CN202533180U - Novel modified infrared thermometer - Google Patents
Novel modified infrared thermometer Download PDFInfo
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- CN202533180U CN202533180U CN2012201509890U CN201220150989U CN202533180U CN 202533180 U CN202533180 U CN 202533180U CN 2012201509890 U CN2012201509890 U CN 2012201509890U CN 201220150989 U CN201220150989 U CN 201220150989U CN 202533180 U CN202533180 U CN 202533180U
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- infrared thermometer
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Abstract
The utility model relates to a novel modified infrared thermometer. The novel modified infrared thermometer comprises an outer shell, a back cover and a thermometry system arranged inside the outer shell, wherein the outer shell comprises a barrel-shaped body, a signal inlet and an opening, the signal inlet is a cylindrical inlet, is located at one end of the barrel-shaped body and extends outwards, the diameter of the signal inlet is smaller than that of the body so that a ladder shape is formed, the opening is located on the other end of the barrel-shaped body and covered by the back cover, and the thermometry system is arranged inside the barrel-shaped body. The novel modified infrared thermometer is simple in structure, convenient to operate, and capable of being used in different application occasions and eliminating measurement errors or weak signal resolution. In addition, close limit parameters of a sensitive element can be used to a greater extent, measuring range of the thermometer is increased, and measuring accuracy is improved.
Description
Technical field
The utility model relates to the measurement instrument field of measuring temperature, relate in particular to a kind of can automatic zero set (AZS) and have a new and improved infrared thermometer of high measurement accuracy.
Background technology
Whether the measurement method of temperature is a lot, contact with measured medium according to measuring body to be divided into two big types of contacting temperature measurement method and contactless temperature-measuring methods.
The characteristics of contacting temperature measurement method are that temperature element directly contacts with measurand; Carry out sufficient heat interchange between the two; Reach thermal equilibrium at last; At this moment the value of a certain physical parameter of temperature-sensing element has just been represented the temperature value of measurand, and the advantage of contact temperature-measuring method is intuitive and reliable, and shortcoming is the distribution that temperature-sensing element influences the dut temperature field; Loose contacts etc. all can bring measuring error, and temperature is too high in addition can have a negative impact with the performance and the life-span of Korrosionsmedium to temperature-sensing element.
Do not contact and the characteristics of non-contact thermometry are temperature-sensing elements, carry out heat interchange through radiation as the one of which,, have the higher thermometric upper limit so can avoid the shortcoming of contact thermometry with measurand.In addition; The non-contact thermometry thermal inertia is little; Can reach signa; Be convenient to measure the temperature and the fast-changing temperature of moving object, but this non-contact temperature measuring method since the emissivity, measurand that receives object to the influence of other media such as the distance between the instrument and flue dust, steam, general temperature measurement error is bigger.According to these two kinds of temp measuring methods, temperature instrumentation also can be divided into contact temperature-measuring instrument and contactless temperature-measuring instrument.
Infrared thermometer belongs to the instrument of contactless temperature-measuring, and it comes the Measuring Object temperature through the infrared radiation of surveying object, and infrared thermometer commonly used is generally by object lens; Optical filter, sensitive element (photoelectric conversion sensor), analogue amplifier; The A/D conversion, data normalization and linearity correction, output is formed; Has wide, easy to use or the like the advantage of non-cpntact measurement, strong anti-electromagnetic interference (EMI), range ability; Be used in commercial production widely, but it receives the influence of sensitive element (for example photoelectric conversion sensor) self detectivity of measuring temperature easily, be difficult to guarantee to eliminate measuring error in different use occasions; And range ability also receives the restriction of sensitive element easily, and precision also is affected easily.
For this reason, the deviser of the utility model is because above-mentioned defective through concentrating on studies and designing, comprehensively is engaged in for a long time the experience and the achievement of related industry for many years, and research and design goes out a kind of new and improved infrared thermometer, to overcome above-mentioned defective.
Summary of the invention
The purpose of the utility model is to provide a kind of new and improved infrared thermometer; It is simple in structure, and is easy to operate, can be used for different use occasions; Eliminating measuring error or weak signal differentiates; Can use the near limit parameter of sensitive element greatly, increase the range ability of temperature measurer, improve measuring accuracy.
For realizing above-mentioned purpose, the utility model discloses a kind of new and improved infrared thermometer, this infrared thermometer comprises shell, bonnet and is arranged at the temp measuring system in the shell, it is characterized in that:
This shell comprises cylindrical body, signal input port and opening; This signal input port is the cylindrical shape inlet; It is positioned at an end of cylindrical body and stretches out; It is stepped that thereby the diameter of this signal input port forms less than the diameter of body, and this opening is positioned at the other end of cylindrical body and is covered by bonnet, and the set inside of this cylindrical body has this temp measuring system.
Wherein: this temp measuring system comprises control system, optical fiber diode, spectroscope, optical fiber tube and lens; Said lens are arranged in the said signal input port; Said spectroscope is obliquely installed in said lens rear; Said optical fiber diode is connected in an end of said optical fiber tube, and the other end of said optical fiber tube is arranged at said spectroscopical rear, and control system is connected to the optical fiber diode to receive signal.
Wherein: this temp measuring system also includes laser instrument, and said laser instrument is positioned at said spectroscopical top.Wherein: this bonnet comprises cylindrical portion, cap and socket; One end of said cylindrical portion is connected to the opening of said cylindrical body; The other end is covered by said cap; Said cap is provided with and is connected to external power supply so that the socket of electric power to be provided, and the control system of said temp measuring system is arranged in the cylindrical portion.Wherein: also be provided with the viewing area of displays temperature numerical value and the button operation district that supplies user's operation on the said cap.
Through said structure, the utlity model has following technique effect:
1, adopted fibre bundle to carry out filtering signals, the use of this fibre bundle can make the infra-red heat energy of entering be filtered, and unattenuated signal, thereby the defective of having avoided the optical fiber diode to cause owing to temperature is too high has guaranteed the stability and the accuracy that detect.
2, in control, introduced the application of automatic zero set (AZS) in data processing, and measures ambient temperature parameter participation data processing, detector responsivity and accuracy further improved;
3, operational amplifier adjustable gain circuit has strengthened the measuring accuracy and the antijamming capability of equipment, has expanded the measurement range of equipment;
4, the infrared measurement of temperature equipment of the utility model can be configured to multiple output mode, is applicable to various environment.The detailed content of the utility model can through after explanation and the institute's accompanying drawing stated obtain.
Description of drawings
Fig. 1 has shown the structural representation of the new and improved infrared thermometer of the utility model.
Fig. 2 has shown the control system synoptic diagram of the new and improved infrared thermometer of the utility model.
Fig. 3 has shown the processing flow chart of the new and improved infrared thermometer of the utility model.
Reference numeral:
1 measurement module; 2 communication modules; The 3I2C circuit; 4 light-sensitive detectors; 5 zeroing modules; 6 sample circuits; 7 processor modules; 8 display modules; 9 press key processing module; 10 power modules; 11 relays; 12 laser instrument control modules; 13 output modules; 21 shells; 22 bonnets; 23 optical fiber diodes; 24 spectroscopes; 25 optical fiber tubes; 26 lens; 27 laser instruments; 211 cylindrical body; 212 signal input ports; 213 openings; 221 cylindrical portion; 222 caps; 223 sockets; 224 viewing areas; 225 button operation districts.
Embodiment
Referring to Fig. 1, shown the structural representation of the new and improved infrared thermometer of the utility model, this infrared thermometer comprises shell 21, bonnet 22 and is arranged at the temp measuring system in the shell 21.
Wherein, This shell 21 comprises cylindrical body 211, signal input port 212 and opening 213; This signal input port 212 is the cylindrical shape inlet, and it is positioned at an end of cylindrical body 211 and stretches out, thereby the diameter of this signal input port 212 forms stepped less than the diameter of body 211; This opening 213 is positioned at the other end of cylindrical body 211 and is covered by bonnet 22, and the set inside of this cylindrical body 211 has this temp measuring system.
Wherein, This temp measuring system comprises control system, optical fiber diode 23, spectroscope 24, optical fiber tube 25, lens 26 and laser instrument 27; Said lens 26 are arranged in the said signal input port 211; Said spectroscope 24 is obliquely installed in said lens 26 rears, and said laser instrument 27 is positioned at the top of said spectroscope 24, and said optical fiber diode 23 is connected in an end of said optical fiber tube 25; The other end of said optical fiber tube 25 is arranged at the rear of said spectroscope 24, and control system is connected to optical fiber diode 23 to receive signal.Setting through above-mentioned each structure; When the signal input port 212 of the utility model was aimed at testee, the infrared signal line of testee radiation transmitted the back through said optical fiber tube 25 and is received by said optical fiber diode 23 through said lens 26 and said spectroscope 24; And convert light signal into electric signal; After handling through control system, temperature-voltage (electric current) signal that output is linear, the final purpose that realizes measuring temperature.
And can aim at testee for the signal input port 212 that makes temperature measurer; To on time; Drive laser 27 produces laser (preferably can be red laser), and said laser forms laser beam after said spectroscope 24 converges, and this laser beam is preferably the laser beam that diameter is 2mm; After this laser beam is aimed at testee, can reach the purpose that makes signal input port 212 aim at testee.
Simultaneously, the use of said fibre bundle 25 in temperature measurer can further improve the detectivity and the stability of said optical fiber diode.In existing infrared temperature measurement system; After the direct scioptics of the infrared signal of the radiation of common measured target converged, the energy centralization of infrared signal was on the optical fiber diode, when measuring high temperature (the especially temperature more than 1500 ℃); The optical fiber diode is because the influence of thermonoise; Cause its detectivity to descend, electric current increases, bad stability.So the utility model has adopted fibre bundle to carry out filtering signals; The use of this fibre bundle can make the infra-red heat energy of entering be filtered; And unattenuated signal, thereby the defective of having avoided the optical fiber diode to cause owing to temperature is too high has guaranteed the stability and the accuracy that detect.Wherein, This bonnet 22 comprises cylindrical portion 221, cap 222, socket 223 and viewing area 224; One end of said cylindrical portion 221 is connected to the opening 213 of said cylindrical body 211; The other end is covered by said cap 222; Said cap 222 is provided with and is connected to the socket 223 of external power supply so that electric power to be provided, and also is provided with the viewing area 224 of displays temperature numerical value and the button operation district 225 that supplies user's operation on the said cap 222, and the control system of said temp measuring system is arranged in the cylindrical portion 221.
Referring to Fig. 2, shown the control system synoptic diagram of the new and improved infrared thermometer of the utility model, this control system comprises power module, sampling module, output module, display control module and processor module.
Said power module 10 provides power supply for system; Its positive 24V power source conversion with the outside input becomes positive and negative 8V, positive 5V, positive 3.3V power supply; Said power module 10 includes A2412S, 78M08,79L08,78L05 and LM1117 at least; Said A2412S is used for the positive 24V power source conversion of outside input is become positive and negative 12V; The output of said AS2412 is connected to the input of 78M08 and 79L08 respectively, and said 78M08 is used for becoming positive 8V power supply to offer the amplifier use of AD sampling the positive 12V voltage transitions of A2412S output, and said 79L08 is used for becoming negative 8V power supply to offer the amplifier use of AD sampling the negative 12V voltage transitions of A2412S output.The output that the input of said 78L05 is connected to A2412S becomes positive 5V power supply to offer AD420 (output module) use with the positive 12V power source conversion with A2412S output; The input of said LM1117 links to each other with the output of 78M08 and becomes positive 3.3V power supply with the positive 8V power source conversion that 78M08 is produced, and this power supply offers digital device and uses.
Said sampling module includes light-sensitive detector 4, zeroing module 5, sample circuit 6 and measurement module 1 at least; Said light-sensitive detector 4 converts light signal into electric signal; Its output is connected to the input of zeroing module 5; This zeroing module 5 is made up of amplifying circuit and 2 4066 analog switching circuits of 4 OP07; The multistage amplification of the electric signal that it has realized light-sensitive detector 4 is generated and to the zeroing of circuit; The negative input of first OP07 wherein is connected directly to the output of light-sensitive detector 4, thereby changes the current signal of opto-electronic conversion into a voltage signal v1, and said measurement module 1 includes chip ADT7301 to obtain the temperature of working environment; Processor module is according to the temperature computation zeroing polarity of voltage and the size of said working environment; Utilize a zeroing of processor module output voltage v2, second OP07 of said zeroing module 5 utilizes this zeroing voltage v2 to realize the zeroing work to circuit, and its principle is the negative input end that the pressure regulation voltage v2 of processor module is input to second OP07; Said second OP07 generates the inversion signal v3 that grade is big with this signal; Should return to zero voltage v2 and inversion signal v3 is input in first 4066 analog switching circuit, and processor module realizes that through controlling this analog switch said voltage signal v1 and offset signal v4 enter into by the 3rd adding circuit that OP07 forms to offset signal v4 that can just can bear of circuit output; Realized zeroing work to circuit; And generate voltage v5 after the zeroing, and voltage v5 enters into to be amplified by the 4th OP07 and second 4066 variable-gain amplification circuit of forming and generates an amplifying signal v6 after the said zeroing, and said amplifying signal v6 flows to sample circuit 6 and samples; It is the AD sample circuit of core with ADS7825 that said sample circuit is one, and said ADS7825 converts amplifying signal v6 to one 16 digital quantity to offer the temperature that processor module calculates testee.
It is the DA circuit of core with AD420 that said output module 13 is one, and the processing and utilizing sampling module calculates after the temperature, uses analog quantity of said output module 13 outputs.The temperature that processor module calculates according to amplifying signal v6 is input among the AD420 through SPI with the form of one 16 bit data, and AD420 converts this digital signal to a simulating signal.Simulating signal comprises 0-5v, 4-20ma, 0-20ma and four kinds of forms of 0-24ma.
Said display control module is by display module 8, form by key processing module 9, relay 11, laser instrument control module 12, I2C circuit 3 and communication module 2.Said display module 8 is made up of with displays temperature numerical value the charactron of quaternity; Comprise a plurality of buttons to realize manual control by key processing module 9, the control pin of relay 11 directly links to each other to realize switch control with the general pin of processor module; The switch pin of laser instrument control module 12 directly links to each other to realize that emission laser is used for aiming with processor module; I2C circuit 3 comprises 24C02, and said 24C02 directly links to each other to realize preserving the function of data with the I2C multiplexing pins of processor module.
Wherein, control system also can comprise communication module 2, and this communication module 2 comprises 83485, and said communication module 2 directly links to each other to realize the function of 458 communications with the multiplexing USART pin of processor module.The said processor module 7 main processing of being responsible for The whole control system; This processor module comprises processor chips, reset circuit and crystal oscillating circuit at least; Said processor chips are STM32F103, and each module of said processor chips and other links to each other to realize the purpose of control The whole control system.The multiplexing SPI pin of processor chips links to each other with the temperature of surveying work environment with measurement module 1; The general pin of processor chips and the function that links to each other by key processing module 9 with the realization manual control device, the general pin of processor chips link to each other with display module 8 to realize the function of displays temperature numeral; The multiplexing SPI pin of processor chips links to each other with output module 13 to export an analog quantity; The general pin of processor chips links to each other with laser instrument control module 12 to realize the function of control laser instrument; The general pin of processor chips links to each other with relay 11 to realize the function of switch control; The DA output pin of processor chips links to each other with zeroing module 5 to realize zeroing control; The general pin of processor chips is connected with sample circuit 6 to realize reading the function of AD sampled value.
Behind the processor chips electrification reset, processor chips initialization peripheral hardware and systematic parameter, automatic zero set (AZS) shows output.The groundwork of initialization peripheral hardware is the duty of initialization peripheral hardware, comprises the pattern of exporting analog quantity, the switch of relay, the switch of laser instrument etc.The initialization system parameter mainly is the running parameter of the system of configuring in the thermometric process, utilizes I2C circuit 3 stocking system parameters, during initialization from I2C circuit 3 reading system parameter, configuration-system parameter then.Systematic parameter comprises emissivity, filter factor, mode of operation or the like.Automatic zero set (AZS) is the temperature of utilizing module 1 surveying work environment; Judge the polarity and the size that calculates zeroing voltage of zeroing voltage according to this Temperature Treatment device; And utilize the DAC in the processor bias voltage to be provided to sample circuit; Thereby reduce the influence of temperature, strengthened the equipment antijamming capability measuring accuracy.Measuring with output is to utilize photosensitive device to realize that opto-electronic conversion obtains voltage; And utilize amplifier to carry out multistage amplification; Use sample circuit 6 that this voltage transitions is become a digital quantity at last, system utilizes this digital quantity to calculate a temperature, obtains a filtering temperature through software filtering; And, use display module 8 to show the filtering temperature then through output module 13 one of output and the corresponding analog quantitys of filtering temperature.The processor program process flow diagram is (referring to Fig. 3) as follows:
101: electrification reset;
102: initialization CPU, initiating hardware peripheral hardware and systematic parameter;
103: automatic zero set (AZS);
104: accounting temperature;
105: displays temperature, output analog quantity.
The infrared measurement of temperature equipment of the utility model is through automatic zero set (AZS), and variable gain amplifier has strengthened the measuring accuracy and the antijamming capability of equipment, has expanded the measurement range of equipment; And the infrared measurement of temperature equipment of the utility model can be configured to multiple output mode, is applicable to various environment.
It is obvious that, and above description and record only are to give an example rather than disclosure, application or use in order to limit the utility model.Though described and be described in the drawings embodiment in an embodiment; But the optimal mode that the utility model does not limit by the accompanying drawing example and the conduct of describing is in an embodiment thought at present is with the specific examples of the instruction of implementing the utility model, and the scope of the utility model will comprise any embodiment of the instructions that falls into the front and appended claim.
Claims (5)
1. new and improved infrared thermometer, this infrared thermometer comprise shell, bonnet and are arranged at the temp measuring system in the shell, it is characterized in that:
This shell comprises cylindrical body, signal input port and opening; This signal input port is the cylindrical shape inlet; It is positioned at an end of cylindrical body and stretches out; It is stepped that thereby the diameter of this signal input port forms less than the diameter of body, and this opening is positioned at the other end of cylindrical body and is covered by bonnet, and the set inside of this cylindrical body has this temp measuring system.
2. infrared thermometer as claimed in claim 1; It is characterized in that: this temp measuring system comprises control system, optical fiber diode, spectroscope, optical fiber tube and lens; Said lens are arranged in the said signal input port, and said spectroscope is obliquely installed in said lens rear, and said optical fiber diode is connected in an end of said optical fiber tube; The other end of said optical fiber tube is arranged at said spectroscopical rear, and control system is connected to the optical fiber diode to receive signal.
3. infrared thermometer as claimed in claim 2 is characterized in that: this temp measuring system also includes laser instrument, and said laser instrument is positioned at said spectroscopical top.
4. like claim 2 or 3 described infrared thermometers; It is characterized in that: this bonnet comprises cylindrical portion, cap and socket; One end of said cylindrical portion is connected to the opening of said cylindrical body; The other end is covered by said cap, and said cap is provided with and is connected to external power supply so that the socket of electric power to be provided, and the control system of said temp measuring system is arranged in the cylindrical portion.
5. infrared thermometer as claimed in claim 4 is characterized in that: also be provided with the viewing area of displays temperature numerical value and the button operation district that supplies user's operation on the said cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201509890U CN202533180U (en) | 2012-04-11 | 2012-04-11 | Novel modified infrared thermometer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012201509890U CN202533180U (en) | 2012-04-11 | 2012-04-11 | Novel modified infrared thermometer |
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| CN202533180U true CN202533180U (en) | 2012-11-14 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136310A (en) * | 2015-09-06 | 2015-12-09 | 电子科技大学 | Ultraviolet temperature measuring method and apparatus for MOCVD epitaxial wafer surface temperature measurement |
| CN105326479A (en) * | 2015-10-16 | 2016-02-17 | 北京农业智能装备技术研究中心 | Handheld animal body temperature monitoring device and data processing method thereof |
| CN107246915A (en) * | 2017-07-03 | 2017-10-13 | 杭州家和物联技术有限公司 | A kind of infrared temperature probe and its thermometric and transmission method |
| CN107271048A (en) * | 2017-07-03 | 2017-10-20 | 杭州家和物联技术有限公司 | A kind of wireless temperature measurement system and its temp measuring method |
-
2012
- 2012-04-11 CN CN2012201509890U patent/CN202533180U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136310A (en) * | 2015-09-06 | 2015-12-09 | 电子科技大学 | Ultraviolet temperature measuring method and apparatus for MOCVD epitaxial wafer surface temperature measurement |
| CN105136310B (en) * | 2015-09-06 | 2018-07-27 | 电子科技大学 | The ultraviolet temp measuring method and device of MOCVD epitaxy piece surface temperature measurement |
| CN105326479A (en) * | 2015-10-16 | 2016-02-17 | 北京农业智能装备技术研究中心 | Handheld animal body temperature monitoring device and data processing method thereof |
| CN107246915A (en) * | 2017-07-03 | 2017-10-13 | 杭州家和物联技术有限公司 | A kind of infrared temperature probe and its thermometric and transmission method |
| CN107271048A (en) * | 2017-07-03 | 2017-10-20 | 杭州家和物联技术有限公司 | A kind of wireless temperature measurement system and its temp measuring method |
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