CN201340427Y - Ultra-far distance magnetic-approaching rotating speed sensor - Google Patents
Ultra-far distance magnetic-approaching rotating speed sensor Download PDFInfo
- Publication number
- CN201340427Y CN201340427Y CNU2009200385367U CN200920038536U CN201340427Y CN 201340427 Y CN201340427 Y CN 201340427Y CN U2009200385367 U CNU2009200385367 U CN U2009200385367U CN 200920038536 U CN200920038536 U CN 200920038536U CN 201340427 Y CN201340427 Y CN 201340427Y
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- China
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- wiring board
- board unit
- rotating speed
- shell
- speed sensor
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- Expired - Fee Related
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The utility model relates to an ultra-far distance magnetic-approaching rotating speed sensor. The detecting distance of the rotating speed sensor is far larger than that of like products, and the detecting object can be a permanent magnet or a ferromagnetic material. In a threaded metal shell, a linear Hall integrated circuit, a computing amplifier, a triode, a filter capacitor, a voltage dividing resistor and a diode are welded on a circuit board, and are led out by a tri-color sheath wire in a connecting manner. When the magnet rotates at certain distance from the end face of the sensor, the linear Hall integrated circuit inducts weak change of a magnetic field, outputs a voltage value with low amplitude, inputs a Schmitt trigger by two-stage amplifying and filtering to carry out reshaping, outputs high/low levels, and is then connected with the output of the light-emitting diode by the triode. By adopting the above method, the ultra-far distance magnetic-approaching rotating speed sensor overcomes the disadvantages that the sensitivity is only inducted by a Hall element originally, and the detecting distance is short.
Description
Technical field
This practicality newly relates to a kind of overlength distance magnetic near speed probe, be used to detect distance and be more than like product, and detected object can be that the detection permanent magnet also can be a ferromagnetic material.
Background technology
The magnetic class sensor of present known detection rotating speed is many, such as proximity Hall switch, Hall speed probe, structure is made up of Hall integrated circuit, current-limiting resistance, stabilivolt, filter capacitor, pull-up resistor, when the front has permanent magnet or ferromagnetic material close, Hall element output level state changes, when permanent magnet or ferromagnetic material left, the Hall element output level returned to original state.But general Hall speed probe detects distance has only several millimeters, even shorter, and this is to bringing very big inconvenience on the user installation.
The utility model content
1, technical matters to be solved:
At above deficiency, the utility model provides a kind of a kind of overlength distance magnetic that detects distance and can detect permanent magnet and ferromagnetic material near speed probe.
2, technical scheme:
The utility model comprises RVV 1, wiring board unit 2, epoxy resin 3, shell 4, heat-shrinkable T bush 5; Wiring board unit 2 links together with RVV 1, heat-shrinkable T bush 5 is with wiring board unit 2 and RVV 1 coupling part sealed insulation, wiring board unit 2 places in the shell 4, and epoxy resin 3 is filled between shell 4 and the wiring board unit 2, and epoxy resin 3 closely connects together with shell 4.The Hall integrated circuit IC1 of described wiring board unit 2 is connected to the inverting input of amplifier IC1 successively by coupling capacitance C1 and input R1, the in-phase end of IC2 connects R3 and R4, input end and the output terminal of C2 and resistance R 2 parallel connections and IC2, IC2 output connects second level input resistance R5 connection IC3 by the mode of C3 AC coupling, R7, the R8 dividing potential drop is connected to the in-phase end of IC3, IC3 feedback resistance R6 and filter capacitor C4 are connected to the IC3 output terminal, be connected to the IC4 end of oppisite phase, IC4 passes through R11, the R12 dividing potential drop arrives the IC4 in-phase end by R10, positive feedback resistor R9 connects IC4 in-phase end and output terminal, constitute Schmidt trigger, IC4 is connected to the base stage of triode T1 by current-limiting resistance R13, radiation utmost point ground connection, collector is connected on the power supply with light emitting diode by pull-up resistor R14.
3, beneficial effect:
The utility model not only can detect permanent magnet and ferromagnetic material, and the faint variation in magnetic field has high sensitivity to external world, detects distance and can reach 5CM (detected object is a diameter 5mm magnet); The function that detects distance is more arranged.And it is strong to have an antijamming capability, the characteristics of long service life.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model;
Fig. 2 is a longitudinal profile of the present utility model structural map.
Embodiment
In being threaded metal shell, linear Hall integrated circuit, operational amplifier, triode, filter capacitor, divider resistance, diode weld in the circuit board, are connected with three look RVV and draw.When magnet range sensor end face certain distance rotates, the linear Hall integrated circuit is sensed the small and weak variation in magnetic field, the magnitude of voltage that output amplitude is less, amplify and filtering by two-stage, the input Schmidt trigger is through the row shaping, the output high-low level connects light emitting diode output by triode again.Replace originally depending alone the induction sensitivity of Hall element own by this method, detected the short defective of distance.
In Fig. 1, Hall integrated circuit IC1 is connected to the inverting input of amplifier IC1 successively by coupling capacitance C1 and input R1, the in-phase end of IC2 connects R3 and R4, input end and the output terminal of C2 and resistance R 2 parallel connections and IC2, IC2 output connects second level input resistance R5 connection IC3 by the mode of C3 AC coupling, R7, the R8 dividing potential drop is connected to the in-phase end of IC3, IC3 feedback resistance R6 and filter capacitor C4 are connected to the IC3 output terminal, be connected to the IC4 end of oppisite phase, IC4 passes through R11, the R12 dividing potential drop arrives the IC4 in-phase end by R10, positive feedback resistor R9 connects IC4 in-phase end and output terminal, constitute Schmidt trigger, IC4 is connected to the base stage of triode T1 by current-limiting resistance R13, radiation utmost point ground connection, collector is connected on the power supply with light emitting diode by pull-up resistor R14.When IC1 sensed signal, amplifying again through IC2, IC3 two-stage, the shaping of process IC4 formed the promotion triode T1 conducting of high-low level signal and ends.Light emitting diode is luminous with the conducting of triode, with triode by extinguishing.R1, R2, R3, R4 resistance value are according to the decision that detects distance, and filter capacitor C1, C2, C3, C4 decide according to the speed of operation.
Among Fig. 2,1 is that RVV, 2 is that wiring board unit, 3 is that epoxy resin, 4 is that shell, 5 is heat-shrinkable T bush.
Wiring board unit 2 (comprises the linear Hall integrated circuit, amplifying circuit, Schmidt trigger, triode, resistance, electric capacity, the light emitting diode wiring board is formed) link together with RVV 1, heat-shrinkable T bush 5 is with wiring board unit 2 and RVV 1 coupling part sealed insulation, and wiring board unit 2 places in the shell 4, epoxy resin 3 is filled between shell 4 and the wiring board unit 2, and epoxy resin 3 closely connects together with shell 4.
Though the utility model with preferred embodiment openly as above; but they are not to be used for limiting the utility model; anyly have the knack of this skill person; in the spirit and scope that do not break away from the utility model; can do various variations or retouching from working as, what therefore protection domain of the present utility model should be defined with the application's claim protection domain is as the criterion.
Claims (2)
1, a kind of overlength distance magnetic is characterized in that near speed probe: comprise RVV (1), wiring board unit (2), epoxy resin (3), shell (4), heat-shrinkable T bush (5); Wiring board unit (2) links together with RVV (1), heat-shrinkable T bush (5) is with wiring board unit (2) and RVV (1) coupling part sealed insulation, wiring board unit (2) places in the shell (4), epoxy resin (3) is filled between shell (4) and the wiring board unit (2), and epoxy resin (3) closely connects together with shell (4).
2, overlength distance magnetic according to claim 1 is near speed probe, it is characterized in that: the Hall integrated circuit IC1 of described wiring board unit (2) is connected to the inverting input of amplifier IC1 successively by coupling capacitance C1 and input R1, the in-phase end of IC2 connects R3 and R4, input end and the output terminal of C2 and resistance R 2 parallel connections and IC2, IC2 output connects second level input resistance R5 connection IC3 by the mode of C3 AC coupling, R7, the R8 dividing potential drop is connected to the in-phase end of IC3, IC3 feedback resistance R6 and filter capacitor C4 are connected to the IC3 output terminal, be connected to the IC4 end of oppisite phase, IC4 passes through R11, the R12 dividing potential drop arrives the IC4 in-phase end by R10, positive feedback resistor R9 connects IC4 in-phase end and output terminal, constitute Schmidt trigger, IC4 is connected to the base stage of triode T1 by current-limiting resistance R13, radiation utmost point ground connection, collector is connected on the power supply with light emitting diode by pull-up resistor R14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200385367U CN201340427Y (en) | 2009-01-13 | 2009-01-13 | Ultra-far distance magnetic-approaching rotating speed sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200385367U CN201340427Y (en) | 2009-01-13 | 2009-01-13 | Ultra-far distance magnetic-approaching rotating speed sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201340427Y true CN201340427Y (en) | 2009-11-04 |
Family
ID=41235970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200385367U Expired - Fee Related CN201340427Y (en) | 2009-01-13 | 2009-01-13 | Ultra-far distance magnetic-approaching rotating speed sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201340427Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788997A (en) * | 2011-05-17 | 2012-11-21 | 森萨塔科技公司 | Magnetic proximity sensor |
| CN106896237A (en) * | 2017-01-11 | 2017-06-27 | 深圳市燕麦科技股份有限公司 | A kind of mobile phone d.c. motor rotating speed measurement method and device |
-
2009
- 2009-01-13 CN CNU2009200385367U patent/CN201340427Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788997A (en) * | 2011-05-17 | 2012-11-21 | 森萨塔科技公司 | Magnetic proximity sensor |
| CN102788997B (en) * | 2011-05-17 | 2017-10-03 | 森萨塔科技公司 | Magnetic proximity transducer |
| CN106896237A (en) * | 2017-01-11 | 2017-06-27 | 深圳市燕麦科技股份有限公司 | A kind of mobile phone d.c. motor rotating speed measurement method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091104 Termination date: 20130113 |