Voltage type collision detection circuit

A collision detection, voltage-type technology, applied in the direction of circuits or fluid pipelines, tractors, vehicle components, etc., can solve the problems of filtering effect, no collision signal detected, low driving ability, etc., to avoid system power consumption or Effects of device damage, reduced failure probability, and improved drive capability
CN110758309AActive Publication Date: 2020-02-07ZHEJIANG GEELY HLDG GRP CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG GEELY HLDG GRP CO LTD
Publication Date
2020-02-07

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Abstract

The invention discloses a voltage type collision detection circuit. The circuit comprises a collision signal generator, a collision signal processing circuit and a microprocessor which are connected in sequence. The collision signal processing circuit comprises a switching circuit, a voltage division circuit and a comparison circuit which are connected in sequence, the switching circuit comprisesa first resistor and a transistor, one end of the first resistor is coupled with the collision signal generator, the other end of the first resistor is coupled with a grid electrode of the transistor,the voltage division circuit comprises a second resistor and a third resistor, one end of the second resistor is coupled with a positive electrode of a first power source, and the other end of the second resistor is coupled with one end of the third resistor and a drain electrode of the transistor. The comparison circuit comprises a comparator. The normal phase end of the comparator is coupled with the other end of the second resistor, the output end of the comparator is coupled with the microprocessor, and a positive electrode of the comparator is coupled with a positive electrode of a second power source. By means of the voltage type collision detection circuit, effective turn-off of the transistor can be ensured, and potential system power losses or device damage can be avoided.
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Description

technical field

[0001] The invention relates to the field of automobile safety, in particular to a voltage type collision detection circuit. Background technique

[0002] At present, automobile traffic presents a trend of high-speed vehicles, non-professional drivers and dense traffic flow, which in turn causes frequent traffic accidents of vehicle-vehicle collisions and human-vehicle collisions, which makes the research on automobile collision detection circuits have very important practical significance.

[0003] ACU (Airbag Control Unit, airbag control unit) is an electronic control module, which is an important part of the vehicle occupant auxiliary protection system, and is installed in the front-end area of ​​the central channel of the front floor of the vehicle. When the car collides, the ACU can send a collision signal to the car controller to realize the collision unlocking, fuel cut-off or high-voltage circuit cut-off. Wherein, the voltage-type collision signal is...

Claims

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