CN204007929U - A kind of temperature measuring device for hearth - Google Patents
A kind of temperature measuring device for hearth Download PDFInfo
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- CN204007929U CN204007929U CN201420502114.1U CN201420502114U CN204007929U CN 204007929 U CN204007929 U CN 204007929U CN 201420502114 U CN201420502114 U CN 201420502114U CN 204007929 U CN204007929 U CN 204007929U
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Abstract
The utility model discloses a kind of temperature measuring device for hearth, and its pinger and acoustic receiver are respectively arranged on the furnace wall of boiler by a conduit, and pinger and acoustic receiver are oppositely arranged, and divides the both sides that are in boiler; Micro-control unit connects the control end of pinger through transmission signal amplifying circuit, micro-control unit connects the control end of acoustic receiver through receiving signal amplification circuit; Transmitting microphone is arranged in the conduit between pinger and boiler, receives microphone and is arranged in the conduit between acoustic receiver and boiler; Micro-control unit connects transmitting microphone through the modulate circuit that transmits, and micro-control unit connects and receives microphone through receiving signal reason circuit; Liquid crystal display is connected on micro-control unit.The utlity model has degree of accuracy high, measure that temperature range is wide, measurement space is not limited, measure highly sensitive and maintainable good feature.
Description
Technical field
The utility model relates to a kind of temperature-detecting device, concrete a kind of temperature measuring device for hearth.
Background technology
Fire box temperature is measured boiler combustion control is played an important role, people have carried out large quantity research for a long time, develop the measurement mechanism of various different principle, but due to its intrinsic shortcoming, applicable cases is always not good, on even most of boiler, be still so far a blank, make boiler combustion monitoring lose an important evidence.
Tradition temperature measuring device for hearth mainly contains contact (telescopic thermometer) and contactless two classes, and contactless common have radiation thermometer and spectrum image system, the shortcoming that these technology exist is:
1) contact (telescopic thermometer)
At present the boiler of 300MW and above unit is all joined the telescopic thermometer that is provided with expensive measurement flue gas temperature of hearth outlet, but due to probe very long, heavy, the yielding bite that gos deep into burner hearth, failure rate is high, and therefore, many power plant are in fact inactive.In addition, probe is limited by heatproof, generally only in the time of boiler startup, stretches into burner hearth and measures exit gas temperature, in the time that cigarette temperature reaches certain value, must exit burner hearth at once, and therefore, it allows serviceability temperature scope and acts on also limited.
2) radiation thermometer
Well-known burner hearth gas radiation is scarcely in visible-range, and therefore, common radiation thermometer is mainly infrared type thermometer at present, the infrared light intensity in its measurement surface or region.Because burner hearth flue gas is that gaseous state is luminous, temperature distributing disproportionation is even, and composition is unfixing, adds the existence of fly ash granule radiation, and therefore, spectral wavelength and the penetration power etc. of composition are uncertain, thereby cause tested region uncertain, and measuring error is large.Due to above-mentioned disadvantages affect the application of radiation thermometer in boiler furnace smoke temperature measurement field.
3) fly ash granule radiation spectrum is measured
This class temperature measurement system is that to utilize in image detection burner hearth flue gas be mainly that the visible ray of fly ash granule radiation (comprises certain wavelength infrared light, to improve the temperature survey upper limit), machine carries out extremely complicated image processing as calculated, thereby obtains the Temperature Distribution of flue gas in burner hearth.Owing to being subject to the impact of fly ash granule constituent concentration and distribution, the impacts such as camera lens pollution and complex image Processing Algorithm, measuring error is large; Also there is very large uncertainty in measured region.Add lighting system complexity, coking or dust stratification make camera lens maintenance difficulty, and poor reliability is expensive.Thereby this type systematic is restricted in the practical implementation of burner hearth flue gas temperature measurement.
Utility model content
Technical problem to be solved in the utility model is the large and high deficiency of expense of traditional burner bore temperature measurement device measures temperature narrow range, error, and a kind of temperature measuring device for hearth is provided.
For addressing the above problem, a kind of temperature measuring device for hearth that the utility model is designed, its mainly by pinger, acoustic receiver, transmission signal amplifying circuit, reception signal amplification circuit, launch microphone, receive microphone, the modulate circuit that transmits, receiving signal reason circuit, micro-control unit and liquid crystal display form; Pinger and acoustic receiver are respectively arranged on the furnace wall of boiler by a conduit, and pinger and acoustic receiver are oppositely arranged, and divide the both sides that are in boiler; Micro-control unit connects the control end of pinger through transmission signal amplifying circuit, micro-control unit connects the control end of acoustic receiver through receiving signal amplification circuit; Transmitting microphone is arranged in the conduit between pinger and boiler, receives microphone and is arranged in the conduit between acoustic receiver and boiler; Micro-control unit connects transmitting microphone through the modulate circuit that transmits, and micro-control unit connects and receives microphone through receiving signal reason circuit; Liquid crystal display is connected on micro-control unit.
In such scheme, the number of described pinger and acoustic receiver can equate, also can be unequal.
In the time that the transverse section of boiler is quadrilateral, the number of described pinger is 4, the number of described acoustic receiver is 8, and wherein 4 pingers are arranged on respectively the middle part in 4 sidelines of boiler, and 8 acoustic receivers are arranged on respectively the both sides of 4 corners of boiler.
In such scheme, described transmission signal amplifying circuit and reception signal amplification circuit are by low noise voltage feedback amplifier, precision operational-amplifier and digital to analog converter composition; The output terminal of digital to analog converter is connected with the input end of low noise voltage feedback amplifier through precision operational-amplifier; Wherein transmission signal amplifying circuit is connected micro-control unit with the input end of the digital to analog converter that receives signal amplification circuit simultaneously; The output terminal of the low noise voltage feedback amplifier of transmission signal amplifying circuit connects pinger, and the output terminal that receives the low noise voltage feedback amplifier of signal amplification circuit connects acoustic receiver.
In such scheme, described in transmit modulate circuit and receiving signal reason circuit by low noise field effect transistor input operational amplifier, low noise voltage feedback amplifier and comparer composition; The output terminal of low noise field effect transistor input operational amplifier connects the input end of comparer through low noise voltage feedback amplifier; The input end of low noise field effect transistor input operational amplifier of modulate circuit of wherein transmitting connects micro-control unit, and the output terminal of the comparer of the modulate circuit that transmits connects transmitting microphone; The input end of the low noise field effect transistor input operational amplifier of receiving signal reason circuit connects reception microphone, and the output terminal of the comparer of receiving signal reason circuit connects micro-control unit.
Above-mentioned temperature measuring device for hearth, also further comprises host computer, and this host computer is connected with micro-control unit through serial communication bus.
In such scheme, described serial communication bus is RS485 bus.
Compared with prior art, the utlity model has following features:
The impact of the uncertain factors such as 1, degree of accuracy is high, not raying, its degree of accuracy can reach ± and 1%;
2, measurement temperature range is wide, within the scope of boiler full load, all can use;
3, measurement space is not limited, not only can measure medial temperature, can also determine fire box temperature field distribution;
4, measure highly sensitively, real-time is good;
5, maintainable good.
Brief description of the drawings
Fig. 1 is a kind of system chart of temperature measuring device for hearth.
Fig. 2 is a kind of pinger (4) of temperature measuring device for hearth and the distribution schematic diagram of acoustic receiver (8).
Fig. 3 is a kind of signal amplification circuit schematic diagram of temperature measuring device for hearth.
Fig. 4 is a kind of signal conditioning circuit schematic diagram of temperature measuring device for hearth.
Embodiment
A kind of temperature measuring device for hearth, as shown in Figure 1, its mainly by pinger, acoustic receiver, transmission signal amplifying circuit, reception signal amplification circuit, launch microphone, receive microphone, the modulate circuit that transmits, receiving signal reason circuit, micro-control unit, liquid crystal display and host computer form.Pinger and acoustic receiver are respectively arranged on the furnace wall of boiler by a conduit, and pinger and acoustic receiver are oppositely arranged, and divide the both sides that are in boiler.Micro-control unit connects the control end of pinger through transmission signal amplifying circuit, micro-control unit connects the control end of acoustic receiver through receiving signal amplification circuit.Transmitting microphone is arranged in the conduit between pinger and boiler, receives microphone and is arranged in the conduit between acoustic receiver and boiler.Micro-control unit connects transmitting microphone through the modulate circuit that transmits, and micro-control unit connects and receives microphone through receiving signal reason circuit.Liquid crystal display is connected on micro-control unit.In order can acoustic signals to be analyzed further and to be studied, as the temperature information and the reconstruct two-dimensional temperature field etc. that show and storage is measured, the utility model also further includes host computer, and this host computer is connected with micro-control unit through serial communication bus.In the preferred embodiment of the present invention, between described host computer and micro-control unit, carry out data transmission by RS485 serial communication bus.
Also can realize the measurement of boiler temperature although only have a pair of pinger and acoustic receiver, but in order to promote the degree of accuracy of measurement, the utility model adopts multiple pingers and acoustic receiver to realize, and the number of selecting of pinger and acoustic receiver can equate, also can be unequal.In the utility model preferred embodiment, the mode that transmits and receives of one-to-many, the sound wave that sonic generator sends can have multiple receivers to monitor simultaneously, a control platform can adopt and reach 16 generators and receptacle, compared with a generator concerning the system of a receptacle, not only simplify system, the more important thing is to have greatly reduced the trouble that generator must bring in the perforate of water-cooling wall bend pipe is installed on boiler.In the utility model is preferably implemented, boiler is square column type, the transverse section that is boiler is quadrilateral, now, the number of described pinger is 4, the number of described acoustic receiver is 8, and wherein 4 pingers are arranged on respectively the middle part in 4 sidelines of boiler, and 8 acoustic receivers are arranged on respectively the both sides of 4 corners of boiler.Referring to Fig. 2.
Described transmission signal amplifying circuit and reception signal amplification circuit are by low noise voltage feedback amplifier (THS031), precision operational-amplifier (OPA177) and digital to analog converter (AD7945) composition.Referring to Fig. 3.The output terminal of digital to analog converter is connected with the input end of low noise voltage feedback amplifier through precision operational-amplifier.Wherein transmission signal amplifying circuit is connected micro-control unit with the input end of the digital to analog converter that receives signal amplification circuit simultaneously.The output terminal of the low noise voltage feedback amplifier of transmission signal amplifying circuit connects pinger, and the output terminal that receives the low noise voltage feedback amplifier of signal amplification circuit connects acoustic receiver.
Described modulate circuit and the receiving signal reason circuit that transmits forms by low noise field effect transistor input operational amplifier (OPA657), low noise voltage feedback amplifier (THS4031) and comparer (MAX999).Referring to Fig. 4.The output terminal of low noise field effect transistor input operational amplifier connects the input end of comparer through low noise voltage feedback amplifier.The input end of low noise field effect transistor input operational amplifier of modulate circuit of wherein transmitting connects micro-control unit, and the output terminal of the comparer of the modulate circuit that transmits connects transmitting microphone.The input end of the low noise field effect transistor input operational amplifier of receiving signal reason circuit connects reception microphone, and the output terminal of the comparer of receiving signal reason circuit connects micro-control unit.
Pinger and acoustic receiver are installed on boiler wall, pinger is arranged on to one side of boiler, acoustic receiver is arranged on to other one side, acoustic signals is launched through transmitting microphone, and acoustic signals detects through being just received microphone at receiver end after boiler.Because the distance between transmitter and receiver is known and fixing, therefore microprocessing unit just can calculate the gas medial temperature in the path between transmitter and receiver by measuring the travel-time of voice signal.
Claims (7)
1. a temperature measuring device for hearth, is characterized in that: mainly by pinger, acoustic receiver, transmission signal amplifying circuit, reception signal amplification circuit, launch microphone, receive microphone, the modulate circuit that transmits, receiving signal reason circuit, micro-control unit and liquid crystal display form; Pinger and acoustic receiver are respectively arranged on the furnace wall of boiler by a conduit, and pinger and acoustic receiver are oppositely arranged, and divide the both sides that are in boiler; Micro-control unit connects the control end of pinger through transmission signal amplifying circuit, micro-control unit connects the control end of acoustic receiver through receiving signal amplification circuit; Transmitting microphone is arranged in the conduit between pinger and boiler, receives microphone and is arranged in the conduit between acoustic receiver and boiler; Micro-control unit connects transmitting microphone through the modulate circuit that transmits, and micro-control unit connects and receives microphone through receiving signal reason circuit; Liquid crystal display is connected on micro-control unit.
2. a kind of temperature measuring device for hearth according to claim 1, is characterized in that: the number of described pinger and acoustic receiver equates or be unequal.
3. a kind of temperature measuring device for hearth according to claim 1 and 2, it is characterized in that: in the time that the transverse section of boiler is quadrilateral, the number of described pinger is 4, the number of described acoustic receiver is 8, wherein 4 pingers are arranged on respectively the middle part in 4 sidelines of boiler, and 8 acoustic receivers are arranged on respectively the both sides of 4 corners of boiler.
4. a kind of temperature measuring device for hearth according to claim 1, is characterized in that: described transmission signal amplifying circuit and reception signal amplification circuit are by low noise voltage feedback amplifier, precision operational-amplifier and digital to analog converter composition; The output terminal of digital to analog converter is connected with the input end of low noise voltage feedback amplifier through precision operational-amplifier; Wherein transmission signal amplifying circuit is connected micro-control unit with the input end of the digital to analog converter that receives signal amplification circuit simultaneously; The output terminal of the low noise voltage feedback amplifier of transmission signal amplifying circuit connects pinger, and the output terminal that receives the low noise voltage feedback amplifier of signal amplification circuit connects acoustic receiver.
5. a kind of temperature measuring device for hearth according to claim 1, is characterized in that: described in transmit modulate circuit and receiving signal reason circuit by low noise field effect transistor input operational amplifier, low noise voltage feedback amplifier and comparer composition; The output terminal of low noise field effect transistor input operational amplifier connects the input end of comparer through low noise voltage feedback amplifier; The input end of low noise field effect transistor input operational amplifier of modulate circuit of wherein transmitting connects micro-control unit, and the output terminal of the comparer of the modulate circuit that transmits connects transmitting microphone; The input end of the low noise field effect transistor input operational amplifier of receiving signal reason circuit connects reception microphone, and the output terminal of the comparer of receiving signal reason circuit connects micro-control unit.
6. a kind of temperature measuring device for hearth according to claim 1, is characterized in that: also further comprise host computer, this host computer is connected with micro-control unit through serial communication bus.
7. a kind of temperature measuring device for hearth according to claim 6, is characterized in that: described serial communication bus is RS485 bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420502114.1U CN204007929U (en) | 2014-09-02 | 2014-09-02 | A kind of temperature measuring device for hearth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420502114.1U CN204007929U (en) | 2014-09-02 | 2014-09-02 | A kind of temperature measuring device for hearth |
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| CN204007929U true CN204007929U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420502114.1U Expired - Fee Related CN204007929U (en) | 2014-09-02 | 2014-09-02 | A kind of temperature measuring device for hearth |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105549645A (en) * | 2016-01-25 | 2016-05-04 | 王晶怡 | Cold closet temperature control method based on sound wave temperature measurement |
| CN106706156A (en) * | 2017-01-11 | 2017-05-24 | 华北电力大学 | Ultrasonic-based boiler furnace smoke temperature measuring device |
| CN108240873A (en) * | 2018-01-29 | 2018-07-03 | 山西华仁通电力科技有限公司 | A kind of station boiler sound wave thermometric sending device |
| CN113916397A (en) * | 2021-09-30 | 2022-01-11 | 陕西岱南新能源工程有限公司 | Furnace temperature measurement system |
-
2014
- 2014-09-02 CN CN201420502114.1U patent/CN204007929U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105549645A (en) * | 2016-01-25 | 2016-05-04 | 王晶怡 | Cold closet temperature control method based on sound wave temperature measurement |
| CN105549645B (en) * | 2016-01-25 | 2017-07-18 | 民权县质量技术监督检验测试中心 | A kind of refrigerated case temperature control method based on sound wave thermometric |
| CN106706156A (en) * | 2017-01-11 | 2017-05-24 | 华北电力大学 | Ultrasonic-based boiler furnace smoke temperature measuring device |
| CN108240873A (en) * | 2018-01-29 | 2018-07-03 | 山西华仁通电力科技有限公司 | A kind of station boiler sound wave thermometric sending device |
| CN113916397A (en) * | 2021-09-30 | 2022-01-11 | 陕西岱南新能源工程有限公司 | Furnace temperature measurement system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20141210 Termination date: 20160902 |