CN201364164Y - Adjustable engine rotating speed signal processing circuit - Google Patents
Adjustable engine rotating speed signal processing circuit Download PDFInfo
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- CN201364164Y CN201364164Y CNU2008201800606U CN200820180060U CN201364164Y CN 201364164 Y CN201364164 Y CN 201364164Y CN U2008201800606 U CNU2008201800606 U CN U2008201800606U CN 200820180060 U CN200820180060 U CN 200820180060U CN 201364164 Y CN201364164 Y CN 201364164Y
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- resistance
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- rotating speed
- negative input
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Abstract
The utility model relates to an adjustable engine rotating speed signal processing circuit, which can be used as a rotating speed signal processing circuit of an electrical control engine, achieves the shaping, protecting and other functions on a rotating speed input signal of the electrical control engine, and belongs to a hardware system of the electrical control engine control system. The rotating speed signal processing circuit comprises a positive input end circuit, a negative input end circuit, an output end circuit and a comparator. When the rotating speed signal processing circuit works, the engine control system can adjust a control signal of a triode in the negative input end circuit according to the rotating speed of the engine to ensure that the triode is in conducting or cut-off state, further change the input voltage of a negative input end of the comparator and correspondingly change an inversion threshold of signal hopping. By changing the inversion threshold of the processing circuit, the inverting phase of an output signal can be changed and the phase errors of two conditions can be reduced. The utility model has the advantages of adapting to magnetoelectric sensors and Hall sensors, and having stronger anti-jamming capability and higher phase processing precision.
Description
Technical field
Adjustable engine rotational speed signal treatment circuit can be used as the tach signal treatment circuit of electric-control motor, realizes the functions such as shaping, protection to electric-control motor rotating speed input signal, belongs to the hardware system in the electric-control motor control system.
Background technology
Generally, engine rotational speed signal comprises crankshaft signal and camshaft signal two parts.According to the relevant information that crankshaft signal and camshaft signal provide, multiple functions such as engine control system can realize that the engine phase place is judged, fuel injection calculation of parameter and the generation of fuel Injection Control signal.These functions that realized based on tach signal are requisite ingredients in the engine control system, so engine rotational speed signal also is regarded as one of most important input signal of electric-control motor.
The normal revolution sensor comprises two types of magneto-electric, Hall-types.The principle of work of magnetoelectric sensor is an electromagnetic induction, utilize the breach on the engine signal dish that rotates constantly to change magnetic gap exactly, make and change by the magnetic flux of inductive coil winding is also corresponding, thereby produce the perceptual electromotive force of the near sinusoidal ripple of alternation at the coil two ends, so its output signal is simulating signal, and amplitude is relevant with engine speed, and rotating speed is high more, and signal amplitude is big more.Hall element is then realized according to Hall effect, needs the power supply power supply, and its output signal is a digital signal, is generally square-wave signal.Because the accessible tach signal of electric-control motor control system must be a digital signal, so often adopt certain treatment circuit that the simulating signal of sensor output is converted into the accessible digital signal of engine control system.For guaranteeing the versatility of treatment circuit, the tach signal treatment circuit often requires to handle magneto-electric and two kinds of sensor signals of Hall-type.
Conventional engines tach signal treatment circuit can be divided into singly limits two kinds of comparer treatment circuit and hysteresis loop comparator treatment circuits.
Positive input, reverse input end and the output terminal of comparer are isolated mutually in single limit comparer treatment circuit, and the amplifier of device is in open loop situations as a comparison.The saltus step threshold voltage of its input signal has only one, and promptly when applied signal voltage was higher or lower than this unique threshold voltage, corresponding output signal was respectively high and low level.The shortcoming of such signal processing circuit maximum is exactly that antijamming capability is low, and when input signal had disturbance near the saltus step threshold value, comparator output signal was easily by the trigger pip saltus step of mistake.
Input with comparer in the hysteresis loop comparator treatment circuit links to each other with output terminal, thereby has constituted feedback circuit.This makes the input-output curve of this treatment circuit have hysteretic characteristic, even output is by the input signal saltus step threshold value V of height to low saltus step
T1With make the input signal saltus step threshold value V that exports saltus step from low to high
T2No longer identical.The related content of hysteresis loop comparator treatment circuit can be with reference to patent " a kind of engine rotational speed signal treatment circuit " (application number: 200520023047.6).Compare single limit comparer treatment circuit, owing to have certain interval between two saltus step threshold values of hysteresis loop comparator treatment circuit, thus make it have the better resisting interference ability, but the shortcoming that the hysteresis loop comparator treatment circuit still haves much room for improvement.Its shortcoming is the phase error between high rotating speed and the slow-speed of revolution when mainly showing Analog signals.Explain the shortcoming of hysteresis loop comparator treatment circuit in detail below in conjunction with accompanying drawing.
See Fig. 1, be depicted as the course of work of the simulating signal of hysteresis formula comparer treatment circuit when handling the high rotating speed and the slow-speed of revolution, φ is the engine phase place of a tach signal cycle correspondence among the figure.When the tach signal under the employing hysteresis formula high rotating speed of comparer processing circuit processes and these two kinds of different situations of the slow-speed of revolution, owing to adopted identical turn threshold V
T1, V
T2So the upset level under two kinds of situations all is identical.But as previously mentioned, the simulating signal amplitude of magnetoelectric tachometric transducer output is subjected to the influence of engine speed, so the input signal of treatment circuit during high speed, just the tach signal amplitude is higher, and the tach signal amplitude during low speed is then lower.This has just caused under two kinds of situations, and the tach signal level is identical during processing signals treatment circuit output signal upset just, but the corresponding phase difference.When processing signals is overturn from low to high, the corresponding phase the when corresponding phase during high rotating speed will be early than the slow-speed of revolution, both errors are Δ φ
1Processing signals by height when the low upset, the corresponding phase the when corresponding phase during high rotating speed will be later than the slow-speed of revolution, both errors are Δ φ
2Because the electric-control motor control system serves as that the engine phase place is judged on the basis with the upset of processing signals constantly, so when the high rotating speed and the slow-speed of revolution, the phase error af that the hysteresis loop comparator treatment circuit causes
1With Δ φ
2With the error that causes control system that the engine phase place is judged, thereby influence the engine control effect.
Summary of the invention
The objective of the invention is on the basis of hysteresis formula comparer treatment circuit, propose the higher tach signal treatment circuit of a kind of processing accuracy, the phase error of tach signal when this tach signal treatment circuit can reduce to handle the high rotating speed and the slow-speed of revolution.
Adjustable engine rotational speed signal treatment circuit comprises positive input circuit, negative input circuit, circuit of output terminal and four parts of comparer.
Comparer is an independent comparer.
The positive input circuit is made up of two resistance, a diode and an electric capacity.Wherein, two resistance series connection, one is terminated at power supply, and one is terminated at the input of comparer forward.Tach signal inserts as the continuous point of input signal from resistance in series.Electric capacity is in parallel with diode, is connected between the input of power supply ground and comparer forward, plays the effect of protection and filtering.Diode cathode connects power supply ground, and diode cathode connects the comparer positive input.
The negative input circuit is made up of three resistance, an electric capacity and a triode.Wherein, three resistance series connection.First resistance one termination power, second resistance of another termination and comparer negative input.Second first resistance of resistance one termination and comparer negative input, another termination transistor collector and the 3rd resistance.The 3rd resistance one termination transistor collector and second resistance, other end ground connection.Electric capacity is connected between power supply ground and the input of comparer negative sense.Transistor collector connects the tie point of second resistance and the 3rd resistance, and emitter connects power supply ground, and base stage connects control signal.Control signal is controlled by engine control system, is used to dispose the reference voltage of comparer negative input.
Circuit of output terminal comprises two resistance and an electric capacity.Wherein, electric capacity is connected between comparator input terminal and the power supply ground, and a resistance is connected between comparator output terminal and the positive input, another resistance one termination comparator output terminal, another termination output signal.
Beneficial effect of the present invention is: can adapt to two kinds of sensors of magneto-electric and Hall-type, have stronger antijamming capability and higher Phase Processing precision.
Description of drawings
Fig. 1 is the hysteresis formula comparer treatment circuit course of work.
Fig. 2 is an adjustable engine rotational speed signal treatment circuit schematic diagram.
Fig. 3 is an adjustable engine rotational speed signal treatment circuit work engineering.
Embodiment
Describe the particular content of the present invention and the course of work in detail below in conjunction with embodiment and accompanying drawing.
See Fig. 1, adjustable tach signal treatment circuit comprises positive input circuit, negative input circuit, circuit of output terminal and four parts of comparer.Wherein, U
1Be comparer.The positive input circuit comprises resistance R
1And R
2, diode D
1And capacitor C
1R
1And R
2Be connected in series in power supply and U
1Between the forward end, input signal is connected to R
1And R
2Between.D
1Forward termination power ground, negative sense termination U
1Forward end, C
1Be connected to power supply ground and U
1Between the forward end.The negative input circuit comprises resistance R
4, R
5And R
6, triode T
1And capacitor C
2R
4, R
5And R
6Series connection back one termination power, another termination power ground.R
4With R
5Tie point meet U
1Negative input.C
2Be connected to power supply ground and U
1Between the negative end.T
1Collector meets R
5And R
6Tie point, emitter connects power supply ground, base stage connects control signal.Circuit of output terminal comprises resistance R
3And R
7, capacitor C
3R
3One termination U
1Positive input, another termination U
1Output terminal.R
7One termination U
1Output terminal, the other end is as output signal.
During this circuit working, should be configured according to the type of input signal.When input signal is digital signal, should not use resistance R
3With triode T
1, all the other devices normally use.At this moment, comparer U
1Do not form backfeed loop between input end and the output terminal, the turn threshold of comparer is unique, by resistance R
4, R
5And R
6Resistance is determined.When the tach signal of input was high level, the comparer forward end was a high level also, and is higher than the turn threshold of negative end, so comparer is output as height, corresponding output signal also is high; When the tach signal of input when being low level, the comparer forward end be a low level also, and is lower than the turn threshold of negative end, so that comparer is output as is low, the output signal of correspondence also is low.Processing to input high level, two kinds of situations of low level has realized the processing of digital input signal.
When input signal is simulating signal, should not use resistance R
1, all the other devices normally use.At this moment, engine control system can be adjusted the control signal of treatment circuit according to engine speed, makes triode T
1Be in conducting and end two states, and then changed comparer U
1The input voltage of negative input, and changed turn threshold accordingly.The change of treatment circuit turn threshold can change the upset phase place of output signal by to the high rotating speed and the slow-speed of revolution time, reduce the phase error under two kinds of situations.The concrete adjustable engine rotational speed signal treatment circuit course of work as shown in Figure 3.
Among Fig. 3, when engine speed was low, the processing circuit controls signal was high, triode T
1Conducting, resistance R
6By short circuit, comparer U
1The voltage U of negative input
- LBy resistance R
4And R
5Dividing potential drop decision, the turn threshold during the high and low level of corresponding output signal is respectively V
T1 LAnd V
T2 L, the result who exports processing signals accordingly as shown in FIG..When engine speed was higher, the processing circuit controls signal was low, triode T
1Turn-off comparer U
1The voltage U of negative input
- HBy resistance R
5, R
6After the series connection again and R
4The dividing potential drop decision.At this moment, the voltage U of negative input
- HNegative input voltage U when being higher than the slow-speed of revolution under the triode conducting state
- L, and the turn threshold V during the high and low level of corresponding output signal
T1 HAnd V
T2 HTurn threshold V when also being higher than the slow-speed of revolution respectively under the triode conducting state
T1 LAnd V
T2 LDuring high rotating speed in the practical work process of treatment circuit, when the processing signals of output when low, utilize higher turn threshold V
T2 HThe upset that can delay processing signals constantly, thereby consistent upset phase place when obtaining with the slow-speed of revolution.Corresponding, when the processing signals of output when being high, utilize higher turn threshold V
T1 HThe upset of processing signals is shifted to an earlier date constantly, in the time of equally also obtaining with the slow-speed of revolution-the upset phase place that causes.As seen, utilize control signal can change the voltage and the turn threshold of comparer negative input, thereby the upset of processing signals all have identical engine phase place constantly when making high rotating speed, the slow-speed of revolution to the control of triode conducting state.
Claims (2)
1, adjustable engine rotational speed signal treatment circuit comprises positive input circuit, negative input circuit, circuit of output terminal and four parts of comparer; It is characterized in that: comprised three resistance and a triode in the negative input circuit; Wherein, three resistance series connection; First resistance one termination power, second resistance of another termination and comparer negative input; Second first resistance of resistance one termination and comparer negative input, another termination transistor collector and the 3rd resistance; The 3rd resistance one termination transistor collector and second resistance, other end ground connection; Transistor collector connects the tie point of second resistance and the 3rd resistance, and emitter connects power supply ground, and base stage connects control signal.
2, adjustable engine rotational speed signal treatment circuit according to claim 1, it is characterized in that: the triode in the negative input circuit is controlled, the control signal of triode makes triode be in conducting or cut-off state, can change the branch pressure condition of resistance, and then changed the input voltage of comparer negative input, adjusted the turn threshold of signal saltus step accordingly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201800606U CN201364164Y (en) | 2008-11-27 | 2008-11-27 | Adjustable engine rotating speed signal processing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201800606U CN201364164Y (en) | 2008-11-27 | 2008-11-27 | Adjustable engine rotating speed signal processing circuit |
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| Publication Number | Publication Date |
|---|---|
| CN201364164Y true CN201364164Y (en) | 2009-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201800606U Expired - Lifetime CN201364164Y (en) | 2008-11-27 | 2008-11-27 | Adjustable engine rotating speed signal processing circuit |
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| Country | Link |
|---|---|
| CN (1) | CN201364164Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106845133A (en) * | 2017-02-16 | 2017-06-13 | 成都天衡电科科技有限公司 | A kind of computational methods and computing system of phase bit flipping number |
| CN112213513A (en) * | 2020-09-23 | 2021-01-12 | 陕西法士特齿轮有限责任公司 | Transmission rotating speed measuring device with specific filtering function and measuring distance adjusting function |
-
2008
- 2008-11-27 CN CNU2008201800606U patent/CN201364164Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106845133A (en) * | 2017-02-16 | 2017-06-13 | 成都天衡电科科技有限公司 | A kind of computational methods and computing system of phase bit flipping number |
| CN106845133B (en) * | 2017-02-16 | 2019-04-05 | 成都天衡电科科技有限公司 | A kind of calculation method and computing system of phase bit flipping number |
| CN112213513A (en) * | 2020-09-23 | 2021-01-12 | 陕西法士特齿轮有限责任公司 | Transmission rotating speed measuring device with specific filtering function and measuring distance adjusting function |
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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: Changzhou Ectek Automotive Electronic Systems Co., Ltd. Assignor: Beijing Yikong Lingbo Automobile Electronic Technology Co., Ltd. Contract record no.: 2011320000629 Denomination of utility model: Adjustable engine rotating speed signal processing circuit Granted publication date: 20091216 License type: Exclusive License Record date: 20110422 |
|
| DD01 | Delivery of document by public notice |
Addressee: Beijing Yikong Lingbo Automobile Electronic Technology Co., Ltd. Document name: Notification to Pay the Fees |
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| DD01 | Delivery of document by public notice |
Addressee: Beijing Yikong Lingbo Automobile Electronic Technology Co., Ltd. Document name: Notification of Termination of Patent Right |
|
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 100098 room 4, building 48, No. 111, Zhichun Road, Beijing, Haidian District Patentee after: Beijing Yikong Lingbo Automobile Electronic Technology Co., Ltd. Address before: 100083 B, block 815A, 8 East Zhongguancun Road, Beijing, Haidian District Patentee before: Beijing Yikong Lingbo Automobile Electronic Technology Co., Ltd. |
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| DD01 | Delivery of document by public notice |
Addressee: Zhang Kexun Document name: Notification to Pay the Fees |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091216 |
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| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Beijing Yikong Lingbo Automobile Electronic Technology Co., Ltd. Document name: Notification of Expiration of Patent Right Duration |