Train running gear smoothness isolation detection device

Abstract

This utility model discloses a train running gear stability isolation detection device, belonging to the field of transportation. The device consists of a sensor module, a relay module, a data acquisition and processing circuit, an optocoupler circuit, an MCU control circuit, a power supply circuit, and an input power supply. The sensor module acquires the three-dimensional acceleration of the running gear and outputs signals; the relay module isolates the sensor self-test signals, ensuring that self-testing and acquisition do not interfere with each other; the data acquisition and processing circuit filters and performs A / D conversion on the acceleration signals; the optocoupler circuit isolates the acquired serial data before sending it to the MCU; the MCU performs stability judgment based on acceleration thresholds and outputs control commands. The power supply circuit, based on the input, completely isolates the power supply from the sensor side and the MCU side through an isolation power supply module, while providing different voltage levels to various functional circuits. This structure achieves a fully isolated design for signals, control, and power supply, reducing the risk of electrical interference and cascading damage from module failures, and improving the reliability and maintenance efficiency of train running gear stability detection.

Description

Technical Field

[0001] This application relates to the field of transportation, and in particular to a train running gear stability isolation detection device. Background Technology

[0002] In modern train operation, the smoothness of the running gear is a crucial factor in ensuring train safety and comfort. Acceleration fluctuations in the train's running gear directly affect its smoothness, thus impacting passenger comfort and train safety. Therefore, timely detection and monitoring of acceleration data from the train's running gear are essential for smoothness detection and fault diagnosis. Traditional acceleration acquisition and processing systems often suffer from the following problems.

[0003] Electrical interference issues. Electrical interference is prone to occur between sensor modules and data acquisition circuits, especially with high-frequency signals, leading to inaccurate data transmission and affecting system reliability. Insufficient signal and power isolation. Many existing systems fail to effectively isolate power and signals, making them susceptible to power failures or signal interference, increasing the probability of system malfunctions and maintenance costs. High maintenance costs. Due to the lack of effective isolation design between modules, the entire system may require extensive inspection and repair in the event of a failure, increasing operation and maintenance costs. Utility Model Content

[0004] This invention provides a train running gear stability isolation detection device, which can solve the aforementioned problems existing in related technologies.

[0005] A train running gear stability isolation detection device is provided, the device comprising:

[0006] The sensor module is used to collect acceleration data of the train's running gear;

[0007] A relay module is connected to the self-test signal input terminal of the sensor module and is used to isolate and control the self-test signal of the sensor module.

[0008] A data acquisition and processing circuit is connected to the acceleration signal output terminal of the sensor module and is used to process and acquire the acceleration data.

[0009] An optocoupler circuit, connected to the data acquisition and processing circuit, is used to isolate the serial data output by the data acquisition and processing circuit.

[0010] The MCU control circuit, connected to the optocoupler circuit, has judgment and response functions, and is used to judge the state and control the further actions of the system based on the acceleration data transmitted by the data acquisition and processing circuit.

[0011] The power supply circuit isolates the MCU control circuit from the sensor module through a built-in isolation power supply module and supplies power to the sensor circuit and the data acquisition and processing circuit.

[0012] Input power is provided by an external backplane connector.

[0013] Optionally, the power supply circuit includes an MCU power supply circuit and a sensor power supply circuit;

[0014] The MCU power supply circuit includes an LDO power chip and a DC-DC power chip that supply power to the MCU control circuit. The LDO power chip and the DC-DC power chip are not isolated from the input power supply. The LDO power chip is used to generate a 3.3V power supply, and the DC-DC power chip is used to generate a 5V power supply.

[0015] The sensor power supply circuit includes an analog power supply non-isolated chip and the isolated power supply module. The sensor power supply circuit is isolated from the input power supply through the isolated power supply module. The isolated power supply module outputs a first power supply, which supplies power to the sensor circuit on one hand, and generates a second power supply through the analog power supply non-isolated chip on the other hand. The second power supply is used to supply power to the data acquisition and processing circuit and the optocoupler circuit.

[0016] Optionally, the input power supply is 12V, the first power supply is 12V, and the second power supply is 5V.

[0017] Optionally, the MCU control circuit includes a first MCU control circuit and a second MCU control circuit; the sensor module includes a first sensor and a second sensor; the relay module includes two relays corresponding to the connections of the first sensor and the second sensor respectively; the data acquisition and processing circuit consists of two low-pass filters and two AD acquisition chips.

[0018] The optocoupler circuit includes multiple optocoupler isolation components, each of which is located between each AD acquisition chip and each MCU control circuit.

[0019] Optionally, the analog power supply non-isolated chip includes a first analog power supply chip and a second analog power supply chip;

[0020] The isolated power supply module includes a first isolation module and a second isolation module.

[0021] Optionally, the low-pass filter is a MAX7410 type, the AD acquisition chip is an ADS8343 type, the optocoupler isolation component is an HCPL063L type, and the MCU control circuit is an STC12C5A60S2 type.

[0022] Optionally, the LDO power chip is a TLV1117, the DC-DC power chip is a TPS5430, the analog power non-isolated chip is a MIC29302, and the isolated power module is a URB2412YMD-10WR3.

[0023] Optionally, the acceleration signal of the sensor module is a 4-20mA signal.

[0024] This utility model discloses a train running gear stability isolation detection device, which consists of a sensor module, a relay module, a data acquisition and processing circuit, an optocoupler circuit, an MCU control circuit, a power supply circuit, and an input power supply. The sensor module acquires the three-dimensional acceleration of the running gear and outputs a 4-20mA signal; the relay module isolates the sensor self-test signal, ensuring that self-testing and data acquisition do not interfere with each other; the data acquisition and processing circuit filters and performs A / D conversion on the acceleration signal; the optocoupler circuit isolates the acquired serial data before sending it to the MCU; the MCU performs stability judgment based on the acceleration threshold and outputs control commands. The power supply circuit, based on a 12V input, completely isolates the power supply from the sensor side and the MCU side through an isolation power supply module, while simultaneously providing 12V and 5V voltages to various functional circuits. This structure achieves complete isolation of signals, control, and power supply, significantly reducing the risk of electrical interference and cascading damage from module failures, and improving the reliability and maintenance efficiency of train running gear stability detection. Attached Figure Description

[0025] Figure 1 This is a block diagram of a stable data acquisition scheme provided in an illustrative embodiment of this application;

[0026] Figure 2 This is a block diagram of a power supply scheme provided in an illustrative embodiment of this application;

[0027] Figure 3 This is a block diagram illustrating the overall hardware implementation scheme of an embodiment of this application. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0029] First, the design concept of the embodiments of this application is analyzed in conjunction with the background technology. Stability detection determines whether the train is stable by detecting acceleration information in three directions from a stability sensor: vertical acceleration, longitudinal acceleration, and lateral acceleration. The acceleration information is input to the acquisition board via a 4-20mA signal. After filtering and ADC acquisition, the data is transmitted to the MCU for processing. The MCU makes a corresponding judgment based on a set threshold.

[0030] Some existing signal acquisition systems transmit data directly to the MCU after analog-to-digital converter (ADC) acquisition, without isolation between signal acquisition and processing, and without power isolation between the sensor and the acquisition board. The drawback of this architecture is that if a short circuit occurs in the sensor module, the power and signal interaction between the sensor module and the acquisition board can cause damage to the acquisition board. Similarly, a short circuit in the acquisition board can also damage the sensor module. In either case, both the sensor module and the acquisition board may need to be replaced simultaneously, increasing maintenance costs.

[0031] This invention improves upon the aforementioned functions by adding an isolation circuit between the power supply and signal of the sensor module and the power supply and signal of the acquisition board, thus electrically isolating the two. In this architecture, if any module fails, only the faulty module needs to be replaced, reducing maintenance costs. The solution will be further described below through various embodiments.

[0032] Example 1

[0033] This application provides a train running gear stability isolation detection device, which includes the following structure. Please refer to... Figures 1 to 3 , Figure 1 A block diagram of a stable data acquisition scheme is shown. Figure 2 A power supply scheme block diagram is shown. Figure 3 A block diagram of the overall hardware implementation scheme is shown.

[0034] The sensor module is used to collect acceleration data of the train's running gear. The relay module is connected to the self-test signal input terminal of the sensor module and is used to isolate and control the self-test signal of the sensor module.

[0035] The data acquisition and processing circuit is connected to the acceleration signal output terminal of the sensor module and is used to process and acquire acceleration data. The acceleration signal of the sensor module is a 4-20mA signal.

[0036] Optocoupler circuit, connected to data acquisition and processing circuit, is used to isolate the serial data output by the data acquisition and processing circuit.

[0037] The MCU control circuit, connected to the optocoupler circuit, has judgment and response functions. It is used to judge the state based on the acceleration data transmitted by the data acquisition and processing circuit and control the further actions of the system.

[0038] The power supply circuit isolates the MCU control circuit from the sensor module through the built-in isolation power supply module and supplies power to the sensor circuit and data acquisition and processing circuit.

[0039] Input power is provided by an external backplane connector.

[0040] In summary, this design achieves the following improvements: Optical isolation is used for data acquisition and processing from the stability sensor; an isolated power supply module is used for the power supply; and relay isolation is used for the self-test signal. This achieves full isolation between the signal and power supply, making the stability sensor module relatively independent from the data acquisition and processing board, thus reducing maintenance costs.

[0041] Example 2

[0042] Optionally, the power supply circuit includes an MCU power supply circuit and a sensor power supply circuit.

[0043] The MCU power supply circuit includes an LDO power supply chip and a DC-DC power supply chip to power the MCU control circuit. The LDO power supply chip and the DC-DC power supply chip are not isolated from the input power supply. The LDO power supply chip is used to generate a 3.3V power supply, and the DC-DC power supply chip is used to generate a 5V power supply.

[0044] The sensor power supply circuit includes an analog power supply non-isolated chip and an isolated power supply module. The sensor power supply circuit is isolated from the input power supply through the isolated power supply module. The isolated power supply module outputs a first power supply, which supplies power to the sensor circuit on one hand, and generates a second power supply through the analog power supply non-isolated chip on the other hand. The second power supply is used to supply power to the data acquisition and processing circuit and the optocoupler circuit.

[0045] Optionally, the input power supply is 12V, the first power supply is 12V, and the second power supply is 5V.

[0046] Example 3

[0047] Optionally, the MCU control circuit includes a first MCU control circuit and a second MCU control circuit; the sensor module includes a first sensor ( Figure 3 Medium-stability sensor 1) and second sensor ( Figure 3 Medium stability sensor 2).

[0048] The relay module includes two relays ( Figure 3 The relays (2 in the diagram) correspond to the connections of the first and second sensors, respectively. The data acquisition and processing circuit consists of two low-pass filters and two AD acquisition chips. Figure 3 It consists of AD acquisition components (marked in the text).

[0049] The first and second sensors are steady-state sensors, powered by 12V, and output a 4-20mA signal. Specifically, the steady-state sensor outputs a 4-20mA current signal, which is connected to a 220Ω resistor on the acquisition board, generating a voltage of 0.88V-4.4V across the resistor. This voltage signal passes through a MAX7410 low-pass filter and is then acquired by the ADS8343 ADC chip. The ADC chip's digital interface SPI communicates with the MCU via an optocoupler, achieving isolation between steady-state signal acquisition and data processing.

[0050] The self-test signal of the stable sensor is isolated by a G5V-1-5V relay. The optocoupler circuit includes multiple optocoupler isolation components. Each optocoupler isolation component is set between each AD acquisition chip and each MCU control circuit. The specific number of optocoupler isolation components can be customized according to actual design requirements. In this embodiment, the number is 3.

[0051] Example 4

[0052] Optionally, the non-isolated analog power supply chip includes a first analog power supply chip ( Figure 3 5V analog power supply 1) and second analog power supply chip ( Figure 3 The 5V analog power supply 2), the isolated power supply module includes a first isolation module ( Figure 3 Medium isolation power supply 1) and second isolation module ( Figure 3 The isolated power supply 2) forms two paths.

[0053] Example 5

[0054] Optionally, the low-pass filter is MAX7410, the AD acquisition chip is ADS8343, the optocoupler isolation component is HCPL063L, and the MCU control circuit is STC12C5A60S2.

[0055] Optionally, the LDO power supply chip is TLV1117, the DC-DC power supply chip is TPS5430, the analog power supply non-isolated chip is MIC29302, and the isolated power supply module is URB2412YMD-10WR3.

[0056] The MAX7410 low-pass filter is a Butterworth filter with a maximum corner frequency of 15kHz. The ADS8343 ADC converter chip is a 4-channel 16-bit successive approximation ADC chip with a conversion rate of up to 100kHz. The HCPL063L optocoupler has a high-speed transmission rate of 15Mbps. The STC12C5A60S2 MCU chip operates at 5V and has a frequency range of 0-35MHz.

[0057] Additionally, the 12V isolated power supply URB2412YMD-10WR3 has an input voltage range of 9-36VDC, a maximum output current of 0.8A, and an output voltage of 12VDC; the relay G5V-1-5V has a coil voltage of 5V, a rated current of 30mA, and a rated load of 0.5A@125VAC; 1A@24VDC.

[0058] Therefore, Figure 3 To further explain the structure and principle of the board shown, the board includes digital and analog circuits. A DC +12V power supply is input on the backplane, which outputs a 5V voltage through the DCDC power chip TPS5430 to power the MCU-related digital circuits. This 5V power supply is input to the LDO power chip TLV1117 to output 3.3V, which powers the 3.3V side of the level conversion chip.

[0059] The DC+12V power supply on the back panel is simultaneously input to two isolated power modules URB2412YMD-10WR3, which output two isolated 12V. Each isolated 12V is filtered and a fuse is used to generate two 12V power supplies to power two stable sensors.

[0060] The two isolated 12V outputs from the URB2412YMD-10WR3 isolated power supply modules are each input to the LDO power module MIC29302, which outputs two 5V channels. The first 5V channel provides analog power to the steady-state sensor 1 acquisition circuit, including a MAX7410 low-pass filter, an ADS8343 AD converter chip, a REF5025 voltage reference chip, and an HCPL063L optocoupler. The second 5V channel provides analog power to the steady-state sensor 2 acquisition circuit, including a MAX7410 low-pass filter, an ADS8343 AD converter chip, a REF5025 voltage reference chip, and an HCPL063L optocoupler.

[0061] Furthermore, the data acquisition of each stable sensor is realized by an AD chip with an SPI interface. The SPI interface communicates with the MCU through optocoupler isolation, and the self-test signal of the stable sensor is isolated by a G5V-1-5V relay.

[0062] In addition, the following examples of models that can be used in actual designs are given.

[0063] Optical couplers, not limited to AVAGO's HCPL-063L-000E, include domestic and international optical coupler chips such as TOSHIBA, VISHAY, Renesas, and Lite-On Technology, such as Renesas' PS9821-2, which has a high speed of 15Mbps and provides 5V power supply.

[0064] Isolated power supply modules are not limited to Mornsun's URB2412YMD-10WR3 isolated power supply, but also include isolated power supplies from domestic and foreign companies such as TI, ADI, Mean Well, and E-Chuan, such as E-Chuan's URB2412LD-30WR3, with an input voltage of 9-36VDC, an output voltage of 12V, an output current of 2.5A, and an efficiency of 90%.

[0065] Relay modules are not limited to OMRON's G5V-1-5V relays, but also include domestic and foreign relays such as Schneider Electric, Panasonic, Siemens, and HKE (Hui Gang), such as HKE's HRB1-S-DC5V, with a coil voltage of 5VDC, a coil power of 150mW, and a contact resistance of Max. 50mΩ (6VDC 0.1A).

[0066] The above are merely optional embodiments and optional component models of this application, and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A train running gear smoothness isolation detection apparatus, characterized by, The device includes: The sensor module is used to collect acceleration data of the train's running gear; A relay module is connected to the self-test signal input terminal of the sensor module and is used to isolate and control the self-test signal of the sensor module. A data acquisition and processing circuit is connected to the acceleration signal output terminal of the sensor module and is used to process and acquire the acceleration data. An optocoupler circuit, connected to the data acquisition and processing circuit, is used to isolate the serial data output by the data acquisition and processing circuit. The MCU control circuit, connected to the optocoupler circuit, has judgment and response functions, and is used to judge the state and control the further actions of the system based on the acceleration data transmitted by the data acquisition and processing circuit. The power supply circuit isolates the MCU control circuit from the sensor module through a built-in isolation power supply module and supplies power to the sensor module and the data acquisition and processing circuit. Input power is provided by an external backplane connector.

2. The apparatus of claim 1, wherein, The power supply circuit includes an MCU power supply circuit and a sensor power supply circuit; The MCU power supply circuit includes an LDO power chip and a DC-DC power chip that supply power to the MCU control circuit. The LDO power chip and the DC-DC power chip are not isolated from the input power supply. The LDO power chip is used to generate a 3.3V power supply, and the DC-DC power chip is used to generate a 5V power supply. The sensor power supply circuit includes an analog power supply non-isolated chip and the isolated power supply module. The sensor power supply circuit is isolated from the input power supply through the isolated power supply module. The isolated power supply module outputs a first power supply, which supplies power to the sensor module on one hand and generates a second power supply through the analog power supply non-isolated chip on the other hand. The second power supply is used to supply power to the data acquisition and processing circuit and the optocoupler circuit.

3. The apparatus of claim 2, wherein, The input power supply is 12V, the first power supply is 12V, and the second power supply is 5V.

4. The apparatus according to claim 2, characterized in that, The MCU control circuit includes a first MCU control circuit and a second MCU control circuit; the sensor module includes a first sensor and a second sensor; the relay module includes two relays respectively corresponding to the connection of the first sensor and the second sensor; the data acquisition and processing circuit consists of two low-pass filters and two AD acquisition chips. The optocoupler circuit includes multiple optocoupler isolation components, each of which is located between each AD acquisition chip and each MCU control circuit.

5. The apparatus of claim 2, wherein, The analog power supply non-isolated chip includes a first analog power supply chip and a second analog power supply chip. The isolated power supply module includes a first isolation module and a second isolation module.

6. The apparatus of claim 4, wherein, The low-pass filter is a MAX7410 type, the AD acquisition chip is an ADS8343 type, the optocoupler isolation component is an HCPL063L type, and the MCU control circuit is an STC12C5A60S2 type.

7. The apparatus of claim 2, wherein, The LDO power supply chip is a TLV1117 type, the DC-DC power supply chip is a TPS5430 type, the analog power supply non-isolated chip is a MIC29302 type, and the isolated power supply module is a URB2412YMD-10WR3 type.

8. The apparatus of any one of claims 2 to 7, wherein, The acceleration signal of the sensor module is a 4-20mA signal.

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