CN209783627U - tensile, compression, vibration and alternating damp-heat fatigue testing device for optical fiber sensor - Google Patents
tensile, compression, vibration and alternating damp-heat fatigue testing device for optical fiber sensor Download PDFInfo
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- CN209783627U CN209783627U CN201920388229.5U CN201920388229U CN209783627U CN 209783627 U CN209783627 U CN 209783627U CN 201920388229 U CN201920388229 U CN 201920388229U CN 209783627 U CN209783627 U CN 209783627U
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Abstract
The utility model provides a tensile, compressive, vibration and alternation damp and hot fatigue test device of an optical fiber sensor, which comprises the optical fiber sensor, a tensile and compressive stress generating device, a vibration generating device, an environmental test box, an optical fiber sensing analyzer, a data acquisition system and a computer; the tensile and compressive stress generating device is configured to provide tensile and compressive stress to the optical fiber sensor; the vibration generating device is configured to provide a vibratory stress; the environmental test chamber is used for providing an alternating damp and hot environment; the method comprises the following steps that an optical fiber sensing analyzer obtains and measures the central wavelength of an optical fiber sensor; the data acquisition system is used for acquiring temperature, humidity and stress sensing data during a fatigue test period; the testing device can provide tensile, compressive stress, vibrational stress, temperature and humidity stress to the fiber optic sensor simultaneously or separately. The device reduces the construction cost of the test equipment while ensuring the test accuracy, and integrates the tensile, compression, vibration and alternating damp-heat fatigue tests of the optical fiber sensor.
Description
Technical Field
The utility model relates to a testing arrangement technical field, concretely relates to tensile, compression, vibration and wet hot fatigue test device of reversal of optical fiber sensor.
Background
with the rapid development of science and technology, the research and application of optical fiber sensors have been expanded from laboratories to the actual engineering field, and have been applied to structural health monitoring of large engineering facilities such as bridges, dams, offshore engineering, airplanes, ships and the like at present, and the damage degree and service state of the facilities are evaluated by monitoring internal parameters such as strain, stress, temperature, vibration and the like.
Compared with the traditional sensor, the optical fiber sensor has the characteristics of strong anti-interference capability, integration of signal transmission and the sensor and easiness in realizing distributed sensing. However, in engineering application environments such as bridges and offshore engineering, alternating loads need to be borne, so that the fatigue test of the optical fiber sensor for strain and stress detection of the structures has important significance.
The existing fatigue testing method is a stress fatigue testing method which is changed into an evaluation index based on spectral characteristics, but the method is not convenient to be applied to actual strain monitoring, an expensive spectrometer is used as testing equipment, and the construction cost of the testing equipment is high. However, in the case of the optical fiber sensor, the spectral characteristics and the like are distorted during the fatigue test, and the sensing ability is lost before the fatigue fracture. Therefore, it is necessary to provide a device for testing the tensile, compressive, vibratory and alternating wet-heat fatigue of an optical fiber sensor to solve the problems in the prior art.
SUMMERY OF THE UTILITY MODEL
In order to overcome exist not enough among the prior art, the utility model aims to provide an optical fiber sensor is tensile, compression, vibration and alternation damp and hot fatigue test device, for the produced test equipment of stress fatigue test device that traditional changes into the evaluation index based on spectral characteristic builds with high costs, the unsafe problem of test data, the utility model provides a uniformity and repeatability (output data's standard deviation under the same conditions) are evaluation index and based on the test device of optical fiber sensor analysis appearance as wavelength analysis equipment based on optical fiber sensor output data, and the device can reduce test equipment and build the cost in the time of guarantee test accuracy to integrated optical fiber sensor is tensile, compression, vibration and alternation damp and hot fatigue test in an organic whole.
in order to realize the purpose, the utility model discloses a technical scheme as follows:
a fiber sensor tensile, compression, vibration and alternating damp-heat fatigue test device comprises a fiber sensor, a tensile compression stress generating device, a vibration generating device, an environmental test box, a fiber sensing analyzer, a data acquisition system and a computer;
The tensile and compressive stress generating device is configured to provide tensile and compressive stresses to the optical fiber sensor, and includes a servo motor, a servo motor driver, a PLC (Programmable Logic Controller), a sliding guide rail, a sliding clamp, a lead screw, a fixing clamp and a stress sensor.
The vibration generating device is configured to provide vibration stress to the optical fiber sensor and comprises a vibration motor and a servo motor driver; the vibration motor is connected with the servo motor driver through a cable.
The environment test box provides an alternating damp and hot environment for the optical fiber sensor, namely provides temperature and humidity stress.
the optical fiber sensing analyzer acquires and measures the central wavelength of the optical fiber sensor, and simultaneously sends the measured data to the computer for storage.
the data acquisition system is used for acquiring temperature and humidity data and stress sensing data during the fatigue test period and sending the temperature and humidity data and the stress sensing data to the computer for processing.
Specifically, the fatigue test is one of reliability tests, and is used for testing the fatigue performance criterion of rubber, plastic samples or simulation machine parts subjected to alternating loads under various environments and researching the fracture process of the rubber, plastic samples or simulation machine parts.
The test device may provide one or more stresses.
In particular, the testing device may provide one or more stresses, i.e. the testing device may provide tensile, compressive, vibrational, temperature and humidity stresses to the fibre optic sensor simultaneously or separately.
Preferably, a rotating shaft of the servo motor is connected with a screw rod through a screw, and the screw rod is connected with the sliding clamp; the servo motor driver is connected with the servo motor and the PLC through cables.
Preferably, two ends of the optical fiber sensor are respectively fixed by a sliding clamp and a fixing clamp; the sliding clamp and the fixing clamp are provided with grooves, and the grooves are used for leading out tail fibers of the optical fiber sensor.
Further, the fixing jig is fixed to one side of the guide rail by a screw.
Preferably, one end of the stress sensor is fixed on the base of the fixing clamp, and the other end of the stress sensor is connected with the optical fiber sensor clamp.
specifically, the optical fiber sensor clamp is a mechanical part for fixing the optical fiber grating, and different types of optical fiber gratings adopt different customized clamps.
Preferably, the data acquisition system comprises a data acquisition card and an electronic hygrothermograph, and the data acquisition card is connected with the stress sensor and the computer through data lines.
Specifically, the data acquisition system is used for recording temperature and humidity data and stress sensor data during a fatigue test period, and consistency and repeatability (standard deviation of output data under the same condition) of the output data of the optical fiber sensor are used as test evaluation indexes.
Preferably, the vibration motor is arranged below the optical fiber sensor and is tightly attached to the optical fiber sensor.
Preferably, the PLC, the environmental test chamber and the electronic hygrothermograph are connected with a computer through data lines.
Preferably, a servo motor control program, a vibration motor control program, an environmental test box control program and a data acquisition control program are stored in the computer;
The servo motor control program and the vibration motor control program are used for sending regulation and control instructions to corresponding motors, the regulation and control instructions control and regulate tensile stress, compressive stress and vibration stress applied to the optical fiber sensor, and simultaneously the tensile stress, the compressive stress and the vibration stress application times, period and intensity are stored in a computer;
The environment test box control program is used for regulating and controlling the temperature and humidity stress of the environment test box on the optical fiber sensor;
And the data acquisition program is used for driving the data acquisition card to acquire and store the temperature and humidity data and the stress sensor data of the optical fiber sensor.
Preferably, the optical fiber sensing analyzer can be an optical power meter or a spectrometer.
Specifically, the optical fiber sensing analyzer, the optical power meter and the spectrometer are all used for analyzing optical fiber characteristics.
The utility model has the advantages that:
(1) The utility model reduces the construction cost of the testing device while ensuring the testing accuracy, and has the advantages of low cost and easy operation;
(2) The utility model provides an integrated fiber sensor of testing arrangement is tensile, compression, vibration and alternation damp and hot fatigue test in an organic whole, but alternative selection one or more test has advantage convenient, that the flexibility is strong, maneuverability is strong.
Drawings
Description of the reference numerals
1 optical fiber sensor, 2 vibrating motor, 3 lead screw, 4 environmental test case.
FIG. 1 is a schematic structural diagram of a testing apparatus according to the present invention;
Fig. 2 is a schematic structural diagram of the testing apparatus of the present invention.
Detailed Description
the following describes the present invention with reference to the accompanying drawings.
As shown in fig. 1-2, an optical fiber sensor tensile, compressive, vibratory and alternating damp-heat fatigue testing device comprises an optical fiber sensor 1, a tensile compressive stress generating device, a vibratory generating device, an environmental test chamber 4, an optical fiber sensing analyzer, a data acquisition system and a computer;
The tensile and compressive stress generating device is configured to provide tensile stress and compressive stress for the optical fiber sensor and comprises a servo motor, a servo motor driver, a PLC, a sliding guide rail, a sliding clamp, a screw rod 3, a fixing clamp and a stress sensor. A rotating shaft of the servo motor is connected with a screw rod 4 through a screw, and the screw rod 4 is connected with a sliding clamp; the servo motor driver is connected with the servo motor and the PLC through cables; two ends of the optical fiber sensor are respectively fixed by a sliding clamp and a fixing clamp; the sliding clamp and the fixing clamp are provided with grooves, and the grooves are used for leading out tail fibers of the optical fiber sensor.
the fixing clamp is fixed on one side of the guide rail through a screw; one end of the stress sensor is fixed on the base of the fixing clamp, and the other end of the stress sensor is connected with the optical fiber sensor clamp. The optical fiber sensor clamp is a mechanical part for fixing the optical fiber grating, and different customized clamps are adopted for the optical fiber gratings of different models.
The vibration generating device is configured to provide vibration stress to the optical fiber sensor and comprises a vibration motor and a servo motor driver; the vibration motor is connected with the servo motor driver through a cable, and the vibration motor is arranged below the optical fiber sensor and is tightly attached to the optical fiber sensor.
the environment test box provides an alternating damp and hot environment for the optical fiber sensor, namely provides temperature and humidity stress.
The optical fiber sensing analyzer acquires and measures the central wavelength of the optical fiber sensor, and simultaneously sends the measured data to the computer for storage.
The data acquisition system is used for acquiring temperature and humidity data and stress sensing data during the fatigue test period and sending the temperature and humidity data and the stress sensing data to the computer for processing. The fatigue test is one of reliability tests, and is used for testing the fatigue performance criterion of rubber, plastic samples or simulation machine parts subjected to alternating load under various environments and researching the fracture process of the rubber, plastic samples or simulation machine parts.
the testing device may provide one or more stresses, i.e. the testing device may provide tensile, compressive, vibrational, temperature and humidity stresses to the fibre optic sensor simultaneously or separately.
The data acquisition system comprises a data acquisition card and an electronic hygrothermograph, and the data acquisition card is connected with the stress sensor and the computer through data lines; the data acquisition system is used for recording temperature and humidity data and stress sensor data during fatigue testing, and consistency and repeatability (standard deviation of output data under the same condition) of the output data of the optical fiber sensor are used as testing evaluation indexes.
The PLC, the environmental test chamber and the electronic hygrothermograph are connected with a computer through data lines. A servo motor control program, a vibration motor control program, an environmental test box control program and a data acquisition control program are stored in the computer;
the servo motor control program and the vibration motor control program are used for sending regulation and control instructions to corresponding motors, the regulation and control instructions control and regulate tensile stress, compressive stress and vibration stress applied to the optical fiber sensor, and simultaneously the tensile stress, the compressive stress and the vibration stress application times, period and intensity are stored in a computer;
the environment test box control program is used for regulating and controlling the temperature and humidity stress of the environment test box on the optical fiber sensor;
and the data acquisition program is used for driving the data acquisition card to acquire and store the temperature and humidity data and the stress sensor data of the optical fiber sensor.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (9)
1. The device for testing the tension, compression, vibration and alternating damp-heat fatigue of the optical fiber sensor is characterized by comprising the optical fiber sensor, a tension-compression stress generating device, a vibration generating device, an environmental test box, an optical fiber sensing analyzer, a data acquisition system and a computer;
The tensile and compressive stress generating device is configured to provide tensile stress and compressive stress to the optical fiber sensor; the tensile compression stress generating device comprises a servo motor, a servo motor driver, a PLC, a sliding guide rail, a sliding clamp, a screw rod, a fixed clamp and a stress sensor, wherein a rotating shaft of the servo motor is connected with the screw rod through a screw, and the screw rod is connected with the sliding clamp; the servo motor driver is connected with the servo motor and the PLC through cables;
The vibration generating device comprises a vibration motor and a servo motor driver; the vibration motor is connected with the servo motor driver through a cable and is configured to provide vibration stress to the optical fiber sensor;
The environment test chamber provides an alternating damp and hot environment for the optical fiber sensor;
The optical fiber sensing analyzer acquires and measures the central wavelength of the optical fiber sensor, and simultaneously sends the measured data to the computer for storage;
the data acquisition system is used for acquiring temperature and humidity data and stress sensing data during a fatigue test period and sending the temperature and humidity data and the stress sensing data to the computer for processing;
the testing device can provide tensile stress, compressive stress, vibration stress, temperature and humidity stress to the optical fiber sensor simultaneously or respectively.
2. The test device of claim 1, wherein two ends of the optical fiber sensor are respectively fixed by a sliding clamp and a fixing clamp; the sliding clamp and the fixing clamp are provided with grooves, and the grooves are used for leading out tail fibers of the optical fiber sensor.
3. The test device of claim 2, wherein the fixture is fixed to one side of the rail by screws.
4. The test device of claim 1, wherein the strain sensor is fixed to the base of the fixture at one end and connected to the fiber sensor fixture at the other end.
5. The testing device of claim 1, wherein the data acquisition system comprises a data acquisition card and an electronic hygrothermograph, and the data acquisition card is connected with the stress sensor and the computer through data lines.
6. The testing device of claim 1, wherein the vibration motor is disposed below the optical fiber sensor and is disposed in close proximity to the optical fiber sensor.
7. The test device of claim 1, wherein the PLC, the environmental test chamber, and the electronic hygrothermograph are connected to a computer via data lines;
A servo motor control program, a vibration motor control program, an environmental test box control program and a data acquisition control program are stored in the computer.
8. the testing device of claim 7, wherein the servo motor control program and the vibration motor control program are used for sending control commands to the corresponding motors, the control commands control and regulate the tensile stress, the compressive stress and the vibration stress applied by the optical fiber sensor, and the tensile stress, the compressive stress and the vibration stress application times, periods and intensities are stored in the computer;
the environment test box control program is used for regulating and controlling the temperature and humidity stress of the environment test box on the optical fiber sensor;
and the data acquisition program is used for driving the data acquisition card to acquire and store the temperature and humidity data and the stress sensor data of the optical fiber sensor.
9. the testing device of claim 1, wherein the fiber sensing analyzer is an optical power meter or a spectrometer.
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| CN201920388229.5U CN209783627U (en) | 2019-03-25 | 2019-03-25 | tensile, compression, vibration and alternating damp-heat fatigue testing device for optical fiber sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031035A (en) * | 2019-03-25 | 2019-07-19 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Fibre optical sensor stretching, compression, vibration and Alternate hot and humid fatigue test device and its test method |
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2019
- 2019-03-25 CN CN201920388229.5U patent/CN209783627U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031035A (en) * | 2019-03-25 | 2019-07-19 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Fibre optical sensor stretching, compression, vibration and Alternate hot and humid fatigue test device and its test method |
| CN110031035B (en) * | 2019-03-25 | 2024-01-16 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Optical fiber sensor stretching, compressing, vibrating and alternating damp-heat fatigue testing device and testing method thereof |
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