Method and device for calculating gravitational potential difference based on bidirectional cable time-frequency signal comparison

Abstract

The invention relates to the technical field of earth science, in particular to a method and device for calculating gravitational potential difference based on bidirectional cable time-frequency signal comparison, and the method comprises the steps: obtaining time-frequency signals through clocks which are respectively arranged at a first target position and a second target position and meet a preset precision condition; respectively transmitting the time-frequency signal of the first target position and the time-frequency signal of the second target position to the second target position and a target comparator of the first target position by using at least two same bidirectional time-frequency signal transmission cables so as to obtain first comparison data and second comparison data, and calculating a time operation rate difference between the first target position and the second target position, and calculating a gravitational potential difference between the first target position and the second target position. According to the method, the measurement cost can be reduced, meanwhile, the stability of data is improved through the bidirectional cable method, then the accuracy of a final gravitational potential difference calculation result is effectively improved, and generalization and practical application capacity are greatly improved.

Description

Technical Field

[0001] The present application relates to the field of earth science technology, and in particular to a method and device for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison. Background Art

[0002] In the related technology, the traditional method of measuring the earth's gravity usually involves placing a gravity instrument on the ground and manually moving the instrument to different measurement points. With the rapid development of clock technology, optical atomic clocks with an accuracy of 10-19 have been successfully manufactured internationally (Oelker et al, 2019). According to Einstein's general relativity principle, time-frequency signals can be used to measure gravity potential. The accuracy of atomic clocks can also reach the order of 10-18, which is equivalent to an accuracy of 0.1m2 / s2 in measuring gravity potential, which is equivalent to an altitude measurement accuracy of 0.01m, which provides the implementation conditions and basis for measuring gravity potential using time-frequency signals.

[0003] However, the traditional earth gravity measurement method in the related technology requires manual measurement, which requires a lot of time and human resources. Especially in large-scale measurement tasks, the time cost and labor cost are extremely high, and manual operation is prone to introduce errors, which limits the accuracy of the measurement data. In addition, manually moving the gravity potential measurement device can easily lead to a small amount of gravity potential measurement data, which cannot cover large areas, and has low generalization and practical application capabilities, which need to be solved urgently. Summary of the invention

[0004] The present application provides a method and device for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison, so as to solve the problem that the traditional earth gravity measurement method in the related art requires manual measurement, that is, it requires a lot of time and human resources, especially in large-scale measurement tasks, the time cost and human cost are extremely high, and manual operation is prone to introduce errors, which limits the accuracy of the measurement data. In addition, manually moving the gravity potential measurement device easily leads to a small amount of gravity potential measurement data, which cannot cover a large area, and has low generalization and practical application capabilities.

[0005] A first aspect of the present application provides a method for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison, comprising the following steps: using clocks that meet preset accuracy conditions and preset time conditions and are respectively set at a first target position and a second target position to obtain a time-frequency signal of the first target position and a time-frequency signal of the second target position; using at least two identical bidirectional time-frequency signal transmission cables to transmit the time-frequency signal of the first target position to a target comparator at the second target position and to transmit the time-frequency signal of the second target position to the target comparator at the first target position, so as to obtain first comparison data and second comparison data; based on the first comparison data and the second comparison data, calculating the time running rate difference between the first target position and the second target position, so as to calculate the gravity potential difference between the first target position and the second target position according to the time running rate difference.

[0006] Optionally, in one embodiment of the present application, the method of transmitting the time-frequency signal of the first target position to the target comparator of the second target position and transmitting the time-frequency signal of the second target position to the target comparator of the first target position by using at least two identical bidirectional time-frequency signal transmission cables includes: determining a power divider and a power amplifier that meet preset transmission conditions based on the clock; based on the bidirectional time-frequency signal transmission cable, transmitting the time-frequency signal of the first target position to the target comparator of the second target position and transmitting the time-frequency signal of the second target position to the target comparator of the first target position in combination with the power divider and the power amplifier.

[0007] Optionally, in one embodiment of the present application, the method of transmitting the time-frequency signal of the first target position to the target comparator of the second target position and transmitting the time-frequency signal of the second target position to the target comparator of the first target position using at least two identical bidirectional time-frequency signal transmission cables to obtain first comparison data and second comparison data includes: determining the second receiving frequency according to the target comparator of the second target position, and determining the first receiving frequency according to the target comparator of the first target position; receiving the time-frequency signal of the first target position according to the second receiving frequency using the target comparator of the second target position, and receiving the time-frequency signal of the second target position according to the first receiving frequency using the target comparator of the first target position to obtain the first comparison data and the second comparison data.

[0008] Optionally, in one embodiment of the present application, the calculation formula of the gravity potential difference is:

[0009]

[0010] Where, ΔW BA represents the gravitational potential difference between points AB, WB and W A They refer to the gravitational potential of points B and A respectively, c is the speed of light, generally 3×108m / s, Δf refers to the frequency change of the electromagnetic wave signal due to propagation, and f refers to the original frequency of the electromagnetic wave (i.e. when it was emitted).

[0011] The second aspect of the present application provides a device for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison, including: an acquisition module, used to use clocks that meet preset accuracy conditions and preset time conditions respectively set at the first target position and the second target position to obtain the time-frequency signal of the first target position and the time-frequency signal of the second target position; a transmission module, used to use at least two identical bidirectional time-frequency signal transmission cables to transmit the time-frequency signal of the first target position to the target comparator of the second target position and to transmit the time-frequency signal of the second target position to the target comparator of the first target position, so as to obtain first comparison data and second comparison data; a calculation module, used to calculate the time running rate difference between the first target position and the second target position based on the first comparison data and the second comparison data, so as to calculate the gravity potential difference between the first target position and the second target position according to the time running rate difference.

[0012] Optionally, in one embodiment of the present application, the transmission module includes: a first determination unit, used to determine a power divider and a power amplifier that meet preset transmission conditions based on the clock; a transmission unit, used to transmit the time-frequency signal of the first target position to the target comparator of the second target position and transmit the time-frequency signal of the second target position to the target comparator of the first target position based on the bidirectional time-frequency signal transmission cable, in combination with the power divider and the power amplifier.

[0013] Optionally, in one embodiment of the present application, the transmission module includes: a second determination unit, used to determine a second receiving frequency according to the target comparator of the second target position, and to determine a first receiving frequency according to the target comparator of the first target position; a receiving unit, used to receive the time-frequency signal of the first target position according to the second receiving frequency using the target comparator of the second target position, and to receive the time-frequency signal of the second target position according to the first receiving frequency using the target comparator of the first target position, so as to obtain the first comparison data and the second comparison data.

[0014] Optionally, in one embodiment of the present application, the calculation formula of the gravity potential difference is:

[0015]

[0016] Where, ΔW BArepresents the gravitational potential difference between points AB, W B and W A They refer to the gravitational potential of points B and A respectively, c is the speed of light, generally 3×108m / s, Δf refers to the frequency change of the electromagnetic wave signal due to propagation, and f refers to the original frequency of the electromagnetic wave (i.e. when it was emitted).

[0017] The third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison as described in the above embodiment.

[0018] The fourth aspect of the present application provides a computer-readable storage medium, which stores a computer program. When the program is executed by a processor, it implements the above method for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison.

[0019] The fifth aspect of the present application provides a computer program product, including a computer program, which, when executed, is used to implement the above method for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison.

[0020] The embodiment of the present application can transmit the time-frequency signals of two target positions through two identical bidirectional coaxial cables, so as to obtain the time running rate difference between the two target positions through the time-frequency signals of the two target positions, and then calculate the gravity potential difference between the two target positions. Thus, it is achieved that the gravity potential is measured with higher accuracy by using a high-precision clock, and the measurement cost is reduced while overcoming the defect that the error of traditional leveling measurement accumulates and increases with the increase of distance. The bidirectional cable method used can eliminate the influence of the cable on the data caused by environmental interference during calculation, thereby obtaining a more stable data result, and then effectively improving the accuracy of the final gravity potential difference calculation result, and the generalization and practical application ability are also greatly improved. Thus, it solves the problem that the traditional earth gravity measurement method in the related art needs manual measurement, that is, it requires a lot of time and human resources, especially in a large-scale measurement task, the time cost and human cost are extremely high, and manual operation is easy to introduce errors, which limits the accuracy of the measurement data, and the manual movement of the gravity potential measurement device is easy to lead to a small amount of gravity potential measurement data, unable to cover a large area, and low generalization and practical application ability.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0023] Figure 1 A flowchart of a method for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison according to an embodiment of the present application;

[0024] Figure 2 A schematic diagram of a bidirectional cable gravity position measurement system according to an embodiment of the present application;

[0025] Figure 3 A schematic diagram of measuring floor height using a bidirectional cable method according to an embodiment of the present application;

[0026] Figure 4 It is a schematic diagram of the structure of a device for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison according to an embodiment of the present application;

[0027] Figure 5 It is a schematic diagram of the structure of an electronic device provided according to an embodiment of the present application.

[0028] Reference numerals:

[0029] 10-Device for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison: 100-acquisition module, 200-transmission module and 300-calculation module; 501-memory, 502-processor and 503-communication interface. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0031] The following describes the method and device for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison of the embodiment of the present application with reference to the accompanying drawings. In view of the fact that the traditional earth gravity measurement method in the related art mentioned in the above background technology requires manual measurement, that is, it requires a lot of time and human resources, especially in large-scale measurement tasks, the time cost and human cost are extremely high, and manual operation is prone to introduce errors, which limits the accuracy of the measurement data, and the manual movement of the gravity potential measurement device is prone to lead to a small amount of gravity potential measurement data, unable to cover a large area, and low generalization and practical application capabilities. The present application provides a method for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison. In this method, the time-frequency signals of two target positions can be transmitted through two identical bidirectional coaxial cables, so as to obtain the time running rate difference between the two target positions through the time-frequency signals of the two target positions, and then calculate the gravity potential difference between the two target positions. Thus, it is achieved that the gravity potential can be measured with higher accuracy by using a high-precision clock, reducing the measurement cost while overcoming the defect of the traditional leveling measurement that the error accumulates and increases with the distance. The bidirectional cable method used can eliminate the influence of the cable on the data caused by environmental interference during calculation, thereby obtaining more stable data results, thereby effectively improving the accuracy of the final gravity potential difference calculation results, and the generalization and practical application capabilities are also greatly improved. Thus, it solves the problem that the traditional earth gravity measurement method in the related technology requires manual measurement, that is, it requires a lot of time and human resources, especially in large-scale measurement tasks, the time cost and human cost are extremely high, and manual operation is easy to introduce errors, limiting the accuracy of the measurement data, and manually moving the gravity potential measurement device, which is easy to lead to a small amount of gravity potential measurement data, unable to cover a large area, and low generalization and practical application capabilities.

[0032] Before explaining the method for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison in the embodiment of the present application, the basic principles involved in the embodiment of the present application and the gravity potential measurement system using the bidirectional cable method are explained.

[0033] According to Einstein's general theory of relativity, the running speed of clocks and the frequency of electromagnetic wave signals will change with the change of gravitational potential. In other words, the running speed of clocks at two points in different gravitational potentials is different. If a frequency signal is transmitted between two points, the frequency when the signal is sent is different from the frequency when the signal is received, that is, the frequency shift of the signal is closely related to the gravitational potential. Based on this, geodesists proposed a relativistic method for measuring gravitational potential difference, that is, by measuring the difference in the running speed or output frequency of the clocks between the two places, the gravitational potential difference between the two places can be calculated.

[0034] The gravity potential measurement system using the bidirectional cable method in the embodiment of the present application includes but is not limited to: a high-precision atomic clock and a supporting operating environment, including but not limited to an uninterruptible power supply, a constant temperature and humidity device, a magnetic shielding device, etc.; a set of time and frequency comparison devices, such as a time comparator (pulse comparator), a frequency comparator, etc.; two coaxial cables; a computer equipped with data processing software.

[0035] Specifically, Figure 1 A flowchart of a method for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison provided in an embodiment of the present application.

[0036] like Figure 1 As shown, the method for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison includes the following steps:

[0037] In step S101, a time-frequency signal of the first target position and a time-frequency signal of the second target position are obtained by using clocks that meet preset accuracy conditions and preset time conditions and are respectively set at the first target position and the second target position.

[0038] It is understood that the first target position and the second target position here refer to two positions where the gravity potential and the gravity potential difference between the positions need to be or can be calculated. The preset accuracy condition and the preset time condition here can be understood as certain accuracy conditions such as operating frequency and operating time conditions that the clock set at each position needs to meet.

[0039] According to the general theory of relativity, the stability of atomic clocks reaches 1×10-16 / day, and the corresponding positive high accuracy of measurements is at the meter level; the stability of atomic clocks reaches 1×10-17 / day, and the corresponding positive high accuracy of measurements is at the millimeter level.

[0040] Based on this, in some embodiments, the present application can respectively set clocks that meet certain accuracy conditions and certain time conditions at the first target position and the second target position, for example, various atomic clocks, etc. Among them, if a hydrogen atomic clock is used, the certain accuracy conditions and certain time conditions that the clock needs to meet are: the frequency stability must reach more than 1×10-16 / day, and the continuous operation time can reach more than 7 days; if an optical clock is used, the frequency stability of the clock must reach more than 1×10-17 / day, and the continuous operation time can reach more than 1 day.

[0041] It should be noted that in order to ensure the accuracy of the calculation results, the atomic clock must be calibrated before practical application. In addition, the atomic clock requires an environmental operating system with functions such as constant temperature, constant humidity, and radiation shielding to maintain its operating stability.

[0042] Then, the embodiment of the present application can respectively use the clocks at the first target position and the second target position to obtain the time-frequency signal of the first target position and the time-frequency signal of the second target position. By using a high-precision clock, the gravity position can be measured with higher precision, thereby overcoming the defect of traditional leveling measurement that the error accumulates and increases with the increase of distance, and it is convenient to use the high-precision time-frequency signals of the two target positions for calculations in subsequent processes.

[0043] It should be noted that the time-frequency signal in the embodiment of the present application includes time information and frequency information.

[0044] Step S102, using at least two identical bidirectional time-frequency signal transmission cables to transmit the time-frequency signal of the first target position to the target comparator of the second target position and to transmit the time-frequency signal of the second target position to the target comparator of the first target position, so as to obtain first comparison data and second comparison data.

[0045] During the actual implementation process, in order to obtain the difference in clock running rate or output frequency between the first target position and the second target position, the present application can transmit the time and frequency signal of the first target position to the target comparator of the second target position through at least two identical bidirectional time and frequency signal transmission cables that are matched with a clock such as an atomic clock, and transmit the time and frequency signal of the second target position to the target comparator of the first target position, thereby obtaining first comparison data and second comparison data, so as to calculate the difference in clock running rate or output frequency between the first target position and the second target position based on the first comparison data and the second comparison data.

[0046] In the embodiment of the present application, the target comparator here can be understood as a comparator that can receive the time-frequency signal output by the clock and has a certain signal comparison function and data storage and forwarding functions, so as to realize time-frequency comparison. For example, a pulse comparator and a frequency comparator, etc. In the specific implementation process, the target comparison can be selected or adjusted by professional and technical personnel in this field according to the actual situation. The embodiment of the present application is only for illustrative purposes and is not specifically limited.

[0047] Due to the influence of the environment on the cable, some fluctuations may occur in the data, and these fluctuations cannot be eliminated by general signal processing methods. Therefore, the embodiment of the present application can use two cables of the same model and fix them in the same position for transmission. During specific transmission, the first target position and the second target position transmit the time-frequency signal to each other through a coaxial cable respectively, that is, the first target position is transmitted to the second target position through a coaxial cable, and the second target position is transmitted to the first target position through another coaxial cable, then the signals received by both sides will be affected by the same environment.

[0048] Therefore, after obtaining the first comparison data and the second comparison data, certain elimination processing can be performed to eliminate the influence of these environments and obtain data with better quality. In addition, the cable itself also has a time delay effect on the signal. The embodiment of the present application can, but is not limited to, first measure it through a time comparator and an atomic clock, record it as a system parameter of the cable, and subtract the value from the final data result to eliminate the influence of the cable itself on the data.

[0049] Specifically, two cables of the same model should be of the same type and fixed together, and should have a certain transmission capacity, such as LMR200 or above. The time delay of the cable needs to be measured and recorded before application, and the cable should be buried or fixed on the surface to ensure stable measurement conditions.

[0050] Optionally, in one embodiment of the present application, at least two identical bidirectional time-frequency signal transmission cables are used to transmit the time-frequency signal of the first target position to the target comparator of the second target position and to transmit the time-frequency signal of the second target position to the target comparator of the first target position, including: determining a power divider and a power amplifier that meet preset transmission conditions based on a clock; based on the bidirectional time-frequency signal transmission cable, in combination with the power divider and the power amplifier, transmitting the time-frequency signal of the first target position to the target comparator of the second target position and to the target comparator of the second target position.

[0051] It can be understood that the preset transmission condition here refers to the condition that can be met to transmit the time-frequency signal of the first target position and the time-frequency signal of the second target position.

[0052] In the actual implementation process, in the process of using at least two identical bidirectional time-frequency signal transmission cables to transmit the time-frequency signal of the first target position and the time-frequency signal of the second target position to the target comparator of the second target position and the first target position, in addition to the time-frequency signal transmission cable that is mainly used in conjunction with the atomic clock, in order to make the target comparator obtain a clearer and more stable time-frequency signal, the present application can also be combined with a certain power divider and power amplifier to transmit the time-frequency signal of the first target position to the target comparator of the second target position and the time-frequency signal of the second target position to the target comparator of the first target position. Among them, the power divider and the power amplifier should also match the clock.

[0053] For example, the embodiment of the present application can select a corresponding target comparator such as a time comparator (pulse comparator) or a frequency comparator to compare the time-frequency signals according to the signal type output by the atomic clock. The atomic clock outputs the time-frequency signal to the signal distributor, and the signal distributor transmits the time signal or frequency signal to the other station via a coaxial cable. The comparator receives the signal and amplifies the time-frequency signal using a power amplifier during transmission, so that the time-frequency signal received by the comparator is clearer and more accurate.

[0054] Optionally, in one embodiment of the present application, at least two identical bidirectional time-frequency signal transmission cables are used to transmit the time-frequency signal of the first target position to the target comparator of the second target position and to transmit the time-frequency signal of the second target position to the target comparator of the first target position to obtain first comparison data and second comparison data, including: determining the second receiving frequency according to the target comparator of the second target position, and determining the first receiving frequency according to the target comparator of the first target position; receiving the time-frequency signal of the first target position according to the second receiving frequency using the target comparator of the second target position, and receiving the time-frequency signal of the second target position according to the first receiving frequency using the target comparator of the first target position to obtain first comparison data and second comparison data.

[0055] In other embodiments, when the target comparator at the first target position and the target comparator at the second position are used to receive the time-frequency signal, the present application may also first determine the optimal receiving frequency of each target comparator so as to use each target comparator to receive the time-frequency signal according to the optimal receiving frequency.

[0056] That is, the embodiment of the present application can determine the first receiving frequency according to the target comparator of the first target position, and determine the second receiving frequency according to the target comparator of the second target position; then use the target comparator of the second target position to receive the time-frequency signal of the first target position according to the second receiving frequency, and use the target comparator of the first target position to receive the time-frequency signal of the second target position according to the first receiving frequency, so as to obtain first comparison data and second comparison data.

[0057] For example, the pulse comparator can use the 10MHz signal output by the atomic clock as the frequency source, thereby comparing the second pulse signal output by the atomic clock; the frequency comparator can connect to the 10MHz signal output by the atomic clock as the frequency source, thereby comparing the 10MHZ frequency signal output by the atomic clock.

[0058] Step S103, based on the first comparison data and the second comparison data, calculate the time running speed difference between the first target position and the second target position, so as to calculate the gravity potential difference between the first target position and the second target position according to the time running speed difference. The calculation formula of the gravity potential difference can be, but is not limited to, expressed as:

[0059]

[0060] Where, ΔW BA represents the gravitational potential difference between points AB, W B and W A They refer to the gravitational potential of points B and A respectively, c is the speed of light, generally 3×108m / s, Δf refers to the frequency change of the electromagnetic wave signal due to propagation, and f refers to the original frequency of the electromagnetic wave (i.e. when it was emitted).

[0061] As a possible implementation method, after receiving the signal using the target comparator, the present application can compare the received time-frequency signal of the other party's position with the time-frequency signal of its own position, and transmit the data to the computer for calculation, and obtain the time running rate difference between the two positions. This difference can be used to calculate the gravity potential of the two positions, and then use the gravity potential of the two positions to calculate the gravity potential difference between the two positions. The formula can be, but is not limited to, expressed as:

[0062]

[0063] Where, ΔW BA represents the gravitational potential difference between points AB, W B and W A They refer to the gravitational potential of points B and A respectively, c is the speed of light, generally 3×108m / s, Δf refers to the frequency change of the electromagnetic wave signal due to propagation, and f refers to the original frequency of the electromagnetic wave (i.e. when it was emitted).

[0064] Furthermore, in the embodiment of the present application, the difference in the orthometric height between two target positions can also be calculated by the gravity potential difference.

[0065] When calculating the gravity potential difference and the difference in orthometric height between two positions, the embodiment of the present application may, but is not limited to, use a computer for data processing. The computer should be able to receive and store data transmitted by an atomic clock, a time frequency comparison device, and a coaxial cable, and have certain data correction and verification functions to ensure the accuracy of the measured data; and have certain real-time data processing capabilities, and be able to instantly calculate and output the gravity potential of the target point, to ensure the real-time and accuracy of the gravity potential difference calculation results.

[0066] The embodiments of the present application are described in detail below with four specific embodiments.

[0067] Figure 2 FIG. 1 is a schematic diagram of a bidirectional cable gravity position measurement system according to an embodiment of the present application. Figure 2As shown, first, the implementation of the present application can configure atomic clocks, time-frequency signal distributors, time-frequency signal amplifiers and time-frequency signal comparators at two target locations where the gravity potential difference needs to be measured, and use an uninterruptible power supply to power the atomic clocks. The atomic clock transmits the time-frequency signal to the time-frequency signal comparator through the time-frequency signal distributor and the time-frequency signal amplifier to provide a frequency standard. After that, the two different target locations transmit the time-frequency signal to each other through different coaxial cables. After that, the gravity potential difference between the two stations can be determined by data calculation.

[0068] For the convenience of practical application, the embodiment of the present application can utilize a method for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison to form a gravity potential measurement system using a bidirectional cable method, including: a high-precision atomic clock, and a supporting operating environment, including an uninterruptible power supply, a constant temperature and humidity device, a magnetic shielding device, etc. A set of time and frequency comparison devices, such as a time comparator (pulse comparator), a frequency comparator, etc. Two coaxial cables. A computer, which needs to be equipped with data processing software, etc. Among them, all devices must meet the conditions described in other embodiments.

[0069] Embodiment 1:

[0070] Constructing a high-rise building floor height monitoring system: Using the method of calculating gravity potential difference based on bidirectional cable time-frequency signal comparison in the embodiment of the present application can be used, but is not limited to, for real-time monitoring of vertical height changes of high-rise building floors to support structural health monitoring and deformation analysis.

[0071] Figure 3 This is a schematic diagram of measuring floor height using a bidirectional cable method according to an embodiment of the present application. Figure 3 As shown in the figure, a gravity potential measurement system is installed on a high floor and a low floor of the same high-rise building, and a bidirectional cable is used to connect them. If the clock parameters are not adjusted before the experiment, two parts of the experiment are required. That is, it is necessary to first determine the system error between the two atomic clocks through a zero baseline experiment, and then place the two clocks in two locations for experiments. The gravity potential between the two floors can be determined through two experiments. The specific process can be expressed as follows:

[0072] System Configuration:

[0073] (1) Floor monitoring station: A floor monitoring station is set up on each floor, equipped with a gravity position measurement system connected by coaxial cables. Each station contains key components such as high-precision atomic clocks, time and frequency comparison devices, and coaxial cables.

[0074] (2) Coaxial cable network: Use coaxial cables to connect the measurement systems of monitoring stations on each floor into a coaxial cable network. Select a coaxial cable model suitable for the building environment to ensure stable signal transmission.

[0075] (3) Data acquisition and processing system: A data acquisition system is set up at each site to receive, store and process measurement data. It is equipped with a computer and data processing software to calculate and output the gravity position data of the floor height in real time.

[0076] Implementation steps:

[0077] (1) System installation and initialization: Install the gravity position measurement system on each floor of the building and ensure the stability of the coaxial cable connection. Start the high-precision atomic clocks at each site and calibrate them to ensure frequency stability.

[0078] (2) Coaxial cable transmission: Time frequency signals and measurement data are transmitted through the coaxial cable network to achieve real-time data transmission between floors.

[0079] (3) Floor height monitoring: By measuring the changes in gravity caused by the floor, the vertical height changes of each floor are monitored in real time. The data acquisition system records and stores the monitoring data.

[0080] (4) Data analysis and result output: Use data processing software to analyze monitoring data and calculate the vertical height change of each floor. Output floor height data in real time and visualize the vertical deformation of the building structure.

[0081] The floor height monitoring system can monitor the vertical deformation of high-rise building structures in real time, providing key data support for structural health monitoring. The high accuracy and real-time performance of the system make it widely used in construction project management, structural health assessment and safety monitoring.

[0082] Embodiment 2:

[0083] Constructing a high-precision groundwater level monitoring system: The method for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison in the embodiment of this application can be used, but not limited to, to monitor the changes in groundwater level in real time, providing important data support for groundwater resource management. The high precision and real-time performance of the system make it have broad application prospects in water resource protection, groundwater level regulation and environmental monitoring.

[0084] System Configuration:

[0085] (1) Measurement site: Multiple groundwater wells are set up, and each wellhead is equipped with a gravity potential measurement system connected by a coaxial cable. Each site is equipped with high-precision atomic clocks, time and frequency comparison devices, coaxial cables and other equipment.

[0086] (2) Coaxial cable network: Use coaxial cables to connect the measurement systems at each wellhead to form a coaxial cable network. Select coaxial cable models with high anti-interference performance to ensure the stability of signal transmission.

[0087] (3) Data acquisition and processing system: A data acquisition system is set up at each site to receive, store and process measurement data. It is equipped with a computer and installed with data processing software to calculate and output the gravity data of the groundwater level in real time.

[0088] Implementation steps:

[0089] (1) System deployment and calibration: Install the gravity level measurement system at the groundwater wellhead and ensure that the coaxial cable is well connected. Start the high-precision atomic clock at each site and perform clock calibration to ensure frequency stability.

[0090] (2) Coaxial cable transmission: Time frequency signals and measurement data are transmitted through the coaxial cable network to achieve real-time data exchange between various sites.

[0091] (3) Groundwater level monitoring: By measuring the changes in gravity caused by the groundwater level, the changes in the groundwater level are monitored in real time. The data acquisition system regularly records and stores the measurement data.

[0092] (4) Data analysis and result output: Use data processing software to analyze the measured data and calculate the gravity potential change of the groundwater level. Output the groundwater level data in real time and visualize the temporal and spatial change trend of the groundwater level.

[0093] Through this high-precision groundwater level monitoring system, the changes in groundwater levels can be monitored in real time, providing important data support for groundwater resource management. The high precision and real-time performance of the system make it have broad application prospects in water resource protection, groundwater level regulation and environmental monitoring.

[0094] Embodiment three:

[0095] Constructing a geological structure deformation monitoring system: Using the method of calculating gravity potential difference based on bidirectional cable time-frequency signal comparison in the embodiment of the present application can be used, but is not limited to, for real-time monitoring of the vertical deformation of geological structures to support geological disaster warning and geological structure research.

[0096] System Configuration:

[0097] (1) Monitoring station setting: Multiple monitoring stations are set up at key points of geological structures, and each station is equipped with a gravity potential measurement system connected by coaxial cables. Each station includes core components such as high-precision atomic clocks, time and frequency comparison devices, and coaxial cables.

[0098] (2) Coaxial cable network: Use coaxial cables to connect the measurement systems of each monitoring site into a coaxial cable network. Select a coaxial cable model suitable for the geological environment to ensure stable signal transmission.

[0099] (3) Data acquisition and processing system: A data acquisition system is set up at each site to receive, store and process measurement data. It is equipped with a computer and data processing software to calculate and output the vertical deformation data of the geological structure in real time.

[0100] Implementation steps:

[0101] (1) System installation and commissioning: Install the gravity potential measurement system at key points of the geological structure and ensure that the coaxial cable is firmly connected. Start the high-precision atomic clocks at each site and calibrate them to ensure frequency stability.

[0102] (2) Coaxial cable transmission: Time frequency signals and measurement data are transmitted through a coaxial cable network to achieve real-time data transmission between monitoring sites.

[0103] (3) Geological structure deformation monitoring: By measuring the gravity potential changes caused by the geological structure, the vertical deformation of the geological structure is monitored in real time. The data acquisition system records and stores the monitoring data.

[0104] (4) Data analysis and result output: Use data processing software to analyze monitoring data and calculate the vertical deformation of geological structures. Output geological structure deformation data in real time and provide intuitive deformation trend graphs and reports.

[0105] The geological structure deformation monitoring system can monitor the vertical deformation of geological structures in real time, providing important data support for the prediction of geological disasters and geological structure research. The high precision and real-time performance of the system make it have broad application prospects in the fields of geological disaster monitoring, geological exploration and geological research.

[0106] Embodiment 4:

[0107] Constructing a high-precision geodetic research system: The method of calculating gravity potential difference based on bidirectional cable time-frequency signal comparison in the embodiment of the present application can be used for, but is not limited to, high-precision geodetic research to support accurate measurement of the earth's shape and gravitational field.

[0108] System Configuration:

[0109] (1) Geodetic stations: Multiple geodetic stations are set up at different geographical locations, and each station is equipped with a gravity potential measurement system connected by coaxial cables.

[0110] Each site includes core components such as high-precision atomic clocks, time and frequency comparison devices, and coaxial cables.

[0111] (2) Coaxial cable network: Use coaxial cables to connect the measurement systems of various geodetic measurement sites into a coaxial cable network. Select a coaxial cable model suitable for the geodetic measurement environment to ensure stable signal transmission.

[0112] (3) Data acquisition and processing system: A data acquisition system is set up at each site to receive, store and process measurement data. It is equipped with a computer and installed with data processing software to calculate and output geodetic parameters in real time.

[0113] Implementation steps:

[0114] (1) System deployment and clock calibration: Deploy the gravity potential measurement system at each geodetic site and ensure that the coaxial cable is well connected. Start the high-precision atomic clock at each site and perform clock calibration to ensure frequency stability.

[0115] (2) Coaxial cable transmission: Time frequency signals and measurement data are transmitted through the coaxial cable network to achieve real-time data transmission between stations.

[0116] (3) Geodetic research: By measuring the changes in the gravitational potential caused by the earth, the small changes in the shape and gravitational field of the earth are monitored in real time. The data acquisition system records and stores geodetic data.

[0117] (4) Data analysis and result output: Use data processing software to analyze the measurement data and calculate the parameters of the earth's shape and gravitational field. Output the geodetic parameters in real time and provide a high-precision earth shape and gravitational field model.

[0118] This high-precision geodetic system can monitor the tiny changes in the shape of the earth and the gravitational field in real time, providing key data support for geodetic research. The high precision and real-time performance of the system make it widely used in geodesy, satellite navigation calibration, geophysical research and other fields.

[0119] According to the method for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison proposed in the embodiment of the present application, the time-frequency signals of the two target positions can be transmitted through two identical bidirectional coaxial cables, so as to obtain the time running rate difference between the two target positions through the time-frequency signals of the two target positions, and then calculate the gravity potential difference between the two target positions. Thus, it is achieved that the gravity potential is measured with higher accuracy by using a high-precision clock, reducing the measurement cost while overcoming the defect that the error of traditional leveling measurement accumulates and increases with the increase of distance. The bidirectional cable method used can eliminate the influence of the cable on the data caused by environmental interference during calculation, thereby obtaining more stable data results, thereby effectively improving the accuracy of the final gravity potential difference calculation result, and the generalization and practical application ability are also greatly improved. This solves the problem that the traditional earth gravity measurement method in the related technology requires manual measurement, which requires a lot of time and human resources. Especially in large-scale measurement tasks, the time cost and labor cost are extremely high, and manual operation is prone to introduce errors, limiting the accuracy of the measurement data. In addition, manually moving the gravity potential measurement device can easily lead to a small amount of gravity potential measurement data, which cannot cover large areas, and has low generalization and practical applicability.

[0120] Next, a device for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison according to an embodiment of the present application is described with reference to the accompanying drawings.

[0121] Figure 4 It is a schematic diagram of the structure of a device for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison according to an embodiment of the present application.

[0122] like Figure 4 As shown, the device 10 for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison includes: an acquisition module 100, a transmission module 200 and a calculation module 300.

[0123] The acquisition module 100 is used to obtain the time-frequency signal of the first target position and the time-frequency signal of the second target position by using clocks respectively set at the first target position and the second target position and satisfying preset accuracy conditions and preset time conditions.

[0124] The transmission module 200 is used to transmit the time-frequency signal of the first target position to the target comparator of the second target position and to transmit the time-frequency signal of the second target position to the target comparator of the first target position using at least two identical bidirectional time-frequency signal transmission cables to obtain first comparison data and second comparison data.

[0125] The calculation module 300 is used to calculate the time running rate difference between the first target position and the second target position based on the first comparison data and the second comparison data, so as to calculate the gravity potential difference between the first target position and the second target position according to the time running rate difference.

[0126] Optionally, in one embodiment of the present application, the transmission module 200 includes: a first determination unit and a transmission unit.

[0127] Wherein, the first determination unit is used to determine the power divider and the power amplifier that meet the preset transmission conditions according to the clock.

[0128] A transmission unit is used to transmit the time-frequency signal of the first target position to the target comparator of the second target position and to transmit the time-frequency signal of the second target position to the target comparator of the first target position based on a bidirectional time-frequency signal transmission cable in combination with a power distributor and a power amplifier.

[0129] Optionally, in one embodiment of the present application, the transmission module 200 includes: a second determination unit and a receiving unit.

[0130] The second determining unit is used to determine the second receiving frequency according to the target comparator at the second target position, and to determine the first receiving frequency according to the target comparator at the first target position;

[0131] A receiving unit is used to use a target comparator at a second target position to receive a time-frequency signal at a first target position according to a second receiving frequency, and to use a target comparator at the first target position to receive a time-frequency signal at a second target position according to a first receiving frequency, so as to obtain first comparison data and second comparison data.

[0132] Optionally, in one embodiment of the present application, the calculation formula of the gravity potential difference can be, but is not limited to, expressed as:

[0133]

[0134] Where, ΔW BA represents the gravitational potential difference between points AB, W B and W A They refer to the gravitational potential of points B and A respectively, c is the speed of light, generally 3×108m / s, Δf refers to the frequency change of the electromagnetic wave signal due to propagation, and f refers to the original frequency of the electromagnetic wave (i.e. when it was emitted).

[0135] It should be noted that the aforementioned explanation of the method embodiment for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison is also applicable to the device for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison in this embodiment, and will not be repeated here.

[0136] According to the device for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison proposed in the embodiment of the present application, the time-frequency signals of two target positions can be transmitted through two identical bidirectional coaxial cables, so as to obtain the time running rate difference between the two target positions through the time-frequency signals of the two target positions, and then calculate the gravity potential difference between the two target positions. Thus, it is achieved that the gravity potential is measured with higher accuracy by using a high-precision clock, reducing the measurement cost while overcoming the defect that the error of traditional leveling measurement accumulates and increases with the increase of distance. The bidirectional cable method used can eliminate the influence of the cable on the data caused by environmental interference during calculation, thereby obtaining more stable data results, thereby effectively improving the accuracy of the final gravity potential difference calculation result, and the generalization and practical application ability are also greatly improved. This solves the problem that the traditional earth gravity measurement method in the related technology requires manual measurement, which requires a lot of time and human resources. Especially in large-scale measurement tasks, the time cost and labor cost are extremely high, and manual operation is prone to introduce errors, limiting the accuracy of the measurement data. In addition, manually moving the gravity potential measurement device can easily lead to a small amount of gravity potential measurement data, which cannot cover large areas, and has low generalization and practical applicability.

[0137] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device may include:

[0138] A memory 501 , a processor 502 , and a computer program stored in the memory 501 and executable on the processor 502 .

[0139] When the processor 502 executes the program, the method for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison provided in the above embodiment is implemented.

[0140] Furthermore, the electronic device further comprises:

[0141] The communication interface 503 is used for communication between the memory 501 and the processor 502 .

[0142] The memory 501 is used to store computer programs that can be executed on the processor 502 .

[0143] The memory 501 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0144] If the memory 501, the processor 502 and the communication interface 503 are implemented independently, the communication interface 503, the memory 501 and the processor 502 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0145] Optionally, in a specific implementation, if the memory 501, the processor 502 and the communication interface 503 are integrated on a chip, the memory 501, the processor 502 and the communication interface 503 can communicate with each other through an internal interface.

[0146] The processor 502 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0147] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above method for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison.

[0148] The embodiment of the present application also provides a computer program product, including a computer program, which can run computer instructions. When the computer instructions are executed by a processor, the method for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison provided in the embodiment of the present application is implemented.

[0149] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0150] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0151] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0152] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or N wirings (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways as necessary and then storing it in a computer memory.

[0153] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented by hardware, as in another embodiment, it can be implemented by any one or a combination of multiple of the following technologies known in the art: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0154] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0155] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0156] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison, characterized in that: The following steps are involved: Using clocks that meet preset accuracy conditions and preset time conditions and are respectively set at the first target position and the second target position, a time-frequency signal of the first target position and a time-frequency signal of the second target position are obtained; Using at least two identical bidirectional time-frequency signal transmission cables, the time-frequency signal of the first target position is transmitted to the target comparator of the second target position, and the time-frequency signal of the second target position is transmitted to the target comparator of the first target position, so as to obtain first comparison data and second comparison data; A time running rate difference between the first target position and the second target position is calculated based on the first comparison data and the second comparison data, so as to calculate a gravity potential difference between the first target position and the second target position according to the time running rate difference.

2. The method according to claim 1, characterized in that: The method of using at least two identical bidirectional time-frequency signal transmission cables to transmit the time-frequency signal of the first target position to the target comparer of the second target position and to transmit the time-frequency signal of the second target position to the target comparer of the first target position comprises: Determine a power divider and a power amplifier that meet preset transmission conditions according to the clock; Based on the bidirectional time-frequency signal transmission cable, in combination with the power distributor and the power amplifier, the time-frequency signal of the first target position is transmitted to the target comparator of the second target position and the time-frequency signal of the second target position is transmitted to the target comparator of the first target position.

3. The method according to claim 1, characterized in that The method of using at least two identical bidirectional time-frequency signal transmission cables to transmit the time-frequency signal of the first target position to the target comparator of the second target position and to transmit the time-frequency signal of the second target position to the target comparator of the first target position to obtain first comparison data and second comparison data comprises: Determine a second receiving frequency according to the target comparator at the second target position, and determine a first receiving frequency according to the target comparator at the first target position; The target comparator of the second target position is used to receive the time-frequency signal of the first target position according to the second receiving frequency, and the target comparator of the first target position is used to receive the time-frequency signal of the second target position according to the first receiving frequency to obtain the first comparison data and the second comparison data.

4. The method according to claim 1, characterized in that: The calculation formula of the gravity potential difference is: Where, ΔW BA represents the gravitational potential difference between points AB, W B and W A They refer to the gravitational potential of points B and A respectively, c is the speed of light, Δf refers to the frequency change of the electromagnetic wave signal caused by propagation, and f refers to the original frequency of the electromagnetic wave (i.e. when it was emitted).

5. A device for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison, characterized in that: include: An acquisition module, used to obtain a time-frequency signal of the first target position and a time-frequency signal of the second target position by using clocks respectively set at the first target position and the second target position and satisfying a preset accuracy condition and a preset time condition; A transmission module, used to transmit the time-frequency signal of the first target position to the target comparator of the second target position and to transmit the time-frequency signal of the second target position to the target comparator of the first target position by using at least two identical bidirectional time-frequency signal transmission cables, so as to obtain first comparison data and second comparison data; A calculation module is used to calculate the time running rate difference between the first target position and the second target position based on the first comparison data and the second comparison data, so as to calculate the gravity potential difference between the first target position and the second target position according to the time running rate difference.

6. The device according to claim 5, characterized in that The transmission module comprises: A first determining unit, configured to determine a power divider and a power amplifier that meet a preset transmission condition according to the clock; A transmission unit is used to transmit the time-frequency signal of the first target position to the target comparator of the second target position and to transmit the time-frequency signal of the second target position to the target comparator of the first target position based on the bidirectional time-frequency signal transmission cable in combination with the power distributor and the power amplifier.

7. The device according to claim 5, characterized in that The transmission module comprises: A second determining unit, configured to determine a second receiving frequency according to the target comparator at the second target position, and to determine a first receiving frequency according to the target comparator at the first target position; A receiving unit is used to use the target comparator of the second target position to receive the time-frequency signal of the first target position according to the second receiving frequency, and to use the target comparator of the first target position to receive the time-frequency signal of the second target position according to the first receiving frequency, so as to obtain the first comparison data and the second comparison data.

8. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison as described in any one of claims 1 to 4.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the method for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison as described in any one of claims 1 to 4.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed, it is used to implement the method for calculating gravity potential difference based on bidirectional cable time-frequency signal comparison as described in any one of claims 1 to 4.

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