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A self-locking output circuit and an automobile anti-theft circuit

A technology of output circuit and interlock circuit, which is applied in vehicle parts, transportation and packaging, anti-theft vehicle accessories, etc., can solve the problems of poor car safety and achieve the effect of increasing safety

Active Publication Date: 2015-08-26
BEIJING JINGWEI HIRAIN TECH CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention provides a self-locking output circuit and a car anti-theft circuit to overcome the problem of poor car safety caused by microcontroller failure in the prior art

Method used

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  • A self-locking output circuit and an automobile anti-theft circuit
  • A self-locking output circuit and an automobile anti-theft circuit
  • A self-locking output circuit and an automobile anti-theft circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Please refer to the attached figure 2 , provides a self-locking output circuit for the present invention, including a microcontroller 201 and a first switching tube 202, and also includes: an interlocking circuit 203. Wherein, the interlock circuit 203 includes a second switching transistor T2 and a third switching transistor T4.

[0038] The connection relationship of each device in the self-locking output circuit is as follows:

[0039] The control terminal of the second switching tube T2 is connected to the input terminal of the third switching tube T4 and the input terminal of the first switching tube 202 respectively, and the common connection terminal thereof serves as the output terminal of the self-locking output circuit. The output terminal of the second switching tube T2 is connected to the control terminal of the third switching tube T4, and the output terminal of the third switching tube T4 is connected to the output terminal of the first switching tube 20...

Embodiment 2

[0050] On the basis of the first embodiment, the second embodiment also adds a control circuit, such as Figure 4 As shown, the fourth switch tube T1 and the fifth switch tube T3 are included.

[0051] Wherein, the control terminal of the fourth switching tube T1 is connected to the second output terminal of the microcontroller 401, the control terminal of the fifth switching tube T3 is grounded through the fourth switching tube T1, and the fifth switching tube T3 is grounded through the fourth switching tube T1. The input terminal of the switch tube T3 is connected to the external power supply VBAT, and the output terminal of the fifth switch tube T3 is connected to the control terminal of the second switch tube T2.

[0052] Its working principle is:

[0053] When the contact switch of the relay is closed, the microcontroller outputs a closing signal to turn on the fourth switching tube T1, and at this time, the fifth switching tube T3 is then turned on. Since the turn-on v...

Embodiment 3

[0060] In addition, the present invention also provides an automobile anti-theft circuit, including a relay, an engine ignition device, and any one of the self-locking output circuits in the above-mentioned embodiments.

[0061] In summary: the present invention provides a self-locking output circuit, including a first switch tube and a microcontroller, and also includes: an interlock circuit, the interlock circuit includes a second switch tube T2 and a third switch tube T4 . When the microcontroller controls the first switch to be turned on, both the second switch and the third switch are turned on. At this time, assuming that the microcontroller breaks down, the first switch tube is turned off, but because the third switch tube is turned on, the output of the self-locking output circuit does not change, and the engine still ignites normally, which increases the safety of driving.

[0062] In addition, in order to resist interference and error signals, the first and second o...

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PUM

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Abstract

The invention provides a self-locking output circuit. The self-locking output circuit comprises a first switching pipe, a micro controller and an interlocking circuit, wherein the interlocking circuit comprises a second switching pipe and a third switching pipe. When the micro controller controls the first switching pipe to be conductive, the second switching pipe and the third switching pipe are conductive, and if the micro controller fails at present, the first switching pipe is switched off. Due to the fact that the third switching pipe is conductive, the output of the self-locking output circuit has no change, an engine ignites normally, and driving safety is increased.

Description

technical field [0001] The invention relates to the field of automobile electronics, and more specifically relates to a self-locking output circuit and an automobile anti-theft circuit. Background technique [0002] With the continuous progress of society, cars, as a means of transportation, have become an indispensable part of daily life. [0003] In the car anti-theft device, the commonly used anti-theft circuit such as figure 1 As shown, it includes a microcontroller 101 , a switch tube 102 , a relay 103 and an engine ignition device 104 . Wherein, the output end of the microcontroller 101 is connected with the control end of the switch tube 102, the switch tube 102 is connected in series with the coil of the relay 103, and the contact switch of the relay 103 is connected in series between the engine ignition device 104 and the power supply Vdd. [0004] When the automobile enters normally, the microcontroller 101 of the anti-theft device outputs a control signal, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R25/045
Inventor 贾春冬
Owner BEIJING JINGWEI HIRAIN TECH CO INC