Structural motion time measurement and verification method based on high-precision optical fiber sensor
By arranging high-precision fiber optic sensors and oscilloscopes at the starting and end points of the slider and combining them with electrical signal comparison, the accuracy and cost issues of slider movement time measurement in the existing technology are solved, and efficient and low-cost accurate time measurement and calibration are achieved.
Patent Information
- Application Number
- CN202510799391.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-16
- Publication Date
- 2025-10-21
AI Technical Summary
The existing technology has low accuracy and high cost when measuring the movement time of the slider after the pin is pulled out. It cannot meet the accuracy requirement of less than 0.01s, and the operation is cumbersome and cannot be effectively calibrated.
High-precision fiber optic sensors and oscilloscopes are used in conjunction with calibration tooling. Laser fiber optic sensors are placed at the starting and end points of the slider, and the slider movement time is calculated in conjunction with the oscilloscope. The electrical signal changes of the fiber optic sensor and the oscilloscope are used for synchronous comparison to ensure timing accuracy.
It achieves high-precision (no more than 0.01s) timing results, is simple to operate, low cost, and has an effective calibration method, which improves the reliability and efficiency of timing measurement.
Smart Images
Figure CN120821179A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of sensor testing, and relates to a structural motion timing and calibration method based on a high-precision optical fiber sensor. Background Art
[0002] When testing the movement time of a slider after pin removal, there are currently two methods for measuring time: visual measurement and conventional sensors, with the pin removal as the starting point (electrical signal) and the impact vibration generated when the slider reaches the end point as the end point. For precise timing, such as less than 0.01s, conventional visual cameras cannot meet these requirements. Professional high-speed photography is required, which is expensive and requires specialized personnel. The preparation process is cumbersome, time-consuming, and costly. Conventional sensors also suffer from low accuracy. Calibration is not possible with either method. Summary of the Invention
[0003] (1) Purpose of the invention
[0004] The purpose of the present invention is to complete the timing detection of products with a method that is easy and fast to operate, highly efficient and precise, and with intuitive display of result numbers, thereby improving work efficiency, improving test accuracy, and making it convenient for operators to intuitively interpret test results.
[0005] (2) Technical solution
[0006] In order to solve the above technical problems, the present invention provides a structural motion timing and calibration method based on high-precision fiber optic sensors. The method process is as follows: first, a laser fiber optic sensor is arranged at the starting position and the end position of the slider of the product structure to be measured, and the two laser fiber optic sensors detect the starting signal of the slider at the starting point and the end signal when it reaches the end point, and calculate the slider movement time; then, the slider is subjected to a sliding test in a calibration fixture, and the sliding time is measured using an oscilloscope to verify the accuracy of the laser fiber optic sensor timing.
[0007] Furthermore, in the structure of the product being tested, the slider is positioned by a pin. When the pin is pulled out, the slider leaves the starting point under the action of the spring and slides to the end point to stop; the laser fiber optic sensor collects the time difference ΔT0 between the start signal and the end signal, the slider starting position detects the starting time point t0, and the slider slides to the end position to detect the time point t1, and the slider running time ΔT0 = t1-t0 is calculated.
[0008] Furthermore, the laser fiber sensor contacts extend to the starting and ending positions of the slider to detect the movement of the slider and identify the starting and arrival time points of the slider.
[0009] Furthermore, the laser fiber sensor is an active fiber device formed by a fiber sensor and a fiber amplifier.
[0010] Furthermore, the laser fiber sensor is a JX-S41N-F sensor.
[0011] Furthermore, the performance parameters of the laser fiber sensor are:
[0012] Response time: t≤500μs;
[0013] Measuring distance: 33mm~150mm;
[0014] Ambient temperature: -20℃ to +55℃;
[0015] Vibration resistance: 10 to 55 Hz, double amplitude 1.5 mm, 2 hours each in X, Y, and Z directions;
[0016] Impact resistance: 500m / s2, 3 times each in X, Y and Z directions.
[0017] Furthermore, the calibration tooling is externally connected to a 9V battery, the positive pole of the battery is connected to the tooling time mechanism, the two probe tips of the oscilloscope are respectively connected to the starting shell and the end shell of the slider slide of the tooling, and the negative pole of the battery is connected to the oscilloscope probe clip. When the slider leaves the starting point or reaches the end point, a 9V voltage drop is generated in the two channels. The voltage waveform changes of the two channels are collected by the oscilloscope, and the measurement data of the laser fiber optic sensor are compared to determine the timing accuracy.
[0018] Furthermore, the test probe of the oscilloscope is a hook with spring support, which enables the probe to be firmly connected to the test point. The test probe clip is located below the test probe and is used to accurately contact the signal point of the circuit under test.
[0019] Furthermore, in the calibration tooling, the test lead clips of the two test leads of the oscilloscope are simultaneously clamped on the negative terminal of the battery, the probes of the two test leads are respectively connected to the starting shell and the end shell of the slider channel on the tooling, the positive pole of the battery is connected to the tooling, and the slider is connected to the starting shell at the initial position on the tooling. When the slider reaches the end of the slide after movement, it contacts the end shell; when the slider leaves the starting point and reaches the end point, there is a voltage drop of 9V on the two channels respectively. The time between the two voltage drops is calculated through the voltage waveform displayed on the oscilloscope screen. This time is the time when the slider leaves the starting point and reaches the end point.
[0020] (3) Beneficial effects
[0021] The above technical solution provides a structural motion timing and verification method based on high-precision optical fiber sensors. The timing method is easy to operate and does not require professional personnel. The product can be placed on the device for measurement. The timing accuracy is high (no more than 0.01s) and an effective calibration method is provided to verify the timing results. The cost is low, the design is simplified, and the reliability of use is improved. The timing work of a single product is less than 3 seconds, and the efficiency is extremely high. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 Schematic diagram of the timing method in an embodiment of the present invention.
[0023] Figure 2 Schematic diagram of the calibration tooling used in the calibration method in an embodiment of the present invention. DETAILED DESCRIPTION
[0024] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below with reference to the accompanying drawings and examples.
[0025] like Figure 1 As shown, the process of the structural motion timing and calibration method based on high-precision optical fiber sensors in this embodiment is as follows: first, a laser optical fiber sensor is arranged at the starting position and the end position of the slider, and the two laser optical fiber sensors detect the starting signal of the slider at the starting point and the end signal when it reaches the end point, and calculate the slider movement time; next, the slider is subjected to a sliding test in the calibration fixture, and the sliding time is measured using an oscilloscope to verify the accuracy of the laser optical fiber sensor timing.
[0026] In this embodiment, in the structure of the product being tested, the slider is positioned by a pin. When the pin is pulled out, the slider leaves the starting point under the action of the spring and slides to the end point to stop; the laser fiber optic sensor collects the time difference ΔT0 between the start signal and the end signal, the slider starting position detects the starting time point t0, and the slider slides to the end point position to detect the time point t1, and the slider running time ΔT0 = t1-t0 is calculated.
[0027] To accurately capture the slider's movements and ensure detection accuracy, the laser fiber sensor's contact is extended to the slider's starting point to detect its movement. This allows for more precise identification of the slider's start time. The laser fiber sensor utilizes a high-precision fiber optic sensor in conjunction with a fiber optic amplifier. This fiber optic sensor and amplifier form a new type of active fiber optic device, characterized by high conversion efficiency, low laser threshold, compact size, and flexibility. It also features multiple laser output spectral lines, excellent monochromaticity, and a wide tuning range.
[0028] This example uses the JX-S41N-F sensor, with the following main technical parameters:
[0029] Response time: t≤500μs
[0030] Measuring distance: 33mm~150mm
[0031] Ambient temperature: -20℃ to +55℃ (no freezing)
[0032] Vibration resistance: 10 to 55 Hz, double amplitude 1.5 mm, 2 hours each in X, Y, and Z directions
[0033] Impact resistance: 500m / s2, 3 times each in X, Y and Z directions.
[0034] Proving the accuracy of this system's test data is also a major challenge. Testing of the same product and the same time structure revealed that the time data obtained slowly increased with the number of tests. This suggests that to verify the data's accuracy, other methods would be necessary to test the product simultaneously.
[0035] Because the accuracy and response speed of this timing mechanism are relatively high, it was decided to use the electrical signal method to synchronously compare the data. After testing, the timing mechanism and the qualified oscilloscope after verification were finally used to measure the time of the calibration tooling at the same time, and the difference between the two was compared. Through theoretical calculation, it was found that the difference was no more than 0.01s, which means it passed the verification.
[0036] This embodiment designs a time measuring tool, such as Figure 2 As shown, an external 9V battery is connected, with the positive terminal of the battery connected to the tooling timing mechanism. The tips of the two oscilloscope probes are respectively connected to the starting and ending housings of the tooling, and the negative terminal of the battery is connected to the oscilloscope probe clip. When the slider leaves the starting point or reaches the end point, a 9V voltage drop occurs between the two channels. By using the oscilloscope to collect the voltage waveform changes of the two channels, we can compare the sensor measurement data and thus ensure the measurement accuracy of the equipment.
[0037] Test lead structure: The oscilloscope test lead probe is a spring-supported hook that allows the probe to be firmly connected to the test point. The test lead clip is located under the test lead probe and is used to accurately contact the signal point of the circuit under test.
[0038] The tooling and the object under test work together: The test lead clips of both test leads are simultaneously clamped to the negative terminal of the battery. The probes of both test leads are connected to the starting and ending housings of the slider channel on the tooling, respectively. The positive terminal of the battery is connected to the tooling. The slider is connected to the starting housing at its initial position on the tooling. When the slider reaches the end of the slide, it contacts the end housing. Therefore, when the slider leaves the starting point and reaches the end point, a 9V voltage drop occurs on both channels. The voltage waveform displayed on the oscilloscope screen can be clearly calculated to determine the time between these two voltage drops. This time is the time between the slider leaving the starting point and reaching the end point.
[0039] The two measurement methods use different power supplies and measure the product at the same time, which ensures the authenticity and reliability of the comparison data.
[0040] The specific comparison results are shown in Table 1:
[0041] Table 1 Comparative test record of timing mechanism
[0042]
[0043] A large amount of test data has been used for testing during the equipment debugging process. The above test data is the test data during the acceptance of the equipment. There are two devices and four workstations in total. Each workstation tested 4 sets of data. Through data comparison, it can be seen that the error between the data obtained by the timing system and the data on the oscilloscope is no more than ±0.01s, indicating that the measurement method adopted by this timing system has high measurement accuracy and the timing data is accurate.
[0044] As can be seen from the above technical solution, the timing measurement and verification method of the present invention uses two groups of high-precision optical fiber sensors and optical fiber amplifiers to monitor the starting point and end point respectively, with fast sampling speed, small test error and high accuracy; this timing method has an effective calibration method to verify the timing results, and has high working reliability.
[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.
Claims
1. A method for timing and verifying structural motion based on a high-precision optical fiber sensor, characterized in that: The method process is as follows: first, a laser fiber optic sensor is arranged at the starting position and the end position of the slider of the product structure to be tested. The two laser fiber optic sensors detect the starting signal of the slider at the starting point and the ending signal when it reaches the end point, and calculate the slider movement time; then, the slider is subjected to a sliding test in the calibration fixture, and the sliding time is measured using an oscilloscope to verify the accuracy of the laser fiber optic sensor's timing measurement.
2. The method for timing and verifying structural motion based on a high-precision optical fiber sensor according to claim 1, characterized in that: In the structure of the product being tested, the slider is positioned by a pin. When the pin is pulled out, the slider leaves the starting point under the action of the spring and slides to the end point to stop. The laser fiber optic sensor collects the time difference ΔT0 between the start signal and the end signal. The slider starting position detects the starting time point t0, and the slider slides to the end position to detect the time point t1. The slider running time ΔT0 = t1-t0 is calculated.
3. The method for timing and verifying structural motion based on a high-precision optical fiber sensor according to claim 2, wherein: The laser fiber sensor contacts extend to the starting and ending positions of the slider to detect the movement of the slider and identify the starting and arrival time points of the slider.
4. The method for timing and verifying structural motion based on a high-precision optical fiber sensor according to claim 3, wherein: The laser fiber sensor is an active fiber device formed by a fiber sensor and a fiber amplifier.
5. The method for timing and verifying structural motion based on a high-precision optical fiber sensor according to claim 4, characterized in that: The laser fiber sensor is a JX-S41N-F sensor.
6. The method for timing and verifying structural motion based on a high-precision optical fiber sensor according to claim 5, characterized in that: The performance parameters of the laser fiber sensor are: Response time: t≤500μs; Measuring distance: 33mm~150mm; Ambient temperature: -20℃ to +55℃; Vibration resistance: 10 to 55 Hz, double amplitude 1.5 mm, 2 hours each in X, Y, and Z directions; Impact resistance: 500m / s2, 3 times each in X, Y and Z directions.
7. The method for timing and verifying structural motion based on a high-precision optical fiber sensor according to claim 6, wherein: The calibration tooling is externally connected to a 9V battery, the positive pole of the battery is connected to the tooling time mechanism, the two probe tips of the oscilloscope are respectively connected to the starting point shell and the end point shell of the slider slide of the tooling, and the negative pole of the battery is connected to the oscilloscope probe clip. When the slider leaves the starting point or reaches the end point, a 9V voltage drop is generated in the two channels. The voltage waveform changes of the two channels are collected by the oscilloscope, and the measurement data of the laser fiber optic sensor are compared to determine the timing accuracy.
8. The method for timing and verifying structural motion based on a high-precision optical fiber sensor according to claim 7, wherein: The test probe of the oscilloscope is a hook with spring support, which enables the probe to be firmly connected to the test point. The test probe clip is located under the test probe and is used to accurately contact the signal point of the circuit under test.
9. The method for timing and verifying structural motion based on a high-precision optical fiber sensor according to claim 8, wherein: In the calibration tooling, the test lead clips of the two test leads of the oscilloscope are simultaneously clamped on the negative terminal of the battery, and the probes of the two test leads are respectively connected to the starting shell and the end shell of the slider channel on the tooling. The positive pole of the battery is connected to the tooling, and the slider is connected to the starting shell at the initial position on the tooling. When the slider reaches the end of the slide after movement, it contacts the end shell; when the slider leaves the starting point and reaches the end point, there is a 9V voltage drop on the two channels respectively. The time between the two voltage drops is calculated through the voltage waveform displayed on the oscilloscope screen. This time is the time when the slider leaves the starting point and reaches the end point.
10. Application of the motion timing and calibration method according to any one of claims 1 to 9 in the field of sensor testing technology.