CN204575672U - A kind of non-contact engine knotmeter - Google Patents
A kind of non-contact engine knotmeter Download PDFInfo
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- CN204575672U CN204575672U CN201520127898.9U CN201520127898U CN204575672U CN 204575672 U CN204575672 U CN 204575672U CN 201520127898 U CN201520127898 U CN 201520127898U CN 204575672 U CN204575672 U CN 204575672U
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Abstract
The utility model discloses a kind of non-contact engine knotmeter, described knotmeter comprises sound pressure sensor, Signal-regulated kinase, signal analysis and processing module, wireless transport module, input control module, display module and host computer; Sound pressure sensor sends Signal-regulated kinase to after converting the engine running sound detected to voltage signal, signal analysis and processing module is exported to after the voltage signal that sound pressure sensor collects by Signal-regulated kinase processes, the voltage signal that signal analysis and processing module basis signal conditioning module transports, and the steering order of input control module input or calculate the rotating speed of engine by the steering order that wireless transport module receives host computer input, the engine speed calculated is uploaded to display module and host computer by signal analysis and processing module again.This knotmeter without the need to carrying out dismounting to vehicle, time saving and energy saving and convenient operation, and there is whole system structure simply, accurately and reliably, the feature such as with low cost.
Description
Technical field
The utility model relates to engine speed measuring equipment technical field, is specifically related to a kind of non-contact engine knotmeter.
Background technology
Rotating speed is one of engine important parameter, the height of engine speed, be related to the number of work in unit time number of times or the size of effective engine power, namely the useful power of engine changes with the difference of rotating speed, therefore, when the size of effective engine power is described, its corresponding rotating speed must be indicated simultaneously.Current domestic project motor vehicles and machines substantial amounts, Some vehicles does not install built-in motor rotational speed meters or built-in rotational speed meters fault, when evaluating vehicle technology state, needs a kind of succinct engine speed detection method fast.
Existing detection method mainly contact type measurement, usual employing speed probe, corresponding with the signal teeth above flywheel, need during measurement to open engine housing, after equipment type approval is equipped, it is unallowed for carrying out transformation to engine, therefore needs a kind of contactless rotation-speed measuring device test engine speed or carry out fault judge to engine embedded speed probe.
Chinese patent ZL:201120229352.6 discloses a kind of Portable vehicle tachymeter, it comprises: STC12C2052AD control system module, photoelectric sensor, numeral method module, 24C04 memory module, MAX232 communication module, power module, P521 optocoupler signal processing module, signal input jack, AD input jack, function selection key and corresponding pilot lamp.The portable speed-measuring instrument that the utility model provides is applicable to measured automobiles engine, the rotating speeds such as wheel, only need dry cell to provide energy, have volume little, quality is light, low in energy consumption, structure is simple, multiple functional, easy to carry when applying, the rotating speed of surveyed parts can not only be shown constantly, data can also be stored and upload to the feature of PC being drawn dependent linearity figure.This knotmeter structure is comparatively complicated, operation inconvenience.
Chinese patent ZL:200520025502.6 discloses a kind of rotating speed detector for gas heat pump engine, primarily of gear, sensor and related circuit three part form.Gear is magnetic conduction rigid material.Gear is fixed on the main shaft of gas engine, gear centre and engine axle center are positioned at same axial line.Tachogenerator is arranged on to be located apart from gear about 1.5 ~ 3mm, and the axle center of sensor is vertical with the tangent plane of gear.The output signal of sensor is connected to corresponding F/V change-over circuit.The utility model can realize the accurate measurement of engine speed in gas engine heat pump system, and can binary number be become to be stored in micro computer the results conversion of measurement, thus realizes the automatic control of system.This utility model needs when testing the speed to be connected with engine spindle.Very inconvenient during practical operation.
Utility model content
The utility model object is, overcomes defect of the prior art, provides a kind of simple to operate, non-contact engine Rotating speed measring instrument accurately and reliably.
For realizing above-mentioned utility model object, the technical solution of the utility model is: provide a kind of non-contact engine knotmeter, and described knotmeter comprises sound pressure sensor, Signal-regulated kinase, signal analysis and processing module, wireless transport module, input control module, display module and host computer; Sound pressure sensor sends Signal-regulated kinase to after converting the engine running sound detected to voltage signal, signal analysis and processing module is exported to after the voltage signal that sound pressure sensor collects by Signal-regulated kinase processes, the voltage signal that signal analysis and processing module basis signal conditioning module transports, and the steering order of input control module input or calculate the rotating speed of engine by the steering order that wireless transport module receives host computer input, the engine speed calculated is uploaded to display module and host computer by signal analysis and processing module again.
Wherein preferred technical scheme is, described sound pressure sensor, Signal-regulated kinase, signal analysis and processing module, wireless transport module, input control module, display module are connected with substrate respectively, described substrate is installed in the inside of the first housing, and sound pressure sensor is installed in the outside of the first housing.
Preferred technical scheme also has, and described wireless transport module is connected with host computer by wireless receiving module.
Preferred technical scheme is that described wireless receiving module is installed in the second housing, is provided with USB interface on the second housing further, and wireless receiving module is connected with host computer by the data line be plugged in USB interface.
Preferred technical scheme is further, the filtering that described Signal-regulated kinase is made up of one group of operational amplifier and resistance, electric capacity, amplifying circuit.
Preferred technical scheme is further, the circuit module that described signal analysis and processing module is is core with MC9S12XS128 single-chip microcomputer, single-chip microcomputer collection through Signal-regulated kinase conditioning after voltage signal and obtain engine speed after FFT conversion is carried out to voltage signal.
Preferred technical scheme is further, the circuit module that described wireless transport module is is core with nRF905 monolithic wireless transceiver.
Preferred technical scheme is provided with function button on described first housing further.
Preferred technical scheme also has, and described display module is liquid crystal display.
Advantage of the present utility model and beneficial effect be, described non-contact engine knotmeter is without the need to carrying out dismounting to engineering machinery vehicle, and time saving and energy saving and convenient operation, solves the technical matters of complicated operation in existing detection method.And there is whole system structure simply, accurately and reliably, the feature such as with low cost.
Accompanying drawing explanation
Fig. 1 is the circuit structure block diagram of the utility model non-contact engine knotmeter;
Fig. 2 is the circuit theory diagrams of Signal-regulated kinase in Fig. 1;
Fig. 3 is the circuit theory diagrams of signal analysis and processing module in Fig. 1;
Fig. 4 is the circuit theory diagrams of wireless transport module in Fig. 1;
Fig. 5 is the circuit theory diagrams of input control module in Fig. 1;
Fig. 6 is the circuit theory diagrams of display module in Fig. 1;
Fig. 7 is the actual testing example schematic diagram of the utility model non-contact engine knotmeter.
In figure: 1-sound pressure sensor, 2-Signal-regulated kinase, 3-signal analysis and processing module, 4-wireless transport module, 5-input control module, 6-display module, 7-host computer, 8-first housing, 9-wireless receiving module, 10-second housing, 11-USB interface, 12-function button, 13-engine, 14-offgas duct.
Embodiment
As shown in Figure 1, the utility model is a kind of non-contact engine knotmeter, and described knotmeter comprises sound pressure sensor 1, Signal-regulated kinase 2, signal analysis and processing module 3, wireless transport module 4, input control module 5, display module 6 and host computer 7, sound pressure sensor 1 sends Signal-regulated kinase 2 to after converting the engine running sound detected to voltage signal, signal analysis and processing module 3 is exported to after the voltage signal that sound pressure sensor collects by Signal-regulated kinase 2 processes, the voltage signal that signal analysis and processing module 3 basis signal conditioning module 2 transports, and the steering order that inputs of input control module 5 or receive by wireless transport module 4 steering order that host computer 7 inputs and calculate the rotating speed of engine, the engine speed calculated is uploaded to display module 6 and host computer 7 by signal analysis and processing module 3 again.
The preferred embodiment of the utility model is, described sound pressure sensor 1, Signal-regulated kinase 2, signal analysis and processing module 3, wireless transport module 4, input control module 5, display module 6 are connected with substrate respectively, described substrate is installed in the inside of the first housing 8, and sound pressure sensor 1 is installed in the outside of the first housing 8.
The preferred embodiment of the utility model also has, and described wireless transport module 4 is connected with host computer 7 by wireless receiving module 9.
The utility model further preferred embodiment is, described wireless receiving module 9 is installed in the second housing 10, and the second housing 10 is provided with usb 11, and wireless receiving module 9 is connected with host computer by the data line be plugged on usb 11.
As shown in Figure 2, the utility model further preferred embodiment is, the filtering that described Signal-regulated kinase 2 is made up of one group of operational amplifier and resistance, electric capacity, amplifying circuit.Signal-regulated kinase 2 processes the signal collected by sound pressure sensor 1, and filtering noise signals and the voltage signal by sound pressure sensor 1 nurse one's health proper range to adapt to the collection of single-chip microcomputer to simulating signal.
As shown in Figure 3, the utility model further preferred technical scheme is, the circuit module that described signal analysis and processing module 3 is is core with MC9S12XS128 single-chip microcomputer, single-chip microcomputer collection through Signal-regulated kinase conditioning after voltage signal and obtain engine speed after FFT conversion is carried out to voltage signal.Signal processing module 3 responds the instruction of input control module 5 simultaneously, to change systematic parameter in time, is convenient to calculation engine rotating speed.
As shown in Figure 4, the further preferred technical scheme of the utility model is that the circuit module that described wireless transport module 4 is is core with nRF905 monolithic wireless transceiver, for realizing radio communication with host computer 7.Wireless transport module 4 transfers to host computer 7 for signal analysis and processing 3 is calculated gained tachometer value.
As shown in Figure 5, Figure 6, the input control module 5 in the utility model and display module 6 are general knowledge known in this field, repeat no more.Display module 6 calculates engine speed value and the sound pressure sensor 1 input signal strength value of gained for display analysis and processing module 3.Input control module 5 is for setting engine cylinder number.
The utility model further preferred technical scheme is provided with function button 12 on described first housing 8.
The preferred technical scheme of the utility model also has, and described display module 6 is liquid crystal display.
As shown in Figure 7, the using method of the utility model non-contact engine knotmeter is, after automobile starting, opens the switch of non-contact engine knotmeter, by function key 12 parameters.Non-contact engine knotmeter can be used in position in the figure 7 near 1 of automobile engine 3, near automobile tail gas pipe 14, non-contact engine knotmeter near 1 of automobile engine 3 during position sound pressure sensor 1 point to engine; Position near automobile tail gas pipe 14, the sound pressure sensor 1 of non-contact engine knotmeter need point to the tube wall of gas outlet.Now display module 6 has engine speed display.If need to upload to host computer 7, built-in wireless communication module 7 sends data, and in figure, 7 host computers 7 and wireless receiving module 9 to be linked by data line by usb 11 and get final product receiving real-time data.
During test, sound pressure sensor 1 is arranged should select appropriate location, and generally, engine sound is comparatively large, can measure near engine 13; When engine 13 sound is less or interference is very strong, can measure near gas outlet 14 wall, but forbid straight to exhaust pipe mouth.
The utility model is not limited to above-mentioned embodiment, those skilled in the art make to any apparent improvement of above-mentioned embodiment or change, all can not exceed the protection domain of design of the present utility model and claims.
Claims (9)
1. a non-contact engine knotmeter, is characterized in that, described knotmeter comprises sound pressure sensor, Signal-regulated kinase, signal analysis and processing module, wireless transport module, input control module, display module and host computer; Sound pressure sensor sends Signal-regulated kinase to after converting the engine running sound detected to voltage signal, signal analysis and processing module is exported to after the voltage signal that sound pressure sensor collects by Signal-regulated kinase processes, the voltage signal that signal analysis and processing module basis signal conditioning module transports, and the steering order of input control module input or calculate the rotating speed of engine by the steering order that wireless transport module receives host computer input, the engine speed calculated is uploaded to display module and host computer by signal analysis and processing module again.
2. non-contact engine knotmeter as claimed in claim 1, it is characterized in that, described sound pressure sensor, Signal-regulated kinase, signal analysis and processing module, wireless transport module, input control module, display module are connected with substrate respectively, described substrate is installed in the inside of the first housing, and sound pressure sensor is installed in the outside of the first housing.
3. non-contact engine knotmeter as claimed in claim 1, it is characterized in that, described wireless transport module is connected with host computer by wireless receiving module.
4. non-contact engine knotmeter as claimed in claim 3, it is characterized in that, described wireless receiving module is installed in the second housing, is provided with USB interface on the second housing, and wireless receiving module is connected with host computer by the data line be plugged in USB interface.
5. non-contact engine knotmeter as claimed in claim 1, is characterized in that, the filtering that described Signal-regulated kinase is made up of one group of operational amplifier and resistance, electric capacity, amplifying circuit.
6. non-contact engine knotmeter as claimed in claim 1, it is characterized in that, the circuit module that described signal analysis and processing module is is core with MC9S12XS128 single-chip microcomputer, single-chip microcomputer collection through Signal-regulated kinase conditioning after voltage signal and obtain engine speed after FFT conversion is carried out to voltage signal.
7. non-contact engine knotmeter as claimed in claim 1, is characterized in that, the circuit module that described wireless transport module is is core with nRF905 monolithic wireless transceiver.
8. non-contact engine knotmeter as claimed in claim 2, is characterized in that, described first housing is provided with function button.
9. non-contact engine knotmeter as claimed in claim 1, it is characterized in that, described display module is liquid crystal display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520127898.9U CN204575672U (en) | 2015-03-05 | 2015-03-05 | A kind of non-contact engine knotmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520127898.9U CN204575672U (en) | 2015-03-05 | 2015-03-05 | A kind of non-contact engine knotmeter |
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| Publication Number | Publication Date |
|---|---|
| CN204575672U true CN204575672U (en) | 2015-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520127898.9U Expired - Fee Related CN204575672U (en) | 2015-03-05 | 2015-03-05 | A kind of non-contact engine knotmeter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107411847A (en) * | 2016-11-11 | 2017-12-01 | 清华大学 | A kind of artificial larynx and its sound converting method |
| CN109752565A (en) * | 2019-03-02 | 2019-05-14 | 吉林大学 | A kind of tractor engine measurement of rotating speed meter |
| CN110108467A (en) * | 2019-05-20 | 2019-08-09 | 长沙理工大学 | Active sounding speed-measuring method based on portable mobile apparatus |
-
2015
- 2015-03-05 CN CN201520127898.9U patent/CN204575672U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107411847A (en) * | 2016-11-11 | 2017-12-01 | 清华大学 | A kind of artificial larynx and its sound converting method |
| CN107411847B (en) * | 2016-11-11 | 2020-04-14 | 清华大学 | Artificial larynx and its sound conversion method |
| CN109752565A (en) * | 2019-03-02 | 2019-05-14 | 吉林大学 | A kind of tractor engine measurement of rotating speed meter |
| CN110108467A (en) * | 2019-05-20 | 2019-08-09 | 长沙理工大学 | Active sounding speed-measuring method based on portable mobile apparatus |
| CN110108467B (en) * | 2019-05-20 | 2020-10-20 | 长沙理工大学 | Active sounding speed measurement method based on portable mobile equipment |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 Termination date: 20170305 |
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| CF01 | Termination of patent right due to non-payment of annual fee |