CN104198826A - Pulse signal detection system, method and particle counter - Google Patents
Pulse signal detection system, method and particle counter Download PDFInfo
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- CN104198826A CN104198826A CN201410487531.8A CN201410487531A CN104198826A CN 104198826 A CN104198826 A CN 104198826A CN 201410487531 A CN201410487531 A CN 201410487531A CN 104198826 A CN104198826 A CN 104198826A
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Abstract
The invention provides a pulse signal detection system, method and a particle counter. The detection system is connected to a sensor and comprises a differential amplifier circuit, an integral amplifying circuit, a pulse signal shaping circuit and a processor. The differential amplifier circuit is connected to the sensor and is used for filtering and amplifying signals outputted by the sensor; the integral amplifying circuit is connected to the differential amplifier circuit and is used for performing wave amplification on the filtered and amplified signals; the pulse signal shaping circuit is connected to the differential amplifier circuit and is used for processing the signals after the wave amplification and generating square wave pulse signals; the processor is connected to the pulse signal shaping circuit and is used for identifying and measuring the square wave pulse signals. Since the signals are easy to identify, the requirements on a subsequent processor are lowered, the processor with ultra high accuracy is omitted, and the amplitude of the processor identification is lowered. Thus, the cost of the subsequent processor can be lowered.
Description
Technical field
The present invention relates to measure detection technique field, particularly a kind of pulse signal detection system, method and corpuscular counter.
Background technology
At present, the signal major part of sensor output is that frequency ratio is higher, and random spiking, shown in Figure 1.The randomness of sort signal is more intense, and the time of pulse is short, and pulse width is narrower, and the peak amplitude duration is less than 1us, and signal amplitude is faint etc.These features cause the follow-up extraction to sensor output signal to bring a series of difficulty, need to identify rapidly in a short period of time feature amplitude and the time span etc. of each spiking.
In prior art, normally first the signal of sensor output is amplified to processing, then the signal after amplifying is extracted.As shown in Figure 2, the original signal that sensor 100 is exported, after amplification module 200 amplifies processing, is exported to processor 300 by the signal after amplifying.
As shown in Figure 3, a in Fig. 3 is the original signal of sensor output to the signal waveform corresponding with Fig. 2, and the b in Fig. 3 is the signal after the amplification of amplification module output.
Although the b in Fig. 3 is the signal after amplifying, the spike width of signal is still very narrow, and the duration is very short, just very high for the requirement of processor like this, need processor at extremely short time IT the signal to point the highest on spike, i.e. amplitude.If catch the amplitude less than this spike, the so current shape information detecting will be wrong.So just need the processing speed of processor very fast, will increase the cost of processor.In addition, require also highlyer for AD, while having the amplitude of individual spike too large, the sample range of AD is limited, cannot collect the signal of the amplitude that exceedes its sample range.
In sum, current signal processing mode, higher to the requirement of processor on the one hand, may not reach sampling request by AD on the other hand yet.Cause some loss of signal of collection, or there is the situations such as form mistake in some signal.
Therefore, those skilled in the art need to provide a kind for the treatment of circuit of sensor output signal, can accurately collect all signals, do not go out active or wrong situation, and lower to the requirement of processor.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of pulse signal detection system, method and corpuscular counter, can accurately capture the signal of sensor output, and to processor require low.
The invention provides a kind of pulse signal detection system, be connected in a sensor, this pulse signal detection system comprises: differential amplifier circuit, integrating amplification circuit, pulse signal shaping circuit and processor;
Described differential amplifier circuit, is connected in described sensor, and described differential amplifier circuit is for carrying out filter amplifying processing by the signal of sensor output;
Described integrating amplification circuit, is connected in described differential amplifier circuit, and described integrating amplification circuit amplifies processing for the signal after filter and amplification being carried out to waveform;
Described pulse signal shaping circuit, is connected in described integrating amplification circuit, and described pulse signal shaping circuit is processed for the signal after waveform is amplified, and generates square-wave pulse signal;
Described processor, is connected in described pulse signal shaping circuit, and described processor is for identifying and measure this square-wave pulse signal.
Preferably, described integrating amplification circuit comprises: operational amplifier, the first resistance, the second resistance and the first electric capacity;
Described operational amplifier has first input end, the second input end and output terminal, and the first input end of described operational amplifier connects described differential amplifier circuit, and described first input end receives the pulse signal after described filter and amplification,
The output terminal of described operational amplifier connects described pulse signal shaping circuit;
The second input end of described operational amplifier is by described the first resistance eutral grounding;
The second input end of described operational amplifier connects the output terminal of described amplifier by described the second resistance;
Described the first Capacitance parallel connection is at the two ends of described the second resistance.
Preferably, this system also comprises high-frequency filter capacitor;
Described high-frequency filter capacitor is connected between described differential amplifier circuit and described integrating amplification circuit.
Preferably, this system also comprises: compensating circuit;
Described compensating circuit is connected in the first input end of described operational amplifier, for described integrating amplification circuit is compensated to offset voltage.
Preferably, described compensating circuit comprises: the 3rd resistance, the 4th resistance and adjustable resistance;
The first input end of described operational amplifier is by described the 4th resistance eutral grounding;
One end of described adjustable resistance connects a power supply, the other end ground connection of described adjustable resistance, and the adjustable side of described adjustable resistance is connected in the first input end of described operational amplifier by described the 3rd resistance.
Preferably, described pulse signal shaping circuit comprises: comparer, the 5th resistance, the 6th resistance and the 3rd filter capacitor fast;
Described quick comparer has first input end, the second input end and output terminal,
The first input end of described quick comparer connects described integrating amplification circuit;
The second input end of described quick comparer is by described the 6th resistance eutral grounding;
Described the 3rd filter capacitor is connected in parallel on the two ends of described the 6th resistance;
The second input end of described quick comparer connects a power supply by described the 5th resistance;
The output terminal of described quick comparer is connected in described processor.
The embodiment of the present invention also provides a kind of low cost to realize the method that pulse signal accurately detects fast, is applied to the content that detects particulate in air, comprises the following steps:
Receive the signal of photoinduction sensor output;
Described signal is carried out to differential and amplify processing;
Differential is amplified to signal after treatment and carry out integration amplification processing;
Integration is amplified to signal after treatment and carry out shaping pulse, obtain pulse signal;
Pulse signals is identified and is measured, and obtains the content of particulate in air.
Preferably, also comprise:
Described differential is amplified to signal after treatment and carry out filtering processing, filtering signal after treatment is just carried out to described integration and amplify processing.
The embodiment of the present invention also provides a kind of corpuscular counter, comprising: photoinduction sensor and described pulse signal detection system;
Described photoinduction sensor, for responding to the existence of particulate in air;
Described pulse signal detection system, for receiving the signal of described photoinduction sensor output, described signal is first carried out to filter amplifying processing by differential amplifier circuit, then carry out waveform through integrating amplification circuit and amplify processing, carry out again pulse signal Shape correction, pulse signal after utilizing processor to shaping is identified and is measured, and draws the content of particulate in air.
Preferably, described photoinduction sensor is photodiode.
Compared with prior art, the present invention has the following advantages:
The pulse signal detection system that the present embodiment provides, has carried out twice amplification to the signal of sensor output, and amplifying is for the first time to amplify by differential, is to amplify by integration for the second time, and the amplitude of the signal after twice amplification is significantly improved.Because the time width of spiking is less, be still not easy identification, in the present embodiment, again spiking is become to pulse signal like this, the time span of signal is widened like this, is follow-uply easily identified.Because signal has easily been identified, therefore the requirement of subsequent treatment device is reduced, do not need the super high processor of precision, the amplitude of processor identification has also been reduced.Therefore, can reduce the cost of subsequent treatment device.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the spiking schematic diagram of sensor output;
Fig. 2 is the processing schematic diagram to sensor output signal of the prior art;
Fig. 3 is the schematic diagram of the spiking shown in Fig. 1 after amplifying;
Fig. 4 is pulse signal detection system schematic provided by the invention;
Fig. 5 is the oscillogram of the present invention for signal processing;
Fig. 6 is pulse signal detection system embodiment two schematic diagram provided by the invention;
Fig. 7 is pulse signal detection system embodiment three schematic diagram provided by the invention;
Fig. 8 is that low cost provided by the invention realizes embodiment of the method one process flow diagram that pulse signal accurately detects fast;
Fig. 9 is corpuscular counter embodiment mono-schematic diagram provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
System embodiment one:
Referring to Fig. 4, this figure is pulse signal detection system schematic provided by the invention.
The pulse signal detection system that the present embodiment provides, comprising: differential amplifier circuit 200a, integrating amplification circuit 200b, pulse signal shaping circuit 200c and processor 300;
Described differential amplifier circuit 200a, is connected in described sensor, carries out filter amplifying processing for the signal that sensor 100 is exported;
It should be noted that, described differential amplifier circuit 200a belongs to prior art, in prior art, be exactly directly to carry out subsequent acquisition processing after utilizing signal that differential amplifier circuit is exported sensor 100 once to amplify, for example enter processor 300, or enter AD converter (not shown).The signal of exporting from differential amplifier circuit 200a is as shown in the b Fig. 5.
Described integrating amplification circuit 200b, is connected in described differential amplifier circuit, amplifies processing for the signal after filter and amplification being carried out to waveform;
The signal of integrating amplification circuit 200b after to filter and amplification carries out secondary and amplifies and process, and the amplitude of signal that like this can be through secondary amplifies after is elongated, and amplitude becomes greatly, shown in c as shown in Figure 5.The follow-up processor 300 of being convenient to is identified, thus identification signal amplitude preferably.
Described pulse signal shaping circuit 200c, is connected in described integrating amplification circuit, processes for the signal after waveform is amplified, and generates square-wave pulse signal.
Described processor 300, is connected in described pulse signal shaping circuit 200c, and described processor 300 is for identifying and measure this square-wave pulse signal.
Because the time span of spiking is wider, be not easy to gather, for time span is elongated, width widens, and has added pulse signal shaping circuit 200c in the present embodiment, spiking is become to the pulse signal of square wave form, shown in d as shown in Figure 5.
What processor 300 was processed like this is exactly the square-wave pulse signal shown in d, and no matter signal such for processor still all can be identified from amplitude from time span.
Be understandable that, the pulse width of this pulse signal changes, and frequency changes, because the signal of sensor measurement is real-time change.
The pulse signal detection system that the present embodiment provides, has carried out twice amplification to the signal of sensor output, and amplifying is for the first time to amplify by differential, is to amplify by integration for the second time, and the amplitude of the signal after twice amplification is significantly improved.Because the time width of spiking is less, be still not easy identification, in the present embodiment, again spiking is become to pulse signal like this, the time span of signal is widened like this, is follow-uply easily identified.Because signal has easily been identified, therefore the requirement of subsequent treatment device is reduced, do not need the super high processor of precision, the amplitude of processor identification has also been reduced.Therefore, can reduce the cost of subsequent treatment device.
It should be noted that, especially effect is remarkable in the identification of pulse signal detection system applies particle in air that the present embodiment provides.Because environmental pollution is more and more serious, therefore, need to identify the content of particulate in air.The sensor that the content of identification particulate in air uses is laser sensor.The signal of laser sensor output is fainter, therefore, need to carry out subsequent treatment to the signal of this sensor output more difficult.The amplitude of the spiking detecting represents the size of particulate in air, and the volume of the larger expression particle of amplitude is larger.The frequency of spiking is higher, and signal is more intensive, illustrates that the number of particulate in air is more.The treatment circuit that application the present embodiment provides can be applied in the processing of sensor output signal of particle identification, and higher to the requirement of processor like this, cost compare is low, has the great significance for popularization.
System embodiment two:
Referring to Fig. 6, this figure is pulse signal detection system embodiment two schematic diagram provided by the invention.
How in the present invention, introduce integrating circuit and the pulse signal shaping circuit that physical circuit figure introduces in the application in detail realizes.
The integrating amplification circuit that the present embodiment provides comprises: operational amplifier 308, the first resistance 303, the second resistance 307 and the first electric capacity 306;
Described operational amplifier 308 has first input end, the second input end and output terminal, and the first input end of described operational amplifier 308 connects described differential amplifier circuit 200a.
The output terminal of described differential amplifier circuit 200a connects the first input end of described operational amplifier 308;
The output terminal of described operational amplifier 308 connects the input end of described pulse signal shaping circuit;
The second input end of described operational amplifier 308 is by described the first resistance 303 ground connection;
The second input end of described operational amplifier 308 connects the output terminal of described amplifier 308 by described the second resistance 307;
Described the first electric capacity 306 is connected in parallel on the two ends of described the second resistance 307.
It should be noted that, the effect of the first electric capacity 306 is filtering, filtering noise signal.
The treatment circuit of the sensor output signal that the present embodiment provides, also comprises high-frequency filter circuit;
Described high-frequency filter circuit is connected between the output terminal of described differential amplifier circuit 200a and the first input end of described amplifier.
Described high-frequency filter circuit is ceramic condenser 313;
One end of described ceramic condenser 313 connects the output terminal of described differentiating circuit, and the other end of described ceramic condenser 313 connects the first input end of described amplifier 308.
Ceramic condenser 313 can carry out filtering by high-frequency interferencing signal.
It should be noted that, the effect of ceramic condenser 313 is the invalid noise signals in filter out power.
After utilizing integrating amplification circuit to carry out secondary amplification to signal, the amplitude of signal can be amplified again.
Extract afterwards after filtering signal characteristic, more give prominence to (amplitude is larger) because useful signal is exaggerated, can make like this extraction of signal become simpler, measurement result is more accurate.
Introduce the principle of work of pulse signal shaping circuit below.
Described pulse signal shaping circuit comprises: comparer 312, the 5th resistance, the 6th resistance and the 3rd filter capacitor fast;
Described quick comparer 312 has first input end, the second input end and output terminal;
The first input end of described quick comparer 312 connects the output terminal of described amplifier 308;
The second input end of described quick comparer 312 is by described the 6th resistance 311 ground connection;
The second input end of described quick comparer 312 is by described the 3rd filter capacitor 310 ground connection;
The second input end of described quick comparer 312 connects power supply by described the 5th resistance 309;
The output terminal of described quick comparer 312 connects described processor, and the output terminal of comparer 312 directly connects processor fast.
Be understandable that, the signal that the second input end of described quick comparer 312 connects is as with reference to voltage, signal and the reference voltage of the first input end of described quick comparer 312 compare, thereby the output terminal of comparer 312 overturns fast, and then produce pulse signal.
Owing to becoming after pulse signal, the peak velocity that catches pulse signal can be accelerated, and does not need to carry out complicated data and calculates, and relatively show that maximal value is peak value.Therefore, in the present embodiment, change the identification that is more conducive to signal after pulse signal into.
System embodiment three:
Referring to Fig. 7, this figure is pulse signal detection system embodiment three schematic diagram provided by the invention.
The pulse signal detection system that the present embodiment provides, also comprises: linear compensation circuit;
Described linear compensation circuit is connected in the first input end of described amplifier 312, for the signal of integrating amplification circuit is carried out to linear compensation.
Described linear compensation circuit comprises: the 3rd resistance 304, the 4th resistance 305 and the 7th resistance 302;
Described the 7th resistance 302 is adjustable resistance;
The first input end of described amplifier 312 is by described the 4th resistance 305 ground connection;
The first input end of described amplifier 312 connects the adjustable side of described adjustable resistance 302 by described the 3rd resistance 304;
It should be noted that, the 4th resistance 304 and the 5th resistance 305 form resistance wave filter, for filtering noise signal.
The first end of described adjustable resistance 302 connects power supply, the second end ground connection of described adjustable resistance 302;
The first input end of described amplifier 312 is connected power supply by described the 4th resistance 305 of series connection with the 7th resistance 302.
It should be noted that, described adjustable resistance 302 is adjustable precision resistor.
By the offset voltage that regulates adjustable precision resistance 302 can compensator-amplifier unit 312 to input, for example, the input end of amplifier 312 is 0 o'clock, output terminal may not be 0, for the linearity of compensator-amplifier unit, input and output is kept consistency, therefore, in the present embodiment, designed linear compensation circuit.For example, when amplifier is input as 0.1mV, output is just 0V.
Preferably, described the 3rd filter capacitor 310 is ceramic condenser.
Preferably, described amplifier 308 is precision operational-amplifier.
In the present embodiment, owing to having reduced sampling precision to hardware and the requirement of sample rate, therefore use common processor just can carry out identification and the extraction of signal, therefore can reduce costs.
Embodiment of the method one:
Referring to Fig. 8, this figure is that low cost provided by the invention realizes embodiment of the method one process flow diagram that pulse signal accurately detects fast.
The low cost that the present embodiment provides realizes the method that pulse signal accurately detects fast, is applied to the content that detects particulate in air, comprises the following steps:
S801: the signal that receives the output of photoinduction sensor;
It should be noted that, the signal of photoinduction sensor output is very faint, and follow-up being not easy collects, and therefore, need to process the signal of sensor output.
S802: described signal is carried out to differential and amplify processing;
It is mainly that signal is carried out to filter and amplification that differential amplifies processing, and signal amplitude increases.
S803: differential is amplified to signal after treatment and carry out integration amplification processing;
It is mainly the lifting of amplitude that signal is carried out that integration amplifies, and further promotes signal amplitude and time span.
S804: integration is amplified to signal after treatment and carry out shaping pulse, obtain pulse signal;
Easily be identified and gather because pulse signal is follow-up, avoiding too little some signals collecting of time span less than being lost.
S805: pulse signals is identified and measured, obtains the content of particulate in air.
The method that the present embodiment provides, signal to sensor output has carried out twice amplification processing, amplifying is for the first time to amplify by differential, it is mainly filter and amplification, be that to amplify by integration be mainly that amplitude and time span amplify for the second time, the amplitude of the signal after twice amplification is significantly improved.Because the time width of spiking is less, be still not easy identification, in the present embodiment, again spiking is become to pulse signal like this, the time span of signal is widened like this, is follow-uply easily identified.Because signal has easily been identified, therefore the requirement of subsequent treatment device is reduced, do not need the super high processor of precision, the amplitude of processor identification has also been reduced.Therefore, can reduce the cost of subsequent treatment device.
In addition, the method that the embodiment of the present invention provides, further comprising the steps of:
Described differential is amplified to signal after treatment and carry out filtering processing, filtering signal after treatment is just carried out to described integration and amplify processing.
Corpuscular counter embodiment mono-:
Referring to Fig. 9, this figure is corpuscular counter embodiment mono-schematic diagram provided by the invention.
The corpuscular counter that the present embodiment provides, comprising: photoinduction sensor 100 and described pulse signal detection system 1000;
Described photoinduction sensor 100, for responding to the existence of particulate in air;
It should be noted that, the signal of photoinduction sensor output is very faint, and follow-up being not easy collects, and therefore, need to process the signal of sensor output.
Described pulse signal detection system 1000, for receiving the signal of described photoinduction sensor output, described signal is first carried out to filter amplifying processing by differential amplifier circuit, then carry out waveform through integrating amplification circuit and amplify processing, carry out again pulse signal Shape correction, pulse signal after utilizing processor to shaping is identified and is measured, and draws the content of particulate in air.
It is mainly that signal is carried out to filter and amplification that differential amplifies processing, and signal amplitude increases.
It is mainly the lifting of amplitude that signal is carried out that integration amplifies, and further promotes signal amplitude and time span.
Easily be identified and gather because pulse signal is follow-up, avoiding too little some signals collecting of time span less than being lost.
The corpuscular counter that the present embodiment provides, signal to sensor output has carried out twice amplification processing, amplifying is for the first time to amplify by differential, it is mainly filter and amplification, be that to amplify by integration be mainly that amplitude and time span amplify for the second time, the amplitude of the signal after twice amplification is significantly improved.Because the time width of spiking is less, be still not easy identification, in the present embodiment, again spiking is become to pulse signal like this, the time span of signal is widened like this, is follow-uply easily identified.Because signal has easily been identified, therefore the requirement of processor is reduced, do not need the super high processor of precision, the amplitude of processor identification has also been reduced.Therefore, can reduce the cost of subsequent treatment device, thereby reduce the cost of whole corpuscular counter.
It should be noted that, the specific implementation of pulse signal detection system can be referring to the embodiment of above-mentioned detection system.
Be understandable that, in corpuscular counter, described photoinduction sensor can adopt photodiode to realize, and light signal is converted to electric signal.The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction.Although the present invention discloses as above with preferred embodiment, but not in order to limit the present invention.Any those of ordinary skill in the art, do not departing from technical solution of the present invention scope situation, all can utilize method and the technology contents of above-mentioned announcement to make many possible variations and modification to technical solution of the present invention, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not depart from technical solution of the present invention,, all still belongs in the scope of technical solution of the present invention protection any simple modification made for any of the above embodiments, equivalent variations and modification according to technical spirit of the present invention.
Claims (10)
1. a pulse signal detection system, is connected in a sensor, it is characterized in that, this pulse signal detection system comprises: differential amplifier circuit, integrating amplification circuit, pulse signal shaping circuit and processor;
Described differential amplifier circuit, is connected in described sensor, and described differential amplifier circuit is for carrying out filter amplifying processing by the signal of sensor output;
Described integrating amplification circuit, is connected in described differential amplifier circuit, and described integrating amplification circuit amplifies processing for the signal after filter and amplification being carried out to waveform;
Described pulse signal shaping circuit, is connected in described integrating amplification circuit, and described pulse signal shaping circuit is processed for the signal after waveform is amplified, and generates square-wave pulse signal;
Described processor, is connected in described pulse signal shaping circuit, and described processor is for identifying and measure this square-wave pulse signal.
2. pulse signal detection system according to claim 1, is characterized in that, described integrating amplification circuit comprises: operational amplifier, the first resistance, the second resistance and the first electric capacity;
Described operational amplifier has first input end, the second input end and output terminal, and the first input end of described operational amplifier connects described differential amplifier circuit, and described first input end receives the pulse signal after described filter and amplification,
The output terminal of described operational amplifier connects described pulse signal shaping circuit;
The second input end of described operational amplifier is by described the first resistance eutral grounding;
The second input end of described operational amplifier connects the output terminal of described amplifier by described the second resistance;
Described the first Capacitance parallel connection is at the two ends of described the second resistance.
3. pulse signal detection system according to claim 2, is characterized in that, this system also comprises high-frequency filter capacitor;
Described high-frequency filter capacitor is connected between described differential amplifier circuit and described integrating amplification circuit.
4. pulse signal detection system according to claim 2, is characterized in that, this system also comprises: compensating circuit;
Described compensating circuit is connected in the first input end of described operational amplifier, for described integrating amplification circuit is compensated to offset voltage.
5. pulse signal detection system according to claim 4, is characterized in that, described compensating circuit comprises: the 3rd resistance, the 4th resistance and adjustable resistance;
The first input end of described operational amplifier is by described the 4th resistance eutral grounding;
One end of described adjustable resistance connects a power supply, the other end ground connection of described adjustable resistance, and the adjustable side of described adjustable resistance is connected in the first input end of described operational amplifier by described the 3rd resistance.
6. pulse signal detection system according to claim 1, is characterized in that, described pulse signal shaping circuit comprises: comparer, the 5th resistance, the 6th resistance and the 3rd filter capacitor fast;
Described quick comparer has first input end, the second input end and output terminal,
The first input end of described quick comparer connects described integrating amplification circuit;
The second input end of described quick comparer is by described the 6th resistance eutral grounding;
Described the 3rd filter capacitor is connected in parallel on the two ends of described the 6th resistance;
The second input end of described quick comparer connects a power supply by described the 5th resistance;
The output terminal of described quick comparer is connected in described processor.
7. low cost realizes the method that pulse signal accurately detects fast, it is characterized in that, is applied to the content that detects particulate in air, comprises the following steps:
Receive the signal of photoinduction sensor output;
Described signal is carried out to differential and amplify processing;
Differential is amplified to signal after treatment and carry out integration amplification processing;
Integration is amplified to signal after treatment and carry out shaping pulse, obtain pulse signal;
Pulse signals is identified and is measured, and obtains the content of particulate in air.
8. low cost according to claim 7 realizes the method that pulse signal accurately detects fast, it is characterized in that, also comprises:
Described differential is amplified to signal after treatment and carry out filtering processing, filtering signal after treatment is just carried out to described integration and amplify processing.
9. a corpuscular counter, is characterized in that, comprising: the pulse signal detection system described in photoinduction sensor and claim 1-6 any one;
Described photoinduction sensor, for responding to the existence of particulate in air;
Described pulse signal detection system, for receiving the signal of described photoinduction sensor output, described signal is first carried out to filter amplifying processing by differential amplifier circuit, then carry out waveform through integrating amplification circuit and amplify processing, carry out again pulse signal Shape correction, pulse signal after utilizing processor to shaping is identified and is measured, and draws the content of particulate in air.
10. corpuscular counter according to claim 9, is characterized in that, described photoinduction sensor is photodiode.
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| CN108333440A (en) * | 2017-12-30 | 2018-07-27 | 聚光科技(杭州)股份有限公司 | pulse detecting method and device |
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| CN108333440A (en) * | 2017-12-30 | 2018-07-27 | 聚光科技(杭州)股份有限公司 | pulse detecting method and device |
| CN109471014A (en) * | 2018-10-30 | 2019-03-15 | 江苏赛诺格兰医疗科技有限公司 | A kind of detectable signal simulation forming circuit and detector board test platform |
| CN109471014B (en) * | 2018-10-30 | 2021-01-19 | 江苏赛诺格兰医疗科技有限公司 | Detection signal simulation forming circuit and detector board card test platform |
| CN109342285A (en) * | 2018-11-27 | 2019-02-15 | 广州勒夫迈智能科技有限公司 | A kind of particle detection technique of infrared emission |
| CN109342285B (en) * | 2018-11-27 | 2024-04-30 | 广州勒夫迈智能科技有限公司 | Infrared correlation particle detection method |
| CN113484617A (en) * | 2021-09-07 | 2021-10-08 | 湖北方圆环保科技有限公司 | Pulse amplitude acquisition device and pulse amplitude acquisition method |
| CN113484617B (en) * | 2021-09-07 | 2021-11-23 | 湖北方圆环保科技有限公司 | Pulse amplitude acquisition device and pulse amplitude acquisition method |
| CN114200287A (en) * | 2021-12-06 | 2022-03-18 | 广东利扬芯片测试股份有限公司 | Pulse waveform processing circuit of dTof chip |
| CN114200287B (en) * | 2021-12-06 | 2024-03-29 | 广东利扬芯片测试股份有限公司 | Pulse waveform processing circuit of dTof chip |
| CN115112919A (en) * | 2022-06-20 | 2022-09-27 | 九江七所精密机电科技有限公司 | Fluid flow velocity detection method and device based on photoelectric pulse |
| CN115112919B (en) * | 2022-06-20 | 2023-08-11 | 九江七所精密机电科技有限公司 | Photoelectric pulse-based fluid flow velocity detection method and device |
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Application publication date: 20141210 |