CN1385683A - Photoelectric temp. monitor - Google Patents
Photoelectric temp. monitor Download PDFInfo
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- CN1385683A CN1385683A CN 02112192 CN02112192A CN1385683A CN 1385683 A CN1385683 A CN 1385683A CN 02112192 CN02112192 CN 02112192 CN 02112192 A CN02112192 A CN 02112192A CN 1385683 A CN1385683 A CN 1385683A
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- receiver
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- temperature
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- catoptron
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Abstract
The photoelectric-mode temperature monitoring equipment combines the optical technology with the method of the traditional temperature measuring,its configuration simple and cost cheap.This equipment has a light path component fastened on a temperature-sensing component that is composed of two kinds of materials whose thermal-espansion coefficient are different,and the ilght path component can be the combination of either the beam emitter which composes the perpendicular incidence light path and the beam receiver with the reflector,or the beam emitter which composes the reflecting light path and the beam receiver with the reflector.Abeam emitted from the emitter irradiates the beam receiver and is received by it,or the beam irradiates the reflector and is reflected intl the receiver,then hte beam is received by the receiver which is linked with the processing device by the receiver outputting light signals.
Description
Technical field
The invention belongs to the temperature monitoring technology, relates to photoelectric sensing remote temperature monitoring device.
Background technology
Temperature sensor technology is one of sensing technology that is most widely used in commercial production and the daily life, and the measurement and the monitoring that utilize temperature sensor technology to carry out temperature are extremely important in commercial production and daily life.Present widely used temperature monitoring technology is mainly used contact fax sense technology, for example thermojunction type, thermal resistance type, ic-type equitemperature sensing technology.But these technology are using the certain difficulty of existence in some cases, for example in fields such as EHV transmission equipment, combustible and explosive articles, conductive bodies.In the temperature monitoring of EHV transmission equipment, owing to be in the strong-electromagnetic field, general contact fax sensing temperature method is difficult to solve Insulation Problems and electromagnetic interference problem.In the temperature monitoring of combustible and explosive articles, owing to the fax sensing mode causes that easily electric spark causes danger.In the temperature monitoring of conductive body, because the influence of temperature detector rerum natura causes thermometric accuracy to descend.
Be example below with the extra high voltage network, describe some shortcomings of existing temperature monitoring technology in detail.In extra high voltage network, because electrical equipments such as high-tension switch or transformer are because of some reason can produce a large amount of heats, if processing in time can cause high-voltage switch gear or transformer to be burnt, thereby cause the generation of accident, cause heavy economic losses.Therefore it is extremely important equipment such as high-tension switch contact and transformer to be carried out monitoring temperature.But be in the strong-electromagnetic field owing to need carry out the environment of monitoring temperature, general contact temperature-measuring method is difficult to solve Insulation Problems and electromagnetic interference problem.Adopt contactless infrared radiation temperature method, measurement result is easily affected by environment, and cost is very high, and is not suitable for using in situations such as high-tension switch cabinet.Chinese patent application number is 02112071.4 and is called " light-sensing temperature monitoring device ".Adopt a catoptron to be installed on the temperature-sensitive member of two kinds of materials having different thermal expansion coefficient formations, the temperature-sensitive member contacts with point for measuring temperature or is close as far as possible, along with the point for measuring temperature temperature variation, two temperature-sensitive member dilatational straiies are variant, make mirror deflection, the incident light irradiation reflected light on catoptron is also wanted deflection, and it is also different that reflected light is radiated at the position of serial receiver, according to the indication of receiver position, just can obtain the temperature conditions of point for measuring temperature.Temperature-sensitive element structure form can have support rack type or bimetal type.Utilize the full optical means to carry out temperature survey and signal transmission, solved problems such as insulation in the strong-electromagnetic field and interference preferably.But device need be provided with a series of receivers, and structure is comparatively complicated; And the precision of measuring temperature is subject to the quantity of receiver, can only carry out high-precision measurement to point for measuring temperature in little temperature range.
Summary of the invention
The invention provides a kind of photo-electric device for detecting temperature, overcomes the shortcoming of prior art, and simplified structure does not need a series of receivers, has reduced the volume of temperature probe, can realize high-precision measurement to the large-scale temperature variation of point for measuring temperature.Make like this and be applicable to accurate measurement and the monitoring reliably under the aforesaid multiple situation temperature carried out by the photoelectric sensing device for detecting temperature.
To achieve these goals, its technical scheme is to comprise the same with the above-mentioned patent support rack type that is made of two kinds of materials having different thermal expansion coefficient or the temperature-sensitive member of bimetallic strip type, and signal processing apparatus.Design feature is that the light path member is fixedly mounted on the temperature-sensitive member.The light path member can be that the light-beam transmitter and the beam receiver of formation direct projection light path also can be the light-beam transmitter that constitutes reflected light path, the combination of beam receiver and catoptron, shining receiver from the transmitter emitted light beams is received, perhaps shine on the catoptron from the transmitter emitted light beams, be reflected on the receiver and receive, export light signal to treating apparatus by receiver, realize opto-electronic conversion, signal amplifies, data processing, functions such as record demonstration or warning can be carried out high-precision measurement monitoring to the temperature of testee by the power indication that receives light signal.
The light-beam transmitter and the beam receiver that constitute the light path member can or be collimating apparatus for treated fiber end face.When the light path member is when being made of treated fiber end face, the light-beam transmitter emitted light beams is generally divergent beams, and in order to receive enough luminous powers, transmitter and receiver or transmitter and catoptron must be installed very closely.When the light path member was made of collimating apparatus, because the transmitter emitted light beams is a collimated light beam, the distance between transmitter and receiver or transmitter and the catoptron can be more longer.
Though the version of temperature-sensitive member and light path member has multiple choices in the device, comes from same design, temperature-measurement principle is identical with method.
The beneficial effect of the invention:
(1) this device combines the light path member with the temperature-sensitive member, utilizes temperature-sensitive member thermal expansion distortion to cause departing from of light path, causes the change of optical signal power, measures temperature by the light signal transmission.Solved the insulation in the strong-electromagnetic field, interference problem fully, the safety problem of combustible and explosive articles, measurement accuracy problem or the like makes this device be suitable for accurate measurement and the monitoring of in all cases temperature being carried out reliably;
(2) this apparatus structure is simple, and is with low cost, do not need complicated series type acceptor device is set, and with low cost, working service is more convenient, and what is more important can realize high-precision continuous coverage to the large-scale temperature variation of measured body;
(3) this device not only is adapted to be mounted within various different places, and has the shorter thermometric response time because the volume of temperature probe is more small and exquisite.
Description of drawings
Fig. 1 is the structural representation of example 1;
Fig. 2 is the structural representation of example 2;
Fig. 3 is a temperature-measurement principle synoptic diagram of the present invention;
Fig. 4 is the structural representation of example 3;
Fig. 5 is the structural representation of example 4;
Fig. 6 is the structural representation of example 5;
Fig. 7 is the structural representation of example 6;
Fig. 8 is the structural representation of example 7.
Embodiment:
Describe the embodiment of technical scheme in detail with reference to accompanying drawing.
Example 1: as shown in Figure 1, the transmitter 4 and the receiver 7 that constitute the light path member are fixedly mounted on the bimetallic strip temperature-sensitive member 5 by web member 3 and web member 8 respectively, and incident light 1 is converted into light beam 6 via optical fiber 2 by transmitter 4 and shines on the receiver 7; Bimetallic strip temperature-sensitive member 5 contacts with point for measuring temperature or is close as far as possible, and the light signal that receiver 7 receives is transferred to treating apparatus 9 by optical fiber 10.Treating apparatus has functional devices such as opto-electronic conversion, signal amplification, data processing, record demonstration, warning.When the temperature of point for measuring temperature changed, the temperature of bimetallic strip temperature-sensitive member 5 can change thereupon, because the stress that thermal expansion produces in the bimetallic strip causes bimetallic strip to produce a certain amount of bending, and had certain relation between temperature variation and the flexibility.As shown in Figure 3, when temperature changed, bimetallic strip 5 bent, and changed to 5 ' position, and the web member 8 and the receiver 7 that are attached thereto change to the position shown in the dotted line.As can be seen, along with the variation of bimetallic strip degree of crook, the power that the light beam 6 that is sent by transmitter 4 is received device 7 received luminous powers can change thereupon.Therefore, the watt level that test receives from receiver 7 can demonstrate receiver position deviation degree, by the relation between bimetallic strip degree of crook and the temperature variation, can further determine the temperature variation of measured body, through recording the temperature value of measured body after the calibration.Because the power of light signal has directly reflected the temperature of testee, therefore only need the luminous power power that receive be detected, thereby draw the temperature of testee, reach the purpose of temperature monitoring.From above temperature-measurement principle as can be known, under a certain temperature, when the luminous power that receives reaches maximum, all can cause the decline of the luminous power that receives above and below this variation of temperature, therefore for the trend of clear and definite temperature variation, need the restriction bimetallic strip only to a direction bending.In summary, because the power of light signal and the temperature of testee exist than direct relation, and the direct continuous detecting of the power of light signal, therefore utilize this device to carry out direct high-acruracy survey and not need to increase the number of receiver to the temperature of testee.The precision of measuring temperature mainly depends on the detection accuracy of luminous power and the quantitative relationship between bimetallic strip deformation amplitude and the temperature variation.Because flashlight is sent to by optical fiber 10 and handles at a distance again, therefore can accomplish high pressure insulated fully is not subjected to the interference of extraneous strong-electromagnetic field, without any danger, is not subjected to influence of thermometric material rerum natura or the like to inflammable and explosive.This device volume is little, and precision and reliability height are very suitable for being installed in small device inside, space.
Example 2: as shown in Figure 2, adopt the temperature-sensitive member same, but the light path member adopts reflection-type with example 1.Device 4 and catoptron 11 as transmitter and receiver is fixedly mounted on the bimetallic strip temperature-sensitive member 5 by web member 3 and web member 8 respectively simultaneously, incident light 1 is converted into light beam 6 via optical fiber 2 by transmitter 4 and shines on the catoptron 11, and the light of mirror reflects is received device 4 and receives.Because the point for measuring temperature temperature variation cause the bending of bimetallic strip 5 to cause angle and distance between catoptron mounted thereto 11 and the transmitter 4 to change, thereby the luminous power that makes catoptron 11 reflex on the receiver 4 changes thereupon.The light signal that receiver 4 receives is transferred in the reflected light separation vessel 12 by optical fiber 2, and reflected light separation vessel 12 can be made of photo-coupler or optical circulator etc., and reflected light signal is split in another root optical fiber 15, is transferred to then in the treating apparatus 9.The advantage of this device is to save a receiver that is placed on the point for measuring temperature.
What example 3 and example 1 were different is the bimetallic strip 5 that the temperature-sensitive member adopts U type structure.As shown in Figure 4, transmitter 4 and receiver 7 are fixedly mounted on two arm ends of U type bimetallic strip respectively by web member 3 and web member 8.When temperature changes, the subtended angle of U-shaped structure can change, thereby change transmitter 4 and receiver 7 distance and angle each other, make luminous power and the testee temperature correlation that receiver 7 receives, reach the purpose of monitor temperature by the power of measuring light signal power.
What example 4 and example 2 were different is the bimetallic strip 5 that the temperature-sensitive member adopts U type structure.As shown in Figure 5, two arms that simultaneously are fixedly mounted on U type bimetallic strip respectively by web member 3 and web member 8 as the device 4 and the catoptron 11 of transmitter and receiver.When temperature changes, the subtended angle of U-shaped structure can change, thereby change transmitter 4 and catoptron 11 distance and angle each other, reflex to luminous power and the testee temperature correlation that receiver 4 is received from catoptron 11, reach the purpose of monitor temperature by the power of measuring light signal.
What example 5 and example 2 were different is that the light path member adopts transmitter 4, receiver 7 and the reflection type optical path that catoptron constitutes.As shown in Figure 6, transmitter 4 and receiver 7 are by web member 3 and 5 fixed installations of thermometal temperature-sensitive member, and catoptron 11 is by the other end fixed installation of web member 8 with temperature-sensitive member 5.Angled formation reflected light path between transmitter 4 and receiver 7 and the catoptron 11.Equally, the luminous power that causes receiver 7 to receive owing to the 5 flexural deformation meetings of thermometal temperature-sensitive member can vary with temperature and change, and the light signal that receiver 7 receives is transferred in the treating apparatus 9 by optical fiber 10 and handles.This light path member can be installed on U type thermometal temperature-sensitive member and the two supporting structure temperature-sensitive members equally.
What example 6 and example 2 were different is that the temperature-sensitive member adopts two supporting structures.As shown in Figure 7, support 13 and support 14 that two supporting structures are made by two kinds of different thermal expansion coefficient materials constitute, the one end links to each other with catoptron 11 by web member 8, the other end links to each other with the device 4 of while as transmitter and receiver by web member 3, and web member 3 can be made the form of casing.When the temperature of point for measuring temperature changes, the temperature of two supporting structure temperature-sensitive members changes thereupon, because the different support 13 of thermal expansivity and support 14 can produce length difference, thereby the catoptron 11 that causes linking to each other with two supporting structures produces deflection, transmitter 4 and catoptron 11 distance and angle have each other been changed, so reflex to luminous power and the testee temperature correlation that receiver 4 is received from catoptron 11, reach the purpose of monitor temperature by the power of measuring light signal.
Example 7 is similar with example 6, same two supporting structures that adopt of temperature-sensitive member, and different is the direct light type light path that the light path member adopts transmitter 4 and receiver 7 to constitute.As shown in Figure 8, transmitter 4 and receiver 7 are fixedly mounted on the two ends of two supporting structure temperature-sensitive members respectively by web member 3 and web member 8.Temperature variation makes two supporting structures produce length difference, and the receiver 7 that causes being attached thereto produces deflections, and luminous power that receives on the receiver 7 and testee temperature correlation reach the purpose of monitor temperature by the power of measuring light signal.
Claims (8)
1. photo-electric device for detecting temperature, comprise temperature-sensitive member and signal processing apparatus, it is characterized in that a light path member and the fixed installation of temperature-sensitive member, the light path member can be that the light-beam transmitter and the beam receiver of formation direct projection light path also can be the combination that constitutes light-beam transmitter, beam receiver and the catoptron of reflected light path, shining receiver from the transmitter emitted light beams is received, perhaps shine on the catoptron from the transmitter emitted light beams, be reflected on the receiver and receive, by receiver output light signal to treating apparatus.
2. by the described photo-electric device for detecting temperature of claim 1, the light-beam transmitter and the beam receiver that it is characterized in that constituting the light path member are treated fiber end face.
3. by the described photo-electric device for detecting temperature of claim 1, the light-beam transmitter and the beam receiver that it is characterized in that constituting the light path member are collimating apparatus.
4. by claim 1 or 2 or 3 described photo-electric device for detecting temperature, the transmitter (4) and the receiver (7) that it is characterized in that constituting the light path member are fixedly mounted on the bimetallic strip temperature-sensitive member (5) by web member (3) and web member (8) respectively, incident light (1) is converted into light beam (6) via optical fiber (2) by transmitter (4) and shines on the receiver (7), and the light signal that receiver (7) receives is transferred to treating apparatus (9) by optical fiber (10).
5. by claim 1 or 2 or 3 described photo-electric device for detecting temperature, it is characterized in that constituting not only being fixedly mounted on the bimetallic strip temperature-sensitive member (5) by web member (3) and web member (8) respectively with catoptron (11) of light path member as transmitter but also as the device (4) of receiver, incident light (1) is converted into light beam (6) via optical fiber (2) by transmitter (4) and shines on the catoptron (11), and the light of mirror reflects is received device (4) and receives; The light signal that receiver (4) receives is transferred to reflected light separation vessel (12) by optical fiber (2), and reflected light is transferred to treating apparatus (9).
6. by claim 1 or 2 or 3 described photo-electric device for detecting temperature, the transmitter (4), receiver (7) and the catoptron (11) that it is characterized in that constituting the light path member are fixedly mounted on the bimetallic strip temperature-sensitive member (5) by web member (3) and web member (8) respectively, incident light (1) is converted into light beam (6) via optical fiber (2) by transmitter (4) and shines on the catoptron (11), the light of mirror reflects is received device (7) and receives, and the light signal that receiver (7) receives is transferred to treating apparatus (9) by optical fiber (10).
7. by claim 1 or 2 or 3 described photo-electric device for detecting temperature, it is characterized in that the temperature-sensitive member is support (13) and support (14), one end of two supports links to each other with transmitter (4) by web member (3), and the other end links to each other with catoptron (11) or receiver (7) by web member (8).
8. by the described photo-electric device for detecting temperature of claim 5, it is characterized in that reflected light separation vessel (12) can be photo-coupler or optical circulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02112192 CN1385683A (en) | 2002-06-22 | 2002-06-22 | Photoelectric temp. monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02112192 CN1385683A (en) | 2002-06-22 | 2002-06-22 | Photoelectric temp. monitor |
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| Publication Number | Publication Date |
|---|---|
| CN1385683A true CN1385683A (en) | 2002-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02112192 Pending CN1385683A (en) | 2002-06-22 | 2002-06-22 | Photoelectric temp. monitor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102637338A (en) * | 2012-04-10 | 2012-08-15 | 武汉发博科技有限公司 | Reflecting point-type optical fiber temperature-sensing fire detector and manufacturing method thereof |
| CN112805545A (en) * | 2018-09-10 | 2021-05-14 | 泰连公司 | Electrical contact thermal sensing system |
| CN112805544A (en) * | 2018-09-10 | 2021-05-14 | 泰连公司 | Electrical contact thermal sensing system and method |
-
2002
- 2002-06-22 CN CN 02112192 patent/CN1385683A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102637338A (en) * | 2012-04-10 | 2012-08-15 | 武汉发博科技有限公司 | Reflecting point-type optical fiber temperature-sensing fire detector and manufacturing method thereof |
| CN112805545A (en) * | 2018-09-10 | 2021-05-14 | 泰连公司 | Electrical contact thermal sensing system |
| CN112805544A (en) * | 2018-09-10 | 2021-05-14 | 泰连公司 | Electrical contact thermal sensing system and method |
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