CN211954418U

CN211954418U - Hidden vibration sensor measuring device with preset vibration parameters

Info

Publication number: CN211954418U
Application number: CN202020584598.4U
Authority: CN
Inventors: 刘一; 蒋帆; 武泽
Original assignee: Shanghai Institute of Measurement and Testing Technology
Current assignee: Shanghai Institute of Measurement and Testing Technology
Priority date: 2020-04-20
Filing date: 2020-04-20
Publication date: 2020-11-17
Anticipated expiration: 2030-04-20

Abstract

The utility model relates to a hidden vibration sensor measuring device who presets vibration parameter, its characterized in that: the measuring device comprises a vibrating table fixed at the bottom of a case body, a standard acceleration sensor is fixed at the center of the vibrating table, a sensor to be measured is fixed on the standard acceleration sensor and is positioned at a through hole formed in the center of a top plate of the case, a host computer connected with the vibrating table in a circuit mode is arranged beside the vibrating table, the host computer is further respectively connected with an A/D conversion module, a data storage module, a D/A conversion module and a control key circuit arranged on the outer surface of the top plate of the case, the A/D conversion module is respectively connected with the standard acceleration sensor and the sensor to be measured in a circuit mode, and the D/A conversion module is further respectively connected with the power amplifier and a signal lamp circuit arranged on the surface of the top plate of the case. The utility model discloses carry out hidden design to presetting vibration parameter, only indicate measuring result through the signal lamp.

Description

Hidden vibration sensor measuring device with preset vibration parameters

Technical Field

The utility model relates to a calibration measuring device for vibration sensor especially discloses a hidden vibration sensor measuring device who presets vibration parameter, carries out hidden design to presetting the vibration parameter, effectively avoids the people for falsifying the parameter, and measuring result is stable accurate, can judge the condition whether the sensor that awaits measuring needs the calibration according to the measuring result suggestion, is applicable to the measurement and detects the trade and measure vibration sensor before verifying vibration sensor operating condition's stability.

Background

Vibration sensors are widely used in power plants, airports, building research companies, etc., however, vibration sensors need to be recalibrated after a period of use.

In order to calibrate the vibration sensor, at present, a vibration measurement laboratory is established by a large number of enterprises, public institutions, universities and research institutes according to the verification rules of piezoelectric accelerometers, JJJG 233-2008, the verification rules of magnetoelectric velocity sensors and JJG 644-2003 verification rules of vibration displacement sensors, which are published by the State quality inspection and quarantine Bureau, and is provided with a vibration sensor verification or calibration device. In order to ensure the accuracy of the measurement results, the measurement results are usually compared by transmitting the same or a group of "stable" vibration sensors to perform measurement in the manners of comparison, capability verification, measurement verification, period verification and quality monitoring.

However, these methods have a problem that a sensor considered as "stable" does not always keep stable, and once an unstable phenomenon occurs, a problem at a node cannot be determined from a time point. Taking a comparison experiment as an example, in order to reduce the probability of problems, a leading laboratory of comparison generally adopts petal type transmission, the transmission process is divided into a plurality of small rings, each time one small ring is completed, a transmission sample returns to the leading laboratory again for retesting, and the stability of comparison quantity values is verified. In this way, control of the sample stability of the transfer process is indeed enhanced, but is less than ideal, mainly for two reasons, first, if instability of the transferred sample occurs in a certain small loop and then returns to the original vibration sensitivity, this will not be found. Secondly, even if the sample is stably transferred in the whole link, the sample is always returned to a leading laboratory for retesting, so that the whole process is complicated, and unnecessary transfer time is increased. For the above reasons, a vibration sensor measuring device with hidden preset vibration parameters is urgently needed to be developed.

Disclosure of Invention

The utility model aims at solving prior art's defect, design a hidden vibration sensor measuring device who presets vibration parameter, after the sensor that awaits measuring is installed to carry out unmanned on duty's measurement to the sensor that awaits measuring according to presetting vibration parameter, effectively avoid artificial tampering parameter, be applicable to the measurement and detect the trade and carry out measurement result to vibration sensor under the secret circumstances of measurement result needs and stabilize the accuracy, can judge the condition whether the sensor that awaits measuring needs the calibration according to the measurement result suggestion, remedy current measurement mode's not enough.

The utility model discloses a realize like this: the utility model provides a hidden preset vibration parameter's vibration sensor measuring device which characterized in that: the measuring device comprises a vibrating table, a power amplifier, a standard acceleration sensor, an A/D conversion module, a data storage module, a host, a D/A conversion module, a control key, a signal lamp and a case, wherein the vibrating table is fixed at the bottom of a case body of the case, the standard acceleration sensor is fixed at the central part of the vibrating table, a sensor to be measured is fixed on the standard acceleration sensor and is positioned at a through hole arranged at the center of a top plate of the case, the host which is electrically connected with the vibrating table is arranged beside the vibrating table, the host is connected with an external power supply and is also respectively connected with the A/D conversion module, the data storage module, the D/A conversion module, the power amplifier and the control key arranged on the outer surface of the top plate of the case, the A/D conversion module is respectively electrically connected with the standard acceleration sensor and the sensor to, the data storage module stores data information of frequency f and acceleration a for driving the vibration of the vibration table, driving coefficient k of the vibration table at the frequency f and the acceleration a, sensitivity S of a standard acceleration sensor and sensitivity S of a sensor to be detected. The case is provided with a case door with a lock, the case is integrally of a closed structure after the case door is closed, and the host is provided with a data input interface which is arranged in the case.

The working path of the measuring device is as follows: the host is controlled to start or stop through the control key, the host reads the vibration frequency f and the acceleration a of the driving vibration table in the data storage module and the driving coefficient k of the vibration table, sends a digital signal to the D/A conversion module, and drives the D/A conversion module to work and output an analog signal Sig [ kasin (2 pi ft) ])]The power amplifier amplifies an analog signal Sig [ kasin (2 pi ft) ] output by the D/A conversion module]The back driving vibration table works to generate mechanical vibration with frequency f 'and acceleration a', the sensor to be measured and the standard acceleration sensor are used for measuring the mechanical vibration of the vibration table and outputting analog signals, the A/D conversion module is used for collecting the analog signals output by the standard acceleration sensor and the sensor to be measured, converting the analog signals into digital signals and respectively storing the digital signals into a DATA (DATA) in a host computer_nAnd data_nThe host passes the pair DATA_nAnd data_n.Calculating and acquiring the sensitivity amplitude sn of the sensor to be measured by a sine approximation method, feeding the sensitivity amplitude sn back to a data storage module for storing data, and calculating sn and a previously stored measurement result si (0)<i<n) E_nValue, E_nAnd when the value is less than or equal to 1, outputting a digital signal 1 to a D/A conversion module to drive the D/A conversion module to output a high level, and turning on a green light by a signal lamp, or turning on a red light.

The utility model has the advantages that: after the sensor to be measured is installed by the third party, unattended measurement is carried out on the sensor to be measured according to the preset vibration parameters, the stability of the measurement result is obtained, and the method is suitable for measuring the sensor to be measured and giving a prompt representing the stability under the condition that the measurement result needs to be kept secret in the metering and detecting industry.

Drawings

Fig. 1 is a schematic diagram of the sectional structure of the present invention.

Fig. 2 is a front view of fig. 1.

In the figure: 1. a vibration table; 2. A power amplifier; 3. A standard acceleration sensor; 4. An A/D conversion module; 5. A data storage module; 6. A host; 7. A D/A conversion module; 8. A control key; 9. A signal lamp; 10. A sensor to be tested; 11. A case.

Detailed Description

The invention will be further explained with reference to the drawings and the specific embodiments.

According to attached drawing 1 and attached drawing 2, the utility model relates to a hidden vibration sensor measuring device who presets vibration parameter, including shaking table 1, power amplifier 2, standard acceleration sensor 3, AD conversion module 4, data storage module 5, host computer 6, DA conversion module 7, control key 8, signal lamp 9, the sensor 10 and quick-witted case 11 that await measuring.

The vibration table 1 is fixed at the bottom of the case body of the case 10, the standard acceleration sensor 3 is fixed at the central part of the vibration table 1, and the sensor 10 to be measured, which is a transmission sample, is fixed on the standard acceleration sensor 3 and is positioned at a through hole arranged at the center of the top plate of the case 10. The vibration table 1 side be equipped with it circuit connection host computer 6, host computer 6 be connected with external power supply, still respectively with locate quick-witted case 10 inside AD conversion module 4, data storage module 5, D/A conversion module 7, power amplifier 2 and locate quick-witted case 10 roof surface control key 8 circuit connection, AD conversion module 4 respectively with standard acceleration sensor 3 and the sensor 10 circuit connection that awaits measuring. The D/A conversion module 7 is sequentially connected with the power amplifier 2 and a signal lamp 9 arranged on the surface of the top plate of the case 10 in a circuit mode. The case 11 is provided with a case door with a lock, and after the case door is closed, the case is integrally of a closed structure, and a laboratory custody case door key is guided to avoid inaccurate measuring results caused by manual parameter tampering. The host machine 6 is provided with a data input interface, relevant data for testing input through the data input interface are stored in the data storage module 5, the data input interface is arranged in the case 11, and after the case door is closed, the data input interface can not be tampered manually.

The working principle of the utility model is as follows:

the data storage module 5 stores the frequency f and the acceleration a for driving the vibration of the vibration table, and the driving coefficient k and the standard of the vibration table at the frequency f and the acceleration aThe sensitivity S of the quasi-acceleration sensor and the sensitivity S of the sensor to be measured. The control key 8 is used for controlling the start and stop of the host 6. The host 6 is powered on and started by pressing a control key 8, the host 6 reads the vibration frequency f and the acceleration a of the driving vibration table and the driving coefficient k of the vibration table stored in the data storage module 5, sends a digital signal to the D/A conversion module 7, and drives the D/A conversion module 7 to output an analog signal Sig [ kasin (2 pi ft) ])]. The power amplifier 2 amplifies an analog signal Sig [ kasin (2 pi ft) ] output by the D/A conversion module 7]The vibration table 1 is driven to work. The vibration table 1 generates mechanical vibrations of frequency f ', acceleration a'. The sensor to be measured 10 and the standard acceleration sensor 3 are used for measuring the mechanical vibration of the vibration table 1 and outputting analog signals. The A/D conversion module 4 collects analog signals output by the standard acceleration sensor 3 and the sensor to be detected 10, converts the analog signals into digital signals, and respectively stores the digital signals as DATA in the host 6_nAnd data_n. Host 6 pairs DATA_nAnd data_n.And calculating and acquiring a sensitivity amplitude sn of the sensor 10 to be detected by a sine approximation method, and feeding back the sensitivity amplitude sn to the data storage module 5 for data storage. The host computer 6 calculates sn and the previously stored measurement si (0)<i<n) E_nThe value is obtained. If E is_nAnd when the value is less than or equal to 1, outputting a digital signal 1 to the D/A conversion module 7, and driving the D/A conversion module 7 to output a high level to enable the signal lamp 9 to light green, otherwise, lighting red.

Adopt the utility model discloses measuring device's concrete measurement step is as follows:

1. the leading party writes the frequency f and the acceleration a of the vibration of the driving vibration table, the driving coefficient k of the vibration table at the frequency f and the acceleration a, the sensitivity S of the standard acceleration sensor and the sensitivity S of the sensor to be measured into the data storage module 5.

2. The leading party will the utility model discloses the product is sent for the test party of participating in.

3. The participating party presses the control key 8 to start the host 6 to work, and finally the green light or the red light is turned on through the signal lamp 9 to feed back the measurement result.

4. The party of participating judges the sensor that awaits measuring according to the measuring result that signal lamp 9 shows whether need the calibration, if be green light, then need pull down the sensor that awaits measuring and begin the calibration, if be red light, then need not the calibration, will the utility model discloses the product returns the leading party can.

The utility model discloses carry out hidden design to the concrete numerical value of vibration parameter and measuring result, the measuring result is saved in built-in storage module, and the third party can't know, only through the stability of signal lamp suggestion measuring result.

Claims

1. The utility model provides a hidden preset vibration parameter's vibration sensor measuring device which characterized in that: the measuring device comprises a vibrating table, a power amplifier, a standard acceleration sensor, an A/D conversion module, a data storage module, a host, a D/A conversion module, a control key, a signal lamp and a case, wherein the vibrating table is fixed at the bottom of a case body of the case, the standard acceleration sensor is fixed at the central part of the vibrating table, a sensor to be measured is fixed on the standard acceleration sensor and is positioned at a through hole arranged at the center of a top plate of the case, the host which is electrically connected with the vibrating table is arranged beside the vibrating table, the host is connected with an external power supply and is also respectively connected with the A/D conversion module, the data storage module, the D/A conversion module, the power amplifier and the control key arranged on the outer surface of the top plate of the case, the A/D conversion module is respectively electrically connected with the standard acceleration sensor and the sensor to, the data storage module stores data information of frequency f and acceleration a for driving the vibration of the vibration table, driving coefficient k of the vibration table at the frequency f and the acceleration a, sensitivity S of a standard acceleration sensor and sensitivity S of a sensor to be detected.

2. The hidden preset vibration parameter vibration sensor measuring device of claim 1, wherein the working path of the measuring device is: the host computer is controlled to start or stop by the control key, reads the vibration frequency f, the acceleration a and the driving coefficient k of the vibration table in the data storage module and sends a digital signal to D/A conversionModule for driving D/A conversion module to work and output analog signal Sig [ kasin (2 pi ft) ]]The power amplifier amplifies an analog signal Sig [ kasin (2 pi ft) ] output by the D/A conversion module]The back driving vibration table works to generate mechanical vibration with frequency f 'and acceleration a', the sensor to be measured and the standard acceleration sensor are used for measuring the mechanical vibration of the vibration table and outputting analog signals, the A/D conversion module is used for collecting the analog signals output by the standard acceleration sensor and the sensor to be measured, converting the analog signals into digital signals and respectively storing the digital signals into a DATA (DATA) in a host computer_nAnd data_nThe host passes the pair DATA_nAnd data_n.Calculating and acquiring the sensitivity amplitude sn of the sensor to be measured by a sine approximation method, feeding the sensitivity amplitude sn back to a data storage module for storing data, and calculating sn and a previously stored measurement result si (0)<i<n) E_nValue, E_nAnd when the value is less than or equal to 1, outputting a digital signal 1 to a D/A conversion module to drive the D/A conversion module to output a high level, and turning on a green light by a signal lamp, or turning on a red light.

3. The hidden preset vibration parameter vibration sensor measurement device of claim 1, wherein: the case is provided with a case door with a lock, the case is integrally of a closed structure after the case door is closed, and the host is provided with a data input interface which is arranged in the case.