CN203519631U - Turbocharger rotation speed measuring system - Google Patents
Turbocharger rotation speed measuring system Download PDFInfo
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- CN203519631U CN203519631U CN201320638492.8U CN201320638492U CN203519631U CN 203519631 U CN203519631 U CN 203519631U CN 201320638492 U CN201320638492 U CN 201320638492U CN 203519631 U CN203519631 U CN 203519631U
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- rotation speed
- pressure sensor
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- sound pressure
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- 238000005070 sampling Methods 0.000 claims abstract description 6
- 230000000737 periodic effect Effects 0.000 claims abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 8
- 230000006378 damage Effects 0.000 abstract description 6
- 238000012545 processing Methods 0.000 abstract description 4
- 230000003321 amplification Effects 0.000 abstract description 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 2
- 230000003750 conditioning effect Effects 0.000 abstract 4
- 238000000034 method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The utility model relates to a turbocharger rotation speed measuring system. The turbocharger rotation speed measuring system comprises a sound pressure sensor which can detect ultrasonic signals which are generated by turbine blades of a turbocharger due to periodic vibration, a signal conditioning device connected with the sound pressure sensor, an A/D converter connected with the signal conditioning device, a data cache connected with the A/D converter, a high-pass filter connected with the data cache, a computer connected with the high-pass filter and a rotation speed display device connected on the computer; the signal conditioning device comprises a preamplifier, an anti-aliasing filter and a sampling holder; and in the signal conditioning device, signal amplification, anti-aliasing processing and sampling holding processing are performed. The turbocharger rotation speed measuring system of the utility model is advantageous in no damage to the supercharger, simple structure, convenient signal collection, and accurate and reliable measurement results.
Description
Technical field
The utility model relates to turbocharger rotational speed field, specifically a kind of turbocharger rotational speed system.
Background technology
Measurement for supercharger speed is at present contact type measurement, can use current vortex sensor or magnetoelectric sensor.Use current vortex sensor on turbosupercharger shell, to punch, sensor stretched into wherein, just can measure eddy pressurizer blade by time the pulse signal that produces.Visible, use current vortex sensor can destroy the structure of supercharger itself, meanwhile, the difficulty of supercharger punching is larger, and cost compare is high, need to carry out punch operation to the supercharger of each test.Magnetoelectric sensor size is larger, need to magnetize measurand, and output signal is relatively little, be generally millivolt level, magnetoelectric sensor does not destroy supercharger, but output signal amplitude is less, especially when the slow-speed of revolution, signal amplitude is less, and application has certain limitation.In addition, when magnetoelectric sensor is measured, to be fixed on supercharger shell, can be subject to the impact of test condition and cause difficulty to measurement.
When supercharger, on car load, installing space is hour, adopt the method for direct contact type to measure the very large difficulty of supercharger speed existence, so need at present a kind of supercharger that neither damages, device that again can convenient measurement supercharger speed, to realize the reliable measurements to supercharger speed.
Utility model content
The technical problems to be solved in the utility model is to provide a kind ofly can not damage supercharger and simple in structure, signals collecting is convenient, measurement result turbocharger rotational speed system accurately and reliably.
For solving the problems of the technologies described above, the design feature of turbocharger rotational speed system of the present utility model is to comprise sound pressure sensor, the signal conditioner being connected with above-mentioned sound pressure sensor, the A/D converter being connected with above-mentioned signal conditioner, the data buffer storage being connected with above-mentioned A/D converter, the Hi-pass filter being connected with above-mentioned data buffer storage, the computing machine being connected with above-mentioned Hi-pass filter and the rotating speed display device being connected on computers that the ultrasonic signal that turbocharger turbine blade produces because of periodic vibration can be detected.
During turbocharger operation, due to process turbine case the lip of the tongue timesharing in turbo blade rotation, experiencing larger pressure changes, thereby impeller is produced to larger exciting effect, cause periodically vibration and produce ultrasonic acoustic pressure sensor and respond to above-mentioned ultrasonic signal of turbo blade, and pass through successively the signal condition of signal conditioner, the analog to digital conversion of A/D converter, the signal rate adjustment of data buffer storage, the low frequency signal of Hi-pass filter filters, the final computing machine that arrives, Computer Analysis obtains the feature of ultrasonic signal, obtain frequency of sound wave f, according to the characteristic formula of turbosupercharger:
(in formula: f---the frequency of sound wave (Hz) that blade rotary produces, n---supercharger speed, k---overtone order), wherein, overtone order k equals the number of blade, and the number of blade is known, calculates the tachometer value of supercharger and shows by rotating speed display device, facilitates staff intuitively to observe.Visible, the utility model does not need supercharger to punch and other destructions, has guaranteed the integrality of supercharger, by ultrasonic signal is carried out to multiple-stage treatment, has guaranteed the accuracy of supercharger speed simultaneously.
Described signal conditioner comprises prime amplifier, the mixed wave filter of anti-frequency and sampling holder.In signal conditioner, entered signal amplification, anti-Frequency mixing processing and sampling and keep processing.
Described signal conditioner, A/D converter, data buffer storage, Hi-pass filter and computing machine are installed in a box body, and described rotating speed display device is the display screen being arranged on box body, between described sound pressure sensor and box body, by data line, are connected.
In sum, the utility model can not damage supercharger and simple in structure, signals collecting is convenient, measurement result accurately and reliably.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Fig. 1 is structural representation of the present utility model.
Embodiment
With reference to accompanying drawing, turbocharger rotational speed system of the present utility model comprises and being arranged near turbosupercharger 1 and for gathering sound pressure sensor 2, the signal conditioner 3 being connected with above-mentioned sound pressure sensor 2, the A/D converter 4 being connected with above-mentioned signal conditioner 3, the data buffer storage 5 being connected with above-mentioned A/D converter 4, the Hi-pass filter 6 being connected with above-mentioned data buffer storage 5, the computing machine 7 being connected with above-mentioned Hi-pass filter 6 of the ultrasonic signal that booster turbine blade produces because of periodic vibration and being connected to the rotating speed display device 8 on computing machine 7.Signal conditioner 3 comprises prime amplifier 31, the mixed wave filter 32 of anti-frequency and sampling holder 33.
When turbosupercharger 1 is worked, due to process turbine case the lip of the tongue timesharing in turbo blade rotation, experience larger pressure and change, thereby impeller is produced to larger exciting effect, cause the periodic vibration of turbo blade and generation ultrasound wave.Wherein, the installation site of sound pressure sensor 2 is uncertain, and it can be placed near on the optional position of turbosupercharger 1, can sense that above-mentioned ultrasonic signal is limited.
With reference to accompanying drawing, sound pressure sensor 2 induction ultrasonic signals, and successively through the signal condition of signal conditioner 3, the signal rate adjustment of the analog to digital conversion of A/D converter 4, data buffer storage 5, the low frequency signal of Hi-pass filter 6 filter, the final computing machine that arrives, the feature of Computer Analysis ultrasonic signal, obtain frequency of sound wave f, according to the characteristic formula of turbosupercharger:
(in formula: f---the frequency of sound wave that blade rotary produces; N---supercharger speed; K---overtone order), wherein overtone order k equals the number of blade, and the number of blade is known, and Computer is calculated the tachometer value of supercharger and shown by rotating speed display device, facilitates staff intuitively to observe.Visible, the utility model does not need turbosupercharger 1 to punch and other destructions, has guaranteed the integrality of supercharger, by ultrasonic signal is carried out to multiple-stage treatment, has guaranteed the accuracy of supercharger speed simultaneously.
For the utility model is formed to product, not shown, signal conditioner 3, A/D converter 4, data buffer storage 5, Hi-pass filter 6 and computing machine 7 are installed in a box body, rotating speed display device 8 is for being arranged on the display screen on box body, between sound pressure sensor 2 and box body, by data line, is connected.During this kind arranges, the position of sound pressure sensor 2 can be moved arbitrarily, and it is connected on box body by data line, and box body can be placed on the position away from test site.
In sum, the utility model is not limited to above-mentioned embodiment.Those skilled in the art, not departing under the prerequisite of spirit and scope of the present utility model, can do some changes and modification.Protection domain of the present utility model should be as the criterion with claim of the present utility model.
Claims (3)
1. a turbocharger rotational speed system, it is characterized in that comprising the sound pressure sensor (2) that the ultrasonic signal that turbosupercharger (1) turbo blade produces because of periodic vibration can be detected, the signal conditioner (3) being connected with above-mentioned sound pressure sensor (2), the A/D converter (4) being connected with above-mentioned signal conditioner (3), the data buffer storage (5) being connected with above-mentioned A/D converter (4), the Hi-pass filter (6) being connected with above-mentioned data buffer storage (5), the computing machine (7) being connected with above-mentioned Hi-pass filter (6) and be connected to the rotating speed display device (8) on computing machine (7).
2. turbocharger rotational speed system as claimed in claim 1, is characterized in that described signal conditioner (3) comprises prime amplifier (31), the mixed wave filter (32) of anti-frequency and sampling holder (33).
3. turbocharger rotational speed system as claimed in claim 1 or 2, it is characterized in that described signal conditioner (3), A/D converter (4), data buffer storage (5), Hi-pass filter (6) and computing machine (7) are installed in a box body, described rotating speed display device (8) is for being arranged on the display screen on box body, between described sound pressure sensor (2) and box body, by data line, is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320638492.8U CN203519631U (en) | 2013-10-16 | 2013-10-16 | Turbocharger rotation speed measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320638492.8U CN203519631U (en) | 2013-10-16 | 2013-10-16 | Turbocharger rotation speed measuring system |
Publications (1)
| Publication Number | Publication Date |
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| CN203519631U true CN203519631U (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320638492.8U Expired - Lifetime CN203519631U (en) | 2013-10-16 | 2013-10-16 | Turbocharger rotation speed measuring system |
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| Country | Link |
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| CN (1) | CN203519631U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162808A (en) * | 2018-08-31 | 2019-01-08 | 安徽理工大学 | A kind of device and its measurement method measuring turbo charger speed |
-
2013
- 2013-10-16 CN CN201320638492.8U patent/CN203519631U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162808A (en) * | 2018-08-31 | 2019-01-08 | 安徽理工大学 | A kind of device and its measurement method measuring turbo charger speed |
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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: WEICHAI POWER (WEIFANG) REMANUFACTURING CO.,LTD. Assignor: WEICHAI POWER Co.,Ltd. Contract record no.: 2015990000879 Denomination of utility model: Turbocharger rotation speed measuring system Granted publication date: 20140402 License type: Exclusive License Record date: 20151022 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140402 |
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| CX01 | Expiry of patent term |