CN204241341U - A kind of dustiness detecting sensor based on photovoltaic principals - Google Patents
A kind of dustiness detecting sensor based on photovoltaic principals Download PDFInfo
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- CN204241341U CN204241341U CN201420724278.9U CN201420724278U CN204241341U CN 204241341 U CN204241341 U CN 204241341U CN 201420724278 U CN201420724278 U CN 201420724278U CN 204241341 U CN204241341 U CN 204241341U
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Abstract
The utility model discloses a kind of dustiness detecting sensor based on photovoltaic principals, belong to the sensor detected for contamination level of oil liquid in pollution detection technical field, its object is to provide that a kind of volume is little, quality light, detect data reliably based on the dustiness detecting sensor of photovoltaic principals.Its technical scheme is: comprise the light emitting diode I, oil sump, photodiode I, photoelectric switching circuit and the signal processing circuit that connect successively, signal processing circuit is connected with RS485 bus, and oil sump is provided with incident light lens, emergent light lens near light emitting diode I, photodiode I side correspondence; The parallel beam that light emitting diode I sends through after oil sump through incident light lens is radiated on photodiode I produces electric signal through emergent light lens again, and electric signal is exported by RS485 bus successively after photoelectric switching circuit, signal processing circuit analyzing and processing.The utility model is applicable to the sensor that contamination level of oil liquid detects.
Description
Technical field
The utility model belongs to pollution detection technical field, relates to a kind of sensor detected for contamination level of oil liquid, is specifically related to a kind of contamination level of oil liquid detecting sensor based on photovoltaic principals.
Background technology
In recent decades, hydrostatic transmission is widely used in the technical fields such as aviation, machine-building, petrochemical complex, mining machinery, communications and transportation, shipbuilding and earthquake prediction.Along with the usage quantity of hydraulically operated equipment (HOE) and increasing of kind, break down and the workload of keeping in repair also more and more large.And according to domestic and international statistical data, the failure rate more than 75% of hydraulically operated equipment (HOE) is caused by hydraulic oil pollution, and solid particulate matter is the pollutant the most general in hydraulic and lubricating system, damaging effect is maximum.
Along with hydraulic technique is in the widespread use of each industrial sector, the functional reliability of hydraulically operated equipment (HOE) is had higher requirement.Therefore, must detect the pollution situation of hydraulic system, carry out Environmental capacity.It is by regularly sampling at the scene that traditional oil contamination detects, and sample is taken back laboratory and carries out analysis acquisition mechanical movement situation.Although the detection of this off-line has the multifarious advantage of the equipment of analysis and means, there is acquisition long for information cycle, the deficiencies such as the operation conditions of equipment can not be reflected in time.Therefore, be badly in need of finding a kind of detection method more timely and effectively newly.
Application number is that the utility model patent of 201320510929.X discloses a kind of oil particle pollution degree detection sensor, this sensor comprises sleeve, semiconductor laser, measuring sonde, photoelectric switching circuit and signal processing circuit, some lens are provided with between measuring sonde and semiconductor laser, nozzle assembly is provided with in sleeve, fixing collimating mirror is embedded in nozzle assembly, the first slide block be connected with nozzle assembly, first slide block is fixed with filter mirror, second slide block, be fixed on the fourier lense in the second slide block, the sleeve other end is connected with bump joint, the fixture splice be connected with bump joint, and the one group of lens be located in fixture splice, one group of lens is fixed in fixture splice through screwed assembly.This sensor is based on photovoltaic principals, by reasonably arranging all kinds of optical lens, pass through in fluid to be detected oil inlet passage gap through between one group of lens, laser arrives the two ends generation current signal of reception diode after multiple lens, the light path design that this sensor has is simple, but its volume is comparatively large, heavier mass, and it is reliable not to detect data.
Summary of the invention
The purpose of this utility model is to provide that a kind of volume is little, quality light, detect data reliably based on the dustiness detecting sensor of photovoltaic principals.
For achieving the above object, the technical solution of the utility model is:
A kind of dustiness detecting sensor based on photovoltaic principals, it is characterized in that: comprise the light emitting diode I, oil sump, photodiode I, photoelectric switching circuit and the signal processing circuit that connect successively, described signal processing circuit is connected with RS485 bus, described oil sump is provided with incident light lens near light emitting diode I side, described oil sump is provided with emergent light lens near photodiode I side; The parallel beam that described light emitting diode I sends through after oil sump through incident light lens is radiated on photodiode I produces electric signal through emergent light lens again, and described electric signal is exported by RS485 bus successively after photoelectric switching circuit, signal processing circuit analyzing and processing.
During utility model works, the directional light that light emitting diode I sends is entered in oil sump by incident light lens, if there is particle to occur in oil sump, these particles will stop light and cause the reduction of luminous energy; Emergent light lens lighting is passed through on photodiode I through the light after oil sump, because the particle in oil sump has blocked some light, thus light intensity decays photodiode I received, by detecting the reduction degree being irradiated to luminous energy on photodiode I and the size and the content that succinctly calculate particle in oil sump, reliablely and stablely oil-liquid-solid particle pollution degree can be provided to detect data, and detect accurately fast.
The purpose of this utility model can also be realized by following approach:
Described incident light lens and emergent light lens are sapphire glass lens.
Described incident light lens are provided with opaque aluminium film, and described opaque aluminium center membrane position offers the viewing window for printing opacity.
Described photoelectric switching circuit comprises:
First trans-impedance amplifier, the positive ends of described first trans-impedance amplifier is connected with the positive ends of the second trans-impedance amplifier, and simultaneously ground connection,
The negative polarity end of described first trans-impedance amplifier is connected with one end of the first resistance with the anode of photodiode I respectively; The negative electrode of described photodiode I is connected with one end of the second resistance with the negative polarity end of described second trans-impedance amplifier respectively; The output terminal of the first trans-impedance amplifier described in another termination of described first resistance; The output terminal of the second trans-impedance amplifier described in another termination of described second resistance; The differential voltage V1-V2 of described first trans-impedance amplifier and described second trans-impedance amplifier output photoelectric conversion.
First electric capacity and the second electric capacity, described first Capacitance parallel connection connects described first resistance, and described second Capacitance parallel connection connects described second resistance.
Compared with prior art, the beneficial effects of the utility model are:
1, in the utility model, the photoelectric sensing parts of sensor adopt light emitting diode I and photodiode I, make that the compact overall structure of sensor, volume are little, quality is light; The directional light that light emitting diode I sends is entered in oil sump by incident light lens, if there is particle to occur in oil sump, these particles will stop light and cause the reduction of luminous energy; Emergent light lens lighting is passed through on photodiode I through the light after oil sump, because the particle in oil sump has blocked some light, thus light intensity decays photodiode I received, by detecting the reduction degree being irradiated to luminous energy on photodiode I and the size and the content that succinctly calculate particle in oil sump, reliablely and stablely oil-liquid-solid particle pollution degree can be provided to detect data, and detect accurately fast.
2, in the present embodiment, incident light lens and emergent light lens all adopt sapphire glass lens, and sapphire glass lens can be used as the form mirror at oil sump two ends, conveniently check situation in oil sump, and sapphire glass lens have good thermal characteristics, fabulous electrical specification and dielectric property, and anti-chemical corrosion, it is high temperature resistant, heat conduction is good, hardness is high, thoroughly infrared, and chemical stability is good.
3, in the present embodiment, incident light lens are provided with opaque aluminium film, described opaque aluminium center membrane position offers the viewing window for printing opacity, the directional light that light emitting diode I produces is injected in oil sump by viewing window, effectively can stop that all the other rays pass through lens are injected in oil sump, improve the detection efficiency of sensor, detect data more reliable.
4, in the present embodiment, photoelectric switching circuit is by being connected in parallel the first trans-impedance amplifier and the second trans-impedance amplifier, make the differential voltage V 1-V2 that its output photoelectric is changed, circuit provided by the invention efficiently utilizes supply voltage scope, improves speed and the interference free performance of photoelectric switching circuit.
5, in the present embodiment, when the first resistance and the second resistance are connected in parallel to the first electric capacity and the second electric capacity respectively, improve the filtering performance of photoelectric switching circuit.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the circuit diagram of photoelectric switching circuit in the utility model;
Fig. 3 is the circuit diagram of photoelectric switching circuit in another embodiment of the utility model
Fig. 4 is the circuit diagram of signal processing circuit in the utility model;
Wherein, Reference numeral is: 1-light emitting diode I, 2-incident light lens, 3-oil sump, 4-emergent light lens, 5-photodiode I, 6-photoelectric switching circuit, 8-signal processing circuit.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further:
Embodiment one
A kind of dustiness detecting sensor based on photovoltaic principals, comprise the light emitting diode I1, oil sump 3, photodiode I5, photoelectric switching circuit 6 and the signal processing circuit 8 that connect successively, signal processing circuit 8 is connected with RS485 bus, oil sump 3 two ends are by being communicated with hydraulic system return line respectively by inlet pipe joint, outlet pipe connection, oil sump 3 is provided with incident light lens 2 near light emitting diode I1 side, oil sump 3 is provided with emergent light lens near photodiode I5 side.Wherein incident light lens 2 and emergent light lens all adopt sapphire glass lens.The parallel beam that light emitting diode I1 sends through after oil sump 3 through incident light lens 2 is radiated on photodiode I5 produces electric signal through emergent light lens again, and this electric signal is exported by RS485 bus successively after photoelectric switching circuit 6, signal processing circuit 8.
The directional light that light emitting diode I1 sends is entered in oil sump 3 by incident light lens 2, if having particle to occur in oil sump 3, these particles will stop light and cause the reduction of luminous energy; Emergent light lens lighting is passed through on photodiode I5 through the light after oil sump 3, because the particle in oil sump 3 has blocked some light, thus light intensity decays photodiode I5 received, by detecting the reduction degree being irradiated to luminous energy on photodiode I5 and the size and the content that succinctly calculate particle in oil sump 3, reliablely and stablely oil-liquid-solid particle pollution degree can be provided to detect data, and detect accurately fast.
Embodiment two
On the basis of embodiment one, incident light lens 2 are provided with opaque aluminium film, and this opaque aluminium film can be fitted in incident light lens 2 both sides or wherein side, and opaque aluminium center membrane position offers the viewing window for printing opacity.By being provided with opaque aluminium film on incident light lens 2, described opaque aluminium center membrane position offers the viewing window for printing opacity, the directional light that light emitting diode I1 produces is injected in oil sump 3 by viewing window, effectively can stop that all the other rays pass through lens are injected in oil sump 3, improve the detection efficiency of sensor, detect data more reliable.
Embodiment three
On the basis of embodiment one or embodiment two, in photoelectric switching circuit 6 as shown in Figure 2, this photoelectric switching circuit 6 comprises the first trans-impedance amplifier A1, and the positive ends of the first trans-impedance amplifier A1 is connected with the positive ends of the second trans-impedance amplifier A2, and simultaneously ground connection;
The negative polarity end of the first trans-impedance amplifier A1 is connected with one end of the first resistance R1 with the anode of photodiode D respectively; The negative electrode of photodiode D is connected with one end of the second resistance R2 with the negative polarity end of the second trans-impedance amplifier A2 respectively; The output terminal of another termination first trans-impedance amplifier A1 of the first resistance R1; The output terminal of another termination second trans-impedance amplifier A2 of the second resistance R2; The differential voltage V1-V2 of the first trans-impedance amplifier A1 and the conversion of the second trans-impedance amplifier A2 output photoelectric.
Embodiment four
On the basis of embodiment three, also comprise the first electric capacity C1 and the second electric capacity C2, the first electric capacity C1 is connected in parallel the first resistance R1, and the second electric capacity C2 is connected in parallel the second resistance R2.
Embodiment five
On the basis of embodiment one or embodiment two, as described in Figure 3 in photoelectric switching circuit, A1, A2 are operational amplifier OP27, T1 is semiconductor laser diode, and T2 is light receiving tube, and T1 positive pole is connected with+14V direct supply by resistance R3, the direct ground connection of negative pole.Light receiving tube triode T2 collector is connected with the input end 2 of operational amplifier A 1, and emitter is connected with the input end 3 of operational amplifier A 1.Resistance R1 two ends are connected with output terminal 6 with the input end 2 of operational amplifier A 1 respectively, and resistance R4 connects the output terminal 6 of operational amplifier A 1 and the input end 3 of operational amplifier A 2.Resistance R2 one end is connected publicly with circuit, the other end is connected with the input end 2 of operational amplifier A 2, electric capacity C1 is connected with output terminal 6 with the input end 2 respectively at operational amplifier A 2 after potentiometer R5 parallel connection, the collector of the output terminal 6 of resistance R6 Linked operators amplifier A2 and the base stage triode T3 of triode T3 connects the direct supply of+14V, launches being input in passage of very signal.
Embodiment six
On the basis of above-described embodiment, signal processing circuit 8 is divided into two-way, each own different effect.A following road is as threshold values Circuit tuning, and the current signal according to input carries out certain conversion process, exports six tunnel DC level (only drawing three tunnels in figure), as the comparative voltage of the operational amplifier in six channels that whole circuit exports.One tunnel of top is the major part of whole circuit, is input as AC signal.After the amplitude limit and isolation of operational amplifier A 3, delivered to by electric signal in six passages exported, each passage has different threshold voltages, and this threshold voltage is provided by following DC channel.After relatively, export pulse square wave to counter corresponding to each passage, output detections result.Wherein, U1 is the amplification channel of AC signal, U2 is the amplification sampling passage of direct current signal, and after amplifying, flowed through the threshold values comparer of flooring by the AC signal of U1, the threshold values of comparer arranges and obtained through slide rheostat dividing potential drop by the output signal of U2 amplifier.The threshold values that the particle of each particle diameter is corresponding different, just can be set to threshold voltage on the representative value corresponding with each particle diameter very easily by the intervention resistance arranging the slide rheostat on each road.U3 is the secondary circuit of the upper limit that AC signal exports, and in order to prevent the amplification to undesired signal, if this amplitude limiter circuit can improve the measuring accuracy of circuit, reduces error.U5, U6, U7 are comparator circuit.Wherein the setting value of threshold values passes through the dividing potential drop gained of DC level on slide rheostat of lower part, and threshold values is by setting the adjustment of slide rheostat resistance.
Embodiment six
On the basis of above-described embodiment, also be provided with control module, this control module can be the minimum system of single-chip microcomputer, DSP or FPGA/CPLD, or minimum system adding portion peripheral hardware forms, have high-precision a/d converter and certain computing, control ability, control module compartment of terrain sends ultraviolet light start pulse signal.This control module is electrically connected with light emitting diode I1, and this control module compartment of terrain sends start pulse signal, and the start pulse signal that this light emitting diode I1 reception control unit sends also correspondingly sends directional light directive oil sump 3 according to this start pulse signal.This control module is electrically connected with signal processing circuit 8, this signal processing circuit 8 is delivered to control module after being processed by analysis by the electric signal corresponding to the light transmitted through oil sump, and this control module obtains the judged result of solid particle pollution degree in oil sump 3 according to the electric signal received.
Claims (5)
1. the dustiness detecting sensor based on photovoltaic principals, it is characterized in that: comprise the light emitting diode I(1 connected successively), oil sump (3), photodiode I(5), photoelectric switching circuit (6) and signal processing circuit (8), described signal processing circuit (8) is connected with RS485 bus, described oil sump (3) is upper near light emitting diode I(1) side is provided with incident light lens (2), described oil sump (3) is upper near photodiode I(5) side is provided with emergent light lens (4); Described light emitting diode I(1) parallel beam that sends through incident light lens (2) through after oil sump (3) again through emergent light lens (4) and be radiated at photodiode I(5) on produce electric signal, described electric signal is exported by RS485 bus successively after photoelectric switching circuit (6), signal processing circuit (8) analyzing and processing.
2. a kind of dustiness detecting sensor based on photovoltaic principals as claimed in claim 1, is characterized in that: described incident light lens (2) and emergent light lens (4) are sapphire glass lens.
3. a kind of dustiness detecting sensor based on photovoltaic principals as claimed in claim 2, it is characterized in that: described incident light lens (2) are provided with opaque aluminium film, described opaque aluminium center membrane position offers the viewing window for printing opacity.
4. a kind of dustiness detecting sensor based on photovoltaic principals as claimed in claim 1, is characterized in that: described photoelectric switching circuit (6) comprising:
First trans-impedance amplifier (A1), the positive ends of described first trans-impedance amplifier (A1) is connected with the positive ends of the second trans-impedance amplifier (A2), and simultaneously ground connection,
The negative polarity end of described first trans-impedance amplifier (A1) is connected with one end of the first resistance (R1) with the anode of photodiode (D) respectively; The negative electrode of described photodiode (D) is connected with one end of the second resistance (R2) with the negative polarity end of described second trans-impedance amplifier (A2) respectively; The output terminal of the first trans-impedance amplifier (A1) described in another termination of described first resistance (R1); The output terminal of the second trans-impedance amplifier (A2) described in another termination of described second resistance (R2); The differential voltage V1-V2 of described first trans-impedance amplifier (A1) and the conversion of described second trans-impedance amplifier (A2) output photoelectric.
5. a kind of dustiness detecting sensor based on photovoltaic principals as claimed in claim 4, it is characterized in that: the first electric capacity (C1) and the second electric capacity (C2), described first electric capacity (C1) is connected in parallel described first resistance (R1), and described second electric capacity (C2) is connected in parallel described second resistance (R2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420724278.9U CN204241341U (en) | 2014-11-26 | 2014-11-26 | A kind of dustiness detecting sensor based on photovoltaic principals |
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| CN201420724278.9U CN204241341U (en) | 2014-11-26 | 2014-11-26 | A kind of dustiness detecting sensor based on photovoltaic principals |
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| CN204241341U true CN204241341U (en) | 2015-04-01 |
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| CN201420724278.9U Expired - Fee Related CN204241341U (en) | 2014-11-26 | 2014-11-26 | A kind of dustiness detecting sensor based on photovoltaic principals |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109724849A (en) * | 2019-02-02 | 2019-05-07 | 北京大学 | Filter membrane apparatus for automatic change for gas componant detection device |
| CN112683839A (en) * | 2021-03-18 | 2021-04-20 | 深圳市理邦精密仪器股份有限公司 | Method for detecting gas chamber pollution, gas detection device and readable storage medium |
-
2014
- 2014-11-26 CN CN201420724278.9U patent/CN204241341U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109724849A (en) * | 2019-02-02 | 2019-05-07 | 北京大学 | Filter membrane apparatus for automatic change for gas componant detection device |
| CN109724849B (en) * | 2019-02-02 | 2020-10-09 | 北京大学 | Automatic filter membrane replacing device and method and membrane replacing mechanism |
| CN112683839A (en) * | 2021-03-18 | 2021-04-20 | 深圳市理邦精密仪器股份有限公司 | Method for detecting gas chamber pollution, gas detection device and readable storage medium |
| CN112683839B (en) * | 2021-03-18 | 2021-07-13 | 深圳市理邦精密仪器股份有限公司 | Method for detecting gas chamber pollution, gas detection device and readable storage medium |
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Address after: 610000, No. 23, No. 2, building 1, No. 2, Tianyu Road, 2 hi tech Zone, Sichuan, Chengdu Patentee after: Keller Detection Technology Co. Ltd. Sichuan measuring Address before: 610000, No. 23, No. 2, building 1, No. 2, Tianyu Road, 2 hi tech Zone, Sichuan, Chengdu Patentee before: SICHUAN KAILE DETECTION TECHNOLOGY CO., LTD. |
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Address after: 610000 room C1003, Chengdu Intelligent Information Industrial Park, No. 898 Bai Cao Road, Chengdu High-tech Zone, Sichuan. Patentee after: SICHUAN KAILE DETECTION TECHNOLOGY CO., LTD. Address before: 610000 No. 2, unit 23, 2, Tianyu Road, 2 High-tech Zone, Chengdu, Sichuan. Patentee before: Keller Detection Technology Co. Ltd. Sichuan measuring |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150401 Termination date: 20191126 |