CN2795860Y - Giant magnet resistor rotation speed sensor - Google Patents
Giant magnet resistor rotation speed sensor Download PDFInfo
- Publication number
- CN2795860Y CN2795860Y CN 200520020082 CN200520020082U CN2795860Y CN 2795860 Y CN2795860 Y CN 2795860Y CN 200520020082 CN200520020082 CN 200520020082 CN 200520020082 U CN200520020082 U CN 200520020082U CN 2795860 Y CN2795860 Y CN 2795860Y
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- China
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- signal
- pin
- operational amplifier
- transport
- sensing element
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Abstract
The utility model relates to a giant magnet resistor rotation speed sensor. In a signal processing circuit, resistors R1, R2, R3 and R4 and an operational amplifier L1 form a signal amplification circuit, and resistors R5, R6 and R7 and an operational amplifier L2 form a signal converting circuit; signals generated by a giant magnet resistor GMR sensing element are output through a base pin S1, input through a base pin 2 of the operational amplifier L1 and output through a base pin 1 of the operational amplifier L1, amplified signals are input through a base pin 5 of the operational amplifier L2, a base pin 7 of the operational amplifier L2 outputs converted signals and the converted signals is transmitted to a signal output end through the collector of a triode N1. Besides, the upper surface of the giant magnet resistor GMR sensing element is provided with permanent magnetic steel and a magnetic conductive signal tooth disk of which the circumference is provided with a plurality of teeth is arranged below the giant magnet resistor GMR sensing element. The utility model has the advantages that the structure is simple; the value of an output voltage is constant; the frequency of square signals are changed along with the rotation speed of the signal tooth disk. The utility model can be conveniently applied to various occasions measuring the rotation speed.
Description
Affiliated technical field
The utility model relates to a kind of giant magnetoresistance GMR speed probe, is particularly useful for measuring the size of rotating speed.
Background technology
State Intellectual Property Office in the magneto-electric automotive speed sensor utility model patent of bulletin on February 26th, 2003 is, be installed on the support, permanent-magnet steel is arranged in sensor outer housing, with permanent-magnet steel join be the coiling inductive coil soft magnet core, sensor outer housing one side is equipped with the shielded conductor that links to each other with inductive coil, below the support, be provided with the signal fluted disc of uniform several teeth of the anodontia remainder of excircle the preceding paragraph.This signal of sensor is sinusoidal wave, and signal voltage value changes with the size of the rotating speed of fluted disc, and from 0.4V～70V, obviously sort signal can not directly be utilized, must must there be a circuit that signal Processing is become square wave, be transferred to pick-up unit then.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned weak point, provide a kind of simple in structure, volume is little, output voltage values is constant, frequency is with the square-wave signal of fluted disc rotation speed change.
The technical solution adopted in the utility model is: the giant magnetoresistance sensing element, by three pin S1, S2, S3 inserts a signal processing circuit, signal processing circuit is by resistance R 1, R2, R3, R4 and transport and placing device L1 constitute signal amplification circuit, by resistance R 5, R6, the signaling conversion circuit that R7 and transport and placing device L2 constitute, the signal that giant magnetoresistance GMR sensing element produces are by pin S1 output, through the pin two input of transport and placing device L1, pin one output by transport and placing device L1, signal after the amplification by the signal after the pin 7 output conversions of transport and placing device L2, is delivered to signal output part through the current collection collection of triode N1 through pin 5 inputs of transport and placing device L2, be provided with a permanent-magnet steel on giant magnetoresistance GMR sensing element, the below is provided with the magnetic conduction signal of several teeth fluted disc on the excircle.
Advantage of the present utility model is: volume is little, simple in structure, output voltage values is constant, and frequency is with the square-wave signal of fluted disc rotation speed change, and can realize that zero rotating speed detects, and can be conveniently used in the occasion of various measurement rotating speeds.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model;
Fig. 2 is that the utility model constitutes synoptic diagram.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
By Fig. 1 one Fig. 2 as seen, giant magnetoresistance sensing element 1 is by three pin S1, S2, S3 inserts a signal processing circuit 2, signal processing circuit 2 is by resistance R 1, R2, R3, R4 and transport and placing device L1 constitute signal amplification circuit, by resistance R 5, R6, the signaling conversion circuit that R7 and transport and placing device L2 constitute, the signal that giant magnetoresistance GMR sensing element 1 produces are by pin S1 output, through the pin two input of transport and placing device L1, pin one output by transport and placing device L1, signal after the amplification by the signal after the pin 7 output conversions of transport and placing device L2, is delivered to signal output part 4 through the current collection collection of triode N1 through pin 5 inputs of transport and placing device L2, be provided with a permanent-magnet steel 8 on giant magnetoresistance GMR sensing element 1, the below is provided with the magnetic conduction signal of several teeth fluted disc 6 on the excircle.
When using the utility model, need between the positive source 3 of signal processing circuit 2 and earth terminal 5, connect the 12V direct supply, below giant magnetoresistance sensing element 1, being provided with has the magnetic conduction signal of several teeth fluted disc 6 on the excircle, leave a gap 7 between giant magnetoresistance sensing element 1 and the magnetic conduction signal fluted disc 6.When magnetic conduction signal fluted disc 6 rotates, formed the air-gap field of alternation between giant magnetoresistance sensing element 1 and the signal fluted disc 6, the pin S1 of giant magnetoresistance sensing element 1 has exported feeble signal thus, is connected to the pin two of transport and placing device L1 through resistance R 3.The signal that is exaggerated is by the pin one output of transport and placing device L1, deliver to the pin 5 of transport and placing device L2 through resistance R 5, the signal that is converted is sent by the pin 7 of transport and placing device L2, current collection collection through triode N1 is delivered to signal output part 4, what this end was exported is that magnitude of voltage is constant, frequency is passed to checkout equipment to this signal with the square-wave signal of fluted disc rotation speed change, just can obtain the size of the rotating speed of fluted disc.
Claims (1)
1. giant magnetoresistance GMR speed probe, comprise giant magnetoresistance GMR sensing element, it is characterized in that: signal processing circuit (2) is by resistance R 1, R2, R3, R4 and transport and placing device L1 constitute signal amplification circuit, by resistance R 5, R6, the signaling conversion circuit that R7 and transport and placing device L2 constitute, the signal that giant magnetoresistance GMR sensing element (1) produces are by pin S1 output, through the pin two input of transport and placing device L1, pin one output by transport and placing device L1, signal after the amplification by the signal after the pin 7 output conversions of transport and placing device L2, is delivered to signal output part (4) through the current collection collection of triode N1 through pin 5 inputs of transport and placing device L2, be provided with a permanent-magnet steel (8) on giant magnetoresistance GMR sensing element (1), the below is provided with the magnetic conduction signal of several teeth fluted disc (6) on the excircle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520020082 CN2795860Y (en) | 2005-01-17 | 2005-01-17 | Giant magnet resistor rotation speed sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520020082 CN2795860Y (en) | 2005-01-17 | 2005-01-17 | Giant magnet resistor rotation speed sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2795860Y true CN2795860Y (en) | 2006-07-12 |
Family
ID=36813615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520020082 Expired - Fee Related CN2795860Y (en) | 2005-01-17 | 2005-01-17 | Giant magnet resistor rotation speed sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2795860Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102968895A (en) * | 2012-11-22 | 2013-03-13 | 昆山北极光电子科技有限公司 | Remote distance transmission method of generator speed |
-
2005
- 2005-01-17 CN CN 200520020082 patent/CN2795860Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102968895A (en) * | 2012-11-22 | 2013-03-13 | 昆山北极光电子科技有限公司 | Remote distance transmission method of generator speed |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Chongqing Chang'an Chiyeung Automotive Electrics Co., Ltd. Assignor: Zhiyang Automotive Electrical Co., Ltd., Harbin Contract record no.: 2012500000038 Denomination of utility model: Giant magnet resistor rotation speed sensor Granted publication date: 20060712 License type: Exclusive License Record date: 20120427 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060712 Termination date: 20130117 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |