A collision avoidance system failure detection apparatus and method

Abstract

The present application relates to the field of fault detection, and is applied to the fault detection and maintenance of the ultrasonic anti-collision system of the yard crane, and has the technical scheme of an anti-collision system fault detection device and method, wherein the detection object of the anti-collision system comprises an ultrasonic sensor, a signal enhancement adapter and a system PLC; the device comprises a transparent box body, a detection interface and a detection module, the detection module is located in the transparent box body, the detection interface is connected with the detection module and extends from the side of the transparent box body to the outside of the transparent box body, the detection interface comprises a control adapter interface, an ultrasonic sensor detection interface, an adapter output interface and a system PLC detection interface, the detection module comprises a power supply unit, a single-chip microcomputer unit, a display screen unit, a button and a detection unit, the power supply unit adopts a stabilized power supply, the button is used for starting detection, the display screen unit is located on the uppermost layer, and the detection unit is used for detecting whether the anti-collision system has a fault.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fault detection, more particularly, applied to the fault detection of the ultrasonic anti-collision system of the yard crane, and relates to an anti-collision system fault detection device and method. BACKGROUND

[0002] The yard crane is a commonly used device in the container yard of a port. In order to improve the container capacity of the yard, a dedicated device travel path is reserved in the design of the yard, which is divided into a loading and unloading operation path and a non-operation path. Due to the stacking of containers in the yard and the structural characteristics of the device itself, the driver cannot fully observe the situation on the non-operation path side when operating the device travel crane, and therefore each yard crane device is equipped with a travel crane ultrasonic anti-collision system to improve the safety of the device.

[0003] When the yard crane device is running, the ultrasonic anti-collision system monitors the obstacles on the travel path of the crane in real time through ultrasonic sensors. When the ultrasonic sensor detects obstacles on the travel path in the running direction of the crane, the system will alert, slow down and stop the crane to remind the driver of the operation and reduce the occurrence of safety accidents.

[0004] When the system fails during use and needs to be maintained, there are problems such as great difficulty in maintenance and long maintenance time. When the device feedbacks an obstacle alarm signal, the on-site maintenance technician cannot use common electrician tools to judge and locate the specific faulty device, resulting in the need to replace each element of the anti-collision system one by one and exclude each electrical node one by one during fault maintenance, which is a great workload and takes a long time to repair, seriously affecting the reliability of the device. SUMMARY

[0005] The present application aims to overcome at least one of the above-mentioned defects of the prior art, and provides an anti-collision system fault detection device and method to solve the problems of large workload and long maintenance time in fault maintenance.

[0006] The present application adopts the following technical solutions:

[0007] In a first aspect, an anti-collision system fault detection device is provided, and the technical solutions include:

[0008] The anti-collision system detection object includes an ultrasonic sensor, a signal enhancement adapter and a system PLC;

[0009] The device includes a transparent box, a detection interface and a detection module, the detection module is located in the transparent box, and the detection interface is connected with the detection module and extends from the side of the transparent box to the outside of the transparent box;

[0010] The detection interface includes a control adapter interface, an ultrasonic sensor detection interface, an adapter output interface and a system PLC detection interface;

[0011] The detection module includes a power supply unit, a single-chip microcomputer unit, a display screen unit, a button, and a detection unit, the power supply unit adopts a stabilized power supply, the button is used for starting detection, and the display screen unit is located at the uppermost layer; the detection unit is used for detecting whether the anti-collision system has a fault.

[0012] Further, the detection unit includes a detection adapter circuit used for detecting an ultrasonic sensor fault.

[0013] The detection adapter circuit includes a detection adapter wiring port, resistors R34, R37, and R70, a capacitor C34, a transistor Q14, and a single-chip microcomputer pin P1.1.

[0014] One end of the ultrasonic sensor detection interface is connected with the ultrasonic sensor wiring port, and the other end is connected with the detection adapter circuit, the ultrasonic sensor wiring port includes three level signal ports used for identifying different distances between the ultrasonic sensor and an obstacle.

[0015] The detection adapter wiring port is connected with a VCC 24V voltage and a GND ground, the resistor R37 is connected with a base of the transistor Q14, one end of the capacitor C34 and the resistor R34 is connected between the resistor R37 and the base of the transistor Q14, and the other end of the capacitor C34 and the resistor R34 is connected with the GND ground respectively.

[0016] An emitter of the transistor Q14 is connected with the GND ground, a collector of the transistor Q14 is connected with the resistor R70, and the other end of the resistor R70 is connected with a VCC 5V voltage; the collector of the transistor Q14 is connected with the single-chip microcomputer pin P1.1.

[0017] Further, the detection unit further includes a control adapter circuit used for detecting a signal enhancement adapter fault, and the signal enhancement adapter includes three signal channels.

[0018] The control adapter circuit is connected with an input end of the signal enhancement adapter through a control adapter interface, and the detection adapter circuit is connected with an output end of the signal enhancement adapter through an adapter output interface.

[0019] The control adapter circuit includes a single-chip microcomputer pin P1.3, a resistor R31, a capacitor C31, and a transistor Q11.

[0020] The single-chip microcomputer pin P1.3 outputs a voltage through a single-chip microcomputer unit, one end of the single-chip microcomputer pin P1.3 is connected with a resistor R31, the resistor R31 is connected with a base of a triode Q11, one end of a capacitor C31 is connected across the resistor R31 and the base of the triode Q11, the other end of the capacitor C31 and an emitter of the triode Q11 are both connected with GND, and a collector of the triode Q11 is connected with a control adapter interface.

[0021] Further, the detection unit further comprises a system PLC circuit for detecting system PLC failure, and the system PLC comprises three signal channels.

[0022] The system PLC comprises a system PLC input wiring port, and the system PLC circuit and the system PLC input wiring port are connected through a system PLC detection interface.

[0023] The system PLC circuit comprises a single-chip microcomputer pin P1.3, resistors R8 and R13, a triode Q17, an optoelectronic coupler, a VCC 24V voltage, and a wiring port; the single-chip microcomputer pin P1.3 is connected with the resistor R13 and receives an input voltage of a single-chip microcomputer; the resistor R13 is connected with a base of the triode Q17, an emitter of the triode Q17 is connected with GND, a collector of the triode Q17 is connected with a negative electrode of a light-emitting diode in the optoelectronic coupler, a VCC 24V voltage flows into a resistor R8, and the resistor R8 is connected with a positive electrode of the light-emitting diode in the optoelectronic coupler; and the optoelectronic coupler is connected with the wiring port.

[0024] The system PLC input wiring port comprises a plurality of indicator lamps for displaying input voltage characteristics.

[0025] Further, the resistors R8, R13, R31, R34, R37, and R70 are all 0805 packages, and the resistance values are 10K, 4.7K, 4.7K, 30K, 10K, and 4.7K respectively.

[0026] The capacitors C31 and C34 are 0805 packages, and the capacitances are 0.1uF.

[0027] The triodes Q11, Q14, and Q17 are S8050 triodes packaged in SOT23.

[0028] The optoelectronic coupler is a G3VM_601BY optocoupler packaged in sop6.

[0029] The single-chip microcomputer unit is STC12C5608AD.

[0030] The display screen unit is an LCD12864 liquid crystal display screen.

[0031] The power supply unit comprises an insurance circuit, a 24V voltage stabilizing circuit and a 24V-to-5V conversion circuit.

[0032] In a second aspect, a method for detecting faults of a collision avoidance system is provided, comprising connecting a device to be detected to a fault detection device of the collision avoidance system through a corresponding detection interface;

[0033] Selecting a detection function through the display unit, wherein the detection function comprises ultrasonic sensor detection, signal enhancement adapter detection and system PLC detection;

[0034] Turning on a detection switch of the fault detection device of the collision avoidance system;

[0035] Inputting different voltages to the detection unit;

[0036] Processing the voltage level signals of the detection unit by the single-chip microcomputer unit;

[0037] Outputting different voltage digital codes to the display unit, and determining whether the device to be detected is faulty according to the voltage digital codes displayed by the display unit.

[0038] Further, the method is used for detecting whether the ultrasonic sensor is faulty, comprising connecting the ultrasonic sensor to a detection adapter circuit through a control adapter interface;

[0039] Turning on the detection switch, and selecting the ultrasonic sensor detection function through the display unit;

[0040] Deploying an obstacle, which is placed 5-8 meters in front of the ultrasonic sensor probe;

[0041] Moving the obstacle towards the ultrasonic sensor;

[0042] When the obstacle is moved to a distance less than or equal to 4 meters, 2 meters or 1 meter from the ultrasonic sensor, the display unit outputs different voltage level signal digital codes; the normal feature of the ultrasonic sensor is that the ultrasonic sensor inputs 24V high level to the detection adapter circuit, and the detection adapter circuit outputs 0V low level.

[0043] Further, the method is used for detecting whether the signal enhancement adapter is faulty, comprising connecting the control adapter circuit to the input end of the signal enhancement adapter through the control adapter interface, and connecting the detection adapter circuit to the output end of the signal enhancement adapter through the adapter output interface;

[0044] Turning on the detection switch, and selecting the signal enhancement adapter detection function through the display unit;

[0045] Inputting 24V high level and 0V low level to the signal enhancement adapter through the adapter, respectively;

[0046] The output level signal digital code of the signal enhancement adapter is displayed by the display screen unit, and the signal enhancement adapter is characterized by outputting 24V high level when inputting 0V low level or outputting 0V low level when inputting 24V high level.

[0047] Further, the method is used for detecting whether the system PLC is faulty, including system PLC circuit and system PLC input wiring port connection;

[0048] The detection switch is turned on, and the display screen unit selects the system PLC detection function;

[0049] The 24V high level and 0V low level are input to the system PLC input wiring port through the system PLC circuit;

[0050] Whether the system PLC is faulty is judged through the input port indicator light state of the PLC, and the system PLC is characterized by that the input port indicator light of the system PLC displays the on state when the system PLC circuit inputs 24V high level.

[0051] Further, the method comprises:

[0052] The on state of the power supply of the display screen unit is detected;

[0053] The function selection of the to-be-detected equipment is displayed;

[0054] The function selection information of the to-be-detected equipment is acquired, and the detected equipment function detection interface after selection is displayed;

[0055] The level signal transmitted by the detection module is received and the digital code is displayed.

[0056] Compared with the prior art, the method has the beneficial effects that:

[0057] 1. The fault of the yard crane ultrasonic wave anti-collision system is quickly judged, the maintenance efficiency is improved, and the equipment maintainability is reduced.

[0058] 2. The performance of the anti-collision system electrical element is effectively detected, and the quantity of spare parts replacement is reduced.

[0059] 3. The fault detection device is light, waterproof, stable, reliable and convenient to maintain. BRIEF DESCRIPTION OF DRAWINGS

[0060] Figure 1 It is a structural schematic view of the anti-collision system fault detection device in the application;

[0061] Figure 2 It is an ultrasonic wave sensor fault detection circuit diagram in the application;

[0062] Figure 3 It is a signal enhancement adapter fault detection circuit diagram in the application;

[0063] Figure 4 For the system PLC fault detection circuit diagram in the application;

[0064] Figure 5 For the anti-collision system fault detection method flow chart in the application;

[0065] Figure 6 For the ultrasonic sensor fault detection method flow chart in the application;

[0066] Figure 7 For the signal enhancement adapter fault detection flow chart in the application;

[0067] Figure 8 For the system PLC fault detection flow chart in the application;

[0068] Figure 9 For the display screen unit display method flow chart when fault detection in the application.

[0069] The application figure mark is: 1: transparent box, 2: detection module, 3: power unit, 4: detection unit, 5: single-chip microcomputer unit, 6: display screen unit, 7: button, 21: control adapter interface, 22: ultrasonic sensor detection interface, 23: adapter output interface, 24: system PLC detection interface, 41: detection adapter circuit, 42: control adapter circuit, 43: system PLC circuit, 431: system PLC input wiring port, 100: ultrasonic sensor, 200: signal enhancement adapter, 300: system PLC. DETAILED DESCRIPTION

[0070] The application figure is only for example description, and can not be understood as the limitation of the application.For better description of the following embodiment, some components of the drawing can be omitted, enlarged or reduced, and do not represent the size of the actual product;for those skilled in the art, it is understandable that some well-known structures in the drawing and their description can be omitted.

[0071] In some embodiments, as Figure 1 The structure schematic diagram of a kind of anti-collision system fault detection device as shown in some embodiments is applied to the fault maintenance of yard crane trolley ultrasonic anti-collision system, and yard crane is specially used for tyre type container gantry crane.The detection object of the anti-collision system includes ultrasonic sensor 100, signal enhancement adapter 200 and system PLC 300.

[0072] The ultrasonic sensor 100 as a detection element in the anti-collision system is installed at the position of the equipment cart, and detects obstacles in the direction of the yard cart in real time, and has the characteristics of long measuring distance, fast detection speed and wide detection range. The signal enhancement adapter 200 is used for the communication element of the ultrasonic sensor 100 signal and the system PLC 300. Because the ultrasonic wave adopts low-level signal output, in order to improve the signal transmission distance and reduce the signal interference of the cart motor electric control system, the signal enhancement adapter 200 is configured in the ultrasonic sensor 100 control box. The system PLC 300 is mainly used for signal communication, data transmission, logic control and interlocking protection of the ultrasonic sensor 100 signal and the device basic electric control main system.

[0073] The device comprises a transparent box body 1, a detection interface, and a detection module 2 located in the transparent box body 1. The detection interface is connected with the detection module 2 and extends from the side of the transparent box body 1 to the outside of the transparent box body 1. The transparent box body 1 has an outer dimension of 175mm*125mm*75mm. A transparent cover is selected to directly view the information of the display screen unit 6 installed in the box body. The detection interface is externally connected from the side. Since the anti-collision system is mainly used in outdoor scenes such as ports, the entire transparent box body 1 can not only directly view the internal information, but also has a waterproof function, which can meet the needs of different outdoor weather environments.

[0074] The detection interface comprises a control adapter interface 21, an ultrasonic sensor 100 detection interface 22, an adapter output interface 23, and a system PLC detection interface 24. One end of the detection interface is connected to the detection module 2 by tin soldering. The other end is connected according to the connection mode of the wiring connectors of the ultrasonic sensor 100, the signal enhancement adapter 200, and the system PLC 300, and is equipped with a special quick plug matched with the socket to ensure good line contact and avoid signal fluctuation attenuation or interference variation. During on-site fault maintenance, the detection can be quickly plugged into the corresponding detection interface, improving the efficiency of on-site fault maintenance.

[0075] The detection module 2 comprises a power supply unit 3, a single-chip microcomputer unit 5, a display screen unit 6, a button 7, and a detection unit 4. The power supply unit 3 adopts a stabilized power supply. The button 7 is used to start detection. The display screen unit 6 is located on the uppermost layer. The detection unit 4 is used to detect whether the anti-collision system has a fault.

[0076] The power supply unit 3 adopts a 24V stabilized power supply, and six lithium battery packs with a capacity of 3200mAh are built-in as the power supply unit 3. The detection device requires a discharge current of up to 5A, which is convenient for daily on-site maintenance work.

[0077] 24V power supply through two-way fuse to two-way load, FU1 supply to the microcontroller unit 5 and display screen unit 6, the other FU2 to ultrasonic sensor 100, signal enhancement adapter 200 power supply. When the fuse is blown, the corresponding light-emitting diode will light up, indicating the function of the fuse is blown. High-power diodes D103, D104 used as power reverse protection, when the positive and negative connection is wrong, the diode can protect the circuit board.

[0078] 24V voltage regulator circuit using LM2576-ADJ step-down switching regulator, the circuit can output 3A current. The output voltage is determined by the resistance R61 and R62 voltage divider. Because the lithium battery is full of electricity, the voltage is higher than 24V, in order to make the output to the ultrasonic sensor 100 power supply voltage is stable at 24V, using the voltage regulator circuit can meet the use requirements.

[0079] 24V to 5V step-down circuit will be reduced to stable 5V lithium battery output voltage of 24V, supply microcontroller unit 5 and display screen unit 6. The circuit uses LM2576 step-down switching regulator with fixed output voltage, power on, the indicator light on the detection device, representing the circuit into working state.

[0080] Microcontroller unit 5 mainly by STC12C5608AD microcontroller, power filter capacitor C201, power-on reset circuit C90, R91, program download interface and crystal oscillator circuit. According to the test ultrasonic sensor 100, signal enhancement adapter 200 and system PLC circuit 43 requirements, allocation of microcontroller resources and write the corresponding program. The microcontroller is provided with 8 channels 10-bit precision ADC analog-to-digital conversion function, one of which is used in this embodiment as a detection battery voltage. Crystal oscillator using frequency of 11.0592MHz SMD crystal.

[0081] Display screen unit 6 using LCD12864 LCD display, voltage 5V, with font library, with backlight function of black and white LCD display. The display uses 8-bit parallel communication interface, occupying 8 ports of the microcontroller, the backlight lamp is controlled separately by the transistor in the figure. Parallel communication interface is provided with 8 pull-up resistors, improve the communication stability of the microcontroller and display screen unit 6.

[0082] In some embodiments, such as Figure 2 and Figure 6 Ultrasonic sensor 100 fault detection circuit diagram and detection method in the present application.

[0083] The detection unit 4 for detecting the fault of the ultrasonic sensor 100 comprises a detection adapter circuit 41, which comprises a detection adapter wiring port, resistors R34, R37, R70, a capacitor C34, a transistor Q14, and a single-chip microcomputer pin P1.1.

[0084] One end of the ultrasonic sensor 100 detection interface 22 is connected to the ultrasonic sensor 100 wiring port, and the other end is connected to the detection adapter circuit 41. The ultrasonic sensor 100 wiring port comprises three level signal ports for identifying different distances between the ultrasonic sensor 100 and an obstacle. According to the characteristics of the ultrasonic sensor 100, the three different ports can respectively detect obstacles within 4 meters, 2 meters, and 1 meter, and the three wiring ports output low-level signals in turn. When the distance of the detected obstacle is less than 4 meters, wiring port 1 will output a low-level signal. When the distance of the detected obstacle is less than 2 meters, wiring port 2 will output a low-level signal. When the distance of the detected obstacle is less than 1 meter, wiring port 3 will output a low-level signal.

[0085] The detection adapter circuit 41 comprises: the detection adapter wiring port is connected to a VCC 24V voltage and a GND ground, the resistor R37 is connected to the base of the transistor Q14, the capacitor C34 and one end of the resistor R34 are connected across the resistor R37 and the connection line of the base of the transistor Q14, and the other ends of the capacitor C34 and the resistor R34 are respectively connected to the GND ground; the emitter of the transistor Q14 is connected to the GND ground, the collector of the transistor Q14 is connected to the resistor R70, and the other end of the resistor R70 is connected to a VCC 5V voltage; and the collector of the transistor Q14 is connected to the single-chip microcomputer pin P1.1.

[0086] When the ultrasonic sensor 100 inputs a 24V high level to the detection adapter circuit 41 of the detection device, the 24V high-level signal of 24V passes through the current-limiting resistor R37 to limit the current flowing through, and then charges the capacitor C34. As the voltage of the capacitor C34 rises, the current begins to flow through the emitter of the transistor Q14. When it rises to the conduction of the transistor Q14, the 5V voltage at the collector of the transistor Q14 will be pulled low to a low level, and at the same time, the single-chip microcomputer pin P1.1 is also pulled low to a low level, and the low level is sent to the single-chip microcomputer.

[0087] When the ultrasonic sensor 100 inputs a low level to the detection adapter circuit 41 of the detection device, the low level signal passes through the current limiting resistor R37, and if the C34 capacitor has electricity, the capacitor C34 is discharged, and as the power of the capacitor C34 decreases, the current flowing through the emitter of the transistor Q14 decreases, when the transistor Q14 is cut off, the collector voltage of the transistor Q14 is pulled up to 5V high level high level by the pull-up resistor R70, and the MCU pin P1.1 also becomes 5V high level high level, and the 24V high level is sent to the MCU.

[0088] The resistors R37, R34, and R70 in the circuit are 0805 packages, and the resistance values are 10K, 30K, and 4.7K respectively; the capacitor C34 is a 0805 package with a capacity of 0.1uF; the transistor uses a type S8050 with an SOT23 package.

[0089] In this embodiment, a kind of ultrasonic sensor 100 fault detection method is also included, as follows:

[0090] S200: the ultrasonic sensor 100 is accessed to the detection adapter circuit 41 by the control adapter interface 21;

[0091] S202: open the detection switch, and the display screen unit 6 selects the ultrasonic sensor 100 detection function;

[0092] S204: deploy the obstruction, and the obstruction is placed in front of the ultrasonic sensor 100 probe 5-8 meters;

[0093] S206: the obstruction moves towards the ultrasonic sensor 100;

[0094] S208: when the obstruction moves to less than or equal to 4 meters, 2 meters, 1 meter from the ultrasonic sensor 100, the display screen unit 6 outputs different level signal digital codes;The normal characteristics of the ultrasonic sensor 100 are that the ultrasonic sensor 100 inputs 24V high level to the detection adapter circuit 41, and the detection adapter circuit 41 outputs 0V low level.

[0095] In some embodiments, as Figure 3 and Figure 7 The signal enhancement adapter 200 fault detection circuit diagram and fault detection method of the application.

[0096] The control adapter circuit 42 is connected with the input end of the signal enhancement adapter 200 through the control adapter interface 21, and the detection adapter circuit 41 is connected with the output end of the signal enhancement adapter 200 through the adapter output interface 23.

[0097] The control adapter circuit 42 is connected with the input end of the signal enhancement adapter 200 through the control adapter interface 21, and the detection adapter circuit 41 is connected with the output end of the signal enhancement adapter 200 through the adapter output interface 23;

[0098] The control adapter circuit 42 comprises a single-chip microcomputer pin P1.3, a resistor R31, a capacitor C31 and a triode Q11.

[0099] The single-chip microcomputer pin P1.3 outputs a voltage through the single-chip microcomputer unit 5, one end of the single-chip microcomputer pin P1.3 is connected with the resistor R31, the resistor R31 is connected with the base of the triode Q11, one end of the capacitor C31 is connected across the resistor R31 and the base of the triode Q11, the other end of the capacitor C31 is connected with the emitter of the triode Q11 and the ground, and the collector of the triode Q11 is connected with the control adapter interface 21.

[0100] When the single-chip microcomputer pin P1.3 outputs a 5V high level, the triode Q11 is provided with a conduction current through a current-limiting resistor, the triode is turned on, the detection device outputs a 0V low level to the input end of the adapter, if the adapter is normal, the port of the corresponding signal channel of the adapter outputs a 24V high level, the current flowing through the resistor R37 is limited, the C34 capacitor is charged, with the voltage of the capacitor C34 rising, the current begins to flow through the emitter of the triode Q14, when rising to the triode Q14 conduction, the 5V voltage of the collector of the triode Q14 is pulled low to a low level, and the single-chip microcomputer pin P1.1 is also pulled low to a low level. The low level is sent to the single-chip microcomputer.

[0101] When the single-chip microcomputer pin P1.3 outputs a 0V low level, the triode Q11 is cut off because the base has no current, the input end of the adapter has no low level input, the corresponding output signal channel has no 24V high level output to the detection device, the internal detection circuit triode Q14 of the detection device is turned off from conduction, the voltage of the collector of the triode Q14 is pulled high to a 5V high level under the action of the pull-up resistor R70, and the single-chip microcomputer pin P1.1 also becomes a 5V high level, and the 24V high level is sent to the single-chip microcomputer.

[0102] The detection device controls the input high and low level signals of the adapter, simultaneously detects the level signals of the output port of the adapter, and judges that the adapter is normal if the input and output characteristics of the adapter are met, and judges that the adapter is damaged if the input and output characteristics of the adapter are not met.

[0103] The resistors R31, R37, R34 and R70 in the circuit are 0805 packages, and the resistance values are 4.7K, 10K, 30K and 4.7K respectively; the capacitors C34 and C31 are 0805 packages, and the capacitances are 0.1uF; the transistors Q11 and Q14 are S8050 type transistors with SOT23 package.

[0104] In the embodiment, a method for detecting the failure of the signal enhancement adapter 200 is also included, and the method is as follows:

[0105] S300: the control adapter circuit 42 is connected with the input end of the signal enhancement adapter 200 through the adapter interface 21, and the detection adapter circuit 41 is connected with the output end of the signal enhancement adapter 200 through the adapter output interface 23;

[0106] S302: the detection switch is turned on, and the display screen unit 6 selects the signal enhancement adapter 200 detection function;

[0107] S304: the signal enhancement adapter 200 is inputted with 24V high level and 0V low level respectively through the adapter;

[0108] S306: the output level signal digital code of the signal enhancement adapter 200 is displayed respectively through the display screen unit 6, and the normal characteristics of the signal enhancement adapter 200 are that the output is 24V high level when the input is 0V low level, or the output is 0V low level when the input is 24V high level.

[0109] In some embodiments, as Figure 4 and Figure 8 The present application is a PLC failure detection circuit diagram and detection method of the system.

[0110] The system PLC 300 for detecting the failure includes a system PLC circuit 43, the system PLC 300 includes three signal channels, the detection device outputs 24V high level or 0V low level through the three signal channels, and the high and low levels are sent to the input terminal of the system PLC 300 through the detection interface. Then, whether there is signal input is viewed through the state of the signal input indicator light of the system PLC 300. In the normal state, the input port indicator light of the system PLC 300 is bright when the detection device outputs 24V high level, and the input port indicator light of the system PLC 300 is not bright when the detection device outputs 0V low level. According to the principle, whether the system PLC 300 and the wire harness have failure is judged.

[0111] The system PLC 300 includes a system PLC input wiring port 431, and the system PLC circuit 43 and the system PLC input wiring port 431 are connected through a system PLC detection interface 24.

[0112] The system PLC circuit 43 includes a single-chip microcomputer pin P1.3, resistors R8 and R13, a triode Q17, an optical coupler, a VCC 24V voltage, and a wiring port; the single-chip microcomputer pin P1.3 is connected with the resistor R13 and receives a single-chip microcomputer input voltage; the resistor R13 is connected with a base of the triode Q17, an emitter of the triode Q17 is connected with a ground GND, a collector of the triode Q17 is connected with a negative electrode of a light-emitting diode in the optical coupler, a VCC 24V voltage flows into the resistor R8, and the resistor R8 is connected with a positive electrode of the light-emitting diode in the optical coupler; and the optical coupler is connected with the wiring port.

[0113] The system PLC input wiring port 431 includes a plurality of indicator lights for displaying input voltage characteristics.

[0114] When the single-chip microcomputer pin P1.3 outputs a 5V high level high level, a conduction current is provided to the triode Q11 through a current-limiting resistor, the triode is turned on, a current of a 24V power supply flows through the resistor R8 to a light-emitting diode of the optical coupler, and then flows to a negative electrode of a power supply through the turned-on triode Q17 to form a loop, and the optical coupler is turned on. After the optical coupler is turned on, the output wiring port of the detection device outputs a 24V high level of 24V to the system PLC 300, and after the system PLC 300 inputs the 24V high level, a signal indicator light is bright. It is proved that the input signal line bundle of the system PLC 300 and the system PLC 300 are normal. When the single-chip microcomputer pin P1.3 outputs a 0V low level, the triode Q17 is cut off, and the optical coupler also becomes a non-conduction state because there is no current flowing through the input end, and therefore the output wiring port of the detection device has no 24V high level output, and the input signal indicator light of the system PLC 300 is not bright. In use, the operation field bridge trolley anti-collision ultrasonic ranging system detection device alternately outputs high and low levels to the system PLC 300, and if the input signal indicator light of the system PLC 300 can alternately brighten and dim, it is proved that the line bundle and the system PLC 300 are normal. If the input signal indicator light of the system PLC 300 is always bright or long off, it is proved that the line bundle or the system PLC 300 has a fault.

[0115] The resistors R13 and R8 in the circuit are both 0805 packages, and the resistance values are 4.7K and 10K respectively; the triode Q17 is a triode with a model number of S8050 and a package of SOT23; and the optical coupler is an optical coupler with a model number of G3VM_601BY and a package of sop6.

[0116] In the embodiment, a system PLC 300 fault detection method is also included, and the method is as follows:

[0117] S400: the system PLC circuit 43 and the system PLC input terminal port 431 are connected;

[0118] S402: the detection switch is turned on, and the display screen unit 6 selects the system PLC 300 detection function;

[0119] S404: 24V high level and 0V low level are input to the system PLC input terminal port 431 through the system PLC circuit 43;

[0120] S406: whether the system PLC 300 is faulty is determined through the input port indicator light of the system PLC 300, and the normal feature of the system PLC 300 is that the input port indicator light of the system PLC 300 displays the on state when the system PLC circuit 43 inputs 24V high level.

[0121] In some embodiments, as Figure 5 The flow chart of the anti-collision system fault detection method in the application is as follows:

[0122] S100: the to-be-detected equipment accesses the anti-collision system fault detection device through the corresponding detection interface;

[0123] S102: the detection function including the ultrasonic sensor 100 detection, the signal enhancement adapter 200 detection and the system PLC 300 detection is selected through the display screen unit 6;

[0124] S104: the detection switch of the anti-collision system fault detection device is turned on;

[0125] S106: different voltages are input to the detection unit 4;

[0126] S108: the single-chip microcomputer unit 5 processes the level signal of the detection unit 4;

[0127] S110: different voltage digital codes are output to the display screen unit 6, and whether the to-be-detected equipment is faulty is determined according to the voltage digital code displayed by the display screen unit 6.

[0128] In some embodiments, as Figure 9 The display method flow chart of the display screen unit 6 during fault detection in the application is as follows:

[0129] S500: the power-on state of the detection display screen unit 6 is detected;

[0130] S502: the to-be-detected equipment function selection is displayed;

[0131] S504: the to-be-detected equipment function selection information is acquired, and the selected to-be-detected equipment function detection interface is displayed;

[0132] S506 receives the level signal transmitted by the detection module 2 and displays the digital code

[0133] Obviously, the above embodiments of the present application are only examples for clearly illustrating the technical solutions of the present application, but are not intended to limit the specific embodiments of the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A kind of anti-collision system fault detection device, it is applied to the ultrasonic anti-collision system fault maintenance of yard bridge trolley, it is characterized in that: The anti-collision system detection object includes an ultrasonic sensor, a signal enhancement adapter and a system PLC; The device includes a transparent box, a detection interface and a detection module, the detection module is located in the transparent box, the detection interface is connected with the detection module and extends from the side of the transparent box to the outside of the transparent box; The detection interface includes a control adapter interface, an ultrasonic sensor detection interface, an adapter output interface and a system PLC detection interface; The detection module includes a power supply unit, a single-chip microcomputer unit, a display screen unit, a button and a detection unit, the power supply unit adopts a stabilized power supply, the button is used for starting detection, and the display screen unit is located at the uppermost layer; the detection unit is used for detecting whether the anti-collision system has a fault; The detection unit includes a detection adapter circuit for detecting an ultrasonic sensor fault; The detection adapter circuit includes a detection adapter wiring port, resistors R34, R37 and R70, a capacitor C34, a transistor Q14 and a single-chip microcomputer pin P1.1; One end of the ultrasonic sensor detection interface is connected with an ultrasonic sensor wiring port, and the other end is connected with the detection adapter circuit, the ultrasonic sensor wiring port includes three level signal ports for identifying different distances between the ultrasonic sensor and an obstacle; The detection adapter wiring port is connected with a VCC 24V voltage, a GND ground and the resistor R37, the resistor R37 is connected with a base of the transistor Q14, one end of the capacitor C34 and the resistor R34 is connected between the resistor R37 and the base of the transistor Q14, and the other end of the capacitor C34 and the resistor R34 is connected with the GND ground respectively; An emitter of the transistor Q14 is connected with the GND ground, a collector of the transistor Q14 is connected with the resistor R70, the other end of the resistor R70 is connected with a VCC 5V voltage, and the collector of the transistor Q14 is connected with the single-chip microcomputer pin P1.

1.

2. A collision avoidance system failure detection apparatus according to claim 1, wherein: The detection unit further includes a control adapter circuit for detecting a signal enhancement adapter fault, the signal enhancement adapter includes three signal channels; the control adapter circuit is connected with an input end of the signal enhancement adapter through a control adapter interface, and the detection adapter circuit is connected with an output end of the signal enhancement adapter through an adapter output interface; The control adapter circuit includes a single-chip microcomputer pin P1.3, a resistor R31 and a capacitor C31, and a transistor Q11; The single-chip microcomputer pin P1.3 outputs a voltage through a single-chip microcomputer unit, one end of the single-chip microcomputer pin P1.3 is connected with the resistor R31, the resistor R31 is connected with a base of the transistor Q11, one end of the capacitor C31 is connected between the resistor R31 and the base of the transistor Q11, the other end of the capacitor C31 and an emitter of the transistor Q11 are connected with a GND ground, and a collector of the transistor Q11 is connected with the control adapter interface.

3. A collision avoidance system failure detection apparatus according to claim 1, wherein: The detection unit further includes a system PLC circuit for detecting a system PLC fault, and the system PLC includes three signal channels. The system PLC includes a system PLC input wiring port, and the system PLC circuit and the system PLC input wiring port are connected through a system PLC detection interface; The system PLC circuit includes a single-chip microcomputer pin P1.3, resistors R8 and R13, a triode Q17, an optical coupler, a VCC 24V voltage, and a wiring port; the single-chip microcomputer pin P1.3 is connected with the resistor R13 and receives a single-chip microcomputer input voltage; the resistor R13 is connected with the triode Q17 base, the triode Q17 emitter is connected with the GND ground, the triode Q17 collector is connected with the negative electrode of the light-emitting diode in the optical coupler, the VCC 24V voltage flows into the resistor R8, and the resistor R8 is connected with the positive electrode of the light-emitting diode in the optical coupler; and the optical coupler is connected with the wiring port. The system PLC input wiring port includes a plurality of indicator lights for displaying input voltage characteristics.

4. The collision avoidance system fault detection device according to claim 2 or 3, characterized in that: The resistors R8, R13, R31, R34, R37, and R70 are 0805 packages, and the resistance values are 10K, 4.7K, 4.7K, 30K, 10K, and 4.7K, respectively; The capacitors C31 and C34 are 0805 packages, and the capacitances are 0.1uF; The triodes Q11, Q14, and Q17 are S8050 type triodes with SOT23 packages; The optical coupler is G3VM_601BY type with a sop6 package; The single-chip microcomputer unit is STC12C5608AD; The display screen unit is an LCD12864 liquid crystal display screen; The power supply unit includes an insurance circuit, a 24V voltage stabilizing circuit, and a 24V-to-5V conversion circuit.

5. A method of detecting a failure of a collision avoidance system, characterized in that The method is applied to the device of any one of claims 1 to 4, and the method includes connecting the device to be detected to the collision avoidance system fault detection device through a corresponding detection interface; The detection function is selected through the display screen unit, and the detection function includes ultrasonic sensor detection, signal enhancement adapter detection, and system PLC detection; The detection switch of the collision avoidance system fault detection device is turned on; Different voltages are input to the detection unit; The single-chip microcomputer unit processes the level signal of the detection unit; Different voltage digital codes are output to the display screen unit, and whether the device to be detected is faulty is determined according to the voltage digital code displayed by the display screen unit.

6. A method of detecting a failure of a collision avoidance system according to claim 5, characterized in that, The method is used for detecting whether the ultrasonic sensor is faulty, and includes connecting the ultrasonic sensor to the detection adapter circuit through the control adapter interface; The detection switch is turned on, and the ultrasonic sensor detection function is selected through the display screen unit; An obstacle is deployed, and the obstacle is placed 5-8 meters in front of the ultrasonic sensor probe; The obstacle moves towards the ultrasonic sensor; When the obstacle moves to a distance less than or equal to 4 meters, 2 meters, or 1 meter from the ultrasonic sensor, the display screen unit outputs different level signal digital codes; and the normal characteristics of the ultrasonic sensor are that the ultrasonic sensor inputs a 24V high level to the detection adapter circuit, and the detection adapter circuit outputs a 0V low level.

7. A method of detecting a failure of a collision avoidance system according to claim 6, characterized in that The method is used for detecting whether the signal enhancement adapter is faulty, comprising that the control adapter circuit is connected with the input end of the signal enhancement adapter through the control adapter interface, and the detection adapter circuit is connected with the output end of the signal enhancement adapter through the adapter output interface; Opening the detection switch, the display screen unit selects the signal enhancement adapter detection function; Inputting 24V high level and 0V low level to the signal enhancement adapter through the adapter respectively; Displaying the output level signal digital code of the signal enhancement adapter through the display screen unit, the normal feature of the signal enhancement adapter is outputting 24V high level when inputting 0V low level, or outputting 0V low level when inputting 24V high level.

8. A method of detecting a failure of a collision avoidance system according to claim 7, characterized in that, The method is used for detecting whether the system PLC is faulty, comprising that the system PLC circuit is connected with the system PLC input wiring port; Opening the detection switch, the display screen unit selects the system PLC detection function; Inputting 24V high level and 0V low level to the system PLC input wiring port through the system PLC circuit; Judging whether the system PLC is faulty through the input port indicator light state of the PLC, the normal feature of the system PLC is that the input port indicator light of the system PLC displays the on state when the system PLC circuit inputs 24V high level.

9. The method of claim 5, wherein, Comprising: Detecting the power on state of the display screen unit; Displaying the function selection of the equipment to be detected; Obtaining the function selection information of the equipment to be detected, and displaying the selected detection equipment function detection interface; Receiving the level signal transmitted by the detection module and displaying the digital code.

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