Multi-channel cascade laser displacement measurement system

Abstract

The invention relates to the technical field of laser ranging equipment, and provides a multichannel cascade laser displacement measurement system, which comprises a communication controller and a plurality of laser displacement measurement units, and is characterized in that a main controller is arranged in each laser displacement measurement unit; the plurality of main controllers are cascaded and are in communication connection with the communication controller; the communication controller is used for generating an original identity label in response to an identity request instruction sent by the main controllers and sending the original identity label to the main controllers, and the original identity label is transmitted step by step in the plurality of cascaded main controllers, so that each main controller obtains a corresponding target identity label based on the original identity label; and each main controller is used for carrying out laser displacement measurement after carrying out identity label configuration according to the corresponding target identity label, and sending measurement data to the communication controller. The system overcomes the limitation of traditional single-device measurement, enlarges the measurement coverage range, has better expansibility, improves the working efficiency, reduces the maintenance cost, and guarantees the reliability of data transmission.

Description

Technical Field

[0001] The invention relates to the technical field of laser distance measuring equipment, and in particular to a multi-channel cascade laser displacement measurement system. Background Art

[0002] With the continuous development of industrial automation and precision measurement technology, the demand for high-precision and high-stability displacement measurement is also growing. Traditional measurement equipment can hardly meet the needs of modern industry for high-speed and high-precision measurement.

[0003] Most of the laser ranging products on the market are currently designed as a single device, and the measurement method of a single device has obvious limitations, namely, each device can only be used alone and has a limited coverage range. When it is necessary to monitor a large range or multiple measurement points, the measurement range and function of a single device are limited, which makes it difficult to meet the needs of complex industrial scenarios. In addition, the use of a single device for measurement lacks scalability, and it is impossible to flexibly respond to different measurement requirements by adding equipment, and the data processing efficiency is low. Summary of the invention

[0004] In view of the shortcomings of the above-mentioned prior art, the present invention provides a multi-channel cascade laser displacement measurement system, which solves the technical problem that the testing of laser ranging products in the form of a single device in the prior art has testing limitations and cannot meet the testing requirements of complex industrial scenarios.

[0005] The present invention provides a communication controller and a plurality of laser displacement measuring units, wherein a main controller is arranged in the laser displacement measuring unit;

[0006] A plurality of the main controllers are cascaded and communicatively connected with the communication controller;

[0007] The communication controller is used to obtain the identity request instruction sent by the main controller, generate an original identity identifier in response to the identity request instruction, and send the original identity identifier to the multiple cascaded main controllers, wherein the original identity identifier is transmitted step by step in the multiple cascaded main controllers, so that each of the main controllers obtains the corresponding target identity identifier based on the original identity identifier;

[0008] Each of the main controllers is used to perform identity identification configuration according to the target identity identification corresponding to each of them, and perform laser displacement measurement after completing the identity identification configuration, and send the obtained laser displacement measurement data to the communication controller.

[0009] Optionally, a plurality of the main controllers are cascaded via a serial port;

[0010] The multiple cascaded main controllers are communicatively connected with the communication controller via a serial port.

[0011] Optionally, the multiple cascaded main controllers are respectively used to transmit the identity request instruction to the first main controller step by step, and the first main controller is used to send the identity request instruction to the communication controller, wherein the first main controller is a main controller directly connected to the communication controller.

[0012] Optionally, each of the main controllers is provided with the same preset identity identifier;

[0013] The communication controller is used to obtain the identity request instruction sent by the first main controller, generate an original identity identifier based on the identity request instruction, and send the original identity identifier to the first main controller, wherein the original identity identifier is the same as the preset identity identifier.

[0014] Optionally, the first main controller is used to receive the original identity identifier sent by the communication controller, and compare the original identity identifier with the preset identity identifier;

[0015] When the first main controller confirms that the original identity is the same as the preset identity, the first main controller generates a target identity based on the original identity, performs identity configuration based on the target identity, and transmits the target identity to the next-level main controller connected to the first main controller.

[0016] Optionally, the remaining master controllers at all levels except the first master controller are respectively used to receive the target identity identifier sent by the upper-level master controller, and compare the target identity identifier with the preset identity identifier;

[0017] When the main controllers at each level confirm that the target identity identifier sent by the main controller at the previous level is different from the preset identity identifier, the main controllers at each level respectively perform an addition operation on the target identity identifier to generate a new target identity identifier, perform identity identifier configuration based on the new target identity identifier, and pass the new target identity identifier to the connected next-level main controller.

[0018] Optionally, the system further comprises an extended laser displacement measurement unit, wherein the extended laser displacement measurement unit is provided with an extended main controller;

[0019] The extended main controller is connected to any position of the plurality of cascaded main controllers, and the extended main controller is provided with a preset identity mark;

[0020] The extended main controller is used to send an identity request instruction to the communication controller through the first main controller, and receive a target identity identifier sent by an upper-level main controller connected to the extended main controller, and compare the target identity identifier with the preset identity identifier;

[0021] When the extended main controller confirms that the received target identity is different from the preset identity, the extended main controller performs an addition operation on the target identity to generate a new target identity, performs identity configuration based on the new target identity, and transmits the new target identity to the connected next-level main controller.

[0022] Optionally, an image acquisition module is further provided in the laser displacement measurement unit, and the image acquisition module is connected to the main controller;

[0023] The image acquisition module is used to acquire a real-time image of the object to be measured, and send the real-time image to the main controller;

[0024] The main controller is used to filter the real-time image, and process the filtered real-time image based on a preset peak detection algorithm to determine the peak position, and then use an interpolation algorithm to fit the peak position to obtain a real-time pixel value, and determine the distance of the object to be measured based on the corresponding relationship between the preset pixel value and the distance.

[0025] Optionally, a synchronization calibration module is also provided in the communication controller;

[0026] The synchronous calibration module is used to receive the laser displacement measurement data sent by each of the main controllers, and perform synchronous calibration processing on a plurality of the laser displacement measurement data.

[0027] Optionally, the system further includes a host computer;

[0028] The host computer is in communication connection with the communication controller, and is used to obtain a plurality of laser displacement measurement data after synchronous calibration processing.

[0029] The multi-channel cascade laser displacement measurement system provided by the present invention significantly expands the measurement coverage of the entire system by cascading the main controllers in multiple laser displacement measurement units, overcomes the limitation that a traditional single device can only cover a limited measurement area, and is suitable for complex industrial application scenarios that require large-scale or multi-point displacement monitoring; and compared with traditional single measurement equipment, the system has better scalability, that is, when it is necessary to add new measurement points or adjust the existing measurement layout, it is only necessary to simply add new laser displacement measurement units without rebuilding the entire system, so as to adapt to industrial application scenarios of different scales and complexities; each laser displacement measurement unit is equipped with a dedicated main controller, which can perform tasks independently, not only improving the work efficiency of each unit, but also making the resource distribution in the system more reasonable; the communication controller uniformly manages the identity allocation and data collection of all laser displacement measurement units, simplifies the network architecture of the entire system, reduces maintenance costs, and also ensures the security and reliability of data transmission. In summary, the above system overcomes the limitations of traditional single-device measurement, expands the measurement coverage, has better scalability, improves work efficiency, reduces maintenance costs, and ensures the reliability of data transmission.

[0030] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0031] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0033] Figure 1 A schematic diagram of the structure of a multi-channel cascade laser displacement measurement system in an embodiment provided in the present application;

[0034] Figure 2 A flowchart of a multi-channel cascade laser displacement measurement system in an embodiment provided in the present application;

[0035] Figure 3 A schematic diagram of the connection relationship of a multi-channel cascade laser displacement measurement system in an embodiment provided in the present application;

[0036] Figure 4 A schematic diagram of the connection relationship of a multi-channel cascade laser displacement measurement system in another embodiment provided in the present application. DETAILED DESCRIPTION

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The present invention provides a multi-channel cascade laser displacement measurement system, such as Figure 1 As shown, it includes a communication controller and multiple laser displacement measuring units, and a main controller is arranged in the laser displacement measuring unit; multiple main controllers are cascaded and communicated with the communication controller; the communication controller is used to obtain the identity request instruction sent by the main controller, generate an original identity identifier in response to the identity request instruction, and send the original identity identifier to multiple cascaded main controllers, wherein the original identity identifier is transmitted step by step in the multiple cascaded main controllers so that each main controller obtains the corresponding target identity identifier based on the original identity identifier; each main controller is used to perform identity identifier configuration according to its corresponding target identity identifier, and perform laser displacement measurement after completing the identity identifier configuration, and send the obtained laser displacement measurement data to the communication controller.

[0041] The multi-channel cascade laser displacement measurement system provided by the present invention significantly expands the measurement coverage of the entire system by cascading the main controllers in multiple laser displacement measurement units, overcomes the limitation that a traditional single device can only cover a limited measurement area, and is suitable for complex industrial application scenarios that require large-scale or multi-point displacement monitoring; and compared with traditional single measurement equipment, the system has better scalability, that is, when it is necessary to add new measurement points or adjust the existing measurement layout, it is only necessary to simply add new laser displacement measurement units without rebuilding the entire system, so as to adapt to industrial application scenarios of different scales and complexities; each laser displacement measurement unit is equipped with a dedicated main controller, which can perform tasks independently, not only improving the work efficiency of each unit, but also making the resource distribution in the system more reasonable; the communication controller uniformly manages the identity allocation and data collection of all laser displacement measurement units, simplifies the network architecture of the entire system, reduces maintenance costs, and also ensures the security and reliability of data transmission. In summary, the above system overcomes the limitations of traditional single-device measurement, expands the measurement coverage, has better scalability, improves work efficiency, reduces maintenance costs, and ensures the reliability of data transmission.

[0042] Specifically, in the above embodiment, a plurality of main controllers are cascaded via a serial port; and a plurality of cascaded main controllers are communicatively connected with a communication controller via a serial port.

[0043] In this embodiment, a serial port is used for cascading between multiple main controllers and for communication connection between the main controller and the communication controller. The hardware cost is low, the communication effect is reliable, and it has strong anti-interference ability, which is suitable for complex industrial scenarios. The use of serial port cascading can also simplify wiring, reduce the number and complexity of cables, reduce installation costs and simplify the maintenance process. More main controllers can also be added to facilitate system expansion.

[0044] Specifically, in the above embodiment, multiple cascaded main controllers are respectively used to transmit the identity request instruction to the first main controller step by step, and the first main controller is used to send the identity request instruction to the communication controller, wherein the first main controller is a main controller directly connected to the communication controller.

[0045] In this embodiment, the main controller directly connected to the communication controller among the multiple cascaded main controllers is set as the first main controller. At time t0 after the system power-on initialization is completed, each main controller will continue to send an identity request instruction through the serial port. The identity request instruction is an ID request signal, and the initial value of the signal is the default ID number ID default =0xAB; Assume that in the system, the number of cascaded master controllers is N, and each master controller will transmit the identity request instruction to the first master controller step by step through the serial port. The transmission relationship can be expressed as:

[0046] ID i+1＝ ID i for i=1,2,...,N-1

[0047] Until the last main controller transmits the identity request instruction to the first main controller, and the first main controller transmits the identity request instruction to the communication controller, so that each main controller and the communication controller are connected in communication.

[0048] Furthermore, each main controller is provided with the same preset identity identifier; the communication controller is used to obtain the identity request instruction sent by the first main controller, generate an original identity identifier based on the identity request instruction, and send the original identity identifier to the first main controller, wherein the original identity identifier is the same as the preset identity identifier.

[0049] In this embodiment, after the communication controller receives the identity request instruction from the Nth main controller through the first main controller, it sends a confirmation signal "ACK" through the serial port and sends the default ID number ID default It forms a closed loop with the main controller, which can be specifically expressed as:

[0050] ACK and ID N =ID default =0xAB

[0051] The communication controller generates a new ID number IDnew as the original identity. The ID number allocation formula is:

[0052] ID new =f(ID current , i)

[0053] Among them, f(ID current , i) is an ID allocation function, ID current is the current ID number, and i is the sequence number of the main controller.

[0054] Furthermore, the first main controller is used to receive the original identity identifier sent by the communication controller and compare the original identity identifier with the preset identity identifier; when the first main controller confirms that the original identity identifier is the same as the preset identity identifier, the first main controller generates a target identity identifier based on the original identity identifier, performs identity identifier configuration based on the target identity identifier, and passes the target identity identifier to the next-level main controller connected to the first main controller.

[0055] In this embodiment, the first main controller directly connected to the communication controller first receives the reply ID confirmation signal "ACK", and configures by judging the received ID number IDreceive. The ID number IDreceive received by the first main controller, that is, the original identity identifier, can be expressed as:

[0056] ID receive =0xAB

[0057] The first main controller generates a target identity based on the original identity, that is, sets its own ID number to:

[0058] ID1=0x01

[0059] Furthermore, the main controllers at all levels except the first main controller are respectively used to receive the target identity identifier sent by the upper-level main controller, and compare the target identity identifier with the preset identity identifier; when the main controllers at all levels confirm that the target identity identifier sent by the upper-level main controller is different from the preset identity identifier, the main controllers at all levels respectively perform an add operation on the target identity identifier, generate a new target identity identifier, perform identity identifier configuration based on the new target identity identifier, and pass the new target identity identifier to the connected next-level main controller.

[0060] In this embodiment, taking the lower-level main controller connected to the first main controller as an example, when receiving the target identity ID1=0x01 sent by the first main controller, the target identity is compared with its own preset identity 0xAB, and it is confirmed that the two are different, so it can be confirmed that it is not the first main controller, and then the received target identity ID1=0x01 is added by one, so it generates its own corresponding new target identity:

[0061] ID2 = 0x02

[0062] The generated new target identity is passed to the next level main controller for configuration. The remaining levels of main controllers also configure the identity based on this principle. Each level of main controller adds one based on the received upper level target identity and then configures the identity, that is:

[0063] ID i+1 =ID i +1

[0064] like Figure 2 As shown, it is a full flow chart of identity identification judgment and configuration of main controllers at all levels in the whole system.

[0065] Furthermore, the system also includes an extended laser displacement measurement unit, in which an extended main controller is arranged; the extended main controller is connected to any position in multiple cascaded main controllers, and the extended main controller is provided with a preset identity identifier; the extended main controller is used to send an identity request instruction to the communication controller through the first main controller, and receive a target identity identifier sent by the upper-level main controller connected to the extended main controller, and compare the target identity identifier with the preset identity identifier; when the extended main controller confirms that the received target identity identifier is different from the preset identity identifier, the extended main controller performs a plus one operation on the target identity identifier, generates a new target identity identifier, performs identity identifier configuration based on the new target identity identifier, and passes the new target identity identifier to the connected next-level main controller.

[0066] In this embodiment, since the main controllers at all levels are connected in a cascade manner, the system is expandable, that is, the extended laser displacement measurement unit can be added at any time according to usage requirements. The extended main controller in the extended laser displacement measurement unit is cascaded between other main controllers. Similarly, the identity request instruction is sent to the communication main controller with reference to the main controllers at other levels, and the identity identification is configured and the subsequent transmission process is performed according to the target identity identification sent by the upper controller. The cascade access method of the extended main controller is simple and easy to implement.

[0067] Specifically, in the above embodiment, a synchronous calibration module is further provided in the communication controller; the synchronous calibration module is used to receive the laser displacement measurement data sent by each main controller, and perform synchronous calibration processing on multiple laser displacement measurement data.

[0068] In this embodiment, after all the main controllers complete the configuration of the identity identification, each main controller starts to collect laser displacement data. The data collected by each main controller is recorded as Di(t), where t is the time and i is the main controller number. It is then sent to the communication controller, and the formula for data synchronization in the synchronous calibration module of the communication control is:

[0069]

[0070] Among them, α i is the calibration coefficient, Δt i is the time delay correction term;

[0071] The communication controller calibrates and synchronizes all received displacement data to ensure data accuracy and time consistency.

[0072] Specifically, in the above embodiment, an image acquisition module is also provided in the laser displacement measurement unit, and the image acquisition module is connected to the main controller; the image acquisition module is used to acquire a real-time image of the object to be measured, and send the real-time image to the main controller; the main controller is used to filter the real-time image, and process the filtered real-time image based on a preset peak detection algorithm to determine the peak position, and then use the interpolation algorithm to fit the peak position to obtain a real-time pixel value, and determine the distance of the object to be measured based on the corresponding relationship between the preset pixel value and the distance.

[0073] In this embodiment, the principle of laser displacement measurement performed by the image acquisition module in the laser displacement measurement unit is to first obtain calibration image data, and obtain calibration data based on the calibration image data, the calibration data including the calibration position of the object to be measured and the calibration peak of the diffraction wave, and then establish a corresponding relationship between a preset pixel value and a distance based on the calibration position and the calibration peak; thereafter, the image acquisition module obtains real-time image data, obtains a real-time pixel value based on the real-time image data, and determines the real-time distance of the object to be measured based on the real-time pixel value and the corresponding relationship. This method is used to step-by-step improve the performance of the laser displacement measurement system, and is more suitable for diverse and demanding measurement tasks in modern industry.

[0074] Furthermore, the system also includes a host computer; the host computer is in communication connection with the communication controller and is used to obtain a plurality of laser displacement measurement data after synchronous calibration processing.

[0075] In this embodiment, a host computer is also set up in the system as a central node, which can centrally receive and manage data from multiple laser displacement measurement units through a communication controller, providing a unified data storage and access platform. Centralized data management helps to simplify the data analysis process and improve work efficiency; and with the help of the communication controller, it can be ensured that the data received by the host computer from multiple measurement units is synchronized, thereby improving the consistency and accuracy of the overall measurement.

[0076] Using a multi-channel cascade laser displacement measurement system provided by this application, the process of implementing the identity configuration of each level of main controller is as follows:

[0077] like Figure 3As shown, taking the cascade number of main controllers as 3 as an example, the system includes a communication controller and three main controllers. The four devices are powered on at the same time and complete the initialization settings. Among them, the preset identity identifiers of the three main controllers are 0xAB, and each main controller will send an identity request instruction through the serial port of the current device, that is, the first main controller sends it to the communication controller, the second-level main controller sends it to the first main controller, and the third-level main controller sends it to the second-level main controller; when the communication controller receives the identity request instruction, it will send a data frame with an original identity identifier of 0xAB to the first main controller through the serial port, so that the original identity identifier is transmitted between the main controllers of each level. After receiving the identity identifier, the main controllers of each level will judge it with the preset identity identifier. For example, after receiving the original identity identifier, the first main controller will judge whether the data frame is If it is not 0xAB, the current data frame is indeed equal to 0xAB, which means that the current input end is the communication controller. At this time, the target identity of the first main controller is 0x01, and the identity is configured according to the target identity 0x01, and a data frame with a target identity of 0x01 is sent to the second-level main controller. At this time, the identity configuration of the first main controller is successful. The target identity 0x01 received by the second-level main controller is different from the preset identity 0xAB. Therefore, the target identity 0x01 will be added by one to form a new target identity with a data frame of 0x02, and the identity will be configured based on the new target identity, and then the new target identity will be passed to the next-level main controller. After that, the main controllers at each level will perform identity configuration step by step based on the above method.

[0078] Using another multi-channel cascade laser displacement measurement system provided by the present application, the process of implementing the identity configuration of each level of main controller is as follows:

[0079] like Figure 4As shown, an expansion controller is added to the three-level cascade main controller. At this time, the first main controller and the second main controller complete the allocation and configuration of the identity, and the expansion controller is connected between the second main controller and the third main controller. The expansion controller will still send an identity request instruction, which is sent to the communication controller through the second main controller and the first main controller in turn. After that, the expansion controller receives the target identity of 0x02 as the data frame sent by the second main controller, and compares it with the preset identity to confirm that the target identity is different from the preset identity. Therefore, an add operation is performed on the data frame to form a new target identity with a data frame of 0x03, and the identity is configured according to the new target identity. After that, the new target identity is passed to the third main controller, and the third main controller continues to complete the judgment and configuration process of the identity. It can be seen that the multi-channel cascade laser displacement measurement system provided by the present application is also applicable to the situation where the main controller is inserted in the middle, and can better adapt to the occurrence of other situations.

[0080] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A multi-channel cascade laser displacement measurement system, characterized in that: It includes a communication controller and a plurality of laser displacement measuring units, wherein a main controller is arranged in the laser displacement measuring unit; A plurality of the main controllers are cascaded and communicatively connected with the communication controller; The communication controller is used to obtain the identity request instruction sent by the main controller, generate an original identity identifier in response to the identity request instruction, and send the original identity identifier to the multiple cascaded main controllers, wherein the original identity identifier is transmitted step by step in the multiple cascaded main controllers, so that each of the main controllers obtains the corresponding target identity identifier based on the original identity identifier; Each of the main controllers is used to perform identity identification configuration according to the target identity identification corresponding to each of them, and perform laser displacement measurement after completing the identity identification configuration, and send the obtained laser displacement measurement data to the communication controller.

2. The multi-channel cascade laser displacement measurement system according to claim 1, characterized in that: Multiple main controllers are cascaded via serial ports; The multiple cascaded main controllers are communicatively connected with the communication controller via a serial port.

3. The multi-channel cascade laser displacement measurement system according to claim 1, characterized in that: The multiple cascaded main controllers are respectively used to transmit the identity request instruction to the first main controller step by step, and the first main controller is used to send the identity request instruction to the communication controller, wherein the first main controller is a main controller directly connected to the communication controller.

4. The multi-channel cascade laser displacement measurement system according to claim 3, characterized in that: Each of the main controllers is provided with the same preset identity mark; The communication controller is used to obtain the identity request instruction sent by the first main controller, generate an original identity identifier based on the identity request instruction, and send the original identity identifier to the first main controller, wherein the original identity identifier is the same as the preset identity identifier.

5. The multi-channel cascade laser displacement measurement system according to claim 4, characterized in that: The first main controller is used to receive the original identity identifier sent by the communication controller, and compare the original identity identifier with the preset identity identifier; When the first main controller confirms that the original identity is the same as the preset identity, the first main controller generates a target identity based on the original identity, performs identity configuration based on the target identity, and transmits the target identity to the next-level main controller connected to the first main controller.

6. The multi-channel cascade laser displacement measurement system according to claim 5, characterized in that: The remaining master controllers at all levels except the first master controller are respectively used to receive the target identity identifier sent by the upper-level master controller, and compare the target identity identifier with the preset identity identifier; When the main controllers at each level confirm that the target identity identifier sent by the main controller at the previous level is different from the preset identity identifier, the main controllers at each level respectively perform an addition operation on the target identity identifier to generate a new target identity identifier, perform identity identifier configuration based on the new target identity identifier, and pass the new target identity identifier to the connected next-level main controller.

7. The multi-channel cascade laser displacement measurement system according to claim 6, characterized in that: The system further comprises an extended laser displacement measurement unit, wherein an extended main controller is arranged in the extended laser displacement measurement unit; The extended main controller is connected to any position of the plurality of cascaded main controllers, and the extended main controller is provided with a preset identity mark; The extended main controller is used to send an identity request instruction to the communication controller through the first main controller, and receive a target identity identifier sent by an upper-level main controller connected to the extended main controller, and compare the target identity identifier with the preset identity identifier; When the extended main controller confirms that the received target identity is different from the preset identity, the extended main controller performs an addition operation on the target identity to generate a new target identity, performs identity configuration based on the new target identity, and transmits the new target identity to the connected next-level main controller.

8. The multi-channel cascade laser displacement measurement system according to claim 1, characterized in that: The laser displacement measurement unit is also provided with an image acquisition module, and the image acquisition module is connected to the main controller; The image acquisition module is used to acquire a real-time image of the object to be measured, and send the real-time image to the main controller; The main controller is used to filter the real-time image, and process the filtered real-time image based on a preset peak detection algorithm to determine the peak position, and then use an interpolation algorithm to fit the peak position to obtain a real-time pixel value, and determine the distance of the object to be measured based on the corresponding relationship between the preset pixel value and the distance.

9. The multi-channel cascade laser displacement measurement system according to claim 1, characterized in that: The communication controller is also provided with a synchronization calibration module; The synchronous calibration module is used to receive the laser displacement measurement data sent by each of the main controllers, and perform synchronous calibration processing on a plurality of the laser displacement measurement data.

10. The multi-channel cascade laser displacement measurement system according to claim 9, characterized in that: The system also includes a host computer; The host computer is in communication connection with the communication controller, and is used to obtain a plurality of laser displacement measurement data after synchronous calibration processing.

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