CN202837318U - Engine rotating speed measuring device based on magnetic encoder - Google Patents
Engine rotating speed measuring device based on magnetic encoder Download PDFInfo
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- CN202837318U CN202837318U CN 201220409188 CN201220409188U CN202837318U CN 202837318 U CN202837318 U CN 202837318U CN 201220409188 CN201220409188 CN 201220409188 CN 201220409188 U CN201220409188 U CN 201220409188U CN 202837318 U CN202837318 U CN 202837318U
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- bipolar magnet
- engine
- turntable
- chip
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Abstract
An engine rotating speed measuring device based on a magnetic encoder comprises a rotary movement mechanism and a sensor arranged on a crankshaft, and the rotary movement mechanism comprises a main turntable arranged on the crankshaft and an auxiliary turntable driven by the main turntable to rotate; the middle part of the outside end face of the auxiliary turntable is equipped with a bipolar magnet, and a hall effect or magnetoresistance effect chip is arranged in the interior of the sensor and is located above or below the bipolar magnet; the bipolar magnet is rotated along with the auxiliary turntable, and the sensor arranged above or below the bipolar magnet senses a magnetic field signal of the bipolar magnet, and transmits the signal to an engine control unit for processing. The main turntable and the auxiliary turntable can be made very small, thereby reducing the volume of the engine rotating speed measuring device substantially; the resolution of the chip in the sensor can reach 0.35 degree at present, thereby improving the detection precision substantially.
Description
Technical field
The utility model relates to rotation-speed measuring device, especially a kind of measurement of engine rotate speed device based on magnetic encoder for automobile or motorcycle engine control system.
Background technology
Along with the enforcement of motorcycle exhaust discharging state III standard, the electronic fuel injection technology progressively is applied.Crankshaft position sensor is installed in the motorcycle engine system usually, and crankshaft position sensor is used for confirming crank position, also can measure engine speed simultaneously.
A kind of iron teeth wheel disc is all used in the at present detection of crank position, and back of the body magnet in chip back is seen Fig. 1.So just installing space has been proposed larger requirement, size is larger, and existing iron teeth wheel disc is because number of teeth restriction accuracy of detection is not high enough.
Summary of the invention
For the prior art above shortcomings, the utility model provides a kind of compact conformation, and size is little, the measurement of engine rotate speed device based on magnetic encoder that accuracy of detection is high.
To achieve these goals, the purpose of this utility model is achieved in that
Measurement of engine rotate speed device based on magnetic encoder, comprise the rotational motion mechanism and the sensor that are installed on the bent axle, it is characterized in that: described rotational motion mechanism comprises the main turntable that is installed on the bent axle and the secondary rotating disk that is driven running by this main turntable, at the outside of this pair rotating disk end face middle part bipolar magnet is installed, described sensor internal comprises Hall effect or magnetoresistance effect chip, and this Hall effect or magnetoresistance effect chip are positioned at top or the below of described bipolar magnet.
Described sensor comprises the circuit board that is installed in its plastic casing inside, be equipped with on this circuit board be used to the Hall effect that receives described bipolar magnet field signal or magnetoresistance effect chip, this Hall effect or magnetoresistance effect chip are connected with the filtering circuit that is welded on the described circuit board, described sensor also is provided with for the contact pin that is connected by wire harness with control unit of engine, one end of this contact pin is welded on the circuit board, and the other end exposes the outside surface of sensor.
Of the present utility model have a following advantage:
The utility model drives secondary rotating disk running by the main turntable that is installed on the bent axle, bipolar magnet is installed at secondary rotating disk middle part, bipolar magnet is followed secondary turntable rotation, be installed in the field signal of the sensor senses bipolar magnet of bipolar magnet top or below, and transfer signals to control unit of engine and process.It is very little that main turntable and secondary rotating disk can be made, and greatly dwindled the volume of this measurement of engine rotate speed device, is suitable for installing and using.The resolution of sensor chips can reach 0.35 degree at present, and namely 1024 positions of every circle have been improved the precision that detects greatly;
Measurement of engine rotate speed device of the present utility model also has characteristics simple in structure, with low cost, adopt plastic casing with sensor package, antijamming capability is strong, and this speed measuring device need not calibration and temperature compensation, anti-harsh and unforgiving environments, is applicable to the engine control system of motorcycle or automobile.
Description of drawings
Fig. 1-existing contactless iron teeth wheel disc is measured the synoptic diagram of engine speed;
Fig. 2-synoptic diagram of the present utility model;
Fig. 3-embodiment synoptic diagram of the present utility model;
Fig. 4-sensor circuit block diagram of the present utility model.
Embodiment
Below in conjunction with specific embodiment the utility model is described in further detail.
Shown in Fig. 2 and 4, measurement of engine rotate speed device based on magnetic encoder, comprise the rotational motion mechanism and the sensor that are installed on the bent axle 8, this rotational motion mechanism comprises the main turntable 1 that is installed on the bent axle 8 and the secondary rotating disk 2 that is driven running by this main turntable 1, at the outside of this pair rotating disk 2 end face middle part bipolar magnet 3 is installed, described sensor 5 inside comprise Hall effect or magnetoresistance effect chip 4, and this Hall effect or magnetoresistance effect chip 4 are positioned at top or the below of described bipolar magnet 3.
Described sensor 5 comprises the circuit board 6 that is installed in its plastic casing inside, be equipped with on this circuit board 6 be used to the Hall effect that receives described bipolar magnet 3 field signals or magnetoresistance effect chip 4, this Hall effect or magnetoresistance effect chip 4 are connected with the filtering circuit that is welded on the described circuit board 6, described sensor 5 also is provided with for the contact pin 7 that is connected by wire harness with control unit of engine, one end of this contact pin 7 is welded on the circuit board 6, the other end exposes the outside surface of sensor, this contact pin 7 is connected with control unit of engine by wire harness, realizes the signal transmission of sensor 5.
The linearity output that the form of sensor 5 output signals can synchronous serial interface (SSI or SPI), supply voltage is arrived in quadrature A/B output, the output of step/direction, brshless DC motor commutation pattern, zero etc.
As shown in Figure 3, main turntable 1 and secondary rotating disk 2 can adopt the toothed disc of two tooth mesh, but also are not limited to adopt the meshed gears dish.Main turntable 1 is installed on the bent axle, and bipolar magnet 3 is installed by connecting link in secondary rotating disk 2 middle parts.
The utility model is by being installed in the main turntable on the bent axle, and main turntable replaces phase disk, more secondary rotating disk is mechanically connected on the main turntable, drives secondary rotating disk running.At secondary rotating disk middle part bipolar magnet is installed, bipolar magnet is followed secondary turntable rotation, be installed in the field signal of the sensor 5 perception bipolar magnet of bipolar magnet top or below, field signal carries out computing through being transferred to control unit of engine after the processing such as filtering of sensor 5.It is very little that main turntable and secondary rotating disk can be made, and greatly dwindled the volume of this measurement of engine rotate speed device, is suitable for installing and using.
The Hall effect that sensor 5 adopts in the present embodiment or the resolution of magnetoresistance effect chip 4 are 0.35 degree, and namely every circle can detect 1024 positions, compare with phase disk and have greatly improved the precision that detects.
Measurement of engine rotate speed device of the present utility model also has characteristics simple in structure, with low cost, adopt plastic casing with sensor package, antijamming capability is strong, and this speed measuring device need not calibration and temperature compensation, anti-harsh and unforgiving environments, is applicable to the engine control system of motorcycle or automobile.
Above-mentioned example of the present utility model only be that explanation the utility model does for example, and be not to be restriction to embodiment of the present utility model.For the ordinary people in affiliated field also, can also make on the basis of the above description other multi-form variation and change.Here can't give all embodiments exhaustive.Everyly belong to the row that apparent variation that the technical solution of the utility model amplifies out or change still are in protection domain of the present utility model.
Claims (2)
1. based on the measurement of engine rotate speed device of magnetic encoder, comprise the rotational motion mechanism and the sensor that are installed on the bent axle, it is characterized in that: described rotational motion mechanism comprises the main turntable (1) that is installed on the bent axle and the secondary rotating disk (2) that is driven running by this main turntable (1), at the outside of this pair rotating disk (2) end face middle part bipolar magnet (3) is installed, described sensor (5) inside comprises Hall effect or magnetoresistance effect chip (4), and this Hall effect or magnetoresistance effect chip (4) are positioned at top or the below of described bipolar magnet (3).
2. the measurement of engine rotate speed device based on magnetic encoder according to claim 1, it is characterized in that, described sensor (5) comprises the circuit board (6) that is installed in its plastic casing inside, be equipped with on this circuit board (6) be used to the Hall effect that receives described bipolar magnet (3) field signal or magnetoresistance effect chip (4), this Hall effect or magnetoresistance effect chip (4) are connected with the filtering circuit that is welded on the described circuit board (6), described sensor (5) also is provided with for the contact pin (7) that is connected by wire harness with control unit of engine, one end of this contact pin (7) is welded on the circuit board (6), and the other end exposes the outside surface of sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220409188 CN202837318U (en) | 2012-08-17 | 2012-08-17 | Engine rotating speed measuring device based on magnetic encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220409188 CN202837318U (en) | 2012-08-17 | 2012-08-17 | Engine rotating speed measuring device based on magnetic encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202837318U true CN202837318U (en) | 2013-03-27 |
Family
ID=47948997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220409188 Expired - Fee Related CN202837318U (en) | 2012-08-17 | 2012-08-17 | Engine rotating speed measuring device based on magnetic encoder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202837318U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3093625A3 (en) * | 2015-05-13 | 2016-12-21 | Robert Bosch Gmbh | Gear module, angle sensor and vehicle |
| CN108414785A (en) * | 2018-05-03 | 2018-08-17 | 苏州微测电子有限公司 | Sensor and detection device |
| CN113219199A (en) * | 2021-05-07 | 2021-08-06 | 武昌理工学院 | Method for detecting rotation of shaft lever in lower radar cavity |
| CN113659879A (en) * | 2021-07-26 | 2021-11-16 | 极限人工智能有限公司 | Motor closed-loop control device and method for surgical robot |
-
2012
- 2012-08-17 CN CN 201220409188 patent/CN202837318U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3093625A3 (en) * | 2015-05-13 | 2016-12-21 | Robert Bosch Gmbh | Gear module, angle sensor and vehicle |
| CN108414785A (en) * | 2018-05-03 | 2018-08-17 | 苏州微测电子有限公司 | Sensor and detection device |
| CN113219199A (en) * | 2021-05-07 | 2021-08-06 | 武昌理工学院 | Method for detecting rotation of shaft lever in lower radar cavity |
| CN113659879A (en) * | 2021-07-26 | 2021-11-16 | 极限人工智能有限公司 | Motor closed-loop control device and method for surgical robot |
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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 |
Granted publication date: 20130327 Termination date: 20140817 |
|
| EXPY | Termination of patent right or utility model |