Leveling system and method

Abstract

The invention provides a leveling system and method. The leveling system comprises a level gauge, a front view ruler, a rear view ruler, two view ruler modules and a level gauge module, the hardware structures of the view ruler modules and the level gauge module are the same, the front view ruler and the rear view ruler are arranged on the two sides of the level gauge respectively, and the two view ruler modules are arranged on the front view ruler and the rear view ruler respectively; the level gauge module receives the distance information and the height information sent by the visual ruler module and determines the horizontal distance and the elevation difference among the level gauge, the front visual ruler and the rear visual ruler after calibration in combination with the distance information and the height information collected by the level gauge module; the horizontal distance and the elevation difference are sent to a visual ruler module; and if the horizontal distance and the elevation difference meet a preset alarm condition, giving an alarm. According to the method, the front and rear view rulers and the level gauge can be effectively arranged for a few times according to the alarm prompt, the operation efficiency is improved, and meanwhile, the situation that the calculated horizontal distance or height difference error becomes large due to long-time operation is avoided by calibrating data.

Description

Technical Field

[0001] This disclosure relates to the field of engineering surveying technology, and in particular to a leveling system and method. Background Technology

[0002] An electronic level is a commonly used field surveying and mapping device. A typical leveling system includes the level, a front (invar) rod, and a rear (invar) rod. During surveying and mapping, the positional relationship between the level and the front and rear rods is as follows: Figure 1 As shown, multi-point measurement and mapping are achieved by continuously moving the level, front ruler, and rear ruler by the operators.

[0003] To ensure measurement accuracy, it is generally required that the distance between the front rod and the level instrument, and the distance between the rear rod and the level instrument, should not exceed 50 meters, and the elevation difference should not exceed 1 meter during surveying and mapping. However, when workers move the level instrument, front rod, and rear rod during field operations, the lack of prompts during the movement often leads to excessive distance and elevation differences, requiring multiple moves of the level instrument, front rod, and rear rod to complete a single effective surveying and mapping operation. During prolonged operation, the varying temperatures of the internal barometer cause differences in its error characteristics, resulting in increasingly larger elevation difference measurement errors in the module components. This, in turn, affects the horizontal distance error, failing to meet the requirements for elevation difference and distance accuracy. Summary of the Invention

[0004] This disclosure provides a leveling system and method to avoid large errors in the calculation of horizontal distance or height difference caused by long-term operation.

[0005] In a first aspect, a leveling system is provided, comprising a level instrument, a foresight rod, a backsight rod, two rod modules, and a level instrument module. The rod modules and the level instrument module have the same hardware structure. The foresight rod and the backsight rod are respectively disposed on both sides of the level instrument. The two rod modules are respectively disposed on the foresight rod and the backsight rod. The level instrument module is disposed on the level instrument. The rod modules and the level instrument module are communicatively connected. The leveling instrument module receives distance and height information sent by the two sight rod modules, and combines it with its own collected distance and height information. After calibration, it determines the horizontal distance and elevation difference between the leveling instrument, the foresight rod, and the backsight rod. The leveling instrument module sends the horizontal distance and the elevation difference to the two sight rod modules; If the horizontal distance and / or the elevation difference meet the preset alarm conditions, the level module and / or the sight rod module will issue an alarm.

[0006] The above leveling system allows for the efficient deployment of foresight and leveling rods and instruments in a few or even single operations based on alarm prompts, significantly reducing the number of movements required and improving operational efficiency. Furthermore, calibration of distance and height information enhances the accuracy of determined horizontal distances and elevation differences.

[0007] Optionally, the sight ruler module and the level module include a distance measuring module, a height measuring module, a communication module, and a parameter calibration module; the distance measuring module is used to measure the distance data between itself and other targets, the height measuring module is used to measure the height data of its own location, the communication module is used to send the distance data and the height data to the communication target, and the parameter calibration module is used to calibrate the distance data and / or the height data.

[0008] Optionally, the ranging module includes a wireless two-way ranging module and a wireless two-way ranging antenna connected to the wireless two-way ranging module, the altitude measurement module is configured as a barometer and a thermometer, and the parameter calibration module includes a satellite positioning receiver and a satellite positioning antenna connected to the satellite positioning receiver.

[0009] Optionally, the leveling module receives distance and height information from the two sight rod modules, and, after calibration, determines the horizontal distance and elevation difference between the leveling instrument, the foresight rod, and the backsight rod, in conjunction with its own collected distance and height information, including: The leveling module receives air pressure and temperature information sent by the two sight rod modules, and determines the elevation difference between the leveling module and the sight rod module by combining its own collected air pressure and temperature information with preset barometer error parameters. The level module obtains distance information between itself and the stadia module through the wireless two-way ranging module; The leveling instrument module determines the horizontal distance between itself and the stadia module based on the elevation difference and the distance information.

[0010] Optionally, before the leveling instrument module receives the distance and height information sent by the two sight rod modules, combines it with its own collected distance and height information, and determines the horizontal distance and elevation difference between the leveling instrument, the foresight rod, and the backsight rod after calibration, it further includes: The leveling instrument module and the two sight rod modules are powered on, and the barometer is calibrated through the parameter calibration module.

[0011] Optionally, the barometer calibration includes: The leveling instrument module and the two sight rod modules detected that the satellite positioning receiver had entered the dynamic carrier phase differential positioning mode. The level module receives calibration air pressure information and calibration temperature information sent by the two sight scale modules; The leveling module obtains the three-dimensional relative coordinates of the two spectral scale modules with respect to the leveling module through the satellite positioning receiver; The leveling instrument module determines the barometer error parameters based on the calibration air pressure information, the calibration temperature information, and the three-dimensional relative coordinates, and sends the barometer error parameters to the two sight scale modules.

[0012] Optionally, the level module is configured as a base station for dynamic carrier phase differential positioning.

[0013] Optionally, the sight rod module and the level module further include a display screen for displaying the horizontal distance and / or the elevation difference.

[0014] Secondly, a leveling method is provided, applied to a leveling instrument module of the leveling system described in any of the above embodiments, the method comprising: The system receives distance and height information from the two sight rod modules, combines it with its own collected distance and height information, and determines the horizontal distance and elevation difference between the level, the foresight rod, and the backsight rod after calibration. The horizontal distance and the elevation difference are sent to the two sight scale modules; An alarm is triggered if the horizontal distance and / or the elevation difference meet the preset alarm conditions.

[0015] In some embodiments, receiving the distance and height information sent by the two sight rod modules, combining it with the distance and height information collected by the instrument itself, and determining the horizontal distance and elevation difference between the level, the foresight rod, and the backsight rod after calibration includes: The system receives air pressure and temperature information from the two sight rod modules, and determines the elevation difference between the level module and the sight rod module by combining the air pressure and temperature information it collects with preset barometer error parameters. The distance information between itself and the sight ruler module is obtained through a wireless two-way ranging module; The horizontal distance between the ruler module and the elevation difference is determined based on the elevation difference and the distance information. Attached Figure Description

[0016] The accompanying drawings used in the description of the embodiments of this disclosure are briefly introduced below: Figure 1 The diagram shows the positions of the level and front and rear rulers provided in some embodiments of this application; Figure 2The diagram shows a schematic representation of a leveling system provided in some embodiments of this application. Figure 3 A schematic diagram of another leveling module provided in some embodiments of this application is shown; Figure 4 A schematic flowchart of a leveling method provided in some embodiments of this application is shown; Figure 5 A schematic flowchart of a barometer calibration method for a leveling measurement method provided in some embodiments of this application is shown; Figure 6 A schematic diagram of the structure of a leveling module provided in some embodiments of this application is shown. Detailed Implementation

[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the specific implementation methods of this disclosure will be described below with reference to the accompanying drawings. The accompanying drawings described below are merely some embodiments of this disclosure. For those skilled in the art, other drawings or embodiments can be obtained based on these drawings or embodiments without creative effort. Adjustments and improvements made without departing from the concept of this disclosure are all within the protection scope of this disclosure.

[0018] To keep the drawings simple, each figure only schematically shows the parts relevant to the embodiment, and they do not represent the actual structure of the product. In addition, for the sake of simplicity and ease of understanding, only some structures or parts are schematically shown, and there may be more or fewer similar structures or parts in reality.

[0019] like Figure 2 As shown, the leveling system includes a level instrument, a foresight rod, a backsight rod, two stadia rod modules, and a level instrument module. The foresight rod and backsight rod are located on opposite sides of the level instrument, and the two stadia rod modules are mounted on the foresight rod and backsight rod, respectively. The level instrument module is mounted on the level instrument. The stadia rod modules and the level instrument module are communicatively connected. The two stadia rod modules and the level instrument module work together to determine the horizontal distance and elevation difference between the stadia rod modules and the foresight and backsight rods. The stadia rod modules are detachably connected to the foresight and backsight rods, and the level instrument module is detachably connected to the level instrument. The stadia rod modules and the level instrument module have identical hardware structures.

[0020] The workflow of a leveling measurement device includes at least the following steps: S110: The leveling instrument module receives the distance and height information sent by the two sight rod modules, and, after calibration, determines the horizontal distance and elevation difference between the leveling instrument, the foresight rod, and the backsight rod, in conjunction with the distance and height information it has collected.

[0021] S120: The leveling instrument module sends the horizontal distance and the elevation difference to the two stadia modules.

[0022] S130: If the horizontal distance and / or the elevation difference meet the preset alarm conditions, the level module and / or the stadia module will issue an alarm.

[0023] In the embodiments of this application, the sight rod module measures its own distance and height information and sends it to the leveling instrument module. The leveling instrument module measures its own distance and height information, and simultaneously corrects all distance and height information (including that acquired by itself and received from the sight rod module) to determine the horizontal distance and elevation difference between the leveling instrument, the foresight rod, and the backsight rod. Calibration of the distance and height information improves the accuracy of the determined horizontal distance and elevation difference. The leveling instrument module then sends the horizontal distance and elevation difference to both sight rod modules.

[0024] The leveling instrument module and the stadia module analyze whether the horizontal distance and elevation difference meet the preset alarm conditions. If they do, an alarm command is generated. The preset alarm conditions are set based on the measurement requirements, such as setting thresholds for horizontal distance and elevation difference. An alarm is triggered when the corresponding thresholds are exceeded.

[0025] In this embodiment, the foresight and level instruments can be deployed effectively in a few or even single operations based on alarm prompts, significantly reducing the number of movements required and improving operational efficiency. Furthermore, the accuracy of the determined horizontal distance and elevation difference is improved by calibrating the distance and height information.

[0026] In some embodiments, such as Figure 3 As shown, both the stadia rod module and the level module include a processor 110, a distance measurement module 120, a height measurement module 130, a communication module 140, an alarm module 160, a power supply module 170, a display screen 180, and a parameter calibration module 150. The distance measurement module 120, height measurement module 130, communication module 140, alarm module 160, power supply module 170, display screen 180, and parameter calibration module 150 of the stadia rod module and the level module have the same functions, but the processor 110 of the two modules has different functions.

[0027] The ranging module 120 is used to measure the distance data between itself and other targets, the height measurement module 130 is used to measure the height data of its own location, the communication module 140 is used to send the distance data and the height data to the communication target, and the parameter calibration module 150 is used to calibrate the distance data and / or the height data.

[0028] The power module 170 is used to power other modules. The power module 170 includes a rechargeable battery. In addition, since leveling systems are mostly used for field engineering surveys, a solar charging module can be configured as an alternative to ensure reliability.

[0029] The display screen 180 is used to display data to be displayed, including but not limited to distance data between itself and other targets measured by the ranging module 120, height data of its own location measured by the height measuring module 130, and horizontal distance and elevation difference between the stadia module and the level module. Operators can intuitively understand the relevant position data of the stadia module and the level module through the display screen 180. The type and display method of the data to be displayed on the display screen 180 can be freely set according to needs. For example, a temperature and humidity acquisition module can also be configured to display the acquired temperature and humidity data on the display screen 180.

[0030] Specifically, the processor 110 of the stadia module receives distance and height information measured by its own distance measuring module 120 and height measuring module 130, and transmits this information to the leveling module via its own communication module 140. The processor 110 of the leveling module also receives distance and height information measured by its own distance measuring module 120 and height measuring module 130, while simultaneously receiving the distance and height information measured by the distance measuring module 120 and height measuring module 130 of the stadia module via the communication module 140. The leveling module calibrates the aforementioned data using the parameter calibration module 150, then analyzes the horizontal distance and elevation difference between the leveling modules, and transmits this horizontal distance and elevation difference to the stadia module via the communication module 140.

[0031] Then, the processor 110 of the sight scale module receives the horizontal distance and elevation difference between the sight scale module and the level instrument module sent by the level instrument module through the communication module 140. The processor 110 of the sight scale module analyzes whether the horizontal distance and elevation difference meet the preset alarm conditions. If they do, an alarm command is generated, and the processor 110 of the sight scale module controls its own alarm module 160 to issue an alarm based on the alarm command. The preset alarm conditions are set based on the measurement requirements, such as setting thresholds for the horizontal distance and elevation difference. If the threshold is exceeded, an alarm is issued. The alarm method depends on the type of alarm module 160. The alarm module 160 includes, but is not limited to, a buzzer and an LED.

[0032] Similarly, the processor 110 of the level instrument module analyzes whether the horizontal distance and elevation difference meet the preset alarm conditions. If they do, an alarm command is generated, and the processor 110 controls the alarm module 160 of the level instrument module to issue an alarm based on the alarm command. The preset alarm conditions are set based on the measurement requirements, such as setting thresholds for horizontal distance and elevation difference. If the corresponding thresholds are exceeded, an alarm is issued, and the alarm method depends on the type of alarm module 160.

[0033] In some embodiments, the ranging module 120 includes a wireless two-way ranging module, such as a UWB module, and a wireless two-way ranging antenna, such as a UWB antenna, connected to the UWB module. The altitude measurement module 130 is configured as a barometer and a thermometer. The parameter calibration module 150 includes a satellite positioning receiver, i.e., a differential GNSS receiver, and a satellite positioning antenna, i.e., a GNSS antenna, connected to the differential GNSS receiver. A UWB module (Ultra-Wideband Module) is a wireless communication module based on ultra-wideband technology, characterized by high data transmission rate, low power consumption, high-precision positioning, and strong anti-interference capability. UWB ranging mainly relies on the TOF (Time of Flight Measurement) ranging method and belongs to two-way ranging technology. Since the initial error of each barometer is relatively large, the barometers of both the sight scale module and the level module need to be calibrated when they are started. For example, when the two sight scale modules and the level module are started, they are placed together (at the same altitude), and the barometer calibration unit reads the barometer value and calibrates it.

[0034] In some embodiments, such as Figure 4 As shown, S110: The leveling instrument module receives distance and height information sent by the two sight rod modules, and, combined with its own collected distance and height information, determines the horizontal distance and elevation difference between the leveling instrument, the foresight rod, and the backsight rod after calibration. This includes: the leveling instrument module receiving air pressure and temperature information sent by the two sight rod modules, and determining the elevation difference between the leveling instrument module and the sight rod module by combining its own collected air pressure and temperature information with preset barometer error parameters. The leveling instrument module acquires the distance information between itself and the sight rod module through the wireless two-way ranging module. The leveling instrument module determines the horizontal distance between itself and the sight rod module based on the elevation difference and the distance information.

[0035] Specifically, since the initial error of each barometer is relatively large, the barometers of the two sight scale modules and the level module need to be calibrated when they are started. The preset barometer error parameters are the calibration parameters obtained when calibrating the barometers of the two sight scale modules and the level module. In subsequent measurements, the initial data collected is calibrated and corrected by the preset barometer error parameters to improve the measurement accuracy.

[0036] The processor 110 of the sight scale module receives air pressure and temperature information sent by the two sight scale modules, and determines the elevation difference between the level module and the sight scale module by combining the air pressure and temperature information it has collected and the preset barometer error parameters.

[0037] The leveling instrument module obtains the distance information between itself and the stadia module through the UWB module. Since the leveling instrument module and the stadia module are not necessarily at the same horizontal level, the distance information obtained by the UWB module is the straight-line distance between them. Therefore, the leveling instrument module determines the horizontal distance between itself and the stadia module based on the elevation difference and the distance information.

[0038] In some embodiments, such as Figure 4 As shown, S110: Before the leveling instrument module receives the distance and height information sent by the two sight rod modules, and combines it with its own collected distance and height information to determine the horizontal distance and elevation difference between the leveling instrument, the foresight rod, and the backsight rod after calibration, the following steps are also included: powering on the leveling instrument module and the two sight rod modules, and completing the barometer calibration through the parameter calibration module 150. For example... Figure 5 As shown, specifically, the process includes: the leveling instrument module and the two sight rod modules detecting that the satellite positioning receiver has entered dynamic carrier phase differential positioning mode. The leveling instrument module receives calibration pressure and calibration temperature information sent by the two sight rod modules. The leveling instrument module obtains the three-dimensional relative coordinates of the two sight rod modules relative to itself through the satellite positioning receiver. The leveling instrument module determines the barometer error parameters based on the calibration pressure information, the calibration temperature information, and the three-dimensional relative coordinates, and sends the barometer error parameters to the two sight rod modules. The leveling instrument module is configured as a base station for dynamic carrier phase differential positioning.

[0039] Specifically, during engineering surveying, the level module and two stadia modules are powered on, and then the barometer is calibrated through the parameter calibration module 150.

[0040] When the parameter calibration module 150 includes a differential GNSS receiver and a GNSS antenna connected to the differential GNSS receiver, since GNSS needs to enter the dynamic carrier phase differential positioning mode, i.e., RTK mode, to obtain the best positioning effect, one of the three auxiliary instruments needs to be used as a base station while remaining stationary. The base station transmits RTCM data to the other two auxiliary instruments through the wireless communication module 140, so that the GNSS of the other two auxiliary instruments enters RTK mode.

[0041] In this embodiment, the leveling instrument module is set as the base station for RTK differential positioning. The leveling instrument module and the two sight rod modules detect the differential GNSS receiver and enter RTK mode. The leveling instrument module receives calibration pressure and calibration temperature information sent by the two sight rod modules. The leveling instrument module obtains the three-dimensional relative coordinates of the two sight rod modules relative to the leveling instrument module through the differential GNSS receiver. The leveling instrument module determines the barometer error parameters based on the calibration pressure information, calibration temperature information, and three-dimensional relative coordinates, and sends the barometer error parameters to the two sight rod modules.

[0042] In some embodiments, such as Figure 6 As shown, the sight scale module and the level module have the same hardware structure. Both the sight scale module and the level module include an embedded processing unit (processor 0), a UWB module and a UWB antenna (distance measurement module), a barometer (altitude measurement module), a wireless communication module and a wireless communication antenna (communication module), a differential GNSS receiver and a GNSS antenna (parameter calibration module), a secondary power supply module, a rechargeable battery, a serial port screen (display screen), and a buzzer (alarm module).

[0043] UWB modules and UWB antennas can be used to measure the distance between each other.

[0044] MEMS barometers are used to measure the air pressure at the location of the module.

[0045] Wireless communication module, used for data exchange between modules.

[0046] A differential GNSS receiver is used to achieve RTK differential positioning among three modules. The level module acts as the base station, and the sight rod module acts as the rover. GNSS needs to enter RTK mode to achieve the best positioning results. Therefore, the level module acts as the base station while remaining stationary. The base station transmits RTCM data to the other two sight rod modules via a wireless communication module, enabling the GNSS of the other two sight rod modules to enter RTK mode.

[0047] Buzzer: Used for audible alarms to remind workers.

[0048] Display screen: Used to display key information such as horizontal distance and elevation difference between modules.

[0049] The embedded processing unit mainly implements: 1) Acquisition function: used to acquire distance data from the module's own UWB, as well as barometric pressure data from the MEMS barometer and positioning results from the GNSS receiver.

[0050] 2) Communication control function: By controlling the wireless communication module, the three modules can communicate data such as distance, air pressure, temperature, RTK differential data, horizontal distance between modules, and elevation difference.

[0051] 3) Calculation function: This function is only implemented in the leveling module. It is used to calculate the elevation difference and horizontal distance difference based on the obtained inter-module distance, air pressure, temperature, RTK differential positioning results.

[0052] 4) Display control function: Controls the display screen to show the distance and elevation difference.

[0053] 5) Buzzer alarm control function: Based on the set horizontal distance alarm threshold and elevation difference alarm threshold, determine whether an alarm is needed. If an alarm is needed, control the buzzer to sound.

[0054] 6) Initial calibration function of barometric altimeter: Since the initial error of each barometer is relatively large, the processing unit reads the barometric pressure value and RTK result during each measurement and mapping operation, and calibrates the barometric pressure value.

[0055] Accordingly, this application also provides a leveling measurement method, applied to the leveling instrument module of the leveling measurement system described in any of the above embodiments, the method comprising: The system receives distance and height information from the two sight rod modules, combines this information with its own collected distance and height information, and determines the horizontal distance and elevation difference between the level, the foresight rod, and the backsight rod after calibration.

[0056] The horizontal distance and the elevation difference are sent to the two sight scale modules.

[0057] An alarm is triggered if the horizontal distance and / or the elevation difference meet the preset alarm conditions.

[0058] In some embodiments, receiving the distance and height information sent by the two sight rod modules, combining it with the distance and height information collected by the instrument itself, and determining the horizontal distance and elevation difference between the level, the foresight rod, and the backsight rod after calibration includes: The system receives air pressure and temperature information from the two sight rod modules, and determines the elevation difference between the level module and the sight rod module by combining the air pressure and temperature information it collects with preset barometer error parameters.

[0059] The distance information between itself and the ruler module is obtained through the UWB module.

[0060] The horizontal distance between the ruler module and the elevation difference is determined based on the elevation difference and the distance information.

[0061] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0062] In this disclosure, unless otherwise expressly specified and limited, ordinal numbers, such as "first," "second," etc., are used only to distinguish and describe related objects, and should not be construed as indicating or implying the relative importance or order between related objects. Furthermore, ordinal numbers do not represent the quantity of related objects.

[0063] "Multiple" includes two or more, and other classifiers are similar.

[0064] The terms "or" and "and / or" in this disclosure are used to describe relationships between related objects, indicating a non-exclusive inclusion. For example, "A and / or B" and "A or B" can both include: "A alone," "B alone," or "A and B," where "A" and "B" can include a single object or multiple objects. Similarly, "A, B and / or C," "A, B or C," and "A, B and C" can both include: "A alone," "B alone," "C alone," "A and B," "A and C," "B and C," or "A, B and C," where "A," "B," and "C" can include a single object or multiple objects. Additionally, the " / " in this disclosure is used to indicate an "or" relationship between related objects. The meanings of "at least one of A or B" and "one or more of A and B" in this disclosure are the same as the meaning of "A or B" above. The meanings of "one or more of A, B, and C" and "at least one of A, B, or C" are the same as the meaning of "A, B, or C" above. The meaning of "one or more of A, B, and C" is the same as the meaning of "A, B, or C" above.

[0065] In the above embodiments, the descriptions of each embodiment have their own emphasis. Parts not described in detail or in a particular embodiment can be referred to in the relevant descriptions of other embodiments. Furthermore, the above embodiments can be freely combined as needed.

Claims

1. A leveling system, characterized in that, The leveling system includes a level instrument, a foresight rod, a backsight rod, two rod modules, and a level instrument module. The rod modules and the level instrument module have the same hardware structure. The foresight rod and the backsight rod are respectively located on both sides of the level instrument. The two rod modules are respectively located on the foresight rod and the backsight rod. The level instrument module is located on the level instrument. The rod modules and the level instrument module are communicatively connected. The leveling instrument module receives distance and height information sent by the two sight rod modules, and combines it with its own collected distance and height information. After calibration, it determines the horizontal distance and elevation difference between the leveling instrument, the foresight rod, and the backsight rod. The leveling instrument module sends the horizontal distance and the elevation difference to the two sight rod modules; If the horizontal distance and / or the elevation difference meet the preset alarm conditions, the level module and / or the sight rod module will issue an alarm.

2. The leveling system according to claim 1, characterized in that, The sight ruler module and the level module include a distance measuring module, a height measuring module, a communication module, and a parameter calibration module; the distance measuring module is used to measure the distance data between itself and other targets, the height measuring module is used to measure the height data of its own location, the communication module is used to send the distance data and the height data to the communication target, and the parameter calibration module is used to calibrate the distance data and / or the height data.

3. The leveling system according to claim 2, characterized in that, The ranging module includes a wireless two-way ranging module and a wireless two-way ranging antenna connected to the wireless two-way ranging module. The altitude measurement module is configured as a barometer and a thermometer. The parameter calibration module includes a satellite positioning receiver and a satellite positioning antenna connected to the satellite positioning receiver.

4. The leveling system according to claim 3, characterized in that, The leveling module receives distance and height information from the two sight rod modules, and, after calibration, determines the horizontal distance and elevation difference between the leveling instrument, the foresight rod, and the backsight rod, including: The leveling module receives air pressure and temperature information sent by the two sight rod modules, and determines the elevation difference between the leveling module and the sight rod module by combining its own collected air pressure and temperature information with preset barometer error parameters. The level module obtains distance information between itself and the stadia module through the wireless two-way ranging module; The leveling instrument module determines the horizontal distance between itself and the stadia module based on the elevation difference and the distance information.

5. The leveling system according to claim 4, characterized in that, Before the leveling instrument module receives distance and height information from the two sight rod modules, and combines this information with its own collected distance and height information to determine the horizontal distance and elevation difference between the leveling instrument, the foresight rod, and the backsight rod after calibration, the following steps are also included: The leveling instrument module and the two sight rod modules are powered on, and the barometer is calibrated through the parameter calibration module.

6. The leveling system according to claim 5, characterized in that, The barometer calibration includes: The leveling instrument module and the two sight rod modules detected that the satellite positioning receiver had entered the dynamic carrier phase differential positioning mode. The level module receives calibration air pressure information and calibration temperature information sent by the two sight rod modules; The leveling module obtains the three-dimensional relative coordinates of the two spectral scale modules with respect to the leveling module through the satellite positioning receiver; The leveling instrument module determines the barometer error parameters based on the calibration air pressure information, the calibration temperature information, and the three-dimensional relative coordinates, and sends the barometer error parameters to the two sight scale modules.

7. The leveling system according to claim 6, characterized in that, The leveling instrument module is configured as a base station for dynamic carrier phase differential positioning.

8. The leveling system according to any one of claims 1-7, characterized in that, The sight ruler module and the level module also include a display screen, which is used to display the horizontal distance and / or the elevation difference.

9. A leveling method, characterized in that, The method, applied to a leveling instrument module in any one of claims 1-8, comprises: The system receives distance and height information from the two sight rod modules, combines it with its own collected distance and height information, and determines the horizontal distance and elevation difference between the level, the foresight rod, and the backsight rod after calibration. The horizontal distance and the elevation difference are sent to the two sight scale modules; An alarm is triggered if the horizontal distance and / or the elevation difference meet the preset alarm conditions.

10. The leveling method according to claim 9, characterized in that, The process of receiving distance and height information from the two sight rod modules, combining this information with its own collected distance and height information, and determining the horizontal distance and elevation difference between the level, the foresight rod, and the backsight rod after calibration, includes: The system receives air pressure and temperature information from the two sight rod modules, and determines the elevation difference between the level module and the sight rod module by combining the air pressure and temperature information it collects with preset barometer error parameters. The distance information between itself and the ruler module is obtained through a wireless two-way ranging module; The horizontal distance between the ruler module and the elevation difference is determined based on the elevation difference and the distance information.

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