CN201465279U - Battery-powered wireless multi-channel vibration data synchronous acquisition system - Google Patents
Battery-powered wireless multi-channel vibration data synchronous acquisition system Download PDFInfo
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- CN201465279U CN201465279U CN 200920081493 CN200920081493U CN201465279U CN 201465279 U CN201465279 U CN 201465279U CN 200920081493 CN200920081493 CN 200920081493 CN 200920081493 U CN200920081493 U CN 200920081493U CN 201465279 U CN201465279 U CN 201465279U
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Abstract
本实用新型公开了一种电池供电的无线多通道振动数据同步采集系统，涉及振动测试和无线数据传输技术领域，系统采用一主多从分布式系统结构，包括数据采集发射模块和数据接收处理模块。数据采集发射模块和数据接收处理模块之间经无线方式通讯，由于采用无线传输方式，解决了有线传输方式布线繁琐，安装维护不方便等缺点，同时不必受被测位置地理环境，气候条件等影响，满足野外振动试验的要求；系统采用低功耗的设计，由电池供电，满足功耗要求，可以长时间稳定工作。各个采集发射模块相互独立，通过改变不同的配置参数可以配种多种传感器，结构简单，组合方便，通用性强。
The utility model discloses a battery-powered wireless multi-channel vibration data synchronous acquisition system, which relates to the technical field of vibration testing and wireless data transmission. The system adopts a multi-slave distributed system structure including a data acquisition and transmission module and a data receiving and processing module. . The data acquisition and transmission module communicates with the data receiving and processing module through wireless communication. Due to the use of wireless transmission, it solves the shortcomings of wired transmission, such as cumbersome wiring, inconvenient installation and maintenance, and at the same time, it does not need to be affected by the geographical environment and climate conditions of the measured location. , to meet the requirements of the field vibration test; the system adopts a low-power design, powered by batteries, meets the power consumption requirements, and can work stably for a long time. Each collection and transmission module is independent of each other, and various sensors can be equipped by changing different configuration parameters. The structure is simple, the combination is convenient, and the versatility is strong.
Description
Technical field
The utility model relates to vibration-testing and wireless data transmission technology field, exactly relates to a kind of employing powered battery, and based on USB2.0 and host communication, but the synchronous acquisition system of remote live wireless telemetering vibration signal.
Background technology
Vibration is a kind of dynamic physical phenomenon that extensively is present in nature and human society life, is the to-and-fro movement on our the observed a certain equilibrium position.Under many situations, the mechanical vibration meeting works the mischief, and it influences the function of precision instrument equipment, the precision and the surface quality of reduction processing parts, has also aggravated the fatigure failure and the wearing and tearing of member, causes member to damage and causes the accident.On engineering, vibration survey can be determined the data such as acceleration, speed and displacement vibrated, for engineering design, fault detect and prevention provide foundation.In the vibration survey of practical structure part, need to measure a lot of point data, therefore will satisfy multi-channel data acquisition.The sensor that vibration survey is used also has many types, and the branch of just measuring kind has acceleration transducer, speed pickup and displacement transducer; With regard to the sensor output signal type voltage-type and charge type are arranged, corresponding acquisition system will possess different front end signal treating apparatus and mate sensors of various types.As electric charge output type sensor, need to be equipped with charge amplifier in use and use, the most volume of hyperchannel charge amplifier on the market is bigger at present, costs an arm and a leg; Multichannel data acquisition system (DAS) is that single voltage is imported mostly, seldom possesses charge type sensor input interface.
Traditional DATA REASONING adopts wire transmission mode; data acquisition field wiring complexity; each collection all will be carried out Installation and Debugging in advance; workload is big; and building that some need detect and equipment often are in quite remote place; even relatively disperse at weather and quite abominable position or the position, measured point of geographical environment; the professional carries out quite difficulty of all kinds of regular detections; and to some buildings; when carrying out vibration survey, bridge runs into these problems through regular meeting; this just requires the data acquisition system (DAS) can be long-range and the real-time radio remote measurement, and can guarantee long-term stable operation.The comparative maturity of wireless data transmission technology development at present, there are a variety of modes to realize, CDMA, GSM, GPRS, GPS, WLAN net, Bluetooth technology etc. are wherein arranged, data transmission all has limitation but these technology are used among a small circle, as distance limit, be subjected to application scenario shielding or need the network support etc. of operator, thereby a lot of occasion can not be used above-mentioned mechanics of communication.
In a word, present vibrating data collection system adopts wire transmission mode mostly, and wiring is loaded down with trivial details, and total system is bulky, man-made fault rate height, and system stability and accuracy are difficult to guarantee, and power consumption is big; Or the wireless acquisition system that adopts has very big limitation, and it is single to connect sensor type, causes the front end signal processing capacity single, and cost is higher, is difficult for expansion, causes dirigibility, versatility to reduce greatly.
The utility model content
For solving the problems of the technologies described above, the utility model proposes a kind of vibration-testing and wireless data transmission technology field of being applied to, battery-powered, low in energy consumption and can wireless transmission the synchronous acquisition system of hyperchannel vibration data, the employing native system can be realized the wireless telemetering to vibration data, be particularly useful in weather and geographical environment are quite abominable or the measured point relatively disperses the position, the man-made fault rate is low, and system stability and accuracy are guaranteed; And can satisfy different sensors type needs, the front end signal processing capacity is various, and dirigibility, versatility are all more intense.
The utility model is realized by adopting following technical proposals:
A kind of battery powered wireless multi-channel synchronous vibration data collecting system, it is characterized in that: comprise the Data Receiving processing module of the signal of gathering being carried out data acquisition transmitter module and each collection point data-signal of reception of pre-service and emission, described data acquisition transmitter module comprises sensor signal is amplified, the sensor signal conditioning unit of zeroing and Filtering Processing, be connected and the simulating signal of nursing one's health carried out the data acquisition process unit of analog to digital conversion and data storage with described sensor signal conditioning unit, be connected with described data acquisition process unit and send the wireless data transmission unit of the data of storing and the battery power management unit of power supply is provided; Described Data Receiving processing module comprises the wireless data receiving element of the described wireless data transmission data-signal that the unit sends of wireless receiving and control described wireless data receiving element work and the data that receive is sent to high speed USB communication unit in the computing machine.
System adopts a master how from distributed system architecture, and promptly described data acquisition transmitter module is a plurality of, and the Data Receiving processing module is 1.
Described sensor signal conditioning unit comprises the charge amplifier part, the instrument amplifier part, the signal shift switch part, the programmable amplifier part, zeroing part and program control low-pass filter part, sensor signal inputs to charge amplifier part or instrument amplifier part respectively according to the classification that self is electric charge output type or voltage output type, programmable amplifier partly control described signal shift switch partly switch selection wherein the signal of a kind enter described programmable amplifier part, the zeroing part is revised sensor zero point under zero input state, and signal inputs to the programmable filter section processes after amplifying zeroing.
Described data acquisition process unit comprises one 16 ADC and single-chip microcomputer one, the signal that signal after program control amplification and filter preprocessing is converted into described ADC input quantity permission enters the data acquisition process unit, single-chip microcomputer one read described ADC translation data and will change after data storing in the storer of single-chip microcomputer, the SPI interface on single-chip microcomputer is transported to described wireless data transmission unit.
Described battery power management unit comprise external connection battery and with the voltage transitions of described external connection battery for being fit to the voltage changer of operate as normal.
The described data communication module of described high speed USB communication unit is made up of the single-chip microcomputer two of the controller of integration USB 2.0 at least, and the work of the described wireless data receiving element of single-chip microcomputer two controls also is sent to computing machine with the data that reception obtains by the usb communication line.So that the data that obtain are further analyzed and are handled, compare with the acquisition system that adopted the RS232 bus communication in the past, use the usb bus transmission can obtain faster speed.
Described wireless data transmission unit and wireless data receiving element are the embedded radio radio-frequency module, are operated in 430,868 or the 915Mhz ISM band.Have two kinds of functions of transmitting-receiving simultaneously, can realize the transmitted in both directions of data, built-in complete communication protocol and CRC error correction, automatically finish packing data (adding lead code and CRC check), only need to transmit by the wireless receiving and dispatching that the SPI interface can be finished data, satisfy the point-to-multipoint delivery of system requirements, the wireless data receiving element adopts the mode of " roll-call " that each channel data is received.The work of wireless data transmission unit and wireless data receiving element is subjected to single-chip microcomputer two controls in the single-chip microcomputer one and high speed USB communication unit in the data acquisition process unit respectively, and sending and receive required running parameter and data is all provided by single-chip microcomputer by the SPI interface.
The enlargement factor of described programmable amplifier part is 0.5,1,2,4,8,10,20,40 totally 8 kinds.
Described program control low-pass filter is partly by realizing that cutoff frequency is that the program control low pass switching capacity filter of the low-pass filtering of 1HZ-3KHZ is formed.When 32 passages all used, sampling rate can reach 0.2K the soonest, if only use the fastest 6.4K of reaching of passage.
Signal shift switch partly is the relay of single-pole double-throw (SPDT).
Advantage compared with prior art of the present utility model shows:
1, because such technical scheme that the utility model employing " comprises the Data Receiving processing module of the signal of gathering being carried out data acquisition transmitter module and each collection point data-signal of reception of pre-service and emission ", between data acquisition transmitter module and the Data Receiving processing module through the wireless mode communication, owing to adopt wireless transmission method, it is loaded down with trivial details to have solved the wire transmission mode wiring, shortcomings such as installation and maintenance inconvenience, realized wireless telemetering to vibration data, simultaneously needn't be subjected to the measured position geographical environment, influences such as weather conditions, satisfy the requirement of open-air vibration test, the man-made fault rate is low, and system stability and accuracy are guaranteed; And adopt battery power management unit to provide power supply for total system, low in energy consumption, steady operation is suitable for cold remote and open-air unattended operation environment work down for a long time; While sensor signal conditioning unit, the data acquisition process unit, the wireless data transmission unit, all be integrated in the data acquisition transmitter module with battery power management unit, and wireless data receiving element and high speed USB communication unit are integrated in the Data Receiving processing module, therefore overall volume is light and handy, be easy to carry and install, meet the requirement of portable miniaturization instrument and meter. in addition, this programme also has programmable function, the signal shift switch part can satisfy different sensors type needs, can adopt electric charge output type sensor, also can adopt voltage output type sensor, dirigibility, versatility is all more intense. and single-chip microcomputer two is controlled the work of described wireless data receiving element and the data that reception obtains is sent to computing machine by the usb communication line, so that the data that obtain are further analyzed and are handled, compare with the acquisition system that adopted the RS232 bus communication in the past, use the usb bus transmission can obtain faster speed.
2, level of integrated system height, with the charge amplifier part, the instrument amplifier part, the programmable amplifier part, program control low-pass filter part and analog to digital conversion part are in the same place with wireless transmit is partly integrated, make a module that volume is light and handy, finish data acquisition and wireless transmit function, be easy to carry and install, meet the requirement of portable miniaturization instrument and meter.
Intelligent degree height, embedded technology and computer software technology are applied to native system, the signal amplification factor of each passage can be set by supporting software systems on computers, the filtering cutoff frequency, can show in real time simultaneously, store and analyze the data of each acquisition channel, draw the parameter that vibration-testing needs.
The degree of accuracy height under the control of computing machine, according to the setup parameter operation, does not need manual intervention, has improved the accuracy of measuring; The high-precision ADC that system adopts, program control low-pass filter, programmable amplifier have improved the overall measurement accuracy of system from hardware.
The measurement dynamic range is wide, because the zeroing part can compensate the zero point of sensor, programmable amplifier can be done further amplification to the dynamic part of measuring-signal, the amplifier of relative fixed gain, can enlarge the dynamic range of test, realize measuring more accurately.
High reliability, the device that native system uses adopts the high integration programming device mostly, has simplified the design debug work of hardware circuit, use wireless transmission method simultaneously, deduct the loaded down with trivial details work of test wire, be not subjected to the geographical environment weather influence, improved reliability.
Easily extendability according to the demand of experimental measurement signal, can be expanded the acquisition channel number arbitrarily, promptly increases a remote data and gathers transmitter module.
Low-power consumption, the device of selecting for use in the system all has low energy-consumption electronic device, and programming device will enter dormant state when not working, wake up when needs work, therefore effectively saved system power dissipation, total system is low in energy consumption, steady operation is fit to open-air unattended operation environment work down for a long time.
System support software also has high generality in addition, compatibility, and fault-tolerance and maintainability, the user is as long as change the function that just can just can increase native system a little to software, for later expansion leaves bigger platform.System not only can be applied in the vibration-testing field, and sensor application that can also be by other type of coupling is in other field tests, as pressure survey, and displacement measurement, temperature survey, moisture measurement possesses the function of a tractor serves several purposes.
Description of drawings
The utility model is described in further detail below in conjunction with specification drawings and specific embodiments, wherein:
Fig. 1 the utility model one-piece construction synoptic diagram
Fig. 2 sensor signal conditioning cellular construction block diagram
Embodiment
Embodiment 1
With reference to Figure of description 1 and 2, the utility model discloses a kind of battery powered wireless multi-channel synchronous vibration data collecting system, it is characterized in that: comprise the Data Receiving processing module 8 of the signal of gathering being carried out data acquisition transmitter module 7 and each collection point data-signal of reception of pre-service and emission, described data acquisition transmitter module 7 comprises sensor signal is amplified, the sensor signal conditioning unit 1 of zeroing and Filtering Processing, be connected and the simulating signal of nursing one's health carried out the data acquisition process unit 2 of analog to digital conversion and data storage with described sensor signal conditioning unit 1, be connected with described data acquisition process unit 2 and send the wireless data transmission unit 3 of the data of storing and the battery power management unit 4 of power supply is provided; Described Data Receiving processing module 8 comprises the wireless data receiving element 5 of the described wireless data transmission of wireless receiving unit 3 data-signals that send and described wireless data receiving element 5 work of control and the data that receive is sent to high speed USB communication unit 6 in the computing machine 9.Described data acquisition transmitter module 7 is a plurality of, and Data Receiving processing module 8 is 1.
Embodiment 2
The utility model one better embodiment, the above sensor signal conditioning unit 1 comprises the charge amplifier part on the basis of embodiment 1, the instrument amplifier part, the signal shift switch part, the programmable amplifier part, zeroing part and program control low-pass filter part, sensor signal inputs to charge amplifier part or instrument amplifier part respectively according to the classification that self is electric charge output type or voltage output type, programmable amplifier partly control described signal shift switch partly switch selection wherein the signal of a kind enter described programmable amplifier part, the zeroing part is revised sensor zero point under zero input state, signal inputs to the programmable filter section processes after amplifying zeroing. and described data acquisition process unit 2 comprises one 16 ADC and single-chip microcomputer one, the signal that signal after program control amplification and filter preprocessing is converted into described ADC input quantity permission enters data acquisition process unit 2, single-chip microcomputer one read described ADC translation data and will change after data storing in the storer of single-chip microcomputer, SPI interface on single-chip microcomputer be transported to that described wireless data transmission unit 3. described battery power management unit 4 comprise external connection battery and with the voltage transitions of described external connection battery for being fit to the voltage changer of operate as normal. described high speed USB communication unit 6 described data communication modules, at least form by the single-chip microcomputer two of the controller of integration USB 2.0, single-chip microcomputer two is controlled the work of described wireless data receiving element 5 and the data that reception obtains is sent to computing machine 9. so that the data that obtain are further analyzed and handled by the usb communication line, compare with the acquisition system that adopted the RS232 bus communication in the past, use the usb bus transmission can obtain faster speed. described wireless data transmission unit 3 and wireless data receiving element 5 are the embedded radio radio-frequency module, be operated in 430,868 or the 915MhzISM frequency range. have two kinds of functions of transmitting-receiving simultaneously, can realize the transmitted in both directions of data, built-in complete communication protocol and CRC error correction, automatically finish packing data (adding lead code and CRC check), only need to transmit by the wireless receiving and dispatching that the SPI interface can be finished data, satisfy the point-to-multipoint delivery of system requirements, wireless data receiving element 5 adopts the mode of " roll-call " that each channel data is received. and the work of wireless data transmission unit 3 and wireless data receiving element 5 is subjected to single-chip microcomputer two controls in the single-chip microcomputer one and high speed USB communication unit 6 in the data acquisition process unit 2 respectively, sending and receive required running parameter and data are all provided by single-chip microcomputer by the SPI interface. the enlargement factor of described programmable amplifier part is 0.5,1,2,4,8,10,20,40 totally 8 kinds. described program control low-pass filter is partly by realizing that cutoff frequency is that the program control low pass switching capacity filter of the low-pass filtering of 1HZ-3KHZ is when forming the .32 passage and all using, sampling rate can reach 0.2K the soonest, if the relay that only to use the fastest 6.4K. of the reaching signal shift switch of channel sample rate partly be single-pole double-throw (SPDT).
Preferred forms of the present utility model is as follows:
Referring to shown in Figure 1, the utility model comprises data acquisition transmitter module 7 and Data Receiving processing module 8.Data acquisition transmitter module 7 is installed in each measured point, enter sensor signal conditioning unit 1 from the charge type signal or the voltage signal of sensor output, after program control amplification and filter preprocessing, signal is converted into the signal of ADC input range permission, enter data acquisition process unit 2, A/D converter is converted into digital signal with the simulating signal of input, single-chip microcomputer one reads the translation data of ADC, and deliver to wireless data transmission unit 3 by the SPI interface, when front module is selected, wireless data transmission unit 3 sends by radio frequency network data with data.Be in dormant state during wireless data transmission unit 3 end-of-jobs, realize low-power consumption.Wireless data receiving element 5 is responsible for receiving the packet from data acquisition transmitter module 7 in the Data Receiving processing module 8, a because more than transmitter module in the practical application, therefore receiving element adopts " roll-call " mechanism to select the signal of the different frequency range of corresponding different passages when receiving, the data that receive deposit among the FIFO of single-chip microcomputer two in the high speed USB communication unit 6, USB interface by single-chip microcomputer two is connected with computing machine 9 then, and data transmission is analyzed and handled to computing machine 9.Can set the running parameter of system by software kit on computing machine 9, the running parameter of configuration sends to the collection transmitter module of each measuring point by wireless network, controls its work.
Referring to shown in Figure 2, structured flowchart for sensor signal conditioning unit 1, the charge amplifier correspondence be the sensor of electric charge output type, the voltage output type sensor of instrument amplifier correspondence is then selected one of two parts of signals to enter to enter ADC (16Bit) after the program control amplification filtering of back and the zeroing section processes to change through the relay of a single-pole double-throw (SPDT).The control of these several parts is by single-chip microcomputer one control.
The configuration flow of the real-time synchronous acquisition pattern of 32 passages:
1. 32 passage corresponding configuration parameters are set on the software of computing machine 9, and are sent to data acquisition transmitter module 7 by USB communication unit and wireless data receiving element 5.The geocoding that each passage is corresponding unique, adopt 8 binary codings to distinguish the address, as 00000001 respective channel 1,00000010 respective channel 2,00000011 respective channel 3,00100000 respective channel 32 by that analogy, wherein 00000000 each passage of expression ADC startup command promptly all begins to start ADC when each passage all receives this address.The order that wireless data receiving element 5 singles send data is geocoding+configuration parameter decoding, after finishing, transmission waits for the affirmation signal that respective channel is beamed back, promptly do not retransmit as also receive confirmation signal above 50ms, so surpass 5 times and promptly beam back wrong indication, need the artificial working condition of checking passage to computing machine 9.Each passage all adopts this mode to transmit successively until 32 channel arrangement and finishes.
2. described configuration parameter comprises: acquisition channel number, enlargement factor, filtering cutoff frequency, sampling rate.The physics label of passage in system that acquisition channel number expression need be gathered; Signal type represents that front end connects type of sensor, is divided into two kinds of charge type and voltage-types; Signal amplification factor has 0.5,1,2,4,8,10,20,40 totally 8 kinds; The filtering cutoff frequency can be realized step-less adjustment from 1HZ～3KHZ; When 32 passages all used, sampling rate can reach 0.2K the soonest, if only use the fastest 6.4K of reaching of passage.
3. data acquisition transmitter module 7 receives configuration data by wireless data receiving element 5, one pair of configuration parameter decoding of single-chip microcomputer in the data acquisition process unit 2. enlargement factor is by three control lines, single-chip microcomputer one can be realized control to the programme-controlled instrument amplifier according to concrete enlargement factor decoding output level, and it is (000-0.5 that the enlargement factor of the binary coding correspondence of three control lines is closed; 001-1; 010-2; 011-4; 100-8; 101-10; 110-20; 111-40); The cutoff frequency of wave filter is the pulsed frequency decision by single-chip microcomputer one control IO output, can realize control according to concrete frequency is exported set frequency by the mode of timer interruption on IO square wave. whether zeroing is exactly to need by the zeroing part signal to be compensated, system finishes automatically, its principle is, single-chip microcomputer one is by software startup AD conversion, according to calculating error amount at zero point of sampled value and setting, calculate the control data of DAC again according to enlargement factor, export set bucking voltage, then restart the AD conversion, according to sampled value and zero point value compare, if greater than resolution position of bucking voltage that zero point, value was turned DAC output down, opposite then increase a bucking voltage of differentiating the position, circulation so repeatedly, the difference that is worth up to sampled value and zero point is within the range of permission.
The collecting flowchart of the real-time synchronous acquisition pattern of 32 passages:
1. after the configuration of finishing 32 passages, on computing machine 9 softwares, click and begin to gather button, computing machine 9 transfers to high speed USB communication unit 6 with startup command by USB cable, and single-chip microcomputer two regularly sends the ADC startup command by radio receiving unit by timer according to setting sample frequency.Wireless data receiving element 5 is launched startup command (address is 00000000), and this moment, each passage all can receive this address bit simultaneously, and then started ADC simultaneously, realized synchronous triggering.
2. after synchronous triggering finishes, single-chip microcomputer two begins to control 1 translation data of radio receiving unit fetch channel, the address of radio receiving unit elder generation sendaisle 1 and reading order indication, the data transmission unit of passage 1 is launched this ADC translation data after receiving order, single-chip microcomputer two detects and after radio receiving unit receives new data data read is placed among the inner FIFO, reads the data of all 32 passages successively by the mode of this roll-call.The gatherer process of a Here it is sampled point.So analogize and gather N point.
3. the software timing on the computing machine 9 reads on the single-chip microcomputer two data that receive, and single-chip microcomputer two can be sent to computing machine 9 by the USB2.0 interface with these packing data, realizes the real-time Transmission of data, Here it is once complete gatherer process.Gather the wireless real-time acquisition that just can finish data according to top process circulation.
The utility model is not limited to the foregoing description, and according to the description of the foregoing description, those of ordinary skill in the art also can carry out combination in any and conspicuous change to the foregoing description, but this does not break away from the protection domain of the utility model claim.
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