Circuit for achieving general switching value collection through AD channel

A switching value and channel technology, applied in the direction of logic circuit, general control system, logic circuit connection/interface layout, etc., can solve the problem that the conditioning circuit cannot realize high and low level universal acquisition, does not have fault judgment function, and is inconvenient to operate and other issues to achieve the effect of saving cost, reducing complexity and enhancing reliability

Inactive Publication Date: 2015-01-07
CHINA NORTH VEHICLE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing single-chip microcomputer hardware circuit generally collects switching signals through the I/O channel. In order to adapt to the voltage signal that the single-chip microcomputer I/O port can receive, different voltage conditioning circuits are required to collect high and l...

Method used

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  • Circuit for achieving general switching value collection through AD channel
  • Circuit for achieving general switching value collection through AD channel
  • Circuit for achieving general switching value collection through AD channel

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Embodiment Construction

[0027] In order to better understand the present invention, the content of the present invention will be further described below in conjunction with the accompanying drawings and examples.

[0028] The switching quantity universal acquisition circuit diagram provided by the present invention is as follows: figure 1 Shown:

[0029] Clamping diodes D1 and D2 have a voltage clamping function, and their model is BAT54S, with a conduction voltage drop of 0.3V;

[0030] The resistance value of the resistor R450 is 100KΩ, the resistance value of the resistor R453 is 100KΩ, the resistance value of the resistor R522 is 10KΩ, the resistance value of the resistor R562 is 33KΩ, and the rated power is 0.5W; the anode of the clamp diode D1 is grounded, and the clamp diode D2 The cathode is connected to +5V power supply.

[0031] Through the acquisition circuit, the voltage value of the sampling point of the voltage input of the switch quantity of the vehicle can be kept within the (-0.3-5...

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Abstract

The invention provides a circuit for achieving general switching value collection through an AD channel. The circuit comprises clamping diodes, resistors and a capacitor. The clamping diodes comprise the clamping diode D1 and the clamping diode D2. The resistors comprise the resistor R450, the resistor R453, the resistor R522 and the resistor R562. The capacitor is the capacitor C233. The resistor R450 and the capacitor C233 are connected in parallel and then are connected with the clamping diode D1 in parallel. The resistor R453 and the clamping diode D2 are connected in parallel. The negative pole of the clamping diode D1 is connected with the positive pole of the clamping diode D2, one end of the resistor R562 and one end of the resistor R522. The circuit can achieve general collection of vehicle switching value signals and open circuit fault judgment.

Description

Technical field: [0001] The invention relates to a circuit, in particular to a circuit for realizing universal collection of vehicle switch values ​​by using an AD channel. Background technique: [0002] The objective reality of the gradual improvement of vehicle informatization and digitization reflects the continuous increase of various electronic control units in the electrical system. The acquisition of various forms of signals inside the vehicle becomes the basis for the control unit to realize the automatic control of the vehicle. These signals include analog signals such as voltage, current, resistance, and pulse, as well as switching signals represented by high and low levels. [0003] The existing single-chip microcomputer hardware circuit generally collects switching signals through the I / O channel. In order to adapt to the voltage signal that the single-chip microcomputer I / O port can receive, different voltage conditioning circuits are required to collect high a...

Claims

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Application Information

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IPC IPC(8): H03K19/00H03K19/0175G05B19/042
Inventor 倪永亮王美靖李艳明张玉海刘新权王道灿乔凤普蒋任君李怡麒吴婷婷
Owner CHINA NORTH VEHICLE RES INST
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