CN102426052A - Vibration wire type data acquisition system and method - Google Patents
Vibration wire type data acquisition system and method Download PDFInfo
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- CN102426052A CN102426052A CN2011102743414A CN201110274341A CN102426052A CN 102426052 A CN102426052 A CN 102426052A CN 2011102743414 A CN2011102743414 A CN 2011102743414A CN 201110274341 A CN201110274341 A CN 201110274341A CN 102426052 A CN102426052 A CN 102426052A
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Abstract
The invention discloses a vibration wire type data acquisition system and method. The vibration wire type data acquisition system comprises a vibration wire type sensor, a path selecting circuit, an exciting circuit, a vibration pick-up circuit, a power management circuit and a processor, as well as an FPGA (Field Programmable Gata Array) circuit, wherein the processor generates and sends a preliminary test exciting frequency control word to the FPGA circuit, the FPGA circuit controls the exciting circuit to generate a pulse signal to excite the vibration wire type sensor after shaping a sine analog signal, and the FPGA circuits samples the output frequency value of the vibration pick-up circuit and transfers the output frequency value to the processor. According to the invention, a low-voltage frequency searching exciting manner is adopted, an acquisition device can read out the frequency value of the sensor just through operating 3-5 times; therefore, the efficiency of the vibration wire type data acquisition system is improved. In addition, because the vibration wire type data acquisition system is provided with a lightning protection circuit, a built-in temperature sensing circuit, a resistance type temperature sensor and a power supply voltage alarm circuit, the vibration wire type data acquisition system is safer.
Description
Technical field
The present invention relates to a kind of sensor acquisition device, especially relate to a kind of type vibration wire data acquisition system (DAS) and method.
Background technology
Continuous development along with various engineering constructions such as different kinds of roads, bridge, water conservancies; Engineering safety caused concern and the attention that People more and more is many; And safety monitoring and early warning have critical role undoubtedly therein; The exciting mode that the traditional data harvester is adopted is generally high pressure manipulate the strings exciting and low pressure frequency sweep exciting dual mode, but these the two kinds exciting modes of manipulating the strings all have significant limitation.High pressure is manipulated the strings, and to have a sensor string wire vibration duration short for exciting mode, and signal is difficult for picking up, and measuring accuracy is poor, and be prone to make the sensor string wire aging and make the shortcoming of sensor failure.Though and low pressure frequency sweep exciting mode has been protected string wire, all be to remove exciting as the one of which, thereby exciting cycle and test period are all long by the continuous impulse that lower-frequency limit is swept to upper frequency limit.
Summary of the invention
The purpose of this invention is to provide a kind of low pressure that adopts and seek the type vibration wire data acquisition unit of exciting mode frequently, promptly collector applies low pressure frequency near vibrating string type sensor to sensor, thereby makes the firm string of sensor produce vibration;
Another object of the present invention provides a kind of low pressure that adopts and seeks the type vibration wire collecting method of exciting mode frequently.
To achieve these goals; The invention provides a kind of type vibration wire data acquisition system (DAS); Comprise vibrating string type sensor, channel selection circuit, excitation chain, pick-up circuit, electric power management circuit and processor; Said vibrating string type sensor sends to said channel selection circuit with oscillator signal; Said channel selection circuit passes to the pick-up circuit with the oscillator signal of vibrating string type sensor, and said excitation chain produces the string wire of pulse signal through channel selection circuit exciting vibrating string type sensor, and said pick-up circuit amplifies shaping to the oscillation frequency value to be handled; Said processor produces preliminary examination excited frequency control word; Said processor receives and calculates output frequency value, and said type vibration wire data acquisition system (DAS) also comprises FPGA (Field-Programmable Gate Array, field programmable gate array) circuit; Processor produces and sends preliminary examination excited frequency control word and gives the FPGA circuit; The FPGA circuit converts this preliminary examination excited frequency control word to its corresponding Digital Discrete signal, and the Digital Discrete signal that said FPGA circuit produces is got back to said FPGA circuit through the wave filter of said excitation chain after converting sinusoidal simulating signal to through excitation chain, said FPGA circuit to this sine simulating signal shaping after the said excitation chain of control produce pulse signal; The output frequency value of said FPGA circuit sampling pick-up circuit also passes to processor.
Said type vibration wire data acquisition unit also comprises the resistor-type temperature sensor; Said resistor-type temperature sensor is used to monitor the temperature of vibrating string type sensor; Said vibrating string type sensor transmits signal and gives the resistor-type temperature sensor; Said resistor-type temperature sensor sends differential signal to channel selection circuit, can effectively monitor the alarm of vibrating string type sensor.
Said type vibration wire data acquisition unit is provided with resistance-freq converting circuit between said channel selection circuit and FPGA circuit; Said channel selection circuit sends the differential signal that the resistor-type temperature sensor sends to resistance-freq converting circuit; Said resistance-freq converting circuit is sent the waveform that produces into the FPGA circuit, and said FPGA circuit produces the output frequency value of this waveform and output frequency value is sent into processor.
Said type vibration wire data acquisition unit also comprises the built-in temperature sensing circuit; Also comprise the built-in temperature sensing circuit; Said built-in temperature sensing circuit is used to monitor the temperature of said type vibration wire data acquisition unit, and sends Monitoring Data to processor, can effectively monitor this self alarm of invention.
Said type vibration wire data acquisition unit also comprises the supply voltage warning circuit, and when the supply voltage of equipment was lower than preset value, said supply voltage warning circuit transmission level signal was given processor, can effectively monitor the present invention's self alarm.
Said type vibration wire data acquisition unit is provided with lightning protection circuit between vibrating string type sensor and channel selection circuit; Said lightning protection circuit mainly is made up of discharge tube, voltage dependent resistor (VDR) and anti-Transient Voltage Suppressor; Said lightning protection circuit is used to protect said type vibration wire data acquisition unit not broken by thunder and lightning, makes the present invention safer.
The present invention also provides a kind of collecting method based on the type vibration wire data acquisition system (DAS); Said excitation chain produces the firm string of pulse signal exciting vibrating string type sensor; The oscillator signal that vibrating string type sensor produces is sent to the pick-up circuit through said channel selection circuit; Processor read frequency value, further comprising the steps of:
A1, said processor produce the preliminary examination frequency control word and send to the FPGA circuit;
A2, said FPGA circuit convert the preliminary examination frequency control word to this preliminary examination frequency control word pairing Digital Discrete signal;
A3, said excitation chain become sinusoidal simulating signal with the Digital Discrete conversion of signals that the FPGA circuit produces;
A4, said excitation chain offset of sinusoidal simulating signal carry out sending to the FPGA circuit after the Filtering Processing;
A5, said FPGA circuit carry out shaping to filtered sinusoidal simulating signal, send to excitation chain then;
A6, said pick-up circuit amplify this oscillator signal, send the FPGA circuit to after the shaping;
A7, said FPGA circuit send output frequency value and give processor;
A8, the frequency values of reading according to processor, processor generates the correspondent frequency control word and this frequency control word is sent to the FPGA circuit;
A9, processor judge whether once more the step of exciting.
In sum; Owing to adopted technique scheme; The invention has the beneficial effects as follows: use low pressure to seek exciting mode frequently, collector only need 3-5 time just can pickup frequency values, improved the efficient of type vibration wire data acquisition system (DAS); Because said type vibration wire data acquisition system (DAS) is provided with lightning protection circuit, built-in temperature sensing circuit, resistor-type temperature sensor and supply voltage warning circuit, makes the present invention safer.
Description of drawings
The present invention will explain through example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is type vibration wire data acquisition unit circuit theory diagrams;
Fig. 2 is a type vibration wire data acquisition unit process flow diagram.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Shown in Fig. 1; A kind of type vibration wire data acquisition system (DAS); Comprise vibrating string type sensor 1, channel selection circuit 2, excitation chain 3, pick-up circuit 4, electric power management circuit 5 and processor 6; Said channel selection circuit 2 is that to select 1 final election device, chip model be that 4 of ADG1609 selects 1 final election device, G3VM-2 photoelectric relay to form to 8 of ADG1608 by the chip model mainly; Said excitation chain 3 is that digital-to-analog signal converter, chip AD827, the G3VM-2 photoelectric relay of AD5330 formed by the chip model mainly; Said pick-up circuit 4 is that the comparison reshaper that the BPF. of AD827, two-stage amplifier that the chip model is AD827 and chip model are AD970 is formed by the chip model mainly; Electric power management circuit 5 is that the power supply changeover device that the power supply changeover device of LM2596-5.0, power supply changeover device that the chip model is AM1117-3.3 and chip model are ADP3338-1.5 is formed by 25W Switching Power Supply, chip model mainly, and processor 6 is selected the C8051F340 single-chip microcomputer for use;
Said vibrating string type sensor 1 sends to said channel selection circuit 2 with oscillator signal; Said channel selection circuit 2 passes to pick-up circuit 4 with the oscillator signal of vibrating string type sensor 1; Said excitation chain 3 produces the string wire of pulse signal through channel selection circuit 2 exciting vibrating string type sensors 1; 4 pairs of oscillation frequency values of said pick-up circuit are amplified shaping and are handled; Said processor 6 produces preliminary examination excited frequency control word; Said processor 6 receives and calculates output frequency value, and said type vibration wire data acquisition system (DAS) also comprises FPGA circuit 7, the EP1C3T144C8 chip that said FPGA circuit selects for use ALTERA company to produce; Excitation chain 3, pick-up circuit 4 and processor 6 all are connected with FPGA circuit 7; Processor 6 sends preliminary examination excited frequency control word and gives FPGA circuit 7, and FPGA circuit 7 converts this preliminary examination excited frequency control word to its corresponding Digital Discrete signal, gets back to said FPGA circuit 7 through the wave filter of said excitation chain 3 after the Digital Discrete signal that said FPGA circuit 7 produces converts sinusoidal simulating signal to through excitation chain 3; 7 pairs in said FPGA circuit should be controlled said excitation chain 3 generation pulse signals after the shaping of sine simulating signal, and said excitation chain 3 produces the string wire of pulse signals through channel selection circuit 2 exciting vibrating string type sensors 1; The output frequency value of said FPGA circuit 7 sampling pick-up circuit 4 also passes to processor 6.
Said type vibration wire data acquisition system (DAS) also comprises resistor-type temperature sensor 8; Said resistor-type temperature sensor 8 is used to monitor the temperature of vibrating string type sensor; Said vibrating string type sensor transmits signal and gives resistor-type temperature sensor 8; Said resistor-type temperature sensor 8 sends differential signal to channel selection circuit 2; Said type vibration wire data acquisition system (DAS) is provided with resistance-freq converting circuit 9 between said channel selection circuit 2 and FPGA circuit 7; Said resistance-freq converting circuit 9 mainly is made up of the NE555D timer; The differential signal that said channel selection circuit 2 sends resistor-type temperature sensor 8 sends resistance-freq converting circuit 9 to, and said resistance-freq converting circuit 9 is sent the waveform that produces into FPGA circuit 7, and said FPGA circuit 7 produces the output frequency value of this waveform and output frequency value is sent into processor 6;
The differential signal that resistor-type temperature sensor 8 produces is sent to resistance-frequency converter 9 through said channel selection circuit 2; Resistance-frequency converter 9 sends to FPGA circuit 7 with the waveform that produces; FPGA circuit 7 produces the output frequency value of this waveform and this output frequency value is sent to processor 6; Processor 6 calculates the resistance of resistor-type temperature sensor 8, and the corresponding formula of the resistance that processor 6 provides according to resistor-type temperature sensor 8-temperature draws the temperature value of vibrating string type sensor 1.
Said type vibration wire data acquisition system (DAS) also comprises built-in temperature sensing circuit 10; Said built-in temperature sensing circuit 10 is selected the DS18B20 digital temperature sensor for use, and said built-in temperature sensing circuit 10 is monitored the temperature of said type vibration wire data acquisition system (DAS) and sent Monitoring Data to processor 6.
Said type vibration wire data acquisition system (DAS) also comprises supply voltage warning circuit 11; Said supply voltage warning circuit 11 adopts the CE8808N27M low-voltage detection circuit; When the supply voltage of equipment was lower than 2.7V, said supply voltage warning circuit 11 transmission level signals were given processor 6.
Said type vibration wire data acquisition unit is provided with lightning protection circuit 12 between vibrating string type sensor 1 and channel selection circuit 2; Said lightning protection circuit 12 mainly is made up of gas-discharge tube, voltage dependent resistor (VDR) and anti-Transient Voltage Suppressor; Said lightning protection circuit is ripe prior art; Repeat no more at this, said lightning protection circuit is used to protect said type vibration wire data acquisition unit not broken by thunder and lightning.
The STM32F107 single-chip microcomputer that said processor 6 also can select for use ARM company to produce.
As shown in Figure 2, a kind of collecting method based on the type vibration wire data acquisition system (DAS), said processor 6 is connected with FPGA circuit 7, and processor 6 produces the preliminary examination frequency control word and sends to FPGA circuit 7.
Said FPGA circuit 7 converts the preliminary examination frequency control word to this preliminary examination frequency control word pairing Digital Discrete signal; Said FPGA circuit 7 sends to excitation chain 3 with the Digital Discrete signal; The digital-to-analog signal converter of said excitation chain 3 becomes sinusoidal simulating signal with the Digital Discrete conversion of signals; Said sinusoidal simulating signal carries out sending to FPGA circuit 7 after the Filtering Processing through chip AD827; 7 pairs of filtered sinusoidal simulating signals of said FPGA circuit are carried out shaping, send to the G3VM-2 photoelectric relay of excitation chain 3 then, thereby make said excitation chain 3 produce the firm string of pulse signal exciting vibrating string type sensor.
The oscillator signal that said vibrating string type sensor 1 produces is sent to the BPF. of pick-up circuit 4 through said channel selection circuit 2; Carrying out sending into two-stage amplifier after the Filtering Processing amplifies; Two-stage amplifier sends this signal to the AD970 comparer and carries out the shaping processing; AD970 sent output frequency value and gives FPGA circuit 7 after shaping was accomplished; The output frequency value of 7 pairs of pick-up circuit 4 of said FPGA circuit is sampled, and said FPGA circuit 7 sends output frequency value and gives processor 6, processor 6 read frequency values; Processor 6 judges whether repeatedly exciting, and when needs repeatedly exciting the time, according to the frequency values of reading, processor 6 generates the correspondent frequency control words and this frequency control word is sent to the FPGA circuit.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (7)
1. type vibration wire data acquisition unit; Comprise vibrating string type sensor (1), channel selection circuit (2), excitation chain (3), pick-up circuit (4), electric power management circuit (5) and processor (6); Said vibrating string type sensor (1) sends to said channel selection circuit (2) with oscillator signal; Said channel selection circuit (2) passes to pick-up circuit (4) with the oscillator signal of vibrating string type sensor (1); Said excitation chain (3) produces the string wire of pulse signal through channel selection circuit (2) exciting vibrating string type sensor (1); Said pick-up circuit (4) amplifies shaping to the oscillation frequency value to be handled; Said processor (6) produces preliminary examination excited frequency control word; Said processor (6) receives and calculates output frequency value, it is characterized in that: also comprise FPGA circuit (7), processor (6) produces and sends preliminary examination excited frequency control word and gives FPGA circuit (7); FPGA circuit (7) converts this preliminary examination excited frequency control word to its corresponding Digital Discrete signal; The Digital Discrete signal that said FPGA circuit (7) produces converts sinusoidal simulating signal to through the digital-to-analog signal converter of excitation chain (3), and this sine simulating signal is got back to said FPGA circuit (7) through the wave filter of said excitation chain (3), said FPGA circuit (7) to this sine simulating signal shaping after the said excitation chain of control (3) generation pulse signal; The output frequency value of said FPGA circuit (7) sampling pick-up circuit (4) also passes to processor (6).
2. type vibration wire data acquisition unit according to claim 1; It is characterized in that: also comprise resistor-type temperature sensor (8); Said resistor-type temperature sensor (8) is used to monitor the temperature of vibrating string type sensor (1); Said vibrating string type sensor transmits signal and gives resistor-type temperature sensor (8), and said resistor-type temperature sensor (8) sends differential signal to channel selection circuit (2).
3. type vibration wire data acquisition unit according to claim 1 and 2; It is characterized in that: between said channel selection circuit (2) and FPGA circuit (7), be provided with resistance-freq converting circuit (9); The differential signal that said channel selection circuit (2) sends resistor-type temperature sensor (8) sends resistance-freq converting circuit (9) to; Said resistance-freq converting circuit (9) is sent the waveform that produces into FPGA circuit (7), and said FPGA circuit (7) produces the output frequency value of this waveform and output frequency value is sent into processor (6).
4. type vibration wire data acquisition unit according to claim 1; It is characterized in that: also comprise built-in temperature sensing circuit (10); Said built-in temperature sensing circuit (10) is used to monitor the temperature of said type vibration wire data acquisition unit, and sends Monitoring Data to processor (6).
5. type vibration wire data acquisition unit according to claim 1; It is characterized in that: also comprise supply voltage warning circuit (11); When the supply voltage of equipment was lower than preset value, said supply voltage warning circuit (11) transmission level signal was given processor (6).
6. type vibration wire data acquisition unit according to claim 1 is characterized in that: between vibrating string type sensor (1) and channel selection circuit (2), be provided with lightning protection circuit (12).
7. collecting method based on the type vibration wire data acquisition system (DAS); Said excitation chain (3) produces the firm string of pulse signal exciting vibrating string type sensor; The oscillator signal that vibrating string type sensor produces is sent to pick-up circuit (4) through said channel selection circuit (2); Processor (6) read frequency value is characterized in that further comprising the steps of:
A1, said processor (6) produce the preliminary examination frequency control word and send to FPGA circuit (7);
A2, said FPGA circuit (7) convert the preliminary examination frequency control word to this preliminary examination frequency control word pairing Digital Discrete signal;
A3, said excitation chain (3) become sinusoidal simulating signal with the Digital Discrete conversion of signals that FPGA circuit (7) produces;
A4, said excitation chain (3) offset of sinusoidal simulating signal carry out sending to FPGA circuit (7) after the Filtering Processing;
A5, said FPGA circuit (7) carry out shaping to filtered sinusoidal simulating signal, send to excitation chain (3) then;
A6, said pick-up circuit (4) amplify this oscillator signal, send FPGA circuit (7) to after the shaping;
A7, said FPGA circuit (7) send output frequency value and give processor (6);
A8, the frequency values of reading according to processor (6), processor (6) generates the correspondent frequency control word and this frequency control word is sent to the FPGA circuit;
A9, processor judge whether once more the step of exciting.
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| CN104764482A (en) * | 2015-04-14 | 2015-07-08 | 上海同磊土木工程技术有限公司 | Multifunctional full-automatic acquisition instrument with vibration wire sensors |
| CN105069894A (en) * | 2015-05-13 | 2015-11-18 | 恒银金融科技有限公司 | Hall-type detection device used for detecting thickness of paper money |
| CN105115590A (en) * | 2015-08-28 | 2015-12-02 | 苏州市博得立电源科技有限公司 | Environmental noise measuring instrument based on sine wave inverter power supply |
| CN105486334A (en) * | 2015-12-01 | 2016-04-13 | 常州大学 | Quick vibrating-wire sensor frequency measurement device |
| CN106679703A (en) * | 2017-02-24 | 2017-05-17 | 河北稳控科技有限公司 | Data reading device of vibrating wire sensor and working method of data reading device |
| CN107462341A (en) * | 2017-07-31 | 2017-12-12 | 成都众邦凯测科技有限公司 | A kind of jamproof vibratory string acquisition system |
| CN107525540A (en) * | 2017-07-31 | 2017-12-29 | 成都众邦凯测科技有限公司 | A kind of vibratory string acquisition system of intelligent constant-temperature |
| CN108346275A (en) * | 2018-05-11 | 2018-07-31 | 东华理工大学 | A kind of vibrating string type sensor synthesis reading survey device based on 4G networks |
| CN109060005A (en) * | 2018-06-28 | 2018-12-21 | 广州大铁锐威科技有限公司 | A kind of intelligent acquisition system for building structure safety |
| CN109506716A (en) * | 2018-12-25 | 2019-03-22 | 岩联(武汉)科技有限公司 | A kind of type vibration wire acquisition terminal and its excitation frequency range acquisition method |
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| CN104154987A (en) * | 2014-07-10 | 2014-11-19 | 山东大学 | Vibration wire type sensor reader measuring meter |
| CN104154987B (en) * | 2014-07-10 | 2017-01-04 | 山东大学 | A kind of vibrating string type sensor plate reading |
| CN104764482A (en) * | 2015-04-14 | 2015-07-08 | 上海同磊土木工程技术有限公司 | Multifunctional full-automatic acquisition instrument with vibration wire sensors |
| CN105069894A (en) * | 2015-05-13 | 2015-11-18 | 恒银金融科技有限公司 | Hall-type detection device used for detecting thickness of paper money |
| CN105115590A (en) * | 2015-08-28 | 2015-12-02 | 苏州市博得立电源科技有限公司 | Environmental noise measuring instrument based on sine wave inverter power supply |
| CN105486334A (en) * | 2015-12-01 | 2016-04-13 | 常州大学 | Quick vibrating-wire sensor frequency measurement device |
| CN106679703A (en) * | 2017-02-24 | 2017-05-17 | 河北稳控科技有限公司 | Data reading device of vibrating wire sensor and working method of data reading device |
| CN107462341A (en) * | 2017-07-31 | 2017-12-12 | 成都众邦凯测科技有限公司 | A kind of jamproof vibratory string acquisition system |
| CN107525540A (en) * | 2017-07-31 | 2017-12-29 | 成都众邦凯测科技有限公司 | A kind of vibratory string acquisition system of intelligent constant-temperature |
| CN108346275A (en) * | 2018-05-11 | 2018-07-31 | 东华理工大学 | A kind of vibrating string type sensor synthesis reading survey device based on 4G networks |
| CN109060005A (en) * | 2018-06-28 | 2018-12-21 | 广州大铁锐威科技有限公司 | A kind of intelligent acquisition system for building structure safety |
| CN109060005B (en) * | 2018-06-28 | 2021-03-05 | 广州大铁锐威科技有限公司 | Intelligent acquisition system for large building structure safety |
| CN109506716A (en) * | 2018-12-25 | 2019-03-22 | 岩联(武汉)科技有限公司 | A kind of type vibration wire acquisition terminal and its excitation frequency range acquisition method |
| CN109506716B (en) * | 2018-12-25 | 2021-03-19 | 岩联(武汉)科技有限公司 | Vibrating wire type acquisition terminal and excitation frequency band acquisition method thereof |
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