阅读说明：本技术 制动灯传感器 (Brake lamp sensor ) 是由 唐竞 林长波 陈江深 黄东杰 张德军 龙文 钟永普 陈锐 李伟伟 陈裴 杨继业 于 2019-09-18 设计创作，主要内容包括：本发明公开了一种制动灯传感器,涉及汽车制造技术领域。包括电源处理电路,所述电源处理电路有两个,一个是第一电源处理电路,另一个是第二电源处理电路,所述第一电源处理电路为第一霍尔元件提供工作电源,所述第二电源处理电路的为第二霍尔元件提供工作电源,所述第一霍尔元件的输出端通过第一开关管输出信号,所述第二霍尔元件的输出端通过第二开关管输出信号；所述第一开关管从所述第一电源处理电路获取电源,所述第二开关管从所述第二电源处理电路获取电源。本发明可以解决现有技术一路电源掉电,两路信号BLS和BTS都丢失,影响行车安全性的问题。(The invention discloses a brake lamp sensor, and relates to the technical field of automobile manufacturing. The power supply comprises two power supply processing circuits, wherein one power supply processing circuit is a first power supply processing circuit, the other power supply processing circuit is a second power supply processing circuit, the first power supply processing circuit provides a working power supply for a first Hall element, the second power supply processing circuit provides a working power supply for a second Hall element, the output end of the first Hall element outputs a signal through a first switch tube, and the output end of the second Hall element outputs a signal through a second switch tube; the first switch tube obtains power from the first power supply processing circuit, and the second switch tube obtains power from the second power supply processing circuit. The invention can solve the problem that in the prior art, when one power supply is powered off, two signals BLS and BTS are lost, which affects the driving safety.)

1. A stop lamp sensor comprising a power processing circuit, characterized in that: the power supply processing circuit comprises two power supply processing circuits, wherein one power supply processing circuit is a first power supply processing circuit, the other power supply processing circuit is a second power supply processing circuit, the first power supply processing circuit provides a working power supply for the first Hall element, the second power supply processing circuit provides a working power supply for the second Hall element, the output end of the first Hall element outputs a signal through the first switch tube, and the output end of the second Hall element outputs a signal through the second switch tube; the first switch tube obtains power from the first power supply processing circuit, and the second switch tube obtains power from the second power supply processing circuit.

2. The stop lamp sensor according to claim 1, wherein: the first switch tube is any one of a field effect tube or a triode.

3. The stop lamp sensor according to claim 1 or 2, wherein: the second switch tube is any one of a field effect tube or a triode.

4. The stop lamp sensor according to claim 1 or 2, wherein: and the output end of the second switching tube outputs signals through an output resistor.

5. The stop lamp sensor according to claim 4, wherein: the output resistor is formed by connecting three resistors with the same resistance in parallel.

6. The stop lamp sensor according to claim 3, wherein: and the output end of the second switching tube outputs signals through an output resistor.

Technical Field

The invention relates to the technical field of automobile manufacturing, in particular to a brake lamp sensor with two independent redundant power supplies for power supply.

Background

The brake lamp sensor comprises a sensor based on Hall effect, the driving structure is a permanent magnet arranged on a brake main cylinder, and the magnet moves synchronously with a brake main cylinder piston. The working mechanism of the sensor is based on changing the distance of the permanent magnet relative to the hall element in the sensor to cause the hall voltage to change. When the brake is applied, the piston moves to move the magnet past the brake light sensor, and a magnetic flux is reached where signal switching can occur. When the brake pedal is released, the permanent magnet returns to its original position.

The stop lamp sensor is a sensor for converting displacement change into high and low level electric signals to be output. Two Hall elements are designed on the sensor, and the two Hall elements output two brake lamp signals BLS and BTS (BLS is defined as brake lamp signal 1, and BTS is brake lamp signal 2). The two Hall elements of the general brake lamp sensor share one power supply processing circuit.

The stop lamp sensor shares one power supply processing circuit, and after an ECU (engine control unit) is in dormancy, the compartment lamp power supply is still not disconnected, and current still passes through the ECU to influence the function of the ECU; the structure has the problems that one path of power supply is powered off, and two paths of signals BLS and BTS are lost, so that the driving safety is influenced.

Disclosure of Invention

The invention aims to provide a brake lamp sensor which can solve the problem that in the prior art, when one power supply is powered off, two signals BLS and BTS are lost, and the driving safety is influenced.

In order to solve the problems, the invention adopts the technical scheme that: the brake lamp sensor comprises a power supply processing circuit, and is characterized in that: the power supply processing circuit comprises two power supply processing circuits, wherein one power supply processing circuit is a first power supply processing circuit, the other power supply processing circuit is a second power supply processing circuit, the first power supply processing circuit provides a working power supply for the first Hall element, the second power supply processing circuit provides a working power supply for the second Hall element, the output end of the first Hall element outputs a signal through the first switch tube, and the output end of the second Hall element outputs a signal through the second switch tube; the first switch tube obtains power from the first power supply processing circuit, and the second switch tube obtains power from the second power supply processing circuit.

In the above technical solution, a more specific solution may also be: the first switch tube is any one of a field effect tube or a triode.

Further: the second switch tube is any one of a field effect tube or a triode.

Further: and the output end of the second switching tube outputs signals through an output resistor.

Further: the output resistor is formed by connecting three resistors with the same resistance in parallel.

Due to the adoption of the technical scheme, compared with the prior art, the invention has the beneficial effects that: because the invention is provided with two paths of power supplies for independent power supply, two paths of Hall elements of the brake lamp sensor can independently take power, and two paths of brake signals output by the brake lamp sensor can be independently controlled; two paths of Hall elements of the sensor are respectively supplied with power by two paths of power supplies, when one path of power supply fails, the other path of power supply can still supply power to the Hall elements, the output of braking signals is kept, and the braking signals are prevented from being lost completely.

Drawings

Fig. 1 is a block schematic of the present invention.

Detailed Description

The invention is described in more detail below with reference to the following figures and examples:

the stop lamp sensor shown in fig. 1 includes two power supply processing circuits, one is a first power supply processing circuit 1, the other is a second power supply processing circuit 2, the first power supply processing circuit 1 provides working power supply for the first hall element 3, the second power supply processing circuit 2 provides working power supply for the second hall element 4, the output end of the first hall element 3 outputs a signal through a first switch tube T1, and the output end of the second hall element 4 outputs a signal through a second switch tube T2; the first switch tube T1 obtains power from the first power processing circuit 1, and the second switch tube T2 obtains power from the second power processing circuit 2. The output end of the second switch tube outputs signals through an output resistor R, and the output resistor R is formed by connecting three resistors with the same resistance in parallel. In this embodiment, the first switch transistor T1 is a field effect transistor; the second switch transistor T2 is a triode.

The brake lamp sensor adopts two paths of power supplies for power supply, two paths of Hall elements get independent power, and two paths of brake signals output by the brake lamp sensor can be independently controlled;

the two Hall elements of the sensor are respectively supplied with power by two power supplies, when one power supply fails, the other power supply can still supply power to the Hall elements, the output of braking signals is kept, the braking signals are prevented from being completely lost, and the ECU can be used in a degraded mode.

The invention can also only keep one path of power-on and the other path of power-off according to the requirement, and only keep one path of signal output according to the requirement.

In other embodiments, the first switch transistor T1 is a triode and the second switch transistor T2 is a field effect transistor.