CN209485377U

CN209485377U - A kind of micro magnetic sensor circuit

Info

Publication number: CN209485377U
Application number: CN201920327919.XU
Authority: CN
Inventors: 徐守万; 何银芬
Original assignee: Quantity Sensing Technology Co Ltd
Current assignee: Quantity Sensing Technology Co Ltd
Priority date: 2019-03-15
Filing date: 2019-03-15
Publication date: 2019-10-11
Anticipated expiration: 2029-03-15

Abstract

The utility model discloses a kind of micro magnetic sensor circuits, including signal acquisition module, signal acquisition module is electrically connected with power positive line, power cathode line and signal output line, and the first EMC module, pull-up resistor, the 2nd EMC module and the first EMI module are parallel between power positive line and signal output line；The 3rd EMC module and the 2nd EMI module are parallel between signal output line and power cathode line；Power positive line is equipped with current-limiting circuit module, and current-limiting circuit module is electrically connected the first EMC module and pull-up resistor.The circuit design of the utility model entirety realizes that non-contact inductive measuring signal, long service life do not need contact testee, can also detect testee through nonmetallic substance or namagnetic substance by simple circuit structure.It realizes every sky detection and meets severe environment applications, product size is small, meets different space requirements, greatly improves user's space, and overall cost is low.

Description

A kind of micro magnetic sensor circuit

Technical field

The utility model relates to a kind of circuit, specially a kind of micro magnetic sensor circuit.

Background technique

Magnetic sensor is that the extraneous factors such as magnetic field, electric current, ess-strain, temperature, light are caused sensing element magnetic property Variation is converted into electric signal, detects the device of respective physical amount in this way.Magnetic Sensor be widely used in modern industry and The physical parameters such as electric current, position, direction are measured with induced magnetic field intensity in electronic product, in the prior art, there are many not The sensor of same type is for measuring magnetic field and other parameters.

Magnetic sensor is generally transmitted using the signal of mechanical system during use at present, such as microswitch, gently Touching switch, button switch etc., these modes are all the service life in such a way that sheet metal contacts with each other and reaches signal transmitting It is short, by a certain amount of dynamics area requirement is pressed with, there are the limitation of a certain amount of stroke range and mechanical service life, Er Qiefang The disadvantages of water grade is low, high failure rate.

Utility model content

The problem of for background technique, the utility model provide a kind of micro magnetic sensor circuit.

To achieve the above object, the utility model provides the following technical solutions: a kind of micro magnetic sensor circuit, including Signal acquisition module, the signal acquisition module is electrically connected with power positive line, power cathode line and signal output line, described The first EMC module, pull-up resistor, the 2nd EMC module and first are parallel between power positive line and the signal output line EMI module；The 3rd EMC module and the 2nd EMI module are parallel between the signal output line and the power cathode line；Institute Power positive line is stated equipped with current-limiting circuit module, the current-limiting circuit module is electrically connected the first EMC module and pull-up electricity Resistance.

As the utility model a preferred technical solution, the EMC module uses single capacitor or multiple capacitors Device combination.

As the utility model a preferred technical solution, the EMI module is using single component or multiple first devices Part combination.

As the utility model a preferred technical solution, the power positive line is equipped with current-limiting circuit, the limit Current circuit is electrically connected the first EMC module and pull-up resistor.

Compared with prior art, the utility model has the beneficial effects that the circuit design of the utility model entirety passes through letter Single circuit structure realizes that non-contact inductive measuring signal, long service life do not need contact testee, can also be saturating Nonmetallic substance or namagnetic substance are crossed to detect testee.It realizes every sky detection and meets severe environment applications, product Size is small, meets different space requirements, greatly improves user's space, and overall cost is low.

Detailed description of the invention

Fig. 1 is a kind of micro magnetic sensor circuit schematic diagram provided by the utility model；

In figure: 1- signal acquisition module；The first EMC module of 2-；The 2nd EMC module of 3-；The 3rd EMC module of 4-；5- first EMI module；The 2nd EMI module of 6-；7- pull-up resistor；8- current-limiting circuit module.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Embodiment:

Referring to Fig. 1, the utility model provides a kind of micro magnetic sensor circuit, including signal acquisition module 1, it is described Signal acquisition module 1 is electrically connected with power positive line, power cathode line and signal output line, the power positive line with it is described The first EMC module 2, pull-up resistor 7, the 2nd EMC module 3 and the first EMI module 5 are parallel between signal output line；It is described The 3rd EMC module 4 and the 2nd EMI module 6 are parallel between signal output line and the power cathode line；The positive pole Line is equipped with current-limiting circuit module 8, and the current-limiting circuit module 8 is electrically connected the first EMC module 5 and pull-up resistor 7.

The utility model is by signal acquisition module 1, EMC module, EMI module, pull-up resistor 7 and current-limiting circuit module 8 Etc. being minimized, integrated and modularization, user is according to practical application environment, any assembly circuit, to reach user Actual application needs, and advantageously accounts for user's practical problem, while save the cost in this way.As user needs main signal to adopt Collect module 1 and EMC module, other such as current-limiting circuit module, EMI module be it is unwanted, thus can be by it on circuit It is removed, to reach the purpose of save the cost.The especially application of automobile industry, cost control and technical requirements are all very Stringent.These circuit integrations are in the same PCB substrate, so that it may form small sensor probe, these modules can be with Arbitrary shape is arranged according to actual needs.In addition these modules are integrated in an interior of shell, this shell shape is can to appoint Unexpected shape, this sensor can penetrate air, plastics, and the nonmetallic substances such as glass detect.Detecting distance can be according to quilt Therefore surveying have relationship of the substance containing magnetic flux accurately can control position according to magnetic flux, reach Accurate Position Control.Magnetic Flux can be it is permanent, be also possible to it is interrupted, if electromagnetism is exactly interrupted.In this way can according to different attached magnetic materials, Select different application environments.

In the specific implementation process, the EMC module uses single capacitor or multiple capacitor banks.

In the specific implementation process, the EMI module is combined using single component or multiple components, as diode, TVS pipe etc..

Based on above-mentioned, it is simple that the utility model has advantages in that the circuit design of the utility model entirety passes through Circuit structure realizes that non-contact inductive measuring signal, long service life do not need contact testee, can also penetrate non- Metallics or namagnetic substance detect testee.It realizes every sky detection and meets severe environment applications, product size It is small, meet different space requirements, greatly improve user's space, overall cost is low.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model Protection scope within.

Claims

1. a kind of micro magnetic sensor circuit, including signal acquisition module, the signal acquisition module are being electrically connected with power supply just Polar curve, power cathode line and signal output line, it is characterised in that: between the power positive line and the signal output line simultaneously It is associated with the first EMC module, pull-up resistor, the 2nd EMC module and the first EMI module；The signal output line and the power supply The 3rd EMC module and the 2nd EMI module are parallel between negative line；The power positive line is equipped with current-limiting circuit module, The current-limiting circuit module is electrically connected the first EMC module and pull-up resistor.

2. a kind of micro magnetic sensor circuit according to claim 1, it is characterised in that: the EMC module is using single A capacitor or multiple capacitor banks.

3. a kind of micro magnetic sensor circuit according to claim 1, it is characterised in that: the EMI module is using single A component or the combination of multiple components.