CN203551639U - Wireless sensing device for measuring circuit load current and temperature simultaneously - Google Patents
Wireless sensing device for measuring circuit load current and temperature simultaneously Download PDFInfo
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- CN203551639U CN203551639U CN201320674091.8U CN201320674091U CN203551639U CN 203551639 U CN203551639 U CN 203551639U CN 201320674091 U CN201320674091 U CN 201320674091U CN 203551639 U CN203551639 U CN 203551639U
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- load current
- sensing device
- measuring circuit
- temperature
- wireless sensing
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- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000001931 thermography Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000009529 body temperature measurement Methods 0.000 abstract 1
- 230000005684 electric field Effects 0.000 abstract 1
- 230000008859 change Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model relates to a sensor and particularly relates to a wireless sensing device for measuring circuit load current and temperature simultaneously. The device comprises a temperature sensor (6) and a current sensor (7) respectively connected on a single chip microcomputer (5); the single chip microcomputer (5) is connected with a data processor (3); the data processor (3) is connected with a wireless communication module (4); and a power supply module (2) provides power for the all above components. The wireless sensing device for measuring circuit load current and temperature simultaneously has the advantages that the size is small, the power consumption is low, and the load current and equipment operation temperature in the power transmission line can be monitored simultaneously, and the device can be applied to load current and temperature measurement in power and related large-load electrical fields.
Description
Technical field
The utility model relates to a kind of sensing device, relates in particular to the wireless sensing device of a kind of measuring circuit load current simultaneously and temperature.
Background technology
Sensor is as the front end unit of information acquisition system, acts on more and more importantly, and as a structure composition in on-line monitoring system, the importance of sensor becomes more and more obvious.
In actual monitored environment, only have on duty and dispatcher to know the actual current of whole piece circuit, the actual current of each node cannot embody.In Operation of Electric Systems, the load of circuit is all changing at any time,
Within one day, there is peak and low valley, in 1 year, have the difference in season, all change every year, development year by year, during power system accident, the load of circuit is ever-changing especially.No matter after what reason causes that line current increases, the temperature of wire all will rise.At the initial stage that particularly line current increases, line temperature is not also arriving before equilibrium state in transfer of air process towards periphery, and the rising of line temperature will reach maximal value.
In Operation of Electric Systems environment, the sensor of multiple single parameters can not be installed among a small circle, single parametrical sense device can not meet the application of on-line monitoring and management completely simultaneously.
Summary of the invention
Technical problem to be solved in the utility model is for the deficiency in above-mentioned technology, the power transmission lines wireless sensing device of a kind of while measuring circuit temperature, two variablees of load current is provided, it is laid conveniently, intelligent degree is high, cost is low, power consumption is little, reliable working performance, can guarantee the needs of the management of system power load and the monitoring of equipment running temperature.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
The wireless sensing device of measuring circuit load current and temperature simultaneously, including temperature sensor and current sensor is connected on single-chip microcomputer, single-chip microcomputer connection data processor, data processor is connected with UHF transceiver, and is respectively the power supply unit of above-mentioned all element power supplies.
Described current sensor adopts silicon steel sheet stack to add making, and outside coiling multiturn insulated conductor, forms a not sealing current sensor.
Described single-chip microcomputer adopts ATMEL89C51 single-chip microcomputer.
Described power supply unit adopts LM317 power IC.
Described UHF transceiver (6) is CC1100, and frequency of operation is adjustable at 400MHz～464MHz.
Described temperature sensor (4) adopts PT100 contact thermography sensor.
Advantage and beneficial effect: it is little, low in energy consumption to the utlity model has volume, can monitor the load current of power transmission lines and the feature of equipment running temperature simultaneously.Can provide temperature beyond limit and temperature jump to report to the police, also have current break to report to the police and off-limit alarm, be applicable to electric power and the relevant large load load current of electrical domain and the measurement of temperature simultaneously.
Accompanying drawing explanation
Fig. 1 is circuit structure theory diagram of the present utility model;
In figure:
1-power supply unit; 2-single-chip microcomputer; 3-data processor;
4-temperature sensor; 5-current sensor; 6-UHF transceiver.
Embodiment
As shown in Figure 1, the utility model comprises that the output of temperature sensor 4 and current sensor 5, input end are connected with input, the output terminal of single-chip microcomputer 2 respectively, output terminal connection data processor 3 input ends of single-chip microcomputer 2, the output of data processor 3, input, the output terminal that input end connects respectively UHF transceiver 6, and be respectively temperature sensor 4, current sensor 5, single-chip microcomputer 2, data processor 3 and UHF transceiver 6 power supply unit 1 of energy is provided.
Basic comprising:
The design adopts ATMEL89C51 single-chip microcomputer+CC1100 wireless data sending chip to form
Communication means:
The built-in 4Kflash of ATMEL89C51 single-chip microcomputer, low-voltage, high-performance CMOS 8-bit microprocessor, wherein built-in flash can wipe more than 1000 times repeatedly.Internal RAM 128 bytes, enough this application are used.
This device adopts ATMEL high density nonvolatile memory manufacturing technology to manufacture, compatible mutually with MCS-51 instruction set and the output pin of industrial standard.32 programmable Is/O line, two 16 bit timing device/counters, 5 interrupt sources (comprising timer interruption and IO interrupts), serial-port able to programme (being applied to production debugging), also has leaving unused and power-down mode of low-power consumption.
CC1100 is the UHF transceiver of the real monolithic of a kind of low cost, for low-consumption wireless application designs.Main circuit will be set as 315,433,868 and the ISM(industry of 915MHz, science and medical science) frequency band, also can easily be set to other frequencies of 300-348 MHz, 400-464 MHz and 800-928 MHz, this application adopts 433MHZ.CC1100 provides hardware supported widely for processing data packets, data buffering, burst transfers of data, clear channel estimating, quality of connection indication and electromagnetic wave excites.The main operating parameters of CC1100 and 64 transmission/reception FIFO(FIFO stacks) can pass through the control of SPI interface.
Single-chip microcomputer adopts the virtual SPI communication port of the two-way IO mouth of P1, be connected with the SPI interface of CC1100, communication speed is as the criterion with single-chip microcomputer square crystal frequency, because both sides' level has larger gap (single-chip microcomputer 5V, CC1100 3V), so adopt the two-way isolating chip of 74LVC4245 dual power supply to carry out level therebetween, automatically change.
Power unit:
The design uses LM317 as working power module, its wide voltage input, for the design, application has larger help in high-efficiency power output, simultaneously because LM317 belongs to linear regulation module, substantially can not produce power supply ripple, clutter inhibition for rear class signal input part is fine, and supply voltage is adjusted to 5V and 3V.
Measurement function:
This product comprises temperature survey, current measurement two aspects:
Temperature survey: adopt PT100 contact thermography sensor, its principle is that platinum resistance varies with temperature, resistance value produces regular variation, circuit provides 2.5V power supply benchmark, by platinum resistance and reference resistance intrinsic standoff ratio, sample temperature variation, but its changing value is very little, must carry out certain proportion amplification through differential amplifier circuit and just can output to late-class circuit, so use LM324 operational amplifier here, single supply 5V power supply, there are 4 grades of amplifiers inside, in design, use wherein 2 formation secondary amplifier unit to amplify respectively 2 times and 3 times, millivolt level signal is enlarged into volt level signal the most at last.
Current measurement: adopt silicon steel sheet stack to add making, outside coiling multiturn insulated conductor, forms a not sealing current sensor, when external communication electric current changes, current output sensor also changes, and according to the variation of its output current, is converted into the variation of voltage by reference resistance.Because its change in voltage is very little, need to adopt remaining 2 amplifiers of LM324 to carry out secondary amplification equally, amplify respectively 3 times and 5 times, the voltage signal collecting is adjusted into rear end AD sampling module acceptable 0-3V signal.
AD sampling A/D chip, adopts AD0809, and AD0809 is 8 successive approximation A/D converters.Conversion accuracy and slewing rate are all practical in this application.
In actual applications, single-chip microcomputer 5 receives the sampled data of temperature sensor 6 and current sensor 7 according to program timing, simultaneously according to the predefined off-limit alarm numerical value of program and sudden change increment warning numerical value, warning message is provided, one-chip computer module 5 is passed to data processor 3 by data, sends to the radio receiver of upper level through wireless communication module 4.
The above; it is only better case study on implementation of the present utility model; not the utility model is imposed any restrictions, every any simple modification of above-mentioned case study on implementation being done according to the utility model technical spirit, change and equivalent structure change, and all still belong in protection domain of the present utility model.
Claims (6)
1. the wireless sensing device of while measuring circuit load current and temperature, it is characterized in that: include temperature sensor (4) and be connected on single-chip microcomputer (2) with current sensor (5), single-chip microcomputer (2) connection data processor (3), data processor (3) is connected with UHF transceiver (6), and is respectively the power supply unit (1) of above-mentioned all element power supplies.
2. the wireless sensing device of measuring circuit load current and temperature simultaneously according to claim 1, is characterized in that described current sensor (5) adopts silicon steel sheet stack to add making, and outside coiling multiturn insulated conductor, forms a not sealing current sensor.
3. the wireless sensing device of measuring circuit load current and temperature simultaneously according to claim 1, is characterized in that described single-chip microcomputer (2) adopts ATMEL89C51 single-chip microcomputer.
4. the wireless sensing device of measuring circuit load current and temperature simultaneously according to claim 1, is characterized in that described power supply unit (1) adopts LM317 power IC.
5. the wireless sensing device of measuring circuit load current and temperature simultaneously according to claim 1, is characterized in that described UHF transceiver (6) is CC1100, and frequency of operation is adjustable at 400MHz～464MHz.
6. the wireless sensing device of measuring circuit load current and temperature simultaneously according to claim 1, is characterized in that described temperature sensor (4) adopts PT100 contact thermography sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320674091.8U CN203551639U (en) | 2013-10-30 | 2013-10-30 | Wireless sensing device for measuring circuit load current and temperature simultaneously |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320674091.8U CN203551639U (en) | 2013-10-30 | 2013-10-30 | Wireless sensing device for measuring circuit load current and temperature simultaneously |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203551639U true CN203551639U (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320674091.8U Expired - Lifetime CN203551639U (en) | 2013-10-30 | 2013-10-30 | Wireless sensing device for measuring circuit load current and temperature simultaneously |
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| CN (1) | CN203551639U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113465683A (en) * | 2021-07-28 | 2021-10-01 | 郑州信工智能化系统有限公司 | Composite sensor for measuring current and temperature |
-
2013
- 2013-10-30 CN CN201320674091.8U patent/CN203551639U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113465683A (en) * | 2021-07-28 | 2021-10-01 | 郑州信工智能化系统有限公司 | Composite sensor for measuring current and temperature |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |