METHOD OF INTEGRATED DETECTION FOR AUTOMOBILE INSTRUMENTS

• US 20090118893A1
• Filed: 11/05/2007
• Published: 05/07/2009
• Est. Priority Date: 11/05/2007
• Status: Abandoned Application

• Current Assignee: Xiuyu Che
• Original Assignee: Xiuyu Che
• Inventors: Che, Xiuyu
• Application Number:
  US11/934,877
• Publication Number:
  US 20090118893A1
• Time in Patent Office: Days
• US Class Current: 701/29
• CPC Class Codes: G01R 31/007 using microprocessors or computers

Abstract

This Invention Makes Known by a Method of Integrated Detection for automobile instruments. Its characteristic is that the program-controlled signal generator sends out the signal. Then the signal is sent to the automobile instruments which need to be detected after power amplifying and amplitude regulation. Resistance signal system is composed of resistance flashboard and resistance control board. And it also sends the signal to the automobile instruments which need to be detected. Then the signal of the automobile instrument is detected by output voltage detection system to determine whether the automobile instrument is qualified or not. The efficiency of the automobile instruments detection is improved enormously by the above method. The method eliminates the error and miss phenomena which are produced by human factors, so that the automobile instruments will have quality assurance.

Claims

1. A method of integrated detection for the automobile instruments comprising:

in a program-controlled signal generator, a single-chip microcomputer 16F873A could control a 8255-5 through analyzing and operating information of a keyboard;

the 8255 output BCD codes to control the BCD coefficient multiplier 4527 produce square signal;

get ideal square signal after 74LS90 dividing frequency and integrating;

the beforehand frequency and the output frequency are sent and displayed on LCD monitor in serial port by the single-chip microcomputer;

In a resistance signal system, a single-chip microcomputer detects the state of band switch and the state of resistance compensate switch, and sends the BCD codes to control one road of simulate switch CD7067 output 12V which could conduct IRF640;

resistances, which are on the flashboard, are sent to the automobile instrument through IRF640;

In the output voltage detection system, 741 can output high level that conduct transistor, then drive the buzzer to emit sound when the system detects voltage lower than the beforehand voltage.