阅读说明：本技术 车速传感器检测系统 (Vehicle speed sensor detection system ) 是由 石坤举 于 2021-09-06 设计创作，主要内容包括：本发明公开了一种车速传感器检测系统,包括依次连接的传感器单元、滤波器、信号放大器、触发器、A/D转换器、单片机、信号处理单元,所述传感器单元用于采集预设位置的速度信号,所述信号放大器用于接收输入信号并进行放大,所述触发器用于触发整形,所述A/D转换器用于将触发整形后的信号变换成数字信号,所述信号处理单元包括信号存储模块和信号分析模块,所述信号存储模块用于存储数字信号,所述信号分析模块用于分析数字信号,并进行行车安全报警决策。本发明测试精度高、数据通信可靠、抗干扰能力强。(The invention discloses a vehicle speed sensor detection system which comprises a sensor unit, a filter, a signal amplifier, a trigger, an A/D converter, a single chip microcomputer and a signal processing unit, wherein the sensor unit, the filter, the signal amplifier, the trigger, the A/D converter, the single chip microcomputer and the signal processing unit are sequentially connected, the sensor unit is used for collecting speed signals at a preset position, the signal amplifier is used for receiving input signals and amplifying the input signals, the trigger is used for triggering and shaping, the A/D converter is used for converting the signals after triggering and shaping into digital signals, the signal processing unit comprises a signal storage module and a signal analysis module, the signal storage module is used for storing the digital signals, and the signal analysis module is used for analyzing the digital signals and making driving safety alarm decisions. The invention has high test precision, reliable data communication and strong anti-interference capability.)

1. A vehicle speed sensor detection system characterized in that: the device comprises a sensor unit, a filter, a signal amplifier, a trigger, an A/D converter, a single chip microcomputer and a signal processing unit which are sequentially connected, wherein the sensor unit is used for collecting speed signals of a preset position, the signal amplifier is used for receiving input signals and amplifying the input signals, the trigger is used for triggering and shaping, the A/D converter is used for converting signals after triggering and shaping into digital signals, the signal processing unit comprises a signal storage module and a signal analysis module, the signal storage module is used for storing the digital signals, and the signal analysis module is used for analyzing the digital signals and making driving safety alarm decisions.

2. The vehicle speed sensor detection system according to claim 1, characterized in that: the signal processing unit is further connected with a voice broadcasting module and a display module, and the voice broadcasting module broadcasts in real time.

3. The vehicle speed sensor detection system according to claim 2, characterized in that: the signal processing unit is further connected with a logic control unit, the logic control unit is connected with a motor, and the logic control unit is formed by logically combining a plurality of relays and used for starting and closing the motor.

Technical Field

The invention relates to a sensor detection system for an automobile, in particular to a vehicle speed sensor detection system.

Background

The automobile is generally provided with devices such as an engine control device, an automatic driving device, an ABS (anti-lock brake system), a TRC (vehicle control center), an automatic door locking device, an active suspension, a guide system and an electronic instrument, and the devices all need automobile speed signals, so that the accuracy and the stability of output signals of a speed sensor can greatly influence the control units.

The working principle is that when the rotating mechanism of the sensor rotates under the action of external drive, the permanent magnet is driven to rotate, the magnetic field penetrating through the Hall element generates periodic change to cause the output voltage of the Hall element to change, and a stable pulse voltage signal is formed through subsequent circuit processing and serves as the output signal of the vehicle speed sensor. However, the disadvantage is that there is noise signal interference in the signal input, which causes the detection system not to accurately acquire the measured signal.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a vehicle speed sensor detection system.

In order to achieve the purpose, the invention adopts the following technical scheme: a vehicle speed sensor detection system comprises a sensor unit, a filter, a signal amplifier, a trigger, an A/D converter, a single chip microcomputer and a signal processing unit which are sequentially connected, wherein the sensor unit is used for collecting speed signals of a preset position, the signal amplifier is used for receiving input signals and amplifying the input signals, the trigger is used for triggering and shaping, the A/D converter is used for converting signals after triggering and shaping into digital signals, the signal processing unit comprises a signal storage module and a signal analysis module, the signal storage module is used for storing the digital signals, and the signal analysis module is used for analyzing the digital signals and making driving safety alarm decisions.

The signal processing unit is further connected with a voice broadcasting module and a display module, and the voice broadcasting module broadcasts in real time.

The signal processing unit is further connected with a logic control unit, the logic control unit is connected with a motor, and the logic control unit is formed by logically combining a plurality of relays and used for starting and closing the motor.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that: the method has the advantages of high test precision, reliable data communication, strong anti-interference capability, simple and visual detection process and low system development cost.

Drawings

FIG. 1 is a block diagram of a vehicle speed sensor detection system according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the invention relates to a vehicle speed sensor detection system, which comprises a sensor unit 1, a filter 2, a signal amplifier 3, a trigger 4, an a/D converter 5, a single chip microcomputer 6 and a signal processing unit 7 which are connected in sequence, so as to realize high test precision and strong anti-interference capability.

Specifically, the sensor unit 1 includes a speed sensor for acquiring a speed signal of a preset position, and the filter 3 is used for filtering the wave to eliminate a noise signal. The signal amplifier 3 is used for receiving and amplifying an input signal, and the trigger 4 is used for triggering shaping. The a/D converter 4 is used to convert the trigger shaped signal into a digital signal.

In this embodiment, the speed sensor adopts a hall element, and has the characteristics of high stability, high precision, high reliability and strong environmental adaptability. The single chip microcomputer 6 preferably adopts an LPC2119 chip, the LPC2119 is based on a 32-bit ARM7TDMI-S CPU supporting real-time simulation and embedded tracking, and the single chip microcomputer is provided with a 128kB embedded high-speed Flash memory.

The signal processing unit 7 comprises a signal storage module 71 and a signal analysis module 72, the signal storage module 71 is used for storing digital signals, the signal analysis module 72 is used for analyzing the digital signals and making driving safety alarm decisions, the signal processing unit 7 is further connected with a voice broadcasting module 8 and a display module 9, and the voice broadcasting module 8 broadcasts in real time to prompt the speed of the automobile for a driver. The display module 9 is used for displaying the test structure.

The signal processing unit 7 is further connected with a logic control unit 10, the logic control unit 10 is connected with a motor 11, wherein the logic control unit 10 is formed by logically combining a plurality of relays and is used for starting and closing the motor 11. The motor 11 is used for driving the gear ring to rotate, and the gear ring periodically leaves and approaches the permanent magnet, so that the speed sensor generates a voltage signal.

The invention has the advantages of high test precision, reliable data communication, strong anti-interference capability, simple and visual detection process and low system development cost.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.