CN205225559U - Online spark discharge frequency detector of multichannel - Google Patents
Online spark discharge frequency detector of multichannel Download PDFInfo
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- CN205225559U CN205225559U CN201520862532.6U CN201520862532U CN205225559U CN 205225559 U CN205225559 U CN 205225559U CN 201520862532 U CN201520862532 U CN 201520862532U CN 205225559 U CN205225559 U CN 205225559U
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Abstract
The utility model discloses an online spark discharge frequency detector of multichannel aims at providing a spark frequency and detects stably, reads reliable data, on -line measuring device that can the interference elimination. The utility model discloses a following technical scheme realizes: ignition is through parallelly connected sampling circuit of sample cable and the 2nd sampling circuit, this two way sampling circuit adopts two tunnel frequency measurement passageways electricity to connect the isolation treatment circuit through frequency measurement passageway buffer circuit, it adopts two way electricity to connect the data processing control circuit equally to keep apart the treatment circuit, wherein keep apart the input electricity of treatment circuit and connect the photoelectric sensing head, self checking circuit and signal indication circuit, the display circuit is connected to data processing control circuit electricity, the prewired circuit, the power control circuit who connects power module, the sampling signal who is select by frequency measurement passageway buffer circuit sends into the data processing control circuit, detect through the prewired circuit and preset passageway and time, automatically connect ignition's power module, to calculate the frequency send the display circuit to show.
Description
Technical field
The utility model relates to the digital detection device of a kind of engine igniting system spark frequency, especially for the online sparkover frequency detector of Aero-Space engine igniting system multichannel.
Background technique
Aeroengine is the heart of aircraft, and aviation ignition system is one of vitals of aeroengine.Ignition system refers to the incendiary source system for main combustion chamber and tail pipe burner, direct current on aircraft or AC conversion are after high-tension electricity by it, release spark by firing cable and sparking plug and ensure to the enough energy of spark, the mixed gas of direct ignition engine burning indoor air and fuel oil.Engine igniting system spark frequency on-line checkingi is that the sparkover frequency by recording judges that whether engine igniting system is working properly.Current Aero-Space engine igniting system spark frequency on-line checkingi still adopts analog circut, with pointer display measurement result, its deficiency is: signal processing circuit is loaded down with trivial details, complicated, and rate of fault is high, maintenance difficult; Pointer low precision, adds manual read's fetch pointer number, causes test result error larger.
If analog circut on-line checkingi although structure can be simple, intuitively can show reading, effectively reduce error after adopting digital circuit on-line checkingi.But because Aero-Space engine igniting system is high voltage, big current signal that two-way exports simultaneously, large to digital circuit interference, read data unstable.How to use digital circuit to measure, eliminate interference, effective image data, becomes the problem that current aerospace airspace engine ignition system spark frequency detection technique is anxious to be resolved.
Model utility content
The purpose of this utility model is the deficiency existed for above-mentioned prior art, provides a kind of spark frequency to detect stable, reads data reliable, can eliminate the online sparkover frequency detector of multichannel of interference.
The utility model solves the technological scheme that its technical problem adopts: the online sparkover frequency detector of a kind of multichannel, comprise: by the ignition mechanism of high voltage cable electrical connection sparking plug and the frequency measurement channel separation circuit by the electrical connection of sampling cable, it is characterized in that: ignition mechanism is by sampling cable the first sample circuit in parallel and the second sample circuit, this two-way sample circuit adopts two-way frequency measurement passage electrical connection isolation processing circuit by frequency measurement channel separation circuit, isolation processing circuit adopts two-way to be electrically connected data processing and control circuit equally, wherein the input end of isolation processing circuit is electrically connected with optoelectronic induction head, self-checking circuit and signal indicating circuit, data processing and control circuit is electrically connected with display circuit, prewired circuit, connect the power control circuit of power module, ignition mechanism is by two-way online spark frequency numeral and the non-online spark frequency digital sampling circuit electrical connection frequency measurement channel separation circuit of a road photoelectricity, the sparking plug electric discharge electrical spark of ignition mechanism electrical connection is sampled, by the sampled signal of frequency measurement channel separation Electric circuit selection through the shaping of isolation processing circuit, data processing and control circuit is sent into after filtering, data processing and control circuit detects the preset of required frequency measurement passage and time by the prewired circuit of electrical connection and display circuit, the power module of automatic connection ignition mechanism, count in preset time, data processing and control circuit and power control circuit are respectively according to the preset time of prewired circuit, display circuit is sent to show calculated rate.
The utility model has following beneficial effect compared to prior art:
Spark frequency detects stable.The utility model adopts two-way online spark frequency digital test and the non-online spark frequency digital test of a road photoelectricity, improves the stability of aeroengine transistor type ignition system spark frequency.
Interference can be eliminated.Adopt the isolation processing circuit be electrically connected with self-checking circuit and optoelectronic induction head, can isolate and eliminate the interference that electrical spark high energy signal is measured selected frequency measurement channel frequence, the Spark plug optical fiber sensor frequency stabliltiy that the ignition system after isolation exports improves about 50%.
Simple to operate.The utility model data processing and control circuit and power control circuit are respectively according to the preset time of prewired circuit, the power module of automatic connection ignition mechanism, engine igniting system sparking plug electrical spark is sampled, selected detection frequency measurement passage sampling optical signal is converted to electrical signal, Aero-Space engine igniting system spark frequency is detected.
Reading data are reliable.The signal that the utility model is selected sends into data processing and control circuit after the shaping of isolation processing circuit, filtering, counts in preset time, send aobvious after calculated rate, display frequency data directly perceived.Under the standard atmosphere condition of test, spark frequency test error ± 0.1Hz, effectively reduces manually-operated error.
Accompanying drawing explanation
Further illustrate the utility model below in conjunction with drawings and Examples, but therefore the utility model is not limited among described scope of embodiments.
Fig. 1 is the schematic block circuit diagram of the online sparkover frequency detector of the utility model multichannel.
Fig. 2 is the program flow diagram of the built-in control software design of Fig. 1 numerical control processing circuit.
In figure, 1 ignition mechanism, 2 sampling cable, 3 first sample circuits, 4 second sample circuits, 5 frequency measurement channel separation circuit, 6 isolation processing circuit, 7 prewired circuits, 8 data processing and control circuit, 9 display circuits, 10 power modules, 11 power control circuits, 12 signal indicating circuits, 13 self-checking circuits, 14 optoelectronic induction heads, 15 sparking plugs, 16 high voltage cables.
Embodiment
Consult Fig. 1.In a most preferred embodiment described below, can be used for ignition mechanism 1, to the online sparkover frequency detector of multichannel that the spark frequency of sparking plug 15 detects, comprise: by the ignition mechanism of high voltage cable electrical connection sparking plug and the frequency measurement channel separation circuit by the electrical connection of sampling cable, wherein: ignition mechanism is by sampling cable the first sample circuit in parallel, second sample circuit, this two-way sample circuit adopts two paths electrical connection isolation processing circuit by frequency measurement channel separation circuit, isolation processing circuit adopts two-way to be electrically connected data processing and control circuit equally, wherein the input end of isolation processing circuit is electrically connected with optoelectronic induction head, self-checking circuit and signal indicating circuit, data processing and control circuit is electrically connected with display circuit, prewired circuit, connect the power control circuit of power module, ignition mechanism is by two-way online spark frequency numeral and the non-online spark frequency digital sampling circuit electrical connection frequency measurement channel separation circuit of a road photoelectricity, the sparking plug electric discharge electrical spark of ignition mechanism electrical connection is sampled, by the sampled signal of frequency measurement channel separation Electric circuit selection through the shaping of isolation processing circuit, data processing and control circuit is sent into after filtering, data processing and control circuit detects the preset of required frequency measurement passage and time by the prewired circuit of electrical connection and display circuit, the power module of automatic connection ignition mechanism, count in preset time, data processing and control circuit and power control circuit are respectively according to the preset time of prewired circuit, display circuit is sent to show calculated rate.The selected frequency measurement passage detected of frequency measurement channel separation circuit is that photoelectricity is online non-, non-for photoelectricity on-line period optical signal will be converted to electrical signal, data processing and control circuit is sent into after the shaping of isolation processing circuit, filtering, after signal indicating circuit Received signal strength, sample circuit samples selected detection frequency measurement passage, process and counting.
After powering on, self-inspection is carried out in the startup of self-checking circuit 13 pairs of engine igniting systems and detection device, confirms each detection position normal condition.Prewired circuit 7 and display circuit 9 complete and detect the preset of frequency measurement passage and detection time, start to detect.Data processing and control circuit 8 and power control circuit 11, respectively according to preset time, make ignition mechanism 1 automatically switch on power, and start normally to work.After signal indicating circuit 12 Received signal strength, sample circuit samples selected detection frequency measurement passage, process, counts.After preset time arrives, power control circuit 11 closes ignition mechanism 1 power supply automatically.Calculated rate send display circuit 9 to show by data processing and control circuit 8.
When spark frequency digital test online to engine igniting system multichannel, in detecting passage I, prewired circuit 7 and display circuit 9 respectively preset detection frequency measurement passage are the first sample circuit 3, and detection time, 10s, started to detect.By sampling cable 2, first sample circuit 3 and the second sample circuit 4, the online frequency measurement passage of required measurement ignition mechanism 1 is introduced detection device, data processing and control circuit 8 is selected according to frequency measurement channel presetting, by the signal of the second sample circuit 4, isolate through frequency measurement channel separation circuit 5, after attenuation processing, make it not affect the measurement of the first sample circuit 3 signal.First sample circuit 3 signal sends into data processing and control circuit 8 after isolation processing circuit 6 shaping, filtering, and meanwhile, signal indicating circuit 12 has pulse signal to indicate.Data processing and control circuit 8 counts within the 10s time that prewired circuit 7 is preset, send display circuit 9 to show the spark frequency value of the first sample circuit 3 after calculated rate.
In detecting passage II, prewired circuit 7 and display circuit 9 respectively preset detection frequency measurement passage are the second sample circuit 4, and detection time, 10s, started to detect.Ignition mechanism is by sampling cable 2, first sample circuit 3, second sample circuit 4, the online frequency measurement passage of required measurement ignition mechanism 1 is introduced detection device, data processing and control circuit 8 is selected according to frequency measurement channel presetting, by the signal of the first sample circuit 3, isolate through frequency measurement channel separation circuit 5, after attenuation processing, make it not affect the measurement of the second sample circuit 4 signal.Second sample circuit 4 signal sends into data processing and control circuit 8 after isolation processing circuit 6 shaping, filtering, and meanwhile, signal indicating circuit 12 has pulse signal to indicate.Data processing and control circuit 8 counts within the 10s time that prewired circuit 7 is preset, send display circuit 9 to show the spark frequency value of the second sample circuit 4 after calculated rate.
When online spark frequency digital test non-to engine igniting system, prewired circuit 7 and display circuit 9 respectively preset detection frequency measurement passage are sparking plug 15, and detection time, 10s, started to detect.Optoelectronic induction head 14 pairs of engine igniting system sparking plug 15 electrical spark are sampled, optical signal is converted to electrical signal, after isolation processing circuit 6 shaping, filtering, send into data processing and control circuit 8, meanwhile, provide pulse signal to indicate by signal indicating circuit 12.Data processing and control circuit 8 counts within the 10s time that prewired circuit 7 is preset, send the spark frequency value that display circuit 9 shows sparking plug 15 after calculated rate.
Consult Fig. 2.Numerical control processing circuit 8 is provided with control program software, and first control program software read and show preset frequency measurement channel bit and test time, judges whether engine igniting system starts, and does not start, and continues to read initialize data; Opening power control circuit after starting, opens ignition mechanism 1 power supply by power control circuit 11, whether is received the pulse signal of isolation processing circuit 6 output by signal monitoring, no signal, continues opening power, has signal, program starts timer, starts timer counter and step-by-step counting.Timer timing terminates, program stopped step-by-step counting, after sending the signal of closing ignition mechanism 1 power supply to powered-down control circuit 11, numerical control processing circuit 8 calculated rate, the umber of pulse that passage selected by frequency measurement channel separation circuit is gathered and being converted preset detection time, after calculating the frequency of measured pulse, the frequency measurement passage display place display corresponding to feeding, completes the digital test to engine igniting system spark frequency online.
Claims (3)
1. the online sparkover frequency detector of multichannel, comprise: by the ignition mechanism of high voltage cable electrical connection sparking plug and the frequency measurement channel separation circuit by the electrical connection of sampling cable, it is characterized in that: ignition mechanism is by sampling cable the first sample circuit in parallel and the second sample circuit, this two-way sample circuit adopts two-way frequency measurement passage electrical connection isolation processing circuit by frequency measurement channel separation circuit, isolation processing circuit adopts two-way to be electrically connected data processing and control circuit equally, wherein the input end of isolation processing circuit is electrically connected with optoelectronic induction head, self-checking circuit and signal indicating circuit, data processing and control circuit is electrically connected with display circuit, prewired circuit, connect the power control circuit of power module, ignition mechanism is by two-way online spark frequency numeral and the non-online spark frequency digital sampling circuit electrical connection frequency measurement channel separation circuit of a road photoelectricity, the sparking plug discharge spark of ignition mechanism electrical connection is sampled, by the sampled signal of frequency measurement channel separation Electric circuit selection through the shaping of isolation processing circuit, data processing and control circuit is sent into after filtering, data processing and control circuit detects the preset of required frequency measurement passage and time by the prewired circuit of electrical connection and display circuit, the power module of automatic connection ignition mechanism, count in preset time, data processing and control circuit and power control circuit are respectively according to the preset time of prewired circuit, display circuit is sent to show calculated rate.
2. the online sparkover frequency detector of multichannel as claimed in claim 1, it is characterized in that, frequency measurement channel separation circuit will be converted to electrical signal non-for photoelectricity on-line period optical signal, after the shaping of isolation processing circuit, filtering, send into data processing and control circuit.
3. the online sparkover frequency detector of multichannel as claimed in claim 1, is characterized in that, the online frequency measurement passage of required measurement ignition mechanism through the first sample circuit, the second sample circuit, is introduced detection device by sampling cable by ignition mechanism.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520862532.6U CN205225559U (en) | 2015-11-01 | 2015-11-01 | Online spark discharge frequency detector of multichannel |
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| CN201520862532.6U CN205225559U (en) | 2015-11-01 | 2015-11-01 | Online spark discharge frequency detector of multichannel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317613A (en) * | 2015-11-01 | 2016-02-10 | 四川泛华航空仪表电器有限公司 | Spark frequency online detection device for engine ignition system |
| CN106121829A (en) * | 2016-08-18 | 2016-11-16 | 四川泛华航空仪表电器有限公司 | The fault-preventing device of monitoring engine ignitor duty |
| CN106249128A (en) * | 2016-08-18 | 2016-12-21 | 四川泛华航空仪表电器有限公司 | The method of detection igniting system primary fault |
-
2015
- 2015-11-01 CN CN201520862532.6U patent/CN205225559U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317613A (en) * | 2015-11-01 | 2016-02-10 | 四川泛华航空仪表电器有限公司 | Spark frequency online detection device for engine ignition system |
| CN105317613B (en) * | 2015-11-01 | 2018-04-06 | 四川泛华航空仪表电器有限公司 | Engine igniting system spark frequency on-line measuring device |
| CN106121829A (en) * | 2016-08-18 | 2016-11-16 | 四川泛华航空仪表电器有限公司 | The fault-preventing device of monitoring engine ignitor duty |
| CN106249128A (en) * | 2016-08-18 | 2016-12-21 | 四川泛华航空仪表电器有限公司 | The method of detection igniting system primary fault |
| CN106249128B (en) * | 2016-08-18 | 2023-09-15 | 四川泛华航空仪表电器有限公司 | Method for detecting primary circuit fault of ignition device |
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