Independent braking automatic driving control system of JZ-7 type brake

Abstract

The invention discloses an independent braking automatic driving control system based on a JZ-7 type brake, which comprises an electronic braking control unit, an independent braking control module unit, a cab automatic driving exit button unit and an automatic driving state indicating lamp unit, and is characterized in that the electronic braking control unit is connected with an independent braking module through a cable; the independent brake control unit is connected with a locomotive through a communication cable, communicates with the locomotive through a preset communication protocol, feeds back various brake system information collected and judged by the locomotive to the locomotive, and is composed of an electromagnetic valve, a manual cock, a pressure sensor, a pressure measuring point, a dust filter, a two-way valve, an air cylinder, a mounting gas circuit board and a mounting frame. The main function is to receive a control signal to control independent brake pressure of the locomotive; the independent braking automatic driving control system of the JZ-7 type brake can realize automatic control or remote control of independent braking.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic driving control systems, and in particular to a separate braking automatic driving control system for a JZ-7 type brake machine. Background Art

[0002] The braking control of the entire train by the JZ-7 air brake is called automatic braking, and the control of only the locomotive is called individual braking. The present invention is used to replace the individual braking function of the JZ-7 brake to achieve automatic control or remote control of individual braking.

[0003] At present, the braking system of locomotives using JZ-7 air brakes in China is a pure air system without a dedicated automatic driving control device. It can only be operated manually by the driver and cannot be matched with locomotive automatic control or remote control systems to achieve automatic driving or assisted driving. Although some locomotives are equipped with simple braking system electronic control devices, they are all pure circuit control, so the control accuracy is poor, and there is no computer communication, fault diagnosis, information recording and other functions. Therefore, a separate braking automatic driving control system for the JZ-7 brake is needed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a separate braking automatic driving control system for a JZ-7 type brake machine to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a separate braking automatic driving control system based on a JZ-7 type brake machine, comprising an electronic brake control unit, a separate brake control module unit, an automatic driving exit button unit in a driver's cab and an automatic driving status indicator light unit, characterized in that: the electronic brake control unit is connected to the separate brake module through a cable, and is connected to the locomotive through a communication cable, and is used to display the start and stop status of the locomotive, communicates with the locomotive through a pre-set communication protocol, receives the communication signal sent by the locomotive and sends a control signal to the separate brake control module, and also feeds back various brake system information collected and determined by the locomotive to the locomotive, the separate brake control unit is composed of a solenoid valve, a manual plug door, a pressure sensor, a pressure measuring point, a dust filter, a two-way valve, an air cylinder and an air circuit board and a mounting frame, and its main function is to receive a control signal to control the separate brake pressure of the locomotive, the automatic driving exit button unit is used to force the system to exit the automatic driving mode, and the automatic driving status indicator light unit is directly controlled by the electronic brake control unit to display the status of the automatic driving.

[0006] Preferably, the electronic brake control unit has a power-on self-check function, and the detection items include: the pressure sensor is in normal state and the communication with the automatic driving unit is normal. A communication module is provided in the electronic brake control unit for connecting to the locomotive signal.

[0007] Preferably, the power-on self-check function is executed immediately after the locomotive is powered on. If the self-check does not meet the usage conditions, a fault code is sent to the automatic driving unit.

[0008] Preferably, the electronic brake control unit can receive the target pressure value of the separate acting pipe sent by the automatic driving unit in real time, and control the separate acting pipe to charge and exhaust air so that the separate acting pipe reaches the target pressure value.

[0009] Preferably, the braking control unit allows the automatic driving mode to be entered only if all of the following conditions are met: (1) The EBCU self-checks and shows no faults; (2) The EBCU did not detect a brake system fault; (3) The communication between EBCU and the automatic driving unit is normal.

[0010] Preferably, the braking control unit needs to enter the automatic driving mode according to the following steps: (1) Before the system enters the automatic driving mode, the locomotive must be in a zero-speed parking state and the brake cylinder pressure must be greater than 250 kPa, and 250 kPa is a temporary value; (2) The system can enter the automatic driving mode only after the brake control unit controls the pressure of the separate action pipe to rise to greater than 250 kPa; (3) When the electronic brake control unit receives the rising edge of the "autonomous driving mode activation" signal and both (1) and (2) are met, the system is activated and the brake control unit enters the automatic driving mode; (4) After entering the automatic driving mode, before the locomotive drives, the driver must ensure that the JZ-7 brake valve single valve and the self-valve handle are in the operating position.

[0011] Preferably, when the braking control unit is in the automatic driving mode, the driver exits the "automatic driving mode" after pressing the "automatic driving system exit button".

[0012] Preferably, it also includes four pressure sensors, which are installed on the original JZ-7 brake pipeline.

[0013] Preferably, the electronic brake control unit can collect the pressure values ​​of the individual action pipe, the I and II end balancing air cylinders, the train pipe, the brake cylinder, and the total air cylinder in real time, and the collection period is less than 10HZ.

[0014] Preferably, the electronic brake control unit can upload the pressure values ​​of the individual action pipe, the I and II end balancing air cylinders, the train pipe, the brake cylinder, and the total air cylinder in real time, and the response time is less than 100ms.

[0015] Compared with the existing technology, this scheme designs a separate braking automatic driving control system for the JZ-7 brake machine, which has the following beneficial effects: The solution can realize automatic control or remote control of individual brakes, and with the help of the electronic brake control unit (EBCU) in the system, it can collect and analyze information from various parts of the locomotive braking system, and realize functions such as fault diagnosis, fault analysis, information recording, and data communication.

[0016] The design of a separate braking control module. The overall principle and installation method of this module are independently designed by our company. It is specially designed to be compatible with the JZ-7 brake machine. It can add a separate braking automatic driving control function to the system without affecting the original brake machine control. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the principle diagram of the gas circuit of the system of the present invention; Figure 2 It is the system electrical schematic diagram of the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1 to Figure 2, which is the first technical solution provided by the present invention: a separate braking automatic driving control system based on a JZ-7 type brake machine, including an electronic braking control unit, a separate braking control module unit, an automatic driving exit button unit in the driver's cab and an automatic driving status indicator light unit, characterized in that: the electronic braking control unit is connected to the separate braking module through a cable, connected to the locomotive through a communication cable, used to display the start and stop status of the locomotive, communicate with the locomotive through a pre-set communication protocol, receive communication signals sent by the locomotive and send control signals to the separate braking control module, and also feed back various brake system information collected and determined by the locomotive, the separate braking control unit has a solenoid valve, a manual plug door, a pressure sensor, a pressure measuring point, It consists of a dust filter, a two-way valve, an air cylinder, an air circuit board and a mounting frame. Its main function is to receive control signals to control the locomotive's individual braking pressure. The automatic driving exit button unit is used to force the system to exit the automatic driving mode. The automatic driving status indicator unit is directly controlled by the electronic brake control unit and is used to display the state of the automatic driving. The solenoid valve includes a brake solenoid valve (C.16) and a relief solenoid valve (C.15) for controlling the pressure of the individual acting pipe. The air source supplies air to the brake solenoid valve after passing through the dust filter (C.12), the pressure sensor (C.7), the manual plug gate (C.10) and the pressure reducing valve (C.9). The brake solenoid valve (C.16) is provided with a backup. When the main solenoid valve fails, the backup solenoid valve is automatically activated to ensure the braking effect. The pressure sensor (C.7) is used to collect the total air source pressure, and the pressure sensor (C.6) and the pressure sensor (C.5) are used to collect the pressure of the single working pipe. The two manual plug gates (C.10 / C.11) are used to control the on and off of the total air source and the single working pipe respectively. The volume air cylinder (C.9) is used to provide volume for the single-acting pipe, and the two-way valve (C.8) is used to switch the control of the automatic control module and the JZ-7 individual brake valve. The EBCU can determine the status of the brake system based on the collected information, and realize fault diagnosis, fault recording, information recording, information transmission and other kinetic energy.

[0020] The electronic brake control unit has a power-on self-test function, and the detection items include: the pressure sensor is in normal condition and the communication with the automatic driving unit is normal. A communication module is provided in the electronic brake control unit for connecting the locomotive signal. The communication module is a wifi antenna, and the EBCU communicates with the automatic driving unit using the CAN bus.

[0021] The power-on self-check function is executed immediately after the locomotive is powered on. If the self-check does not meet the usage conditions, a fault code is sent to the automatic driving unit.

[0022] The electronic brake control unit can receive the target pressure value of the separate acting pipe sent by the automatic driving unit in real time, and control the separate acting pipe to charge and exhaust air so that the separate acting pipe reaches the target pressure value (the control accuracy is determined according to subsequent test parameters).

[0023] The brake control unit allows the automatic driving mode to be entered only if all of the following conditions are met: (1) The EBCU self-checks and shows no faults; (2) The EBCU did not detect a brake system fault; (3) The communication between EBCU and the automatic driving unit is normal.

[0024] The system is equipped with "penalty braking mode", which is automatically implemented when the system determines that a fault occurs and the automatic driving is abnormally exited. The actions are as follows: If the current single-pipe pressure is less than 250, the system controls the single-pipe pressure to 250kPa. If the current single-pipe pressure is greater than 250Pa, the current pressure value is directly locked. The EBCU issues a system abnormal exit prompt until the driver presses the automatic driving exit button, and the brake is controlled by the JZ-7 brake valve.

[0025] The brake control unit needs to follow the steps below to enter the automatic driving mode: (1) Before the system enters the automatic driving mode, the locomotive must be in a zero-speed parking state and the brake cylinder pressure must be greater than 250 kPa (250 kPa is a provisional value; (2) The system can enter the automatic driving mode only after the brake control unit controls the pressure of the separate action pipe to rise to greater than 250 kPa; (3) When the electronic brake control unit receives the rising edge of the "autonomous driving mode activation" signal and both (1) and (2) are met, the system is activated and the brake control unit enters the automatic driving mode; (4) After entering the automatic driving mode, before the locomotive drives, the driver must ensure that the JZ-7 brake valve single valve and the self-valve handle are in the operating position.

[0026] When the brake control unit is in automatic driving mode, the driver exits the automatic driving mode by pressing the "automatic driving system exit button".

[0027] The EBCU abnormally exits the automatic driving mode due to the following four conditions: (1) The EBCU receives the life signal from the autopilot unit and stops jumping for 4 seconds; (2) The EBCU receives the “autopilot mode abnormal exit signal” from the autopilot unit; (3) When the brake control unit is unable to execute the control instructions of the automatic driving unit due to its own failure; (4) The system detects other faults that affect brake control (such as total air pressure being too low).

[0028] After exiting, the system automatically implements penalty braking mode.

[0029] It also includes four pressure sensors, which are installed on the original JZ-7 brake pipeline.

[0030] The electronic brake control unit can collect the pressure values ​​of the individual action pipe, the I and II end balancing air cylinders, the train pipe, the brake cylinder, and the total air cylinder in real time, and the collection cycle is less than 10HZ.

[0031] The communication between EBCU and the automatic driving unit is interrupted (including interruption of life signals and normal communication).

[0032] Guided safety measures: After the brake control unit detects a communication interruption, the system automatically implements the penalty braking mode.

[0033] The EBCU receives a signal of a single acting pipe pressure value that is beyond the control range of the JZ-7 brake machine. Guidance safety measures: The single-pipe target value given by the automatic driving system must be within the range of 0-300kPa. When the EBCU receives a target pressure value higher than 300kPa, only the executable maximum target value (300kPa) is executed, and a target pressure value error prompt message is issued.

[0034] When the button itself fails to send an exit signal to the EBCU Guidance safety measures: After pressing the button, the system prompt still shows that it is in automatic driving mode. The locomotive can use the JZ-7 brake valve large or small gate to brake and stop. After stopping, close all manual plugs on the BCU and forcibly cut off the BCU control, and the JZ-7 brake machine will take over the braking operation again.

[0035] When the "Autopilot Exit Button" fails due to EBCU failure Guidance safety measures: At this time, the phenomenon is that after the automatic driving exit button and the automatic driving system exit command are issued, the system cannot exit the automatic driving mode. The locomotive can use the JZ-7 brake valve large or small gate to brake and stop. After stopping, close all manual gates on the BCU and forcibly cut off the BCU control. The JZ-7 brake machine takes over the braking operation again.

[0036] When the control solenoid valve fails Guided safety measures: The system can determine the solenoid valve failure based on the relevant pressure value. When it is determined that a failure occurs, the system implements a penalty braking mode.

[0037] When the sensor fails due to a malfunction Guided safety measures: The system can determine if a sensor fails. When a single sensor fails, the system activates the redundant sensor. When both sensors fail, the system executes the penalty braking mode and issues a sensor failure prompt message. When other sensors fail, the system only issues a sensor failure prompt message.

[0038] When the JZ-7 brake fails Guidance safety measures: When the JZ-7 brake fails, the system determines that the fault has occurred based on the collected pressure and issues a JZ-7 brake fault prompt.

[0039] Overall safety measures (1) The EBCU power conversion uses two power boards, which are redundant. When one power board fails, the brake control system function will not be affected. When both power boards fail at the same time, the entire system will lose power, and the system switching solenoid valve will automatically switch to manual mode after losing power.

[0040] (2) When the EBCU software unexpectedly terminates or crashes, the system is designed with a two-level fault guidance scheme: the first level is the software watchdog, and the second level is the hardware watchdog. The EBCU operation status can be monitored at any time to ensure the normal operation of the EBCU. See also Figure 1 to Figure 2 , which is the second technical solution provided by the present invention: a separate braking automatic driving control system based on a JZ-7 brake machine, comprising an electronic braking control unit, a separate braking control module unit, an automatic driving exit button unit in the driver's cab and an automatic driving status indicator light unit, wherein the electronic braking control unit is connected to the separate braking module through a cable and to the locomotive through a communication cable, and is used to display the start and stop status of the locomotive, communicate with the locomotive through a pre-set communication protocol, receive communication signals sent by the locomotive and send control signals to the separate braking control module, and also feedback various braking system information collected and determined by the locomotive to the locomotive, the separate braking control unit comprises a solenoid valve, a manual plug door, a pressure sensor, a pressure measuring point, a dust filter, a two-way valve, an air cylinder and an air circuit board and a mounting frame, and its main function is to receive control signals to control the separate braking pressure of the locomotive, the automatic driving exit button unit is used to force the system to exit the automatic driving mode, and the automatic driving status indicator light unit is directly controlled by the electronic braking control unit and is used to display the status of the automatic driving.

[0041] The electronic brake control unit can upload the pressure values ​​of the individual action pipe, the I and II end balancing air cylinders, the train pipe, the brake cylinder, and the total air cylinder in real time, and the response time is less than 100ms.

[0042] The other components in the second technical solution are the same as those in the first technical solution.

[0043] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0044] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A separate braking automatic driving control system based on a JZ-7 brake machine, comprising an electronic brake control unit, a separate brake control module unit, an automatic driving exit button unit in the driver's cab and an automatic driving status indicator light unit, characterized in that: The electronic brake control unit is connected to the separate brake module through a cable and to the locomotive through a communication cable, and is used to display the start and stop status of the locomotive. It communicates with the locomotive through a pre-set communication protocol, receives communication signals from the locomotive and sends control signals to the separate brake control module, and also feeds back various brake system information collected and determined by it to the locomotive. The separate brake control unit is composed of a solenoid valve, a manual plug gate, a pressure sensor, a pressure measuring point, a dust filter, a two-way valve, an air cylinder, and an air circuit board and a mounting frame. Its main function is to receive control signals to control the separate brake pressure of the locomotive. The automatic driving exit button unit is used to force the system to exit the automatic driving mode. The automatic driving status indicator light unit is directly controlled by the electronic brake control unit and is used to display the status of the automatic driving.

2. The independent braking automatic driving control system based on the JZ-7 type brake machine according to claim 1 is characterized in that: The electronic brake control unit has a power-on self-test function, and the detection items include: the pressure sensor is in normal state and the communication with the automatic driving unit is normal. A communication module is provided in the electronic brake control unit for connecting to the locomotive signal.

3. The independent braking automatic driving control system based on the JZ-7 type brake machine according to claim 2 is characterized in that: The power-on self-check function is executed immediately after the locomotive is powered on. If the self-check does not meet the usage conditions, a fault code is sent to the automatic driving unit.

4. The independent braking automatic driving control system based on the JZ-7 type brake machine according to claim 1 is characterized in that: The electronic brake control unit can receive the target pressure value of the separate acting pipe sent by the automatic driving unit in real time, and control the separate acting pipe to charge and exhaust air so that the separate acting pipe reaches the target pressure value.

5. The independent braking automatic driving control system based on the JZ-7 type brake machine according to claim 1 is characterized in that: The brake control unit allows the automatic driving mode to be entered only if all of the following conditions are met: (1) The EBCU self-checks and shows no faults; (2) The EBCU did not detect a brake system fault; (3) The communication between EBCU and the automatic driving unit is normal.

6. The independent braking automatic driving control system based on the JZ-7 type brake machine according to claim 1 is characterized in that: The brake control unit needs to follow the steps below to enter the automatic driving mode: (1) Before the system enters the automatic driving mode, the locomotive must be in a zero-speed parking state and the brake cylinder pressure must be greater than 250 kPa, and 250 kPa is a temporary value; (2) The system can enter the automatic driving mode only after the brake control unit controls the pressure of the separate action pipe to rise to greater than 250 kPa; (3) When the electronic brake control unit receives the rising edge of the "autonomous driving mode activation" signal and both (1) and (2) are met, the system is activated and the brake control unit enters the autonomous driving mode; (4) After entering the automatic driving mode, before the locomotive drives, the driver must ensure that the JZ-7 brake valve single valve and the self-valve handle are in the operating position.

7. The independent braking automatic driving control system based on the JZ-7 type brake machine according to claim 6 is characterized in that: The brake control unit is in automatic driving mode. The driver exits the automatic driving mode by pressing the "automatic driving system exit button".

8. The independent braking automatic driving control system of the JZ-7 type brake machine according to claim 1 is characterized in that: It also includes four pressure sensors, which are installed on the original JZ-7 brake pipeline.

9. The JZ-7 brake machine's independent braking automatic driving control system according to claim 1 is characterized in that: The electronic brake control unit can collect the pressure values ​​of the individual action pipe, the I and II end balancing air cylinders, the train pipe, the brake cylinder, and the total air cylinder in real time, and the collection cycle is less than 10HZ.

10. The independent braking automatic driving control system of the JZ-7 type brake machine according to claim 1 is characterized in that: The electronic brake control unit can upload the pressure values ​​of the individual action pipe, the I and II end balancing air cylinders, the train pipe, the brake cylinder, and the total air cylinder in real time, and the response time is less than 100ms.

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