Method, equipment, and medium for detecting deviations in elevator operation status based on lithium niobate waveguide optical modulator

Abstract

A method, device, and medium for detecting deviations in elevator operating status based on a lithium niobate waveguide optical modulator are disclosed, relating to the field of elevator safety technology. During elevator operation, the electro-optic modulator modulates an optical signal, and by analyzing and processing the modulated optical signal, high-precision detection of elevator operating status deviations is achieved, and the data is uploaded to the elevator black box in real time, thus ensuring the safe operation of the elevator.

Description

Technical Field

[0001] This invention relates to the field of elevator safety technology, specifically to a method for detecting deviations in elevator operating status based on a lithium niobate waveguide optical modulator. Background Technology

[0002] With the continuous breakthroughs in urban construction height, elevators, as vertical bridges connecting the clouds and the ground, have their operating height becoming a key indicator for evaluating elevator performance and safety. Traditional elevator operation status monitoring primarily relies on communication protocols with the elevator control system, which suffers from poor versatility and susceptibility to electromagnetic interference, increasing the likelihood of safety accidents. Therefore, improving the accuracy, timeliness, and interference resistance of elevator operation status deviation detection is of great significance. Summary of the Invention

[0003] In order to overcome the shortcomings of the above technologies, this invention provides a method for detecting deviations in elevator operating status based on a lithium niobate waveguide optical modulator, which solves the problems of poor versatility and weak anti-interference ability in traditional elevator operating status detection.

[0004] The technical solution adopted by this invention to overcome its technical problems is: A method for detecting deviations in elevator operating status based on a lithium niobate waveguide optical modulator includes: S1. Collect electrical signals from sensors during elevator operation; S2. Generates a linearly polarized light signal; S3. Modulate the sensor's electrical signal into an optical signal so that the optical signal carries the elevator's operating status information. S4. Modulate the optical signal carrying elevator operating status information into an electrical signal; S5. Preprocess the modulated electrical signal; S6. Extract feature parameters based on the preprocessed electrical signal; S7. Compare the characteristic parameters with the characteristic parameters when the elevator is running normally, and compare the difference after comparison with the deviation threshold. If it is greater than the deviation threshold, trigger the elevator's preset warning protection.

[0005] Furthermore, step S2 includes the following steps: S21. Current is supplied to the LED through a DC drive circuit, and the LED emits light; S22. The light emitted by the light-emitting diode is polarized and converted into linearly polarized light.

[0006] In step S3, the electrical and optical signals from the sensor are input into the lithium niobate waveguide optical modulator, and an optical signal carrying elevator operating status information is output.

[0007] Furthermore, in step S4, the optical signal carrying the elevator operating status information is input into the photodetector to modulate the optical signal into an electrical signal.

[0008] Furthermore, step S5 includes the following steps: S51. Input the modulated electrical signal into the amplifier circuit to amplify the electrical signal; S52. Input the amplified electrical signal into the filter circuit to filter the electrical signal; S53. Normalize the filtered electrical signal to obtain the preprocessed electrical signal.

[0009] Furthermore, in step S6, feature parameters are extracted from the preprocessed electrical signal using a wavelet transform algorithm.

[0010] Furthermore, in step S7, the difference between the feature parameters and the feature parameters when the elevator is running normally is uploaded to the elevator black box.

[0011] The present invention also relates to a computer-readable storage medium having a computer program stored thereon, the computer program being implemented when executed by a processor: Collect electrical signals from sensors during elevator operation; Generates linearly polarized light signals; The electrical signal from the sensor is converted into an optical signal and modulated so that the optical signal carries the electrical signal information of the elevator's operating status. The optical signal carrying elevator operating status information is modulated into an electrical signal; Preprocess the modulated electrical signal; Feature parameters are extracted from the preprocessed electrical signal; The characteristic parameters are compared with those during normal elevator operation. The difference is then compared with a deviation threshold. If the difference exceeds the deviation threshold, the elevator's preset warning protection is triggered.

[0012] This invention also relates to a deviation detection device for elevator operating status based on a lithium niobate waveguide optical modulator, comprising: The data acquisition module is used to collect electrical signals from sensors during elevator operation. The optical signal generation module is used to generate optical signals of linearly polarized light; The electro-optic modulation module is used to convert the electrical signal of the sensor into a modulated optical signal, so that the optical signal carries the electrical signal of the elevator's operating status information. A photodetector is used to modulate an optical signal carrying information about the elevator's operating status into an electrical signal. The data processing module is used to preprocess the modulated electrical signal; The wavelet transform algorithm module is used to extract feature parameters from the preprocessed electrical signal; The deviation detection module is used to compare the characteristic parameters with the characteristic parameters when the elevator is running normally, and compare the difference after comparison with the deviation threshold. If it is greater than the deviation threshold, the elevator's preset warning protection is triggered.

[0013] The beneficial effects of this invention are: 1) High precision: By modulating the optical signal using a lithium niobate waveguide photoelectric modulator and combining it with advanced signal processing algorithms, high-precision detection of the elevator's operating status can be achieved. This method is far more accurate than traditional methods and can more accurately reflect the actual operating status of the elevator.

[0014] 2) Strong anti-interference capability: Because optical signals are used as the transmission medium, the method of this invention has strong anti-interference capability. Compared with traditional electrical signal transmission methods, optical signals are less affected by electromagnetic interference, thereby improving the stability and reliability of the elevator system.

[0015] 3) Real-time performance: The method of this invention has high timeliness. Once a deviation is detected, it immediately records the operating status data and deviation data, and responds immediately, uploading the data to the elevator black box and triggering the corresponding protection measures of the system. This helps to promptly detect and handle problems during elevator operation, providing a guarantee for the safe operation of the elevator.

[0016] 4) Speed: By rapidly analyzing and processing the modulated optical signal, the method of the present invention can complete a large amount of data processing in a short time, quickly respond to changes in the elevator's operating status, and improve detection efficiency. Attached Figure Description

[0017] Figure 1 This is a system structure diagram of the present invention; Figure 2 This is a flowchart of the optical signal processing method of the present invention. Detailed Implementation

[0018] The following is in conjunction with the appendix Figure 1 Appendix Figure 2 The present invention will be further described below.

[0019] Example 1 A method for detecting deviations in elevator operating status based on a lithium niobate waveguide optical modulator includes: S1. Collect electrical signals from sensors during elevator operation.

[0020] S2. Generates a linearly polarized light signal.

[0021] S3. The electrical signal from the sensor is converted into an optical signal and modulated so that the optical signal carries the electrical signal of the elevator's operating status information.

[0022] S4. Modulate the optical signal carrying elevator operating status information into an electrical signal.

[0023] S5. Preprocess the modulated electrical signal.

[0024] S6. Extract feature parameters from the preprocessed electrical signal.

[0025] S7. Compare the characteristic parameters with the characteristic parameters when the elevator is running normally, and compare the difference after comparison with the deviation threshold. If it is greater than the deviation threshold, the elevator's preset early warning protection will be triggered, providing strong protection for the safe operation of the elevator.

[0026] It solves the problems of poor versatility and weak anti-interference ability in traditional elevator operation status detection.

[0027] In this embodiment, step S2 includes the following steps: S21. Current is supplied to the light-emitting diode (LED) through a DC drive circuit, and the LED emits high-brightness natural light; S22. The light emitted by the light-emitting diode is polarized and converted into linearly polarized light, which serves as a stable and ideal modulation light source for the subsequent electro-optic modulator.

[0028] In this embodiment, in step S3, the electrical and optical signals of the sensor are input into the lithium niobate waveguide optical modulator, and an optical signal carrying elevator operating status information is output.

[0029] In this embodiment, in step S4, the optical signal carrying elevator operating status information is input into the photodetector to modulate the optical signal into an electrical signal.

[0030] In this embodiment, step S5 includes the following steps: S51. Input the modulated electrical signal into the amplifier circuit to amplify the electrical signal; S52. Input the amplified electrical signal into the filter circuit to filter the electrical signal; S53. Normalize the filtered electrical signal to obtain the preprocessed electrical signal.

[0031] In this embodiment, step S6 extracts feature parameters from the preprocessed electrical signal using a wavelet transform algorithm. Specifically, the wavelet transform algorithm involves: first, selecting a suitable wavelet basis function based on the electrical signal information; then, performing an inner product operation between the signal and the wavelet basis function to obtain a series of wavelet coefficients, representing the frequency and positional features of the signal; finally, scaling or shifting the wavelet basis function by changing its scaling factor to capture the frequency changes of the signal at different times; and finally, extracting feature parameters based on the obtained wavelet coefficients, and further performing dimensionality reduction, filtering, feature vector construction, smoothing filtering, and validity verification on the feature parameters. The wavelet transform algorithm is existing technology and will not be elaborated further here.

[0032] In this embodiment, in step S7, the difference between the feature parameters and the feature parameters when the elevator is running normally is uploaded to the elevator black box.

[0033] Example 2 A computer-readable storage medium having a computer program stored thereon, the computer program being implemented when executed by a processor: Collect electrical signals from sensors during elevator operation.

[0034] Generates linearly polarized light signals.

[0035] The electrical signal from the sensor is converted into an optical signal and modulated so that the optical signal carries the electrical signal information of the elevator's operating status.

[0036] The optical signal carrying elevator operating status information is modulated into an electrical signal.

[0037] The modulated electrical signal is preprocessed.

[0038] Feature parameters are extracted from the preprocessed electrical signal.

[0039] The characteristic parameters are compared with those during normal elevator operation. The difference is then compared with a deviation threshold. If the difference exceeds the deviation threshold, the elevator's preset warning protection is triggered.

[0040] Example 3 A deviation detection device for elevator operating status based on a lithium niobate waveguide optical modulator, comprising: The data acquisition module is used to collect electrical signals from sensors during elevator operation. The optical signal generation module is used to generate linearly polarized light signals. The electro-optic modulation module is used to convert the electrical signal from the sensor into a modulated optical signal, so that the optical signal carries the electrical signal of the elevator's operating status information.

[0041] A photodetector is used to modulate an optical signal carrying information about the elevator's operating status into an electrical signal.

[0042] The data processing module is used to preprocess the modulated electrical signal.

[0043] The wavelet transform algorithm module is used to extract feature parameters from the preprocessed electrical signal.

[0044] The deviation detection module is used to compare the characteristic parameters with the characteristic parameters when the elevator is running normally, and compare the difference after comparison with the deviation threshold. If it is greater than the deviation threshold, the elevator's preset warning protection is triggered.

[0045] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for detecting deviations in elevator operating status based on a lithium niobate waveguide optical modulator, characterized in that, include: S1. Collect electrical signals from sensors during elevator operation; S2. Generates a linearly polarized light signal; S3. Modulate the sensor's electrical signal into an optical signal so that the optical signal carries the elevator's operating status information. S4. Modulate the optical signal carrying elevator operating status information into an electrical signal; S5. Preprocess the modulated electrical signal; S6. Extract feature parameters based on the preprocessed electrical signal; S7. Compare the characteristic parameters with the characteristic parameters when the elevator is running normally, and compare the difference after comparison with the deviation threshold. If it is greater than the deviation threshold, trigger the elevator's preset warning protection.

2. The method for detecting deviations in elevator operating status based on a lithium niobate waveguide optical modulator according to claim 1, characterized in that, Step S2 includes the following steps: S21. Current is supplied to the LED through a DC drive circuit, and the LED emits light; S22. The light emitted by the light-emitting diode is polarized and converted into linearly polarized light.

3. The method for detecting deviations in elevator operating status based on a lithium niobate waveguide optical modulator according to claim 1, characterized in that: In step S3, the electrical and optical signals from the sensor are input into the lithium niobate waveguide optical modulator, and an optical signal carrying elevator operating status information is output.

4. The method for detecting deviations in elevator operating status based on a lithium niobate waveguide optical modulator according to claim 1, characterized in that: In step S4, the optical signal carrying the elevator's operating status information is input into the photodetector to modulate the optical signal into an electrical signal.

5. The method for detecting deviations in elevator operating status based on a lithium niobate waveguide optical modulator according to claim 1, characterized in that, Step S5 includes the following steps: S51. Input the modulated electrical signal into the amplifier circuit to amplify the electrical signal; S52. Input the amplified electrical signal into the filter circuit to filter the electrical signal; S53. Normalize the filtered electrical signal to obtain the preprocessed electrical signal.

6. The method for detecting deviations in elevator operating status based on a lithium niobate waveguide optical modulator according to claim 1, characterized in that: In step S6, feature parameters are extracted from the preprocessed electrical signal using a wavelet transform algorithm.

7. The method for detecting deviations in elevator operating status based on a lithium niobate waveguide optical modulator according to claim 1, characterized in that: In step S7, the difference between the characteristic parameters and the characteristic parameters when the elevator is running normally is uploaded to the elevator black box.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that is implemented when executed by a processor: Collect electrical signals from sensors during elevator operation; Generates linearly polarized light signals; The electrical signal from the sensor is converted into an optical signal and modulated so that the optical signal carries the electrical signal information of the elevator's operating status. The optical signal carrying elevator operating status information is modulated into an electrical signal; Preprocess the modulated electrical signal; Feature parameters are extracted from the preprocessed electrical signal; The characteristic parameters are compared with those during normal elevator operation. The difference is then compared with a deviation threshold. If the difference exceeds the deviation threshold, the elevator's preset warning protection is triggered.

9. A deviation detection device for elevator operating status based on a lithium niobate waveguide optical modulator, characterized in that, include: The data acquisition module is used to collect electrical signals from sensors during elevator operation. The optical signal generation module is used to generate linearly polarized light signals. The electro-optic modulation module is used to convert the electrical signal of the sensor into a modulated optical signal, so that the optical signal carries the electrical signal of the elevator's operating status information. A photodetector is used to modulate an optical signal carrying information about the elevator's operating status into an electrical signal. The data processing module is used to preprocess the modulated electrical signal; The wavelet transform algorithm module is used to extract feature parameters from the preprocessed electrical signal; The deviation detection module is used to compare the characteristic parameters with the characteristic parameters when the elevator is running normally, and compare the difference after comparison with the deviation threshold. If it is greater than the deviation threshold, the elevator's preset warning protection is triggered.

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