CN210109138U - Calibration system of ship accelerometer - Google Patents
Calibration system of ship accelerometer Download PDFInfo
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- CN210109138U CN210109138U CN201920996154.9U CN201920996154U CN210109138U CN 210109138 U CN210109138 U CN 210109138U CN 201920996154 U CN201920996154 U CN 201920996154U CN 210109138 U CN210109138 U CN 210109138U
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- accelerometer
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Abstract
The embodiment of the utility model provides a calibration system of a ship accelerometer, which comprises a controller, a signal generator and a control signal generator, wherein the controller is connected with the input end of the signal generator through a signal line and sends a control signal; the output end of the signal generator is connected with the input end of the power amplifier through a signal wire, and an excitation signal under the calibration frequency is output according to the control signal; the output end of the power amplifier is connected with the input end of the vibration exciter through a signal wire, and receives and amplifies the excitation signal; the output end of the vibration exciter is connected with the force sensor through a signal line, and a constant vibration signal is generated according to the excitation signal; the force sensor is arranged on a fixed rod of the vibration exciter and transmits the vibration signal to the ship structure; the standard wireless accelerometer is arranged on one side of the calibrated accelerometer and generates a first speed response value according to the vibration signal; and the calibrated accelerometer is connected with the input end of the controller through a signal line and generates a second speed response value according to the vibration signal.
Description
Technical Field
The utility model belongs to the technical field of the measurement calibration, especially, relate to a marine accelerometer's calibration system.
Background
In many fields, meters are used as important monitoring devices and have important functions of representing performance states, fault states and the like of monitored products. Therefore, when the instrument works on line, clear requirements are provided for the accuracy of numerical value acquisition. Usually, a metering cycle is specified for each type of meter, and the metering cycle of a meter is generally required to be one year.
The metering calibration is convenient for instruments used in laboratories or portable instruments, but when the instruments fixedly installed on ships are used for metering calibration, the processes of disassembling, delivering, resetting and the like are needed, and the measurement calibration is usually troublesome. In particular, it is more difficult to realize a meter requiring airtightness, a meter which is disposed in a narrow space and is not easily attached and detached, a meter requiring high reliability, and an integrally wired meter.
In practical engineering applications, such meters (for example, accelerometers for monitoring self-noise of ship hulls) are often not calibrated according to the measurement period requirement, but are generally calibrated selectively during repair, so that there is a great risk in the reliability and accuracy of data collected by such meters.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the embodiment of the utility model provides a calibration system of marine accelerometer for solve prior art can't make things convenient for fast to fixed mounting on boats and ships, be difficult to the accelerometer of dismantling measure the calibration, lead to being difficult to ensure the technical problem of accelerometer data collection's reliability and accuracy.
An embodiment of the utility model provides a marine accelerometer's calbiration system, the system includes:
the controller is connected with the input end of the signal generator through a signal line and sends a control signal;
the output end of the signal generator is connected with the input end of the power amplifier through a signal wire, and the excitation signal under the calibration frequency is output according to the control signal;
the output end of the power amplifier is connected with the input end of the vibration exciter through a signal wire, and receives and amplifies the excitation signal;
the output end of the vibration exciter is connected with the force sensor through a signal line, and a constant vibration signal is generated according to the excitation signal;
the force sensor is arranged on a fixed rod of the vibration exciter and transmits the vibration signal to a ship structure;
the standard wireless accelerometer is arranged on one side of the calibrated accelerometer and generates a first speed response value according to the vibration signal;
and the calibrated accelerometer is connected with the input end of the controller through a signal line and generates a second speed response value according to the vibration signal.
In the above scheme, the controller is integrated with a wireless receiving module.
In the above solution, the controller, the signal generator, the vibration exciter, the force sensor, the standard wireless accelerometer, and the calibrated accelerometer are installed at corresponding positions of a ship structure.
In the above scheme, the vibration exciter includes: any one of an electromagnetic vibration exciter, an electrodynamic vibration exciter, and a hydraulic vibration exciter.
In the above scheme, the standard wireless accelerometer is connected to the controller through a wireless channel.
In the above solution, the calibrated accelerometer includes: a charge type accelerometer or a piezoelectric type accelerometer.
In the above aspect, the controller includes: programmable Logic Controller (PLC).
In the above solution, the maximum error of the standard wireless accelerometer is 1/4 of the maximum error of the calibrated accelerometer.
An embodiment of the utility model provides a marine accelerometer's calibration system, the system includes: the controller is connected with the input end of the signal generator through a signal line and sends a control signal; the output end of the signal generator is connected with the input end of the power amplifier through a signal wire, and the excitation signal under the calibration frequency is output according to the control signal; the output end of the power amplifier is connected with the input end of the vibration exciter through a signal wire, and receives and amplifies the excitation signal; the output end of the vibration exciter is connected with the force sensor through a signal line, and a constant vibration signal is generated according to the excitation signal; the force sensor is arranged on a fixed rod of the vibration exciter and transmits the vibration signal to the ship structure; the standard wireless accelerometer is arranged on one side of the calibrated accelerometer and generates a first speed response value according to the vibration signal; the calibrated accelerometer is connected with the input end of the controller through a signal line and generates a second speed response value according to the vibration signal; the controller calibrates a calibration factor of the calibrated accelerometer according to the first speed response value and the second speed response value; therefore, a controller, a signal generator, a power amplifier, a vibration exciter and a force sensor which are arranged on a ship structure can be used for outputting a constant output force, so that a calibrated accelerometer and a standard wireless accelerometer respectively generate a first speed response value and a second speed response value, the controller calibrates the second speed response value based on the difference value of the first speed response value and the second speed response value, the second speed response value is consistent with the first speed response value, the calibration of the calibrated accelerometer is completed, the calibrated accelerometer does not need to be disassembled, the calibration of the calibrated accelerometer can be conveniently and quickly realized, and the reliability and the accuracy of data collected by the calibrated accelerometer during working are ensured; and the standard wireless accelerometer is adopted, so that complicated wiring on site is avoided.
Drawings
Fig. 1 is a schematic overall structural diagram of a calibration system for a marine accelerometer according to an embodiment of the present invention;
fig. 2 is a schematic signal flow diagram of a calibration system for a marine accelerometer according to an embodiment of the present invention.
Description of reference numerals:
1-a controller; 2-a signal generator; 3-a power amplifier; 4-a vibration exciter; 5-a force sensor; 6-standard wireless accelerometer; 7-calibrated accelerometer; 8-ship structure.
Detailed Description
In order to solve prior art can't conveniently measure the calibration fast to fixed mounting on boats and ships, the accelerometer that is difficult to dismantle, lead to being difficult to ensure the technical problem of the reliability and the accuracy of accelerometer data collection, the embodiment of the utility model provides a calibration system of boats and ships accelerometer, the system includes: the controller is connected with the input end of the signal generator through a signal line and sends a control signal; the output end of the signal generator is connected with the input end of the power amplifier through a signal wire, and the excitation signal under the calibration frequency is output according to the control signal; the output end of the power amplifier is connected with the input end of the vibration exciter through a signal wire, and receives and amplifies the excitation signal; the output end of the vibration exciter is connected with the force sensor through a signal line, and a constant vibration signal is generated according to the excitation signal; the force sensor is arranged on a fixed rod of the vibration exciter and transmits the vibration signal to the ship structure; the standard wireless accelerometer is arranged on one side of the calibrated accelerometer and generates a first speed response value according to the vibration signal; and the calibrated accelerometer is connected with the input end of the controller through a signal line and generates a second speed response value according to the vibration signal.
The technical solution of the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.
The present embodiment provides a calibration system for a marine accelerometer, the system comprising: the device comprises a controller 1, a signal generator 2, a power amplifier 3, a vibration exciter 4, a force sensor 5, a standard wireless accelerometer 6 and a calibrated accelerometer 7; wherein, the controller 1, the signal generator 2, the power amplifier 3, the vibration exciter 4, the standard wireless accelerometer 6 and the calibrated accelerometer 7 are all arranged at corresponding positions of the ship structure 8.
The output end of the controller 1 is connected with the input end of the signal generator 2 through a signal line, and is used for sending a control signal to the signal generator 2.
The output end of the signal generator 2 is connected with the input end of the power amplifier 3 through a signal wire and used for outputting an excitation signal under the calibration frequency according to the control signal;
the output end of the power amplifier 3 is connected with the input end of the vibration exciter through a signal wire and used for receiving and amplifying the excitation signal; the vibration exciter 4 is arranged on the ship structure, and the output end of the vibration exciter 4 is connected with the force sensor 5 through a signal line and used for generating a constant vibration signal according to the excitation signal; the vibration signal is a constant excitation force. In practical applications, the vibration exciter 4 may be any one of an electromagnetic vibration exciter, an electrodynamic vibration exciter, and a hydraulic vibration exciter.
Here, the mounting position of the exciter 4 is required to satisfy the test signal-to-noise ratio of the calibrated accelerometer 7, and the test signal-to-noise ratio of the calibrated accelerometer 7 is greater than 60 dB.
The force sensor 3 is mounted on a fixing rod of the vibration exciter 4 and is used for transmitting a vibration signal to the ship structure.
The standard wireless accelerometer 6 is arranged on one side of the calibrated accelerometer 7, is close to the calibrated accelerometer 7, and is used for generating a first speed response value according to a vibration signal when the standard wireless accelerometer receives the vibration signal, and sending the first speed response value to the controller 1 through wireless transmission. Here, the standard wireless accelerometer 6 needs to be calibrated in the laboratory before being calibrated in the field, and the maximum error of the standard wireless accelerometer 6 is 1/4 of the maximum error of the calibrated accelerometer 7, or the maximum uncertainty of the standard wireless accelerometer 6 is 1/4 of the maximum measurement uncertainty of the calibrated accelerometer 7.
Here, when the standard wireless accelerometer 6 receives the vibration signal, it is specifically configured to:
determining a first velocity response value according to equation (1):
V1＝FY1(1)
in the formula (1), V1Is a first speed response value; f is the excitation force corresponding to the vibration signal, Y1Is the first admittance of the exciter 4 to said standard wireless accelerometer 6.
The calibrated accelerometer 7 is connected with the input end of the controller 1 through a signal line, and is used for generating a second speed response value according to the vibration signal and sending the second speed response value to the controller 1.
Here, when the calibrated accelerometer 7 receives a vibration signal, it is specifically configured to:
determining a second speed response value according to equation (2):
V2＝FY2(2)
in the formula (2), V2Is a second velocity response value; f is the excitation force corresponding to the vibration signal, Y2A second admittance of the exciter 4 to the calibrated accelerometer 7.
In practice, the calibrated accelerometer 7 may be a charge-type accelerometer or a piezoelectric-type accelerometer.
It should be noted that, referring to fig. 1, the calibrated accelerometer 7 actually includes a plurality of accelerometers, and accordingly, the standard wireless accelerometer 6 also includes a plurality of accelerometers.
The controller 1 may be a PLC controller, and a wireless receiving module is integrated in the controller 1, so that the controller may be connected to the standard wireless accelerometer 6 through a wireless channel to receive the first speed response value sent by the standard wireless accelerometer 6, or may receive the first speed response value sent by the calibrated accelerometer 7 through a wired signal. When the controller 1 receives the first speed response value and the second speed response value, the first speed response value and the second speed response value may be displayed, and the calibration factor of the calibrated accelerometer 7 is calibrated according to the first speed response value and the second speed response value, specifically:
determining a difference between the first speed response value and the second speed response value;
and calibrating the calibration factor of the calibrated accelerometer according to the difference value, so that the first speed response value is consistent with the second speed response value. In this way, the calibrated accelerometer 7 is calibrated.
The embodiment of the utility model provides a beneficial effect that ship accelerometer's calibration system can bring is at least:
the embodiment of the utility model provides a marine accelerometer's calibration system, the system includes: the controller is connected with the input end of the signal generator through a signal line and used for sending a control signal to the signal generator; the output end of the signal generator is connected with the input end of the power amplifier through a signal wire and used for outputting an excitation signal under the calibration frequency according to the control signal; the output end of the power amplifier is connected with the input end of the vibration exciter through a signal wire and used for receiving and amplifying the excitation signal; the output end of the vibration exciter is connected with the force sensor through a signal line and used for generating a constant vibration signal according to the excitation signal; the force sensor is used for transmitting the vibration signal to the ship structure; the standard wireless accelerometer is arranged on one side of the calibrated accelerometer, generates a first speed response value according to the vibration signal, and sends the first speed response value to the controller through wireless transmission; the calibrated accelerometer is connected with the input end of the controller through a signal line and used for generating a second speed response value according to the vibration signal and sending the second speed response value to the controller; the controller calibrates a calibration factor of the calibrated accelerometer according to the first speed response value and the second speed response value; therefore, a controller, a signal generator, a power amplifier, a vibration exciter and a force sensor which are arranged on a ship structure can be used for outputting a constant output force, so that a calibrated accelerometer and a standard wireless accelerometer respectively generate a first speed response value and a second speed response value, the controller calibrates the second speed response value based on the difference value of the first speed response value and the second speed response value, the second speed response value is consistent with the first speed response value, the calibration of the calibrated accelerometer is completed, the calibrated accelerometer does not need to be disassembled, the calibration of the calibrated accelerometer can be conveniently and quickly realized, and the reliability and the accuracy of data collected by the calibrated accelerometer during working are ensured; and the standard wireless accelerometer is adopted, so that complicated wiring on site is avoided, and further, the engineering application problems of complicated wiring and the like during calibration are avoided.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A system for calibrating a marine accelerometer, the system comprising:
the controller is connected with the input end of the signal generator through a signal line and sends a control signal;
the output end of the signal generator is connected with the input end of the power amplifier through a signal wire, and the excitation signal under the calibration frequency is output according to the control signal;
the output end of the power amplifier is connected with the input end of the vibration exciter through a signal wire, and receives and amplifies the excitation signal;
the output end of the vibration exciter is connected with the force sensor through a signal line, and a constant vibration signal is generated according to the excitation signal;
the force sensor is arranged on a fixed rod of the vibration exciter and transmits the vibration signal to a ship structure;
the standard wireless accelerometer is arranged on one side of the calibrated accelerometer and generates a first speed response value according to the vibration signal;
and the calibrated accelerometer is connected with the input end of the controller through a signal line and generates a second speed response value according to the vibration signal.
2. The system of claim 1, wherein a wireless receiving module is integrated into the controller.
3. The system of claim 1, wherein the controller, the signal generator, the exciter, the force sensor, the standard wireless accelerometer, and the calibrated accelerometer are mounted at respective locations of a marine structure.
4. The system of claim 1, wherein the exciter comprises: any one of an electromagnetic vibration exciter, an electrodynamic vibration exciter, and a hydraulic vibration exciter.
5. The system of claim 1, wherein the standard wireless accelerometer is connected to the controller via a wireless channel.
6. The system of claim 1, wherein the calibrated accelerometer comprises: a charge type accelerometer or a piezoelectric type accelerometer.
7. The system of claim 1, wherein the controller comprises: a PLC controller.
8. The system of claim 1, wherein the maximum error of the standard wireless accelerometer is 1/4 of the maximum error of the calibrated accelerometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920996154.9U CN210109138U (en) | 2019-06-28 | 2019-06-28 | Calibration system of ship accelerometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920996154.9U CN210109138U (en) | 2019-06-28 | 2019-06-28 | Calibration system of ship accelerometer |
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| Publication Number | Publication Date |
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| CN210109138U true CN210109138U (en) | 2020-02-21 |
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| CN201920996154.9U Expired - Fee Related CN210109138U (en) | 2019-06-28 | 2019-06-28 | Calibration system of ship accelerometer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261645A (en) * | 2019-06-28 | 2019-09-20 | 中国船舶重工集团公司第七一九研究所 | A kind of calibration system of ship accelerometer |
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2019
- 2019-06-28 CN CN201920996154.9U patent/CN210109138U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261645A (en) * | 2019-06-28 | 2019-09-20 | 中国船舶重工集团公司第七一九研究所 | A kind of calibration system of ship accelerometer |
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