# US 2023/0267240 A1 · A system for managing the progress of construction based on lidar technology

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- Number: US 2023/0267240 A1
- Document ID: US20230267240A1
- Status: Published application
- Kind: A1
- Application number: 18/015,255
- Filed: 2021-10-11
- Published: 2023-08-24
- Earliest claimed: 2020-10-19
- Inventors: Wai Man Raymond LAU
- Web page: https://patentgrep.com/patent/US20230267240A1

## CPC

- G06F 30/13: Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
- G06Q 10/06: Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G01S 17/89: for mapping or imaging
- G06Q 50/08: Construction
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G06Q: INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES

## Abstract

The invention provides a system for construction progress management based on LiDAR technology, comprising a cloud server containing a BIM of a building under construction or in operation; and a handheld measurement device with a LiDAR and a positioning device. The user uses the handheld LiDAR scan at a specified location in the building and obtains point cloud data of the building structure in real time, which is transmitted via the network to the cloud server, where the cloud server obtains the comparison results and the attribute data of the building components in real time by comparing the real time measurement data with the historical measurement data and/or the building BIM, and then uses augmented/mixed reality to display on the handheld measurement device’s display screens so that users with different access rights can quickly, directly and clearly understand the progress and quality of the work, etc.

## Claims

### Claim 1

A system for managing the progress of construction based on LiDAR technology, comprising a cloud server and a handheld measurement device; the handheld measurement device is provided with a LiDAR and a positioning device; the system is used to monitor the construction progress of the building which includes the following steps:
S1. enter the building with the handheld measurement device, measure the building using the LiDAR of the handheld measurement device and record the measurement data, and the positioning device records the positioning data of the measurement location;
S2. The handheld measurement device transmits the measurement data and positioning data in real time to the cloud server, which records the measurement data, positioning data and measurement time; and according to the positioning data, it retrieves, the historical measurement data recorded at the same position is retrieved and compared with the real time measurement data to generate the comparison result data.
S3. The server transfers the comparison result data in real time to the handheld measurement devices to show the comparison result data through the display devices for augmented/mixed reality display.

### Claim 2 (depends on 1)

The system for managing the progress of construction based on LiDAR technology of claim 1, wherein the handheld measurement device is further provided with a camera device which records the image data simultaneously with the measurement of the building by LiDAR and transmits the image data to the cloud server.

### Claim 3 (depends on 2)

The system for managing the progress of construction based on LiDAR technology of claim 2, wherein in step S3, the handheld measurement device converts the comparison result data into graphic data and superimposes it on the image data of the camera device, and then sent to the display devices for augmented/mixed reality display; specific step is: the cloud server sets a specified error range, compares the measurement data with the historical measurement data recorded and calculates a deviation value; if the deviation value is within the specified error range, the measurement data is considered to be consistent with the historical measurement data; otherwise, the measurement data is inconsistent with the historical measurement data recorded, and the deviation value is formed as a quality inspection data, and the quality inspection data is highlighted in the display devices.

### Claim 4 (depends on 1)

The system for managing the progress of construction based on LiDAR technology of claim 1, wherein the cloud server provides a BIM of the building under construction, the real-time measurement data is compared with the BIM data for construction quality management, which comprises the following steps:
the handheld measurement device transmits the measurement data and positioning data to the cloud server in real time, the cloud server retrieves the BIM data in the BIM of the building according to the positioning data, compares the measurement data with the BIM data and generates the quality inspection data; the cloud server transmits the quality inspection data to the handheld measurement devices in real time, the display device of the handheld measurement device displays augmented/mixed reality display.

### Claim 5 (depends on 4)

The system for managing the progress of construction based on LiDAR technology of claim 4, wherein the cloud server sets the specified error range, compares the measurement data with the BIM data and calculates the deviation value, if the deviation value is within the error range, the measurement data is consistent with the BIM data; otherwise, the measurement data is inconsistent with the BIM data, the deviation value is formed into quality inspection data, and the quality inspection data is highlighted in the display devices.

### Claim 6 (depends on 4)

The system for managing the progress of construction based on LiDAR technology of claim 4, wherein attribute data of the building is stored in said building BIM, the cloud server transmits the attribute data of the building components in real time to handheld measurement devices, and the display device of the handheld measurement devices display the attribute data in real time.

### Claim 7 (depends on 4)

The system for managing the progress of construction based on LiDAR technology of claim 4, wherein while the measurement data is inconsistent with the BIM data, the graphic data formed by the handheld measurement devices highlight the measurement data in real time on the display devices and issues an alert.

### Claim 8 (depends on 1)

The system for managing the progress of construction based on LiDAR technology of claim 1, wherein the positioning device comprises a visible light wireless communication device distributed in the building and provided in the handheld measurement devices for communication, the visible light wireless communication device in the handheld measurement devices are connected to one of the visible light wireless communication devices in the building, and the handheld measurement devices are positioned according to the position of the visible light wireless communication devices in the building; the handheld measurement devices are positioned according to the location of the building’s visible light wireless communication devices, and the handheld measurement devices are connected to the cloud server through the visible light wireless communication devices.

### Claim 9 (depends on 1)

The system for managing the progress of construction based on LiDAR technology of claim 1, wherein the positioning devices are iBeacon positioning devices or QR Codes, Barcodes, RFIDs, and indoor mobile network positioning devices in the building site.

### Claim 10 (depends on 1)

The system for managing the progress of construction based on LiDAR technology of claim 1, wherein the cloud server uses blockchain-based data storage, which is including a measurement records and timings database, a building component properties database, a BIM database of the building, and a user rights and information database.