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An alarm circuit for detecting the state of the door switch

A technology for alarm circuits and door switches, applied in circuits or fluid pipelines, vehicle components, signal devices, etc., can solve the problems of high design cost and high risk of circuit function failure, achieving low cost, low function failure risk, and saving IO The effect of oral resources

Active Publication Date: 2020-02-18
HUIZHOU DESAY SV AUTOMOTIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, the IO port resources and memory resources of the automotive instrument MCU are excessively occupied. When the IO port resources are not enough, MCU chips with more IO port resources will be selected, the design cost is higher, and the risk of functional failure of the circuit is relatively high. high

Method used

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  • An alarm circuit for detecting the state of the door switch

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Embodiment Construction

[0015] The implementation of the present invention will be explained in detail below in conjunction with the accompanying drawings. The examples are given for illustrative purposes only, and should not be understood as limiting the present invention, including the selection and value of the components and the accompanying drawings. Examples are for reference and illustration only, and do not constitute a limitation to the patent protection scope of the present invention, because many changes can be made to the present invention without departing from the spirit and scope of the present invention.

[0016] see figure 1 , is a connection diagram of an alarm circuit for detecting the door switch state provided by the embodiment of the present invention. In this embodiment, the described alarm circuit for detecting the switch state of the car door includes the door state output terminals (corresponding to the following, referring to the door state output terminals Door 1 to Door N...

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Abstract

The invention relates to the technical field of vehicle door detection and particularly relates to an alarm circuit for detecting opening and closing states of a vehicle door. The alarm circuit comprises a state signal input sub circuit and an alarm sub circuit connected between a vehicle door state output end and a hardwire connecting end of a motormeter and also comprises a detection sub circuitconnected between a vehicle door state output end and a vehicle door state detection end of a MCU of the motormeter. The vehicle door state output end outputs a state signal of the vehicle door and the hardwire connecting end outputs a hardwire voltage. The alarm circuit provided by the invention has the beneficial effects that the set alarm sub circuit is directly driven by the hardwire of the motormeter, IO port drive of the MCU of the motormeter in the prior art is replaced, the IO port resource of the MCU of the motormeter is saved, all vehicle doors share one alarm sub circuit and do notinterfere one another, and the function disabling risk of the circuit is relatively low; the detection sub circuits of the vehicle doors are detected by means of resistive subdivision and are independent and do not interfere one another, so that the function disabling risk of the circuit is relatively low.

Description

technical field [0001] The invention relates to the technical field of vehicle door detection, in particular to an alarm circuit for detecting the state of a vehicle door switch. Background technique [0002] At present, most of the combined car instruments design a detection circuit and an alarm circuit for each door, which are used to detect the opening and closing status of the door and send corresponding alarm information. Under the situation that there are many car doors, the detection circuit and the alarm circuit increase accordingly. Wherein, if the alarm indicator light is used to indicate the alarm information, each alarm indicator light uses the MCU (Micro Control Unit) in the automobile instrument (in this application, One IO port of the automobile instrument MCU for short) is driven independently, and a detection circuit will also occupy one IO port. In general, the IO port resources and memory resources of the automotive instrument MCU are excessively occupied...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60Q9/00B60R16/023
CPCB60Q9/00B60R16/0231
Inventor 叶才学钟声杨全义
Owner HUIZHOU DESAY SV AUTOMOTIVE
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