CN203084002U - High-voltage hall type rotation speed sensor - Google Patents
High-voltage hall type rotation speed sensor Download PDFInfo
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- CN203084002U CN203084002U CN 201320091083 CN201320091083U CN203084002U CN 203084002 U CN203084002 U CN 203084002U CN 201320091083 CN201320091083 CN 201320091083 CN 201320091083 U CN201320091083 U CN 201320091083U CN 203084002 U CN203084002 U CN 203084002U
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Abstract
The utility model discloses a high-voltage hall type rotation speed sensor, which comprises a magnet, a hall element and a signal processing module, wherein the signal processing module comprises a power circuit, a filter circuit, an amplifying circuit, a shaping circuit and an output circuit; an input end of the power circuit is connected with a direct current power supply, and an output end of the power circuit is connected with the hall element and an input end of the shaping circuit respectively; a signal output end of the hall element is connected with the output circuit through the filter circuit, the amplifying circuit and the shaping circuit in sequence; an input end of the output circuit is also connected with the direct current power supply, and an output end of the output circuit outputs a high-voltage square wave signal; and the voltage of the direct current power supply is not less than 12 V. The high-voltage hall type rotation speed sensor can output higher working voltage, can convert a sine wave signal output by the hall element into a square wave signal and can be used for driving a pointer of a rotation speed dial to deflect on the premise of meeting the requirement of a computer on signal acquisition.
Description
Technical field
The utility model relates to a kind of speed probe, particularly a kind of hall-effect speed sensor.
Background technology
Along with the develop rapidly of automobile industry, the speed probe that is used for measured automobiles engine speed information just uses and gives birth to.The kind of speed probe is more, but adopts the more hall-effect speed sensor that still is.Hall-effect speed sensor comprises magnet, Hall element and signal processing module, and Hall element is installed on the magnet, and Hall element is vertically mounted on the top of motor car engine gear, and and gear between be provided with the gap; When gear rotates, change magnetic flux, thereby make Hall element export the signal of a near sinusoidal by Hall element.
The voltage signal peak value and the current signal of Hall element self output are all less, have only the hundreds of millivolt usually.If directly export to the rotating speed that car running computer is used to judge engine, can realize; But the actual signal of medium speed sensor output that uses also not merely is transferred to car running computer, also can be used for connecting the rotating speed dial plate, to drive the deflection of rotating speed dial plate middle finger pin, this just requires the signal of Hall element output to export bigger power to satisfy the driving requirement of load.But the operating voltage of Hall element self can only be 5V, so the signal of its output can not be higher than this magnitude of voltage naturally.
Summary of the invention
The technical matters that the utility model solves provides a kind of hall-effect speed sensor that can output HIGH voltage, to satisfy the driving demand of automobile middle rolling car computer and tachometer gage index.
For solving the problems of the technologies described above, technical solution adopted in the utility model is as follows.
The high voltage hall-effect speed sensor, comprise magnet, Hall element and signal processing module, the signal output part of described Hall element connects the input end of signal processing module, and described signal processing module comprises power circuit, filtering circuit, amplifying circuit, shaping circuit and output circuit; The input end of described power circuit connects direct supply, and the output terminal of power circuit is connected with the input end of Hall element and shaping circuit respectively; The signal output part of Hall element connects output circuit through filtering circuit, amplifying circuit, shaping circuit successively; The input end of output circuit also is connected with direct supply, the output terminal output HIGH voltage square-wave signal of output circuit; The voltage of described direct supply is not less than 12V.
The concrete structure of power circuit described in the utility model is: described power circuit comprises stabilivolt, first electric capacity and second electric capacity; The input end of stabilivolt connects direct supply, and the output terminal of stabilivolt is connected with the input end of Hall element and shaping circuit respectively; The input end of described stabilivolt and output terminal are respectively through first electric capacity and second capacity earth.
The concrete structure of filtering circuit described in the utility model is: described filtering circuit comprises the 3rd electric capacity and first resistance; The input end of the 3rd electric capacity connects the signal output part of Hall element, and the output terminal of the 3rd electric capacity connects the input end of amplifying circuit; The output terminal of described the 3rd electric capacity is also through first resistance eutral grounding.
The concrete structure of amplifying circuit described in the utility model is: described amplifying circuit comprises second resistance, the 3rd resistance, the 4th resistance and first operational amplifier; The input end of second resistance connects the 3rd electric capacity of filtering circuit, and the output terminal of second resistance connects the negative input end of first operational amplifier, and the positive input terminal of first operational amplifier is through the 3rd resistance eutral grounding; Described the 4th resistance is connected in parallel between the output terminal of the negative input end of first operational amplifier and first operational amplifier; The output terminal of first operational amplifier connects the input end of shaping circuit.
The concrete structure of shaping circuit described in the utility model is: described shaping circuit comprises the 7th resistance, the 8th resistance, the 9th resistance and second operational amplifier; The input end of the 7th resistance connects the output terminal of amplifying circuit first operational amplifier, the output terminal of the 7th resistance connects the negative input end of second operational amplifier, the positive input terminal of second operational amplifier is connected through the output terminal of the 8th resistance and stabilivolt, and the 9th resistance is connected in parallel between the output terminal of the positive input terminal of second operational amplifier and second operational amplifier; The output terminal of second operational amplifier connects the input end of output circuit.
The concrete structure of output circuit described in the utility model is: described output circuit comprises the tenth resistance, the 11 resistance and triode; The input end of the tenth resistance connects the output terminal of shaping circuit second operational amplifier, and the output terminal of the tenth resistance connects the base stage of triode, the grounded emitter of triode, and the collector of triode connects direct supply through the 11 resistance; The current collection of triode is the signal output part of signal processing module very.
Improvement of the present utility model is: described signal processing module also comprises the reference voltage circuit that is connected between power circuit and the shaping circuit, and described reference voltage circuit comprises output terminal and the 5th resistance between the ground and the 6th resistance that is connected in series in the power circuit stabilivolt; The input end of described shaping circuit the 8th resistance is connected with lead between the 5th resistance and the 6th resistance.
Owing to adopted above technical scheme, the obtained technical progress of the utility model is as follows.
Hall-effect speed sensor described in the utility model can be exported higher operating voltage, and can make the sine wave signal of Hall element output be converted to square-wave signal, be used for satisfying under the prerequisite of car running computer to signals collecting, the pointer that can drive the rotating speed dial plate carries out deflection.The setting of reference voltage circuit, the resistance that can change resistance R 5 and resistance R 6 according to the difference of user's demand provides different output voltages, has improved versatility of the present utility model.
Description of drawings
Fig. 1 is the circuit diagram of signal processing module described in the utility model.
Fig. 2 is the oscillogram of the utility model output signal.
Wherein: 11. power circuits, 33. filtering circuits, 44. amplifying circuits, 55. reference voltage circuits, 66. shaping circuits, 77. output circuits; V1. stabilivolt, C1. first electric capacity, C2. second electric capacity, C3. the 3rd electric capacity, R1. first resistance, R2. second resistance, R3. the 3rd resistance, R4. the 4th resistance, R5. the 5th resistance, R6. the 6th resistance, R7. the 7th resistance, R8. the 8th resistance, R9. the 9th resistance, R10. the tenth resistance, R11. the 11 resistance, AR1. first operational amplifier, AR2. second operational amplifier, Q1. Hall element, Q2. triode.
Embodiment
Below in conjunction with specific embodiments and the drawings, the utility model is further elaborated.
A kind of high voltage hall-effect speed sensor comprises magnet, Hall element Q1 and signal processing module, and Hall element is installed in the place ahead of magnet, and Hall element is vertically mounted on the top of motor car engine gear, and and gear between be provided with the gap; When gear rotated, Hall element Q1 induced the signal of one group of near sinusoidal, exports to signal processing module.
The circuit diagram of above-mentioned signal processing module comprises power circuit 11, filtering circuit 33, amplifying circuit 44, reference voltage circuit 55, shaping circuit 66 and output circuit 77 as shown in Figure 1.The input end of described power circuit 11 connects direct supply Vcc, and the output terminal of power circuit is connected with the input end of shaping circuit 66 with Hall element Q1 respectively; The signal output part of Hall element Q1 connects output circuit 77 through filtering circuit 33, amplifying circuit 44, shaping circuit 66 successively; Reference voltage circuit 55 is connected between power circuit 11 and the shaping circuit 66; The input end of output circuit 77 also is connected with direct supply Vcc, the output terminal output HIGH voltage square-wave signal of output circuit 77.Direct supply Vcc voltage is 12V in the present embodiment.
Described power circuit 11 comprises stabilivolt V1, first capacitor C 1 and second capacitor C 2; The input end Vin of stabilivolt V1 connects direct supply Vcc, and the output end vo ut of stabilivolt V1 is connected with the input end of shaping circuit 66 with Hall element Q1 respectively; The input end Vin of described stabilivolt V1 and output end vo ut are respectively through first capacitor C 1 and second capacitor C, 2 ground connection.First capacitor C 1 and second capacitor C 2 are used for filtering interference signals as electrical power by-pass electric capacity.
Described filtering circuit 33 is used for filtering out the disturbing pulse that signal that Hall element induces occurs, not amplified by the amplifying circuit of back.Filtering circuit 33 comprises the 3rd capacitor C 3 and first resistance R 1; The input end of the 3rd capacitor C 3 connects the signal output part of Hall element, and the output terminal of the 3rd capacitor C 3 connects the input end of amplifying circuit 44; The output terminal of described the 3rd capacitor C 3 is also through first resistance R, 1 ground connection.
Described amplifying circuit 44 comprises second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4 and the first operational amplifier A R1; The output terminal of the 3rd capacitor C 3, the second resistance R 2 of the input end connection filtering circuit 33 of second resistance R 2 connects the negative input end of the first operational amplifier A R1, and the positive input terminal of the first operational amplifier A R1 is through the 3rd resistance R 3 ground connection; Described the 4th resistance R 4 is connected in parallel between the output terminal of the negative input end of the first operational amplifier A R1 and the first operational amplifier A R1; The ratio of the 4th resistance and second resistance is the enlargement factor of the first operational amplifier A R1, by changing the resistance of the 4th resistance or second resistance, can change enlargement factor.The output terminal of the first operational amplifier A R1 connects the input end of shaping circuit 66.
Described reference voltage circuit 55 comprises output end vo ut and the 5th resistance R 5 between the ground and the 6th resistance R 6 that is connected in series in power circuit 11 stabilivolt V1.
Described shaping circuit 66 comprises the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9 and the second operational amplifier A R2; The input end of the 7th resistance R 7 connects the output terminal of amplifying circuit 44 first operational amplifier A R1, the output terminal of the 7th resistance R 7 connects the negative input end of the second operational amplifier A R2, the positive input terminal of the second operational amplifier A R2 is connected with lead between the 5th resistance R 5 and the 6th resistance R 6 through the 8th resistance R 8, and the 9th resistance R 9 is connected in parallel between the output terminal of the positive input terminal of the second operational amplifier A R2 and the second operational amplifier A R2; The output terminal of the second operational amplifier A R2 connects the input end of output circuit 77.Signal after shaping circuit will amplify by with the comparison of reference voltage threshold value, shaping output square-wave signal.
Described output circuit 77 comprises the tenth resistance R the 10, the 11 resistance R 11 and triode Q2; The input end of the tenth resistance R 10 connects the output terminal of shaping circuit 66 second operational amplifier A R2, the output terminal of the tenth resistance R 10 connects the base stage of triode Q2, the grounded emitter of triode Q2, the collector of triode Q2 connects direct supply Vcc through the 11 resistance R 11; The current collection of triode Q2 is the signal output part OUT of signal processing module very.The waveform of output circuit as shown in Figure 2.
Principle of work of the present utility model is as described below:
After power circuit is connected direct supply Vcc voltage 12V, after stabilivolt V1 voltage stabilizing, output dc voltage 5V.This moment, the 5V power supply was powered to Hall element Q1, the first operational amplifier A R1, the second operational amplifier A R2 and the 5th resistance R 5.First capacitor C 1 in the power circuit and second capacitor C 2 are used to filter out power supply input and the disturbing pulse of exporting as shunt capacitance.
After engine got electric work, Hall element Q1 can induce the signal of a near sinusoidal ripple when engine gear rotated.Sine wave signal enters into the amplifying circuit of being made up of second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4 and the first operational amplifier A R1 after filtering out disturbing pulse through the 3rd capacitor C 3 and first resistance R 1, adjust the resistance of the 4th resistance R 4 and second resistance R 2, obtain the enlargement factor of being wanted.Sine wave signal enters in the shaping circuit of being made up of the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9 and the second operational amplifier A R2 after amplifying, and the reference voltage of shaping circuit is by the 5th resistance R 5 and 6 decisions of the 6th resistance R.The second operational amplifier A R2 is shaped to square-wave signal after sine wave signal and reference voltage are compared.Square-wave signal enters in the output circuit that is combined into by the tenth resistance R the 10, the 11 resistance R 11, triode Q2 again, through the effect of pull-up resistor R11 and triode Q2, reach the electric current that can satisfy driving tachometer gage index and export to running computer and panel board.
Claims (7)
1. high voltage hall-effect speed sensor, comprise magnet, Hall element (Q1) and signal processing module, the signal output part of described Hall element (Q1) connects the input end of signal processing module, and it is characterized in that: described signal processing module comprises power circuit (11), filtering circuit (33), amplifying circuit (44), shaping circuit (66) and output circuit (77); The input end of described power circuit (11) connects direct supply (Vcc), and the output terminal of power circuit is connected with the input end of Hall element (Q1) with shaping circuit (66) respectively; The signal output part of Hall element (Q1) connects output circuit (77) through filtering circuit (33), amplifying circuit (44), shaping circuit (66) successively; The input end of output circuit (77) also is connected with direct supply (Vcc), the output terminal output HIGH voltage square-wave signal of output circuit (77); The voltage of described direct supply (Vcc) is not less than 12V.
2. high voltage hall-effect speed sensor according to claim 1 is characterized in that: described power circuit (11) comprises stabilivolt (V1), first electric capacity (C1) and second electric capacity (C2); The input end (Vin) of stabilivolt (V1) connects direct supply (Vcc), and the output terminal (Vout) of stabilivolt (V1) is connected with the input end of Hall element (Q1) with shaping circuit (66) respectively; The input end (Vin) of described stabilivolt (V1) and output terminal (Vout) are respectively through first electric capacity (C1) and second electric capacity (C2) ground connection.
3. high voltage hall-effect speed sensor according to claim 2 is characterized in that: described filtering circuit (33) comprises the 3rd electric capacity (C3) and first resistance (R1); The input end of the 3rd electric capacity (C3) connects the signal output part of Hall element, and the output terminal of the 3rd electric capacity (C3) connects the input end of amplifying circuit (44); The output terminal of described the 3rd electric capacity (C3) is also through first resistance (R1) ground connection.
4. high voltage hall-effect speed sensor according to claim 3 is characterized in that: described amplifying circuit (44) comprises second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4) and first operational amplifier (AR1); The input end of second resistance (R2) connects the 3rd electric capacity (C3) of filtering circuit (33), the output terminal of second resistance (R2) connects the negative input end of first operational amplifier (AR1), and the positive input terminal of first operational amplifier (AR1) is through the 3rd resistance (R3) ground connection; Described the 4th resistance (R4) is connected in parallel between the output terminal of the negative input end of first operational amplifier (AR1) and first operational amplifier (AR1); The output terminal of first operational amplifier (AR1) connects the input end of shaping circuit (66).
5. high voltage hall-effect speed sensor according to claim 4 is characterized in that: described shaping circuit (66) comprises the 7th resistance (R7), the 8th resistance (R8), the 9th resistance (R9) and second operational amplifier (AR2); The input end of the 7th resistance (R7) connects the output terminal of amplifying circuit (44) first operational amplifiers (AR1), the output terminal of the 7th resistance (R7) connects the negative input end of second operational amplifier (AR2), the positive input terminal of second operational amplifier (AR2) is connected through the output terminal (Vout) of the 8th resistance (R8) and stabilivolt (V1), and the 9th resistance (R9) is connected in parallel between the output terminal of the positive input terminal of second operational amplifier (AR2) and second operational amplifier (AR2); The output terminal of second operational amplifier (AR2) connects the input end of output circuit (77).
6. high voltage hall-effect speed sensor according to claim 5 is characterized in that: described output circuit (77) comprises the tenth resistance (R10), the 11 resistance (R11) and triode (Q2); The input end of the tenth resistance (R10) connects the output terminal of shaping circuit (66) second operational amplifiers (AR2), the output terminal of the tenth resistance (R10) connects the base stage of triode (Q2), the grounded emitter of triode (Q2), the collector of triode (Q2) connects direct supply (Vcc) through the 11 resistance (R11); The current collection of triode (Q2) is the signal output part of signal processing module very.
7. high voltage hall-effect speed sensor according to claim 6, it is characterized in that: described signal processing module also comprises the reference voltage circuit (55) that is connected between power circuit (11) and the shaping circuit (66), and described reference voltage circuit (55) comprises output terminal (Vout) and the 5th resistance (R5) between the ground and the 6th resistance (R6) that is connected in series in power circuit (11) stabilivolt (V1); The input end of described shaping circuit (66) the 8th resistance (R8) is connected with lead between the 5th resistance (R5) and the 6th resistance (R6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320091083 CN203084002U (en) | 2013-02-28 | 2013-02-28 | High-voltage hall type rotation speed sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320091083 CN203084002U (en) | 2013-02-28 | 2013-02-28 | High-voltage hall type rotation speed sensor |
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| CN203084002U true CN203084002U (en) | 2013-07-24 |
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| CN 201320091083 Expired - Lifetime CN203084002U (en) | 2013-02-28 | 2013-02-28 | High-voltage hall type rotation speed sensor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103134943A (en) * | 2013-02-28 | 2013-06-05 | 无锡隆盛科技股份有限公司 | High-voltage Hall type rotating speed sensor |
| CN105181994A (en) * | 2015-10-13 | 2015-12-23 | 珠海格力电器股份有限公司 | Method and system for detecting rotating speed of direct current motor |
| CN110784131A (en) * | 2019-10-31 | 2020-02-11 | 江苏科技大学 | Hall signal acquisition device and working method thereof |
-
2013
- 2013-02-28 CN CN 201320091083 patent/CN203084002U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103134943A (en) * | 2013-02-28 | 2013-06-05 | 无锡隆盛科技股份有限公司 | High-voltage Hall type rotating speed sensor |
| CN103134943B (en) * | 2013-02-28 | 2015-03-18 | 无锡隆盛科技股份有限公司 | High-voltage Hall type rotating speed sensor |
| CN105181994A (en) * | 2015-10-13 | 2015-12-23 | 珠海格力电器股份有限公司 | Method and system for detecting rotating speed of direct current motor |
| CN105181994B (en) * | 2015-10-13 | 2018-09-07 | 珠海格力电器股份有限公司 | Method and system for detecting rotating speed of direct current motor |
| CN110784131A (en) * | 2019-10-31 | 2020-02-11 | 江苏科技大学 | Hall signal acquisition device and working method thereof |
| CN110784131B (en) * | 2019-10-31 | 2021-05-04 | 江苏科技大学 | Hall signal acquisition device and working method thereof |
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Granted publication date: 20130724 |
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