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Simulation system of AK protocol wheel speed sensor and simulation method thereof

A technology of wheel speed sensor and simulation system, applied in general control system, control/regulation system, instrument, etc., can solve the problem that there is no way to solve the simulation method of intelligent wheel speed sensor, and achieve the effect of improving coverage

Pending Publication Date: 2021-07-09
FAW CAR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For patent document 1 to solve the problem of testing the performance of the wheel speed sensor before leaving the factory, patent document 2 only outputs the simplest frequency current of the wheel speed sensor through hardware circuit design, and there is no way to solve the simulation of the intelligent wheel speed sensor with data protocol method, patent document 3 is the circuit design of the wheel speed sensor board, not a specific test system solution

Method used

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  • Simulation system of AK protocol wheel speed sensor and simulation method thereof
  • Simulation system of AK protocol wheel speed sensor and simulation method thereof
  • Simulation system of AK protocol wheel speed sensor and simulation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 As shown, a simulation system of an AK protocol wheel speed sensor includes an AK protocol wheel speed sensor simulation model, an upper and a lower computer interface control module, an FPGA board and a vehicle model; the vehicle model is used to output four wheels wheel speed signal; the AK protocol wheel speed sensor simulation model is used to receive the wheel speed signal, and configure the parameters of four wheel speed sensors in the AK protocol wheel speed sensor simulation model, and configure the AK protocol data bit0-bit8 ,Such as figure 2As shown, and output all parameters of the AK protocol to the FPGA board, the parameters of the four wheel speed sensors include simulation enablement, calculation of wheel speed sensor current signal frequency, configuration minimum frequency, stop frequency, signal maximum current, Intermediate current, minimum current, number of teeth, number of missing teeth, data pulse width, stop pulse width, speed ...

Embodiment 2

[0033] A kind of emulation method of AK protocol wheel speed sensor, concrete steps are as follows:

[0034] (1) Vehicle model: use Dyna4 simulation software to call four wheel cylinder brake pressure signals in the vehicle model braking system (left front wheel cylinder pressure P_FL, right front wheel cylinder pressure P_FR, left rear wheel cylinder pressure Cylinder pressure P_RL, right rear wheel cylinder pressure P_RR) as input signals and four wheel speed signals (left front wheel speed signal WS_FL, right front wheel speed signal WS_FR, left rear wheel speed signal WS_RL, right rear wheel speed signal WS_RR) as an output signal;

[0035] (2) AK protocol wheel speed sensor simulation model: use the four wheel speed signals output by the above vehicle model as the input of the AK protocol wheel speed sensor simulation model, and judge whether the wheel status is stalled, forward or Reverse, configure the parameters of the four wheel speed sensors in this model: wheel spe...

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Abstract

The invention discloses a simulation system of an AK protocol wheel speed sensor and a simulation method thereof, which belong to the technical field of automobile electronic and electrical simulation testing. The simulation system comprises an AK protocol wheel speed sensor simulation model, an upper and lower computer interface control module, an FPGA board card and a whole automobile model. The whole automobile model is used for outputting wheel speed signals of four wheels; the AK protocol wheel speed sensor simulation model is used for receiving a wheel speed signal, configuring various parameters of four wheel speed sensors in the AK protocol wheel speed sensor simulation model, configuring AK protocol data bit0-bit8, and outputting all the parameters of the AK protocol to the FPGA board card; and the FPGA board card is used for outputting the frequency current signal of the AK protocol to the electronic stability control unit. According to the simulation system, complete analysis and accurate real-time simulation of the AK protocol wheel speed sensor can be achieved, simulation and testing of conditions such as stalling, forward rotation, reverse rotation, speed pulse width errors, protocol errors, verification errors and air gap size real-time changes are further achieved, and the test range coverage is improved.

Description

technical field [0001] The invention belongs to the technical field of automotive electronic and electrical simulation testing, and in particular relates to a simulation system and a simulation method of an AK protocol wheel speed sensor. Background technique [0002] With the increasing functions of automotive electronic control systems and the increasingly complex control strategies, the requirements for components are also increasing. At present, more and more passenger cars begin to adopt intelligent wheel speed sensors with data protocol and verification functions, such as wheel speed sensors with AK communication protocol. The wheel speed sensor of the AK protocol has the following advantages: 1. It has three states of forward rotation, reverse rotation and stop rotation; 2. It can identify the installation air gap size; 3. It has the function of data parity check. However, it is difficult to integrate the wheel speed sensor and related components of the AK protocol o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B17/02
CPCG05B17/02
Inventor 王晰聪谷原野孙运玺刘德利王升鑫白爽孙云马文峰
Owner FAW CAR CO LTD
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