Automatic control device for railcar brake

Abstract

The utility model discloses a track car brake automatic control device belongs to vehicle monitoring control technical field, include: information acquisition module is used to gather the running state of track car and gathers track car operation data, control processing module judges track car running state according to track car operation data, brake execution module exports control track car brake start -stop according to track car running state, power module is used to provide the working voltage of information acquisition module, control processing module and brake execution module, wireless communication module is used for realizing short -distance data transmission and remote monitoring, the utility model discloses can real -time monitoring whether the engine is normal operation, and when engine is out of oil or accidental fire immediately sends the instruction to motor driver and makes brake motor action realizes the brake shutdown.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle monitoring and control technology, and in particular relates to an automatic braking control device for railcars. Background Technology

[0002] The existing railcar engines are started and stopped by turning the key. If the engine stops, the brakes will also stop working. Especially on uphill sections of track, the MCU will not detect the signal after the engine stops, the brake control will fail, and the vehicle will run away, which will lead to a runaway accident. Utility Model Content

[0003] In view of the above or existing deficiencies, this utility model proposes an automatic braking control device for railcars, which can brake the vehicle when the engine is off.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] This utility model provides an automatic braking control device for railcars, comprising:

[0006] The information acquisition module is used to collect track vehicle operation data to monitor the track vehicle's operating status.

[0007] The control processing module determines the operating status of the railcar based on the railcar's operating data.

[0008] The braking execution module outputs control to start and stop the railcar's brakes based on the railcar's operating status.

[0009] The power supply module provides operating voltage to the information acquisition module, control processing module, and braking execution module.

[0010] A wireless communication module is used to enable short-range data transmission and remote monitoring.

[0011] The information acquisition module is connected to the railcar drive circuit. The output of the information acquisition module is connected to the control processing module. The output of the control processing module is connected to the braking execution module. The output of the braking execution module is connected to the brake motor. The output of the power supply module is connected to the information acquisition module, the control processing module, and the braking execution module. The control processing module is connected to the wireless communication module.

[0012] The information acquisition module is connected to the railcar drive circuit. The output of the information acquisition module is connected to the control processing module. The output of the control processing module is connected to the braking execution module. The output of the braking execution module is connected to the brake motor.

[0013] As a further technical solution of this utility model, the information acquisition module includes:

[0014] The voltage adapter unit has a first impedance element and a second impedance element connected in series to form a voltage divider topology;

[0015] The signal shaping unit includes a rectifier circuit consisting of at least one unidirectional conducting element;

[0016] The noise suppression unit includes a filter circuit consisting of at least one filter capacitor.

[0017] The first impedance element and the second impedance element are connected in series and grounded. The positive terminal of the rectifier diode is connected to the output terminal of the first impedance element, and the output terminal of the unidirectional conduction element is connected to the noise suppression unit.

[0018] As a further technical solution of this utility model, in the voltage adapter unit, the resistance value of the first impedance element is in the range of 10kΩ-100kΩ, and the resistance value of the second impedance element is in the range of 1kΩ-10kΩ, forming an adjustable voltage division ratio of 10:1 to 100:1.

[0019] Furthermore, the control processing module is a TMS320F28379D microcontroller.

[0020] As a further technical solution of this utility model, the braking execution module includes: a motor forward rotation drive circuit and a motor reverse rotation drive circuit;

[0021] The motor forward rotation drive circuit includes a first voltage divider resistor, a first relay, and a first amplifier. The input terminal of the first voltage divider resistor is connected to the output terminal of the control circuit, the output terminal of the first voltage divider resistor is connected to the base of the first amplifier, the collector of the first amplifier is connected to the first relay, the emitter of the first amplifier is grounded, and the output terminal of the first relay is connected to the brake motor.

[0022] The motor reversing drive circuit includes a second voltage divider resistor, a second relay, and a second amplifier. The input terminal of the second voltage divider resistor is connected to the output terminal of the control circuit, the output terminal of the second voltage divider resistor is connected to the base of the second amplifier, the collector of the second amplifier is connected to the second relay, the emitter of the second amplifier is grounded, and the output terminal of the second relay is connected to the brake motor.

[0023] Furthermore, the first and second relays are dual-contact magnetic latching relays with a coil drive voltage of 24VDC and a contact rated current of 30A; the solid-state relay is a zero-crossing triggered AC device with overvoltage protection and current transient suppression functions.

[0024] Furthermore, the first relay is a normally closed relay, and the second relay is a normally open relay.

[0025] As a further technical solution of this utility model, it also includes: a power supply module, the power supply module comprising:

[0026] The main power supply unit is connected to the 24VDC power bus of the railcar;

[0027] Backup power unit, comprising a hybrid energy storage device consisting of supercapacitor banks and lithium battery banks;

[0028] The power switching unit uses a magnetic latching contactor to achieve seamless switching between main and backup power supplies.

[0029] As a further technical solution of this utility model, it also includes a wireless communication module, the wireless communication module comprising:

[0030] Bluetooth Low Energy interface for short-range device debugging;

[0031] LoRa wireless transmission unit for remote status monitoring;

[0032] The GPS positioning module is used to record the geographical location information of braking events.

[0033] The beneficial effects of this utility model are as follows:

[0034] The information acquisition module of this utility model is operatively coupled to the power system of the railcar and configured to acquire the operating status parameters of the railcar in real time. The control processing module is communicatively connected to the information acquisition module and includes at least one microprocessor, configured to generate a braking control signal based on the operating status parameters. The braking execution module is electrically connected to the control processing module and the railcar braking mechanism, and includes a reversible motor drive circuit, configured to respond to the braking control signal to realize the forward drive and reverse release of the braking motor. When the normal operation signal of the engine is sent, it is provided to the MCU after signal voltage division, rectification and filtering. The MCU can monitor whether the engine is operating normally in real time. When the engine runs out of oil or is accidentally shut down, the MCU will not detect the signal and will immediately send a command to the motor driver to make the braking motor move to realize braking and stopping. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A structural diagram of an automatic braking control device for a railcar provided in an embodiment of this utility model;

[0037] Figure 2 A circuit control diagram of an automatic braking control device for a railcar provided for an embodiment of this utility model. Detailed Implementation

[0038] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0039] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0040] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0041] Example

[0042] Figure 1 The present invention provides an automatic braking control device for a railcar according to an embodiment, comprising:

[0043] The information acquisition module 101 is used to collect the operating status of the railcar and obtain the railcar's operating data;

[0044] The control processing module 102 determines the operating status of the railcar based on the railcar's operating data;

[0045] The braking execution module 103 outputs control to start and stop the railcar's brakes based on the railcar's operating status.

[0046] Power module 104 is used to provide operating voltage for the information acquisition module, control processing module and braking execution module;

[0047] Wireless communication module 105 is used to realize short-range data transmission and remote monitoring;

[0048] The information acquisition module 101 is connected to the railcar drive circuit. The output of the information acquisition module 101 is connected to the control processing module 102. The output of the control processing module 102 is connected to the braking execution module 103. The output of the braking execution module 103 is connected to the brake motor. The output of the power module 104 is connected to the information acquisition module 101, the control processing module 102 and the braking execution module 103. The control processing module 102 is connected to the wireless communication module 105.

[0049] In this embodiment of the invention, the information acquisition module is operatively coupled to the railcar power system and configured to acquire the railcar's operating status parameters in real time; the control processing module is communicatively connected to the information acquisition module, includes at least one microprocessor, and is configured to generate a braking control signal based on the operating status parameters; the braking execution module is electrically connected to the control processing module and the railcar braking mechanism, includes a reversible motor drive circuit, and is configured to respond to the braking control signal to realize the forward drive and reverse release of the braking motor.

[0050] In this embodiment of the present invention, when the engine is running normally, the signal is provided to the MCU after being divided, rectified and filtered. The MCU can monitor whether the engine is running normally in real time. When the engine runs out of oil or stalls unexpectedly, the MCU will not detect the signal and will immediately send a command to the motor driver to make the brake motor move to stop the engine.

[0051] In this embodiment of the utility model, the information acquisition module 101 includes:

[0052] The voltage adapter unit 111 has a first impedance element and a second impedance element connected in series to form a voltage divider topology;

[0053] The signal shaping unit 112 includes a rectifier circuit consisting of at least one unidirectional conducting element;

[0054] The noise suppression unit 113 includes a filter circuit consisting of at least one filter capacitor.

[0055] The first impedance element and the second impedance element are connected in series and grounded. The positive terminal of the rectifier diode is connected to the output terminal of the first impedance element, and the output terminal of the unidirectional conduction element is connected to the noise suppression unit.

[0056] The first impedance element in the voltage adapter unit has a resistance range of 10kΩ-100kΩ, and the second impedance element has a resistance range of 1kΩ-10kΩ, forming an adjustable voltage division ratio of 10:1 to 100:1.

[0057] The noise suppression unit includes an electrolytic capacitor and a ceramic capacitor connected in parallel. The capacitance of the electrolytic capacitor ranges from 100μF to 1000μF, and the capacitance of the ceramic capacitor ranges from 0.1μF to 1μF.

[0058] In this embodiment of the utility model, the control processing module is a TMS320F28379D microcontroller, which is a dual-core C28x+Cortex-M4 and supports a CAN 2.0B bus interface, suitable for use in railcar braking systems.

[0059] The control processing module includes an embedded controller with a CAN bus interface, configured to: calculate the instantaneous acceleration value of the railcar in real time; generate an emergency braking signal when the rate of change of acceleration exceeds a first threshold; and generate a brake release signal when the speed value is lower than a second threshold.

[0060] In this embodiment of the present invention, the braking execution module 103 includes: a motor forward rotation drive circuit 131 and a motor reverse rotation drive circuit 132;

[0061] The forward rotation drive circuit of the motor includes a first voltage divider resistor, a first relay, and a first amplifier. The input terminal of the first voltage divider resistor is connected to the output terminal of the control circuit, the output terminal of the first voltage divider resistor is connected to the base of the first amplifier, the collector of the first amplifier is connected to the first relay, the emitter of the first amplifier is grounded, and the output terminal of the first relay is connected to the brake motor.

[0062] The motor reversing drive circuit includes a second voltage divider resistor, a second relay, and a second amplifier. The input terminal of the second voltage divider resistor is connected to the output terminal of the control circuit, the output terminal of the second voltage divider resistor is connected to the base of the second amplifier, the collector of the second amplifier is connected to the second relay, the emitter of the second amplifier is grounded, and the output terminal of the second relay is connected to the brake motor.

[0063] See Figure 2 The normal operation signal of the engine is divided by the first impedance element R1 and the second impedance element R2, and then rectified by the first diode D1 and filtered by the first capacitor to obtain the sampled voltage signal. The TMS320F28379D microcontroller analyzes the sampled voltage signal to determine whether the transmitter is operating normally. When the transmitter runs out of oil or is accidentally shut down, the microcontroller will not detect the signal and will immediately issue a command to activate or deactivate the first relay / second relay through the first current limiting resistor and the second current limiting resistor, the first amplifier Q1 and the second amplifier Q2, so as to realize the forward or reverse rotation of the brake motor and achieve braking and stopping.

[0064] In this embodiment of the invention, the first relay and the second relay are double-contact magnetic latching relays with a coil drive voltage of 24VDC and a contact rated current of 30A. The solid-state relay is a zero-crossing triggered AC device with overvoltage protection and current transient suppression functions. The first relay is a normally closed relay, and the second relay is a normally open relay.

[0065] In this embodiment of the utility model, the power module includes: a main power supply unit connected to the 24VDC power bus of the railcar; a backup power supply unit comprising a hybrid energy storage device consisting of a supercapacitor group and a lithium battery group; and a power switching unit that uses a magnetic holding contactor to achieve seamless switching between the main and backup power supplies.

[0066] The wireless communication module includes: a Bluetooth Low Energy (BLE) interface for short-range device debugging; a LoRa wireless transmission unit for remote status monitoring; and a GPS positioning module for recording the geographical location information of braking events.

[0067] Furthermore, although the operation of the method of this invention is described in a specific order in the accompanying drawings, this does not require or imply that the operations must be performed in that specific order, or that all the operations shown must be performed to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

Claims

1. An automatic braking control device for a railcar, characterized in that, include: The information acquisition module is used to collect track vehicle operation data to monitor the track vehicle's operating status. The control processing module determines the operating status of the railcar based on the railcar's operating data. The braking execution module outputs control to start and stop the railcar's brakes based on the railcar's operating status. The power supply module provides operating voltage to the information acquisition module, control processing module, and braking execution module. A wireless communication module is used to enable short-range data transmission and remote monitoring. The information acquisition module is connected to the railcar drive circuit. The output of the information acquisition module is connected to the control processing module. The output of the control processing module is connected to the braking execution module. The output of the braking execution module is connected to the brake motor. The output of the power supply module is connected to the information acquisition module, the control processing module, and the braking execution module. The control processing module is connected to the wireless communication module.

2. The automatic braking control device for a railcar according to claim 1, characterized in that, The information collection module includes: The voltage adapter unit has a voltage divider topology formed by a first impedance element and a second impedance element connected in series; the signal shaping unit includes a rectifier circuit consisting of at least one unidirectional conducting element. The noise suppression unit includes a filter circuit consisting of at least one filter capacitor. The first impedance element and the second impedance element are connected in series and grounded. The positive terminal of the rectifier circuit is connected to the output terminal of the first impedance element, and the output terminal of the unidirectional conduction element is connected to the noise suppression unit.

3. The automatic braking control device for a railcar according to claim 2, characterized in that, In the voltage adapter unit, the resistance value of the first impedance element is in the range of 10kΩ-100kΩ, and the resistance value of the second impedance element is in the range of 1kΩ-10kΩ, forming an adjustable voltage division ratio of 10:1 to 100:

1.

4. The automatic braking control device for a railcar according to claim 1, characterized in that, The control processing module is a TMS320F28379D microcontroller.

5. The automatic braking control device for a railcar according to claim 1, characterized in that, The braking execution module includes: a motor forward rotation drive circuit and a motor reverse rotation drive circuit; The motor forward rotation drive circuit includes a first voltage divider resistor, a first relay, and a first amplifier. The input terminal of the first voltage divider resistor is connected to the output terminal of the control circuit, the output terminal of the first voltage divider resistor is connected to the base of the first amplifier, the collector of the first amplifier is connected to the first relay, the emitter of the first amplifier is grounded, and the output terminal of the first relay is connected to the brake motor. The motor reversing drive circuit includes a second voltage divider resistor, a second relay, and a second amplifier. The input terminal of the second voltage divider resistor is connected to the output terminal of the control circuit, the output terminal of the second voltage divider resistor is connected to the base of the second amplifier, the collector of the second amplifier is connected to the second relay, the emitter of the second amplifier is grounded, and the output terminal of the second relay is connected to the brake motor.

6. The automatic braking control device for a railcar according to claim 5, characterized in that, The first and second relays are double-contact magnetic latching relays with a coil drive voltage of 24VDC and a contact rated current of 30A.

7. The automatic braking control device for a railcar according to claim 6, characterized in that, The first relay is a normally closed relay, and the second relay is a normally open relay.

8. The automatic braking control device for a railcar according to claim 1, characterized in that, Also includes: Power module, the power module comprising: The main power supply unit is connected to the 24VDC power bus of the railcar. The backup power unit comprises a hybrid energy storage device consisting of a supercapacitor bank and a lithium battery bank; the power switching unit uses a magnetic latching contactor to achieve seamless switching between main and backup power supplies.

9. The automatic braking control device for a railcar according to claim 1, characterized in that, It also includes a wireless communication module, which includes: Bluetooth Low Energy interface for short-range device debugging; LoRa wireless transmission unit for remote status monitoring; The GPS positioning module is used to record the geographical location information of braking events.

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