CN101493362A - Digital temperature polling instrument for power supply-distribution system - Google Patents
Digital temperature polling instrument for power supply-distribution system Download PDFInfo
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- CN101493362A CN101493362A CNA2008100330190A CN200810033019A CN101493362A CN 101493362 A CN101493362 A CN 101493362A CN A2008100330190 A CNA2008100330190 A CN A2008100330190A CN 200810033019 A CN200810033019 A CN 200810033019A CN 101493362 A CN101493362 A CN 101493362A
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- control device
- power supply
- electronic switch
- temperature
- digital temperature
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- 238000006243 chemical reaction Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 230000036413 temperature sense Effects 0.000 description 1
Abstract
The invention provides a digital temperature logger used in a power supply system. The logger is used for monitoring and controlling temperature of devices such as transformers, electric terminals and the like in an electric power supply and distribution system, has the advantages of simple structure and convenient operation, and comprises a control device, an A/D converter, a power supply unit and a connecting terminal, one side of the connecting terminal is connected with a temperature sensor by a lead resistor, and the other side of the connecting terminal is respectively connected with the A/D converter and the power supply unit by an electronic switch, the other terminal of the A/D converter is connected with the control device to transmit signals detected from the temperature sensor to the control device after being converted by the A/D converter; a calibration module and a user module in the control device control the work of the temperature logger by setting the temperature sensor to sense temperature of each channel connected with terminals of the logger, thus realizing the purposes of the invention.
Description
Technical field
The present invention relates to a kind of logging, particularly a kind of being used for for occasions such as distribution, measuring transformer oil temperature, electric terminal temperature etc. have warning, the electric power system digital temperature polling instrument of communication bus interface.
Background technology
In the existing power power supply-distribution system, temperature parameter is one of most important non-electrical parameter, temperature monitoring and control for equipment such as the transformer in the power supply and distribution of electric power system, electric terminals, determined whole power supply and distribution of electric power system normally to move, and, be the inexorable trend of Automation of Electric Systems for the Intelligent Measurement and the control of the multi-point temp of electrical equipment.
Therefore, need a kind of temperature patrol inspection device especially,, satisfy the needs in market, remedy the deficiency of existing equipment the temperature monitoring and the control of equipment such as the transformer in the power supply and distribution of electric power system, electric terminal.
Summary of the invention
The object of the present invention is to provide a kind of electric power system digital temperature polling instrument, to the temperature monitoring and the control of equipment such as the transformer in the power supply and distribution of electric power system, electric terminal, simple in structure, easy to operate.
Technical matters solved by the invention can realize by the following technical solutions:
A kind of electric power system digital temperature polling instrument, it is characterized in that, it comprises control device, A/D conversion equipment, supply unit and connection terminal, side at described connection terminal is connected with temperature sensor by lead resistance, the opposite side of described connection terminal connects A/D conversion equipment and supply unit respectively by electronic switch, another termination control device of described A/D conversion equipment will be transferred to described control device by detected signal after the conversion of A/D conversion equipment from temperature sensor.
Described electronic switch comprises that eight passages select one electronic switch and two four-ways to select one electronic switch.
Described control device comprises accuracy test and the calibration that is used for before the product export, to the open calibration module of user and open to all users, is used to set the line module of various work and alarm parameters.
Electric power system of the present invention has following characteristics with digital temperature polling instrument:
Lead-in wire error when 1, eliminating the thermal resistance access;
2, passage switching, data acquisition are conveniently fast;
3, the pressure drop on the electronic switch conducting resistance is got rid of outside A/D gathers, at utmost promoted the temperature characterisitic of hardware;
4, control device adopts calibration module and line module control, but the equal setting code of calibration module and line module, to improve security.
Electric power system digital temperature polling instrument of the present invention, by being set, temperature sensor senses is connected the temperature in each passage on the described instrument terminal, work by calibration module in the described control device and line module control temperature polling instrument realizes purpose of the present invention.
Description of drawings
Fig. 1 is the structural representation of electric power system of the present invention with digital temperature polling instrument;
Fig. 2 is the FB(flow block) of calibration module of the present invention;
Fig. 3 is the FB(flow block) of line module of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Embodiment
As shown in Figure 1, a kind of electric power system digital temperature polling instrument, it comprises control device 1, A/D conversion equipment 2, supply unit 3 and connection terminal 4.
In the left side of connection terminal 4 by the contact feet c of connection terminal 4, d, e is connected respectively to a of temperature sensor RTD by conductor resistance r1, the b end, the right side of connection terminal 4 connects eight passages respectively by the contact feet e of connection terminal 4 and selects one electronic switch K2, K3, the right side of connection terminal 4 connects eight passages by the contact feet d of connection terminal 4 and selects one electronic switch K1, electronic switch K1, the other end of K2 connects two four-ways respectively and selects 1 of one electronic switch K4,2 pin, 3 pin of electronic switch K4 connect the positive pole of A/D conversion equipment 2, the right side of connection terminal 4 connects the negative pole of A/D conversion equipment 2 and the positive pole of supply unit 3 respectively by the contact feet c of connection terminal 4, the negative pole of supply unit 3 connects the other end of electronic switch K3, the output terminal of A/D conversion equipment 2 connects the I/O port of control device 1, electronic switch K1, K2, K3 is provided with conducting resistance r2, and electronic switch K4 is provided with conducting resistance r3.
Control device 1 comprises calibration module and line module.
As shown in Figure 2, described calibration module comprises main program module, time-delay counting module, timer counter module and reception, sending module; Main program module comprises that beginning, calibration, System self-test, initialization, fault, tasks interrupt, button, zone bit processing, channel data collection, temperature value calculate and the warning treatment step, when needs are calibrated, and calibration process; When breaking down, the system failure is reported to the police; When button was arranged, button was handled.
The time-delay counting module comprises the clear flag position, delay time counting processing, display update and interruption are returned.
The timer counter module comprises that clear flag position, timer counter, demonstration switching, hand-off process and interruption return.
Reception or sending module comprise that clear flag position, reception or transmission, reception are handled, transmission is handled and interruption is returned.
As shown in Figure 3, the process flow diagram of line module is as follows.
During use, contact feet c, d, the e of connection terminal 4 carry out temperature sense to each passage respectively by temperature sensor RTD, conductor resistance when wherein three r1 are the three-wire system access, there is fixing corresponding relation between the resistance value of temperature sensor RTD and the temperature value of itself, as long as record the resistance value of temperature sensor RTD, can obtain temperature value by the data of searching.By Ohm law
Wherein I is the output current of supply unit 3, and supply unit 3 is constant current source Is in the present embodiment, as long as record the Uab among the figure, and can be by calculating the temperature value that obtains each passage.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements all fall in the claimed scope of the invention, and the claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (3)
1, a kind of electric power system digital temperature polling instrument, it is characterized in that, it comprises control device, A/D conversion equipment, supply unit and connection terminal, side at described connection terminal is connected with temperature sensor by lead resistance, the opposite side of described connection terminal connects A/D conversion equipment and supply unit respectively by electronic switch, another termination control device of described A/D conversion equipment will be transferred to described control device by detected signal after the conversion of A/D conversion equipment from temperature sensor.
2, electric power system digital temperature polling instrument as claimed in claim 1 is characterized in that: described electronic switch comprises that eight passages select one electronic switch and two four-ways to select one electronic switch.
3, electric power system digital temperature polling instrument as claimed in claim 1, it is characterized in that: described control device comprises accuracy test and the calibration that is used for before the product export, do not open, be used to set the line module of various work and alarm parameters to the calibration module of user's opening with to all users.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100330190A CN101493362A (en) | 2008-01-24 | 2008-01-24 | Digital temperature polling instrument for power supply-distribution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100330190A CN101493362A (en) | 2008-01-24 | 2008-01-24 | Digital temperature polling instrument for power supply-distribution system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101493362A true CN101493362A (en) | 2009-07-29 |
Family
ID=40924068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100330190A Pending CN101493362A (en) | 2008-01-24 | 2008-01-24 | Digital temperature polling instrument for power supply-distribution system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101493362A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384796A (en) * | 2011-09-28 | 2012-03-21 | 商洛供电局 | Multi-resistor remote temperature measuring device for transformer |
| CN106092362A (en) * | 2016-08-26 | 2016-11-09 | 江苏远望仪器有限公司 | Three-wire type platinum resistance thermometer sensor, PT100 system for detecting temperature |
| CN106205752A (en) * | 2016-07-27 | 2016-12-07 | 中广核工程有限公司 | Major loop device temperature monitoring system and method between NSSS cold conditions function test |
-
2008
- 2008-01-24 CN CNA2008100330190A patent/CN101493362A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384796A (en) * | 2011-09-28 | 2012-03-21 | 商洛供电局 | Multi-resistor remote temperature measuring device for transformer |
| CN106205752A (en) * | 2016-07-27 | 2016-12-07 | 中广核工程有限公司 | Major loop device temperature monitoring system and method between NSSS cold conditions function test |
| CN106205752B (en) * | 2016-07-27 | 2019-05-17 | 中广核工程有限公司 | Major loop device temperature monitors system and method between NSSS cold conditions function test |
| CN106092362A (en) * | 2016-08-26 | 2016-11-09 | 江苏远望仪器有限公司 | Three-wire type platinum resistance thermometer sensor, PT100 system for detecting temperature |
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Open date: 20090729 |