CN204405083U - For the data collector of vibrating string type sensor - Google Patents
For the data collector of vibrating string type sensor Download PDFInfo
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- CN204405083U CN204405083U CN201520111340.1U CN201520111340U CN204405083U CN 204405083 U CN204405083 U CN 204405083U CN 201520111340 U CN201520111340 U CN 201520111340U CN 204405083 U CN204405083 U CN 204405083U
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Abstract
The utility model provides a kind of data collector for vibrating string type sensor, and described device comprises: controller; To be electrically connected with described controller and for providing the energizing circuit of low voltage excitation signal for vibrating string type sensor; To be electrically connected with described controller and for the input modulate circuit of the frequency signal that detects and nurse one's health vibrating string type sensor; For multiple passages that energizing circuit is connected from different vibrating string type sensor with both input modulate circuits; Be electrically connected with described controller and the driving circuit that cuts off of connected sum for controlling described multiple passage under the control of described controller.Adopt the utility model, data acquisition can not only be carried out for multiple vibrating string type sensor, improve collecting efficiency, system power dissipation and the damage to vibrating string type sensor can also be reduced.
Description
Technical field
The utility model relates to sensor field, more specifically, relates to a kind of data collector for vibrating string type sensor.
Background technology
Along with the widespread use of vibrating wire sensor, to the acquisition precision of vibrating wire sensor, degree of stability, reliability and the requirement that automatically gathers also more and more higher.
In order to measure the natural frequency of vibratory string, must manage to excite vibratory string to vibrate, and in order to ensure that the reliable starting of oscillation of sensor is to ensure acquisition precision, the mode adopting raising exciting voltage in the prior art more.There is following drawback in this mode: exciting voltage is higher, larger to the damage of sensor, easily causes sensor fatigue, reduces serviceable life; Increasing apparatus relative complex, is unfavorable for that equipment simplifies; Exciting voltage is higher, and system power dissipation is larger, and the harvester of high power consumption has larger limitation in application.Such as, existing online acquisition technique, its exciting voltage and entire system power consumption all higher, need civil power supplement electricity or periodic replacement battery, bring significant limitation to the application of equipment.
In addition, current published harvester/acquisition technique can only complete the data acquisition to a sensor in a gatherer process, such as existing hand-held readout instrument.This greatly reduces the data acquisition efficiency for vibrating string type sensor.
Summary of the invention
The utility model provides a kind of data collector for vibrating string type sensor, can not only carry out data acquisition to multiple vibrating string type sensor, improves data acquisition efficiency, can also reduce overall power and the damage to vibrating string type sensor.
On the one hand, the utility model embodiment provides a kind of data collector for vibrating string type sensor, comprising:
Controller;
To be electrically connected with described controller and for providing the energizing circuit of low voltage excitation signal for vibrating string type sensor;
To be electrically connected with described controller and for the input modulate circuit of the frequency signal that detects and nurse one's health vibrating string type sensor;
For multiple passages that energizing circuit is connected from different vibrating string type sensor with both input modulate circuits;
Be electrically connected with described controller and the driving circuit that cuts off of connected sum for controlling described multiple passage under the control of described controller.
Alternatively, in a kind of implementation of the present embodiment, described device also comprises: be electrically connected with described controller and carry out the data transmission interface of data transmission for described controller and third party device.
Alternatively, in the another kind of implementation of the present embodiment, described device also comprises: be electrically connected with described driving circuit and connect, and isolate for both the signal isolation between different vibrating string type sensor and described energizing circuit and input modulate circuit and the signal between each vibrating string type sensor, and, for being communicated with or cutting off passage bridge and the signal isolation circuit of both described energizing circuit and input modulate circuit and the connection between vibrating string type sensor under the driving of described driving circuit.
Alternatively, in the various implementations of the present embodiment, described vibrating string type sensor comprises: single coil vibrating sensor and twin coil vibrating string type sensor.
The utility model compared with prior art tool has the following advantages:
1) carry out for the technology of data acquisition relative to existing employing boosting mode, can the structure of reduced data harvester.
2) by providing low voltage excitation signal for vibrating string type sensor, system power dissipation and the damage to vibrating string type sensor is reduced.On the basis reducing power consumption, the application of installation being conducive to the utility model to provide, in various different scene, avoids the limitation of the application aspect brought because of power problems.
3) data acquisition can be carried out to multiple vibrating string type sensor by described multiple passage, improve data acquisition efficiency; Drive passage bridge and signal isolation circuit by driving circuit, the connected sum that can control each passage neatly cuts off, thus carries out data acquisition to any vibrating string type sensor pointedly.
4) excite vibrating string type sensor with adopting the low-voltage swept-frequency signal frequency-division section of different frequency range, the natural frequency of vibrating string type sensor can be determined quickly and accurately.
5) by adopting monocycle acquisition method, the quick pick-up of signal can be realized, and the device that the utility model is provided not being only applicable to the signals collecting of single coil vibrating sensor, being also applicable to the signals collecting of twin coil vibrating string type sensor.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the data collector according to embodiment 1 of the present utility model;
Fig. 2 is the schematic diagram of the data collector according to embodiment 2 of the present utility model;
Fig. 3 A is the schematic diagram of the data collector according to embodiment 3 of the present utility model;
Fig. 3 B is the schematic diagram of the data collector according to a kind of embodiment of the present utility model;
Fig. 4 is a kind of schematic flow sheet of collecting method;
Fig. 5 A is a kind of schematic flow sheet of collecting method;
Fig. 5 B is the schematic diagram of the signal that a kind of swept-frequency signal and controller collect;
Fig. 6 is a kind of schematic flow sheet of collecting method.
Embodiment
Below in conjunction with the drawings and specific embodiments, various aspects of the present utility model are described in detail.Wherein, well-known circuit, connected mode, communication mode or data handling procedure do not illustrate or do not elaborate.Further, described feature, framework or function can combine by any way in one or more embodiments.It will be appreciated by those skilled in the art that following various embodiments are only for illustrating, but not for limiting protection domain of the present utility model.Can also easy understand, the module in each embodiment described herein and shown in the drawings or unit or step can be undertaken combining and designing by various different configuration.
[embodiment 1]
Fig. 1 is the schematic diagram of the data collector according to embodiment 1 of the present utility model.Data collector 1 is for carrying out data acquisition for vibrating string type sensor.With reference to Fig. 1, data collector 1 comprises controller 10, energizing circuit 20, input modulate circuit 30, driving circuit 40 and multiple passage, is described respectively below.
Controller 10 is for carrying out the process of the aspects such as data processing, program storage and execution.Energizing circuit 20 and input modulate circuit 30 are all electrically connected with controller 10.Wherein, energizing circuit 20 is for providing low voltage excitation signal for vibrating string type sensor, and low voltage excitation signal comprises low-voltage swept-frequency signal and meets the low voltage excitation signal of stimulating frequency.Input modulate circuit 30 is for detecting and nurse one's health the frequency signal of vibrating string type sensor, such as, detect the frequency signal that vibrating string type sensor produces under low voltage excitation signal function, and the frequency signal detected is converted to the accessible form of controller 10.
It should be noted that, " the low voltage excitation signal " mentioned in the present embodiment refers to that the driving voltage of pumping signal is low-voltage, and wherein, " low-voltage " is preferably about 5V or 5V, such as, and 3 ~ 8V (such as, 4V, 6V, 7V) etc.Certainly, if do not consider the problem in serviceable life of power problems and sensor, higher driving voltage (such as, higher than 8V) also can be adopted in other embodiments.In addition, lower voltage (such as, lower than 3V) can also be adopted in other embodiments.
In the present embodiment, data collector 1 has the multiple passages for being connected from different vibrating string type sensor with both input modulate circuits 30 by energizing circuit 20.As shown in Figure 1, energizing circuit 20 and input modulate circuit 30 and drive coil connect and compose passage.The driving circuit 40 be electrically connected with controller 10, then the connected sum for controlling described multiple passage under the control of controller 10 cuts off.
That is, the data collector 1 in the present embodiment can carry out data acquisition for multiple vibrating string type sensor, and is not limited to single vibrating string type sensor.To be described hereinafter about concrete collecting method.
The data collector 1 adopting the present embodiment to provide, on the one hand, provides low voltage excitation signal by energizing circuit 20 for vibrating string type sensor, reduces system power dissipation and the damage to vibrating string type sensor; On the other hand, data acquisition (such as, one by one carrying out data acquisition) can be carried out to multiple vibrating string type sensor by described multiple passage, without the need to single vibrating string type sensor ground installation and removal, improve data acquisition efficiency.
[embodiment 2]
Fig. 2 is the schematic diagram of the data collector according to embodiment 2 of the present utility model.Data collector 2 is for carrying out data acquisition for vibrating string type sensor.With reference to Fig. 2, data collector 2, except comprising controller 10, energizing circuit 20, input modulate circuit 30, driving circuit 40 and multiple passage, also comprises passage bridge and signal isolation circuit 50.
Passage bridge is electrically connected with driving circuit 40 with signal isolation circuit 50, isolate for both the signal isolation between different vibrating string type sensor and energizing circuit 20 and input modulate circuit 30 and the signal between each vibrating string type sensor, and, for being communicated with under the driving of driving circuit 40 or cutting off both energizing circuit 20 and input modulate circuit 30 and the connection between vibrating string type sensor.In the present embodiment, passage bridge and signal isolation circuit 50 can regard a part for described multiple passage as, for controlling connection and the signal transmission form of each passage.
About the control to described multiple passage, more specifically, controller 10 acts on driving circuit 40 according to internal processes instruction sendaisle gating signal, and driving circuit 40 drives passage bridge and signal isolation circuit 50, thus realizes the connection of each passage and the control of cut-out.
The data collector 2 that the present embodiment provides, the connected sum driving passage bridge and signal isolation circuit 50 can control each passage neatly by driving circuit 40 cuts off, thus carries out data acquisition to any vibrating string type sensor pointedly.
[embodiment 3]
Fig. 3 A is the schematic diagram of the data collector according to embodiment 3 of the present utility model, and data collector 3 is for carrying out data acquisition for vibrating string type sensor.With reference to Fig. 3 A, data collector 3, except comprising controller 10, energizing circuit 20, input modulate circuit 30, driving circuit 40 and multiple passage, also comprises data transmission interface 60.
Data transmission interface 60 is electrically connected with controller 10, carries out data transmission for controller 10 and third party device.Such as, the data that self preserves are sent to outer harvesting portion by data transmission interface 60 by controller 10, and third party device writes program etc. for carrying acquisition strategies by data transmission structure 60 to controller 10.
In order to reduce power consumption, data collector 3, after by data transmission interface 60 data collected being transferred to third party device, automatically can entering dormant state and wait for the acquisition next time of third party device.
The data collector 3 that the present embodiment provides by data transmission interface 60 and PERCOM peripheral communication, can be convenient to those skilled in the art and data collector 3 be applied to different scene neatly, applied range.
Except above-described embodiment, in another kind of embodiment of the present utility model, such as shown in Fig. 3 B, data collector can have controller 10, energizing circuit 20, input modulate circuit 30, driving circuit 40, multiple passage, passage bridge and signal isolation circuit 50 and data transmission interface 60 simultaneously.Explanation for each several part refers to related description above, does not repeat herein.
In various device embodiment of the present utility model, the single coil vibrating sensor of vibrating string type sensor can be drive coil and signal pickup coil be same coil also can be twin coil vibrating string type sensor.Usually, the workflow of twin coil vibrating string type sensor is as follows: pumping signal inputs from drive coil, the output signal of sensor, from the pickup of another one signal-obtaining coil, delivers to again the energy that drive coil goes to supplement vibration after the induced signal of signal pickup coil is exaggerated.Wherein, the induced signal part of signal pickup coil pickup amplified by special amplifying circuit after for encouraging and the energy of supplementary Chord vibration, another part realizes the collection of signal after then needing input and modulate circuit process process.And the data collector that the present embodiment provides is when adopting monocycle acquisition method, the quick pick-up of signal can be realized, and with pickoff signals Direct driver exiting signal generating circuit and then the drive coil acting on twin coil vibrating wire sensor, realize supplementing the energy that vibratory string vibrates, thus by the signals collecting of simple circuit realiration to twin coil vibrating string type sensor.
In various device embodiment of the present utility model, data collector can gather the frequency signal that branched vibrating string type sensor produces, therefore, when needing to be arranged relatively many sensors in complexity by the diverse location of the associated component of geodesic structure, or, when needing when being obtained the more multiparameter based on different vibrating wire sensor by geodesic structure, or, when utilize vibrating wire sensor Output rusults carry out analytical calculation need other auxiliary parameter time, the device that the utility model provides can provide total solution with minimum cost.
[collecting method 1]
Fig. 4 is a kind of schematic flow sheet of collecting method, and the data collector that described method specifically provides based on the utility model embodiment carries out the method for data acquisition to vibrating string type sensor, and with reference to Fig. 4, described method comprises:
400: controller by energizing circuit for the passage being communicated with vibrating string type sensor provides low voltage excitation signal.
Alternatively, in a kind of implementation of the present embodiment, data collector detects the connection situation of each passage after power-up, which namely detects/and which channel connection has vibrating string type sensor, and provides low voltage excitation signal to the passage being communicated with vibrating string type sensor.Such as, passage more specifically, one by one for being communicated with vibrating string type sensor provides low voltage excitation signal.
Alternatively, in a kind of implementation of the present embodiment, low voltage excitation signal comprises low-voltage swept-frequency signal and meets predetermined natural frequency (namely, using predetermined natural frequency as stimulating frequency) low-voltage frequently pumping signal surely, hereafter will be described in detail at this point.
402: the frequency signal that input modulate circuit detects and conditioning vibrating string type sensor produces under low voltage excitation signal function.
404: the frequency signal after the conditioning of controller collection signal examine and debug circuit also carries out data processing based on the frequency signal collected.Such as, preserve the frequency signal after the conditioning of input modulate circuit, based on the frequency signal after conditioning carry out calculating determine to encourage next time stimulating frequency, carry out calculating the natural frequency etc. determining vibrating string type sensor based on the frequency signal after conditioning.
Adopting collecting method 1, on the one hand, by adopting low voltage excitation signal to carry out data acquisition, while reducing system power dissipation, reducing the damage for vibrating string type sensor; On the other hand, data acquisition can be carried out to multiple vibrating string type sensor, improve data acquisition efficiency.
[collecting method 2]
Fig. 5 A is a kind of schematic flow sheet of collecting method, and the data collector that described method specifically provides based on the utility model embodiment carries out the method for data acquisition to vibrating string type sensor, and with reference to Fig. 5 A, described method comprises:
500: controller sends the low-voltage swept-frequency signal of different frequency range successively to the passage being communicated with vibrating string type sensor by energizing circuit.That is, the low-voltage swept-frequency signal in the present embodiment can be divided into multiple frequency range, for arbitrary vibrating string type sensor, by frequency range, the low-voltage swept-frequency signal of different frequency range is supplied to this vibrating string type sensor successively.
502: the frequency signal that input modulate circuit detects and conditioning vibrating string type sensor produces under the effect of the swept-frequency signal of each frequency range.Signal after conditioning is sent to controller by input modulate circuit.
504: controller carries out data processing based on the frequency signal collected, such as, carry out the data processing for the purpose of the natural frequency determining vibrating string type sensor.
Specifically, controller adopts monocyclic method to gather the multiple output frequency value of vibrating string type sensor in each frequency range, and according to the multiple output frequency value of vibrating string type sensor in each frequency range, determines the natural frequency of vibrating string type sensor.Such as, controller collection also records totally 30 output frequency value (1 corresponding 10 output frequency value of frequency range) that vibrating string type sensor corresponds to 3 frequency ranges, the vibrational state of vibrating string type sensor in each frequency range is judged according to the situation of change of the output frequency value of each frequency range, choose vibrational state optimum (namely, closest to resonance state) frequency range in output frequency value carry out calculating (such as, averaging) and obtain natural frequency.The natural frequency of this vibrating string type sensor preserved by controller, and can using the stimulating frequency of the current natural frequency determined as next this vibrating string type sensor of exciting.
Wherein, described monocyclic method refers to the rise and fall externally down trigger function utilizing high-speed counter to coordinate single-chip microcomputer, accurately measures the time between two rising edges or two negative edges, by calculating the frequency of measured signal.
Exemplarily, the schematic diagram of signal that collects of a kind of swept-frequency signal and controller as shown in Figure 5 B.
Collecting method 2 can be understood as a kind of specific implementation of collecting method 1, and wherein, the result that controller carries out data processing is the natural frequency of each vibrating string type sensor, also can as the stimulating frequency exciting each vibrating string type sensor next time.
Adopt collecting method 2, low-voltage swept-frequency signal is sent by frequency-division section, power consumption can not only be saved, reduce damage to vibrating string type sensor, also help controller and follow the trail of the frequency change of vibrating string type sensor in swept frequency excitation process and accurately identify the resonance state of vibrating string type sensor.While accurately determining natural frequency, for the follow-up vibrating string type sensor of starting of oscillation more reliably provides frequency reference.
[collecting method 3]
Fig. 6 is a kind of schematic flow sheet of collecting method, and the data collector that described method specifically provides based on the utility model embodiment carries out the method for data acquisition to vibrating string type sensor, and with reference to Fig. 6, described method comprises:
600: controller sends low-voltage frequently pumping signal surely by energizing circuit to the passage being communicated with vibrating string type sensor, this low-voltage surely frequently the frequency of pumping signal be the natural frequency of predetermined described vibrating string type sensor.
Alternatively, in a kind of implementation of the present embodiment, described natural frequency can be determined by embodiment 5.
602: the frequency signal that input modulate circuit detects and conditioning vibrating string type sensor produces under low-voltage surely pumping signal effect frequently.
604: the frequency signal after the conditioning of controller collection signal examine and debug circuit also carries out data processing based on the frequency signal collected.
More specifically, controller adopts monocyclic method to gather the output frequency value of vibrating string type sensor under low-voltage surely pumping signal effect frequently, and judges according to the output frequency value collected.If the deviation of the output frequency value collected and described natural frequency does not meet pre-conditioned, or, if the vibrational state that this output frequency value reflects does not reach resonance state, then illustrate that vibrating string type sensor there occurs change.
Such as, when the output frequency value collected is one, if it exceedes preset range with the deviation of the natural frequency formerly determined, then determine that vibrating string type sensor there occurs change.Again such as, when the output frequency value collected is multiple, if wherein exceed setting the output frequency value of number and the deviation of described natural frequency exceed preset range, or, if the mean value of described multiple output frequency value and the deviation of described natural frequency exceed preset range, then determine that vibrating string type sensor there occurs change.Again such as, when the output frequency value collected is multiple, according to the vibrational state of the plurality of output frequency value determination vibrating string type sensor, if do not reach resonance state, then determine that vibrating string type sensor there occurs change, if reach resonance state, then determine that vibrating string type sensor does not change; Deng.
It should be noted that, in the present embodiment, the vibrational state of vibrating string type sensor reaches resonance state, does not represent that the vibrational state of vibrating string type sensor must be completely the same with theoretic resonance state, but allows reasonably deviation.
When determining that vibrating string type sensor changes, controller sends the low-voltage swept-frequency signal of the frequency range corresponding to described natural frequency to the passage being communicated with vibrating string type sensor by energizing circuit, to redefine the natural frequency of vibrating string type sensor.Why transmission corresponds to the low-voltage swept-frequency signal of the frequency range of described natural frequency, be the consideration near natural frequency after changing based on the vibrating string type sensor natural frequency mostly before change, be conducive to like this determining the natural frequency after changing quickly.Certainly, in other embodiments, also can as in embodiment 5, send the low-voltage swept-frequency signal of frequency-division section successively and carry out subsequent treatment.
Alternatively, in a kind of implementation of the present embodiment, can using the natural frequency determined by process 604 stimulating frequency as next exciting.
Adopt collecting method 3, the natural frequency of vibrating string type sensor can be measured accurately and efficiently.
More than in conjunction with embodiment, the utility model is illustrated; these embodiments are only exemplary; can not limit protection domain of the present utility model with this, those skilled in the art can carry out various amendment, change or replacement under the prerequisite not departing from the utility model essence.Therefore, the various equivalent variations done according to the utility model, still belong to the scope that the utility model is contained.
Claims (4)
1. for a data collector for vibrating string type sensor, it is characterized in that, described device comprises:
Controller;
To be electrically connected with described controller and for providing the energizing circuit of low voltage excitation signal for vibrating string type sensor;
To be electrically connected with described controller and for the input modulate circuit of the frequency signal that detects and nurse one's health vibrating string type sensor;
For multiple passages that energizing circuit is connected from different vibrating string type sensor with both input modulate circuits;
Be electrically connected with described controller and the driving circuit that cuts off of connected sum for controlling described multiple passage under the control of described controller.
2. device as claimed in claim 1, it is characterized in that, described device also comprises:
Be electrically connected with described controller and carry out the data transmission interface of data transmission for described controller and third party device.
3. device as claimed in claim 1, it is characterized in that, described device also comprises:
Be electrically connected with described driving circuit, and isolate for both the signal isolation between different vibrating string type sensor and described energizing circuit and input modulate circuit and the signal between each vibrating string type sensor, and, for being communicated with or cutting off passage bridge and the signal isolation circuit of both described energizing circuit and input modulate circuit and the connection between vibrating string type sensor under the driving of described driving circuit.
4. the device according to any one of claim 1-3, is characterized in that, described vibrating string type sensor comprises: single coil vibrating sensor and twin coil vibrating string type sensor.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987711A (en) * | 2015-02-15 | 2016-10-05 | 北京天江源科技有限公司 | Data acquisition method and apparatus for vibrating-wire sensor |
| CN106092150A (en) * | 2016-06-01 | 2016-11-09 | 同济大学 | The location information acquisition method of rotary transformer, system and electronic equipment |
| 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 |
| CN109425424A (en) * | 2017-08-30 | 2019-03-05 | Vega格里沙贝两合公司 | The method for operating limit sensors |
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2015
- 2015-02-15 CN CN201520111340.1U patent/CN204405083U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987711A (en) * | 2015-02-15 | 2016-10-05 | 北京天江源科技有限公司 | Data acquisition method and apparatus for vibrating-wire sensor |
| CN105987711B (en) * | 2015-02-15 | 2018-07-13 | 北京天江源科技有限公司 | For the collecting method and device of vibrating string type sensor |
| CN106092150A (en) * | 2016-06-01 | 2016-11-09 | 同济大学 | The location information acquisition method of rotary transformer, system and electronic equipment |
| CN106092150B (en) * | 2016-06-01 | 2018-07-03 | 同济大学 | Location information acquisition method, system and the electronic equipment of rotary transformer |
| 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 |
| CN109425424A (en) * | 2017-08-30 | 2019-03-05 | Vega格里沙贝两合公司 | The method for operating limit sensors |
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