Self-adaptive control method and device for eliminating drifting of sensor

A technology of self-adaptive control and self-adaptive algorithm, applied in the direction of transmission control, special recording/indicating device, measuring device, etc., can solve the problems of poor safety and fuel consumption, different zero-point drift values, and zero-point drift changes, etc. Achieve strong self-adaptive ability, eliminate zero-point drift, and achieve the effect of high safety

Active Publication Date: 2014-01-22
WUHU WANLIYANG TRANSMISSION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are three main factors affecting the zero drift of the sensor: First, because the pressure-sensitive material used in the sensor has different degrees of sensitivity to temperature, its performance will be affected by the temperature, so when the temperature changes, the zero drift of the sensor will also change; Second, the manufacturing error of the pressure-sensitive material used in the sensor will make its zero drift value have individual differences, that is, the zero drift value of the same batch of newly produced sensors is different at the same temperature; third, the sensor is in its service life. The characteristics of the pressure-sensitive material will also change, which will cause the zero drift value of the sensor to change
[0004] Therefore, affected by the zero drift value of the sensor, the output signal of the oil pressure sensor will be distorted and deviate from the real output value, thus affecting the control system to fail to achieve its best control effect, increasing the risk of system operation, and reducing the transmission of the automatic transmission. efficiency
Leads to poor safety and fuel consumption of cars equipped with automatic transmissions

Method used

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  • Self-adaptive control method and device for eliminating drifting of sensor
  • Self-adaptive control method and device for eliminating drifting of sensor
  • Self-adaptive control method and device for eliminating drifting of sensor

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Embodiment 1

[0030] as attached figure 1 Shown, a kind of adaptive control method for eliminating sensor drift of the present invention is as follows:

[0031] 101. When the automatic transmission control unit (TCU) software is running, it first reads the data table for the adaptive algorithm into the random access memory (RAM), so as to update the data table after the algorithm runs.

[0032] This data table is the object modified by the adaptive algorithm. It is used to record and describe the characteristic curve of the zero point drift of the oil pressure sensor under different operating temperature conditions. The initial value of the data table is 0. After the working time of the vehicle is extended, Its data is constantly improving.

[0033] 102. The single-chip A / D module of the automatic transmission control unit (TCU) collects signals required for adaptive control such as oil pressure sensor signals (signals required for adaptive control include ignition valid signal, engine spe...

Embodiment 2

[0050] as attached image 3 As shown, an adaptive control device for eliminating sensor drift of the present invention includes a system initialization module 201, which is used to automatically read out a one-dimensional table data representing the relationship between oil temperature and sensor zero drift value when powered on, and It is stored in random access memory;

[0051] A signal acquisition module 202, configured to acquire signals required for adaptive control;

[0052] A signal conversion module 203, configured to convert the collected signals required for adaptive control into engineering units;

[0053] The adaptive algorithm working module 204 is used to determine whether the current working condition meets the operating conditions of the adaptive algorithm according to the collected signals required for adaptive control, and perform corresponding calculations to obtain the sensor zero drift value under the current working condition.

[0054]The device also in...

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Abstract

A self-adaptive control method for eliminating sensor drift, involves: reading one-dimensional table data representing the relationship between an oil temperature and a sensor zero drift value with a self-adaptive control system of an automatic gearbox control unit; collecting signals for self-adaptive control with a single chip microcomputer analog / digital module of the automatic gearbox control unit; judging the running condition of a self-adaptive algorithm by a program. By inquiring the one-dimensional table data, the sensor zero drift value is generated by the self-adaptive algorithm.

Description

technical field [0001] The invention relates to the field of automatic transmission control, and in particular provides an adaptive control method and device for eliminating sensor drift. Background technique [0002] In automatic transmission control, the accuracy of the output signal of the oil pressure sensor plays a vital role in the stable and safe operation of the system control. In practical engineering applications, piezoresistive and capacitive pressure sensors are the most widely used. [0003] There are three main factors affecting the zero drift of the sensor: First, because the pressure sensitive material used in the sensor has different degrees of sensitivity to temperature, its performance will be affected by the temperature, so when the temperature changes, the zero drift of the sensor will also change; Second, the manufacturing error of the pressure-sensitive material used in the sensor will make its zero drift value have individual differences, that is, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H63/40
CPCF16H2059/683F16H59/68F16H2061/1284G01D3/0365
Inventor 巩翔宇
Owner WUHU WANLIYANG TRANSMISSION CO LTD
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