CN103207010A - High-accuracy acceleration signal detecting and analyzing device - Google Patents
High-accuracy acceleration signal detecting and analyzing device Download PDFInfo
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- CN103207010A CN103207010A CN2013100947488A CN201310094748A CN103207010A CN 103207010 A CN103207010 A CN 103207010A CN 2013100947488 A CN2013100947488 A CN 2013100947488A CN 201310094748 A CN201310094748 A CN 201310094748A CN 103207010 A CN103207010 A CN 103207010A
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Abstract
A high-accuracy acceleration signal detecting and analyzing device belongs to the field of signal detection and aims at solving the problems in the prior art of low processing speed, complex system structure and inflexible program design. The high-accuracy acceleration signal detecting and analyzing device comprises a signal detection module, a data processing module and a data analyzing software module. The signal detection module comprises an acceleration sensor unit and a signal conditioning unit. The data processing module comprises a filtering circuit unit, an analog/digital (A/D) conversion circuit unit, a programmable logic processing unit, a data storage unit and an internet access communication unit. The data analyzing software module comprises a data receiving unit, a command transmitting unit, a data time domain analyzing unit and a data frequency domain analyzing unit. The high-accuracy acceleration signal detecting and analyzing device achieves quick processing of data through a field programmable gate array (FPGA), simplifies system structure design, improves program design flexibility, achieves quick communication of the data, integrates data acquisition, processing and analyzing, and improves system flexibility and operability.
Description
Technical field
The invention belongs to the signal detection technique field, relate to a kind of acceleration signal and detect and analytical equipment, be specifically related to a kind of device that detects and analyze the telescopical vibration acceleration signal of heavy caliber that is applicable to.
Background technology
The heavy caliber telescope is in the process of accurate tracking target, and telescopical pitch axis needs to rotate within the specific limits.Along with the rotation of minute surface will produce high-frequency vibration signal, high-frequency vibration signal has not only reflected the stressing conditions of the minute surface strong point, and telescopical accuracy of observation is had bigger influence.Vibration signal need accurately detect and analyze telescopical vibration acceleration signal to telescopical influence in the rotation process in order to estimate.Traditional vibration signal detection method adopts single-chip digital signal processor DSP to carry out the collection of signal usually, and digital signal processor DSP exists in the collection of carrying out signal and when handling that processing speed is slow, system architecture is complicated, the shortcoming of program design underaction; And prior art does not provide a kind of integrating device to vibration signal detection and data analysis.
Summary of the invention
The objective of the invention is to solve the deficiencies in the prior art, provide a kind of integrated vibration signal based on high-speed programmable logic processor and data analysis software to detect and analytical equipment.
For achieving the above object, detection of the present invention and analytical equipment comprise signal detection module, data processing module and data analysis software module;
Described signal detection module comprises acceleration transducer unit and signal condition unit; Described data processing module comprises filtering circuit unit, A/D conversion circuit unit, FPGA (Field Programmable Gate Array) processing unit, data storage cell and network interface communication unit; Described data analysis software module data receiving element, instruction sending unit, data time-domain analysis unit and data frequency-domain analysis unit;
The signal condition unit of described signal detection module is connected with the filtering circuit unit of described data processing module, and the network interface communication unit of described data processing module is connected with described data analysis software module;
Signal detection module carries out the signal adjustment with the acceleration electric signal that receives, voltage signal with respective magnitudes is passed to data processing module, described voltage signal is converted to binary digit amount by the A/D conversion circuit unit with signal through the filtering circuit unit of data processing module filtering noise, sample frequency by described FPGA (Field Programmable Gate Array) processing unit control A/D, by the exchanges data of network interface communication unit realization with the data analysis software module, carry out data analysis by the data analysis software module, obtain time-domain curve and the spectrogram of vibration signal.
The acceleration transducer unit of described signal detection module is connected with the signal condition unit, and described acceleration transducer unit comprises that a sensitivity reaches 10
-3The piezoelectric sensor of g; Described signal condition unit comprises amplifier and wave filter.
The filtering circuit unit of described data processing module is the single order passive low ventilating filter; Described A/D conversion circuit unit comprises bipolarity A/D sampling A and a slice high precision 2.5V reference power source chip of 16 of a slices; The core of described FPGA (Field Programmable Gate Array) processing unit is a slice fpga chip; Described data storage cell is read and write by the FPGA (Field Programmable Gate Array) control module, the A/D translation data that buffer memory is 16, and the capacity of data storage cell reaches 512K.
The data receiving element of described data analysis software module is used for arranging the parameter that network interface is communicated by letter with instruction sending unit; The data receiving element receives the A/D translation data from the FPGA (Field Programmable Gate Array) processing unit of signal detection module; Instruction sending unit sends the data-switching steering order to the FPGA of signal detection module.
The data time-domain analysis unit of described data analysis software module is converted into actual vibration signal accekeration with the A/D translation data that receives, and obtains the time-domain curve of acceleration signal.
The data frequency-domain analysis unit of described data analysis software module is converted into actual vibration signal accekeration with the A/D translation data that receives, and obtains power spectrum.
Beneficial effect of the present invention is: the invention provides a kind of integrated acceleration signal and detect and analytical equipment, be applicable to the vibration acceleration signal analysis of heavy caliber telescope, large-scale control tower or buildings, realized the fast processing of data by programmable logic processor FPGA, simplified system structure design, strengthen the dirigibility of program design, realized the high-speed traffic of data; Collection data acquisition, processing and analysis are one, improve the dirigibility of system, operability, integrated level height, highly versatile, precision height.
Description of drawings
Fig. 1 is the structured flowchart of a kind of high precision acceleration signal detection of the present invention and analytical equipment;
Fig. 2 is low-pass first order filter circuit diagram of the present invention;
Fig. 3 is programmable logic processor FPGA of the present invention and peripheral circuit schematic diagram thereof;
Fig. 4 is programmable logic processor FPGA functional block diagram of the present invention;
Fig. 5 is network interface communication chip DM9000EP circuit diagram of the present invention;
Fig. 6 is network interface interface circuit figure of the present invention;
Fig. 7 is the software flow pattern that programmable logic processor FPGA of the present invention handles vibration signal.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further.
Referring to accompanying drawing 1, for achieving the above object, detection of the present invention and analytical equipment comprise signal detection module, data processing module and data analysis software module;
Described signal detection module comprises acceleration transducer unit and signal condition unit; Described data processing module comprises filtering circuit unit, A/D conversion circuit unit, FPGA (Field Programmable Gate Array) processing unit, data storage cell and network interface communication unit; Described data analysis software module comprises data receiving element, instruction sending unit, data time-domain analysis unit and data frequency-domain analysis unit.
The data receiving element of described data analysis software module and the function of instruction sending unit comprise the parameter that network interface is communicated by letter are set, and receive from the A/D translation data of FPGA (Field Programmable Gate Array) processing unit and to FPGA and send the data-switching steering order; The data time-domain analysis unit of described data analysis software module at first is converted into the A/D translation data that receives actual vibration signal accekeration, be the longitudinal axis then with the accekeration, time is transverse axis, and the time-domain curve of the acceleration signal that draws is in order to carry out data analysis; The A/D translation data that the data frequency-domain analysis unit of described data analysis software module is responsible for receiving is converted into actual vibration signal accekeration, then the accekeration sequence is carried out power spectrumanalysis, obtain power spectrum, the longitudinal axis unit of power spectrum is dB, and transverse axis unit is Hz.
The signal condition unit of described signal processing unit is connected with the filtering circuit unit of described data processing module, and the network interface communication unit of described data processing module is connected with described data analysis software module.
Signal detection module carries out the signal adjustment with the acceleration electric signal that receives, voltage signal with respective magnitudes is passed to data processing module, described voltage signal is converted to binary digit amount by the A/D conversion circuit unit with signal through the filtering circuit unit of data processing module filtering noise, sample frequency by described FPGA (Field Programmable Gate Array) processing unit control A/D, by the exchanges data of network interface communication unit realization with the data analysis software module, carry out data analysis by the data analysis software module, obtain time-domain curve and the spectrogram of vibration signal.
The acceleration transducer unit of described signal detection module adopts the piezoelectric sensor-731A of Meggitt company, and the acceleration range of detection is ± 0.5g that the sensitivity of 731A reaches 10
-3G(g is acceleration of gravity), can detect faint acceleration signal variable quantity.
Signal condition unit-the P31 of described signal detection module is connected with the acceleration sensing unit, receives the electric signal from acceleration transducer, through internal noise extremely low amplifier and the interior voltage signal of wave filter output ± 10V scope.
Referring to accompanying drawing 2, the filter unit of described data processing module adopts the single order passive low ventilating filter, voltage signal from the signal condition unit at first passes through the passive low-pass first order filter that R1, R2 and C1 form, and then the voltage follower by being formed by precision operational-amplifier, obtain the lower aanalogvoltage input signal of noise at last; For prevent tested voltage exceed the A/D conversion chip ± 10V voltage measurement scope, adopt the voltage clamp circuit of being formed by D1, D2 make measured voltage remain at ± the 10V scope in.
The function of the A/D conversion circuit unit of described data processing module is that the detection signal with input end is converted to binary digital quantity, and is input to the FPGA (Field Programmable Gate Array) processing unit by 16 bit parallel data buss; The A/D change-over circuit adopts 16 bipolarity A/D sampling A AD7656, and its voltage acquisition scope is set to ± 10V; Reference voltage 2.5V is provided by the AD780BR chip, and AD780BR chip precision reaches 0.04%, has guaranteed the precision of voltage acquisition effectively.
Referring to accompanying drawing 3, the control signal CONVST of AD7656 chip, CS, RD, BUSY, RESET and 16 bit parallel data buss all are connected on the I/O of FPGA, carry out reading of A/D conversion and control and 16 translation data by the inner sequential circuit of FPGA.
The FPGA (Field Programmable Gate Array) processing unit of described data processing module adopts fpga chip EP3C40F324, it is responsible for controlling the sample frequency of A/D and periodically reads 16 translation data from the A/D chip, and stores data in the fifo register of inner 10 the byte degree of depth of FPGA; In order to increase the smoothness of sampled data, adopting the mean filter method that the data in the fifo register are carried out filtering handles, data after then filtering being handled are stored in the data storage cell, require data are sent to the data receiving element by network interface according to instruction sending unit at last, programmable logic processor FPGA functional block diagram as shown in Figure 4.
The data storage cell employing capacity of described data processing module is 16 sram chip IS61LV51216 of 512K, 16 bit data is write among the SRAM by control signal WE, CE, OE address bus XA0～18 and data bus XD0～15 at the FPGA finish time of each A/D sampling; After the transmission instruction that receives data analysis software, FPGA reads and sends to upper computer software by above-mentioned signal with 16 bit data more successively.
The network interface communication unit of described data processing module adopts network controller DM9000EP, it is connected as shown in Figure 3 with the signal of FPGA, the circuit diagram of DM9000EP, as shown in Figure 5, FPGA realizes the DM9000EP internal register is visited by control signal RESET, AEN, WAIT, OR, OW, CMD and INT.Differential signal TX+, the TX-of DM9000EP, RX+, RX-realize that with being connected by network interface HR911103A of host computer network interface interface circuit figure as shown in Figure 6.
The data of described data analysis software module receive and comprise with the function of instruction sending unit the parameter that network interface communicate by letter is set, and reception is from the A/D translation data of FPGA (Field Programmable Gate Array) processing unit and to FPGA transmission data-switching steering order.
The data time-domain analysis unit of described data analysis software module at first is converted into the A/D translation data that receives actual vibration signal accekeration, be the longitudinal axis then with the accekeration, time is transverse axis, and the time-domain curve of the acceleration signal that draws is in order to carry out data analysis.
The A/D translation data that the data frequency-domain analysis unit of data analysis software module is responsible for receiving is converted into actual vibration signal accekeration, then the accekeration sequence is carried out power spectrumanalysis, obtain power spectrum, the longitudinal axis unit of power spectrum is dB, and transverse axis unit is Hz.
Referring to accompanying drawing 7, the concrete course of work that programmable logic processor FPGA handles vibration signal is: judge that at first the inner network interface data of FPGA receive the A/D conversion sign on whether program receives instruction sending unit, if the sign on of receiving, FPGA carries out voltage sample with the 10k sample frequency to the acceleration analysis signal; A/D conversion back FPGA reads 16 voltage transitions data and stores data in 16 fifo registers of inner 10 the byte degree of depth of FPGA; In order to increase the smoothness of sampled data, adopt the mean filter method that the data in the fifo register are carried out filtering and handle, the data after then filtering being handled are stored among the SRAM.After each sampling period finished, the FPGA program judged whether to receive to upper computer software and sends data command, if do not receive instruction, then continued the next A/D sampling period of beginning; Otherwise the data of storing among the SRAM are sent to upper computer software by network interface, and empty SRAM.Upper computer software receives acceleration signal and detects after the data, time-domain curve and spectrogram that time-domain analysis unit and frequency-domain analysis unit by data analysis software obtains vibration acceleration signal are with convenient stressing conditions and the control accuracy of analyzing tested device.
Claims (6)
1. a high precision acceleration signal detects and analytical equipment, it is characterized in that, comprises signal detection module, data processing module and data analysis software module;
Described signal detection module comprises acceleration transducer unit and signal condition unit; Described data processing module comprises filtering circuit unit, A/D conversion circuit unit, FPGA (Field Programmable Gate Array) processing unit, data storage cell and network interface communication unit; Described data analysis software module data receiving element, instruction sending unit, data time-domain analysis unit and data frequency-domain analysis unit;
The signal condition unit of described signal detection module is connected with the filtering circuit unit of described data processing module, and the network interface communication unit of described data processing module is connected with described data analysis software module;
Signal detection module carries out the signal adjustment with the acceleration electric signal that receives, voltage signal with respective magnitudes is passed to data processing module, described voltage signal is converted to binary digit amount by the A/D conversion circuit unit with signal through the filtering circuit unit of data processing module filtering noise, sample frequency by described FPGA (Field Programmable Gate Array) processing unit control A/D, by the exchanges data of network interface communication unit realization with the data analysis software module, carry out data analysis by the data analysis software module, obtain time-domain curve and the spectrogram of vibration signal.
2. a kind of high precision acceleration signal according to claim 1 detects and analytical equipment, it is characterized in that, the acceleration transducer unit of described signal detection module is connected with the signal condition unit, and described acceleration transducer unit comprises that a sensitivity reaches 10
-3The piezoelectric sensor of g; Described signal condition unit comprises amplifier and wave filter.
3. a kind of high precision acceleration signal according to claim 1 detects and analytical equipment, it is characterized in that the filtering circuit unit of described data processing module is the single order passive low ventilating filter; Described A/D conversion circuit unit comprises bipolarity A/D sampling A and a slice high precision 2.5V reference power source chip of 16 of a slices; The core of described FPGA (Field Programmable Gate Array) processing unit is a slice fpga chip; Described data storage cell is read and write by the FPGA (Field Programmable Gate Array) control module, the A/D translation data that buffer memory is 16, and the capacity of data storage cell reaches 512K.
4. a kind of high precision acceleration signal according to claim 1 detects and analytical equipment, it is characterized in that, the data receiving element of described data analysis software module is used for arranging the parameter that network interface is communicated by letter with instruction sending unit; The data receiving element receives the A/D translation data from the FPGA (Field Programmable Gate Array) processing unit of signal detection module; Instruction sending unit sends the data-switching steering order to the FPGA of signal detection module.
5. a kind of high precision acceleration signal according to claim 1 detects and analytical equipment, it is characterized in that, the data time-domain analysis unit of described data analysis software module is converted into actual vibration signal accekeration with the A/D translation data that receives, and obtains the time-domain curve of acceleration signal.
6. a kind of high precision acceleration signal according to claim 1 detects and analytical equipment, it is characterized in that, the data frequency-domain analysis unit of described data analysis software module is converted into actual vibration signal accekeration with the A/D translation data that receives, and obtains power spectrum.
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Cited By (8)
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| CN105716479A (en) * | 2016-01-18 | 2016-06-29 | 南京理工大学 | Accelerated speed recording device applied to range test |
| CN106441554A (en) * | 2016-10-18 | 2017-02-22 | 华南农业大学 | Mountainous orchard double-rail conveyer vibration testing system and testing method |
| CN106768299A (en) * | 2016-12-30 | 2017-05-31 | 西安奇维科技有限公司 | A kind of real-time vibration monitor system of aircraft based on acceleration transducer and method |
| CN107651649A (en) * | 2016-07-26 | 2018-02-02 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of passive array formula MEMS sensor of numeral output |
| CN109084885A (en) * | 2018-08-14 | 2018-12-25 | 中国科学院上海高等研究院 | A kind of mechanical equipment vibration detection system, method, readable storage medium storing program for executing and terminal |
| CN109737955A (en) * | 2018-12-14 | 2019-05-10 | 南京理工大学 | A kind of attitude prediction method of wave compensation system |
| CN110849461A (en) * | 2019-12-04 | 2020-02-28 | 江苏方天电力技术有限公司 | Phase modulator vibration signal acquisition and storage method and system |
| CN114295198A (en) * | 2022-01-14 | 2022-04-08 | 上海测振自动化仪器有限公司 | Intelligent vibration sensor and control method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105716479A (en) * | 2016-01-18 | 2016-06-29 | 南京理工大学 | Accelerated speed recording device applied to range test |
| CN105716479B (en) * | 2016-01-18 | 2017-10-13 | 南京理工大学 | A kind of accelerogram device applied to shooting range measurment |
| CN107651649A (en) * | 2016-07-26 | 2018-02-02 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of passive array formula MEMS sensor of numeral output |
| CN106441554A (en) * | 2016-10-18 | 2017-02-22 | 华南农业大学 | Mountainous orchard double-rail conveyer vibration testing system and testing method |
| CN106768299A (en) * | 2016-12-30 | 2017-05-31 | 西安奇维科技有限公司 | A kind of real-time vibration monitor system of aircraft based on acceleration transducer and method |
| CN106768299B (en) * | 2016-12-30 | 2019-07-12 | 西安奇维科技有限公司 | A kind of real-time vibration monitor system of aircraft based on acceleration transducer and method |
| CN109084885A (en) * | 2018-08-14 | 2018-12-25 | 中国科学院上海高等研究院 | A kind of mechanical equipment vibration detection system, method, readable storage medium storing program for executing and terminal |
| CN109737955A (en) * | 2018-12-14 | 2019-05-10 | 南京理工大学 | A kind of attitude prediction method of wave compensation system |
| CN110849461A (en) * | 2019-12-04 | 2020-02-28 | 江苏方天电力技术有限公司 | Phase modulator vibration signal acquisition and storage method and system |
| CN110849461B (en) * | 2019-12-04 | 2021-08-31 | 江苏方天电力技术有限公司 | Phase modulator vibration signal acquisition and storage method and system |
| CN114295198A (en) * | 2022-01-14 | 2022-04-08 | 上海测振自动化仪器有限公司 | Intelligent vibration sensor and control method thereof |
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Application publication date: 20130717 |