CN103823390A - Portable vibrating-wire data acquisition system based on single lithium battery power supply - Google Patents
Portable vibrating-wire data acquisition system based on single lithium battery power supply Download PDFInfo
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- CN103823390A CN103823390A CN201310028622.0A CN201310028622A CN103823390A CN 103823390 A CN103823390 A CN 103823390A CN 201310028622 A CN201310028622 A CN 201310028622A CN 103823390 A CN103823390 A CN 103823390A
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Abstract
The invention discloses a portable vibrating-wire data acquisition system based on single lithium battery power supply. The portable vibrating-wire data acquisition system comprises expansion modules, multipath modules, measurement control modules, and central control equipment equipped with acquisition analysis software. The expansion modules, the multipath modules, the measurement control modules, and the central control equipment are sequentially connected through cables. The expansion modules are connected with a plurality of vibrating-wire sensors; the multipath modules are connected with the plurality of expansion modules; the measurement control modules are connected with the plurality of multipath modules; and the central control equipment is connected with the plurality of measurement control modules. The vibrating-wire sensors, the expansion modules, the multipath modules and the measurement control modules are respectively provided with a power interface and are in power connection with a single lithium battery. The single lithium battery is utilized to supply power, so that the body noise and the power consumption of the system are allowed to be reduced to the lowest, the signal to noise ratio of the system is greatly improved, and the pickup capability for weak signals is improved.
Description
Technical field
The present invention relates to a kind of sensor acquisition system, be specifically related to a kind of portable vibratory string data acquisition system (DAS) for engineering structure safety monitoring.
Background technology
Rational structure and carrying design are the basic guarantees of engineering structure safety, especially for large bridge, tunnel, dam etc., due to its complex structure, impact of various external conditions and construction quality etc., cause people all can not to defend with doing sth. in advance by Accurate Prediction a lot of X factors, the pre-alerting ability of the safety case of the structure only comprehensively improving by advanced automatic monitoring system in this case.
For a long time, people for the detection of the many kinds of parameters of Damage Structure safety always take manual detection method as main.And be generally regularly to detect, or even detect again in the time there is great security situation, cause the potential safety hazard of a lot of engineering structures not find in time, the people's the security of the lives and property has been caused to great threat.Therefore, this traditional detection method has been unsuitable for the growth requirement in epoch.
Vibrating string type sensor belongs to frequency type sensor, it is simple in structure, sturdy and durable, antijamming capability is strong, be output as frequency signal, be convenient to and microcomputer interface, there is general resonant transducer, be widely used in water conservancy, water power, railway, traffic, mine, oil, civil construction thing and ground inner structure.
Utilizing vibrating string type sensor measure physical quantities is to change with steel wire tension based on its string wire vibration frequency, output be frequency signal, there is antijamming capability strong, cable is required low, be conducive to transmission and the feature of remote measurement.Therefore, can obtain ideal measurement effect.
At present, portable vibrating wire acquirer equipment all adopts and inner single supply is converted to dual power supply by DCDC, then when carrying out DCDC conversion, has increased the local noise of system, and the less vibratory string signal of amplitude is unfavorable for gathering.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of this bulk noise low, can improve system signal noise ratio, thereby can strengthen feeble signal pick-up capability based on the battery-powered portable vibratory string data acquisition system (DAS) of single-lithium-battery.
For achieving the above object, the technical solution used in the present invention is:
Based on the battery-powered portable vibratory string data acquisition system (DAS) of single-lithium-battery, comprise expansion module, multichannel module, measure control module and the central control equipment of collection analysis software is installed; Described expansion module, multichannel module, measurement control module are connected by cable successively with central control equipment; On described expansion module, be connected with several vibrating string type sensors, in described multichannel module, be connected with several expansion modules, in described measurement control module, be connected with several multichannel modules, on described central control equipment, be connected with several and measure control module, described vibrating string type sensor, expansion module, multichannel module, measurement control module are equipped with power interface and are connected with single-lithium-battery pond power supply.
Above-mentioned central control equipment is micro computer module or terminal computer.
Above-mentioned vibrating string type sensor is two core shielding line vibrating string type sensors or four-core shielding line vibrating string type sensor.
Compared with prior art, beneficial effect of the present invention is:
1, the present invention adopts the power supply of single-lithium-battery pond, inner without adopting DCDC converter that power supply is converted to bipolar power supply, employing can single power supply operational amplifier, make this bulk noise of system be down to minimum with power consumption, improve greatly system signal noise ratio, strengthened the pick-up capability to feeble signal.
2, the present invention adopts Modular Structure Design, and in system, each sensor is relatively independent, and module is connected the communication interface passing through with intermodule.Each module load balancing, processing speed is fast, operational efficiency is high, can under various mal-conditions, work.
3, the present invention is applicable to engineering structure key position to carry out full-automatic Real-time Collection, processing, analysis; Can carry out safety case assessment by collection analysis software, and Real-time Monitoring Data, early warning situation and assessment report can be provided.
Embodiment
A kind of based on the battery-powered portable vibratory string data acquisition system (DAS) of single-lithium-battery, comprise expansion module, multichannel module, measure control module and the central control equipment of collection analysis software is installed; Described expansion module, multichannel module, measurement control module are connected by cable successively with central control equipment; On described expansion module, be connected with several vibrating string type sensors, in described multichannel module, be connected with several expansion modules, in described measurement control module, be connected with several multichannel modules, on described central control equipment, be connected with several and measure control module, described vibrating string type sensor, expansion module, multichannel module, measurement control module are equipped with power interface and are connected with single-lithium-battery pond power supply.Above-mentioned central control equipment is micro computer module or terminal computer.Above-mentioned vibrating string type sensor is two core shielding line vibrating string type sensors or four-core shielding line vibrating string type sensor.
The present invention is in the fully differential of the employing foremost input mode of data link, outside common-mode noise can be suppressed greatly, again by the frequency overlapped-resistable filter on rank, can be by the squelch of HFS, ADC adopts 16, system signal noise ratio reaches 90DB left and right, through actual test, the body noise density frequency spectrum of system is 2.5uV/Hz (1/2), amplitude spectrum maximal value 10uV, as long as signal amplitude is greater than 10 times of amplitude spectrum maximal values, namely 0.1mV, just signal can be picked up out easily, and in reality, faint vibratory string signal amplitude is also on 0.1mV, thereby solve the problem that gathers faint vibratory string signal.
Claims (3)
1. based on the battery-powered portable vibratory string data acquisition system (DAS) of single-lithium-battery, comprise expansion module, multichannel module, measure control module and the central control equipment of collection analysis software is installed; Described expansion module, multichannel module, measurement control module are connected by cable successively with central control equipment; On described expansion module, be connected with several vibrating string type sensors, in described multichannel module, be connected with several expansion modules, in described measurement control module, be connected with several multichannel modules, on described central control equipment, be connected with several and measure control module, it is characterized in that: described vibrating string type sensor, expansion module, multichannel module, measurement control module are equipped with power interface and are connected with single-lithium-battery pond power supply.
2. according to claim 1 based on the battery-powered portable vibratory string data acquisition system (DAS) of single-lithium-battery, it is characterized in that: described central control equipment is micro computer module or terminal computer.
3. according to claim 1 based on the battery-powered portable vibratory string data acquisition system (DAS) of single-lithium-battery, it is characterized in that: described vibrating string type sensor is two core shielding line vibrating string type sensors or four-core shielding line vibrating string type sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310028622.0A CN103823390A (en) | 2013-01-25 | 2013-01-25 | Portable vibrating-wire data acquisition system based on single lithium battery power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310028622.0A CN103823390A (en) | 2013-01-25 | 2013-01-25 | Portable vibrating-wire data acquisition system based on single lithium battery power supply |
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| CN103823390A true CN103823390A (en) | 2014-05-28 |
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| CN201310028622.0A Pending CN103823390A (en) | 2013-01-25 | 2013-01-25 | Portable vibrating-wire data acquisition system based on single lithium battery power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106781382A (en) * | 2016-12-20 | 2017-05-31 | 江西飞尚科技有限公司 | A kind of bracing members stress acquisition module |
| CN108534806A (en) * | 2017-03-03 | 2018-09-14 | 杨毅 | Resonant chord sensor and secondly core wire duplex switching method in the calibration of two core cables |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202230595U (en) * | 2011-10-21 | 2012-05-23 | 广东省建筑科学研究院 | Multichannel data acquisition system used for vibrating wire transducers |
| CN202255617U (en) * | 2011-09-16 | 2012-05-30 | 重庆恩菲斯软件有限公司 | Vibrating wire type data acquisition device |
-
2013
- 2013-01-25 CN CN201310028622.0A patent/CN103823390A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202255617U (en) * | 2011-09-16 | 2012-05-30 | 重庆恩菲斯软件有限公司 | Vibrating wire type data acquisition device |
| CN202230595U (en) * | 2011-10-21 | 2012-05-23 | 广东省建筑科学研究院 | Multichannel data acquisition system used for vibrating wire transducers |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106781382A (en) * | 2016-12-20 | 2017-05-31 | 江西飞尚科技有限公司 | A kind of bracing members stress acquisition module |
| CN108534806A (en) * | 2017-03-03 | 2018-09-14 | 杨毅 | Resonant chord sensor and secondly core wire duplex switching method in the calibration of two core cables |
| CN108534806B (en) * | 2017-03-03 | 2024-02-20 | 杨毅 | Two-core system cable calibration inner Chu Zhenxian sensor and two-core wire duplex switching method thereof |
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Application publication date: 20140528 |