Intelligent measurement and control method and system for height difference of steel member

Abstract

The invention belongs to the technical field of intelligent measurement and control of steel members, and particularly relates to an intelligent measurement and control method and system for the height difference of a steel member. Reading the magnetic suction devices in sequence through the electronic level gauge, and transmitting the obtained inclination reading to the cloud monitoring platform in real time; the cloud monitoring platform calculates a tilt correction value according to the tilt readings obtained by the magnetic suction devices, and performs tilt correction on the tilt readings of the magnetic suction devices to obtain vertical readings of the magnetic suction devices; calculating a height difference adjustment value of each measuring point by taking a weighted average value of the vertical readings of the magnetic suction devices as a reference value; and acquiring the height difference adjustment value of each measuring point through the client APP, and synchronously driving the adjustment execution module of each measuring point below the steel member bottom die until the height difference of all the measuring points meets the preset precision requirement. According to the invention, the multi-measuring-point height difference measurement precision and efficiency of the large-area steel member are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent measurement and control of steel components, and specifically relates to a method and system for intelligent measurement and control of height differences of steel components. Background Art

[0002] The traditional method for measuring the height difference of large-area steel components is to set up a level near the steel component, manually set up a ruler point by point, read the readings point by point, record manually, and manually calculate the height difference of multiple measuring points of the steel component. When adjusting, set up the ruler point by point, read the readings point by point, and gradually adjust the height difference of each measuring point until the height difference of each measuring point meets the requirements. The disadvantages of this traditional measurement technology are low efficiency of manual ruler setting, easy errors in manual reading, recording and calculation, poor vision during nighttime operation, low level of automation and informatization, and can only adjust single points in sequence. The personnel and instruments take up a long time, the process conversion efficiency is low, and the construction period pressure is high. In order to solve the above technical problems, the present invention designs a method and system for intelligent measurement and control of the height difference of steel components. Summary of the invention

[0003] Purpose of the invention: The purpose of the present invention is to address the deficiencies in the prior art and provide a method and system for intelligent measurement and control of height differences of steel components, thereby improving the accuracy and efficiency of height difference measurement of large-area steel components at multiple measuring points.

[0004] Technical solution: The intelligent measurement and control method for height difference of steel components of the present invention comprises the following steps:

[0005] S1: attaching a plurality of magnetic devices to designated measuring points of the bottom mold of the steel component in order of size, wherein the magnetic devices are provided with barcode stickers;

[0006] S2: reading the barcode stickers of the magnetic devices in sequence using an electronic level to obtain the tilt readings of each magnetic device;

[0007] S3: Calculating the tilt correction value according to the tilt reading of the magnetic device, including: obtaining the maximum tilt reading, the minimum tilt reading and the corresponding distance between the measuring points in the horizontal and vertical directions; calculating the horizontal axis tilt angle and the vertical axis tilt angle by using the inverse tangent function; correcting the tilt reading by using the horizontal axis tilt angle and the vertical axis tilt angle to obtain the tilt correction value; performing tilt correction on the tilt reading of each magnetic device by using the tilt correction value to obtain the vertical reading of each magnetic device;

[0008] S4: Calculate the weighted average of the vertical readings of each magnetic device as the reference value:

[0009] S5: Calculate the height difference adjustment value of each measuring point according to the difference between the vertical reading of each magnetic device and the reference value;

[0010] S6: Based on the height difference adjustment value of each measuring point, the adjustment execution module of each measuring point below the bottom mold of the steel component is synchronously driven, so that the height difference adjustment operation of multiple measuring points is performed simultaneously until the height difference of all measuring points meets the preset accuracy requirement.

[0011] To further improve the above technical solution, in step S1, the adsorption spacing of the magnetic suction device is set according to the size of the bottom mold of the steel component and the load distribution, and the distance error between adjacent magnetic suction devices does not exceed ±10cm.

[0012] Further, in step S3,

[0013] The transverse axial inclination angle The calculation formula is: ,

[0014] The longitudinal axial inclination angle The calculation formula is: ,

[0015] The tilt correction value The calculation formula is: ,

[0016] Where: Indicates the tilt reading of each magnetic device. Indicates the size, , Indicates the maximum horizontal axis tilt reading of the measuring point. Indicates the minimum horizontal axis tilt reading of the measuring point. Indicates the distance between the maximum and minimum tilt readings on the horizontal axis of the measuring point. Indicates the maximum tilt reading of the longitudinal axis of the measuring point. Indicates the minimum tilt reading of the longitudinal axis of the measuring point. Indicates the distance between the maximum tilt reading and the minimum tilt reading of the longitudinal axis of the measuring point;

[0017] The vertical readings of each magnetic attraction device The calculation formula is:

[0018] .

[0019] Furthermore, in step S4, the reference value calculation formula is: ,

[0020] Where: , , is the weight of the vertical reading of each magnetic device, is the vertical reading of each magnetic device, It is the arithmetic mean of the vertical readings of each magnetic device;

[0021] In step S5, the height difference adjustment value The calculation formula is: .

[0022] Further, in step S6, the height difference adjustment operation includes: synchronously generating control instructions according to the height difference adjustment value, driving the adjustment execution modules of each measuring point to simultaneously lift or lower according to a preset ratio; after the adjustment is completed, re-execute steps S2 to S6, the electronic level continuously collects tilt readings and updates the height difference adjustment value, and generates secondary control instructions according to the updated height difference adjustment value until the height difference of all measuring points meets the second-class leveling accuracy requirements.

[0023] The steel component height difference intelligent measurement and control system for realizing the above steel component height difference intelligent measurement and control method comprises:

[0024] Multiple magnetic devices are attached to the designated measuring points of the bottom form of the steel structure with the face facing the electronic level. The magnetic devices are arranged in scale order, and the adsorption spacing is set according to the size of the bottom form of the steel structure and the load distribution. The distance error between the scales of adjacent magnetic devices does not exceed ±10cm.

[0025] An electronic level, used to read the barcode sticker on the magnetic device, and transmit the obtained tilt reading in real time through a network communication module;

[0026] The cloud monitoring platform includes: a data storage unit for receiving and storing the tilt readings transmitted by the electronic level; a calculation unit for performing horizontal and vertical axis tilt corrections on the tilt readings of the magnetic devices to obtain the vertical readings of each magnetic device and obtain a reference value by calculating the weighted average of each vertical reading, and obtain an elevation adjustment value according to the difference between the vertical reading of each magnetic device and the reference value; a data transmission unit for pushing the elevation adjustment value to a client APP;

[0027] Client APP, used to display real-time height difference adjustment value, height difference adjustment progress and warning information, and generate control instructions;

[0028] The adjustment execution module is installed at each measuring point below the bottom form of the steel component. It is used to synchronize actions according to the control instructions of the client APP to achieve multi-point height difference adjustment.

[0029] Furthermore, the magnetic device includes an aluminum alloy ruler body, a ferrite magnet fixed to the bottom of the aluminum alloy ruler body, a barcode sticker attached to the front of the aluminum alloy ruler body, and LED light strips installed on both sides of the front of the aluminum alloy ruler body; the zero point of the barcode sticker is flush with the bottom of the ruler body; the LED light strip is connected to an external lithium battery power supply and a power switch through a power cord, and the external lithium battery power supply and the power switch are fixed to the upper right side of the aluminum alloy ruler body by screws to provide lighting during nighttime operations.

[0030] Furthermore, the cloud monitoring platform stores the tilt correction value and the height difference adjustment value in a database, and pushes the height difference adjustment value to the client APP in real time through a network communication module.

[0031] Furthermore, the client APP includes: a data visualization interface, an early warning module, and a report generation module; the data visualization interface is used to display the real-time height difference adjustment value, height difference adjustment progress and height difference adjustment history record of each measuring point; the early warning module is used to issue an alarm when the height difference deviation exceeds a preset threshold; the report generation module is used to automatically generate an acceptance report after the adjustment is completed.

[0032] Furthermore, the adjustment execution module includes multiple jacks and pad devices. The jacks of the adjustment execution module are connected to the client APP through a wireless communication protocol, and the adjustment step of each jack is in linear proportion to the height difference adjustment value to achieve multi-point synchronous adjustment.

[0033] Furthermore, the electronic level is equipped with a windproof bracket and a waterproof cover, and is suitable for working environments with wind speeds of level 5 or below or in rainy days.

[0034] Beneficial effect: Compared with the prior art, the advantages of the present invention are: the intelligent measurement and control method for the height difference of steel components provided by the present invention adopts a magnetic suction device to be adsorbed on the steel component to be tested, and the magnetic suction device has the advantages of light weight, durability, easy disassembly, and recyclability; the magnetic suction device can be automatically adsorbed on the specified position of the steel component without manual ruler holding, and the magnetic suction device is equipped with a lighting function at night, and can operate around the clock, greatly improving work efficiency; the magnetic suction device can be used to check the elevation, height difference, flatness, etc. of the steel component, and its measurement accuracy can meet the second-class leveling measurement requirements. During the measurement process, the magnetic suction device can be quickly adsorbed on the specified position on the surface of the steel component without the use of additional clamps or fixing devices, saving installation and adjustment time, making the device more stable during measurement and not easy to slide or shift, thereby improving the accuracy of measurement.

[0035] The intelligent measurement and control system is simple and efficient, with real-time data transmission, automatic recording, automatic calculation, high automation, and can be operated by one person and adjusted at multiple points at the same time. There is sufficient light at night, and it can operate around the clock, improving work efficiency and saving labor costs. The intelligent measurement and control system collects electronic level observation data in real time through the cloud monitoring platform. After data processing and analysis such as tilt correction, weighted average and height difference calculation, the client APP can view and quickly adjust the height difference of large-area steel components in real time. Its measurement accuracy can meet the requirements of second-class leveling, and it is suitable for the measurement and control of the elevation, height difference and flatness of steel components in all bridge construction. The present invention integrates functions such as magnet adsorption, night lighting, electronic reading assistance, electronic circuit design, cloud monitoring platform, and client APP. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A three-dimensional schematic diagram of the intelligent measurement and control method for height difference of steel components provided by the present invention;

[0037] Figure 2 This is a front view of the intelligent measurement and control method for height difference of steel components provided by the present invention;

[0038] Figure 3 This is a layout diagram of the magnetic attraction device in the intelligent measurement and control method for height difference of steel components provided by the present invention;

[0039] Figure 4 It is a schematic diagram of the overall structure of the magnetic attraction device in the present invention;

[0040] Figure 5 This is a front view of the magnetic attraction device of the present invention;

[0041] Figure 6 This is a vertical view of the magnetic attraction device of the present invention;

[0042] Figure 7 It is a top view of the magnetic attraction device of the present invention.

[0043] The reference numerals in the figure are: 10-magnetic device; 20-bottom mold of steel structure; 30-electronic level; H-horizontal sight line; 101-barcode sticker; 102-LED light strip; 103-ferrite magnet; 104-external lithium battery power supply; 105-power switch; 106-power cord; 107-aluminum alloy ruler body. DETAILED DESCRIPTION

[0044] The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0045] Example 1: Figure 1 , Figure 2 As shown, an electronic level is set up near the steel structure and it is precisely leveled. Multiple magnetic devices are facing the direction of the electronic level and are adsorbed on the designated measuring points of the bottom mold of the steel structure in sequence according to the size number. The barcode sticker on the magnetic device is read by the electronic level, and the collected readings of the magnetic device are uploaded to the cloud monitoring platform through network communication technology. After receiving the data, the cloud monitoring platform stores the data in a database, processes and analyzes the data, and pushes the processed data and analysis results to the client APP. On-site measurement personnel can view monitoring data, reports, early warning information, etc. in real time through the client APP, and adjust the height difference of each measuring point in real time according to the monitoring data results.

[0046] To facilitate adjustment and data calculation accuracy, each magnetic device is designated to stand on the vertical center line corresponding to each adjustment execution module. The number of magnetic devices depends on and is equal to the number of adjustment execution modules. To facilitate the calculation of the longitudinal and transverse axis inclination, the maximum and minimum longitudinal and transverse axis readings of each magnetic device are distinguished according to the distribution position on the bottom mold of the steel component. Figure 3 It can be seen that size numbers 1001 and 1012 are located in the horizontal direction, size numbers 1002 and 1011 are located in the horizontal direction, size numbers 1003 and 1010 are located in the horizontal direction, size numbers 1004 and 1009 are located in the horizontal direction, size numbers 1005 and 1008 are located in the horizontal direction, and size numbers 1006 and 1007 are located in the horizontal direction; size numbers 1001 and 1006 are located in the vertical direction, size numbers 1002-1005 are located in the vertical direction, size numbers 1007 and 1012 are located in the vertical direction, and size numbers 1008-1011 are located in the vertical direction.

[0047] The intelligent measurement and control method for height difference of steel components provided by the present invention is as follows:

[0048] Step 1: Place multiple magnetic devices facing the electronic level and attach them to the designated measuring points of the bottom mold of the steel component in the order of scale numbers (1001, 1002, ..., 1012), such as Figure 3 As shown, the magnetic device includes an aluminum alloy ruler body 107, a ferrite magnet 103 fixed to the bottom of the aluminum alloy ruler body 107, LED light strips 102 attached to both sides of the front of the aluminum alloy ruler body 107, and a barcode sticker 101 attached to the front of the aluminum alloy ruler body 107, and the zero point of the barcode sticker 101 is flush with the bottom of the aluminum alloy ruler body 107;

[0049] Step 2: Use the electronic level 30 to read the barcode stickers 101 on the aluminum alloy ruler 107 in turn, obtain the tilt readings of each magnetic device 10 and transmit them to the cloud monitoring platform in real time;

[0050] Step 3: The cloud monitoring platform calculates the tilt correction value based on the tilt reading of the magnetic device ,

[0051] (1)

[0052] The horizontal axis inclination angle The calculation formula is: (2)

[0053] Longitudinal axial inclination The calculation formula is: (3)

[0054] In the formula, Indicates the tilt reading of each magnetic device. Indicates the size, , Indicates the maximum horizontal axis tilt reading of the measuring point. Indicates the minimum horizontal axis tilt reading of the measuring point. Indicates the distance between the maximum and minimum tilt readings on the horizontal axis of the measuring point. Indicates the maximum tilt reading of the longitudinal axis of the measuring point. Indicates the minimum tilt reading of the longitudinal axis of the measuring point. Indicates the distance between the maximum tilt reading and the minimum tilt reading of the longitudinal axis of the measuring point;

[0055] According to the calculated tilt correction value Tilt readings for each magnetic device Perform tilt correction to obtain vertical readings of each magnetic device :

[0056] (4)

[0057] Step 4: Take the weighted average value L of the vertical readings of each magnetic device as the reference value:

[0058] (5)

[0059] (6)

[0060] (7)

[0061] in, is the weight of the vertical reading of each magnetic device, is the vertical reading of each magnetic device, It is the arithmetic mean of the vertical readings of each magnetic device;

[0062] Step 5: Calculate the height difference adjustment value of each measuring point :

[0063] (8)

[0064] in, is the vertical reading of each magnetic device, is the weighted average of the magnetic device readings;

[0065] Step 6: Obtain the height difference adjustment value of each measuring point through the client APP, and synchronously drive the adjustment execution module of each measuring point under the bottom mold of the steel component based on the height difference adjustment value, so that the height difference adjustment operations of multiple measuring points can be performed simultaneously until the height difference of all measuring points meets the preset accuracy requirements.

[0066] The present invention uses an electronic level to sequentially observe the magnetic devices adsorbed on multiple measuring points of the steel structure, transmits the data to the cloud monitoring platform in real time for tilt correction, and calculates the weighted average of the vertical readings of each magnetic device and the height difference of each measuring point. The multiple measuring points are adjusted synchronously to improve the measurement efficiency, effectively eliminate the error caused by the traditional manual ruler being not straight, and the measurement accuracy can reach the second-class leveling requirements. The important steps of the precision control of the present invention are that the horizontal distance between each magnetic device must be accurately counted, the readings of each magnetic device must be corrected for tilt in two directions, and the height difference data of each measuring point must be updated in real time during the adjustment process; during the measurement operation, there is no need for manual ruler support, and each magnetic device is sequentially adsorbed on each measuring point of the bottom mold in the order of the ruler number to prevent errors. When observing at night, turn on the ruler body light strip for lighting, hold an umbrella for the instrument on rainy days, and stop the operation when the wind is above level 5.

[0067] Example 2: Figure 1 The steel member height difference intelligent measurement and control system shown includes a magnetic device 10, an electronic level 30, a cloud monitoring platform, a client APP, an adjustment execution module, etc. The working principle is as follows: an electronic level 30 is set up near the steel member bottom mold 20 and leveled, and multiple magnetic devices 10 are adsorbed on the designated measuring points of the steel member bottom mold 20 in order of size numbers facing the direction of the electronic level 30; the electronic level 30 reads each magnetic device 10 in turn and uploads it to the cloud monitoring platform in real time; after receiving the data, the cloud monitoring platform stores the data in the database, processes and analyzes the data, and the cloud monitoring platform pushes the processed data and analysis results to the client APP. On-site surveyors can view monitoring data, reports, warning information, etc. in real time through the client APP, and adjust the height difference of each measuring point in real time according to the monitoring data results.

[0068] like Figures 4 to 7 As shown, the magnetic device 10 includes a barcode sticker 101, an LED light strip 102, a ferrite magnet 103, an external lithium battery power supply 104, a power switch 105, a power cord 106, and an aluminum alloy ruler body 107; the installation position relationship between the various structural components is: the ferrite magnet 103 is installed at the bottom of the aluminum alloy ruler body 107, and the barcode sticker 101 is installed in front of the aluminum alloy ruler body 107, ensuring that the zero point of the barcode sticker 101 is flush with the bottom of the aluminum alloy ruler body 107. The LED light strip 102 is installed on both sides in front of the aluminum alloy ruler body 107 by glue, and the external lithium battery power supply 104 and the power switch 105 are installed on the upper right side of the aluminum alloy ruler body 107 by screws. The LED light strip 102 is connected to the power switch 105 through the power cord 106 and then connected to the external lithium battery power supply 104. When working at night, turn on the power switch 105 of the LED light strip 102.

[0069] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and details may be made without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A method for intelligent measurement and control of height difference of steel components, characterized in that: The following steps are involved: S1: attaching a plurality of magnetic devices to designated measuring points of the bottom mold of the steel component in order of size, wherein the magnetic devices are provided with barcode stickers; S2: reading the barcode stickers of the magnetic devices in sequence using an electronic level to obtain the tilt readings of each magnetic device; S3: Calculating the tilt correction value according to the tilt reading of the magnetic device, including: obtaining the maximum tilt reading, the minimum tilt reading and the corresponding distance between the measuring points in the horizontal and vertical directions; calculating the horizontal axis tilt angle and the vertical axis tilt angle by using the inverse tangent function; correcting the tilt reading by using the horizontal axis tilt angle and the vertical axis tilt angle to obtain the tilt correction value; performing tilt correction on the tilt reading of each magnetic device by using the tilt correction value to obtain the vertical reading of each magnetic device; S4: Calculate the weighted average of the vertical readings of each magnetic device as the reference value: S5: Calculate the height difference adjustment value of each measuring point according to the difference between the vertical reading of each magnetic device and the reference value; S6: Based on the height difference adjustment value of each measuring point, the adjustment execution module of each measuring point below the bottom mold of the steel component is synchronously driven, so that the height difference adjustment operation of multiple measuring points is performed simultaneously until the height difference of all measuring points meets the preset accuracy requirement.

2. The intelligent measurement and control method for height difference of steel components according to claim 1 is characterized in that: In step S1, the adsorption spacing of the magnetic devices is set according to the size of the bottom mold of the steel component and the load distribution, and the distance error between adjacent magnetic devices does not exceed ±10 cm.

3. The intelligent measurement and control method for height difference of steel components according to claim 1 is characterized in that: In step S3, The transverse axial inclination angle The calculation formula is: , The longitudinal axial inclination angle The calculation formula is: , The tilt correction value The calculation formula is: , Where: Indicates the tilt reading of each magnetic device. Indicates the size, , Indicates the maximum horizontal axis tilt reading of the measuring point. Indicates the minimum horizontal axis tilt reading of the measuring point. Indicates the distance between the maximum and minimum tilt readings on the horizontal axis of the measuring point. Indicates the maximum tilt reading of the longitudinal axis of the measuring point. Indicates the minimum tilt reading of the longitudinal axis of the measuring point. Indicates the distance between the maximum tilt reading and the minimum tilt reading of the longitudinal axis of the measuring point; The vertical readings of each magnetic device The calculation formula is: 。 4. The intelligent measurement and control method for height difference of steel components according to claim 3 is characterized in that: In step S4, the reference value calculation formula is: , Where: , , is the weight of the vertical reading of each magnetic device, is the vertical reading of each magnetic device, It is the arithmetic mean of the vertical readings of each magnetic device; In step S5, the height difference adjustment value The calculation formula is: .

5. The intelligent measurement and control method for height difference of steel components according to claim 4 is characterized in that: In step S6, the height difference adjustment operation includes: Generate control instructions synchronously according to the height difference adjustment value, and drive the adjustment execution modules of each measuring point to rise or fall simultaneously according to the preset ratio; After the adjustment is completed, steps S2 to S6 are executed again, the electronic level continuously collects tilt readings and updates the height difference adjustment value, and generates secondary control instructions according to the updated height difference adjustment value until the height difference of all measuring points meets the second-class leveling accuracy requirements.

6. A steel member height difference intelligent measurement and control system for implementing the steel member height difference intelligent measurement and control method according to claim 1, characterized in that: include: Multiple magnetic devices are attached to the designated measuring points of the bottom form of the steel structure with the face facing the electronic level. The magnetic devices are arranged in scale order, and the adsorption spacing is set according to the size of the bottom form of the steel structure and the load distribution. The distance error between the scales of adjacent magnetic devices does not exceed ±10cm. An electronic level, used to read the barcode sticker on the magnetic device, and transmit the obtained tilt reading in real time through a network communication module; The cloud monitoring platform includes: a data storage unit for receiving and storing the tilt readings transmitted by the electronic level; a calculation unit for performing horizontal and vertical axis tilt corrections on the tilt readings of the magnetic devices to obtain the vertical readings of each magnetic device and obtain a reference value by calculating the weighted average of each vertical reading, and obtain an elevation adjustment value according to the difference between the vertical reading of each magnetic device and the reference value; a data transmission unit for pushing the elevation adjustment value to a client APP; Client APP, used to display real-time height difference adjustment value, height difference adjustment progress and warning information, and generate control instructions; The adjustment execution module is installed at each measuring point below the bottom form of the steel component. It is used to synchronously execute actions according to the control instructions of the client APP to achieve multi-point height difference adjustment.

7. The intelligent measurement and control system for height difference of steel components according to claim 6 is characterized in that: The magnetic attraction device comprises an aluminum alloy ruler body (107), a ferrite magnet (103) fixed to the bottom of the aluminum alloy ruler body (107), a barcode sticker (101) attached to the aluminum alloy ruler body (107), and LED light strips (102) installed on both sides of the aluminum alloy ruler body (107); the zero point of the barcode sticker (101) is flush with the bottom of the aluminum alloy ruler body (107); the LED light strip (102) is connected to an external lithium battery power supply (104) and a power switch (105) through a power cord (106); the external lithium battery power supply (104) and the power switch (105) are fixed above the aluminum alloy ruler body (107) to provide lighting during nighttime operation; the electronic level is equipped with a windproof bracket and a waterproof cover, and is suitable for operation in a wind force of level 5 or below or in rainy days.

8. The intelligent measurement and control system for height difference of steel components according to claim 6 is characterized in that: The cloud monitoring platform stores the tilt correction value and the height difference adjustment value in a database, and pushes the height difference adjustment value to the client APP in real time through a network communication module.

9. The intelligent measurement and control system for height difference of steel components according to claim 8 is characterized in that: The client APP includes: a data visualization interface, an early warning module, and a report generation module; the data visualization interface is used to display the real-time height difference adjustment value, height difference adjustment progress and height difference adjustment history of each measuring point; the early warning module is used to issue an alarm when the height difference deviation exceeds a preset threshold; the report generation module is used to automatically generate an acceptance report after the adjustment is completed.

10. The intelligent measurement and control system for height difference of steel components according to claim 6, characterized in that: The adjustment execution module includes a jack and a pad device installed at each measuring point below the bottom mold of the steel component. The adjustment step length of the jack is in linear proportion to the height difference adjustment value to achieve multi-point synchronous adjustment.

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