CN104914298A - Power measurement device for radio frequency calorimeter - Google Patents
Power measurement device for radio frequency calorimeter Download PDFInfo
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- CN104914298A CN104914298A CN201510303200.9A CN201510303200A CN104914298A CN 104914298 A CN104914298 A CN 104914298A CN 201510303200 A CN201510303200 A CN 201510303200A CN 104914298 A CN104914298 A CN 104914298A
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- electric bridge
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Abstract
The invention discloses a power measurement device for a radio frequency calorimeter. The device comprises a first electric bridge and a second electric bridge which are connected in series with each other; any one bridge arm on the first electric bridge and any one bridge arm on the second electric bridge are provided with a temperature acquisition area respectively. The device of the invention has the advantages of structural simplicity, high stability and excellent power response. With the power measurement device adopted, the accuracy of the radio frequency calorimeter can achieve 0.025%. The device can be widely applied to radio frequency calorimeters or microwave calorimeters which require high measurement accuracy and equipment which has the same requirements.
Description
Technical field
The present invention relates to bridge technology field.More specifically, a kind of resistance bridge device for radio frequency calorimeter is related to.
Background technology
Along with the high speed development of science and technology, there is new high-end electronic device, the accuracy requirement of radio-instrument is also higher, also impels radio survey technology to develop towards higher level, and the standard device wherein for calibration measurement instrument also needs higher accuracy.And power measurement is one of parameter the most basic in radio frequency and microwave regime.At present, for meeting industrial technology and economy development requirement, each state is all developing the frequency microwave power reference of pin-point accuracy of oneself, and frequency range is more and more wider, measuring accuracy and power range also more and more higher.Radio frequency calorimeter or microcalorimeter because its accuracy is high by extensively in order to set up national frequency microwave power standard even benchmark, it substitutes the measuring principle of RF/Microwave power based on direct current, the equivalent heat of pull-up resistor to DC power and radio-frequency power is utilized to respond, by measuring the temperature variation after absorbing direct current or radio-frequency power, draw the value of measured power according to temperature variation.
Wherein the detection of temperature variation needs to adopt a kind of sensor, traditional this kind of sensor for calorimeter adopts thermopair to be built into the form of thermoelectric pile, the temperature variation of detection is converted to thermoelectrical potential to export, it is exactly the version adopting thermoelectric pile that the calorimeter as some quantitative study mechanisms development both at home and abroad exports; This thermopile structure adopts cold and hot Node configuration, and inside selects multipair thermopair to combine, and output power sensitivity is about 30 μ V/mW ~ 100 μ V/mW, and conventional thermocouple material has nickel chromium triangle-Kao copper, nickel chromium triangle-zinc-copper, bismuth antimony etc.The structure that this form needs design unique, different processes requirements is had to different calorimeter structures, and it is higher to circuit requirement, not there is certain versatility, and along with the high speed development of sensor process technology, occurred more easily processing than thermopair and the higher platinum sensor of temperature detecting precision.
At present in RF/Microwave power measurement, especially in the design ap-plication of metering level device radio frequency calorimeter, also there is not the design adopting platinum sensor structure.Radio frequency calorimeter majority adopts two support structures, and using the pedestal of pull-up resistor structure as calorimetric body, and two support structures can effectively suppress variation of ambient temperature on the impact of calorimeter, necessarily requires the sensor responding to height being used in calorimetric body consistent simultaneously.
Therefore, need to provide a kind of novel radio frequency calorimeter measurement mechanism, to meet the requirement of electric thermo-couple temperature detection property.
Summary of the invention
The object of the invention is to provide a kind of power-measuring device for radio frequency calorimeter, while the accuracy of measurement ensureing radio frequency calorimeter, and the stability of holding device work.
For achieving the above object, the present invention adopts following technical proposals:
For a power-measuring device for radio frequency calorimeter, this device comprises the first electric bridge and the second electric bridge that are connected in series, and the arbitrary brachium pontis on described first electric bridge and the arbitrary brachium pontis on the second electric bridge are respectively equipped with temperature acquisition district.
Preferably, described temperature acquisition district comprises matrix and film platinum resistor, described film platinum resistor be with sputtering technology uniform fold on the surface of matrix.
Preferably, the covering shape of described film platinum resistor on matrix is discoid.
Preferably, described matrix is the nonmetallic materials of high heat conduction.
Preferably, described temperature acquisition district comprises the cylindrical metal load seat for carry load further.
Preferably, the side contrary with film platinum resistor of described matrix is inlaid with the nonmetal U-shaped plate of low heat conduction, and the opening direction of this nonmetal U-shaped plate is towards film platinum resistor direction.
Preferably, on the first electric bridge and the second electric bridge temperature acquisition district matrix between be connected in series by lead-in wire.
Preferably, the electric bridge in the non-temperature acquisition district of described first electric bridge and the second electric bridge is equipped with High Accuracy Constant Temperature direct current resistance.
Preferably, this device comprises PCB substrate further, High Accuracy Constant Temperature direct current resistance on described first electric bridge and the second electric bridge is fixed in PCB substrate, and on the matrix of the first electric bridge, film platinum resistor arranges Constant current input end, and on the matrix of the second electric bridge, film platinum resistor arranges output terminal.
Preferably, four-wire system connection is adopted to arrange by the lead-in wire of film platinum resistor extraction or introducing on matrix in described first electric bridge and the second electric bridge.
Beneficial effect of the present invention is as follows:
Structure of the present invention is simple, stability is high, there is extraordinary power response linear convergent rate, make the accuracy of radio frequency calorimeter reach 0.025%, the radio frequency calorimeter or microwave calorimeter that need high-acruracy survey can be widely used in, and have on the equipment of similar demand.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 illustrates the structural representation of apparatus of the present invention.
In figure, 1-first load seat, 2-second load seat, 3-first platinum resistance temperature sensor, 4-second platinum resistance temperature sensor, 5-Constant current input end, 6-resistance bridge module
Embodiment
In order to be illustrated more clearly in the present invention, below in conjunction with preferred embodiments and drawings, the present invention is described further.Parts similar in accompanying drawing represent with identical Reference numeral.It will be appreciated by those skilled in the art that specifically described content is illustrative and nonrestrictive, should not limit the scope of the invention with this below.
Main thought of the present invention utilizes the power of the combination radio frequency calorimeter of two electric bridges to measure, in technical scheme wherein using platinum resistance as the arm of in electric bridge.Radio frequency calorimeter adopts two support structures, and the present invention devises a pair platinum resistance temperature sensor of equal performance; In order to make the platinum resistance temperature sensor on two load, there is identical response, a pair platinum resistance temperature sensor is cascaded by the present invention, give the electric current that input is identical, by measuring the voltage differences of two platinum resistance ends, realizing converting the temperature contrast that platinum resistance temperature sensor is responded to voltage and exporting.The present invention is different from the platinum resistance structure of common use, and designed platinum resistance temperature sensor adopts film like structures; In order to keep the electric isolution with load pedestal, the platinum resistance temperature sensor structural outside layers of the present invention's design uses the nonmetallic materials of the such as graphite of good heat conductivity, its specific practice is for sputter in nonmetallic materials by platinum resistance uniform composition, form certain resistance value, its profile is as discoid; In order to reduce the resistance measurement error that additional plain conductor is introduced, four lines the lead design at platinum resistance two ends in collective are become to export.Load pedestal of the present invention is cylindric, and its heat absorbed mainly concentrates the present end, and load pedestal is metalwork.
As shown in Figure 1, a kind of power-measuring device for radio frequency calorimeter, this device comprises the first electric bridge and the second electric bridge that are connected in series, arbitrary brachium pontis on described first electric bridge and the arbitrary brachium pontis on the second electric bridge are respectively equipped with temperature acquisition district, described temperature acquisition district comprises matrix and film platinum resistor, described film platinum resistor be with sputtering technology uniform fold on the surface of matrix.Wherein, the covering shape of described film platinum resistor on matrix is discoid; State the nonmetallic materials that matrix is high heat conduction.Described temperature acquisition district comprises the cylindrical metal load seat for carry load further.The present invention is inlaid with the nonmetal U-shaped plate of low heat conduction in the side contrary with film platinum resistor of described matrix, and the opening direction of this nonmetal U-shaped plate is towards film platinum resistor direction.On first electric bridge and the second electric bridge temperature acquisition district matrix between be connected in series by lead-in wire.The electric bridge in the non-temperature acquisition district of the first electric bridge of the present invention and the second electric bridge is equipped with High Accuracy Constant Temperature direct current resistance.This device comprises PCB substrate further, and the High Accuracy Constant Temperature direct current resistance on described first electric bridge and the second electric bridge is fixed in PCB substrate, the matrix of the first electric bridge arranges Constant current input end, the matrix of the second electric bridge arranges output terminal.
Below by one group of example, the invention will be further described:
As shown in Figure 1, a kind of power-measuring device for radio frequency calorimeter, this device can realize the radio frequency calorimeter power measurement of pin-point accuracy, is made up of load seat platinum resistance temperature sensor structure and four-wire method resistance bridge structure.This device comprises the electric bridge of two series connection, wherein said load seat platinum resistance temperature sensor vibrational power flow formation temperature acquisition zone on an arm of each electric bridge, this load seat platinum resistance temperature sensor structure is made up of three parts, is respectively matrix, film platinum resistor and lead-in wire.Matrix adopts the nonmetallic materials of high heat conduction, adopts sputtering technology on matrix, be made into discoidal film platinum resistance material, and arranges two lead-in wires at the two ends of matrix respectively.Wherein the size of matrix depends on the size of radio frequency calorimeter load seat, in order to strengthen the thermometric effect of load seat platinum resistance temperature sensor, inlays the nonmetal collar of low heat conduction outside the matrix of load seat platinum resistance temperature sensor.
Described four-wire method resistance bridge structure is divided into three parts, High Accuracy Constant Temperature direct current resistance in above-mentioned two electric bridges is separately positioned in PCB substrate, and input and output lead end is set on base material, input lead end is connected with film platinum resistor in first electric bridge, output lead end is connected with film platinum resistor in second electric bridge, and input and output lead-in wire adopts four-wire method to connect.In Fig. 1, the tie point on the right of two electric bridges is connected with pcb board, forms the loop measuring film platinum resistor two ends change voltage.
The concrete operation step of apparatus of the present invention is as follows: platinum resistance temperature sensor 3 and 4 becomes an arm of electric bridge separately as platinum resistance, extraction four wires are passed through to the precision measurement of the resistance of platinum resistance temperature sensor 3 and 4, adopts four-wire method bridge measurement technology to carry out.In order to the platinum resistance temperature sensor 3 and 4 on the first load seat and the second load seat has identical response, platinum resistance temperature sensor 3 and 4 is cascaded, identical electric current is inputted from Constant current input end 5, by measuring the voltage differences at two platinum resistance temperature sensor two ends respectively, realizing converting the temperature contrast that platinum resistance temperature sensor is responded to voltage and exporting.
The present invention proves by carrying out experiment on radio frequency calorimeter power measurement, the platinum resistance electric bridge output power sensitivity of the present invention's design is about 300 μ V/mW, and there is extraordinary power response linear convergent rate in certain power bracket, the accuracy achieving radio frequency calorimeter reaches 0.025%.
In sum, structure of the present invention is simple, stability is high, has extraordinary power response linear convergent rate, makes the accuracy of radio frequency calorimeter reach 0.025%, the radio frequency calorimeter or microwave calorimeter that need high-acruracy survey can be widely used in, and have on the equipment of similar demand.
Obviously; the above embodiment of the present invention is only for example of the present invention is clearly described; and be not the restriction to embodiments of the present invention; for those of ordinary skill in the field; can also make other changes in different forms on the basis of the above description; here cannot give exhaustive to all embodiments, every belong to technical scheme of the present invention the apparent change of extending out or variation be still in the row of protection scope of the present invention.
Claims (10)
1. for a power-measuring device for radio frequency calorimeter, it is characterized in that, this device comprises the first electric bridge and the second electric bridge that are connected in series, and the arbitrary brachium pontis on described first electric bridge and the arbitrary brachium pontis on the second electric bridge are respectively equipped with temperature acquisition district.
2. power-measuring device according to claim 1, is characterized in that: described temperature acquisition district comprises matrix and film platinum resistor, described film platinum resistor be with sputtering technology uniform fold on the surface of matrix.
3. power-measuring device according to claim 2, is characterized in that: the covering shape of described film platinum resistor on matrix is discoid.
4. power-measuring device according to claim 2, is characterized in that: described matrix is the nonmetallic materials of high heat conduction.
5. power-measuring device according to claim 2, is characterized in that: described temperature acquisition district comprises the cylindrical metal load seat for carry load further.
6. power-measuring device according to claim 2, is characterized in that: the side contrary with film platinum resistor of described matrix is inlaid with the nonmetal U-shaped plate of low heat conduction, and the opening direction of this nonmetal U-shaped plate is towards film platinum resistor direction.
7. power-measuring device according to claim 2, is characterized in that: on the first electric bridge and the second electric bridge temperature acquisition district matrix between be connected in series by lead-in wire.
8. power-measuring device according to claim 7, is characterized in that: the electric bridge in the non-temperature acquisition district of described first electric bridge and the second electric bridge is equipped with High Accuracy Constant Temperature direct current resistance.
9. power-measuring device according to claim 8, it is characterized in that: this device comprises PCB substrate further, High Accuracy Constant Temperature direct current resistance on described first electric bridge and the second electric bridge is fixed in PCB substrate, on the matrix of the first electric bridge, film platinum resistor arranges Constant current input end, and on the matrix of the second electric bridge, film platinum resistor arranges output terminal.
10. power-measuring device according to claim 9, is characterized in that: adopt four-wire system connection to arrange by the extraction of film platinum resistor on matrix or the lead-in wire of introducing in described first electric bridge and the second electric bridge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510303200.9A CN104914298A (en) | 2014-12-30 | 2015-06-05 | Power measurement device for radio frequency calorimeter |
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| CN201410840647 | 2014-12-30 | ||
| CN2014108406475 | 2014-12-30 | ||
| CN201510303200.9A CN104914298A (en) | 2014-12-30 | 2015-06-05 | Power measurement device for radio frequency calorimeter |
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| CN104914298A true CN104914298A (en) | 2015-09-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388443A (en) * | 2015-12-23 | 2016-03-09 | 北京无线电计量测试研究所 | Linear feedback self-regulation system for calorimetric power meter |
| CN106768493A (en) * | 2016-12-04 | 2017-05-31 | 中国科学院工程热物理研究所 | A kind of film TR heat flow transducer of series-fed |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101126780A (en) * | 2007-10-12 | 2008-02-20 | 核工业西南物理研究院 | M-w grade microwave power instrumentation system based on calorimetric method |
| CN102494808A (en) * | 2011-11-21 | 2012-06-13 | 中国计量科学研究院 | Microcalorimeter, power reference system utilizing microcalorimeter and measuring method |
| CN104155512A (en) * | 2014-08-19 | 2014-11-19 | 北京无线电计量测试研究所 | Calorimetric load base for RF power measurement |
| CN204165669U (en) * | 2014-08-20 | 2015-02-18 | 北京无线电计量测试研究所 | A kind of temperature voltage conversion equipment for rf power measurement |
-
2015
- 2015-06-05 CN CN201510303200.9A patent/CN104914298A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101126780A (en) * | 2007-10-12 | 2008-02-20 | 核工业西南物理研究院 | M-w grade microwave power instrumentation system based on calorimetric method |
| CN102494808A (en) * | 2011-11-21 | 2012-06-13 | 中国计量科学研究院 | Microcalorimeter, power reference system utilizing microcalorimeter and measuring method |
| CN104155512A (en) * | 2014-08-19 | 2014-11-19 | 北京无线电计量测试研究所 | Calorimetric load base for RF power measurement |
| CN204165669U (en) * | 2014-08-20 | 2015-02-18 | 北京无线电计量测试研究所 | A kind of temperature voltage conversion equipment for rf power measurement |
Non-Patent Citations (2)
| Title |
|---|
| CHUANZHONG XU 等: "Type N RF Calorimeter In Coaxial Line", 《2014 3RD ASIA-PACIFIC CONFERENCE ON ANTENNAS AND PROPAGATION》 * |
| LIN YANG 等: "Design of a High-precision Temperature-Voltage Converting Circuit Applied to RF Power Calorimeter", 《2014 3RD ASIA-PACIFIC CONFERENCE ON ANTENNAS AND PROPAGATION》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388443A (en) * | 2015-12-23 | 2016-03-09 | 北京无线电计量测试研究所 | Linear feedback self-regulation system for calorimetric power meter |
| CN106768493A (en) * | 2016-12-04 | 2017-05-31 | 中国科学院工程热物理研究所 | A kind of film TR heat flow transducer of series-fed |
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Application publication date: 20150916 |