicator lamp on the movable control box breaks down, clicking the lamp detection switch, and the single chip microcomputer analyzes and processes the received data and displays the data on the LCD screen.
When the oil pressure of the hydraulic system is detected, the three-in-one sensor is connected into the hydraulic system to be detected by using the special joint and the oil pipe, the movable control box is operated according to the operation mode of erecting and withdrawing the bridge, the corresponding hydraulic oil pipe supplies oil, the PTT pressure sensor starts to collect the pressure of the hydraulic oil pipe, then the collected analog quantity is converted into digital quantity through the conditioning circuit and is conveyed to the single chip microcomputer, the oil pressure detection switch is pressed, and the single chip microcomputer processes the received parameters and displays the parameters on the LCD screen.
When the oil temperature of the hydraulic system is detected, the three-in-one sensor is connected into the hydraulic system to be detected by using the special connector and the oil pipe, the movable control box is operated according to the operation mode of erecting and withdrawing the bridge, so that the corresponding hydraulic oil pipe supplies oil, the TPP temperature sensor starts to acquire the temperature of the hydraulic oil pipe, then the acquired analog quantity is converted into digital quantity through the conditioning circuit and is transmitted to the single chip microcomputer, the temperature detection switch is pressed, and the single chip microcomputer processes the received parameters and displays the parameters on the LCD screen.
When the oil temperature of the hydraulic system is detected, the three-in-one sensor is connected into the hydraulic system to be detected by using the special connector and the oil pipe, the movable control box is operated according to the operation mode of erecting and withdrawing the bridge, so that the corresponding hydraulic oil pipe supplies oil, the CT turbine flow sensor starts to collect the flow of the hydraulic oil pipe, then the collected analog quantity is converted into digital quantity through the conditioning circuit and is conveyed to the single chip microcomputer, the flow detection switch is pressed, and the single chip microcomputer processes the received parameters and displays the parameters on the LCD screen.
When the vehicle-mounted power supply is detected, the power supply detection socket is connected with the vehicle-mounted power supply through the test cable, the vehicle-mounted power supply signal is converted into a digital signal through the signal conditioning circuit and is transmitted to the single chip microcomputer, the power supply detection switch is pressed down, and the single chip microcomputer processes received data and displays the data on the LCD screen.
When the detector cannot work normally, the singlechip directly controls the third relay control circuit and the fourth relay control circuit after the detector is powered on, and an alarm lamp and a buzzer on the detector give an alarm.
Claims (7)
1. A fault detector for a heavy mechanical bridge erection system is characterized by comprising a power indicator (1), a machine body (2), a power switch (3), a liquid crystal display (4), a handle (5), a brightness adjusting switch (6), a USB interface (7), a vehicle-mounted power detection navigation socket (8), a mobile control box detection navigation socket (9), a sensor data acquisition navigation socket (10), a video interface (11), a charging connector (12), a touch screen (13), an industrial personal computer (14), a lower computer data acquisition processing system (15), a power module (16), a three-in-one sensor and a loading valve;
the power indicator lamp (1), the power switch (3) and the liquid crystal display screen (4) are arranged on the machine body (2), and the handle (5), the brightness adjusting switch (6), the USB interface (7), the vehicle-mounted power detection navigation socket (8), the mobile control box detection navigation socket (9), the sensor data acquisition navigation socket (10), the video interface (11) and the charging connector (12) are arranged on the side face of the machine body (2); the power supply indicator lamp (1) is used for displaying the electric quantity of the storage battery; the machine body (2) is an external box body of the detector; the power switch (3) is used for turning on and off the detector; the liquid crystal display screen (4) is used for displaying the operation steps, the measured system parameters and the fault maintenance scheme; the handle (5) is arranged outside the shell; the brightness adjusting switch (6) is used for adjusting the display brightness of the screen; the USB interface (7) is used for connecting external equipment; the vehicle-mounted power supply detection navigation socket (8) is used for collecting voltage signals of a vehicle-mounted power supply; the mobile control box detection navigation socket (9) is used for acquiring signals of the mobile control box; the sensor data acquisition navigation socket (10) is used for acquiring temperature, pressure and flow signals of a hydraulic system; the video interface (11) is externally connected with a VGA wire; the charging connector (12) is used for charging the storage battery; the touch screen (13) is used for interface operation of the detector; the lower computer data acquisition processing system (15) converts the acquired signals such as signal pressure, temperature, flow and the like into digital signals and transmits the digital signals to the industrial personal computer (14); the power module (16) provides power for the detector; the three-in-one sensor is used for data acquisition of the detector, and the loading valve is used for adjusting the pressure of the hydraulic system.
2. The fault detector of the heavy-duty mechanical bridge erection system according to claim 1, wherein the lower computer signal acquisition and processing system comprises a C8051F020 single chip microcomputer, an oil pressure signal conditioning circuit, an oil temperature signal conditioning circuit, a flow signal conditioning circuit, a 5V switching value conditioning circuit, a 24V switching value conditioning circuit, a first relay control circuit, a second relay control circuit, a third relay control circuit, a fourth relay control circuit, an LCD display circuit, a power supply circuit, a clock circuit, a JTAG circuit, a serial port communication circuit, a reset circuit and a power supply detection and conditioning circuit;
the oil pressure signal conditioning circuit, the oil temperature signal conditioning circuit, the flow signal conditioning circuit, the 5V switching value conditioning circuit, the 24V switching value conditioning circuit, the first relay control circuit, the second relay control circuit, the third relay control circuit, the fourth relay control circuit, the LCD display circuit, the power supply circuit, the clock circuit, the JTAG circuit, the serial port communication circuit, the reset circuit and the power supply detection conditioning circuit are all connected with the C8051F020 single chip microcomputer;
the oil pressure signal conditioning circuit converts the collected oil pressure signal into a digital signal and transmits the digital signal to the singlechip; the oil temperature signal conditioning circuit converts the acquired oil temperature signal into a digital signal and transmits the digital signal to the singlechip; the flow signal conditioning circuit converts the acquired flow signal into a digital signal and transmits the digital signal to the singlechip; the 5V switching value conditioning circuit conditions and converts an input 5V switching value signal into a signal which can be identified by a singlechip; the 24V switching value conditioning circuit is used for conditioning and converting an input 24V switching value signal into a signal which can be identified by a single chip microcomputer by adopting a photoelectric isolation technology; the first relay control circuit outputs 24V voltage to drive a switch and an indicator light which need 24V voltage on the movable operation box; the second relay control circuit outputs 5V voltage to drive a switch which needs 5V voltage on the movable operation box; the third relay control circuit outputs 5V voltage to drive an alarm lamp; the fourth relay control circuit outputs 5V voltage to drive the buzzer; the liquid crystal display circuit is used for displaying oil pressure, oil temperature and flow information; the power circuit adopts a rechargeable lithium battery to supply power to the system; the clock circuit is used for providing a system clock; the JTAG circuit is used for downloading the program of the single chip microcomputer; the serial port communication circuit is based on an RS232 serial bus communication mode, and data information exchange is carried out between an MAX232 chip and an industrial personal computer; the reset circuit is used for resetting the singlechip; the power supply detection conditioning circuit is used for conditioning and converting the vehicle-mounted power supply signal into a signal which can be identified by the singlechip.
3. The heavy-duty mechanized bridge construction system fault detector of claim 1, wherein the triad sensors include a TPP temperature sensor, a PTT pressure sensor, and a CT turbine flow sensor.
4. The fault detector according to claim 3, wherein the three-in-one sensor simultaneously performs temperature, pressure and flow detection on the hydraulic system at the same time.
5. The fault detector according to claim 1, wherein the sensor data collection air socket is a 41-core air socket for connecting the detector and the sensor.
6. The fault detector for heavy-duty mechanized bridge erection system according to claim 1, wherein the detection aerial socket of the movable operation box adopts a 41-core aerial socket for connection of the detector and the movable operation box.
7. The fault detector of a heavy-duty mechanical bridge system according to claim 1, wherein the power detection aviation socket is a 15-core aviation socket for connecting the detector to a vehicle-mounted power supply.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112484564A (en) * | 2020-12-01 | 2021-03-12 | 中国人民解放军陆军工程大学 | Portable breechblock lubricating system detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112484564A (en) * | 2020-12-01 | 2021-03-12 | 中国人民解放军陆军工程大学 | Portable breechblock lubricating system detector |
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