CN203385511U - Knock sensor test system - Google Patents
Knock sensor test system Download PDFInfo
- Publication number
- CN203385511U CN203385511U CN201320268613.4U CN201320268613U CN203385511U CN 203385511 U CN203385511 U CN 203385511U CN 201320268613 U CN201320268613 U CN 201320268613U CN 203385511 U CN203385511 U CN 203385511U
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- detonation sensor
- bumper
- electrically connected
- test macro
- signal analyzer
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- 230000001133 acceleration Effects 0.000 claims abstract description 32
- 238000005474 detonation Methods 0.000 claims description 90
- 238000001514 detection method Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
A knock sensor test system provided by the utility model is used to detect a knock sensor, and comprises a jolting table used for generating vibration and transmitting the vibration to the knock sensor, and electrically connected with a dynamic signal analyzer; an acceleration sensor used for acquiring an accelerating force of the actual vibration of the jolting table, arranged on the jolting table and electrically connected with the dynamic signal analyzer; the dynamic signal analyzer used for sending a vibration test signal to the jolting table, receiving a first feedback vibration signal of the knock sensor and a second feedback vibration signal of the acceleration sensor respectively and analyzing the first and second feedback vibration signals, and electrically connected with the acceleration sensor. The knock sensor test system of utility model can measure the vibration output performance of the knock sensor accurately and rapidly.
Description
Technical field
The utility model relates to a kind of control assembly of engine ignition, particularly relates to a kind of detonation sensor test macro.
Background technology
Detonation sensor is a kind of AC signal generator that is used for measuring engine shake degree, normally a kind of piezo-electric device.Detonation sensor energy sense mechanism pressure or vibration.For example, can produce alternating voltage when engine plays pinking.Too early, exhaust gas recirculatioon is bad in igniting, and the combustion knock that the reasons such as low grade fuel oil cause can cause engine to damage.Detonation sensor provides detonation signal to computer (have pass through control module), makes computer can readjust ignition timing to stop further pinking.Detonation sensor is placed in the diverse location of engine block or cylinder.When vibration or engine knock generation, it produces a small voltage peak value, and engine knock or vibration are larger, and detonation sensor product main peak value is just larger, and certain high frequency shows pinking or engine knock, and detonation sensor is usually designed to the vibrations in measurement 5 to 15 kilohertz range.When control module receives the vibrations of these frequencies, computer is revised ignition timing again, to stop, continues pinking.
Detonation sensor, for detection of the detonation signal of automobile engine cylinder-body.Whether automobile computer need to export to judge that whether igniting is successful according to the vibration signal of this detonation sensor, need again to light a fire.If sensor output signal is inaccurate, will cause automobile computer erroneous judgement, gently cause loss of ignition, heavy cause engine cylinder-body to explode.The signal of exporting due to detonation sensor belongs to dynamic weak signal, and how to detect aborning its vibrations performance is a relatively stubborn problem always.
The utility model content
The purpose of this utility model is to provide a kind ofly can carry out the quick detonation sensor test macro detected to detonation sensor.
Detonation sensor test macro of the present utility model, for detection of detonation sensor, comprising:
For generation of the bumper that shakes and vibrations are passed to described detonation sensor;
For gathering the acceleration transducer of accelerating force of the actual vibrations of described bumper, be installed on described bumper, and be electrically connected to described dynamic signal analyzer;
For sending the vibration test signal to described bumper and receiving respectively the first feedback vibration signal of described detonation sensor and the second feedback vibration signal of described acceleration transducer, and analyze the dynamic signal analyzer of described the first feedback signal and described the second feedback signal, with described acceleration transducer, described bumper, be electrically connected to respectively.
Detonation sensor test macro of the present utility model, wherein, also comprise the load circuit for fictitious load, described load circuit makes the first feedback vibration signal of described detonation sensor change magnitude of voltage into, the input end of described load circuit is for being electrically connected to described detonation sensor, and the output terminal of described load circuit is electrically connected to described dynamic signal analyzer.
Detonation sensor test macro of the present utility model, wherein, described acceleration transducer is electrically connected to described dynamic signal analyzer by charge amplifier.
Detonation sensor test macro of the present utility model, wherein, described dynamic signal analyzer is electrically connected to computer, and described computer is for calculating, store, show the analysis result of described dynamic signal analyzer.
Detonation sensor test macro of the present utility model, wherein, described dynamic signal analyzer is electrically connected to described bumper by power amplifier.
Detonation sensor test macro of the present utility model, wherein, the center of described acceleration transducer, the center of described bumper are all on a straight line perpendicular to the upper surface of described bumper.
Detonation sensor test macro of the present utility model, wherein, also comprise that described frock is secured by bolts on described bumper for the frock of described acceleration transducer and described detonation sensor is installed, described acceleration transducer is fixed on described frock.
Detonation sensor test macro of the present utility model, wherein, described frock is cylindrical shape, the center on the surface of described frock is provided with the mounting hole extended vertically downward, described acceleration sensor is secured by bolts in the diapire of described mounting hole, the inwall of described mounting hole is provided with screw thread, so that described detonation sensor is fixed on described frock by described screw thread.
Use detonation sensor test macro of the present utility model, can measure quickly and accurately the vibrations output performance of detonation sensor, avoid the bad detonation sensor of performance to be installed on automobile, so that affect the security of automobile.
The accompanying drawing explanation
The circuit connection diagram that Fig. 1 is detonation sensor test macro of the present utility model;
The circuit diagram that Fig. 2 is load circuit of the present utility model;
The mounting structure schematic diagram that Fig. 3 is bumper in detonation sensor test macro of the present utility model, frock and detonation sensor to be detected;
The performance output valve that Fig. 4 is a kind of underproof detonation sensor and the corresponding oscillogram of frequency;
The performance output valve that Fig. 5 is a kind of qualified detonation sensor and the corresponding oscillogram of frequency.
Embodiment
As shown in Figure 1, detonation sensor test macro of the present utility model is for detection of detonation sensor.Detonation sensor test macro of the present utility model comprises:
For gathering the acceleration transducer 4 of accelerating force of the actual vibrations of bumper, be installed on bumper 2, and be electrically connected to dynamic signal analyzer 3;
For sending the vibration test signal to bumper 2 and receiving respectively the first feedback vibration signal of detonation sensor and the second feedback vibration signal of acceleration transducer 4, and analyze the dynamic signal analyzer 3 of the first feedback signal and the second feedback signal.
Dynamic signal analyzer 3 is electrically connected to acceleration transducer 4 and bumper 2 respectively.
When detonation sensor test macro of the present utility model is started working, detonation sensor to be tested 11 is fixed on bumper 2, detonation sensor to be tested 11 is electrically connected to dynamic signal analyzer 3 simultaneously.Utilize dynamic signal analyzer 3 to send the vibration test signal and receive respectively the first feedback vibration signal of detonation sensor to be detected 11 and the second feedback vibration signal of acceleration transducer 4 to bumper 2, and analyze the first feedback signal and the second feedback signal, judge that by the staff whether detonation sensor is qualified by the result of analyzing.
Shown in Fig. 2, detonation sensor test macro of the present utility model also comprises the load circuit 6 for fictitious load.Load circuit 6 makes the first feedback vibration signal of detonation sensor to be detected 11 change magnitude of voltage into.
The input end 61 of load circuit 6 is electrically connected to for the detonation sensor 11 with to be detected, and the output terminal 62 of load circuit 6 is electrically connected to dynamic signal analyzer 3.When detonation sensor test macro of the present utility model is started working, detonation sensor 11 to be detected is electrically connected to dynamic signal analyzer 3 by load circuit 6.
Load circuit 6 comprises electric capacity 63 and resistance 64.Electric capacity 63 and resistance 64 parallel connections.The two ends of resistance 64 are in parallel with two output terminals 62; The two ends of electric capacity 63 are in parallel with the input end 61 of load circuit 6.
Detonation sensor test macro of the present utility model, wherein, acceleration transducer 4 is electrically connected to dynamic signal analyzer 3 by charge amplifier 7.
Detonation sensor test macro of the present utility model, wherein, dynamic signal analyzer 3 is electrically connected to bumper 2 by power amplifier 8.
Detonation sensor test macro of the present utility model, wherein, dynamic signal analyzer 3 is electrically connected to computer 9.Computer 9 is for calculating, store, show the analysis result of dynamic signal analyzer 3.
Shown in Fig. 3, detonation sensor test macro of the present utility model, wherein, the center of the center of acceleration transducer 4, bumper 2 is all on the straight line of a upper surface perpendicular to bumper 2 21.
Detonation sensor test macro of the present utility model, also comprise for the frock 10 of acceleration transducer 4 and detonation sensor 11 to be detected is installed.Frock 10 is secured by bolts on bumper 2, and acceleration transducer 4 is fixed on frock 10.
Detonation sensor test macro of the present utility model, wherein, frock 10 is cylindrical shape, the center on the surface of frock 10 is provided with the mounting hole 101 extended vertically downward.Acceleration sensor 4 is secured by bolts in the diapire of mounting hole 101, and the inwall of mounting hole 101 is provided with screw thread, so that detonation sensor 11 to be detected is fixed on frock 10 by screw thread.
When utilizing detonation sensor test system and test of the present utility model, at first in the situation that do not lay detonation sensor to be detected 11, the demarcation that utilizes dynamic signal analyzer 3 to carry out bumper 2.After demarcation completes, the energy of the actual output of bumper 2 each vibrations is identical.Then by detonation sensor to be detected 11, the screw thread by the inwall setting of mounting hole 101 is fixed on frock 10, makes the center of center, the bumper 2 of acceleration transducer 4, detonation sensor 11 center to be detected on the straight line of a upper surface perpendicular to bumper 2 21.
Then start dynamic signal analyzer 3 and bumper 2, dynamic signal analyzer 3 provides the vibration signal of a simulation to bumper 2.Along with the vibrations of bumper 2, detonation sensor 11 to be detected is to a series of the first feedback vibration signals of dynamic signal analyzer 3 feedbacks, and acceleration transducer 4 is to a series of the second feedback vibration signals of dynamic signal analyzer 3 feedbacks.Above-mentioned the first feedback vibration signal is current signal, above-mentioned the first feedback vibration signal through load circuit 6 be converted into voltage signal (unit is millivolt, mV) after, by dynamic signal analyzer 3, received.Above-mentioned the second feedback vibration signal is voltage signal, and above-mentioned second feeds back vibration signal is amplified rear by dynamically signal analyzer 3 receptions by charge amplifier 7.Dynamic signal analyzer 3 is scaled the actual accelerating force shaken of bumper 2 by above-mentioned the second feedback vibration signal, and (unit is acceleration of gravity, g).Dynamic signal analyzer 3 obtains a series of performance output valves by the above-mentioned voltage signal transformed through load circuit 6 divided by the accelerating force of above-mentioned bumper 2 actual vibrations, and (unit is the every acceleration of gravity of millivolt, mV/g).Dynamic signal analyzer 3 carries out Fourier transform by these a series of performance output valves, and (unit is KHz, KHz) to obtain a series of frequency values.If be worth corresponding performance output valve all in a certain scope 0 to the said frequencies in a certain frequency values scope, judgement treats that this detonation sensor is qualified, otherwise is judged to be defective.
Fig. 5 shows a kind of performance output valve of qualified detonation sensor and the corresponding oscillogram of frequency, and it meets: when frequency during at 5KHz, the performance output valve at 17mV/g in the 34mV/g scope; When frequency during at 8KHz, the performance output valve at 17mV/g in the 42.5mV/g scope; When frequency during at 13KHz, the performance output valve at 17mV/g in the 48.1mV/g scope; When frequency during at 18KHz, the performance output valve at 17mV/g in the 74mV/g scope.If all meeting above-mentioned condition with the corresponding oscillogram of frequency, the performance output valve of a certain detonation sensor judges that this detonation sensor is qualified, otherwise as shown in Figure 4, the performance output valve of detonation sensor can not fully all meet above-mentioned condition with the corresponding oscillogram of frequency, judges that detonation sensor is as defective.
Use detonation sensor test macro of the present utility model, can measure quickly and accurately the vibrations output performance of detonation sensor, to prevent that shaking the bad detonation sensor of output performance is installed on automobile, brings danger to driver and passenger.
Through measurement System Analysis, these vibrations test macro repeated and be 5.44% in linear result, the process control ability reaches 1.710.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (8)
1. a detonation sensor test macro, for detection of detonation sensor, is characterized in that, comprising:
For generation of the bumper that shakes and vibrations are passed to described detonation sensor;
For gathering the acceleration transducer of accelerating force of the actual vibrations of described bumper, be installed on described bumper, and be electrically connected to dynamic signal analyzer;
For sending the vibration test signal to described bumper and receiving respectively the first feedback vibration signal of described detonation sensor and the second feedback vibration signal of described acceleration transducer, and analyze the dynamic signal analyzer of described the first feedback signal and described the second feedback signal, with described acceleration transducer, described bumper, be electrically connected to respectively.
2. detonation sensor test macro according to claim 1, it is characterized in that, also comprise the load circuit for fictitious load, described load circuit makes the first feedback vibration signal of described detonation sensor change magnitude of voltage into, the input end of described load circuit is for being electrically connected to described detonation sensor, and the output terminal of described load circuit is electrically connected to described dynamic signal analyzer.
3. detonation sensor test macro according to claim 1, is characterized in that, described acceleration transducer is electrically connected to described dynamic signal analyzer by charge amplifier.
4. detonation sensor test macro according to claim 1, is characterized in that, described dynamic signal analyzer is electrically connected to computer, and described computer is for calculating, store, show the analysis result of described dynamic signal analyzer.
5. detonation sensor test macro according to claim 1, is characterized in that, described dynamic signal analyzer is electrically connected to described bumper by power amplifier.
6. according to the described detonation sensor test macro of claim 1-5 any one, it is characterized in that, the center of described acceleration transducer, the center of described bumper are all on a straight line perpendicular to the upper surface of described bumper.
7. detonation sensor test macro according to claim 6, it is characterized in that, also comprise that described frock is secured by bolts on described bumper for the frock of described acceleration transducer and described detonation sensor is installed, described acceleration transducer is fixed on described frock.
8. detonation sensor test macro according to claim 7, it is characterized in that, described frock is cylindrical shape, the center on the surface of described frock is provided with the mounting hole extended vertically downward, described acceleration sensor is secured by bolts in the diapire of described mounting hole, the inwall of described mounting hole is provided with screw thread, so that described detonation sensor is fixed on described frock by described screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320268613.4U CN203385511U (en) | 2013-05-16 | 2013-05-16 | Knock sensor test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320268613.4U CN203385511U (en) | 2013-05-16 | 2013-05-16 | Knock sensor test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203385511U true CN203385511U (en) | 2014-01-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320268613.4U Expired - Lifetime CN203385511U (en) | 2013-05-16 | 2013-05-16 | Knock sensor test system |
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| Country | Link |
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| CN (1) | CN203385511U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107806388A (en) * | 2016-09-09 | 2018-03-16 | 福特环球技术公司 | Method and system for detonation sensor reasonableness check |
-
2013
- 2013-05-16 CN CN201320268613.4U patent/CN203385511U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107806388A (en) * | 2016-09-09 | 2018-03-16 | 福特环球技术公司 | Method and system for detonation sensor reasonableness check |
| CN107806388B (en) * | 2016-09-09 | 2021-08-27 | 福特环球技术公司 | Method and system for knock sensor plausibility checking |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140108 |
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| CX01 | Expiry of patent term |