CN-121977617-A - Physical quantity measuring method, device, apparatus, storage medium, and program product

CN121977617ACN 121977617 ACN121977617 ACN 121977617ACN-121977617-A

Abstract

The application discloses a physical quantity measuring method, a device, equipment, a storage medium and a program product, which relate to the technical field of physical measurement and comprise the steps of generating a first terahertz frequency comb and a second terahertz frequency comb; the method comprises the steps of setting a first tooth space between frequency teeth of a first terahertz frequency comb and a second tooth space between frequency teeth of a second terahertz frequency comb, setting the second tooth space between the frequency teeth of the second terahertz frequency comb as a fixed value, modulating the first tooth space between the frequency teeth of the first terahertz frequency comb by using a physical quantity to be measured, carrying out beam combining interference on the modulated first terahertz frequency comb and the modulated second terahertz frequency comb, detecting an alignment signal in a beam combining interference signal, wherein the alignment signal is generated by the difference between the first tooth space and the second tooth space, and calculating a measured value of the physical quantity to be measured according to the periodic change of the alignment signal. The vernier amplification effect based on the double terahertz frequency comb can realize high-precision, high-stability, non-contact and high-dynamic range measurement of physical quantity, and solve the systematic bottleneck of the traditional measurement mode in measurement performance.

Inventors

NI XIAOSHENG
YU XIONGBIN
HAN FEIFAN
HE JUN
HU CHANGJIE
ZOU LONGHAO
LI WEICHAO
TAO XIAOFENG

Assignees

鹏城实验室

Dates

Publication Date: 20260505
Application Date: 20260128

Claims (10)

1. A physical quantity measuring method, characterized by comprising: generating a first terahertz frequency comb and a second terahertz frequency comb, wherein the second tooth spacing of the frequency teeth of the second terahertz frequency comb is a fixed value; Modulating the first tooth space of the frequency teeth of the first terahertz frequency comb by using a physical quantity to be detected; carrying out beam combining interference on the modulated first terahertz frequency comb and the modulated second terahertz frequency comb, and detecting an alignment signal in a beam combining interference signal, wherein the alignment signal is generated by the difference between the first tooth spacing and the second tooth spacing; And calculating the measured value of the physical quantity to be measured according to the periodic variation of the alignment signal.
2. The physical quantity measuring method according to claim 1, wherein the step of calculating the measured value of the physical quantity to be measured from the periodic variation of the alignment signal includes: counting the occurrence times of the alignment signal in the beam combining interference signal in a preset frequency range according to the periodical change of the alignment signal; and carrying out physical quantity inversion processing based on the occurrence times to obtain the measured value of the physical quantity to be measured.
3. The physical quantity measuring method according to claim 2, wherein the step of performing physical quantity inversion processing based on the occurrence number to obtain the measured value of the physical quantity to be measured includes: Calculating a pitch difference between the modulated first tooth pitch and the second tooth pitch based on the occurrence number and the second tooth pitch; and mapping the interval difference according to the corresponding relation between the interval difference and the physical quantity to be measured to obtain the measured value of the physical quantity to be measured.
4. The physical quantity measuring method according to claim 2, wherein the step of counting the number of occurrences of the alignment signal in the beam-combining interference signal in a preset frequency range according to the periodic variation of the alignment signal further comprises: And under the condition that the occurrence frequency exceeds a preset threshold value, adjusting the first tooth spacing and/or the second tooth spacing through feedback to adjust an initial spacing difference between the first tooth spacing and the second tooth spacing, wherein the initial spacing difference is used for defining the measurement performance of the physical quantity to be measured.
5. The physical quantity measuring method according to any one of claims 1 to 4, wherein the step of modulating the first tooth space of the frequency teeth of the first terahertz frequency comb with the physical quantity to be measured includes: converting the physical quantity to be measured into a modulation signal; And linearly modulating the first tooth space of the frequency teeth of the first terahertz frequency comb by utilizing the modulation signal.
6. The physical quantity measuring method according to any one of claims 1 to 4, wherein the step of detecting an alignment signal in the combined beam interference signal includes: The beam combining interference signal is matched with a characteristic signal waveform, wherein the characteristic signal waveform is a signal waveform when the first terahertz frequency comb is aligned with the second terahertz frequency comb teeth; and detecting an alignment signal in the beam combining interference signal according to the matching result.
7. A physical quantity measuring apparatus, characterized by comprising: the frequency comb generating module is used for generating a first terahertz frequency comb and a second terahertz frequency comb; The signal conversion module is used for modulating the first tooth space of the frequency teeth of the first terahertz frequency comb by utilizing the physical quantity to be detected; the alignment detection module is used for carrying out beam combining interference on the modulated first terahertz frequency comb and the modulated second terahertz frequency comb and detecting an alignment signal in a beam combining interference signal, wherein the alignment signal is generated by the difference between the first tooth spacing and the second tooth spacing, and the second tooth spacing is the tooth spacing of frequency teeth of the second terahertz frequency comb; And the inversion module is used for calculating the measured value of the physical quantity to be measured according to the periodic change of the alignment signal.
8. A physical quantity measuring apparatus, characterized in that the apparatus comprises a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program being configured to implement the steps of the physical quantity measuring method according to any one of claims 1 to 6.
9. A storage medium, characterized in that the storage medium is a computer-readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, realizes the steps of the physical quantity measuring method according to any one of claims 1 to 6.
10. A computer program product, characterized in that the computer program product comprises a computer program which, when being executed by a processor, realizes the steps of the physical quantity measuring method according to any one of claims 1 to 6.

Description

Physical quantity measuring method, device, apparatus, storage medium, and program product Technical Field The present application relates to the field of physical measurement technologies, and in particular, to a physical quantity measurement method, device, apparatus, storage medium, and program product. Background With the deep penetration of the Internet of things technology in key fields such as industrial monitoring, biomedical and intelligent transportation, higher requirements are provided for the accuracy, environmental adaptability and multifunctional integration of physical quantity sensing measurement. However, prior art sensing techniques, while addressing these complex demands, are still limited by their underlying physical mechanisms, with a systematic bottleneck in measuring performance. For example, in the aspect of wireless sensing, the traditional technology is limited by signal stability, high-precision capturing of submillimeter-level deformation or microvolts voltage fluctuation is difficult to achieve, in the field of voltage metering, a Josephson junction array serving as an accuracy standard rod is necessary to depend on an extremely low-temperature superconducting environment maintained by liquid helium, equipment is huge and operation and maintenance costs are high, popularization of the Josephson junction array in field calibration and distributed application is severely restricted, in a high-temperature monitoring scene, the problems of reading drift and the like of widely used thermocouples are easy to occur due to instability of materials at high temperature, space resolution is insufficient, fine imaging of a temperature field cannot be achieved, and in the aspect of light intensity detection, devices such as a photoelectric tube have inherent saturation effect, dynamic range is narrow, and wide-range measurement from single photon counting to strong laser power cannot be compatible at the same time. The root causes of the limitations are that the traditional technology path is difficult to break through the principle constraints of contact measurement, extreme environment dependence, single parameter detection, narrow dynamic range and the like, so that the existing measurement scheme for the physical quantity faces challenges in measurement precision, applicability and functionality, and the technical requirements of an intelligent system on multi-physical quantity, high robustness and full-temperature-domain work cannot be met. The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present application and is not intended to represent an admission that the foregoing is prior art. Disclosure of Invention The application mainly aims to provide a physical quantity measuring method, a device, equipment, a storage medium and a program product, and aims to solve the technical problem that the existing physical quantity measuring scheme is limited by a bottom physical mechanism and has systematic bottleneck in measuring performance. In order to achieve the above object, the present application provides a physical quantity measuring method including: generating a first terahertz frequency comb and a second terahertz frequency comb, wherein the second tooth spacing of the frequency teeth of the second terahertz frequency comb is a fixed value; Modulating the first tooth space of the frequency teeth of the first terahertz frequency comb by using a physical quantity to be detected; carrying out beam combining interference on the modulated first terahertz frequency comb and the modulated second terahertz frequency comb, and detecting an alignment signal in a beam combining interference signal, wherein the alignment signal is generated by the difference between the first tooth spacing and the second tooth spacing; And calculating the measured value of the physical quantity to be measured according to the periodic variation of the alignment signal. In one embodiment, the step of calculating the measured value of the physical quantity to be measured according to the periodic variation of the alignment signal includes: counting the occurrence times of the alignment signal in the beam combining interference signal in a preset frequency range according to the periodical change of the alignment signal; and carrying out physical quantity inversion processing based on the occurrence times to obtain the measured value of the physical quantity to be measured. In an embodiment, the step of performing inversion processing on the physical quantity based on the occurrence number to obtain a measured value of the physical quantity to be measured includes: Calculating a pitch difference between the modulated first tooth pitch and the second tooth pitch based on the occurrence number and the second tooth pitch; and mapping the interval difference according to the corresponding relation between the interval difference and the physical quantity to