CN104833815A - Method, apparatus and equipment for measuring rotating speed of engine - Google Patents
Method, apparatus and equipment for measuring rotating speed of engine Download PDFInfo
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- CN104833815A CN104833815A CN201510096583.7A CN201510096583A CN104833815A CN 104833815 A CN104833815 A CN 104833815A CN 201510096583 A CN201510096583 A CN 201510096583A CN 104833815 A CN104833815 A CN 104833815A
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Abstract
The present invention discloses a method, an apparatus and equipment for measuring rotating speed of an engine, wherein the method comprises the steps of: obtaining an exhaust frequency of the engine; obtaining a proportionality coefficient which is corresponding to the number of cylinders of the engine and is used for calculating; and calculating to obtain a rotating speed value of the engine through the exhaust frequency and the proportionality coefficient. The method, apparatus and equipment of the invention solve the problems of tedious configuration and big measuring errors caused by a plurality of generator parameters which are required to be configured when the rotating speed value of the engine is measured through the generator in the prior art.
Description
Technical field
The present invention relates to automotive field, in particular to a kind of measurement of engine rotate speed method, device and equipment.
Background technology
At present, for the engine speed indicator of conventional commercial car test, the signal source of engine speed holds (w end) or cigar lighter mutually for generator.(w end) or cigar lighter is held to obtain engine rotational speed signal mutually by generator, also need to know some generator correlation parameters, such as: the rotating speed getting engine that power generator electrode logarithm, speed ratio conversion ratio (the wheel speed ratio of engine crankshaft and dynamo belt) are just correct, inconvenient during use.Further, due to the impact by dynamo belt (V band) self transmission efficiency, also can cause that comparatively big error is existed to tachometer value during measurement of engine rotate speed.There is above weak point in traditional engine speed sensor of widespread use and tachometer gage.
For in prior art by needing during generator measurement engine speed value to configure multinomial generator parameter, the problem that the configuration caused is loaded down with trivial details, measuring error is large, not yet proposes effective solution at present.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of measurement of engine rotate speed method, device and equipment, to solve by needing during generator measurement engine speed value to configure multinomial generator parameter in prior art, the problem that the configuration caused is loaded down with trivial details, measuring error is large.
To achieve these goals, according to an aspect of the embodiment of the present invention, a kind of measurement of engine rotate speed method is provided.The method comprises: the discharge frequency obtaining engine; Obtain the scale-up factor for calculate corresponding with the number of cylinders of engine; By discharge frequency and scale-up factor, calculate the tachometer value of engine.
To achieve these goals, according to the another aspect of the embodiment of the present invention, provide a kind of engine speed measuring device, this device comprises: the first acquisition module, for obtaining the discharge frequency of engine; Second acquisition module, for obtaining the scale-up factor for calculate corresponding with the number of cylinders of engine; Computing module, for by discharge frequency and scale-up factor, calculates the tachometer value of engine.
To achieve these goals, according to the another aspect of the embodiment of the present invention, provide a kind of measurement of engine rotate speed equipment, this equipment comprises: frequency collection device, is installed in the exhaust pipe of engine, for obtaining the discharge frequency of engine; Processor, sets up communication with frequency collection device and is connected, and for by discharge frequency and the scale-up factor for calculating pre-set, calculates the tachometer value of engine.
According to inventive embodiments, by obtaining the discharge frequency of engine; Obtain the scale-up factor for calculate corresponding with the number of cylinders of engine; By discharge frequency and scale-up factor, calculating the tachometer value of engine, solving by needing during generator measurement engine speed value to configure multinomial generator parameter in prior art, the problem that the configuration caused is loaded down with trivial details, measuring error is large.Achieve the frequency of operation calculation engine rotating speed by obtaining cylinder, computation process is simple, the effect that precision is high.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the measurement of engine rotate speed equipment according to the embodiment of the present invention one;
Fig. 2 is the structural representation according to the preferred measurement of engine rotate speed equipment of the embodiment of the present invention one;
Fig. 3 is the principle schematic of the measurement of engine rotate speed equipment according to the embodiment of the present invention;
Fig. 4 is the structural representation according to the preferred measurement of engine rotate speed equipment of the embodiment of the present invention one;
Fig. 5 is the structural representation according to the preferred measurement of engine rotate speed equipment of the embodiment of the present invention one;
Fig. 6 is the process flow diagram of the measurement of engine rotate speed method according to the embodiment of the present invention two;
Fig. 7 is the structural representation of the engine speed measuring device according to the embodiment of the present invention three;
Fig. 8 is the structural representation according to the preferred engine speed measuring device of the embodiment of the present invention three; And
Fig. 9 is the structural representation according to the preferred engine speed measuring device of the embodiment of the present invention three.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, term " first ", " second " etc. in instructions of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged, in the appropriate case so that embodiments of the invention described herein.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
Embodiment 1
Present embodiments provide a kind of measurement of engine rotate speed equipment, as shown in Figure 1, this system can comprise: frequency collection device 10, processor 12, wherein,
Frequency collection device 10, is installed in the exhaust pipe of engine, for obtaining the discharge frequency of engine.
Processor 12, sets up communication with frequency collection device 10 and is connected, and for by discharge frequency and the scale-up factor for calculating pre-set, calculates the tachometer value of engine.
Concrete, by the frequency collection device arranged at blast duct for vehicle place, gather the frequency of engine exhaust, and obtain the scale-up factor for calculate corresponding with number of cylinders determined by engine operation principle.By processor, the frequency of engine exhaust and scale-up factor are calculated, calculate the tachometer value of engine.
In the middle of practical application, according to engine four-stroke-cycle principle of work, for 4 Cylinder engines, be described.Existing 4 cylinder engines often turn 2 circles, each cylinder completes a four-stroke-cycle process, each cylinder has all carried out the action of an air inlet, compression, burning and exhaust, air inlet, compression, burning and exhaust event are all asynchronous to carry out, namely engine often completes exhaust event 4 times or completes combustion event 4 times, and cylinder can drive engine crankshaft to rotate 2 circles.So the scale-up factor of four cylinder engine rotating speed and discharge frequency, four cylinder engine rotating speed and burning frequency is 1/2.Proving by the same methods, the scale-up factor of 8 Cylinder engines is also 1/2, and the scale-up factor of 3 cylinders, 6 cylinders and twelve-cylinder engine is all 1/3.By the engine combustion collected frequency, discharge frequency and scale-up factor being calculated, generate engine rotational speed signal.This tach signal is that the sensor arranged from gas outlet directly obtains, and does not need to know the correlation parameter of generator and the speed ratio conversion ratio of engine speed and generator speed, only need know that engine cylinder number can use.Further, use said method, also do not affect by dynamo belt self transmission efficiency, improve engine speed precision.
In summary, the invention solves in prior art by needing during generator measurement engine speed value to configure multinomial generator parameter, the problem that the configuration caused is loaded down with trivial details, measuring error is large, achieve the frequency of operation calculation engine rotating speed by obtaining cylinder, computation process is simple, the effect that precision is high.
Preferably, as shown in Figure 2, in the above embodiments of the present application, frequency collection device 10 comprises: hunting gear 101, returning device 102, rheostat 103, resistor 104 and the first signal converter 105.
Wherein, hunting gear 101, for gathering the exhaust event of engine.
Returning device 102, is connected with hunting gear 101, for hunting gear 101 is returned back to initial position.
Rheostat 103, is connected with hunting gear 101, and the resistance of rheostat 103 changes with the motion of hunting gear 101.
Resistor 104, connects with rheostat 103.
First signal converter 105, in parallel with rheostat 103, for the voltage change at rheostat two ends is converted into frequency signal.
Concrete, by arranging hunting gear and rheostat with the gas outlet inside of having started to be connected, obtain the discharge frequency of each engine, wherein, hunting gear is connected with rheostat, and the change of resistance occurs with the swing of hunting gear rheostat.When engine is exhausted work, drive hunting gear swings by the waste gas that engine is discharged, and resistance is also just followed engine exhaust action and changes.
In actual applications, a fixed value resistance and rheostat are carried out series winding and is connected, and the voltage that loading one is constant on two resistance of series connection.By signal converter, the change frequency of the magnitude of voltage be carried on rheostat is converted into the frequency of engine exhaust, to obtain the discharge frequency of engine cylinder.
Certainly, in order to improve the reliability of hunting gear when engine exhaust frequency is very high, on hunting gear, returning device can be installed.Returning device can pass through below hunting gear, to arrange balancing weight, go out to arrange retracing spring in hunting gear rotating shaft, and other can make hunting gear return back to the returning device of original state.
In specific implementation process, as shown in Figure 3,101 is the hunting gear on frequency collection device in discharge directions, is contained in gas outlet; 103 is the rheostat of frequency collection device, and 104 is the pull-up resistor device of frequency collection device, and resistance value is constant.102 is the returning device of frequency collection device, makes hunting gear 101 get back to initial position rapidly after swinging with exhaust; 105 for being converted to the converter of frequency signal by voltage signal, the first signal converter 105 is in parallel with rheostat 103 by wire, detects the change in voltage at two ends.12 is processor, frequency signal after being changed by first signal converter 105 is multiplied by the scale-up factor of engine speed and discharge frequency (such as: 4 cylinder machine coefficients are 1/2,6 cylinder machine coefficients are 1/3), processor 12 is provided with regulating device above, can adjust in use according to real engine cylinder number.14 is tachometer gage, for showing the actual speed of engine.
In figure 3, the frequency collection device 10 of 101,102,103,104 common composition measurement of engine rotate speed equipment, active component can not be contained in gas outlet.When without exhaust, the voltage at rheostat 103 two ends is certain value, when cylinder is vented, in figure, hunting gear 101 is at the move under influence of exhaust, drive the change of rheostat 103 resistance, now, because the change of resistance causes the voltage at rheostat 103 two ends also to change.When not being vented, hunting gear 101 is withdrawn into original position by returning device 102.Above process is repeated during exhaust next time.The change of voltage is by wire transmission in the first signal converter 105, and the first signal converter 105 is peripheral circuit voltage change signal being converted to frequency signal.First signal converter 105 by output speed signal through wire transmission in processor 12, first signal converter 105 is changed rear frequency signal according to the scale-up factor of setting and is adjusted (scale-up factor being namely multiplied by engine speed and discharge frequency) under a proportional relationship by processor 12, be delivered in tachometer gage 14 by wire after adjustment, display actual speed.
Preferably, as shown in Figure 4, in the above embodiments of the present application, frequency collection device 10 comprises: voice operated sensor 106 and secondary signal converter 107.
Wherein, voice operated sensor 106, the intensity of sound that the cylinder for gathering engine sends, the intensity of sound value collected and the sound threshold value preset compare by voice operated sensor 106, when intensity of sound is greater than sound threshold value, send voice signal;
Secondary signal converter 107, sets up communication with voice operated sensor 106 and is connected, for voice signal is converted into frequency signal.
Concrete, by arranging voice operated sensor with the gas outlet inside of having started to be connected, obtaining the burning frequency of each engine.
Wherein, from the principle of work of gasoline engine, each combustion process is all that the fuel-air mixture in spark plug countercylinder is lighted, the small-scale blast of initiation.By the collection of voice operated sensor countercylinder internal explosion sound, thus realize the collection to engine combustion frequency.
Preferably, as shown in Figure 5, in the above embodiments of the present application, this equipment also comprises:
Tachometer gage 14, sets up communication with processor 12 and is connected, for showing the tachometer value of engine.
In sum, above mentioned embodiment provide a kind of engine rotational speed signal collecting device, can the tach signal of convenient, fast, accurate acquisition engine by the said equipment.This engine rotational speed signal collecting device is by gathering the operation exhaust event of engine cylinder or the running frequency of combustion event, calculate the tachometer value of engine, avoid the problem that configuration is loaded down with trivial details, measuring error is large reading tach signal and cause from generator or cigar lighter.
Embodiment 2
Embodiments provide a kind of measurement of engine rotate speed method.
Fig. 6 is the process flow diagram of the measurement of engine rotate speed method according to the embodiment of the present invention.As shown in Figure 6, it is as follows that the method comprising the steps of:
Step S21, obtains the discharge frequency of engine.
Step S23, obtains the scale-up factor for calculate corresponding with the number of cylinders of engine.
Step S25, by discharge frequency and scale-up factor, calculates the tachometer value of engine.
Concrete, by above-mentioned steps S21 to step S25, by the frequency collection device arranged at blast duct for vehicle place, gather the frequency of engine exhaust, and obtain the scale-up factor for calculate corresponding with number of cylinders determined by engine operation principle.By frequency and the scale-up factor of engine exhaust, calculate the tachometer value of engine.
In the middle of practical application, according to engine four-stroke-cycle principle of work, for 4 Cylinder engines, be described.Existing 4 cylinder engines often turn 2 circles, each cylinder completes a four-stroke-cycle process, each cylinder has all carried out the action of an air inlet, compression, burning and exhaust, air inlet, compression, burning and exhaust event are all asynchronous to carry out, namely engine often completes exhaust event 4 times or completes combustion event 4 times, and cylinder can drive engine crankshaft to rotate 2 circles.So the scale-up factor of four cylinder engine rotating speed and discharge frequency, four cylinder engine rotating speed and burning frequency is 1/2.Proving by the same methods, the scale-up factor of 8 Cylinder engines is also 1/2, and the scale-up factor of 3 cylinders, 6 cylinders and twelve-cylinder engine is all 1/3.By the engine combustion collected frequency, discharge frequency and scale-up factor being calculated, generate engine rotational speed signal.This tach signal is that the sensor arranged from gas outlet directly obtains, and does not need to know the correlation parameter of generator and the speed ratio conversion ratio of engine speed and generator speed, only need know that engine cylinder number can use.Further, use said method, also do not affect by dynamo belt self transmission efficiency, improve engine speed precision.
In summary, the invention solves in prior art by needing during generator measurement engine speed value to configure multinomial generator parameter, the problem that the configuration caused is loaded down with trivial details, measuring error is large, achieve the frequency of operation calculation engine rotating speed by obtaining cylinder, computation process is simple, the effect that precision is high.
Preferably, in the above embodiments of the present application, hunting gear and rheostat can be set in gas outlet inside, hunting gear is connected with rheostat, rheostatic resistance is driven to change by the motion of hunting gear, wherein, obtain at above-mentioned steps S21 in the discharge frequency of engine, step comprises:
Step S211a, reads the voltage change at rheostat two ends.
Step S213a, is compared by voltage change and the change threshold pre-set, judges whether engine completes an exhaust event, wherein, when voltage change is greater than change threshold, judge that engine completes an exhaust event.
Step S215a, calculation engine completes the number of times of exhaust event within the unit interval, obtains discharge frequency.
Concrete, as shown in Figure 3, above-mentioned steps S211a is to step S215a, by arranging hunting gear and rheostat with the gas outlet inside of having started to be connected, obtain the discharge frequency of each engine, wherein, hunting gear is connected with rheostat, and the change of resistance occurs with the swing of hunting gear rheostat.When engine is exhausted work, drive hunting gear swings by the waste gas that engine is discharged, and resistance is also just followed engine exhaust action and changes.
In actual applications, a fixed value resistance and rheostat are carried out series winding and is connected, and the voltage that loading one is constant on two resistance of series connection.By signal converter, the change frequency of the magnitude of voltage be carried on rheostat is converted into the frequency of engine exhaust, to obtain the discharge frequency of engine cylinder.
Certainly, in order to improve the reliability of hunting gear when engine exhaust frequency is very high, on hunting gear, returning device can be installed.Returning device can pass through below hunting gear, to arrange balancing weight, go out to arrange retracing spring in hunting gear rotating shaft, and other can make hunting gear return back to the returning device of original state.
Preferably, in the above embodiments of the present application, can arrange voice operated sensor in gas outlet inside, wherein, obtain at above-mentioned steps S21 in the discharge frequency of engine, step comprises:
Step S211b, gathers the voice signal that voice operated sensor sends, and wherein, the intensity of sound value collected and the sound threshold value preset compare by voice operated sensor, when intensity of sound is greater than sound threshold value, sends voice signal.
Step S213b, when receiving a voice signal, determines that engine completes an exhaust event.
Step S215b, calculation engine completes the number of times of exhaust event within the unit interval, obtains discharge frequency.
Concrete, above-mentioned steps S211b, to step S215b, by arranging voice operated sensor with the gas outlet inside of having started to be connected, is obtaining the burning frequency of each engine.
Wherein, from the principle of work of gasoline engine, each combustion process is all that the fuel-air mixture in spark plug countercylinder is lighted, the small-scale blast of initiation.By the collection of voice operated sensor countercylinder internal explosion sound, thus realize the collection to engine combustion frequency.
In sum, above mentioned embodiment provide a kind of engine rotational speed signal acquisition method, can the tach signal of convenient, fast, accurate acquisition engine by said method.This engine rotational speed signal acquisition method is by gathering the operation exhaust event of engine cylinder or the running frequency of combustion event, calculate the tachometer value of engine, avoid the problem that configuration is loaded down with trivial details, measuring error is large reading tach signal and cause from generator or cigar lighter.
Embodiment 3
The embodiment of the present invention additionally provides a kind of engine speed measuring device, and as shown in Figure 7, this device can comprise:
A kind of engine speed measuring device, is characterized in that, arrange the sensor for gathering engine exhaust frequency at gas outlet place, device comprises: the first acquisition module 31, second acquisition module 33 and computing module 35.
Wherein, the first acquisition module 31, for obtaining the discharge frequency of engine.
Second acquisition module 33, for obtaining the scale-up factor for calculate corresponding with the number of cylinders of engine.
Computing module 35, for by discharge frequency and scale-up factor, calculates the tachometer value of engine.
Concrete, by above-mentioned first acquisition module 31, second acquisition module 33 and computing module 35, by the frequency collection device arranged at blast duct for vehicle place, gather the frequency of engine exhaust, and obtain the scale-up factor for calculate corresponding with number of cylinders determined by engine operation principle.By frequency and the scale-up factor of engine exhaust, calculate the tachometer value of engine.
In the middle of practical application, according to engine four-stroke-cycle principle of work, for 4 Cylinder engines, be described.Existing 4 cylinder engines often turn 2 circles, each cylinder completes a four-stroke-cycle process, each cylinder has all carried out the action of an air inlet, compression, burning and exhaust, air inlet, compression, burning and exhaust event are all asynchronous to carry out, namely engine often completes exhaust event 4 times or completes combustion event 4 times, and cylinder can drive engine crankshaft to rotate 2 circles.So the scale-up factor of four cylinder engine rotating speed and discharge frequency, four cylinder engine rotating speed and burning frequency is 1/2.Proving by the same methods, the scale-up factor of 8 Cylinder engines is also 1/2, and the scale-up factor of 3 cylinders, 6 cylinders and twelve-cylinder engine is all 1/3.By the engine combustion collected frequency, discharge frequency and scale-up factor being calculated, generate engine rotational speed signal.This tach signal is that the sensor arranged from gas outlet directly obtains, and does not need to know the correlation parameter of generator and the speed ratio conversion ratio of engine speed and generator speed, only need know that engine cylinder number can use.Further, use said method, also do not affect by dynamo belt self transmission efficiency, improve engine speed precision.
In summary, the invention solves in prior art by needing during generator measurement engine speed value to configure multinomial generator parameter, the problem that the configuration caused is loaded down with trivial details, measuring error is large, achieve the frequency of operation calculation engine rotating speed by obtaining cylinder, computation process is simple, the effect that precision is high.
Preferably, as shown in Figure 8, in the above embodiments of the present application, hunting gear and rheostat can be set in gas outlet inside, hunting gear is connected with rheostat, drive rheostatic resistance to change by the motion of hunting gear, wherein, the first acquisition module 31 comprises: sub-read module 311, sub-judge module 312 and the first sub-computing module 313.
Sub-read module 311, for reading the voltage change at rheostat two ends.
Sub-judge module 312, for being compared by voltage change and the change threshold pre-set, being judged whether engine completes an exhaust event, wherein, when voltage change is greater than change threshold, judging that engine completes an exhaust event.
First sub-computing module 313, completes the number of times of exhaust event, obtains discharge frequency within the unit interval for calculation engine.
Concrete, as shown in Figure 3, above-mentioned sub-read module 311, sub-judge module 312 and the first sub-computing module 313, by arranging hunting gear and rheostat with the gas outlet inside of having started to be connected, obtain the discharge frequency of each engine, wherein, hunting gear is connected with rheostat, and the change of resistance occurs with the swing of hunting gear rheostat.When engine is exhausted work, drive hunting gear swings by the waste gas that engine is discharged, and resistance is also just followed engine exhaust action and changes.
In actual applications, a fixed value resistance and rheostat are carried out series winding and is connected, and the voltage that loading one is constant on two resistance of series connection.By signal converter, the change frequency of the magnitude of voltage be carried on rheostat is converted into the frequency of engine exhaust, to obtain the discharge frequency of engine cylinder.
Certainly, in order to improve the reliability of hunting gear when engine exhaust frequency is very high, on hunting gear, returning device can be installed.Returning device can pass through below hunting gear, to arrange balancing weight, go out to arrange retracing spring in hunting gear rotating shaft, and other can make hunting gear return back to the returning device of original state.
Preferably, as shown in Figure 9, in the above embodiments of the present application, can arrange voice operated sensor in gas outlet inside, wherein, the first acquisition module 31 comprises: sub-acquisition module 314, sub-determination module 315 and the second sub-computing module 316.
Wherein, sub-acquisition module 314, for gathering the voice signal that voice operated sensor sends, wherein, the intensity of sound value collected and the sound threshold value preset compare by voice operated sensor, when intensity of sound is greater than sound threshold value, send voice signal;
Sub-determination module 315, for when receiving a voice signal, determines that engine completes an exhaust event;
Second sub-computing module 316, completes the number of times of exhaust event, obtains discharge frequency within the unit interval for calculation engine.
Concrete, above-mentioned sub-acquisition module 314, sub-determination module 315 and the second sub-computing module 316, by arranging voice operated sensor with the gas outlet inside of having started to be connected, obtaining the burning frequency of each engine.
Wherein, from the principle of work of gasoline engine, each combustion process is all that the fuel-air mixture in spark plug countercylinder is lighted, the small-scale blast of initiation.By the collection of voice operated sensor countercylinder internal explosion sound, thus realize the collection to engine combustion frequency.
In sum, above mentioned embodiment provide a kind of engine rotational speed signal harvester, can the tach signal of convenient, fast, accurate acquisition engine by said apparatus.This engine rotational speed signal harvester is by gathering the operation exhaust event of engine cylinder or the running frequency of combustion event, calculate the tachometer value of engine, avoid the problem that configuration is loaded down with trivial details, measuring error is large reading tach signal and cause from generator or cigar lighter.
It should be noted that, for aforesaid each embodiment of the method, in order to simple description, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not by the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in instructions all belongs to preferred embodiment, and involved action and module might not be that the present invention is necessary.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
In several embodiments that the application provides, should be understood that, disclosed device, the mode by other realizes.Such as, device embodiment described above is only schematic, the such as division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprises all or part of step of some instructions in order to make a computer equipment (can be personal computer, mobile terminal, server or the network equipment etc.) perform method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, ROM (read-only memory) (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), portable hard drive, magnetic disc or CD etc. various can be program code stored medium.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a measurement of engine rotate speed method, is characterized in that, arrange the sensor for gathering engine exhaust frequency at gas outlet place, described method comprises:
Obtain the discharge frequency of engine;
Obtain the scale-up factor for calculate corresponding with the number of cylinders of described engine;
By described discharge frequency and described scale-up factor, calculate the tachometer value of described engine.
2. method according to claim 1, it is characterized in that, in gas outlet inside, hunting gear and rheostat are set, described hunting gear is connected with described rheostat, described rheostatic resistance is driven to change by the motion of described hunting gear, wherein, the step obtaining the discharge frequency of engine comprises:
Read the voltage change at described rheostat two ends;
Compared by described voltage change and the change threshold pre-set, judge whether described engine completes an exhaust event, wherein, when described voltage change is greater than described change threshold, judge that described engine completes an exhaust event;
Calculate the number of times that described engine completes exhaust event within the unit interval, obtain described discharge frequency.
3. method according to claim 1, is characterized in that, arranges voice operated sensor in gas outlet inside, and wherein, the step obtaining the discharge frequency of engine comprises:
Gather the voice signal that voice operated sensor sends, wherein, the intensity of sound value collected and the sound threshold value preset compare by described voice operated sensor, when described intensity of sound is greater than described sound threshold value, send described voice signal;
When receiving once described voice signal, determine that described engine completes an exhaust event;
Calculate the number of times that described engine completes exhaust event within the unit interval, obtain described discharge frequency.
4. an engine speed measuring device, is characterized in that, arrange the sensor for gathering engine exhaust frequency at gas outlet place, described device comprises:
First acquisition module, for obtaining the discharge frequency of engine;
Second acquisition module, for obtaining the scale-up factor for calculate corresponding with the number of cylinders of described engine;
Computing module, for by described discharge frequency and described scale-up factor, calculates the tachometer value of described engine.
5. device according to claim 4, is characterized in that, arranges hunting gear and rheostat in gas outlet inside, described hunting gear is connected with described rheostat, drive described rheostatic resistance to change by the motion of described hunting gear, wherein, described first acquisition module comprises:
Sub-read module, for reading the voltage change at described rheostat two ends;
Sub-judge module, for being compared by described voltage change and the change threshold pre-set, judge whether described engine completes an exhaust event, wherein, when described voltage change is greater than described change threshold, judge that described engine completes an exhaust event;
First sub-computing module, completes the number of times of exhaust event within the unit interval for calculating described engine, obtain described discharge frequency.
6. device according to claim 4, is characterized in that, arranges voice operated sensor in gas outlet inside, and wherein, described first acquisition module comprises:
Sub-acquisition module, for gathering the voice signal that voice operated sensor sends, wherein, the intensity of sound value collected and the sound threshold value preset compare by described voice operated sensor, when described intensity of sound is greater than described sound threshold value, send described voice signal;
Sub-determination module, for when receiving once described voice signal, determines that described engine completes an exhaust event;
Second sub-computing module, completes the number of times of exhaust event within the unit interval for calculating described engine, obtain described discharge frequency.
7. a measurement of engine rotate speed equipment, is characterized in that, described equipment comprises: frequency collection device, processor, wherein,
Described frequency collection device, is installed in the exhaust pipe of engine, for obtaining the discharge frequency of engine;
Described processor, sets up communication with described frequency collection device and is connected, and for by described discharge frequency and the scale-up factor for calculating pre-set, calculates the tachometer value of described engine.
8. equipment according to claim 7, is characterized in that, described frequency collection device comprises:
Hunting gear, for gathering the exhaust event of described engine;
Returning device, is connected with described hunting gear, for described hunting gear is returned back to initial position;
Rheostat, is connected with described hunting gear, and described rheostatic resistance changes with the motion of hunting gear;
Resistor, connects with described rheostat;
First signal converter, with described varistors in parallel, for being converted into frequency signal by the voltage change at described rheostat two ends.
9. equipment according to claim 7, is characterized in that, described frequency collection device comprises:
Voice operated sensor, for the intensity of sound that the cylinder gathering described engine sends, the intensity of sound value collected and the sound threshold value preset compare by described voice operated sensor, when described intensity of sound is greater than described sound threshold value, send voice signal;
Secondary signal converter, sets up communication with described voice operated sensor and is connected, for described voice signal is converted into frequency signal.
10. according to the equipment in claim 7 to 9 described in any one, it is characterized in that, described equipment also comprises:
Tachometer gage, described tachometer gage is set up communication with described processor and is connected, for showing the tachometer value of described engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN109752565A (en) * | 2019-03-02 | 2019-05-14 | 吉林大学 | A kind of tractor engine measurement of rotating speed meter |
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Effective date of registration: 20171205 Address after: 102206 Changping District City, Shahe, Sha Yang Road, Beijing Applicant after: Beiqi Futian Automobile Co., Ltd. Address before: 262200 Shandong city of Weifang Province Zhucheng City Longyuan Street No. 1 Applicant before: Feitian, Zhucheng auto technology development corporation, Ltd. Applicant before: Beiqi Futian Automobile Co., Ltd. |
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