CN104101776A - Wireless single-chip microcomputer-based current detection device and detection method - Google Patents
Wireless single-chip microcomputer-based current detection device and detection method Download PDFInfo
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- CN104101776A CN104101776A CN201410305118.5A CN201410305118A CN104101776A CN 104101776 A CN104101776 A CN 104101776A CN 201410305118 A CN201410305118 A CN 201410305118A CN 104101776 A CN104101776 A CN 104101776A
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- 238000001514 detection method Methods 0.000 title claims abstract description 24
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Abstract
The invention provides a wireless single-chip microcomputer-based current detection device and detection method. According to the wireless single-chip microcomputer-based current detection device and detection method, sensor nodes are arranged at places where equipment or component current requires to be detected, and acquired current data are monitored and controlled in an unified and real-time manner through a monitoring center, and therefore, defects such as being non-real-time, missed detection and false detection of a traditional current detection method can be eliminated. According to each wireless sensor node, a low-power consumption wireless single-chip microcomputer chip is adopted as the core, and a closed-loop type Hall current sensor is utilized, and computer technology and wireless network technology are combined, and therefore, real-time data collection, A/D conversion, analysis, storage and wireless communication can be performed on the current, and thus, low cost, low power consumption and high detection accuracy can be realized, and work efficiency can be improved, and the safety of equipment manufacture and operation can be ensured, and the wireless single-chip microcomputer-based current detection device can have a bright application and development prospect.
Description
Technical field
The present invention relates to current detection technology field, relate in particular to a kind of current sensing means and detection method based on wireless singlechip.
Background technology
Nowadays in the production and use procedure of various electronic equipments or element, the current change quantity that element carries has become the important parameter of decision element performance.Conventional current detection method mainly relies on reometer meter, utilize artificial hand behaviour mode to carry out gathering intermittence, have the shortcomings such as non real-time, undetected, flase drop, especially some special operation conditions are unfavorable for on-the-spot manual measurement, so can not adapt to the needs of current production technology development.
Application number is that 201310474597.9 patent relates to a kind of abnormal excess current on-line measuring device for distribution system, comprise current signal Acquisition Circuit, integrated electric parameter detecting element circuit, microcontroller system circuit, the current transformer two ends of each phase connect current signal output end by a pull-up resistor respectively, separately there are two pull-up resistors in parallel with current transformer, two shaping capacitance are in parallel between current signal output end, draw reference voltage signal from the connected node of two pull-up resistors, draw ground signalling from the connected node of two shaping capacitance, the corresponding integrated electric parameter detecting element circuit that connects, three-phase current signal output accesses respectively the input end of integrated electrical parameters detection element circuit, the output terminal of described integrated electric parameter detecting element circuit connects microcontroller system circuit, but this invention limitation is larger, be only applicable to become distribution occasion, so need a kind of scope of application wider, cost is low, the current sensing means that precision is high and method.
Summary of the invention
The object of this invention is to provide a kind of current sensing means based on wireless singlechip, its principle based on sensor collection and wireless singlechip control transmission, can realize low cost, low-power consumption and higher accuracy of detection, increase work efficiency, ensure the security of device fabrication and operation.
Another object of the present invention is to provide a kind of electric current detecting method based on wireless singlechip.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions: a kind of current sensing means based on wireless singlechip, comprise data transmission unit and multiple convergence receiving node, data transmission unit is by the next single-chip microcomputer and consist of the connected current sensor of interface circuit, data-carrier store with it, and convergence receiving node is made up of upper single-chip microcomputer and the level shifting circuit that is attached thereto.
Described upper single-chip microcomputer and the next single-chip microcomputer are the singlechip chip with radio transmission-receiving function.
Described current sensor is closed loop Hall current sensor.
Described data-carrier store is electric erazable programmable storer.
Described interface circuit comprises bidirectional linked list bus.
Described level shifting circuit comprises standard serial interface chip.
Based on an electric current detecting method for wireless singlechip, comprise the steps:
1) determine current measurement point, and settle data transmission unit, i.e. wireless sensing node at each current measurement point place;
2) current data is carried out to Real-time Collection and storage, and processing is converted to digital signal to be sent;
3) set up the wireless interconnected and data transmission between data transmission unit and receiving element;
4) the upper convergence node in receiving element is interconnected by serial communication interface with control computing machine, realize detection and processing to current data.
Compared with prior art, advantage of the present invention is: taking low-consumption wireless single-chip microcomputer as core, utilize Hall current sensor, fusion calculation machine technology and Radio Transmission Technology, electric current is carried out to real-time data acquisition, A/D conversion, analyzing stored and radio communication, can realize low cost, low-power consumption and high measurement accuracy, improved work efficiency, ensure the security of device fabrication and operation, there is good application and development prospect.
Brief description of the drawings
Fig. 1 is that the present invention forms structural drawing;
Fig. 2 is wireless receiving and dispatching process flow diagram of the present invention.
Embodiment
As shown in Figure 1, a kind of current sensing means and detection method based on wireless singlechip, device comprises data transmission unit 1 and multiple convergence receiving node 2, data transmission unit 1 is by the next single-chip microcomputer 3 and consist of the connected current sensor 4 of interface circuit, data-carrier store 5 with it, convergence receiving node 2 is made up of upper single-chip microcomputer 6 and the level shifting circuit 7 that is attached thereto, and detection method comprises the steps:
1) determine current measurement point, and settle data transmission unit, i.e. wireless sensing node at each current measurement point place;
Data transmission unit is made up of the next single-chip microcomputer, current sensor, data-carrier store and interface circuit, single-chip microcomputer is the singlechip chip with radio transmission-receiving function, current sensor is closed loop Hall current sensor, data-carrier store is electric erazable programmable storer, and interface circuit is connected by bidirectional linked list bus.
Current sensor in transmitting element adopts serial two line interfaces, gathers current information and is stored in data-carrier store, and data-carrier store is connected with the next controller general I/O pin by bi-directional serial interface bus, realizes data interconnection.
Convergence node in receiving element is made up of upper single-chip microcomputer and level shifting circuit, by the setting to general I/O pins of MCU, realize RXD, the TXD function of UART, will receive and dispatch pin and be connected and realize level match with level transferring chip, for the communicating by letter of host computer.
2) current data is carried out to Real-time Collection and storage, and processing is converted to digital signal to be sent;
Sensor unit is mainly responsible for the collection of current information, current signal is converted to voltage signal by it, the voltage signal that gathers enters single-chip microcomputer by storer, through built-in linear A/D converter, by the software control sampling time, carry out start/stop pattern and carry out data-switching, obtain digital signal to be sent.
3) set up the wireless interconnected and data transmission between data transmission unit and receiving element;
Due to selected single-chip microcomputer built-in high-frequency wireless transceiver, so arrange by single-chip microcomputer, can realize the functions such as transmission, reception and monitoring between upper and lower wireless singlechip, the data of single-chip microcomputer send and accept all to adopt data packet form, when wireless transmission, except transport address code and valid data, also carry out the detection of lead code and effect code CRC, concrete wireless receiving and dispatching flow process is shown in Fig. 2.
4) the upper convergence node in receiving element is interconnected by serial communication interface with control computing machine, realize detection and processing to current data.
The data that upper aggregation node sends sensor node converge and store, and wait for the order of computing machine, be ready to communicating by letter between computing machine, after data are transferred to computing machine by RS232 serial communication, by with the comparing of Computer Database, analytical sampling current status, draws test result, makes corresponding control operation by computing machine.
The present invention is taking low-consumption wireless single-chip microcomputer as core, utilize Hall current sensor, fusion calculation machine technology and Radio Transmission Technology, electric current is carried out to real-time data acquisition, A/D conversion, analyzing stored and radio communication, can realize low cost, low-power consumption and higher accuracy of detection, improve work efficiency, ensured the security of device fabrication and operation, there is good application and development prospect.
Below by specific embodiment, apparatus and method are described, for example utilize the electroplating current of measuring pcb board electroplating device based on the current sensing means of wireless singlechip, upper and lower single-chip microcomputer in current sensing means adopts NRF9E5 series wireless singlechip, current sensor is TBC-LTA series Hall current sensor, data-carrier store is eeprom memory 24C256, interface circuit is connected by iic bus, and level conversion is completed by MAX232 standard serial interface chip.
First by data transmission unit, it is wireless sensing node, be placed in the measurement point of electroplating current, TBC-LTA series sensor adopts serial two line interfaces, gather current information and be stored in data-carrier store EEPROM, data-carrier store is connected with general purpose I/O pin of the next single-chip microcomputer NRF9E5 by IIC interface bus, realizes data interconnection.
NRF9E5 built-in linear A/D converter, can, by the software control sampling time, carry out start/stop pattern, obtains digital signal to be sent after data-switching.NRF9E5 wireless singlechip the is built-in 433MHz of NRF905,868MHz, 915MHz transceiver, make can complete the functions such as wireless transmission, reception and monitoring between single-chip microcomputer, finally the current data of each node is transferred to computing machine by RS232 serial communication, analytical sampling current status.
In utilizing this device to carry out current detecting transmission, the outside of computing machine can also connect some warnings or opertaing device.At computing machine, the sample rate current of this device is analyzed, and draw after test result, reach critical alarming value if detect electric current, just to outside panalarm output alarm signal, and control outside actuating equipment electric current is finely tuned, until alarm condition disappearance, thereby complete feedback control procedure.
The foregoing is only specific embodiments of the invention, but technical characterictic of the present invention is not limited to this, any those skilled in the art is in the field of the invention, and the variation of doing or modification are all encompassed among the scope of the claims of the present invention.
Claims (7)
1. the current sensing means based on wireless singlechip, it is characterized in that: comprise data transmission unit and multiple convergence receiving node, data transmission unit is by the next single-chip microcomputer and consist of the connected current sensor of interface circuit, data-carrier store with it, and convergence receiving node is made up of upper single-chip microcomputer and the level shifting circuit that is attached thereto.
2. a kind of current sensing means based on wireless singlechip as claimed in claim 1, is characterized in that: described upper single-chip microcomputer and the next single-chip microcomputer are the singlechip chip with radio transmission-receiving function.
3. a kind of current sensing means based on wireless singlechip as claimed in claim 1, is characterized in that: described current sensor is closed loop Hall current sensor.
4. a kind of current sensing means based on wireless singlechip as claimed in claim 1, is characterized in that: described data-carrier store is electric erazable programmable storer.
5. a kind of current sensing means based on wireless singlechip as claimed in claim 1, is characterized in that: described interface circuit comprises bidirectional linked list bus.
6. a kind of current sensing means based on wireless singlechip as claimed in claim 1, is characterized in that: described level shifting circuit comprises standard serial interface chip.
7. adopt the electric current detecting method based on wireless singlechip current sensing means described in claim 1, comprise the steps:
1) determine current measurement point, and settle data transmission unit, i.e. wireless sensing node at each current measurement point place;
2) current data is carried out to Real-time Collection and storage, and processing is converted to digital signal to be sent;
3) set up the wireless interconnected and data transmission between data transmission unit and receiving element;
4) the upper convergence node in receiving element is interconnected by serial communication interface with control computing machine, realize detection and processing to current data.
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| CN201410305118.5A CN104101776A (en) | 2014-06-30 | 2014-06-30 | Wireless single-chip microcomputer-based current detection device and detection method |
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| CN201410305118.5A CN104101776A (en) | 2014-06-30 | 2014-06-30 | Wireless single-chip microcomputer-based current detection device and detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062489A (en) * | 2014-07-11 | 2014-09-24 | 国网河南省电力公司漯河供电公司 | Current detection device and detection method based on wireless single-chip microcomputer |
| CN110890052A (en) * | 2019-11-29 | 2020-03-17 | Tcl华星光电技术有限公司 | Driving circuit, driving method and display device |
-
2014
- 2014-06-30 CN CN201410305118.5A patent/CN104101776A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062489A (en) * | 2014-07-11 | 2014-09-24 | 国网河南省电力公司漯河供电公司 | Current detection device and detection method based on wireless single-chip microcomputer |
| CN110890052A (en) * | 2019-11-29 | 2020-03-17 | Tcl华星光电技术有限公司 | Driving circuit, driving method and display device |
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