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Diagnostic automobile combined instrument, instrument diagnostor and instrument diagnosing method

A combination instrument and automobile instrument technology, applied in the direction of instrument, vehicle test, machine/structural component test, etc., to achieve the effect of shortening maintenance time, reducing maintenance cost, and reducing labor load

Inactive Publication Date: 2011-01-19
QINGDAO DONGTIAN INTELLIGENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The diagnostic vehicle combination instrument, instrument diagnostic device and instrument diagnosis method described in the present invention aim at solving the above-mentioned problems and propose a device and method for diagnosing the existing non-high-end vehicle combination instrument

Method used

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  • Diagnostic automobile combined instrument, instrument diagnostor and instrument diagnosing method
  • Diagnostic automobile combined instrument, instrument diagnostor and instrument diagnosing method
  • Diagnostic automobile combined instrument, instrument diagnostor and instrument diagnosing method

Examples

Experimental program
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Embodiment 1

[0058] Example 1, such as figure 2 As shown, the diagnostic vehicle combination instrument described in this embodiment mainly includes: an instrument single-chip microcomputer, with a signal input port connected to the instrument interface circuit, a display output port, and a drive output port

[0059] and memory;

[0060] The instrument interface circuit has a digital signal sensor interface circuit, an analog signal sensor interface circuit and a switch signal interface circuit;

[0061] The instrument output circuit has a motor drive circuit, a liquid crystal drive circuit connected to a mileage liquid crystal display, and a switch circuit connected to an alarm indicator group.

[0062] A serial communication channel is set in the instrument interface circuit,

[0063] The instrument microcontroller is provided with serial data ports SDA1, SDL1 and control ports SDC1, ACT1,

[0064] A two-way four-channel analog switch COMS chip, respectively connected to a pair of di...

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PUM

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Abstract

The invention discloses a diagnostic automobile combined instrument, an instrument diagnostor and an instrument diagnosing method. The existing automobile combined instrument is improved, is provided with a serial communication interface with a diagnostic function and is matched with the automobile instrument diagnostor for use, thus realizing accurate diagnosis on specific faulted instruments, fault reasons and quantized sampling value errors, and providing direct basis for accurately judging the faulted parts, thereby shortening the maintenance time and effectively lowering the overhaul cost. The diagnostic automobile combined instrument comprises an instrument singlechip, an instrument interface circuit and an instrument output circuit, a serial communication channel is arranged in the instrument interface circuit, serial data ports SDA1 and SDL1 as well as control ports SDC1 and ACT1 are arranged in the instrument singlechip, and a bidirectional four-way analogue switch COMS chip is respectively connected with a control communication channel and a pair of digital pulse input circuits in a digital signal sensor interface circuit.

Description

technical field [0001] The invention relates to a diagnostic automobile combination instrument, an instrument diagnostic device and an instrument diagnosis method for automobile fault diagnosis and fault determination, and belongs to the field of machinery manufacturing. Background technique [0002] With the improvement of living standard and consumption ability, domestic automobile sales and usage have increased significantly, and the automobile maintenance and repair market is becoming more and more competitive. [0003] At present, the market saturation of high-end cars is not high, and most cars are still mid-range or popular for families. Now high-end cars already have an electronic diagnostic system with a CAN communication bus interface, and the corresponding car combination instrument also has this kind of diagnostic function. The sockets and wiring harness plugs of these car meters also have CAN communication. [0004] Communication bus interface jack, pin. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D7/02G01M17/007G01D18/00
Inventor 马勇男车秀玉吕清宝
Owner QINGDAO DONGTIAN INTELLIGENT TECH CO LTD
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