CN205192918U - It corrects oil particle detection device to have light source fluctuation - Google Patents
It corrects oil particle detection device to have light source fluctuation Download PDFInfo
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- CN205192918U CN205192918U CN201521036645.7U CN201521036645U CN205192918U CN 205192918 U CN205192918 U CN 205192918U CN 201521036645 U CN201521036645 U CN 201521036645U CN 205192918 U CN205192918 U CN 205192918U
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Abstract
The utility model discloses an it corrects oil particle detection device to have light source fluctuation, including the capillary, set up the light source in capillary one side, set up and be used for receiving the sensor that passes the light signal of capillary at the capillary opposite side, and with the signal processing module of sensor intercommunication, signal processing module include that the input is respectively through low pass filter and high pass filter and meet to sensor output's divider amplifier circuit, and treater. The utility model discloses an it corrects oil particle detection device to have light source fluctuation, the divider has been introduced on signal processing, the output signal who is about to the sensor divide into two the tunnel, two way signal input divider circuit, carry out the division operation, the measurement precision is improved, and then behind the multi -stage amplifiers circuit, only need to carry out the comparison and can obtain corresponding result with a predetermined level of examineing, reduce the setting of examineing voltage, the setting of whole circuit cost is reduced and processing procedure, utilize the intellectuality and the miniaturation of product.
Description
Technical field
The utility model relates to liquor quality detection technique field, particularly relates to a kind of with light source fluctuation correction oil product grain testing apparatus.
Background technology
Figure 1 shows that the theory diagram of the grain count device of prior art; As shown in Figure 1, it comprises the sensor 101 detecting insoluble particle, the signal processing circuit 102 be connected with sensor 101, the counting module 105 be connected with the output terminal of signal processing circuit 102 and the MCU104 be connected with counting module to traditional insoluble particle counting assembly.
This insoluble particle counting assembly adopts voltage compare mode to work.First, the photo-signal that sensor 101 exports is converted to voltage signal through the amplification of signal processing circuit 102 and filtering, and this voltage signal is made up of some pulses with different amplitude and pulsewidth, and each pulse corresponds to an insoluble particle.Then voltage signal is input in counting module 105.Counting module 105 comprises the single pass number system 103 of some roads parallel connection, every road number system 103.Figure 2 shows that the theory diagram of the number system in the grain count device of prior art.As shown in Figure 2, comprise the comparer 201 with two input ends, one that presets to input end input of comparer 201 with a DAC203 and counting circuit 202 of the reference voltage corresponding to certain granules particle diameter.Another input end of comparer 201 is the voltage signal that exports of input signal processing circuit 102 then, and reference voltage derives from MCU104.
This device is when carrying out multi-channel detection to realize the synchronous counting of the particle of different-grain diameter, the particle diameter preset in the number system of each road can not be changed, and need multiple default reference voltage, make test use procedure loaded down with trivial details, be unfavorable for the microminiaturization of device, intellectuality.
Utility model content
The purpose of this utility model is the technological deficiency for existing in prior art, and provides a kind of with light source fluctuation correction oil product grain testing apparatus.
The technical scheme adopted for realizing the purpose of this utility model is:
A kind of with light source fluctuation correction oil product grain testing apparatus, comprise kapillary, be arranged on the light source of kapillary side, be arranged on kapillary opposite side in order to receive the sensor through the light signal of kapillary, and the signal processing module to be communicated with described sensor, described signal processing module comprises input end and is connected to the divider of sensor output through low-pass filter and Hi-pass filter respectively, multiple amplifying circuit be connected in series with the output of described divider successively, be connected with the output of described amplifying circuit one by one and with screen the comparer that compares of level, and export with described comparer the processor be connected accordingly.
Described amplifying circuit comprises the bandpass filter and amplifier that are arranged in series.
The cross section of described kapillary is square, described light source is the LASER Light Source that directional light exports, the hot spot of described LASER Light Source is the circle that diameter is greater than described capillary width, lighttight sheet material is provided with between described LASER Light Source and kapillary, described sheet material is provided with the narrow gap that its bearing of trend is vertical with fluid flow direction, the length of described narrow gap is greater than the width of described kapillary.
The cross section of described kapillary is square, and its internal diameter length of side is 0.5-0.9mm.
The height of described narrow gap is 0.1-0.2mm, described sheet metal thickness 1-3mm.
Compared with prior art, the beneficial effects of the utility model are:
Of the present utility model with light source fluctuation correction oil product grain testing apparatus, signal transacting introduces divider, output signal by sensor is divided into two-way, wherein a road obtains DC reference level (s1) after low-pass filtering, and this DC reference level depends on the light intensity that light source exports and the transmitance of oil product to light itself; Another road obtains the pulse signal (s2) that baseline is zero after high-pass filtering, and these pulse signals correspond to the particle in oil product.Two paths of signals input divider circuit, carry out division arithmetic, improve measuring accuracy, and then after multistage amplifier circuit, only need the examination level predetermined to compare and can obtain corresponding result, reduce the setting of discrimination voltage, reduce setup cost and the processing procedure of integrated circuit, utilize intellectuality and the microminiaturization of product.
Accompanying drawing explanation
Figure 1 shows that the theory diagram of the grain count device of prior art;
Figure 2 shows that the theory diagram of the number system in the grain count device of prior art;
Figure 3 shows that the structural representation correcting oil product grain testing apparatus with light source fluctuation of the present utility model;
Figure 4 shows that signal processing module structural representation of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 3-4, of the present utility modelly correct oil product grain testing apparatus with light source fluctuation and comprise the kapillary 1 fixed vertically by support 10, be arranged on the light source 2 of kapillary side, be arranged on the sensor 3 of kapillary opposite side, the peristaltic pump impelling liquid flow is connected with described kapillary, and the signal processing module to be communicated with described sensor, described signal processing module comprises input end and is connected to the divider of sensor output through low-pass filter and Hi-pass filter respectively, multiple amplifying circuit be connected in series with the output of described divider successively, be connected with the output of described amplifying circuit one by one and with screen the comparer that compares of level, and the processor be connected with the output of described comparer accordingly.Wherein, described support 10 comprises two reeded right-angle connectors 11 and 14 of inner side tool, two described web member correspondences are fixedly connected with and can be located by kapillary 1 by described groove, simultaneously, the lower end of described kapillary and lower end are respectively arranged with inlet nozzle 12 and oil outlet 13, wherein, water-proof silica-gel is provided with between kapillary and groove using as laminating and fixing use.
Of the present utility model with light source fluctuation correction oil product grain testing apparatus, signal transacting introduces divider, output signal by sensor is divided into two-way, wherein a road obtains DC reference level (s1) after low-pass filtering, and this DC reference level depends on the light intensity that light source exports and the transmitance of oil product to light itself; Another road obtains the pulse signal (s2) that baseline is zero after high-pass filtering, and these pulse signals correspond to the particle in oil product.Two paths of signals input divider circuit, carry out division arithmetic, export as-10*s2/s1, wherein-10 are divider peripheral circuits is parameters, can be arranged by circuit calibration.The effect of divider eliminates the impact of light source and oil product itself to the impact of the transmitance of light.If laser is comparatively strong, the light received also can be comparatively strong, and namely DC reference level s1 is higher, and the pulse height s2 that particle is corresponding also can be larger; Otherwise if laser is more weak, s1 is lower, s2 also can be less, and s2 and s1 is directly proportional, and the ratio between them depends on the projected area of particle at optical propagation direction.This divider makes s2 divided by s1, can eliminate the impact that light source fluctuation causes.On the other hand, being of different shades of oil product, also different to the transmitance of light.As a same reason, transmitance is higher, and s1 is higher, and s2 also can be larger; Otherwise transmitance is lower, s1 is lower, and s2 also can be less.Therefore divider also can eliminate the error that oil product itself causes the transmitance difference of light, improve measuring accuracy, and then after multistage amplifier circuit, only need the examination level predetermined to compare and can obtain corresponding result, reduce the setting of discrimination voltage, reduce setup cost and the processing procedure of integrated circuit, utilize intellectuality and the microminiaturization of product.
Specifically, amplifying circuit at different levels comprises bandpass filter and amplifying circuit respectively, and the signal that divider exports eliminates the DC component and high frequency noise that circuit may introduce after bandpass filter, improves signal quality.Then signal input first order amplifier, after amplifying certain multiple, make the electric pulse of diameter corresponding to the particle of 100 μm reach certain amplitude, namely a little more than examination level, namely first order amplifier output signal is divided into two-way, a wherein road and the common input comparator of examination level, the square-wave pulse of to be amplitude by the pulses switch of satisfied examination condition be 3.3V, input processor carries out step-by-step counting; Another road signal inputs second level amplifier after bandpass filtering, after amplifying certain multiple, make the electric pulse of diameter corresponding to the particle of 50 μm reach certain amplitude, namely a little more than examination level, for avoiding particle by repeat count, processor corresponds to each particle size a counting channel, and they are provided with priority: the square-wave pulse counting priority of the correspondence of 100 μm is the highest, and the priority of 50 μm of corresponding square-wave pulses is taken second place, by that analogy, the priority of 4 μm is minimum.When the square-wave pulse representing 100 μm of particles arrives, all counting channels all can receive this signal, but the highest passage of the priority only receiving signal counts, and the passage of other lower priority does not then respond this signal.In like manner, when the square-wave pulse of 50 μm of particles arrives, the channel reception of 100 μm is less than signal, naturally do not respond, the passage now receiving the limit priority of signal is 50 μm of passages, and it can count, the passage of other lower priority does not then count, by that analogy.Corresponding square-wave pulse is obtained and input processor counting through above-mentioned same method.By that analogy, can obtain respectively corresponding to diameter is 25 μm, 15 μm, the square-wave pulse of the particle of 6 μm and 4 μm etc.These square-wave pulse input processors, corresponding certain flow counts within a certain period of time, and calculates the class of pollution.Afterwards, these count values and the class of pollution show by touching device by processor, through latch digital-to-analog conversion more simultaneously after exporting, realize analog output (scope 0 ~ 5V) to these results.
For improving particle counts result, preferably, the cross section of described kapillary is square, and as being square, its internal diameter length of side is 0.5-0.9mm, is preferably 0.7mm; Described light source is the LASER Light Source that directional light exports, the hot spot of described LASER Light Source is the circle that diameter is greater than described capillary width, lighttight sheet material 4 is provided with between described LASER Light Source and kapillary, described sheet material is provided with the narrow gap that its bearing of trend is vertical with fluid flow direction, the length of described narrow gap is greater than the width of described kapillary, and described sensor is photodiode.The height of described narrow gap is 0.1-0.2mm, described sheet metal thickness 1-3mm.Sheet material is opened one slit, the circular light spot of parallel for laser instrument output is its role is to become linear light, this linear light and kapillary intersect vertically the small photosensitive region of formation one, grain flow can cause the change of transmitted light intensity through this photosensitive region, wherein, the job operation of slit will ensure edge flat smooth as far as possible, if edge roughness can impact the measuring accuracy of particle.
Utilize lasing area light source to coordinate formation directional light formula line source with narrow gap, instead of directly adopt line source formula LASER Light Source, improve quality light source, effectively overcome the impact of capillary wall on light, ensure the accurately effective of measurement result, mechanical processing difficulty is little simultaneously, and it is low that entirety realizes cost.
The above is only preferred implementation of the present utility model; it should be noted that; for those skilled in the art; under the prerequisite not departing 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 (5)
1. correct oil product grain testing apparatus with light source fluctuation for one kind, it is characterized in that, comprise kapillary, be arranged on the light source of kapillary side, be arranged on kapillary opposite side in order to receive the sensor through the light signal of kapillary, and the signal processing module to be communicated with described sensor, described signal processing module comprises input end and is connected to the divider of sensor output through low-pass filter and Hi-pass filter respectively, multiple amplifying circuit be connected in series with the output of described divider successively, be connected with the output of described amplifying circuit one by one and with screen the comparer that compares of level, and export with described comparer the processor be connected accordingly.
2. correct oil product grain testing apparatus with light source fluctuation as claimed in claim 1, it is characterized in that, described amplifying circuit comprises the bandpass filter and amplifier that are arranged in series.
3. correct oil product grain testing apparatus with light source fluctuation as claimed in claim 1, it is characterized in that, the cross section of described kapillary is square, described light source is the LASER Light Source that directional light exports, the hot spot of described LASER Light Source is the circle that diameter is greater than described capillary width, lighttight sheet material is provided with between described LASER Light Source and kapillary, described sheet material is provided with the narrow gap that its bearing of trend is vertical with fluid flow direction, the length of described narrow gap is greater than the width of described kapillary.
4. correct oil product grain testing apparatus with light source fluctuation as claimed in claim 3, its feature exists, and the cross section of described kapillary is square, and its internal diameter length of side is 0.5-0.9mm.
5. correct oil product grain testing apparatus with light source fluctuation as claimed in claim 3, it is characterized in that, the height of described narrow gap is 0.1-0.2mm, described sheet metal thickness 1-3mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521036645.7U CN205192918U (en) | 2015-12-11 | 2015-12-11 | It corrects oil particle detection device to have light source fluctuation |
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| CN201521036645.7U CN205192918U (en) | 2015-12-11 | 2015-12-11 | It corrects oil particle detection device to have light source fluctuation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424569A (en) * | 2015-12-11 | 2016-03-23 | 天津成科传动机电技术股份有限公司 | Oil product particle detection device with light source fluctuating correction function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424569A (en) * | 2015-12-11 | 2016-03-23 | 天津成科传动机电技术股份有限公司 | Oil product particle detection device with light source fluctuating correction function |
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