CN210741371U

CN210741371U - Hall current type position sensor and vehicle

Info

Publication number: CN210741371U
Application number: CN201921132785.2U
Authority: CN
Inventors: 王冬; 杨玉刚; 刘杰
Original assignee: Shanghai Aiyinsi Electronic Technology Co ltd
Current assignee: Shanghai Aiyinsi Electronic Technology Co ltd
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-06-12
Anticipated expiration: 2029-07-18

Abstract

The utility model provides a hall current type position sensor and vehicle, include: a Hall circuit and a magnet; the Hall circuit comprises a Hall chip, the magnet is arranged on an object to be detected, and electromagnetic induction output current is generated between the Hall chip and the magnet; the object to be measured comprises at least two different position states, and the current values of the object to be measured are different under the different position states. The utility model discloses a hall circuit and magnet are close to whether produce electromagnetic induction to obtain the output current of equidimension not, realized surveying the problem of the different positions of object, it is reliable to respond to than traditional mechanical structure, and the life-span is longer.

Description

Hall current type position sensor and vehicle

Technical Field

The utility model relates to an electronic circuit field specifically, relates to a hall current type position sensor and vehicle.

Background

In the automotive field, position sensors are typically of mechanical construction. For example, patent publication No. CN107923763A discloses a position sensor capable of improving the mountability of a magnet to a movable body such as a shaft in the axial direction. In order to achieve the object, a position sensor according to the present invention includes a target mounted on a movable body that moves in an axial direction, the target including a magnet and a magnet base that holds the magnet, and a magnet holding portion of the magnet base and a fixing portion to the movable body being integrally formed.

The traditional mechanical switch has low durability and reliability and cannot meet the market demand.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims at providing a hall current type position sensor and vehicle.

According to the utility model provides a pair of hall current type position sensor, include: a Hall circuit and a magnet;

the Hall circuit comprises a Hall chip, the magnet is arranged on an object to be detected, and a current value output by electromagnetic induction is generated between the Hall chip and the magnet;

the object to be detected comprises at least two different position states, and the current values of the object to be detected are different under the different position states;

the Hall chip comprises an output end, a grounding end, a power supply end, a triode and a pull-up resistor; the base electrode of the triode is coupled with the output end, the collector electrode of the triode is coupled with the grounding end, one end of the pull-up resistor is coupled and connected to the power supply end, and the other end of the pull-up resistor is coupled and output with the emitter electrode of the triode.

Preferably, the hall circuit further includes: the circuit comprises a diode, a first capacitor and a second capacitor;

the diode and the first capacitor are arranged at one end of the Hall circuit in parallel, and the second capacitor and the Hall chip are arranged at the other end of the Hall circuit in parallel.

Preferably, the different position states include: the distance between the object to be measured and the Hall circuit is different, or the object to be measured and the Hall circuit are shielded or not.

Preferably, the magnet comprises a magnet.

According to the invention, the vehicle comprises the Hall current type position sensor.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses a hall circuit and magnet are close to whether produce electromagnetic induction to obtain the output current of equidimension not, realized surveying the problem of the different positions of object, it is reliable to respond to than traditional mechanical structure, and the life-span is longer.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a circuit diagram of the hall circuit of the present invention;

FIG. 2 is a schematic structural view of the present invention;

fig. 3 is a circuit diagram of the hall chip.

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.

The utility model provides a pair of hall current type position sensor, include: a Hall circuit and a magnet;

as shown in fig. 1, the hall circuit includes a hall chip, a diode, a first capacitor and a second capacitor, the diode and the first capacitor are arranged at one end of the hall circuit in parallel, and the second capacitor and the hall chip are arranged at the other end of the hall circuit in parallel. The magnet is arranged on an object to be detected (not shown in the figure), and electromagnetic induction output current is generated between the Hall chip and the magnet.

As shown in fig. 3, the hall chip includes an output terminal, a ground terminal, a power terminal, a triode, and a pull-up resistor; the base electrode of the triode is coupled with the output end, the collector electrode of the triode is coupled with the grounding end, one end of the pull-up resistor is coupled and connected to the power supply end, and the other end of the pull-up resistor is coupled and output with the emitter electrode of the triode.

A triode 5 and a pull-up resistor 6 are added at the output end 2 of the Hall chip 1, wherein the base of the triode 5 is coupled with the output end 2, the collector of the triode 5 is coupled with the grounding end 3, one end of the pull-up resistor 6 is coupled with the power supply end 4, and the other end of the pull-up resistor 6 is coupled with the emitter of the triode 5 for output.

The hall chip 1 of the present example is a sensor that converts the measured magnetic field strength into a voltage output based on the hall effect principle using a hall element made of a semiconductor material. The device has the advantages of simple structure, small volume, firmness, wide frequency response, large action range, no contact, long service life, high reliability, easy miniaturization and integration and the like.

The triode 5 of this example is a PNP triode with current amplification, the output capability of the circuit is improved by coupling the base and collector of the PNP triode between the output terminal 2 and the ground terminal 3 of the hall chip 1, and the output of the PNP triode is stabilized by coupling the pull-up resistor 6 between the power supply terminal 4 of the hall chip 1 and the emitter of the PNP triode.

When the hall chip 1 outputs a high level, the emitter voltage Ue of the PNP transistor becomes the base level voltage Ub, and the PNP transistor is turned off. The output end 2 outputs high level through the power end 4 and the pull-up resistor 6, and the circuit outputs current through the power end at the moment, so that the output current is large and the output is stable. When the Hall chip 1 outputs a low level, the emitter voltage Ue of the PNP triode is greater than the base level voltage Ub, and the PNP triode is conducted at the moment. The output end 2 is connected with the ground through a collector of the PNP triode and outputs low level. Therefore, the output capability and the anti-interference capability of the Hall chip 1 can be greatly improved under the condition of ensuring that the output of the Hall chip is not changed by adding the PNP triode.

The working principle of the utility model is as follows:

the object to be measured comprises at least two different position states, and the current values of the object to be measured are different under the different position states. The different location states may be: the distance between the object to be measured and the Hall circuit is different, or the object to be measured and the Hall circuit are shielded or not. Thereby realizing the output of induced current with different magnitudes. The magnet can adopt a magnet, and the utility model discloses do not do the restriction to this.

As shown in fig. 2, when the magnet is pressed down from the position 1 to the position 2, the distance between the magnet and the hall chip is reduced, and the induced current generated by the hall chip is increased; when the magnet rises from the position 1 to the position 2, the distance between the magnet and the hall chip increases, and the induced current generated by the hall chip decreases.

The utility model discloses can be applied to the position sensor of vehicle.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. A hall current mode position sensor, comprising: a Hall circuit and a magnet;

the Hall circuit comprises a Hall chip, the magnet is arranged on an object to be detected, and electromagnetic induction output current is generated between the Hall chip and the magnet;

the object to be detected comprises at least two different position states, and the current values of the current are different when the object to be detected is in the different position states;

the Hall chip comprises an output end, a grounding end, a power supply end, a triode and a pull-up resistor; the base electrode of the triode is coupled with the output end, the collector electrode of the triode is coupled with the grounding end, one end of the pull-up resistor is coupled and connected to the power supply end, and the other end of the pull-up resistor is coupled and output with the emitter electrode of the triode;

the hall circuit further includes: the circuit comprises a diode, a first capacitor and a second capacitor;

2. The hall current mode position sensor of claim 1 wherein the different position states comprise: the distance between the object to be measured and the Hall circuit is different, or the object to be measured and the Hall circuit are shielded or not.

3. The hall current mode position sensor of claim 1 wherein the magnet comprises a magnet.

4. A vehicle characterized by comprising a hall current type position sensor according to any one of claims 1 to 3.