Bogie transverse acceleration sensor and construction method thereof

Abstract

The invention discloses a bogie transverse acceleration sensor and a construction method thereof, and the sensor comprises a circuit board assembly (PCBA), a speed signal collection module, a power supply management module, a signal adjustment module, a signal output interface, an anti-interference housing, a connector assembly and a cable assembly. According to the invention, transverse acceleration data is accurately measured, low-noise and high-sensitivity signal output is realized by using a high-precision digital-to-analog conversion circuit and an amplification filtering module, stable and accurate transverse acceleration data can be provided in a complex working environment of a railway bogie, and in addition, the framework of the invention integrates multiple power supply protection circuits and temperature compensation, so that the reliability of the system is improved. The sensor can still operate reliably in an extreme temperature and power supply fluctuation environment, and through the low-power-consumption power supply management module and the anti-electromagnetic interference shell, the energy consumption of the sensor is reduced, and the signal stability in a high-interference environment is improved.

Description

Technical Field

[0001] The present invention relates to the field of railway vehicle sensing technology, and in particular to a bogie lateral acceleration sensor and a construction method thereof. Background Art

[0002] With the development of railway transportation technology, the speed and load of railway vehicles are constantly increasing, and the requirements for train running stability and safety are also increasing. As a key component of railway vehicles, the dynamic characteristics of bogies directly affect the running stability of trains. During operation, bogies are subject to lateral acceleration from the track, and the fluctuation of lateral acceleration may cause lateral vibration of bogies, which in turn affects the safety of trains and the comfort of passengers.

[0003] Existing acceleration sensors are mainly used for monitoring the longitudinal and vertical acceleration of vehicles. There is a lack of high-precision sensors specifically for the lateral acceleration of bogies. Ordinary acceleration sensors often cannot adapt to the complex electromagnetic interference and extreme temperature changes in the railway environment, and it is difficult to provide stable lateral acceleration data.

[0004] Based on this, a bogie lateral acceleration sensor and a construction method thereof are needed. Summary of the invention

[0005] To achieve the above object, the present invention provides the following solution: a lateral acceleration sensor for a bogie and an architecture method thereof, wherein the sensor comprises a circuit board PCBA, a speed signal acquisition module, a power management module, a signal conditioning module, a signal output interface, an anti-interference housing, a connector assembly and a cable assembly, and the sensor realizes accurate acquisition and output of lateral acceleration through the following architecture steps:

[0006] The lateral acceleration data of the bogie is collected by the Murata SCA3300-D01 three-axis acceleration sensor chip in the acceleration signal acquisition module installed on the circuit board PCBA. The acceleration detection direction is the y-axis, and the range is ±2g. The chip outputs the acceleration signal in digital format through the SPI interface;

[0007] The digital acceleration signal is converted into an analog voltage signal by using a digital-to-analog conversion circuit on the circuit board PCBA. The center voltage of the analog voltage signal is set to 5V, and a voltage offset of ±1.23V is generated with the change of ±1g acceleration, so as to generate a voltage output signal corresponding to the lateral acceleration. The amplifier circuit and low-pass filter circuit of the circuit board PCBA adjust the analog voltage signal. The cutoff frequency of the filter circuit is 30Hz, and the signal is attenuated to -70dB at 100Hz, so as to suppress high-frequency interference and ensure the stability and clarity of the signal.

[0008] The power management module provides power to the sensor through the DC24V input power interface, and the power conversion circuit converts the input voltage into the working voltage for the acceleration signal acquisition module and the signal conditioning module, ensuring that the sensor operates stably within the voltage range of 14.4V to 33.6V and meets the power supply requirements of railway applications;

[0009] The signal output interface transmits the regulated analog voltage signal to the host computer end. The signal output interface supports DC5V+ output voltage and provides at least 5mA output current to ensure efficient reception and accurate reading of the signal at the host computer end;

[0010] The anti-interference housing is electrically isolated from the outside through a signal ground, and adopts a grounding design that complies with the EN50121-3-2:2016 electromagnetic compatibility standard, which is used to suppress the influence of external electromagnetic interference on the sensor signal and ensure the normal operation of the sensor in a complex electromagnetic environment;

[0011] The material and sealing structure of the anti-interference housing meet the IP68 protection level and support a temperature range of -50°C to +85°C.

[0012] Further preferably, the sensor chip in the acceleration signal acquisition module outputs lateral acceleration data through an SPI interface, has an applicable temperature range of -50°C to +100°C, and has an acceleration detection range of ±2g. The chip is directly connected to the digital-to-analog conversion circuit in the signal conditioning module through a preset interface to realize continuous acquisition and transmission of acceleration signals.

[0013] Further preferably, the power management module is used to ensure that the sensor remains stable within the input voltage fluctuation range through overvoltage and undervoltage protection, and the overvoltage and undervoltage protection are used for the voltage interval between the operating voltage of 14.4V and 33.6V;

[0014] The power management module includes an overvoltage protection circuit and an undervoltage protection circuit. When the input voltage exceeds the set range, the protection circuit starts and cuts off the power supply of the sensor to protect the safety of internal components. The power management module is directly connected to the power interface of the sensor to provide stable power supply for signal acquisition and processing of the sensor.

[0015] Further preferably, the low-pass filter circuit of the signal conditioning module is a third-order Butterworth filter, the cut-off frequency of the filter is 30 Hz, the filter circuit includes a group of resistor and capacitor networks, configured to achieve -70 dB attenuation at a frequency of 100 Hz, the input end of the filter circuit is connected to the digital-to-analog conversion circuit, and the output end is connected to the signal output interface for controlling the frequency response range of the signal, and the third-order Butterworth filter is integrated into the signal conditioning module through modularization, and is combined with the digital-to-analog conversion circuit and the amplification circuit.

[0016] Further preferably, the signal output interface includes a DC5V+ output pad, and the pad interface is capable of withstanding a maximum current output of 10mA. The DC5V+ output pad is directly connected to the signal conditioning module as an analog output interface of the acceleration signal to adapt to different input interface impedance requirements of the host computer.

[0017] Further preferably, the anti-interference shell is made of aluminum alloy, and the surface of the anti-interference shell is anodized, the thickness of the anodized layer is at least 12 μm, and the aluminum alloy material of the anti-interference shell meets the corrosion resistance and impact resistance requirements, and is used to provide mechanical protection and electromagnetic shielding.

[0018] Further preferably, the protection level of the anti-interference housing complies with the IP68 standard, is waterproof and dustproof, and can continuously work for at least 30 minutes at a depth of 1 meter in water. The anti-interference housing is tightly matched with the internal structure through a sealing ring, and a waterproof sealing ring is provided in the connector area of ​​the anti-interference housing.

[0019] Further preferably, the anti-interference housing is sealed with sealant, and the hardness of the sealant is 40HA. The sealant is encapsulated on the surface of the internal components of the anti-interference housing to fix and protect the internal structure of the anti-interference housing.

[0020] Further preferably, the acceleration calibration data of the sensor is stored by ASIC, and consistency detection is automatically performed every 1000 hours, the calibration data set in the ASIC includes acceleration range and offset calibration information, and the sensor starts calibration consistency detection once every 1000 hours.

[0021] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0022] The sensor of the present invention adopts a dedicated three-axis acceleration sensor chip to accurately measure the lateral acceleration data, and uses a high-precision digital-to-analog conversion circuit and an amplification and filtering module to achieve low-noise, high-sensitivity signal output, and can provide stable and accurate lateral acceleration data in the complex working environment of the railway bogie. In addition, the architecture of the present invention integrates multiple power protection circuits and temperature compensation, so that the sensor can still maintain reliable operation in extreme temperature and power supply fluctuation environments. Through the low-power power management module and the anti-electromagnetic interference shell, the sensor of the present invention not only reduces energy consumption, but also improves signal stability in high interference environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a structural diagram of the sensor of the present invention;

[0025] Figure 2 This is a diagram showing the internal structure of the sensor of the present invention;

[0026] Figure 3 This is a PCBA architecture diagram of the circuit board of the present invention.

[0027] Figure numerals: 10, circuit board PCBA; 11, acceleration signal acquisition module; 12, power management module; 13, signal conditioning module; 14, signal output interface; 15, anti-interference housing; 16, connector assembly; 17, cable assembly. DETAILED DESCRIPTION

[0028] 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.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Example

[0031] like Figure 1-3As shown, a lateral acceleration sensor for a bogie and its architecture method in this embodiment, the sensor is used for lateral acceleration detection of a railway bogie, so as to achieve stable monitoring and data output during the operation of a high-speed train. The sensor adopts a modular integrated architecture, and arranges multiple modules on a circuit board PCBA10 to achieve a complete process from signal acquisition to data output. The sensor mainly includes an acceleration signal acquisition module 11, a power management module 12, a signal conditioning module 13, a signal output interface 14, an anti-interference housing 15, a connector assembly 16 and a cable assembly 17. All modules are arranged around the circuit board PCBA10, and electrical isolation and shielding protection are achieved in the anti-interference housing 15.

[0032] Circuit board PCBA10 is the core carrier platform of the sensor, carrying various functional modules and necessary signal wiring. PCBA is a four-layer multi-layer structure to meet the high-density circuit requirements of the sensor. Circuit board PCBA10 wiring adopts layered isolation and electromagnetic shielding. There is a ground layer isolation between the signal layer and the power layer to reduce the impact of high-frequency noise and enhance signal stability. The acceleration signal acquisition module 11 in the main wiring is directly connected to the digital-to-analog conversion circuit in the signal conditioning module 13. The working rate of its SPI interface is as high as 2Mbps, which can realize fast data acquisition and transmission and avoid measurement errors caused by signal delays.

[0033] The acceleration signal acquisition module 11 adopts Murata SCA3300-D01 three-axis acceleration sensor chip. This chip is based on micro-electromechanical system MEMS technology and has high sensitivity and low noise characteristics. The sensor chip integrates temperature compensation circuit and zero drift correction circuit, which effectively reduces the impact of external environmental temperature changes on detection accuracy. The module sets the detection range to ±2g, and the accuracy reaches 0.01g, which meets the detection requirements under high-speed railway driving conditions. Through the SPI interface, the chip outputs acceleration data in the form of digital signals, and the signal flows to the digital-to-analog conversion circuit arranged on the PCBA to complete the conversion of digital signals to analog signals, which is used to meet the requirements of different host computer interfaces;

[0034] The power management module 12 is directly connected to the external power supply through the DC24V input interface on the PCBA, and the input voltage range is 14.4V to 33.6V, ensuring the safe operation of the system when the power supply of the railway train is unstable. The overvoltage protection and undervoltage protection circuits are designed in the power management module 12. When the input voltage is higher than 33.6V or lower than 14.4V, the protection circuit will automatically start and cut off the power supply to avoid damage to the circuit caused by excessively high or low input voltage. The power management module adopts a DC-DC step-down voltage regulator circuit to reduce the input voltage to the stable voltage required by each module, ensuring the continuous operation of the acceleration signal acquisition module 11 and the signal conditioning module 13 under uninterrupted power supply. The power management module also integrates a thermal protection circuit, which can monitor the temperature state of the circuit and automatically adjust the output power when the temperature exceeds 80°C to avoid circuit failure due to excessive temperature.

[0035] The signal conditioning module 13 includes a digital-to-analog conversion circuit, an amplifier circuit, and a low-pass filter circuit. The digital-to-analog conversion circuit is used to convert the digital signal output by the acceleration signal acquisition module 11 into an analog signal. The digital-to-analog conversion circuit supports 12-bit resolution accuracy and sets the signal offset to a center voltage of 5V. During the signal flow, the amplifier circuit adjusts the gain of the converted analog signal to ensure that the signal meets the input level range required by the host computer. The low-pass filter circuit adopts a third-order Butterworth filter with a cutoff frequency set to 30Hz. It can achieve an efficient attenuation of -70dB at 100Hz, effectively suppressing high-frequency noise interference.

[0036] The anti-interference housing 15 is made of aluminum alloy, and the surface is anodized with a thickness of 12μm to enhance the corrosion resistance and impact resistance of the housing, which meets the use requirements of the railway outdoor environment. The anti-interference housing 15 provides mechanical protection for each module in the PCBA, and reduces the influence of external electromagnetic interference through electromagnetic shielding, which complies with the EN50121-3-2:2016 electromagnetic compatibility standard; the anti-interference housing 15 adopts segmented grounding, which is isolated from the signal ground of the PCBA, and realizes electrical isolation through the grounding terminal, which effectively reduces the influence of external interference sources on the sensor signal;

[0037] The signal output interface 14 is located on one side of the PCBA, and transmits the analog signal after digital-to-analog conversion and filtering to the host computer through the DC5V+ output pad. The signal output interface 14 supports an output current of 5mA to adapt to the different input impedances of the host computer. The signal output interface is closely connected to the PCBA wiring, and the integrity and stability of the transmission signal are ensured through anti-interference, which is suitable for data transmission requirements during high-speed driving;

[0038] like Figure 3As shown, the signal acquisition and processing components in the present invention mainly include a sensor PCBA (circuit board PCBA), an anti-interference housing component and a tail gland for cable sealing. The circuit board PCBA is provided with a power supply interface, a signal output interface and a debugging interface. The power supply and signal output interfaces are connected to the cable by welding to ensure stable signal transmission.

[0039] The connector assembly 16 includes a connector housing, a male plug, a male pin and a sealed end gland, which provides a safe and stable physical connection between the sensor and the braking system. The heavy load enables the connector to withstand high-frequency plugging and unplugging and strong vibration conditions in railway applications, ensuring the stability of signal and power transmission.

[0040] The cable assembly 17 is used to connect the signal acquisition and processing components with the connector components, providing a reliable medium for the transmission of signals and power. The cable adopts a high shielding design, has anti-electromagnetic interference capability, and is adapted to the requirements of industrial environments. The cable outer diameter is 13mm and includes 2 3-core (0.5mm 2 ) wires are used to transmit DC24V power and 5V signals to ensure stable transmission of signals and power.

[0041] The output center voltage of this acceleration sensor is set to 5V with a tolerance of ±3%. Within the acceleration range, the sensor produces a voltage offset of ±1.23V with an acceleration change of ±1g, and the output voltage increases and decreases linearly under positive and negative acceleration changes. The output of the center voltage is processed by high-precision digital-to-analog conversion and signal conditioning circuits to ensure that the output signal always changes stably around the 5V center voltage.

[0042] The sensor has an acceleration measurement range of ±2g and can effectively measure within the frequency range of 0-30Hz (-3dB) to meet the dynamic changes of railway bogies. To obtain a more stable low-frequency response, the frequency cutoff point can be adjusted to 25Hz (-3dB).

[0043] Frequency response refinement requirements include:

[0044] The measurement starts from 0Hz and records the lateral acceleration signal; frequency fluctuation: maintained within ±1dB in the range of 2-11Hz; cut-off frequency: designed to be -3dB at 30Hz (or adjustable to a minimum of 25Hz); attenuation characteristics: at least -70dB attenuation is achieved at 100Hz to suppress high-frequency noise interference and ensure signal purity;

[0045] The acceleration resolution of the sensor is designed to be 5mg, ensuring high-precision resolution under small acceleration changes;

[0046] In terms of error control, during the 20-year service life of the sensor, the comprehensive error including all environmental factors, temperature fluctuations, and rotation deviation is controlled within ±3%;

[0047] Y-axis rotation error: The rotation of the sensor around the y-axis does not affect the center voltage signal and the sensitivity of the sensor to ensure that the signal is not distorted;

[0048] X-axis rotation error: When the maximum deviation of the sensor around the x-axis is ±2°, the system error is controlled within ±3%;

[0049] The lateral sensitivity requirements of the sensor design are as follows: When the sensor is placed on a horizontal platform and 1g acceleration is applied in the X-axis or Z-axis direction, the output voltage must be maintained within the range of 5V±10%, between 4.5V and 5.5V; ensure that the acceleration response of the sensor in the non-target acceleration direction (X-axis or Z-axis) is effectively suppressed;

[0050] The sensor's signal update rate is set to a maximum of 10 milliseconds, which can ensure real-time output of acceleration data in a high-speed railway environment, ensuring the real-time nature of the data and effective reading by the host computer;

[0051] The sensor of the present invention can measure the acceleration change in a single direction (y-axis) based on the principle of uniaxial acceleration sensing. The output error of the sensor under the influence of acceleration in the X and Z directions is strictly controlled within the sensitivity range. The sensor is a single-channel sensor, which ensures the singleness and stability of the output data and is suitable for real-time monitoring of railway bogies.

[0052] The output signal range of the sensor is +2.5V to +7.5V, and through high-precision digital-to-analog conversion and amplification circuit processing, it can ensure the output accuracy of the maximum error of ±3%; the signal output current capacity is designed to be ≥5mA to meet the different load requirements of the host computer;

[0053] The power supply characteristics of this accelerometer meet the standard requirements of EN50155-2021, ensuring power adaptability, low power consumption and safety in the railway environment. The specific power input and protection measures are as follows:

[0054] Power input range: The power input of the sensor system is designed to be 14.4VDC to 33.6VDC, which can adapt to the working conditions of power fluctuations and meet the requirements of different train power systems;

[0055] Power supply nominal value: The power supply nominal voltage of this sensor is 24VDC, which is suitable for most railway power interfaces and provides a guarantee for the stable power supply of the sensor;

[0056] Power consumption control: When the sensor is running at a nominal voltage of 24VDC, the power consumption is controlled to be no more than 0.3W; the low power consumption design is achieved by optimizing the DC-DC conversion efficiency of the power management module 12, ensuring that the sensor is not prone to overheating during long-term operation, reducing energy consumption, and improving the operating efficiency of the system;

[0057] Protection measures: To ensure the safety of the sensor in the event of power anomalies, the human-machine interface unit (HMI) is designed with a variety of protection functions:

[0058] Polarity reverse protection measures: Through the diode reverse protection circuit, ensure that the internal circuit is not damaged when the sensor is connected to the reverse power polarity;

[0059] Short circuit protection: Short circuit protection is designed to automatically cut off the power supply when the output is short-circuited to prevent overcurrent from damaging components;

[0060] Overvoltage and undervoltage protection: When the power supply voltage exceeds 33.6V or is lower than 14.4V, the power management module 12 will automatically cut off the power supply to protect the system safety;

[0061] Overcurrent protection: When the sensor detects an overcurrent condition, the power management module will limit the current to protect the components and ensure long-term operation stability;

[0062] Working temperature: The sensor has an operating temperature range of -50°C to +85°C. It can start normally and operate stably at -50°C. At the same time, in a high temperature environment, the sensor can withstand a working environment of 100°C for a short time and remain normal for 10 minutes. This temperature range can cover most usage scenarios in the railway environment.

[0063] Storage temperature and humidity: Under storage conditions, the sensor can withstand a wider range of temperature and humidity. The storage temperature range is -55℃ to +100℃, and the relative humidity is not more than 95%. This design ensures that the sensor is not affected by extreme temperature and humidity during transportation and storage, ensuring product quality and performance.

[0064] The sensor is designed to meet a variety of complex environmental conditions to ensure its applicability in actual railway environments:

[0065] Altitude adaptability: The sensor can work normally at an altitude of less than 5,000 meters and adapt to the low-pressure environment in high-altitude areas. The power management module processes the current density and heat dissipation of the power input to adapt to the low air density and poor heat dissipation conditions in high-altitude areas.

[0066] Humidity requirements: The sensor can adapt to the operating conditions of high humidity environment. The average maximum relative humidity in the wettest month does not exceed 95%, and the average minimum temperature of the month is not less than 25°C. The anti-moisture and anti-corrosion shell ensures normal operation in high humidity environment.

[0067] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A lateral acceleration sensor for a bogie and a construction method thereof, the sensor comprising a circuit board PCBA (10), a speed signal acquisition module (11), a power management module (12), a signal conditioning module (13), a signal output interface (14), an anti-interference housing (15), a connector assembly (16) and a cable assembly (17), characterized in that: The sensor achieves accurate acquisition and output of lateral acceleration through the following architectural steps: The lateral acceleration data of the bogie is collected by a Murata SCA3300-D01 three-axis acceleration sensor chip in an acceleration signal acquisition module (11) installed on a circuit board PCBA (10), wherein the acceleration detection direction is the y-axis and the measurement range is ±2g, and the chip outputs an acceleration signal in a digital format through an SPI interface; The digital acceleration signal is converted into an analog voltage signal by using a digital-to-analog conversion circuit on a circuit board PCBA (10); the center voltage of the analog voltage signal is set to 5V, and a voltage offset of ±1.23V is generated with a ±1g acceleration change, so as to generate a voltage output signal corresponding to the lateral acceleration; the amplifier circuit and the low-pass filter circuit of the circuit board PCBA (10) adjust the analog voltage signal; the cutoff frequency of the filter circuit is 30Hz, and the signal is attenuated to -70dB at 100Hz, so as to suppress high-frequency interference and ensure the stability and clarity of the signal; The power management module (12) provides power to the sensor via a DC24V input power interface, and the power conversion circuit converts the input voltage into an operating voltage for the acceleration signal acquisition module (11) and the signal conditioning module (13), ensuring that the sensor operates stably within a voltage range of 14.4V to 33.6V and meets the power supply requirements of railway applications; The signal output interface (14) transmits the regulated analog voltage signal to the host computer end, and the signal output interface (14) supports DC5V+ output voltage and provides at least 5mA output current to ensure efficient reception and accurate reading of the signal at the host computer end; The anti-interference housing (15) is electrically isolated from the outside through a signal ground and adopts a grounding design that complies with the EN50121-3-2:2016 electromagnetic compatibility standard, and is used to suppress the influence of external electromagnetic interference on the sensor signal, ensuring that the sensor works normally in a complex electromagnetic environment; The material and sealing structure of the anti-interference housing (15) meet the IP68 protection grade and support a temperature range of -50°C to +85°C.

2. A bogie lateral acceleration sensor and its construction method according to claim 1, characterized in that: The sensor chip in the acceleration signal acquisition module (11) outputs lateral acceleration data via an SPI interface, has an applicable temperature range of -50°C to +100°C, and has an acceleration detection range of ±2g. The sensor chip is directly connected to a digital-to-analog conversion circuit in a signal conditioning module (13) via a preset interface, so as to realize continuous acquisition and transmission of acceleration signals.

3. A bogie lateral acceleration sensor and a construction method thereof according to claim 1, characterized in that: The power management module (12) is used to ensure that the sensor remains stable within the input voltage fluctuation range through overvoltage and undervoltage protection, and the overvoltage and undervoltage protection are used for operating voltages between 14.4V and 33.6V; The power management module (12) includes an overvoltage protection circuit and an undervoltage protection circuit. When the input voltage exceeds a set range, the protection circuit is activated and cuts off the power supply of the sensor to protect the safety of internal components. The power management module (12) is directly connected to the power supply interface of the sensor to provide power stability for signal acquisition and processing of the sensor.

4. A bogie lateral acceleration sensor and a construction method thereof according to claim 1, characterized in that: The low-pass filter circuit of the signal conditioning module (13) is a third-order Butterworth filter, the cut-off frequency of the filter is 30 Hz, the filter circuit comprises a group of resistor and capacitor networks, and is configured to achieve -70 dB attenuation at a frequency of 100 Hz, the input end of the filter circuit is connected to the digital-to-analog conversion circuit, and the output end is connected to the signal output interface (14) for controlling the frequency response range of the signal, and the third-order Butterworth filter is integrated into the signal conditioning module (13) through modularization, and is combined with the digital-to-analog conversion circuit and the amplification circuit.

5. A bogie lateral acceleration sensor and a construction method thereof according to claim 1, characterized in that: The signal output interface (14) comprises a DC5V+ output pad, the pad interface being capable of withstanding a maximum current output of 10mA. The DC5V+ output pad is directly connected to the signal conditioning module (13) as an analog output interface of the acceleration signal, and is used to adapt to different input interface impedance requirements of the host computer.

6. A bogie lateral acceleration sensor and a construction method thereof according to claim 1, characterized in that: The anti-interference housing (15) is made of aluminum alloy, and the surface of the anti-interference housing (15) is anodized, the thickness of the anodized layer is at least 12 μm, and the aluminum alloy material of the anti-interference housing (15) meets the requirements of corrosion resistance and impact resistance, and is used to provide mechanical protection and electromagnetic shielding.

7. A bogie lateral acceleration sensor and a construction method thereof according to claim 1, characterized in that: The protection level of the anti-interference housing (15) complies with the IP68 standard, is waterproof and dustproof, and can continuously work for at least 30 minutes at a water depth of 1 meter. The anti-interference housing (15) is tightly matched with the internal structure through a sealing ring, and a waterproof sealing ring is provided in the connector area of ​​the anti-interference housing (15).

8. A bogie lateral acceleration sensor and a construction method thereof according to claim 1, characterized in that: The anti-interference housing (15) is sealed with a sealant having a hardness of 40HA. The sealant is sealed on the surface of the internal components of the anti-interference housing (15) and is used to fix and protect the internal structure of the anti-interference housing (15).

9. A bogie lateral acceleration sensor and a construction method thereof according to claim 1, characterized in that: The acceleration calibration data of the sensor is stored by ASIC, and consistency detection is automatically performed every 1000 hours. The calibration data set in the ASIC includes acceleration range and offset calibration information. The sensor starts calibration consistency detection every 1000 hours.

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