CN202256489U - Digital measurement control system of water load heavy-power meter - Google Patents
Digital measurement control system of water load heavy-power meter Download PDFInfo
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- CN202256489U CN202256489U CN2011202616734U CN201120261673U CN202256489U CN 202256489 U CN202256489 U CN 202256489U CN 2011202616734 U CN2011202616734 U CN 2011202616734U CN 201120261673 U CN201120261673 U CN 201120261673U CN 202256489 U CN202256489 U CN 202256489U
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Abstract
The utility model discloses a digital measurement control system of a water load heavy-power meter in the field of power meters. The digital measurement control system comprises a heating resistor unit and a thermocouple pile unit, wherein the heating resistor unit is connected with the output end of a voltage regulating unit, the input end of the voltage regulating unit is connected with the output end of a singlechip through a D/A conversion circuit, the thermocouple pile unit is connected with the input end of a programmable amplification circuit, the output end of the programmable amplification unit is connected with the input end of the singlechip through an A/D conversion circuit, and the singlechip is also connected with a human-machine interface. According to the utility model, the measurement and calibration part is automatically controlled through the singlechip, thus operation is simplified, automation degree is improved, and more accuracy in measurement is realized. The utility model can be used in a water load large power meter.
Description
Technical field
The utility model relates to a kind of power meter, particularly a kind of water load power meter.
Background technology
At present, the measurement of several watts ~ tens kilowatts microwave high power, way the most commonly used is a water load; Measure as terminal type, the resistive heater of in the glass tube of water load, packing into is adorned a focus heap between the water delivering orifice of glass tube and the water inlet; When high frequency power is imported, make water generates temperature difference in the glass tube, thermoelectric pile produces an electromotive force; When input AC performance number resistive heater, make the resistance wire heating, the water generates temperature difference in the glass tube; Thermoelectric pile produces another electromotive force, and when two electromotive force equated, the AC power of input resistive heater was tested high frequency power.
Its weak point is: the measurement of power of the prior art and demonstration, realize that through pointer ammeter its measuring accuracy is low, complicated operation.
The utility model content
The purpose of the utility model provides a kind of digital water load high power meter Measurement and Control System, makes that its measurement is more accurate, and automaticity is high, and is easy and simple to handle.
The purpose of the utility model is achieved in that a kind of digital water load high power meter Measurement and Control System; Comprise heating resistor unit, thermopile unit; Said heating resistor unit links to each other with the output terminal of voltage regulating module; The input end of voltage regulating module links to each other with the output terminal of single-chip microcomputer through the D/A change-over circuit; The thermopile unit links to each other with the input end of programmable amplifying circuit, and the output terminal of programmable amplifying circuit links to each other with the input end of single-chip microcomputer through the A/D change-over circuit, and single-chip microcomputer also links to each other with man-machine interface.
The utility model can be divided into power measurement part and calibrated section; Said power measurement part is in the process that absorbs tested microwave power; The temperature difference of Inlet and outlet water makes thermopile produce electromotive force, and electromotive force converts digital quantity to through the A/D change-over circuit again after programmable amplifying circuit amplifies, deliver to single-chip microcomputer; After the computing of process single-chip microcomputer, the processing, demonstrate measured power by man-machine interface; In the calibrated section course of work; Single-chip microcomputer is given D/A change-over circuit with data, converts digital quantity to analog quantity by the D/A change-over circuit, the control voltage regulating module; Make the required voltage of calibration power that is added to heating resistor, compare with the detected power of measure portion.Compared with prior art, the beneficial effect of the utility model is: control automatically through chip microcontroller, simplified operation, improved automaticity, make that measurement is more accurate.The utility model can be used in the water load high power meter.
As the further improvement of the utility model, the output terminal of said voltage regulating module also links to each other with the input end of calibration voltage unit, and the output terminal of calibration voltage unit links to each other with the input end of A/D change-over circuit.The calibration voltage unit is delivered to the A/D change-over circuit and is converted digital quantity to after single-chip microcomputer is handled being added to the alternating voltage sampling on the heating resistor, guarantees that the voltage that is added on the heating resistor is normal voltage.
As the further improvement of the utility model, the input end of said A/D change-over circuit links to each other with the thermistor unit through amplifying circuit.The temperature of environment of can checking this thermistor realizes measuring compensating of power; The resistance of thermistor changes with variation of temperature; This resistance converts corresponding electric signal to amplify by amplifying circuit after; Convert digital quantity to through the A/D change-over circuit again, compensate measuring power by single-chip microcomputer.
As the further improvement of the utility model, said singlechip chip is STC89C58RD.Make that this single-chip microcomputer memory capacity is big, travelling speed is fast, antijamming capability is strong.
Description of drawings
Fig. 1 is the utility model principle of work block diagram.
Embodiment
As shown in Figure 11 a kind of digital water load high power meter Measurement and Control System; Comprise heating resistor unit, thermopile unit; The heating resistor unit links to each other with the output terminal of voltage regulating module, and the input end of voltage regulating module links to each other with the output terminal of single-chip microcomputer through the D/A change-over circuit, and the output terminal of voltage regulating module also links to each other with the input end of calibration voltage unit; The output terminal of calibration voltage unit links to each other with the input end of A/D change-over circuit; The thermopile unit links to each other with the input end of programmable amplifying circuit, and the output terminal of programmable amplifying circuit links to each other with the input end of single-chip microcomputer through the A/D change-over circuit, and the input end of A/D change-over circuit links to each other with the thermistor unit through amplifying circuit; Single-chip microcomputer also links to each other with man-machine interface, and the model of singlechip chip is STC89C58RD.
The power measurement part and the calibrated section that are provided with in the utility model play the function of measuring and calibrating respectively; The power measurement part is in the process that absorbs tested microwave power; The temperature difference of Inlet and outlet water makes thermopile produce electromotive force, and electromotive force converts digital quantity to through the A/D change-over circuit again after programmable amplifying circuit amplifies, deliver to single-chip microcomputer; After the computing of process single-chip microcomputer, the processing, demonstrate measured power by man-machine interface; In the calibrated section course of work, single-chip microcomputer is given D/A change-over circuit with data, converts digital quantity to analog quantity by the D/A change-over circuit; The control voltage regulating module makes the required voltage of calibration power that is added to heating resistor, compares with the detected power of measure portion; Adopt single-chip microcomputer to control automatically; Simplified operation, improved the automaticity of system, made that measurement is more accurate;
The utility model is not limited to the foregoing description; On the basis of the disclosed technical scheme of the utility model; Those skilled in the art is according to disclosed technology contents; Do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in the protection domain of the utility model.
Claims (4)
1. digital water load high power meter Measurement and Control System; Comprise heating resistor unit, thermopile unit, it is characterized in that said heating resistor unit links to each other with the output terminal of voltage regulating module; The input end of voltage regulating module links to each other with the output terminal of single-chip microcomputer through the D/A change-over circuit; The thermopile unit links to each other with the input end of programmable amplifying circuit, and the output terminal of programmable amplifying circuit links to each other with the input end of single-chip microcomputer through the A/D change-over circuit, and single-chip microcomputer also links to each other with man-machine interface.
2. a kind of digital water load high power meter Measurement and Control System according to claim 1; It is characterized in that; The output terminal of said voltage regulating module also links to each other with the input end of calibration voltage unit, and the output terminal of calibration voltage unit links to each other with the input end of A/D change-over circuit.
3. a kind of digital water load high power meter Measurement and Control System according to claim 1 and 2 is characterized in that the input end of said A/D change-over circuit links to each other with the thermistor unit through amplifying circuit.
4. a kind of digital water load high power meter Measurement and Control System according to claim 1 and 2 is characterized in that said singlechip chip is STC89C58RD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202616734U CN202256489U (en) | 2011-07-22 | 2011-07-22 | Digital measurement control system of water load heavy-power meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202616734U CN202256489U (en) | 2011-07-22 | 2011-07-22 | Digital measurement control system of water load heavy-power meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202256489U true CN202256489U (en) | 2012-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202616734U Expired - Fee Related CN202256489U (en) | 2011-07-22 | 2011-07-22 | Digital measurement control system of water load heavy-power meter |
Country Status (1)
| Country | Link |
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| CN (1) | CN202256489U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261008A (en) * | 2019-06-11 | 2019-09-20 | 北京无线电计量测试研究所 | A kind of water load calorimeter |
-
2011
- 2011-07-22 CN CN2011202616734U patent/CN202256489U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261008A (en) * | 2019-06-11 | 2019-09-20 | 北京无线电计量测试研究所 | A kind of water load calorimeter |
| CN110261008B (en) * | 2019-06-11 | 2021-12-14 | 北京无线电计量测试研究所 | Water load calorimeter |
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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 |
Granted publication date: 20120530 Termination date: 20150722 |
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| EXPY | Termination of patent right or utility model |