CN204990662U - Wireless transmission system with data screening function - Google Patents
Wireless transmission system with data screening function Download PDFInfo
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- CN204990662U CN204990662U CN201520537582.7U CN201520537582U CN204990662U CN 204990662 U CN204990662 U CN 204990662U CN 201520537582 U CN201520537582 U CN 201520537582U CN 204990662 U CN204990662 U CN 204990662U
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Abstract
The utility model relates to a wireless transmission system with data screening function, this transmission system of its characterized in that includes sensor, signal conditioning ware, microcontroller and WIFI wireless transmission module, sensor, signal conditioning ware, microcontroller and WIFI wireless transmission module connect gradually, and WIFI wireless transmission module and outside PC display terminal pass through wireless connection, microcontroller includes timer, adc, DSP treater and UART, timer, adc, DSP treater and UART connect gradually, UART is connected with WIFI wireless transmission module's input, adc's input and signal conditioning ware are connected.
Description
Technical field
The utility model belongs to Condition Monitoring Technology field, relates to a kind of wireless transmitting system with data screening function.
Background technology
At present, most of condition monitoring system adopts wire communication mode to carry out measuring-signal, but the on-the-spot running environment of some operating modes is severe.There is the problems such as basis of formation communications facility cost is high, difficult wiring, failure rate are high, maintenance is inconvenient in wire communication, therefore, adopts wireless transmission to replace wire transmission to be widely used in condition monitoring system.The Master's thesis " the running state of transformer monitoring system based on wireless sensor network " of such as Hebei University of Technology Zheng Shuan is exactly devise a set of wireless monitor system for running state of transformer.Wireless sensor node hardware composition in this system has representativeness, namely sensor is directly connected to wireless transport module by I/O interface.Although it takes full advantage of the advantage of radio communication, but, obvious deficiency in this design is, it does not consider in status monitoring process, and the original data volume of sensor collection is very huge, and the transfer rate of wireless module is very low usually, all data are all transmitted by wireless module, can greatly increase wireless transmission burden like this, very likely produce and lose several phenomenon, thus also can affect reliability and the real-time of data transmission.
Utility model content
In order to the problem that the data to be transmitted amount overcoming existing wireless transmitting system is large, transmission burden is heavy, the utility model provides a kind of wireless transmitting system with data screening function, this transmission system not only adopts wireless technology to overcome the problems such as wire communication cost is high, wiring is difficult, the raw data that can also spread out of sensor carries out Screening Treatment, significantly reduce the data volume of required transmission, again the validity feature data after screening are transmitted by wireless module, thus substantially reduce wireless transmission burden.
The purpose of this utility model is achieved through the following technical solutions:
A kind of wireless transmitting system with data screening function, it is characterized in that this transmission system comprises sensor, signal conditioner, microcontroller and WIFI wireless transport module, described sensor, signal conditioner, microcontroller is connected successively with WIFI wireless transport module, WIFI wireless transport module passes through wireless connections with outside PC display terminal, described microcontroller comprises timer, analog to digital converter, dsp processor and UART, described timer, analog to digital converter, dsp processor is connected successively with UART, the input end of described UART and WIFI wireless transport module connects, the input end of described analog to digital converter is connected with signal conditioner.
The above-mentioned wireless transmitting system with data screening function, described microcontroller adopts STM32F411RE development board.
The beneficial effects of the utility model are, the utility model is combined WIFI wireless transport module with the microcontroller with data processing function, namely sensor is first connected to microcontroller, connect WIFI wireless transport module again, so just a large amount of raw data that sensor collects can be carried out local data process, again the validity feature data after screening are transmitted by wireless module, thus substantially reduce wireless transmission burden.As in an embodiment, monitored tested lathe by sensor, it is 1024 that the original signal samples spread out of is counted, but the final analysis to signal is all carried out from its frequency domain angle usually, and spectrogram is symmetrical, so 512 frequency spectrum datas only need be transmitted.Pass through bandpass filtering treatment again, filter out low-frequency noise data and high frequency noise data that the installation due to measuring system causes, namely with the data that tested conditions of machine tool is irrelevant, then finally only need transmission 309 data, like this, about 70% is decreased than direct transmission original signal data amount by the data volume of required transmission after first carrying out data processing on a microcontroller, greatly alleviate the transmission burden of wireless module, the basis of accuracy ensureing data transmission substantially increases the transfer rate of data, effectively prevent the generation of losing several phenomenon, improve reliability and the real-time of data transmission.
Accompanying drawing explanation
Fig. 1 is the one-piece construction block diagram that the utility model has the wireless transmitting system of data screening function.
Fig. 2 is the structured flowchart that the utility model has the microcontroller 3 of the wireless transmitting system of data screening function.
Fig. 3 is the original signal spectrum figure of the utility model embodiment.
Fig. 4 is the spectrogram of original signal after bandpass filtering of the utility model embodiment.
Fig. 5 is the filtered envelope signal spectrogram of the utility model embodiment.
In figure, 1-sensor, 2-signal conditioner, 3-microcontroller, 4-WIFI wireless transport module, 5-PC display terminal, 31-timer, 32-analog to digital converter (AD converter), 33-DSP processor, 34-UART (universal asynchronous receiving-transmitting transmitter).
Embodiment
In order to make the art personnel understand the utility model, below in conjunction with embodiment and accompanying drawing thereof, the utility model is described in more detail.
The wireless transmitting system that the utility model has data screening function (is called for short transmission system, see Fig. 1) comprise sensor 1, signal conditioner 2, microcontroller 3 and WIFI wireless transport module 4, described sensor 1, signal conditioner 2, microcontroller 3 is connected successively with WIFI wireless transport module 4, WIFI wireless transport module 4 passes through wireless connections with outside PC display terminal, described microcontroller 3 (see Fig. 2) comprises timer 31, analog to digital converter (AD converter) 32, dsp processor 33 and UART (universal asynchronous receiving-transmitting transmitter) 34, described timer 31, analog to digital converter 32, dsp processor 33 is connected successively with UART34, the input end of described UART34 and WIFI wireless transport module 4 connects, the input end of described analog to digital converter 32 is connected with signal conditioner 2.
Sensor in the utility model can be placed in any detected part treating examining system as required, and sensor type also can carry out choosing and changing according to specific needs.Microcontroller 3 in the utility model can adopt polytype model, but ensure that used microcontroller 3 must comprise timer 31, analog to digital converter 32 and dsp processor 33, make that there is corresponding function, also can select microcontroller all functions be integrated in one, microcontroller all functions be integrated in one uses more convenient.
The utility model has the principle of work of the wireless transmitting system of data screening function and process is: sensor 1 is monitored the simulating signal obtained and spread out of to signal conditioner 2, after the amplification, filtering of signal conditioner 2, is transferred to microcontroller 3.Timer 31 trigger mode number converter 32 is utilized in microcontroller 3, by analog to digital converter 32, a large amount of original analog amount signals is converted into digital signal, this digital signal is stored in two buffer zones through the double buffer mode of DMA, the dsp processor 33 recycling this microcontroller carries out filtering and Envelope Demodulation Analysis, calculate the characteristic of raw data, then only characteristic is transferred to WIFI wireless transport module 4 by UART34, the last antenna wireless transmission of this WIFI wireless transport module that passes through again is to long-range PC display terminal, with the display of realization character data, analyze, the object of diagnosis.
Embodiment
The present embodiment adopts above-mentioned connected mode, wherein STM32F411RE development board selected by microcontroller 3, timer 31, analog to digital converter 32, dsp processor 33 and UART34 are integrated in one by this development board, and this STM32F411RE development board carries out whole data handling procedure.The device that the present embodiment will be monitored is lathe, and effective frequency range that this machine vibration is known is 1000-4000Hz.
The analog signals monitoring this machine vibration is transferred to signal conditioner 2 by sensor 1, and through the process such as amplification and filtering of signal conditioner 2, this analog signals is transmitted into microcontroller 3, namely in STM32F411RE development board.Analog to digital converter 32 in STM32F411RE development board is triggered with 10KHz frequency by timer 31, samples to analog signals, and the present embodiment is sampled 1024 data altogether, and simulating signal converts digital signal to the most at last.Original signal spectrum figure (as shown in Figure 3) is drawn out by these 1024 data, as can be seen from Figure 3, the spectral range of undressed raw data is very wide, comprises from 0Hz to 5000Hz, but usually, the signal of low-frequency range and high band belongs to useless noise signal.Such as, in this embodiment, the signal of 0Hz to 1000Hz scope is due to the non-equilibrium amplitude low-frequency noise signal caused, and 4000Hz to 5000Hz is the HF noise signal because measuring system causes.Then utilize DMA double buffer mode, digital signal is stored in buffering A or buffering B, then utilizes dsp processor 33 pairs of digital signals to carry out filtering and envelope demodulation, finally the result after process is exported to WIFI wireless transport module 4 by UART34.
Wherein the detailed process of filtering and envelope demodulation is: the digital signal stored in buffering A or buffering B first carries out bandpass filtering by dsp processor 33, the noise signal of filtering 0Hz to 1000Hz scope and the noise signal of 4000Hz to 5000Hz, obtain the spectrogram (as shown in Figure 4) of filtered signal.Can be seen by Fig. 4, the spectral range of signal after filtering after process only includes 1000Hz to 4000Hz, and the digital signal in this segment limit is counted and is only 309 through calculating.Then envelope signal is asked in dsp processor recycling Hilbert conversion, last frequency spectrum of being tried to achieve the envelope signal of digital signal by dsp processor 33 by fast Fourier algorithm, obtain final envelope signal spectrogram (as shown in Figure 5), be the signal graph that this lathe actual monitoring arrives.Therefore, the valid data of final actual needs transmission are only 309, like this, about 70% is decreased than transmission raw data 1024 data volumes, significantly reduce the data transmission pressure of wireless transmitting system, ensureing to transmit the speed that basis accurately improves data transmission simultaneously, be more suitable for commercial Application.
The utility model is not addressed part and is applicable to prior art.
Claims (2)
1. one kind has the wireless transmitting system of data screening function, it is characterized in that this transmission system comprises sensor, signal conditioner, microcontroller and WIFI wireless transport module, described sensor, signal conditioner, microcontroller is connected successively with WIFI wireless transport module, WIFI wireless transport module passes through wireless connections with outside PC display terminal, described microcontroller comprises timer, analog to digital converter, dsp processor and UART, described timer, analog to digital converter, dsp processor is connected successively with UART, the input end of described UART and WIFI wireless transport module connects, the input end of described analog to digital converter is connected with signal conditioner.
2. the wireless transmitting system with data screening function according to claim 1, is characterized in that described microcontroller adopts STM32F411RE development board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520537582.7U CN204990662U (en) | 2015-07-22 | 2015-07-22 | Wireless transmission system with data screening function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520537582.7U CN204990662U (en) | 2015-07-22 | 2015-07-22 | Wireless transmission system with data screening function |
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| CN204990662U true CN204990662U (en) | 2016-01-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523928B (en) * | 2016-11-24 | 2018-08-03 | 东北大学 | Pipeline leakage detection method based on the screening of sound wave real time data two level |
| CN108489540A (en) * | 2018-03-15 | 2018-09-04 | 上海士翌测试技术有限公司 | Intelligent Sensing System based on wifi communications |
| CN110896567A (en) * | 2018-09-12 | 2020-03-20 | 广州优视网络科技有限公司 | Data transmission method and device based on WIFI |
-
2015
- 2015-07-22 CN CN201520537582.7U patent/CN204990662U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523928B (en) * | 2016-11-24 | 2018-08-03 | 东北大学 | Pipeline leakage detection method based on the screening of sound wave real time data two level |
| CN108489540A (en) * | 2018-03-15 | 2018-09-04 | 上海士翌测试技术有限公司 | Intelligent Sensing System based on wifi communications |
| CN110896567A (en) * | 2018-09-12 | 2020-03-20 | 广州优视网络科技有限公司 | Data transmission method and device based on WIFI |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20160120 Termination date: 20170722 |
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| CF01 | Termination of patent right due to non-payment of annual fee |