CN207937801U - A kind of experiment detection device of acceleration transducer - Google Patents
A kind of experiment detection device of acceleration transducer Download PDFInfo
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- CN207937801U CN207937801U CN201721645666.8U CN201721645666U CN207937801U CN 207937801 U CN207937801 U CN 207937801U CN 201721645666 U CN201721645666 U CN 201721645666U CN 207937801 U CN207937801 U CN 207937801U
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- acceleration transducer
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Abstract
The utility model discloses a kind of experiment detection device of acceleration transducer, described device includes：Analog signal output unit, isolating converter, ADC collecting units, FPGA central locations, USB communication units；Wherein, analog signal output unit, ADC collecting units, USB communication units are connect with FPGA central locations, and analog signal output unit is connect with isolating converter, and isolating converter is connect with ADC collecting units；It realizes and measures more accurate, the performance of no longer vibrated rack and calibration sensor influences that volume is lighter and handier, and structure is simpler, and portable performance is good, avoids the technique effect for the human error that traditional artificial reading generates.
Description
Technical field
The utility model is related to nuclear power station seismic instrument fields, and in particular, to a kind of experiment inspection of acceleration transducer
Survey device.
Background technology
The serial acceleration sensings of the AC 63/73 of new nuclear power station earthquake instrument system generally use GEOSIG companies at present
Device, the acceleration transducer working frequency is in 200Hz hereinafter, low-frequency vibration rack is needed to be demarcated.Nuclear power station needs regular
The qualitative detection of working condition, and traditional low frequency vibration are carried out to each node acceleration sensor in earthquake instrument system
Rack can not be carried to onsite application because build is larger, and small vibrating bench frame apparatus is although easy to carry, but precision is inadequate,
So this kind of test method is not suitable for seismic instrument system of nuclear power plant scene and is popularized.
Traditional use vibration rack carries out the Comparability test of acceleration transducer with calibration sensor, and principle is will be to be checked
The acceleration transducer of survey is fixed to above vibration rack, and calibrated sensor is fastened to the surface of acceleration transducer,
After vibrating the vibration that rack generates certain frequency, by comparing the output acceleration value of calibration sensor and acceleration transducer,
To carry out checking the calibration to acceleration transducer, obtains its amplitude-versus-frequency curve etc., this method has the following disadvantages：
The shake table frame body product of low frequency is larger, is unfavorable for carrying, and onsite application is relatively complicated, and vibration rack output is unstable
It is fixed, it is difficult to obtain stable acceleration value；If wanting to get stable acceleration value, also need at further digital filtering
Reason；
The amplitude-frequency response of acceleration transducer in the frequency response section of calibrated sensor and earthquake instrument system
Section is not often consistent, and the section so as to cause calibration sensor work is undesirable, reduces the measurement quality of experiment itself, shadow
Ring measurement result etc.；
Measurement process is discrete distribution, and the acceleration value that vibration rack generates is limited and discrete, tests process
It is typically only capable to obtain limited test data point, it is difficult to obtain the amplitude-frequency response of complete acceleration transducer.
Utility model content
The utility model provides a kind of experiment detection device of acceleration transducer, solves existing deficiency, realizes
Measure more accurate, the performance of no longer vibrated rack and calibration sensor influences that volume is lighter and handier, and structure is simpler,
Portable performance is good, avoids the technique effect for the human error that traditional artificial reading generates.
What the utility model was protected is the structure and composition of device, and existing analog signal output unit, isolation is utilized to turn
Parallel operation, ADC collecting units, FPGA central locations, USB communication units these units are attached, and are then utilized in these units
Existing program is realized that the purpose of the application is to protect its structure, composition, connection relation, is not to protect its existing
Program realizes the purpose of the application by existing unit and its corresponding function.
To realize above-mentioned purpose of utility model, this application provides a kind of experiment detection device of acceleration transducer, institutes
Stating device includes：
Analog signal output unit, isolating converter, ADC collecting units, FPGA central locations, USB communication units；Its
In, analog signal output unit, ADC collecting units, USB communication units are connect with FPGA central locations, analog signal output
Unit is connect with isolating converter, and isolating converter is connect with ADC collecting units.
Further analog signal output unit is connect with acceleration transducer.USB communication units are connect with computer.Institute
It further includes lithium battery power supply unit to state device, for being powered to device.The model of analog signal output unit
DAC8531；The model ADS1255I of ADC collecting units；The model ep4ce6e22c8n of FPGA central locations；USB is communicated
The model pl2303 of unit.
Lithium battery power supply unit provides operating voltage for bottom machine equipment, work is provided for acceleration transducer AC-63/73
Make voltage, so as to the Hz noise for avoiding alternating current 220V AC power supply modes from introducing, reduces the noise level of system entirety, carry
High measurement sensitivity etc..Analog signal output unit, can according to instruction come set the output peak value of sinusoidal signal, frequency and
The parameters such as direct current biasing amount；ADC collecting units can be synchronously carried out two from signal generating unit and acceleration transducer
Road pulse signal；FPGA central locations, the signal amplitude for adjusting analog output and frequency, acquisition and storage input signal
Waveform, and data are uploaded in host computer by USB interface.
One or more technical solution provided by the present application, has at least the following technical effects or advantages：
1, more accurate, the performance influence of no longer vibrated rack and calibration sensor is measured；
2, volume is lighter and handier, and structure is simpler, and portable performance is good.
3, calculating process is all automatically performed by computer, avoids the human error that traditional artificial reading generates.
Description of the drawings
Attached drawing described herein is used for providing further understanding the utility model embodiment, constitutes the one of the application
Part does not constitute the restriction to the utility model embodiment；
Fig. 1 is the structural schematic diagram of the experiment detection device of acceleration transducer in the application.
Specific implementation mode
The utility model provides a kind of experiment detection device of acceleration transducer, solves existing deficiency, realizes
Measure more accurate, the performance of no longer vibrated rack and calibration sensor influences that volume is lighter and handier, and structure is simpler,
Portable performance is good, avoids the technique effect for the human error that traditional artificial reading generates.
In order to be more clearly understood that the above objects, features, and advantages of the utility model, below in conjunction with the accompanying drawings and have
The utility model is further described in detail in body embodiment.It should be noted that in the case where not conflicting mutually,
Feature in embodiments herein and embodiment can be combined with each other.
Many details are elaborated in the following description in order to fully understand the utility model, still, this practicality
It is novel to be implemented different from the other modes being described herein in range using other, therefore, the protection of the utility model
Range is not limited by following public specific embodiment.
According to the electronics property of the acceleration transducer AC-63/73 in earthquake instrument system, as one 0- of input
When the sinusoidal excitation signal of 10V, acceleration transducer can export corresponding sinusoidal response signal, and there are one phases for tool between the two
Difference；Constantly change the frequency of input signal, the phase difference of two paths of signals also can correspondingly change.When input/output signal
When phase difference is 90 °, the frequency of input signal is exactly the resonant frequency of acceleration transducer at this time.And far from resonant frequency
Low-frequency range under acceleration transducer export sinusoidal response line peak-to-peak value, with the output under resonant frequency sine ring
The peak-to-peak value of curve, two values is answered to can be obtained the damped coefficient and intrinsic frequency of acceleration transducer by calculating, from
And it can accurately obtain the function expression of acceleration transducer amplitude-frequency response.The cutoff frequency point of acceleration transducer,
It can also be obtained by way of constantly changing frequency input signal, setting acceleration transducer is in input frequency far from resonance
The peak-to-peak value that response wave shape is exported in the case of frequency is DC0, constantly changes external input frequency, when the signal peak value of output
When dropping to DC0/2, frequency at this time is exactly the cutoff frequency of acceleration transducer.
As shown in Figure 1, integrated mould structure type may be used in the present apparatus, each building blocks of function of slave computer is encapsulated into
In one machine die.Lithium battery power supply module therein is used to acquire analog signals generating unit, the ADC in device
The components such as unit, FPGA processor unit, isolating converter unit are powered, while to external acceleration sensing to be measured
Device provides operating voltage.Analog signal generating unit generates the sinusoidal signal of standard, is input in acceleration transducer all the way,
Another way, which is input in ADC collecting units, does phase comparison standard signal；Acceleration transducer in earthquake instrument system is usual
It is current signal output, response is current sinusoidal signal, needs isolating converter to be converted into voltage signal, then be transported to ADC
Signal acquisition is carried out in collecting unit；FPGA signal processing units control the course of work of slave computer, receive and bristle with anger under host computer
It enables, the frequency and amplitude of the waveform of control analog signal output unit output, while storing the number after the digitlization of ADC collecting units
According to value, and upload in host computer in real time.
Host computer signal analysis software obtains data by USB port, and carries out digital filtering filtering noise jamming, passes through
Both the amplitude-frequency of equally spaced sinusoidal signal converts, and calculates the parameters such as current frequency, the peak-to-peak value of two paths of signals, and calculate
Phase difference value etc..
During experiment, operating personnel can carry out the sinusoidal excitation signal of constantly regulate input by sending instructions under host computer
The parameters such as peak-to-peak value, frequency and direct current biasing amount.
Although the preferred embodiment of the utility model has been described, once a person skilled in the art knows basic
Creative concept, then additional changes and modifications may be made to these embodiments.It is wrapped so the following claims are intended to be interpreted as
It includes preferred embodiment and falls into all change and modification of the scope of the utility model.
Obviously, those skilled in the art can carry out the utility model various modification and variations without departing from this practicality
Novel spirit and scope.If in this way, these modifications and variations of the present invention belong to the utility model claims and
Within the scope of its equivalent technologies, then the utility model is also intended to include these modifications and variations.
Claims (4)
1. a kind of experiment detection device of acceleration transducer, which is characterized in that described device includes：
Analog signal output unit, isolating converter, ADC collecting units, FPGA central locations, USB communication units；Wherein, mould
Quasi- signal output unit, ADC collecting units, USB communication units connects with FPGA central locations, analog signal output unit and
Isolating converter connects, and isolating converter is connect with ADC collecting units, and analog signal output unit connects with acceleration transducer
It connects, acceleration transducer is connect with isolating converter.
2. the experiment detection device of acceleration transducer according to claim 1, which is characterized in that USB communication units with
Computer connects.
3. the experiment detection device of acceleration transducer according to claim 1, which is characterized in that described device further includes
Lithium battery power supply unit, for being powered to device.
4. the experiment detection device of acceleration transducer according to claim 1, which is characterized in that analog signal output list
The model DAC8531 of member；The model ADS1255I of ADC collecting units；The model of FPGA central locations
ep4ce6e22c8n；The model pl2303 of USB communication units.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721645666.8U CN207937801U (en) | 2017-11-30 | 2017-11-30 | A kind of experiment detection device of acceleration transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721645666.8U CN207937801U (en) | 2017-11-30 | 2017-11-30 | A kind of experiment detection device of acceleration transducer |
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| Publication Number | Publication Date |
|---|---|
| CN207937801U true CN207937801U (en) | 2018-10-02 |
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| CN201721645666.8U Active CN207937801U (en) | 2017-11-30 | 2017-11-30 | A kind of experiment detection device of acceleration transducer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470887A (en) * | 2018-11-09 | 2019-03-15 | 中国核动力研究设计院 | A kind of earthquake instrument system accelerometer Special testing device and method |
-
2017
- 2017-11-30 CN CN201721645666.8U patent/CN207937801U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470887A (en) * | 2018-11-09 | 2019-03-15 | 中国核动力研究设计院 | A kind of earthquake instrument system accelerometer Special testing device and method |
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