CN107561305A - Rotation speed signal processing circuit of engine and speed probe type detection method - Google Patents
Rotation speed signal processing circuit of engine and speed probe type detection method Download PDFInfo
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- CN107561305A CN107561305A CN201710758082.XA CN201710758082A CN107561305A CN 107561305 A CN107561305 A CN 107561305A CN 201710758082 A CN201710758082 A CN 201710758082A CN 107561305 A CN107561305 A CN 107561305A
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Abstract
The invention discloses a kind of rotation speed signal processing circuit of engine and speed probe type detection method, rotation speed signal processing circuit of engine to include：Sensor detection circuit, microcontroller, magnetoelectric tachometric signal processing circuit and Hall-type tach signal process circuit, sensor detection circuit receives the engine speed sensor signal that outer speed probe is sent, sensor detection circuit sends engine speed sensor signal to microcontroller the type for identifying outer speed probe, and the gating of magnetoelectric tachometric signal processing circuit or Hall-type tach signal process circuit is controlled, realize the processing of the engine speed sensor signal.By rotation speed signal processing circuit of engine provided by the invention can automatic identification external sensor type, and switch to corresponding tach signal process circuit and handled, and solve the problems, such as to need more changer controller when controller matches dissimilar sensor.
Description
Technical field
The present invention relates to electric-control motor control technology field, more particularly to a kind of rotation speed signal processing circuit of engine
And speed probe type detection method.
Background technology
Electric-control motor control system obtains the related letter such as engine speed, phase position according to bent axle, camshaft signal
Breath, and the control parameters such as fuel injection amount, fuel oil injection advance angle are calculated, so as to control drive circuit of injector etc. to perform
Device drive circuit realizes the control to engine, engine is run under optimum condition.Conventional automobile-used speed probe bag
Include Hall-type, magneto-electric two types.Wherein, hall-effect speed sensor utilizes Hall effect induced signal disk breach, needs outer
Power supply is connect, output signal is data signal, i.e., only high and low two states；Magnetoelectric tachometric transducer senses that signal panels lack
Flux change at mouthful, so as to export the analog signal of approximate sine wave, and the amplitude of output signal significantly becomes with rotating speed
Change.The treatable signal of engine electric-controlled system microprocessor must be data signal, so specific rotating speed must be used to believe
Number process circuit.
For traditional engine controller when matching different type speed probe, controller can not carry out signal transacting,
A kind of controller can only handle a kind of signals of rotational speed sensor, it is necessary to be equipped with two controllers, when external sensor type occurs
, it is necessary to which more changer controller, brings using upper inconvenience, and add cost during change；In addition, identical platform controller reserved two
Kind of tach signal process circuit, Selective Soldering is carried out according to actual external sensor match-type during use, passes through controller
Switching when version is to realize that different sensors match.
Traditional scheme needs two controller or two hardware versions in identical platform installation controller, so as to improve
Controller cost, and to practical application bring inconvenience.
The content of the invention
It is an object of the invention to propose a kind of rotation speed signal processing circuit of engine and speed probe type detection side
Method, with realize can automatic identification outer speed probe type, and automatically switch into corresponding tach signal processing electricity
Road carries out signal transacting.
To reach above-mentioned purpose, the invention provides following technical scheme：
A kind of rotation speed signal processing circuit of engine, including：Sensor detection circuit, microcontroller, magnetoelectric tachometric letter
Number process circuit and Hall-type tach signal process circuit, wherein：
The input of the sensor detection circuit is connected with outer speed probe；
First output end of the sensor detection circuit is connected with the microcontroller；
The input with the magnetoelectric tachometric signal processing circuit respectively of second output end of the sensor detection circuit
End is connected with the input of the Hall-type tach signal process circuit；
The output of the output end of the magnetoelectric tachometric signal processing circuit and the Hall-type tach signal process circuit
End is connected with the microcontroller respectively；
The sensor detection circuit receives the engine speed sensor that the outer speed probe is sent
Signal, the sensor detection circuit send the engine speed sensor signal described outer to microcontroller identification
The type of portion's engine speed sensor, and control the magnetoelectric tachometric signal processing circuit or the Hall-type tach signal
The gating of process circuit, realize the processing of the engine speed sensor signal.
Preferably, the sensor detection circuit includes：Sensor 5V power supply circuits, first switch, second switch, the 3rd
Switch and resistance sampling circuit, wherein：
The sensor 5V power supply circuits are connected with one end of the first switch, the other end of the first switch and institute
The one end for stating resistance sampling circuit is connected；
The sensor 5V power supply circuits are connected with one end of the described 3rd switch, the other end of the 3rd switch and institute
Outer speed probe is stated to be connected；
The microcontroller is connected with the control terminal of the first switch；
First signal output part phase of the other end of the resistance sampling circuit and the outer speed probe
Even；First signal output part is connected with the microcontroller, and with the magnetoelectric tachometric signal processing circuit respectively and
The Hall-type tach signal process circuit is connected；
The control terminal of the second switch is connected with the microcontroller, one end of the second switch and the outside hair
The secondary signal output end of motivation speed probe is connected, the secondary signal output end and the magnetoelectric tachometric signal transacting
Circuit is connected, the other end ground connection of the second switch.
Preferably, the resistance sampling circuit includes the sampling resistor of fixed resistance value.
Preferably, the microcontroller is single-chip microcomputer.
A kind of speed probe type detection method, applied to rotation speed signal processing circuit of engine, the engine turns
Fast signal processing circuit includes：Sensor detection circuit, microcontroller, magnetoelectric tachometric signal processing circuit and Hall-type turn
Fast signal processing circuit, wherein, the sensor detection circuit includes：Sensor 5V power supply circuits, first switch, second open
Close, the 3rd switch and resistance sampling circuit, this method include：
The sensor detection circuit receives the engine speed sensor that the outer speed probe is sent
Signal；
The engine speed sensor signal is sent to the microcontroller and identifies institute by the sensor detection circuit
State the type of outer speed probe；
Magnetoelectric tachometric signal processing circuit described in the microprocessor control or Hall-type tach signal processing electricity
The gating on road.
Preferably, the sensor detection circuit sends the engine speed sensor signal to the microcontroller
The type of the outer speed probe is identified, including：
First switch described in the microprocessor control and second switch conducting；
The microcontroller gathers the voltage of first signal output part, according to the sampling resistor meter of resistance sampling circuit
Calculate the equivalent resistance of the outer speed probe；
The type of the outer speed probe is determined according to the equivalent resistance.
Preferably, magnetoelectric tachometric signal processing circuit described in the microprocessor control or the Hall-type tach signal
The gating of process circuit, including：
According to the type selecting subsequent process circuit of the outer speed probe；
If the outer speed probe is hall sensor, the second switch and the described 3rd are controlled
Switch conduction, the first switch are disconnected, and signal transacting is carried out using the Hall-type tach signal process circuit；
If the outer speed probe is magnetoelectric sensor, disconnects the first switch, described second open
Close and the described 3rd switchs, signal transacting is carried out using the magnetoelectric tachometric signal processing circuit.
Understand that compared with prior art, the invention discloses a kind of engine rotational speed signal via above-mentioned technical scheme
Process circuit and speed probe type detection method, rotation speed signal processing circuit of engine include：It is sensor detection circuit, micro-
Controller, magnetoelectric tachometric signal processing circuit and Hall-type tach signal process circuit, sensor detection circuit receive outer
The engine speed sensor signal that portion engine speed sensor is sent, sensor detection circuit is by engine speed sensor
Signal is sent to the type of microcontroller identification outer speed probe, and controls magnetoelectric tachometric signal processing circuit
Or the gating of Hall-type tach signal process circuit, realize the processing of the engine speed sensor signal.Pass through the present invention
The rotation speed signal processing circuit of engine of offer can automatic identification external sensor type, and switch to corresponding tach signal
Process circuit is handled, and solves the problems, such as to need more changer controller when controller matches dissimilar sensor.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of rotation speed signal processing circuit of engine schematic diagram provided in an embodiment of the present invention；
Fig. 2 is a kind of specific schematic diagram of rotation speed signal processing circuit of engine provided in an embodiment of the present invention；
Fig. 3 is a kind of speed probe type detection method flow schematic diagram of body of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Accompanying drawing 1 is referred to, Fig. 1 is a kind of rotation speed signal processing circuit of engine schematic diagram provided in an embodiment of the present invention.
As shown in figure 1, the invention discloses a kind of rotation speed signal processing circuit of engine, the circuit specifically includes：Sensor detection electricity
Road 1, microcontroller 2, magnetoelectric tachometric signal processing circuit 3 and Hall-type tach signal process circuit 4, wherein：
The input of sensor detection circuit 1 is connected with outer speed probe；The of sensor detection circuit 1
One output end is connected with microcontroller 2；Second output end of sensor detection circuit 1 is electric with magnetoelectric tachometric signal transacting respectively
The input on road 3 is connected with the input of Hall-type tach signal process circuit 4；Magnetoelectric tachometric signal processing circuit 3 it is defeated
The output end for going out end and Hall-type tach signal process circuit 4 is connected with microcontroller 2 respectively.
Specifically, sensor detection circuit 1 receives the engine speed sensor that outer speed probe is sent
Engine speed sensor signal is sent to microcontroller 2 and identifies that outer rotating speed passes by signal, sensor detection circuit 1
The type of sensor, and the gating of magnetoelectric tachometric signal processing circuit 3 or Hall-type tach signal process circuit 4 is controlled, realize
The processing of engine speed sensor signal.
As shown in figure 1, engine speed sensor signal first passes through sensor detection circuit detection when entering ECU, and will
Data feedback microcontroller, microcontroller identification current external engine speed sensor type, and control follow-up signal to handle
The gating of circuit, realize the processing of engine rotational speed signal.
The invention discloses a kind of rotation speed signal processing circuit of engine, including：Sensor detection circuit, microcontroller,
Magnetoelectric tachometric signal processing circuit and Hall-type tach signal process circuit, sensor detection circuit receive outer
The engine speed sensor signal that speed probe is sent, sensor detection circuit send engine speed sensor signal
To the type of microcontroller identification outer speed probe, and control magnetoelectric tachometric signal processing circuit or Hall-type
The gating of tach signal process circuit, realize the processing of the engine speed sensor signal.Pass through hair provided by the invention
Motivation tach signal process circuit can automatic identification external sensor type, and switch to corresponding tach signal process circuit
Handled, and solve the problems, such as to need more changer controller when controller matches dissimilar sensor.
Accompanying drawing 2 is referred to, Fig. 2 is that a kind of the specific of rotation speed signal processing circuit of engine provided in an embodiment of the present invention is shown
It is intended to.As shown in Fig. 2 sensor detection circuit 1 includes：Sensor 5V power supply circuits 5, first switch 6, second switch the 7, the 3rd
Switch 8 and resistance sampling circuit 9, wherein：
Sensor 5V power supply circuits 5 are connected with one end of first switch 6, the other end and the resistance sampling electricity of first switch 6
The one end on road 9 is connected；Sensor 5V power supply circuits 5 are connected with one end of the 3rd switch 8, the other end and the outside of the 3rd switch 8
Engine speed sensor is connected；Microcontroller 2 is connected with the control terminal of first switch 6；The other end of resistance sampling circuit 9 with
First signal output part of outer speed probe is connected；First signal output part is connected with microcontroller 2, and with dividing
Other magnetoelectric tachometric signal processing circuit 3 is connected with Hall-type tach signal process circuit 4；The control terminal of second switch 7 with it is micro-
Controller 2 is connected, and one end of second switch 7 is connected with the secondary signal output end of outer speed probe, the second letter
Number output end is connected with magnetoelectric tachometric signal processing circuit 3, the other end ground connection of second switch 7.
Preferably, resistance sampling circuit includes the sampling resistor of fixed resistance value.
Preferably, microcontroller is single-chip microcomputer.
Sensor detection circuit principle：Between two signal wires of magnetoelectric tachometric transducer equiva lent impedance one kilohm with
It is interior；For hall-effect speed sensor in the case where no 5V powers, the impedance approaching infinity between signal wire and ground is big.Actual use
When ECU one resistance sampling circuit of indoor design, ECU it is upper electricity after detect external sensor equivalent resistance, it is big according to equivalent resistance
It is small to can determine whether external sensor type.
Tach signal process circuit job step：
1st, after the upper electricity of ECU, single-chip microcomputer controlling switch 1, the conducting of switch 2；
2nd, the voltage on single-chip microcomputer collection signal 1, calculates external sensor equivalent resistance, tells external sensor class
Type；
3rd, according to external sensor type selecting subsequent process circuit, if external sensor is Hall-type, switch 2,3 is led
Logical, switch 1 is disconnected, and signal transacting is carried out using Hall-type process circuit；If external sensor is magneto-electric, switch 1,2,3 is disconnected
Open, signal transacting is carried out using magneto-electric process circuit.
The invention discloses a kind of rotation speed signal processing circuit of engine, passes through engine rotational speed signal provided by the invention
Process circuit can automatic identification external sensor type, and switch to corresponding tach signal process circuit and handled, and
Solve the problems, such as to need more changer controller when controller matches dissimilar sensor.
Accompanying drawing 3 is referred to, Fig. 3 is that a kind of speed probe type detection method flow of body of the embodiment of the present invention is illustrated
Figure.As shown in figure 3, the invention discloses a kind of speed probe type detection method, it is applied at engine rotational speed signal
Circuit is managed, the rotation speed signal processing circuit of engine includes：Sensor detection circuit, microcontroller, at magnetoelectric tachometric signal
Circuit and Hall-type tach signal process circuit are managed, wherein, sensor detection circuit includes：Sensor 5V power supply circuits,
One switch, second switch, the 3rd switch and resistance sampling circuit, this method specifically comprise the following steps：
S301, sensor detection circuit receive the engine speed sensor letter that outer speed probe is sent
Number.
S302, sensor detection circuit, which send engine speed sensor signal to microcontroller, identifies outer
The type of speed probe.
, it is necessary to which explanation, sensor detection circuit send engine speed sensor signal to micro- in the present embodiment
Controller identifies the type of outer speed probe, including：
Microprocessor control first switch and second switch conducting；
Microcontroller gathers the voltage of the first signal output part, and outside is calculated according to the sampling resistor of resistance sampling circuit
The equivalent resistance of engine speed sensor；
The type of outer speed probe is determined according to equivalent resistance.
S303, microprocessor control magnetoelectric tachometric signal processing circuit or Hall-type tach signal process circuit choosing
It is logical.
, it is necessary to which explanation, microprocessor control magnetoelectric tachometric signal processing circuit or Hall-type turn in the present embodiment
The gating of fast signal processing circuit, including：
According to the type selecting subsequent process circuit of outer speed probe；
If outer speed probe is hall sensor, second switch and the 3rd switch is controlled to lead
Logical, first switch is disconnected, and signal transacting is carried out using Hall-type tach signal process circuit；
If outer speed probe is magnetoelectric sensor, disconnection first switch, second switch and the 3rd open
Close, signal transacting is carried out using magnetoelectric tachometric signal processing circuit.
The invention discloses a kind of speed probe type detection method, and it is applied to engine rotational speed signal processing electricity
Road, the rotation speed signal processing circuit of engine include：Sensor detection circuit, microcontroller, magnetoelectric tachometric signal transacting
Circuit and Hall-type tach signal process circuit, wherein, the sensor detection circuit includes：Sensor 5V power supply circuits,
First switch, second switch, third switch and resistance sampling circuit, handled by engine rotational speed signal provided by the invention
Circuit can automatic identification external sensor type, and switch to corresponding tach signal process circuit and handled, and solve
The problem of needing more changer controller during controller matching dissimilar sensor.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply and deposited between these entities or operation
In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Nonexcludability includes, so that article or equipment including a series of elements not only include those key elements, but also wraps
Include the other element being not expressly set out, or also include for this article or the intrinsic key element of equipment.Do not having more
In the case of more limitations, the key element that is limited by sentence "including a ...", it is not excluded that in the article including above-mentioned key element or
Other identical element in person's equipment also be present.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (7)
- A kind of 1. rotation speed signal processing circuit of engine, it is characterised in that including：Sensor detection circuit, microcontroller, magnetoelectricity Formula tach signal process circuit and Hall-type tach signal process circuit, wherein：The input of the sensor detection circuit is connected with outer speed probe；First output end of the sensor detection circuit is connected with the microcontroller；Second output end of the sensor detection circuit respectively with the input of the magnetoelectric tachometric signal processing circuit and The input of the Hall-type tach signal process circuit is connected；The output end of the magnetoelectric tachometric signal processing circuit and the output end of the Hall-type tach signal process circuit point It is not connected with the microcontroller；The sensor detection circuit receives the engine speed sensor signal that the outer speed probe is sent, The sensor detection circuit sends the engine speed sensor signal to the microcontroller identification outside hair The type of motivation speed probe, and control the magnetoelectric tachometric signal processing circuit or the Hall-type tach signal to handle The gating of circuit, realize the processing of the engine speed sensor signal.
- 2. rotation speed signal processing circuit of engine according to claim 1, it is characterised in that the sensor detection circuit Including：Sensor 5V power supply circuits, first switch, second switch, third switch and resistance sampling circuit, wherein：The sensor 5V power supply circuits are connected with one end of the first switch, the other end of the first switch and the electricity One end of resistance sample circuit is connected；The sensor 5V power supply circuits are connected with one end of the described 3rd switch, the other end of the 3rd switch with it is described outer Portion's engine speed sensor is connected；The microcontroller is connected with the control terminal of the first switch；The other end of the resistance sampling circuit is connected with the first signal output part of the outer speed probe；Institute The first signal output part is stated with the microcontroller to be connected, and with the magnetoelectric tachometric signal processing circuit respectively and it is described suddenly You are connected at formula tach signal process circuit；The control terminal of the second switch is connected with the microcontroller, one end of the second switch and the outer The secondary signal output end of speed probe is connected, the secondary signal output end and the magnetoelectric tachometric signal processing circuit It is connected, the other end ground connection of the second switch.
- 3. rotation speed signal processing circuit of engine according to claim 2, it is characterised in that the resistance sampling circuit bag Include the sampling resistor of fixed resistance value.
- 4. rotation speed signal processing circuit of engine according to claim 1, it is characterised in that the microcontroller is monolithic Machine.
- A kind of 5. speed probe type detection method, it is characterised in that described applied to rotation speed signal processing circuit of engine Rotation speed signal processing circuit of engine includes：Sensor detection circuit, microcontroller, magnetoelectric tachometric signal processing circuit and Hall-type tach signal process circuit, wherein, the sensor detection circuit includes：Sensor 5V power supply circuits, first switch, Second switch, the 3rd switch and resistance sampling circuit, this method include：The sensor detection circuit receives the engine speed sensor signal that the outer speed probe is sent；The sensor detection circuit sends the engine speed sensor signal described outer to microcontroller identification The type of portion's engine speed sensor；Magnetoelectric tachometric signal processing circuit described in the microprocessor control or the Hall-type tach signal process circuit Gating.
- 6. speed probe type detection method according to claim 5, it is characterised in that the sensor detection circuit The engine speed sensor signal is sent to the microcontroller to the class for identifying the outer speed probe Type, including：First switch described in the microprocessor control and second switch conducting；The microcontroller gathers the voltage of first signal output part, is calculated according to the sampling resistor of resistance sampling circuit The equivalent resistance of the outer speed probe；The type of the outer speed probe is determined according to the equivalent resistance.
- 7. speed probe type detection method according to claim 5, it is characterised in that the microprocessor control institute The gating of magnetoelectric tachometric signal processing circuit or the Hall-type tach signal process circuit is stated, including：According to the type selecting subsequent process circuit of the outer speed probe；If the outer speed probe is hall sensor, the second switch and the 3rd switch are controlled Conducting, the first switch are disconnected, and signal transacting is carried out using the Hall-type tach signal process circuit；If the outer speed probe is magnetoelectric sensor, disconnect the first switch, the second switch with And the 3rd switch, signal transacting is carried out using the magnetoelectric tachometric signal processing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710758082.XA CN107561305A (en) | 2017-08-29 | 2017-08-29 | Rotation speed signal processing circuit of engine and speed probe type detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710758082.XA CN107561305A (en) | 2017-08-29 | 2017-08-29 | Rotation speed signal processing circuit of engine and speed probe type detection method |
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| CN201710758082.XA Pending CN107561305A (en) | 2017-08-29 | 2017-08-29 | Rotation speed signal processing circuit of engine and speed probe type detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109212253A (en) * | 2018-10-18 | 2019-01-15 | 潍柴动力股份有限公司 | A kind of sensor signal processing circuit, processing method, engine and vehicle |
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Application publication date: 20180109 |