Leveling position reminding device

Abstract

The invention discloses a leveling position reminding device, and relates to the technical field of leveling, the device discloses a level gauge body, the level gauge body is provided with a control reminder, the control reminder comprises a level gauge stand module, a sight distance adjusting module and a control reminding module, through the arrangement of the level gauge stand module for controlling the reminder, the stand position and the stand process of the level gauge can be deeply analyzed before leveling, the reasonable stand position of the level gauge is effectively judged, and the subsequent accurate measurement of the level gauge is ensured; whether the current leveling precision needs to be adjusted or not is efficiently judged by analyzing the sum of the rear sight distance of the leveling instrument and the design sight distance of the preset measurement level, and the subsequent leveling precision is ensured by combining the two adjustment modes.

Description

Technical Field

[0001] The present invention relates to the technical field of level measurement, and more specifically, to a level measurement position reminding device. Background Art

[0002] A level is an instrument that establishes a horizontal line of sight to measure the height difference between two points on the ground. The principle is to measure the height difference between ground points based on the principle of leveling. The current level requires manual adjustment of the instrument body, front scale, and rear scale before measurement. The efficiency of manual adjustment is not high, and the accuracy of adjustment cannot be guaranteed. How to provide effective position reminders and auxiliary adjustments when adjusting the position of the instrument body, front scale, and rear scale is a problem that needs to be solved urgently. Summary of the invention

[0003] In view of the deficiencies in the prior art, an object of the present invention is to provide a level measurement position reminder device.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A leveling measurement position reminder device comprises a leveling instrument body, the leveling instrument body is provided with a control reminder, the control reminder comprises a leveling instrument mounting module, a sight distance adjustment module, and a control reminder module;

[0006] The leveling instrument stationing module is used to adjust the leveling instrument body to a preset measurement level, and control the leveling instrument and the front ruler of the leveling instrument body to move forward synchronously, and determine the stationing position of the leveling instrument based on the comparison result of the stationing value and its threshold value;

[0007] After the level is set up, the sight distance adjustment module obtains the back sight distance of the level and the design sight distance S of the preset measurement level. 设 , according to the rear sight distance and the design sight distance S 设 Determine whether to issue a reminder signal based on the comparison result of the back movement analysis value and the threshold value, and adjust the position of the level or the preset measurement level based on the comparison result of the back movement analysis value and the threshold value;

[0008] The control reminder module is used to control the front ruler to continue to move forward, and obtain the front and rear sight distance difference △S of the level and the design sight distance difference △S of the preset measurement level. 设 , based on the front and rear sight distance difference △ and the design sight distance difference △S 设 The comparison result reminds the front ruler and adjusts the position of the front ruler.

[0009] Further, the level and the front scale of the level body are controlled to move forward synchronously, and the mounting position of the level is determined based on the comparison result of the mounting value and its threshold value, specifically: after the rear scale of the level body is fixed, the level and the front scale of the level body are controlled to move forward synchronously, wherein the moving speed of the level and the front scale is the same;

[0010] During the movement of the level instrument, a station setting analysis record of the level instrument is generated every e time. The station setting value is obtained according to the station setting analysis record, and the station setting threshold is set. When the station setting value is greater than or equal to the station setting threshold, the level instrument is set at the current position. When the station setting value is less than the station setting threshold, the level instrument continues to move.

[0011] Furthermore, the station analysis record includes the station analysis time, the frequency of turbulence, and the angle change.

[0012] Furthermore, the bump frequency recorded by the station analysis is obtained in the following way: the bump amplitude of the level within the time length e is obtained in real time, and a preset bump amplitude is set. When the bump amplitude of the level is greater than or equal to the preset bump amplitude, the bump frequency is increased by one, and the current time is marked as the bump moment. The bump frequency of the level within the time length e is summed up to obtain the total bump frequency recorded by the station analysis, and marked as DBS. All bump moments of the level within the time length e are sorted in chronological order, and the time difference between the two adjacent bump moments after sorting is calculated to obtain the bump interval. All bump intervals are summed up and averaged to obtain the average bump interval, and marked as JGP. The formula is used The turbulence frequency PCL recorded by the station analysis is obtained, where a1 is the total turbulence coefficient and a2 is the average turbulence interval coefficient.

[0013] Furthermore, the angle variation recorded in the station analysis is obtained in the following way: obtain the measurement angle of the level in the time length e in real time, set the measurement high angle and the measurement low angle, when the measurement angle is greater than the measurement high angle, mark the type of the measurement angle as the measurement upper angle type, when the measurement angle is less than the measurement high angle, mark the type of the measurement angle as the measurement lower angle type, when the measurement angle is between the measurement high angle and the measurement low angle, mark the type of the measurement angle as the measurement flat angle type, obtain the total number of angle changes FYK and the flat angle measurement interval SRT, and use the formula The angle change value BZJ recorded in the station analysis is obtained, where b1 is the total angle change coefficient and b2 is the flat angle measurement interval coefficient.

[0014] Furthermore, the total number of angle changes is obtained in the following way: sort all measured angles in chronological order of measurement time, compare the types of two adjacent measured angles after sorting, increase the number of angle changes by one when the types of two adjacent measured angles are different, sum the number of angle changes of the level within the time length e, obtain the total number of angle changes, and mark it as FYK.

[0015] Furthermore, the flat angle measurement average interval is obtained by the following method: obtain the corresponding measurement time of the flat angle type measurement angle, and mark it as the flat angle measurement time, sort all the flat angle measurement times in chronological order, calculate the time difference between the two adjacent flat angle measurement times after sorting, and obtain the flat angle measurement interval, sum all the flat angle measurement intervals and take the average, obtain the flat angle measurement average interval, and mark it as SRT.

[0016] Furthermore, the station value is obtained by the following method: obtain the bump frequency PCL and angle change value BZJ recorded by the station analysis, and use the formula The station value JZZ is obtained, where c1 is the turbulence frequency coefficient and c2 is the angle variation coefficient.

[0017] Furthermore, according to the rear sight distance and the design sight distance S 设 The comparison result of the back movement analysis value and the threshold value determines whether to issue a reminder signal, and obtains the back movement analysis value of the level based on the reminder signal, and adjusts the position of the level or the preset measurement level based on the comparison result of the back movement analysis value and its threshold value, specifically: obtain the back sight distance of the level and mark it as S 后 , obtain the design sight distance S of the preset measurement level 设 , when the backsight distance S 后 >Design sight distance S 设 When the back movement analysis value is greater than or equal to the back movement analysis threshold, the back sight distance S is set. 后 With design sight distance S 设 Perform difference calculation to obtain the sight distance adjustment distance, and move the level backward to the sight distance adjustment distance. When the backward analysis value is less than the backward analysis threshold, adjust the preset measurement level of the level until the design sight distance S of the preset measurement level is reached. 设 ≥ Rear sight distance S 后 ;

[0018] When the rear sight distance S 后 ≤ Design sight distance S 设 No corresponding processing is done;

[0019] The back movement analysis value of the level is obtained in the following way: obtain all the station analysis records of the level before the current time, obtain the station value of the station analysis record, sum up the station values ​​of all the station analysis records and take the average to obtain the average station value, and mark it as MSD, sort all the station analysis records in the order of station analysis time, calculate the difference between the two adjacent station values ​​after sorting and take the absolute value to obtain the station difference, set the station difference threshold, when the station difference is greater than or equal to the station difference threshold, increase the number of station deviations by one, sum up the number of station deviations of the level before the current time of the system, obtain the total number of station deviations, and mark it as SCJ, and use the formula The back movement analysis value FSW of the level instrument is obtained, where d1 is the average station value coefficient and d2 is the total number of station deviation coefficients.

[0020] Furthermore, the front and rear sight distance difference △S of the level and the design sight distance difference △S of the preset measurement level are obtained. 设 , based on the front and rear sight distance difference △ and the design sight distance difference △S 设 The comparison result reminds the front ruler and adjusts the position of the front ruler. Specifically, the front ruler is controlled to continue to move forward, and the front and rear sight distance difference △S of the level is obtained in real time. When the front and rear sight distance difference △S>0, the level sends a voice reminder of "forward sight distance difference △Sm" to the front ruler, and the front ruler is controlled to move forward △S. The current rear sight distance difference △S≤the designed sight distance difference △S 设 When the level gauge stops the front ruler from moving forward, the front ruler is controlled to stand still.

[0021] After the front ruler is fixed, calculate the distance W between the front and rear rulers and the height difference △H of the front and rear rulers to obtain the ruler length L. When the height difference △H of the front and rear rulers is greater than the ruler length L-30cm, send a reminder to the front ruler to move forward X, where X=3*W*(L-0.3) / 2*△H.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention provides a level setting module for controlling the reminder, which can conduct an in-depth analysis of the setting position and setting process of the level before leveling measurement, effectively determine the reasonable setting position of the level, and ensure the subsequent accurate measurement of the level;

[0024] 2. The present invention sets a sight distance adjustment module for controlling the reminder, which can efficiently determine whether the current leveling measurement accuracy needs to be adjusted by analyzing the sum of the rear sight distance of the level and the design sight distance of the preset measurement level, and ensure the subsequent leveling measurement accuracy by combining the two adjustment methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A flowchart for determining the station position of a level instrument;

[0026] Figure 2 A flowchart for adjusting the position or preset measurement level of a level. DETAILED DESCRIPTION

[0027] Reference Figure 1 to Figure 2

[0028] A leveling measurement position reminder device comprises a level body, on which a control reminder is arranged, and the control reminder comprises a level mounting module, a sight distance adjustment module and a control reminder module.

[0029] The level body includes a level, a front scale and a rear scale. The installation heights of the front scale and the rear scale need to be consistent, and both the front scale and the rear scale are leveling scales.

[0030] The leveling instrument station module adjusts the leveling instrument body to the preset measurement level (the preset measurement level is the initial measurement level of the leveling instrument body, and each measurement level corresponds to a design sight distance S 设 And the design sight distance difference △S 设 ).

[0031] The rear scale of the level body is fixed. After the rear scale of the level body is fixed, the level of the level body is controlled to move forward synchronously with the front scale, wherein the movement speed of the level and the front scale is the same.

[0032] During the movement of the level, a station analysis record of the level is generated every e. The station analysis record includes the station analysis time (the generation time of the station analysis record), the frequency of bumps, and the angle change. The station value is obtained according to the station analysis record, and the station threshold is set. The station threshold is a system-set threshold and can be adjusted and modified according to actual needs. When the station value is greater than or equal to the station threshold, the level is stationed at the current position. When the station value is less than the station threshold, the level continues to move.

[0033] The turbulence frequency recorded by the station analysis is obtained in the following way: obtain the turbulence amplitude of the level within the duration e in real time, set the preset turbulence amplitude, which is the preset amplitude and can be adjusted and modified according to actual needs. When the turbulence amplitude of the level is greater than or equal to the preset turbulence amplitude, increase the number of turbulences by one, and mark the current time as the turbulence moment. When the turbulence amplitude of the level is less than the preset turbulence amplitude, no corresponding processing is performed. The number of turbulences of the level within the duration e is summed up to obtain the total number of turbulences recorded by the station analysis and marked as DBS. All turbulence moments of the level within the duration e are sorted in chronological order. The time difference between the two adjacent turbulence moments after sorting is calculated to obtain the turbulence interval. All turbulence intervals are summed up and averaged to obtain the average turbulence interval, which is marked as JGP. The formula is used The turbulence frequency PCL recorded by the station analysis is obtained, where a1 is the total turbulence coefficient, a2 is the average turbulence interval coefficient, the value of a1 is 0.71, and the value of a2 is 0.79.

[0034] The angle variation recorded in the station analysis is obtained in the following way: the measurement angle of the level within the time length e is obtained in real time (the measurement angle is the angle formed between the level and the horizontal plane), and the measurement high angle and the measurement low angle are set. The measurement high angle and the measurement low angle are both preset angles and can be adjusted and modified according to actual needs. When the measurement angle is greater than the measurement high angle, the type of the measurement angle is marked as the measurement upper angle type. When the measurement angle is less than the measurement high angle, the type of the measurement angle is marked as the measurement lower angle type. When the measurement angle is between the measurement high angle and the measurement low angle, the type of the measurement angle is marked as the measurement flat angle type. All measurement angles are sorted in the order of measurement time. The types of two adjacent measured angles after sorting are compared. When the types of two adjacent measured angles are different, the angle change times are increased once. When the types of two adjacent measured angles are the same, no corresponding processing is performed. The angle change times of the level within the time length e are summed up to obtain the total number of angle changes and marked as FYK. The corresponding measurement time of the measured angle of the flat angle type is obtained and marked as the flat angle measurement time. All flat angle measurement times are sorted in chronological order. The time difference between the two adjacent flat angle measurement times after sorting is calculated to obtain the flat angle measurement interval. All flat angle measurement intervals are summed up and averaged to obtain the flat angle measurement average interval and marked as SRT. The formula is used The angle change value BZJ recorded in the station analysis is obtained, where b1 is the total angle change coefficient, b2 is the flat angle measurement interval coefficient, the value of b1 is 0.53, and the value of b2 is 0.69.

[0035] The station value is obtained by the following method: Get the bump frequency PCL and angle change value BZJ recorded in the station analysis, and use the formula The station value JZZ is obtained, where c1 is the turbulence frequency coefficient, c2 is the angle variation coefficient, the value of c1 is 0.46, and the value of c2 is 0.51.

[0036] By setting up the level instrument mounting module, you can conduct an in-depth analysis of the level instrument's mounting position and mounting process before leveling measurements, effectively determine the level instrument's reasonable mounting position, and ensure subsequent accurate level instrument measurements.

[0037] Sight adjustment module: After the level is set up, obtain the back sight of the level and mark it as S 后 , obtain the design sight distance S of the preset measurement level 设 , when the backsight distance S后 >Design sight distance S 设 When the back movement analysis value is greater than or equal to the back movement analysis threshold, the back sight distance S is set. 后 With design sight distance S 设 Perform difference calculation to obtain the sight distance adjustment distance, and move the level backward to the sight distance adjustment distance. When the backward analysis value is less than the backward analysis threshold, adjust the preset measurement level of the level until the design sight distance S of the preset measurement level is reached. 设 ≥ Rear sight distance S 后 , when the backsight distance S 后 ≤ Design sight distance S 设 No corresponding processing is performed.

[0038] The backward movement analysis value of the level is obtained in the following way: obtain all the station analysis records of the level before the current time, obtain the station value of the station analysis record, sum up the station values ​​of all the station analysis records and take the average to obtain the average station value, and mark it as MSD, sort all the station analysis records in the order of the station analysis time, calculate the difference between the two adjacent station values ​​after sorting and take the absolute value to obtain the station difference, set the station difference threshold, the station difference threshold is the system setting threshold, which can be adjusted and modified according to actual needs, when the station difference is greater than or equal to the station difference threshold, the station deviation times are increased once, when the station difference is less than the station difference threshold, no corresponding processing is performed, the station deviation times of the level before the current system time are summed up to obtain the total station deviation times, and marked as SCJ, and the formula is used The back movement analysis value FSW of the level instrument is obtained, where d1 is the average station value coefficient, d2 is the total number of station deviation coefficients, the value of d1 is 3.85, and the value of d2 is 1.23.

[0039] A sight distance adjustment module is set up to efficiently determine whether the current leveling measurement accuracy needs to be adjusted by analyzing the sum of the back sight distance of the level and the design sight distance of the preset measurement level. The subsequent leveling measurement accuracy is guaranteed by combining the two adjustment methods.

[0040] Control reminder module: Control the front ruler to continue moving forward, obtain the front and rear sight distance difference △S of the level in real time, when the front and rear sight distance difference △S>0, control the front ruler to move forward △S (the level sends a voice reminder of "forward sight distance difference △Sm" to the front ruler, and the forward movement is relative to the level), the current rear sight distance difference △S≤the designed sight distance difference △S 设 When the front ruler is stopped, control it to stand still (the level gives a voice reminder of "stop moving the front ruler forward").

[0041] After the front ruler is fixed, calculate the distance W between the front and rear rulers and the height difference △H of the front and rear rulers, and obtain the ruler length L (the length of the front ruler and the rear ruler). When the height difference △H between the front and rear rulers is greater than the ruler length L-30cm, send a reminder of moving forward X to the front ruler (you can also "click" the front ruler voice transmission button on the display for manual voice reminder), and the level adjusts its position according to the front and rear sight distance difference.

[0042] After the measurement of the first station is completed, switch the front and rear scales on the level end device, the front scale becomes the rear scale, and the rear scale becomes the front scale; X=3*W*(L-0.3) / 2*△H, repeat the above steps until the measurement section is completed.

[0043] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters in the formula are set by technicians in this field according to actual conditions.

[0044] The above embodiments can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented by software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state hard disk.

[0045] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0046] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0047] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0048] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0049] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks or optical disks.

[0050] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A level measurement position reminder device, characterized in that: It includes a level body, on which a control reminder is arranged, and the control reminder includes a level stand module, a sight distance adjustment module, and a control reminder module; The leveling instrument stationing module is used to adjust the leveling instrument body to a preset measurement level, and control the leveling instrument and the front ruler of the leveling instrument body to move forward synchronously, and determine the stationing position of the leveling instrument based on the comparison result of the stationing value and its threshold value; After the level is set up, the sight distance adjustment module obtains the back sight distance of the level and the design sight distance S of the preset measurement level. 设 , according to the rear sight distance and the design sight distance S 设 Determine whether to issue a reminder signal based on the comparison result of the back movement analysis value and the threshold value, and adjust the position of the level or the preset measurement level based on the comparison result of the back movement analysis value and the threshold value; The control reminder module is used to control the front ruler to continue to move forward, and obtain the front and rear sight distance difference △S of the level and the design sight distance difference △S of the preset measurement level. 设 , based on the front and rear sight distance difference △ and the design sight distance difference △S 设 The comparison result reminds the front ruler and adjusts the position of the front ruler.

2. A level measurement position reminder device according to claim 1, characterized in that: The level and the front scale of the level body are controlled to move forward synchronously, and the mounting position of the level is determined based on the comparison result of the mounting value and its threshold value, specifically: after the rear scale of the level body is fixed, the level and the front scale of the level body are controlled to move forward synchronously, wherein the movement speed of the level and the front scale is the same; During the movement of the level instrument, a station setting analysis record of the level instrument is generated every e time. The station setting value is obtained according to the station setting analysis record, and the station setting threshold is set. When the station setting value is greater than or equal to the station setting threshold, the level instrument is set at the current position. When the station setting value is less than the station setting threshold, the level instrument continues to move.

3. A level measurement position reminder device according to claim 2, characterized in that: The station analysis record includes the station analysis time, bump frequency, and angle change.

4. A level measurement position reminder device according to claim 3, characterized in that: The turbulence frequency recorded by the station analysis is obtained in the following way: obtain the turbulence amplitude of the level within the time length e in real time, set the preset turbulence amplitude, when the turbulence amplitude of the level is greater than or equal to the preset turbulence amplitude, increase the turbulence times by one, and mark the current time as the turbulence moment, sum the turbulence times of the level within the time length e, obtain the total turbulence times recorded by the station analysis, and mark it as DBS, sort all the turbulence moments of the level within the time length e in chronological order, calculate the time difference between the two adjacent turbulence moments after sorting, obtain the turbulence interval, sum all the turbulence intervals and take the average, obtain the average turbulence interval, and mark it as JGP, and use the formula The turbulence frequency PCL recorded by the station analysis is obtained, where a1 is the total turbulence coefficient and a2 is the average turbulence interval coefficient.

5. A level measurement position reminder device according to claim 3, characterized in that: The angle variation recorded in the station analysis is obtained in the following way: obtain the measurement angle of the level in time e in real time, set the measurement high angle and measurement low angle, when the measurement angle is greater than the measurement high angle, mark the measurement angle type as the measurement upper angle type, when the measurement angle is less than the measurement high angle, mark the measurement angle type as the measurement lower angle type, when the measurement angle is between the measurement high angle and the measurement low angle, mark the measurement angle type as the measurement flat angle type, obtain the total number of angle changes FYK and the flat angle measurement interval SRT, and use the formula The angle change value BZJ recorded in the station analysis is obtained, where b1 is the total angle change coefficient and b2 is the flat angle measurement interval coefficient.

6. A level measurement position reminder device according to claim 5, characterized in that: The total number of angle changes is obtained in the following way: sort all measured angles in chronological order of measurement time, compare the types of two adjacent measured angles after sorting, increase the number of angle changes by one when the types of two adjacent measured angles are different, sum the number of angle changes of the level within the time length e, obtain the total number of angle changes, and mark it as FYK.

7. A level measurement position reminder device according to claim 5, characterized in that: The flat angle measurement average interval is obtained in the following way: obtain the corresponding measurement time of the flat angle type measurement angle, and mark it as the flat angle measurement time, sort all the flat angle measurement times in chronological order, calculate the time difference between the two adjacent flat angle measurement times after sorting, and obtain the flat angle measurement interval, sum up all the flat angle measurement intervals and take the average value to obtain the flat angle measurement average interval, and mark it as SRT.

8. A level measurement position reminder device according to claim 7, characterized in that: The station value is obtained by the following method: Get the bump frequency PCL and angle change value BZJ recorded in the station analysis, and use the formula The station value JZZ is obtained, where c1 is the turbulence frequency coefficient and c2 is the angle variation coefficient.

9. A level measurement position reminder device according to claim 1, characterized in that: According to the rear sight distance and the design sight distance S 设 The comparison result of the backsight of the level is used to determine whether to issue a reminder signal, and the backsight analysis value of the level is obtained based on the reminder signal. The position of the level or the preset measurement level is adjusted based on the comparison result of the backsight analysis value and its threshold value. Specifically, the backsight distance of the level is obtained and marked as S 后 , obtain the design sight distance S of the preset measurement level 设 , when the backsight distance S 后 >Design sight distance S 设 When the back movement analysis value is greater than or equal to the back movement analysis threshold, the back sight distance S is set. 后 With design sight distance S 设 Perform difference calculation to obtain the sight distance adjustment distance, and move the level backward to the sight distance adjustment distance. When the backward analysis value is less than the backward analysis threshold, adjust the preset measurement level of the level until the design sight distance S of the preset measurement level is reached. 设 ≥ Rear sight distance S 后 ; When the rear sight distance S 后 ≤ Design sight distance S 设 No corresponding processing is done; The back movement analysis value of the level is obtained in the following way: obtain all the station analysis records of the level before the current time, obtain the station value of the station analysis record, sum up the station values ​​of all the station analysis records and take the average to obtain the average station value, and mark it as MSD, sort all the station analysis records in the order of station analysis time, calculate the difference between the two adjacent station values ​​after sorting and take the absolute value to obtain the station difference, set the station difference threshold, when the station difference is greater than or equal to the station difference threshold, increase the number of station deviations by one, sum up the number of station deviations of the level before the current time of the system, obtain the total number of station deviations, and mark it as SCJ, and use the formula The back movement analysis value FSW of the level instrument is obtained, where d1 is the average station value coefficient and d2 is the total number of station deviation coefficients.

10. The level measurement position reminder device according to claim 1, characterized in that: Obtain the front and rear sight distance difference △S of the level and the design sight distance difference △S of the preset measurement level 设 , based on the front and rear sight distance difference △ and the design sight distance difference △S 设 The comparison result reminds the front ruler and adjusts the position of the front ruler. Specifically, the front ruler is controlled to continue to move forward, and the front and rear sight distance difference △S of the level is obtained in real time. When the front and rear sight distance difference △S>0, the level sends a voice reminder of "forward sight distance difference △Sm" to the front ruler, and the front ruler is controlled to move forward △S. The current rear sight distance difference △S≤the designed sight distance difference △S 设 When the level gauge stops the front ruler from moving forward, the front ruler is controlled to stand still. After the front ruler is fixed, calculate the distance W between the front and rear rulers and the height difference △H of the front and rear rulers to obtain the ruler length L. When the height difference △H of the front and rear rulers is greater than the ruler length L-30cm, send a reminder to the front ruler to move forward X, where X=3*W*(L-0.3) / 2*△H.

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