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A method for setting load current fault threshold

A technology of fault threshold and setting method, applied in electrical testing/monitoring, program loading/starting, instruments, etc., can solve problems such as setting threshold error, and achieve the effect of avoiding detection error, improving control accuracy, and improving diagnostic accuracy

Active Publication Date: 2020-08-04
DONGFENG COMML VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem of large setting threshold error existing in the prior art, and to provide a high-accuracy setting method of load current fault threshold

Method used

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  • A method for setting load current fault threshold
  • A method for setting load current fault threshold
  • A method for setting load current fault threshold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for setting a load current fault threshold, the method for setting the fault threshold comprises the following steps:

[0036] Step 1: Installation, connect the BCM1 with settings to the ValueCan3 through the CAN line, connect the USB line of the ValueCan3 to the industrial computer 2, and connect the load signal output terminal of the BCM1 to the corresponding analog load in the load box 4 through a hard line. Connect, at this time the flashing pre-installation of BCM1 is completed;

[0037] Step 2: flash into the calibration program, the industrial computer 2 uses ValueCan3 to flash into the power calibration program for BCM1 through the CAN line;

[0038] Step 3: Rated power calibration, acquisition, storage, industrial computer 2 uses ValueCan3 to send calibration instructions to BCM1 through the CAN line, until the CAN bus signal acquisition and processing module of BCM1 receives the calibration instruction, BCM1 load drive after BCM1 receives the calibrat...

Embodiment 2

[0042] Embodiment 2 is basically the same as Embodiment 1, and its difference is:

[0043] The rated power of the simulated load in the load box 4 is the same as the rated power of the corresponding equipment on the vehicle; in the third step, after the BCM1 receives the calibration instruction, the load drive output module of the BCM1 drives the load box 4 to output at the rated load, referring to BCM1 drives the output of each load interface in sequence, and each output is kept for 3 seconds. After the output is stable, read the feedback voltage value corresponding to the analog load and calculate the rated current, and store the rated current in the corresponding address space as Benchmark parameters for fault diagnosis.

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PUM

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Abstract

The invention discloses a method for setting a load current fault threshold. The method comprises the following steps: firstly, installation is performed: a BCM with a setting is connected with a ValueCan through a CAN line, a USB line of the ValueCan is connected with an industrial personal computer, and the load signal output end of the BCM is connected with a corresponding simulated load in a load box through a hard wire; secondly, a calibration program is flashed; thirdly, the rated power is calibrated, collected and stored; fourthly, an application program is flashed; and fifthly, the fault threshold is calculated after installation. According to the design, the BCM can detect a load current of the load, so that the control precision of the BCM is effectively improved, and the situation of fault misreporting is avoided; and the calculation parameter change is convenient, so that software is not required to be reissued for adaptation.

Description

technical field [0001] The invention relates to a method for setting a load current fault threshold, which is particularly suitable for brushing in the rated current of a load through equipment and simplifying the programming steps of the BCM. Background technique [0002] An important function of BCM (body control unit) is to complete the control and fault diagnosis of vehicle body electrical appliances, including vehicle interior / exterior lights, wiper motors, washing motors and solenoid valves, etc. BCM can realize real-time monitoring and diagnosis of the above electrical loads Whether the load is working normally, protect the load and broadcast the relevant fault codes to the instrument in case of failure. [0003] When BCM diagnoses the load, it mainly completes by judging the current working current of the load, that is, the power. In the prior art method, the load rated power and the power under the fault state are usually solidified in the controller in advance as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02G06F9/445
CPCG05B23/0213G06F9/445
Inventor 代鹏王高举颜江廖宗贤
Owner DONGFENG COMML VEHICLE CO LTD
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