CN2599538Y - Infrared photoelectric liquid level sensor - Google Patents
Infrared photoelectric liquid level sensor Download PDFInfo
- Publication number
- CN2599538Y CN2599538Y CNU032156081U CN03215608U CN2599538Y CN 2599538 Y CN2599538 Y CN 2599538Y CN U032156081 U CNU032156081 U CN U032156081U CN 03215608 U CN03215608 U CN 03215608U CN 2599538 Y CN2599538 Y CN 2599538Y
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- Prior art keywords
- level sensor
- fluid
- model
- utility
- liquid level
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Abstract
The utility model discloses an infrared photoelectric level transducer used on a fluid-level sensor. A transmitting chip, a receiving chip and relevant connection electric lines are arranged on the circuit core-print-seat. The circuit core-print-seat and the optical prism are arranged in the pipe-cap and bonded into an integrated body. The utility model is characterized in a simple and compact structure, a small size, high measurement precision, high-temperature resistance, corrosion resistance, low power consumption, little heat and long service life; the control precision is particularly high, the control precision of the fluid-level sensor is superior to 0.1mm, and the utility model has unparalleled competitive power compared with other similar products for the systems that need high-precision fluid control. The utility model is not only applicable to common fluid-level measurement but also applicable to level measurement of the fluids that need explosion protection, and the fluid used in high-tech aerospace booster systems and depleted shutdown systems.
Description
(1) technical field
The utility model relates to a kind of sensor that is used for measuring liquid level, is a kind of infrared electro formula liquid level sensor specifically.
(2) background technology
At present, sensor technology is in a lower level, has limited other The Application of Technology development.Therefore each developed country greatly develops sensor technology since the eighties.In various sensor technologies, other physical quantity of level gauging technology comparison is in the status that falls behind relatively.Aspect space transporter, the sensor of useful dry reed-pipe structure, because its intrinsic explosion-proof, anticorrosion, high environmental mechanics and thermal conditions, its fuel level sensor can not satisfy reliability, miniaturization, high-precision requirement.Domestic photoelectric liquid-levle is measured and is used sensor, and generally by the discrete component assembling, because circuit is huge, light path design is difficult to, homogeneity of product is very poor, belongs to the product of sixties level.Aspect the photoelectricity reception detection infrared light receiving device is being arranged, form by phototriode, but must add amplification, and do not have driving force, be not with optical prism yet, can not use in corrosion resistant occasion, at present, the LL series of U.S. Honey Well company is only arranged, and product is similar therewith, but because its opticator adopts is plastics, so all be difficult to meet the demands at aspects such as heat-resisting, withstand voltage, corrosion-resistant and assemblings.
In the fluid level control system of various beverage machine, generally adopt the float-type liquid level sensor, the easy fouling of its composition material has mechanical wear and has fifth wheel to discharge, and serviceable life is also shorter relatively, and performance and price is lower.At oil and chemical field,, its security and measuring accuracy have been influenced because the heating of working sensor process can have side effects.
(3) summary of the invention
The utility model purpose is to overcome the shortcoming in the above-mentioned technology, proposes a kind of infrared electro formula liquid level sensor, makes its miniaturization, has high reliability, high precision, low-power consumption, does not generate heat substantially, the life-span is long, and needing in the explosion-proof liquid can be used for.
The utility model purpose is realized by following technical scheme: this infrared electro formula liquid level sensor, transmitting chip, receiving chip and the relevant electric wire that is connected are housed on the circuit core print seat, it is characterized in that circuit core print seat and optical prism all are contained in the pipe cap and bond together into an integral body.
The end face of optical prism be by with respect to vertical plane mutually two Plane intersects of symmetry form, the angle between two planes is 88 degree-92 degree, the intersection on two planes is positioned at the vertical direction of optical prism bottom surface diameter.Angle between two planes with 90 degree for best
Between transmitting chip on the circuit core print seat and receiving chip, be provided with the resistance mating plate.
The utility model has the advantages that simple in structure, compact, volume is little, the measuring accuracy height, high temperature resistant, corrosion-resistant, low-power consumption, do not generate heat substantially, the life-span is long, control accuracy particularly, this liquid level sensor control accuracy is better than 0.1mm, has unrivaled competitive power in the system of the accurate control of needs liquid level.Not only can be used for general liquid level gauging, and can be used for needing in the explosion-proof liquid and the level gauging and depleted shutdown system of high-tech space transporter system in.
(4) description of drawings:
Fig. 1 is a kind of infrared electro formula liquid level sensor structural representation,
Fig. 2 is an index path,
Fig. 3 is a fundamental diagram,
(5) embodiment, accompanying drawings
Fig. 1 is the structural representation of a kind of infrared electro formula liquid level sensor of expression, and transmitting chip 1, receiving chip 2 and the relevant electric wire that is connected are housed on circuit core print seat 5, and it is interior and bond together into an integral body that circuit core print seat 5 and optical prism 3 all are contained in pipe cap 4.Transmitting chip 1 is chosen the product that U.S. AD company produces, and model is SR-014IRA-NS-AD.Receiving chip 2 is chosen the product that Xi'an 771 is produced, and model is LD3331.Optical prism 3 selects for use K9 glass to make, the material character Stability Analysis of Structures, and the cleanliness factor height, corrosion-resistant, install simple.
The end face of optical prism be by with respect to vertical plane mutually two Plane intersects of symmetry form, the angle between two planes is 90 degree, error is one minute, the intersection on two planes is positioned at the vertical direction of optical prism bottom surface diameter.Between transmitting chip on the circuit core print seat 51 and receiving chip 2, be provided with resistance mating plate 6, stopped the light that sends by transmitting chip 1, may be received the situation generation that chip 2 receives behind the bottom reflection of optical prism 3.Avoided interference, guaranteed the degree of accuracy of measuring measurement data.
Principle of work as shown in Figure 3, the light that is sent by transmitting chip 1 is through optical prism 3, arrive receiving chip 2, change light signal into electric signal, signal is amplified through amplifier 2.2 through photodiode 2.1, with signal shaping, carry out power drive output through reshaper 2.3 through triode 2.4.
Light path by the light that luminescence chip 1 sends, is propagated arrival interface m along a as shown in Figure 2, refraction and reflection take place, and reflected light arrives the n interface along b, at interface n refraction and reflection takes place again, reflected light arrives receiving chip 2 wherein by c, and interface m and interface n are the angle of about 90 degree.In the time of in liquid, the refract light flux is much larger than reflection flux, and the luminous flux that arrives receiving chip behind two secondary reflections is very little, and the output state of receiving chip does not change.Total reflection then takes place in air, and this moment, the refract light flux was zero, and all luminous fluxes arrive receiving chip along a, b, c, and the output state of receiving chip changes.
Claims (3)
1, a kind of infrared electro formula liquid level sensor is equipped with transmitting chip, receiving chip and the relevant electric wire that is connected on the circuit core print seat, it is characterized in that circuit core print seat and optical prism all are contained in the pipe cap and bond together into an integral body.
2, according to the described infrared electro formula of claim 1 liquid level sensor, the end face that it is characterized in that optical prism is to be formed by two Plane intersects symmetrical mutually with respect to vertical plane, angle between two planes is 88 degree-92 degree, and the intersection on two planes is positioned at the vertical direction of optical prism bottom surface diameter.
3,, it is characterized in that between transmitting chip on the circuit core print seat and receiving chip, being provided with the resistance mating plate according to the described infrared electro formula of claim 1 liquid level sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032156081U CN2599538Y (en) | 2003-03-06 | 2003-03-06 | Infrared photoelectric liquid level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032156081U CN2599538Y (en) | 2003-03-06 | 2003-03-06 | Infrared photoelectric liquid level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2599538Y true CN2599538Y (en) | 2004-01-14 |
Family
ID=34160357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU032156081U Expired - Fee Related CN2599538Y (en) | 2003-03-06 | 2003-03-06 | Infrared photoelectric liquid level sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2599538Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106017430A (en) * | 2016-05-25 | 2016-10-12 | 昆明理工大学 | Hydrologic monitoring wireless sensor node apparatus based on real-time embedded CPS |
| CN106768183A (en) * | 2016-12-01 | 2017-05-31 | 上海航天设备制造总厂 | Two point form liquid level sensor for measuring Rocket tank volume loading liquid level |
-
2003
- 2003-03-06 CN CNU032156081U patent/CN2599538Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106017430A (en) * | 2016-05-25 | 2016-10-12 | 昆明理工大学 | Hydrologic monitoring wireless sensor node apparatus based on real-time embedded CPS |
| CN106768183A (en) * | 2016-12-01 | 2017-05-31 | 上海航天设备制造总厂 | Two point form liquid level sensor for measuring Rocket tank volume loading liquid level |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |