CN102589688A - Device and method for detecting arc ultraviolet spectrum by using complex programmable logic device (CPLD) - Google Patents
Device and method for detecting arc ultraviolet spectrum by using complex programmable logic device (CPLD) Download PDFInfo
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- CN102589688A CN102589688A CN2012100301349A CN201210030134A CN102589688A CN 102589688 A CN102589688 A CN 102589688A CN 2012100301349 A CN2012100301349 A CN 2012100301349A CN 201210030134 A CN201210030134 A CN 201210030134A CN 102589688 A CN102589688 A CN 102589688A
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Abstract
The invention discloses a device and a method for detecting arc ultraviolet spectrum by using a complex programmable logic device (CPLD). The method comprises the following steps that: a sensor signal input module which serves as a source of the whole arc detection system is used for converting an optical signal of ultraviolet into an electric signal; a sampling circuit acquires the electric signal for a sequential conditioning circuit; a signal conditioning module properly amplifies the signal acquired by the sampling circuit and pertinently filters the signal; a signal comparator compares the signal output by the signal conditioning module with a standard signal so as to acquire a square wave signal with a certain pulse width; an optical coupling isolating module is used for converting a signal output by a comparison circuit from a strong electric signal to a weak electric signal so as to completely isolate strong and weak electricity of the whole system; and a CPLD module is used for detecting the square wave signal and counting the number of pulses so as to detect an arc light signal for the system. Therefore, the problem that the traditional ultraviolet detection is long in response, inconvenient and high in cost is solved.
Description
Technical field
The present invention relates to low-voltage distribution arc protection field, especially the pick-up unit of low-voltage distribution arclight.
Background technology
The detection method of low-voltage distribution arclight mainly contains two kinds at present, detects the frequency spectrum of light intensity or light, and what the frequency spectrum of detection light adopted is the method that detects short wave ultraviolet.The traditional short wave ultraviolet detection relies on special-purpose photoelectric tube and spectrometer to combine, and can effectively reflect ultraviolet spectral characteristic, and reliability is high, can detect short wave ultraviolet through spectrometer.Its shortcoming is: the response time is long, has satisfied not the requirement of electric system quick-action property, and it is very constant to detect use through spectrometer, and price is very high.
Summary of the invention
One of technical matters to be solved by this invention provides a kind of device of realizing arc light ultraviolet ray frequency spectrum detection with CPLD, has solved long with inconvenient, that cost is high problem of traditional UV detection response time.
Two of technical matters to be solved by this invention provides a kind of method that realizes arc light ultraviolet ray frequency spectrum detection with CPLD, has solved long with inconvenient, that cost is high problem of traditional UV detection response time.
For one of solving the problems of the technologies described above; Technical scheme of the present invention is: a kind of device with CPLD realization arc light ultraviolet ray frequency spectrum detection, sensor signal load module, sample circuit, signal condition module, signal comparator, light-coupled isolation module and CPLD module; The signal that said sensor signal load module obtains is passed to said CPLD module through said sample circuit, signal condition module, signal comparator, light-coupled isolation module successively.
For solve the problems of the technologies described above two; Technical scheme of the present invention is: a kind ofly realize the dress method of arc light ultraviolet ray frequency spectrum detection with CPLD, based on hardware comprise sensor signal load module, sample circuit, signal condition module, signal comparator, light-coupled isolation module and CPLD module
Workflow is following:
(1) the sensor signal load module is the source of whole arc light detection system, is responsible for ultraviolet light signal is converted into electric signal;
(2) sample circuit comes out to supply the modulate circuit of back to use electrical signal collection;
(3) the signal condition module is carried out suitable amplification and is carried out filtering targetedly signal according to the signal of sample circuit collection;
(4) signal comparator compares the signal of signal condition module output and the signal of standard, obtains the square-wave signal of certain pulsewidth;
(5) light-coupled isolation module is responsible for the signal of comparator circuit output is become weak electric signal by the forceful electric power conversion of signals, and the strong and weak electricity of total system is isolated fully;
(6) the CPLD module is responsible for the detection of square-wave signal and the counting of pulse number, and the confession system detects arc optical signal and uses.
As improvement, the CPLD module is accomplished 8 road arc light step-by-step countings, and gate time is 1-10ms, and transmission interrupts giving the CPU of detection system when detecting arc optical signal, and the counting complement mark is put in the completion of opening entry pulse number counting automatically.
As improvement, CPU judges through the pulse number of CPLD record whether ultraviolet appearance is arranged.
The beneficial effect that the present invention is compared with prior art brought is:
(1) it is long to have solved the conventional low arc protection ultraviolet ray frequency spectrum detection response time, can not satisfy the problem of the requirement of electric system quick-action property.
(2) detection method greatly reduces the detection cost, and easy care exempts to regulate, and is easy to the user and uses.
Description of drawings
Fig. 1 is a function connection layout of the present invention.
Fig. 2 is for realizing the process flow diagram of UV detection.
Embodiment
Below in conjunction with Figure of description the present invention is described further.
As shown in Figure 1, a kind of device of realizing arc light ultraviolet ray frequency spectrum detection with CPLD comprises:
The sensor signal load module; The sensor signal load module is the source of whole arc light detection system, is responsible for ultraviolet light signal is converted into electric signal;
Sample circuit; Come out to supply the modulate circuit of back to use electrical signal collection;
The signal condition module; Signal according to sample circuit is gathered carries out suitable amplification and carries out filtering targetedly signal;
Signal comparator; The signal of signal condition module output and the signal of standard are compared, obtain the square-wave signal of certain pulsewidth;
The light-coupled isolation module; Be responsible for the signal of comparator circuit output is become weak electric signal by the forceful electric power conversion of signals, the strong and weak electricity of total system is isolated fully;
The CPLD module; Be responsible for the detection of square-wave signal and the counting of pulse number, the confession system detects arc optical signal and uses.
Through converting light signal to electric signal intuitively, be convenient to the realization of detection scheme with upper module.
As shown in Figure 2; The CPLD module is accomplished 8 road arc light step-by-step countings, and gate time is 5ms (can change to 1-10ms according to actual conditions, through the data bus setting-up time); Transmission interrupts giving CPU when detecting arc optical signal, and the counting complement mark is put in the completion of opening entry pulse number counting automatically.
The explanation of interrupt module
(1) generation of interrupting
This functional module is interrupted according to arc light detection case record; If arc light 1-arc light 8 respectively corresponding arc1_int-arc8_int 8 road arc lights take place; Produce 8 the tunnel respectively and interrupt Arc1_int-Arc8_int, as long as total interrupt register correspondence position 1,8 tunnel interruptions simultaneously have a look-at-me Arc_int who look-at-me will produce to receive to CPU.
(2) removing of interrupting
This function is used for removing interrupts;, CPU interrupts removing automatically when reading the Arc1_counter-Arc8_counter register value; CPU does not read the value of corresponding Arc1_counter-Arc8_counter register always if arc1_int-arc8_int produces; It is the square-wave signal of 37.5K that total look-at-me Arc_int can provide frequency always, loses to prevent interruption.If the value of Arc1_counter-Arc8_counter register is useless, the value that reads through the Arc1_counter-Arc8_counter register is again lost and is got final product, and the arc light of respective channel can be removed like this.
CPU judges through the pulse number of CPLD record whether ultraviolet appearance is arranged, and only needs 1ms the shortest detection time, can effectively satisfy the requirement of protecting electrical power system reliability and quick-action property.
Claims (4)
1. a device of realizing arc light ultraviolet ray frequency spectrum detection with CPLD is characterized in that: sensor signal load module, sample circuit, signal condition module, signal comparator, light-coupled isolation module and CPLD module; The signal that said sensor signal load module obtains is passed to said CPLD module through said sample circuit, signal condition module, signal comparator, light-coupled isolation module successively.
2. dress method that realizes arc light ultraviolet ray frequency spectrum detection with CPLD is characterized in that: based on hardware comprise sensor signal load module, sample circuit, signal condition module, signal comparator, light-coupled isolation module and CPLD module;
(1) the sensor signal load module is the source of whole arc light detection system, is responsible for ultraviolet light signal is converted into electric signal;
(2) sample circuit comes out to supply the modulate circuit of back to use electrical signal collection;
(3) the signal condition module is carried out suitable amplification and is carried out filtering targetedly signal according to the signal of sample circuit collection;
(4) signal comparator compares the signal of signal condition module output and the signal of standard, obtains the square-wave signal of certain pulsewidth;
(5) light-coupled isolation module is responsible for the signal of comparator circuit output is become weak electric signal by the forceful electric power conversion of signals, and the strong and weak electricity of total system is isolated fully;
(6) the CPLD module is responsible for the detection of square-wave signal and the counting of pulse number, and the confession system detects arc optical signal and uses.
3. a kind of dress method that realizes arc light ultraviolet ray frequency spectrum detection with CPLD according to claim 2; It is characterized in that: the CPLD module is accomplished 8 road arc light step-by-step countings; Gate time is 1-10ms; Transmission interrupts giving the CPU of detection system when detecting arc optical signal, and the counting complement mark is put in the completion of opening entry pulse number counting automatically.
4. a kind of dress method that realizes arc light ultraviolet ray frequency spectrum detection with CPLD according to claim 3, it is characterized in that: CPU judges through the pulse number of CPLD record whether ultraviolet appearance is arranged.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100301349A CN102589688A (en) | 2012-02-10 | 2012-02-10 | Device and method for detecting arc ultraviolet spectrum by using complex programmable logic device (CPLD) |
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| CN2012100301349A CN102589688A (en) | 2012-02-10 | 2012-02-10 | Device and method for detecting arc ultraviolet spectrum by using complex programmable logic device (CPLD) |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879092A (en) * | 2012-08-29 | 2013-01-16 | 昆山书豪仪器科技有限公司 | Direct-reading spectral signal acquisition circuit of combining analog filtering with digital integration |
| CN103217635A (en) * | 2013-05-03 | 2013-07-24 | 上海理工大学 | Ultraviolet detection equipment with partial discharge function |
| CN103633992A (en) * | 2013-11-20 | 2014-03-12 | 中国船舶重工集团公司第七一六研究所 | Alternating current-direct current analog signal effective value conversion and linear optical wide-temperature conditioning circuit |
| CN104330156A (en) * | 2014-10-22 | 2015-02-04 | 国家电网公司 | Electric welding arc light intensity detection device and method |
| CN105093078A (en) * | 2015-08-25 | 2015-11-25 | 上海理工大学 | Generator stator winding partial discharge ultraviolet detection device |
-
2012
- 2012-02-10 CN CN2012100301349A patent/CN102589688A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879092A (en) * | 2012-08-29 | 2013-01-16 | 昆山书豪仪器科技有限公司 | Direct-reading spectral signal acquisition circuit of combining analog filtering with digital integration |
| CN103217635A (en) * | 2013-05-03 | 2013-07-24 | 上海理工大学 | Ultraviolet detection equipment with partial discharge function |
| CN103217635B (en) * | 2013-05-03 | 2016-03-23 | 上海理工大学 | A kind of shelf depreciation uv detection devices |
| CN103633992A (en) * | 2013-11-20 | 2014-03-12 | 中国船舶重工集团公司第七一六研究所 | Alternating current-direct current analog signal effective value conversion and linear optical wide-temperature conditioning circuit |
| CN103633992B (en) * | 2013-11-20 | 2016-03-30 | 中国船舶重工集团公司第七一六研究所 | The RMS-DC converter of alternating current-direct current analog signal and linear optical isolation wide-temperature modulate circuit |
| CN104330156A (en) * | 2014-10-22 | 2015-02-04 | 国家电网公司 | Electric welding arc light intensity detection device and method |
| CN105093078A (en) * | 2015-08-25 | 2015-11-25 | 上海理工大学 | Generator stator winding partial discharge ultraviolet detection device |
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Application publication date: 20120718 |