Working point control system and method of sensor, computer equipment and readable storage medium

Abstract

The invention relates to a working point control system and method of a sensor, computer equipment and a readable storage medium. The system comprises a laser used for emitting light wave signals under a plurality of scanning frequencies under the condition that the working point of a sensor is in a non-linear working area; the sensor is used for performing electric field modulation on the light wave signals under the plurality of scanning frequencies, updating pre-acquired phase information based on each light wave signal after electric field modulation, and generating a light intensity signal under each scanning frequency based on each piece of updated phase information; the signal conversion module is used for converting the light intensity signal under each scanning frequency into an electric feedback signal; and the data processing module is used for iteratively detecting the target working frequency of the light wave signal emitted by the laser based on the electric feedback signal under each scanning frequency, and controlling the working point of the sensor to be in a linear working area based on the target working frequency. By adopting the method, the working point of the sensor can be accurately controlled.

Description

Technical Field

[0001] The present application relates to the field of power electronics technology, and in particular to an operating point control system, method, device, computer equipment, computer-readable storage medium and computer program product of a sensor. Background Art

[0002] As the application scope of sensors continues to expand, sensor processing technology has also become a popular technology in the field of power electronics. For example, taking an optical electric field sensor as an example, the optical electric field sensor can only achieve linear electric field detection when the working point is in the linear working area. However, this working point is easily disturbed by the physical characteristics of the sensor and drifts. Therefore, it is particularly important to control the working point of the sensor.

[0003] At present, the main technical means to control the working point of the sensor are to improve the stability of the working point by improving the process structure of the sensor, and to improve the stability of the working point by optimizing the physical characteristics of the sensor. However, the current working point control methods of these sensors still have the problem of inaccuracy. Summary of the invention

[0004] Based on this, it is necessary to provide an accurate sensor operating point control system, method, device, computer equipment, computer readable storage medium and computer program product to address the above technical problems.

[0005] In a first aspect, the present application provides a sensor operating point control method system, comprising:

[0006] A laser, used for emitting light wave signals at multiple scanning frequencies when the working point of the sensor is in a nonlinear working region, wherein the scanning frequencies are all within a target scanning frequency range;

[0007] A sensor, used for performing electric field modulation on light wave signals at multiple scanning frequencies, updating pre-acquired phase information based on each light wave signal after electric field modulation, and generating a light intensity signal at each scanning frequency based on each updated phase information, wherein the pre-acquired phase information is phase information of drift in the sensor when the working point of the sensor is in a nonlinear working area;

[0008] A signal conversion module, used for converting the light intensity signal at each scanning frequency into an electrical feedback signal;

[0009] The data processing module is used to iteratively detect the target operating frequency of the light wave signal emitted by the laser based on the electrical feedback signal at each scanning frequency, and control the operating point of the sensor to be in a linear operating area based on the target operating frequency.

[0010] In one embodiment, the data processing module is further configured to:

[0011] Frequency scanning step: based on the electrical feedback signal at each scanning frequency, detecting the electrical feedback signal difference corresponding to a plurality of adjacent scanning frequency ranges, wherein the adjacent scanning frequency range is a frequency range between two adjacent scanning frequencies within the target scanning frequency range;

[0012] Filter out a target adjacent frequency range with the largest electric feedback signal difference from all adjacent scanning frequency ranges, and update the target adjacent frequency range as the target scanning frequency range;

[0013] When the target scanning frequency range is greater than or equal to the preset frequency range threshold, a plurality of scanning frequencies newly generated under the target scanning frequency range are obtained, and the frequency scanning step is returned until the target scanning frequency range is less than the preset frequency range threshold;

[0014] Based on the latest target scanning frequency range, the target operating frequency of the laser emitting the light wave signal is detected, and the laser is controlled to emit the light wave signal of the target operating frequency to the sensor.

[0015] In one embodiment, the data processing module is further configured to:

[0016] Obtain the latest electrical feedback signal difference corresponding to each scanning frequency in the latest target scanning frequency range;

[0017] Determine a minimum electric feedback signal and a maximum electric feedback signal from the latest electric feedback signal difference, and detect an average electric feedback signal between the minimum electric feedback signal and the maximum electric feedback signal;

[0018] The target scanning frequency corresponding to the average electrical feedback signal is determined, and the target scanning frequency is used as the target operating frequency of the light wave signal emitted by the laser.

[0019] In one embodiment, the data processing module is further configured to:

[0020] Detecting a target operating wavelength corresponding to a target operating frequency;

[0021] When the laser is controlled to transmit a light wave signal with a target operating frequency and a target operating wavelength to the sensor, it is determined that the operating point of the sensor is in a linear operating region.

[0022] In one embodiment, the sensor is placed in an external electric field, and the sensor includes:

[0023] an antenna for applying an electric field voltage of the electric field to the electrode;

[0024] An electrode, used for generating a target electric field according to an electric field voltage, and applying the target electric field to the first waveguide arm;

[0025] The first waveguide arm is used to perform electric field modulation on the light wave signal at each scanning frequency based on the target electric field when transmitting the light wave signals at multiple scanning frequencies, so as to generate multiple light wave signals after electric field modulation;

[0026] A second waveguide arm is used to transmit optical wave signals at multiple scanning frequencies;

[0027] The output end is used to detect the phase difference between the light wave signal at each scanning frequency and the light wave signal after electric field modulation, and use the phase difference as the updated phase information.

[0028] In one embodiment, the signal conversion module includes:

[0029] A photoelectric conversion unit, used for converting the light intensity signal at each of the scanning frequencies into an analog current signal;

[0030] A voltage-current conversion and amplification unit, used for converting each of the analog current signals into an analog voltage signal, and amplifying a plurality of the analog voltage signals;

[0031] The digital-to-analog conversion unit is used to convert each amplified analog voltage signal into an electrical feedback signal.

[0032] In one embodiment, the system further comprises:

[0033] The coupler is used to proportionally decompose the light intensity signal at each scanning frequency and send a plurality of proportionally decomposed light intensity signals to the signal conversion module.

[0034] The working point control device of the above-mentioned sensor includes a laser, a sensor, a signal conversion module and a data processing module. When the working point of the sensor is in a nonlinear working area, the laser transmits light wave signals at multiple scanning frequencies to the sensor, wherein the scanning frequencies are all within the target scanning frequency range. The sensor performs electric field modulation on the light wave signals at multiple scanning frequencies, and based on the light wave signals after electric field modulation, compensates for the phase information that drifts in the sensor when the working point of the sensor is in the nonlinear working area, and generates a light intensity signal at each scanning frequency based on the updated phase information. The signal conversion module converts the light intensity signal at each scanning frequency into an electrical feedback signal. The data processing module accurately determines the target working frequency when the working point of the sensor is in the linear working area based on the electrical feedback signal at each scanning frequency through iterative means, and then controls the working point of the sensor to be in the linear working area based on the accurately compensated target working frequency, so that the working point of the sensor can be accurately and automatically reset when it deviates from the linear working area.

[0035] In a second aspect, the present application further provides a method for determining an operating point of a sensor, the method comprising:

[0036] When the working point of the sensor is in a nonlinear working region, light wave signals at multiple scanning frequencies are obtained, wherein the scanning frequencies are all within a target scanning frequency range;

[0037] Performing electric field modulation on the light wave signals at multiple scanning frequencies, and updating the pre-acquired phase information based on each light wave signal after the electric field modulation, wherein the pre-acquired phase information is the phase information of the sensor when the working point of the sensor is in the nonlinear working area;

[0038] Based on each updated phase information, a light intensity signal at each scanning frequency is generated, and the light intensity signal at each scanning frequency is converted into an electrical feedback signal, wherein the pre-acquired phase information is phase information of drift in the sensor when the operating point of the sensor is in a nonlinear working area;

[0039] Based on the electrical feedback signal at each scanning frequency, the target operating frequency of the optical wave signal emitted by the laser is iteratively detected, and based on the target operating frequency, the operating point of the sensor is controlled to be in a linear operating region.

[0040] In a third aspect, the present application further provides a device for determining an operating point of a sensor, the device comprising:

[0041] A signal transmitting module, used for acquiring light wave signals at multiple scanning frequencies when the working point of the sensor is in a nonlinear working area, wherein the scanning frequencies are all within a target scanning frequency range;

[0042] A signal modulation module, used to perform electric field modulation on the light wave signals at multiple scanning frequencies, and update the pre-acquired phase information based on each light wave signal after the electric field modulation, wherein the pre-acquired phase information is the phase information of the sensor when the working point of the sensor is in the nonlinear working area;

[0043] A conversion module, for generating a light intensity signal at each scanning frequency based on each updated phase information, and converting the light intensity signal at each scanning frequency into an electrical feedback signal, wherein the pre-acquired phase information is phase information of drift in the sensor when the operating point of the sensor is in a nonlinear working area;

[0044] The working point control module is used to iteratively detect the target working frequency of the light wave signal emitted by the laser based on the electrical feedback signal at each scanning frequency, and control the working point of the sensor to be in the linear working area based on the target working frequency.

[0045] In a fourth aspect, the present application further provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0046] When the working point of the sensor is in a nonlinear working region, light wave signals at multiple scanning frequencies are obtained, wherein the scanning frequencies are all within a target scanning frequency range;

[0047] Performing electric field modulation on the light wave signals at multiple scanning frequencies, and updating the pre-acquired phase information based on each light wave signal after the electric field modulation, wherein the pre-acquired phase information is the phase information of the sensor when the working point of the sensor is in the nonlinear working area;

[0048] Based on each updated phase information, a light intensity signal at each scanning frequency is generated, and the light intensity signal at each scanning frequency is converted into an electrical feedback signal, wherein the pre-acquired phase information is phase information of drift in the sensor when the operating point of the sensor is in a nonlinear working area;

[0049] Based on the electrical feedback signal at each scanning frequency, the target operating frequency of the optical wave signal emitted by the laser is iteratively detected, and based on the target operating frequency, the operating point of the sensor is controlled to be in a linear operating region.

[0050] In a fifth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the following steps are implemented:

[0051] When the working point of the sensor is in a nonlinear working region, light wave signals at multiple scanning frequencies are obtained, wherein the scanning frequencies are all within a target scanning frequency range;

[0052] Performing electric field modulation on the light wave signals at multiple scanning frequencies, and updating the pre-acquired phase information based on each light wave signal after the electric field modulation, wherein the pre-acquired phase information is the phase information of the sensor when the working point of the sensor is in the nonlinear working area;

[0053] Based on each updated phase information, a light intensity signal at each scanning frequency is generated, and the light intensity signal at each scanning frequency is converted into an electrical feedback signal, wherein the pre-acquired phase information is phase information of drift in the sensor when the operating point of the sensor is in a nonlinear working area;

[0054] Based on the electrical feedback signal at each scanning frequency, the target operating frequency of the optical wave signal emitted by the laser is iteratively detected, and based on the target operating frequency, the operating point of the sensor is controlled to be in a linear operating region.

[0055] In a sixth aspect, the present application further provides a computer program product, including a computer program, which implements the following steps when executed by a processor:

[0056] When the working point of the sensor is in a nonlinear working region, light wave signals at multiple scanning frequencies are acquired, wherein the scanning frequencies are all within a target scanning frequency range;

[0057] Performing electric field modulation on the light wave signals at multiple scanning frequencies, and updating the pre-acquired phase information based on each light wave signal after the electric field modulation, wherein the pre-acquired phase information is the phase information of the sensor when the working point of the sensor is in the nonlinear working area;

[0058] Based on each updated phase information, a light intensity signal at each scanning frequency is generated, and the light intensity signal at each scanning frequency is converted into an electrical feedback signal, wherein the pre-acquired phase information is phase information of drift in the sensor when the operating point of the sensor is in a nonlinear working area;

[0059] Based on the electrical feedback signal at each scanning frequency, the target operating frequency of the optical wave signal emitted by the laser is iteratively detected, and based on the target operating frequency, the operating point of the sensor is controlled to be in a linear operating region.

[0060] The operating point control method, device, computer equipment, computer-readable storage medium and computer program product of the above-mentioned sensor obtain light wave signals at multiple scanning frequencies when the operating point of the sensor is in a nonlinear operating area, wherein the scanning frequencies are all within the target scanning frequency range, and the light wave signals at the multiple scanning frequencies are subjected to electric field modulation. Based on the light wave signals after electric field modulation, the phase information that drifts in the sensor when the operating point of the sensor is in the nonlinear operating area is compensated, and based on the updated phase information, a light intensity signal at each scanning frequency is generated, and the light intensity signal at each scanning frequency is converted into an electrical feedback signal. Based on the electrical feedback signal at each scanning frequency, the target operating frequency when the operating point of the sensor is in the linear operating area is accurately determined by iterative means, and then based on the accurately compensated target operating frequency, the operating point of the sensor is controlled to be in the linear operating area, so that the operating point of the sensor can be accurately and automatically reset when it deviates from the linear operating area. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments of the present application or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0062] Figure 1 A structural block diagram of a working point control system of a sensor in one embodiment;

[0063] Figure 2 A schematic diagram of the structure of a sensor in one embodiment;

[0064] Figure 3 is a schematic diagram of the structure of a signal conversion module in one embodiment;

[0065] Figure 4 A schematic diagram of a time domain output waveform of a sensor at different working points in an embodiment;

[0066] Figure 5 A schematic diagram of the specific structure of a working point control system of a sensor in a detailed embodiment;

[0067] Figure 6 A diagram showing an application environment of a method for controlling a working point of a sensor in an embodiment;

[0068] Figure 7 A schematic flow chart of a method for controlling a working point of a sensor in one embodiment;

[0069] Figure 8 is a structural block diagram of a working point control device of a sensor in one embodiment;

[0070] Fig. 9 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0071] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are used to explain the present application and are not used to limit the present application.

[0072] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0073] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0074] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0075] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least a portion of an element” means a part or all of an element.

[0076] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0077] The sensor in this application is an optical electric field sensor. At present, the main technical means of the integrated optical electric field sensor is to utilize the electro-optical effect of lithium niobate crystal, load the spatial electric field signal to the modulation electrode through the antenna, load the electric field information between the waveguide arms, and use the electro-optical effect characteristics of lithium niobate crystal to make the light wave propagating in the waveguide subject to electric field modulation, and infer the electric field intensity by measuring the output light intensity. However, the sensor can only achieve linear detection at the linear working point, and this working point is easily disturbed by the physical characteristics of the sensor and drifts. External temperature changes will cause the pyroelectric effect of lithium niobate crystals to change the refractive index of the crystal, external light changes will cause photorefractive effect, and stress changes will cause elastic-light effect on the surface electrodes and buffer layers of the crystal, thereby changing the refractive index. When the external environment changes, the inherent optical path difference of the sensor is easy to change, leaving the linear working point, resulting in test distortion. However, the existing working point control scheme mainly improves the working point stability by improving the process structure and optimizing the physical properties. The actual power transmission and distribution lines of the power grid have unstable and uncertain complex environmental characteristics. Various scenarios such as ferromagnetic resonance, load shedding, line reclosing, short circuit faults, lightning strikes, gas-insulated substation faults, etc. are prone to generate high-frequency transient signals, leading to temperature rise, stress changes, and strong light exposure. Therefore, the integrated optical electric field sensor urgently needs a linear working point control technology with high precision and high stability that is resistant to environmental interference, can effectively cope with the automatic control of the working point of the optical electric field sensor in the complex line environment, realize the real-time perception of distributed signals at key nodes, and ensure the safe and transparent operation of the smart grid.

[0078] When the operating point of the sensor is in a nonlinear working area due to environmental changes, the phase in the sensor will also shift. In order to compensate for the inherent phase shift of the sensor caused by environmental changes and realize the operating point control of the optical electric field sensor, the present application provides the following sensor operating point control system.

[0079] In an exemplary embodiment, Figure 1As shown, the working point control system 1000 of the sensor includes a laser 100, a sensor 200, a signal conversion module 300 and a data processing module 400, wherein:

[0080] The laser 100 is used to emit light wave signals at multiple scanning frequencies when the working point of the sensor 200 is in a nonlinear working region, wherein the scanning frequencies are all within a target scanning frequency range;

[0081] The sensor 200 is used to perform electric field modulation on the light wave signals at multiple scanning frequencies, update the pre-acquired phase information based on each light wave signal after the electric field modulation, and generate the light intensity signal at each scanning frequency based on each updated phase information, wherein the pre-acquired phase information is the phase information of the drift in the sensor 200 when the working point of the sensor 200 is in the nonlinear working area;

[0082] A signal conversion module 300, used to convert the light intensity signal at each scanning frequency into an electrical feedback signal;

[0083] The data processing module 400 is used to iteratively detect the target operating frequency of the optical wave signal emitted by the laser 100 based on the electrical feedback signal at each scanning frequency, and control the operating point of the sensor 200 to be in the linear operating area based on the target operating frequency.

[0084] Specifically, the operating point control system 1000 of the sensor 200 of the present application includes a laser 100, a sensor 200, a signal conversion module 300 and a data processing module 400. The sensor 200 is generally an asymmetric MZI (Mach–Zehnder interferometer) electric field sensor.

[0085] The laser 100 can use a tunable laser. The laser 100 emits a wide-spectrum light source with a wavelength range of 1500nm to 1600nm, and transmits multiple light wave signals to the MZI electric field sensor 200 through a polarization-maintaining optical fiber, wherein the light wave signal is z-polarized light. The laser 100 module uses an RS232 interface to communicate with an MCU (Microcontroller Unit), and its output light wavelength and frequency can be tuned under the control of the MCU. Furthermore, the light wave signal emitted by the laser 100 is a group of light wave signals within the target scanning frequency range, and the scanning frequencies corresponding to each light wave signal may be different, but they are all within the target scanning frequency range. For example, a group of light wave signals are all light wave signals set according to a preset frequency interval.

[0086] The electric field measurement subject is an optical electric field sensor 200 based on an asymmetric MZI structure, which utilizes the electro-optical effect of lithium niobate (LiNbO3) crystal. When the external electric field changes, the refractive index of lithium niobate crystal to light is modulated by the electric field, and the phase of the optical signal changes. The change in the electric field intensity is inferred by measuring the change in the optical signal. Further, the sensor 200 performs electric field modulation on the light wave signals at multiple scanning frequencies, updates the pre-acquired phase information based on each light wave signal after electric field modulation, and generates a light intensity signal at each scanning frequency based on each updated phase information. The light intensity signal at each scanning frequency generated by the sensor 200 is sent to the signal conversion module 300.

[0087] The signal conversion module 300 converts the light intensity signal at each scanning frequency into an electrical feedback signal through a series of signal conversions of the light intensity signal, such as photoelectric conversion and digital-to-analog conversion, and sends each electrical feedback signal to the data processing module 400 .

[0088] The digital processing circuit includes a single-chip reset circuit, a program download and debugging circuit. The single-chip reset circuit is used for embedded control, and by realizing the frequency sweep output of the laser 100 module, the iterative method is used to detect the optimal operating frequency of the light wave signal emitted by the laser 100 based on the electrical feedback signal at each sweep frequency, and realize the operating point control of the electric field sensor 200.

[0089] The working point control device of the sensor comprises a laser 100, a sensor 200, a signal conversion module 300 and a data processing module 400. When the working point of the sensor 200 is in a nonlinear working area, the laser 100 transmits light wave signals at multiple scanning frequencies to the sensor 200, wherein the scanning frequencies are all within a target scanning frequency range. The sensor 200 performs electric field modulation on the light wave signals at the multiple scanning frequencies. Based on the light wave signals after the electric field modulation, the phase information that drifts in the sensor 200 when the working point of the sensor 200 is in the nonlinear working area is compensated, and based on the updated phase information, a light intensity signal at each scanning frequency is generated. The signal conversion module 300 converts the light intensity signal at each scanning frequency into an electrical feedback signal. The data processing module 400 accurately determines the target working frequency when the working point of the sensor 200 is in the linear working area through iteration based on the electrical feedback signal at each scanning frequency, and then controls the working point of the sensor 200 to be in the linear working area based on the accurately compensated target working frequency, so that the working point of the sensor 200 can be accurately and automatically reset when it deviates from the linear working area.

[0090] In an exemplary embodiment, the data processing module 400 is further configured to:

[0091] Frequency scanning step: based on the electrical feedback signal at each scanning frequency, detect the electrical feedback signal difference corresponding to multiple adjacent scanning frequency ranges, wherein the adjacent scanning frequency range is the frequency range between two adjacent scanning frequencies within the target scanning frequency range; select the target adjacent frequency range with the largest electrical feedback signal difference from all adjacent scanning frequency ranges, and update the target adjacent frequency range to the target scanning frequency range; when the target scanning frequency range is greater than or equal to the preset frequency range threshold, obtain multiple newly generated scanning frequencies under the target scanning frequency range, and return to the frequency scanning step until the target scanning frequency range is less than the preset frequency range threshold; based on the latest target scanning frequency range, detect the target operating frequency of the light wave signal emitted by the laser 100, and control the laser 100 to emit the light wave signal of the target operating frequency to the sensor 200.

[0092] The adjacent scanning frequency range is a frequency range between two adjacent scanning frequencies in the target scanning frequency range.

[0093] Specifically, there are multiple scanning frequencies in the target scanning frequency range, each scanning frequency has a certain frequency interval, and the frequency intervals between different scanning frequencies may be the same or different. All adjacent adjacent scanning frequency ranges are obtained from the target scanning frequency range.

[0094] Based on the electrical feedback signal at each scanning frequency, the electrical feedback signal differences corresponding to multiple adjacent scanning frequency ranges are detected. For example, when the adjacent scanning frequency range is (f1, f2), the electrical feedback signal E1 corresponding to the minimum scanning frequency f1 of the adjacent scanning frequency range and the electrical feedback signal E2 corresponding to the maximum scanning frequency f2 of the adjacent scanning frequency range are obtained, and based on the difference between the electrical feedback signal E2 and the electrical feedback signal E1, the electrical feedback signal difference corresponding to the adjacent scanning frequency range is obtained.

[0095] Based on the electrical feedback signal differences corresponding to all adjacent scanning frequency ranges, the target adjacent scanning frequency range corresponding to the maximum electrical feedback signal difference is detected. The target adjacent scanning frequency range is then used as a new target scanning frequency range to determine whether the target scanning frequency range is greater than or equal to a preset frequency range threshold. If the target scanning frequency range is greater than or equal to the preset frequency range threshold, multiple newly generated scanning frequencies under the target scanning frequency range are obtained, and the frequency scanning step is returned, i.e., the process of detecting the electrical feedback signal differences corresponding to multiple adjacent scanning frequency ranges based on the electrical feedback signal under each scanning frequency is repeated until the target scanning frequency range is less than the preset frequency range threshold in a certain cycle.

[0096] The target scanning frequency range that is less than the preset frequency range threshold at this time is taken as the latest target scanning frequency range, and based on the latest target scanning frequency range, the target operating frequency of the light wave signal emitted by the laser 100 is detected.

[0097] For example, the initial sweep wavelength range is set to 1500nm to 1600nm, and the target sweep frequency range is 187.5GHz to 200GHz. Select the frequency interval as A set of m frequencies , output and record the corresponding frequency of sensor 200 The output electrical feedback signal , calculate the difference in electrical feedback signals between adjacent frequency ranges . Compare and get the maximum electrical feedback signal difference ,right Frequency range Then perform frequency sweep sampling.

[0098] Select the frequency interval as A set of m frequencies , output and record the sensor 200 corresponding to the selected frequency again The output electrical feedback signal , calculate the difference in electrical feedback signals between adjacent frequency ranges And compare to get the maximum electrical feedback signal difference ,right Frequency range Again, select the frequency interval as A set of m frequencies.

[0099] Repeat the above steps until , record the frequency range at this time And corresponding telecommunications , take the average value of the electrical signal Corresponding frequency is the operating frequency , the frequency is the frequency that can provide a linear operating point, corresponding to the wavelength This is the wavelength that can provide a linear operating point.

[0100] In the above embodiment, by proposing a scheme of controlling the laser 100 to output a light wave signal through an iterative frequency sweep method so that the working point of the sensor 200 is in the linear working area, automatic tuning control can be achieved in an electric field measurement environment, ensuring that the sensor 200 has an automatic reset function when it deviates from the linear working point, and providing a solution for the optical electric field sensor 200 to solve the problem of unstable and uncontrollable linear working point.

[0101] In an exemplary embodiment, the data processing module 400 is further configured to:

[0102] Obtain the latest electrical feedback signal difference corresponding to each scanning frequency in the latest target scanning frequency range; determine the minimum electrical feedback signal and the maximum electrical feedback signal from the latest electrical feedback signal difference, and detect the average electrical feedback signal between the minimum electrical feedback signal and the maximum electrical feedback signal; determine the target scanning frequency corresponding to the average electrical feedback signal, and use the target scanning frequency as the target operating frequency of the light wave signal emitted by the laser 100.

[0103] Specifically, based on the latest target scanning frequency range, the target operating frequency of the light wave signal emitted by the laser 100 is detected. Since the latest target scanning frequency range is a range value, in order to determine the optimal operating frequency from the range value, the method adopted by the present application is to obtain the latest electrical feedback signal difference corresponding to each scanning frequency in the latest target scanning frequency range, and then determine the minimum electrical feedback signal and the maximum electrical feedback signal from the latest electrical feedback signal difference.

[0104] The minimum electrical feedback signal and the maximum electrical feedback signal are averaged to use the average value as the average electrical feedback signal of the light wave signal emitted by the laser 100, and the scanning frequency corresponding to the average electrical feedback signal is determined, and the scanning frequency is used as the target operating frequency of the light wave signal emitted by the laser 100. When the laser 100 emits a light wave signal at the target operating frequency, the operating point of the sensor 200 is in the linear operating area.

[0105] For example, let the latest target scanning frequency range be , the electrical feedback signal range corresponding to the target scanning frequency range is , take the average electrical feedback signal within the electrical feedback signal range The corresponding frequency is The target operating frequency of the optical wave signal emitted by the laser 100 The target operating frequency In order to provide a linear operating point frequency, the data processing module 400 controls the output frequency of the tunable laser 100 to be Polarized light is used to control the electric field sensor 200 to operate in a static working area.

[0106] In the above embodiment, by obtaining the electrical feedback signal difference corresponding to each scanning frequency in the latest target scanning frequency range, the average electrical feedback signal between the minimum electrical feedback signal and the maximum electrical feedback signal can be used as the electrical feedback signal corresponding to the optimal scanning frequency. At this time, the laser 100 emits a light wave signal at the optimal scanning frequency to accurately control the sensor 200 to operate in the static working area.

[0107] In an exemplary embodiment, the data processing module 400 is further configured to:

[0108] Detecting the target operating wavelength corresponding to the target operating frequency; and determining that the sensor 200 is at a linear operating point while controlling the laser 100 to transmit a light wave signal of the target operating frequency and the target operating wavelength to the sensor 200.

[0109] Specifically, the data processing module 400 can not only detect the target operating frequency of the light wave signal emitted by the laser 100, but also detect the target operating wavelength corresponding to the target operating frequency. By detecting the target operating wavelength corresponding to the target operating frequency, the laser 100 emits a light wave signal corresponding to the target operating frequency and the target operating wavelength to the sensor 200, thereby making the operating point of the sensor 200 in the linear working area, that is, the sensor 200 is at the linear working point.

[0110] Furthermore, the wavelength of the laser 100 With the operating frequency of , where c is the speed of light. Therefore, by obtaining the target operating frequency and the speed of light, the target operating wavelength corresponding to the target operating frequency can be accurately detected.

[0111] In the above embodiment, by detecting the target operating wavelength corresponding to the target operating frequency, the laser 100 can be controlled to transmit a light wave signal of the target operating frequency and the target operating wavelength to the sensor 200 to accurately control the operating point of the sensor 200.

[0112] In an exemplary embodiment, Figure 2 As shown, the sensor 200 is placed in an external electric field, and the sensor 200 includes:

[0113] Antenna 210, for applying the electric field voltage of the electric field to electrode 220;

[0114] The electrode 220 is used to generate a target electric field according to the electric field voltage, and apply the target electric field to the first waveguide arm 230;

[0115] The first waveguide arm 230 is used to perform electric field modulation on the light wave signal at each scanning frequency based on the target electric field when transmitting the light wave signals at multiple scanning frequencies, so as to generate multiple light wave signals after electric field modulation;

[0116] The second waveguide arm 240 is used to transmit optical wave signals at multiple scanning frequencies;

[0117] The output terminal 250 is used to detect the phase difference between the light wave signal at each scanning frequency and the light wave signal after electric field modulation, and use the phase difference as updated phase information.

[0118] Specifically, a schematic diagram of the surface of an optical electric field sensor 200 is shown, and the sensor 200 mainly comprises a waveguide arm, an electrode 220 , an antenna 210 and an output end 250 .

[0119] This application uses an x-cut, y-transmitting lithium niobate crystal, and constructs two optical waveguide arms with an inherent phase difference on the z+ surface based on the proton exchange method. The polarized light is modulated by the electric field when passing through the waveguide arms. It needs to be explained that the X crystal axis is perpendicular to the wafer surface, so it is "X-cut". If the angle φ between the z axis and the Y axis is 0°, the waveguide propagates along the Y axis, which is called "Y-transmitting". Together, it is "X-cut, Y-transmitting".

[0120] The antenna 210 is generally a dipole antenna, and the electrode 220 is generally a metal electrode. The function of the dipole antenna is to load the electric field in the form of voltage onto the metal electrode 220, and generate an electric field between the metal electrodes 220 and apply it to one of the waveguide arms. Since there are two waveguide arms, one of which is applied with an electric field and the other is not applied with an electric field, a phase difference will be generated in the transmission of the light wave signals in the two waveguide arms. The phase difference between the light wave signals carries the electric field frequency information, and they converge and interfere at the waveguide output end 250, converting the optical phase difference into optical intensity information.

[0121] Taking the electrode 220 applying the target electric field to the first waveguide arm 230 as an example, when transmitting light wave signals at multiple scanning frequencies, the first waveguide arm 230 performs electric field modulation on the light wave signal at each scanning frequency based on the target electric field to generate multiple light wave signals after electric field modulation, and the second waveguide arm 240 directly transmits the light wave signals at multiple scanning frequencies. At the output end 250, the light wave signal at each scanning frequency merges and interferes with the light wave signal after electric field modulation. Based on the phase difference between the two signals, the phase information of the drift in the sensor 200 when the working point of the sensor 200 is in the nonlinear working area is updated, and then for each scanning frequency, the phase difference between the two signals is converted into a light intensity signal.

[0122] In the above embodiment, by setting up two waveguide arms and applying an electric field to one of the waveguide arms to perform electric field modulation on the light wave signal transmitted therein, the light wave signal at the same scanning frequency can produce a phase difference when transmitted between the two waveguide arms, and then based on the phase difference, the light intensity signal at each scanning frequency can be accurately generated.

[0123] In an exemplary embodiment, Figure 3 As shown, the signal conversion module 300 includes:

[0124] The photoelectric conversion unit 320 is used to convert the light intensity signal at each scanning frequency into an analog current signal;

[0125] The voltage-current conversion and amplification unit 340 is used to convert each analog current signal into an analog voltage signal and amplify multiple analog voltage signals;

[0126] The digital-to-analog conversion unit 360 is used to convert each amplified analog voltage signal into an electrical feedback signal.

[0127] Specifically, the signal conversion module 300 includes a photoelectric conversion unit 320 , a voltage-current conversion and amplification unit 340 340 , and a digital-to-analog conversion unit 360 .

[0128] The photoelectric conversion unit 320 is used to receive the light intensity signals at multiple scanning frequencies output by the sensor 200, and perform photoelectric conversion on the light intensity signals. The photoelectric conversion unit 320 is generally a photodiode, such as an indium gallium arsenide (InGaAs) photodiode. The indium gallium arsenide (InGaAs) photodiode completes the photoelectric conversion of the output light with a wavelength in the range of 1500-1600nm, outputs an analog current signal at each scanning frequency, and the analog current signal is a weak electrical signal, and transmits the analog current signals at multiple scanning frequencies to the voltage-current conversion amplifier unit 340.

[0129] The analog current signals at multiple scanning frequencies are converted into voltage and current by the voltage-to-current conversion and amplification unit 340 to generate analog voltage signals at each scanning frequency, and multiple analog voltage signals are amplified and frequency-selected to a measurable range, so that the analog voltage signals can be measured more clearly. In addition, each amplified analog voltage signal can be output to the filtering unit 380, which can be a first-order low-pass filter, to filter each amplified analog voltage signal, and send the filtered analog voltage signal to the digital-to-analog conversion unit 360.

[0130] Subsequently, the analog voltage signal after filtering is digitally sampled and outputted through the digital-to-analog conversion unit 360, and a feedback voltage signal is outputted to enter the data processing module 400 for processing and calculation.

[0131] In the above embodiment, by setting up three conversion modules including a photoelectric conversion unit 320, a voltage-current conversion and amplification unit 340, and a digital-to-analog conversion unit 360, the light intensity signal is converted from a light signal into an analog current signal, and then from an analog current signal into an analog voltage signal, and then the analog voltage is converted into an analog signal to obtain an electrical feedback signal. The amplification function in the voltage-current conversion and amplification unit 340 can also effectively amplify multiple analog voltage signals to avoid the weak analog voltage signal from being unable to be detected.

[0132] In an exemplary embodiment, the operating point control system of the sensor 200 further includes:

[0133] The coupler is used to proportionally decompose the light intensity signal at each scanning frequency and send a plurality of proportionally decomposed light intensity signals to the signal conversion module 300 .

[0134] Specifically, the coupler in the present application is generally a 1:9 coupler, which is used to decompose the output light intensity signal transmitted via a single-mode optical fiber. The 1:9 coupler decomposes the output light signal into two parts, 10% and 90%. Among them, 90% of the light intensity is normally extracted by the photoelectric detection module for electrical signal extraction and reverse calculation of the electric field to be measured, and the remaining 10% of the light signal is used as a feedback signal to control the linear operating point of the sensor 200. This 10% of the light signal is input into the photoelectric conversion unit 320 and converted into an analog current signal.

[0135] In the above embodiment, a coupler is provided to proportionally decompose the light intensity signal at each scanning frequency, and a small amount of light intensity signal is used as a feedback signal, thereby reducing the workload and improving the operating point control efficiency of the sensor 200.

[0136] In an exemplary embodiment, the theoretical analysis of the operating point control of the sensor 200 is as follows:

[0137] First, the optical electric field sensor 200 uses the linear follow-up relationship between the output photocurrent and the electric field strength to be measured to achieve accurate restoration of the electric field strength to be measured. Assume that the electric field strength to be measured of the input electric field sensor 200 is:

[0138]

[0139] When light waves pass through lithium niobate waveguides, they are modulated by the electric field, producing a phase difference. It can be expressed as:

[0140]

[0141] in, is the electric field modulation phase difference, is the inherent phase difference of the sensor 200. is the half-wave electric field of the sensor 200. The light waves in the two waveguide arms converge and interfere at the output end 250, converting the light phase difference into light intensity difference. The total light field output by the sensor 200 is:

[0142]

[0143] If and only if the inherent phase difference of sensor 200 or (m is an odd number), the total light field output by the sensor 200 is and the photoelectric flow after photoelectric conversion Bessel expansion can be done:

[0144]

[0145] At this time, the photocurrent only contains the odd harmonic information of the electric field to be measured. Since δ<<1, the third and higher harmonic signals can be ignored, so the electrical signal after the photoelectric conversion of the photodetector can be rewritten as:

[0146]

[0147] The inherent phase difference is When the photocurrent signal and the electric field strength to be measured form a linear function relationship, the electric field strength can be detected linearly without distortion. At this time, the sensor 200 is said to work at the linear point. However, the working point of the sensor 200 is easily affected by the external environment and drifts. Changes in temperature, stress, light and other conditions will cause the inherent phase difference of the sensor 200. Leave the move , thus affecting the test accuracy.

[0148] The present invention realizes the working point control of the integrated optical electric field sensor 200 through MCU iterative frequency modulation. First, the MZI of the electric field sensor 200 is designed to have an arm length difference of Due to the interference of external environmental variables and the inherent arm length difference of the MZI waveguide , the intrinsic phase difference of the optical waveguide itself becomes:

[0149]

[0150] The output light intensity expression of the sensor 200 becomes:

[0151]

[0152] Where λ is the working wavelength of the sensor 200, is the effective refractive index of the optical waveguide, is the inherent arm length difference of the design. The phase difference change caused by the change of the external environment is the unknown amount of drift of the working point of the sensor 200. By tuning the wavelength, the wavelength of the sensor 200 is changed. , compensating for the phase difference change caused by environmental changes, so that the inherent optical phase difference of the electric field sensor 200 Meet the sensor 200 linear working point conditions (m is an odd number), the sensor 200 returns to the linear working condition. At this time, the working wavelength of the sensor 200 is , there is a linear relationship between the output electric field of the sensor 200 and the actual electric field to be measured.

[0153] Known laser wavelength 100 With the operating frequency of , the output light intensity expression of sensor 200 becomes:

[0154]

[0155] Sensor 200 output optical power With frequency There is a cosine change relationship, as shown in Figure (b) - Curve, by controlling the laser frequency 100 The complete cosine curve can be scanned. The time domain output waveform of the sensor at different working points is as follows: Figure 4 As shown, Figure (a) is the waveform when the sensor works at the maximum point, Figure (b) is the waveform when the sensor works at the linear point, and Figure (c) is the waveform when the sensor works at the minimum point.

[0156] If and only if (m is an odd number), there is a linear following relationship between the measured voltage of the sensor 200 and the measured voltage. At this time, the inherent optical path difference expression of the sensor 200 is expressed as:

[0157]

[0158] The wavelength can be obtained from It is expressed as:

[0159]

[0160] Operating frequency It is expressed as:

[0161]

[0162] At this time, the sensor 200 works at the position in Figure (b), the light intensity change rate is the largest, and the corresponding frequency is the target operating frequency when the sensor 200 works in the linear region. From the previous analysis, it is known that the output light intensity of the optical electric field sensor 200 has a cosine relationship with the frequency. The operating frequency of the sensor 200 is controlled by the cosine function-based tuning method. , compensating for the inherent phase drift of the optical electric field sensor 200 caused by environmental changes, and realizing the working point control of the optical electric field sensor 200.

[0163] In an exemplary embodiment, Figure 5 As shown, the working point control system of the sensor includes a laser 100, a sensor 200, a signal conversion module 300, a data processing module 400 and a coupler 500 which are connected in sequence.

[0164] The sensor 200 further includes an antenna 210 , an electrode 220 , a first waveguide arm 230 , a second waveguide arm 240 , and an output end 250 .

[0165] The signal conversion module 300 further includes a photoelectric conversion unit 320 , a voltage-current conversion and amplification unit 340 , and a digital-to-analog conversion unit 360 .

[0166] The functions of the various structures in the working point control system of the sensor 200 include:

[0167] The laser 100 is used to emit light wave signals at multiple scanning frequencies when the working point of the sensor 200 is in a nonlinear working region, wherein the scanning frequencies are all within a target scanning frequency range;

[0168] The antenna 210 is used to load the electric field voltage of the electric field onto the electrode 220; the electrode 220 is used to generate a target electric field according to the electric field voltage, and apply the target electric field to the first waveguide arm 230; the first waveguide arm 230 is used to perform electric field modulation on the light wave signal at each scanning frequency based on the target electric field when transmitting light wave signals at multiple scanning frequencies, so as to generate multiple light wave signals after electric field modulation; the second waveguide arm 240 is used to transmit light wave signals at multiple scanning frequencies; the output end 250 is used to detect the phase difference between the light wave signal at each scanning frequency and the light wave signal after electric field modulation, and use the phase difference as updated phase information, and generate a light intensity signal at each scanning frequency based on each updated phase information, wherein the pre-acquired phase information is the phase information of the drift in the sensor 200 when the working point of the sensor 200 is in the nonlinear working area.

[0169] The coupler 500 is used to proportionally decompose the light intensity signal at each scanning frequency, and send a plurality of proportionally decomposed light intensity signals to the signal conversion module 300 .

[0170] The photoelectric conversion unit 320 is used to convert the light intensity signal at each scanning frequency into an analog current signal; the voltage-current conversion and amplification unit 340 is used to convert each analog current signal into an analog voltage signal and amplify multiple analog voltage signals; the digital-to-analog conversion unit 360 is used to convert each amplified analog voltage signal into an electrical feedback signal.

[0171] The data processing module 400 is used for the frequency scanning step: based on the electrical feedback signal at each scanning frequency, detecting the electrical feedback signal difference corresponding to a plurality of adjacent scanning frequency ranges, wherein the adjacent scanning frequency range is a frequency range between two adjacent scanning frequencies within the target scanning frequency range; screening out the target adjacent frequency range with the largest electrical feedback signal difference from all adjacent scanning frequency ranges, and updating the target adjacent frequency range to the target scanning frequency range; when the target scanning frequency range is greater than or equal to a preset frequency range threshold, obtaining a plurality of newly generated scanning frequencies under the target scanning frequency range, and returning to the frequency scanning step until the target scanning frequency range is less than the preset frequency range threshold. frequency range threshold; obtaining the latest electrical feedback signal difference corresponding to each scanning frequency in the latest target scanning frequency range; determining the minimum electrical feedback signal and the maximum electrical feedback signal from the latest electrical feedback signal difference, and detecting the average electrical feedback signal between the first electrical feedback signal and the second electrical feedback signal; determining the target scanning frequency corresponding to the average electrical feedback signal, and using the target scanning frequency as the target operating frequency of the optical wave signal emitted by the laser 100, and detecting the target operating wavelength corresponding to the target operating frequency; determining that the operating point of the sensor 200 is in the linear operating area when controlling the laser 100 to emit the optical wave signal of the target operating frequency and the target operating wavelength to the sensor 200.

[0172] The working point control method of the sensor 200 provided in the embodiment of the present application can be applied to Figure 6 In the application environment shown, the controller 102 communicates with the working point control system 1000 of the sensor 200 through a network. The working point control system 1000 of the sensor 200 includes a laser 100, a sensor 200, a signal conversion module 300 and a data processing module 400.

[0173] When the working point of the sensor 200 is in the nonlinear working area, the controller controls the working point control system 1000 of the sensor 200 to emit light wave signals at multiple scanning frequencies, wherein the scanning frequencies are all within the target scanning frequency range; obtain light wave signals at multiple scanning frequencies, wherein the scanning frequencies are all within the target scanning frequency range; perform electric field modulation on the light wave signals at the multiple scanning frequencies, and update the pre-acquired phase information based on each light wave signal after electric field modulation, wherein the pre-acquired phase information is the phase information of the sensor 200 when the working point of the sensor 200 is in the nonlinear working area; based on each updated phase information, generate a light intensity signal at each scanning frequency, and convert the light intensity signal at each scanning frequency into an electrical feedback signal, wherein the pre-acquired phase information is the phase information of the drift in the sensor 200 when the working point of the sensor 200 is in the nonlinear working area; based on the electrical feedback signal at each scanning frequency, iteratively detect the target working frequency of the light wave signal emitted by the laser 100, and control the working point of the sensor 200 to be in the linear working area based on the target working frequency.

[0174] In an exemplary embodiment, Figure 7 As shown, a method for determining the working point of a sensor is provided, and the method is applied to a controller as an example for explanation.

[0175] S100, when the working point of the sensor 200 is in a nonlinear working region, light wave signals at multiple scanning frequencies are acquired.

[0176] S200, performing electric field modulation on light wave signals at multiple scanning frequencies, and updating pre-acquired phase information based on each light wave signal after electric field modulation.

[0177] S300, based on each updated phase information, generating a light intensity signal at each scanning frequency, and converting the light intensity signal at each scanning frequency into an electrical feedback signal.

[0178] S400, based on the electrical feedback signal at each scanning frequency, iteratively detect the target operating frequency of the optical wave signal emitted by the laser 100, and based on the target operating frequency, control the operating point of the sensor 200 to be in the linear operating region.

[0179] Among them, the scanning frequencies are all within the target scanning frequency range, the pre-acquired phase information is the phase information of the sensor 200 when the working point of the sensor 200 is in the nonlinear working area, and the pre-acquired phase information is the phase information of the drift in the sensor 200 when the working point of the sensor 200 is in the nonlinear working area.

[0180] Specifically, the operating point control system of the sensor 200 includes a laser 100, a sensor 200, a coupler 500, a signal conversion module 300, and a data processing module 400 connected in sequence. The sensor 200 also includes an antenna 210, an electrode 220, a first waveguide arm 230, a second waveguide arm 240, and an output end 250. The signal conversion module 300 also includes a photoelectric conversion unit 320, a voltage-current conversion and amplification unit 340, and a digital-to-analog conversion unit 360.

[0181] The optical electric field sensor 200 is placed in the electric field. When the working point of the sensor 200 is in the nonlinear working area, the laser 100 is controlled to emit light wave signals at multiple scanning frequencies, wherein the scanning frequencies are all within the target scanning frequency range, and the electric field voltage of the electric field is loaded onto the electrode 220, and the electrode 220 is used to generate a target electric field according to the electric field voltage, and apply the target electric field to the first waveguide arm 230; when the first waveguide transmits light wave signals at multiple scanning frequencies, based on the target electric field, the light wave signal at each scanning frequency is subjected to electric field modulation to generate multiple light wave signals after electric field modulation; the second waveguide arm 240 transmits light wave signals at multiple scanning frequencies; the output end 250 detects the phase difference between the light wave signal at each scanning frequency and the light wave signal after electric field modulation, and uses the phase difference as updated phase information, and generates a light intensity signal at each scanning frequency based on each updated phase information, wherein the pre-acquired phase information is the phase information of drift in the sensor 200 when the working point of the sensor 200 is in the nonlinear working area.

[0182] Next, the control coupler 500 performs proportional decomposition on the light intensity signal at each scanning frequency, and sends a plurality of proportionally decomposed light intensity signals to the signal conversion module 300 .

[0183] The controller also controls the photoelectric conversion unit 320 to convert the light intensity signal at each scanning frequency into an analog current signal; the voltage-current conversion and amplification unit 340 converts each analog current signal into an analog voltage signal and amplifies multiple analog voltage signals; the digital-to-analog conversion unit 360 converts each amplified analog voltage signal into an electrical feedback signal.

[0184] Finally, the control data processing module 400 performs a frequency sweeping step, which includes detecting the electrical feedback signal differences corresponding to a plurality of adjacent scanning frequency ranges based on the electrical feedback signal at each scanning frequency, wherein the adjacent scanning frequency range is a frequency range between two adjacent scanning frequencies within the target scanning frequency range; selecting a target adjacent frequency range with the largest electrical feedback signal difference from all adjacent scanning frequency ranges, and updating the target adjacent frequency range to the target scanning frequency range; when the target scanning frequency range is greater than or equal to a preset frequency range threshold, obtaining a plurality of newly generated scanning frequencies under the target scanning frequency range, and returning to the frequency sweeping step until the target scanning frequency range is reached. The range is less than a preset frequency range threshold; the latest electrical feedback signal difference corresponding to each scanning frequency in the latest target scanning frequency range is obtained; the minimum electrical feedback signal and the maximum electrical feedback signal are determined from the latest electrical feedback signal difference, and the average electrical feedback signal between the first electrical feedback signal and the second electrical feedback signal is detected; the target scanning frequency corresponding to the average electrical feedback signal is determined, and the target scanning frequency is used as the target operating frequency of the optical wave signal emitted by the laser 100, and the target operating wavelength corresponding to the target operating frequency is detected; when the laser 100 is controlled to emit the optical wave signal of the target operating frequency and the target operating wavelength to the sensor 200, it is determined that the operating point of the sensor 200 is in the linear operating area.

[0185] In the working point control method of the above-mentioned sensor 200, when the working point of the sensor 200 is in the nonlinear working area, light wave signals at multiple scanning frequencies are obtained, wherein the scanning frequencies are all within the target scanning frequency range, and the light wave signals at the multiple scanning frequencies are subjected to electric field modulation. Based on the light wave signals after the electric field modulation, the phase information that drifts in the sensor 200 when the working point of the sensor 200 is in the nonlinear working area is compensated, and based on the updated phase information, a light intensity signal at each scanning frequency is generated, and the light intensity signal at each scanning frequency is converted into an electrical feedback signal. Based on the electrical feedback signal at each scanning frequency, the target working frequency when the working point of the sensor 200 is in the linear working area is accurately determined by iterative means, and then based on the accurately compensated target working frequency, the working point of the sensor 200 is controlled to be in the linear working area, so that the working point of the sensor 200 can be accurately and automatically reset even when it deviates from the linear working area.

[0186] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0187] Based on the same inventive concept, the embodiment of the present application also provides a sensor operating point determination device for implementing the sensor operating point determination method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in the embodiments of the one or more sensor operating point determination devices provided below can refer to the limitations of the sensor operating point determination method above, and will not be repeated here.

[0188] In an exemplary embodiment, Figure 8 As shown, a device for determining a working point of a sensor is provided, comprising: a signal transmitting module 710, a signal modulating module 720, a conversion module 730 and a working point control module 740, wherein:

[0189] The signal transmitting module 710 is used to obtain light wave signals at multiple scanning frequencies when the working point of the sensor 200 is in the nonlinear working area, wherein the scanning frequencies are all within the target scanning frequency range;

[0190] The signal modulation module 720 is used to perform electric field modulation on the optical wave signals at multiple scanning frequencies, and update the pre-acquired phase information based on each optical wave signal after the electric field modulation, wherein the pre-acquired phase information is the phase information of the sensor 200 when the working point of the sensor 200 is in the nonlinear working area;

[0191] A conversion module 730, for generating a light intensity signal at each scanning frequency based on each updated phase information, and converting the light intensity signal at each scanning frequency into an electrical feedback signal, wherein the pre-acquired phase information is phase information of drift in the sensor 200 when the working point of the sensor 200 is in a nonlinear working area;

[0192] The working point control module 740 is used to iteratively detect the target working frequency of the optical wave signal emitted by the laser 100 based on the electrical feedback signal at each scanning frequency, and control the working point of the sensor 200 to be in the linear working area based on the target working frequency.

[0193] Each module in the working point determination device of the sensor can be implemented in whole or in part by software, hardware or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module.

[0194] In an exemplary embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as shown in FIG. Fig. 9 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data such as light wave signals. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for determining the working point of a sensor is implemented.

[0195] Those skilled in the art will understand that Fig. 9 The structure shown in the figure is a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0196] In one embodiment, a computer device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above method embodiments when executing the computer program.

[0197] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0198] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0199] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0200] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0201] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0202] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A sensor operating point control system, characterized in that: The system comprises: A laser, used for emitting light wave signals at multiple scanning frequencies when the working point of the sensor is in a nonlinear working region, wherein the scanning frequencies are all within a target scanning frequency range; A sensor, used for performing electric field modulation on the light wave signals at the plurality of scanning frequencies, updating the pre-acquired phase information based on each light wave signal after the electric field modulation, and generating the light intensity signal at each scanning frequency based on each updated phase information, wherein the pre-acquired phase information is the phase information of the drift in the sensor when the working point of the sensor is in the nonlinear working area; A signal conversion module, used for converting the light intensity signal at each scanning frequency into an electrical feedback signal; The data processing module is used to iteratively detect the target operating frequency of the light wave signal emitted by the laser based on the electrical feedback signal at each scanning frequency, and control the operating point of the sensor to be in a linear operating area based on the target operating frequency.

2. The system according to claim 1, characterized in that The data processing module is also used for: A frequency scanning step: based on the electrical feedback signal at each of the scanning frequencies, detecting electrical feedback signal differences corresponding to a plurality of adjacent scanning frequency ranges, wherein the adjacent scanning frequency range is a frequency range between two adjacent scanning frequencies within the target scanning frequency range; Filter out the target adjacent frequency range with the largest electrical feedback signal difference from all the adjacent scanning frequency ranges, and update the target adjacent frequency range as the target scanning frequency range; When the target scanning frequency range is greater than or equal to the preset frequency range threshold, a plurality of scanning frequencies newly generated under the target scanning frequency range are acquired, and the frequency scanning step is returned until the target scanning frequency range is less than the preset frequency range threshold; Based on the latest target scanning frequency range, the target operating frequency of the light wave signal emitted by the laser is detected, and the laser is controlled to emit the light wave signal of the target operating frequency to the sensor.

3. The system according to claim 2, characterized in that The data processing module is also used for: Obtaining the latest electrical feedback signal difference corresponding to each scanning frequency in the latest target scanning frequency range; Determining a minimum electrical feedback signal and a maximum electrical feedback signal from the latest electrical feedback signal difference, and detecting an average electrical feedback signal between the minimum electrical feedback signal and the maximum electrical feedback signal; A target scanning frequency corresponding to the average electrical feedback signal is determined, and the target scanning frequency is used as a target operating frequency of the light wave signal emitted by the laser.

4. The system according to claim 1, characterized in that The data processing module is also used for: Detecting a target operating wavelength corresponding to the target operating frequency; When the laser is controlled to transmit the optical wave signal of the target operating frequency and the target operating wavelength to the sensor, it is determined that the operating point of the sensor is in the linear operating region.

5. The system according to claim 1, characterized in that The sensor is placed in an external electric field, and the sensor includes: an antenna, for applying an electric field voltage of the electric field to an electrode; an electrode, for generating a target electric field according to the electric field voltage, and applying the target electric field to the first waveguide arm; The first waveguide arm is used to perform electric field modulation on each light wave signal at the scanning frequency based on the target electric field when transmitting the light wave signals at the scanning frequencies, so as to generate a plurality of light wave signals after electric field modulation; A second waveguide arm, used for transmitting a plurality of optical wave signals at the scanning frequencies; The output end is used to detect the phase difference between the light wave signal at each of the scanning frequencies and the light wave signal after electric field modulation, and use the phase difference as updated phase information.

6. The system according to claim 1, characterized in that The signal conversion module comprises: A photoelectric conversion unit, used for converting the light intensity signal at each of the scanning frequencies into an analog current signal; A voltage-current conversion and amplification unit, used for converting each of the analog current signals into an analog voltage signal, and amplifying a plurality of the analog voltage signals; The digital-to-analog conversion unit is used to convert each amplified analog voltage signal into an electrical feedback signal.

7. The system according to claim 1, characterized in that The system further comprises: The coupler is used to proportionally decompose the light intensity signal at each scanning frequency and send a plurality of proportionally decomposed light intensity signals to the signal conversion module.

8. A method for determining the operating point of a sensor, characterized in that: The method comprises: When the working point of the sensor is in a nonlinear working region, light wave signals at multiple scanning frequencies are acquired, wherein the scanning frequencies are all within a target scanning frequency range; Performing electric field modulation on the light wave signals at the plurality of scanning frequencies, and updating the pre-acquired phase information based on each light wave signal after the electric field modulation, wherein the pre-acquired phase information is the phase information of the sensor when the working point of the sensor is in the nonlinear working area; Based on each updated phase information, a light intensity signal at each scanning frequency is generated, and the light intensity signal at each scanning frequency is converted into an electrical feedback signal, wherein the pre-acquired phase information is phase information of drift in the sensor when the operating point of the sensor is in a nonlinear working area; Based on the electrical feedback signal at each of the scanning frequencies, the target operating frequency of the optical wave signal emitted by the laser is iteratively detected, and based on the target operating frequency, the operating point of the sensor is controlled to be in a linear operating region.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to claim 8 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to claim 8 are implemented.

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