A laser ranging sensor communication circuit

Abstract

The utility model relates to communication circuit technical field, especially a kind of laser ranging sensor communication circuit, including power module, for the whole communication circuit power supply, still including main control unit, buffer circuit, special control unit, ranging circuit;It is equipped with multiple communication pins, for generating corresponding control instruction according to the distance measured by laser ranging sensor;With communication pin is connected, and is equipped with level conversion and bus isolation function;It is equipped with special data processing module, for sending the data specially handled to main control unit by buffer circuit;With special control unit and power module are connected, laser ranging sensor is connected in ranging circuit.The utility model aims at improving resource utilization, solve bus conflict and the shortage of driving force.

Description

Technical Field

[0001] This utility model relates to the field of communication circuit technology, and in particular to a communication circuit for a laser ranging sensor. Background Technology

[0002] Laser ranging sensors play a crucial role in humanoid robot navigation, obstacle avoidance, and environmental perception. Traditional solutions employ a single main controller (MCU) to directly manage the sensors. To avoid circuitry overhead, the main controller itself needs to coordinate the control of multiple different sensors and drive mechanisms. However, high-speed real-time ranging requires frequent interrupt processing, resulting in significant resource consumption of the main controller. In multi-sensor collaborative scenarios, this can easily lead to system latency and restrict the robot's dynamic response capabilities.

[0003] In order to achieve accurate laser ranging in existing communication circuits and enable the main controller to analyze and process the measured data in a timely manner, the laser ranging device needs to be equipped with additional power consumption and data storage units, and the entire circuit wiring needs to be adjusted. This will increase the wiring complexity and reduce system efficiency. Utility Model Content

[0004] The main purpose of this invention is to provide a communication circuit for a laser ranging sensor, which aims to improve resource utilization and solve bus conflicts and insufficient driving force.

[0005] To achieve the above objectives, this utility model proposes a laser ranging sensor communication circuit, including a power supply module for supplying power to the entire communication circuit, and also including a main control unit, a buffer circuit, a dedicated control unit, and a ranging circuit.

[0006] It is equipped with multiple communication pins, which are used to generate corresponding control commands based on the distance measured by the laser rangefinder.

[0007] It connects to the communication pin and is equipped with level shifting and bus isolation functions;

[0008] It is equipped with a dedicated data processing module, which is used to send specially processed data to the main control unit through a buffer circuit;

[0009] It is connected to a dedicated control unit and power module, and the laser rangefinder is connected to the ranging circuit.

[0010] In one embodiment of this application, the buffer circuit includes a buffer chip and an isolation unit;

[0011] Pin 1 of the buffer chip is electrically connected to pin 15 of the main control unit, pin 7 is connected to pin 16 of the main control unit, pin 5 is connected to pin 21 of the main control unit, pin 6 is connected to pin 20 of the main control unit, and pins 2, 3 and 8 are connected to the power module, and pin 4 is grounded.

[0012] The isolation unit is located between the power module and the buffer chip.

[0013] In one embodiment of this application, pin 7 of the dedicated control unit is configured as a voltage input interface connected to the power module and grounded, pin 8 is grounded, pin 11 is connected to pin 3 of the buffer chip for communication and data transmission, and pins 13 and 14 are configured as data input terminals.

[0014] In one embodiment of this application, the ranging circuit is configured with a first connection circuit connected to the power module. A first resistor and a second resistor are connected in series on each of the 5, 7, 9 and 10 pins of the ranging circuit and are connected in parallel to each other in the first connection circuit. Pins 2, 3, 4, 6 and 12 are all grounded.

[0015] Pin 13 of the dedicated control unit is connected between the first and second resistors of pin 9 of the ranging circuit, and pin 14 of the dedicated control unit is connected between the first and second resistors of pin 10 of the ranging circuit.

[0016] In one embodiment of this application, the ranging circuit is further configured with a second connection circuit for connecting to the power module, wherein pin 1 and pin 11 of the ranging circuit are connected in parallel to each other and connected to the second connection circuit;

[0017] At least two grounding protection units are connected in parallel on the second connection circuit.

[0018] In one embodiment of this application, the main control unit is model AC7916AB.

[0019] By adopting the above technical solution, this utility model has the following advantages:

[0020] The communication circuit of this application mainly includes a main control unit that can be configured with multiple peripheral interfaces, a buffer circuit connected to the main control unit for stabilizing voltage and isolating the bus to ensure the stable operation of the main control unit, a ranging circuit for setting the laser ranging sensor, and a dedicated control unit connected at one end to the ranging circuit and at the other end to the buffer circuit. By designing the buffer circuit to isolate the main control unit, the main control unit can process data transmitted from other sensors normally while receiving control commands transmitted from the dedicated control unit and relaying the control instructions. This structure completely separates the main control unit and the dedicated control unit, avoiding errors caused by the main control unit receiving too much information. The entire communication circuit structure is simple. The dedicated control unit only processes the data transmitted by the ranging circuit, which can ensure the efficiency and stability of data processing and the accuracy of the data transmitted by the main control unit, effectively improving the user experience.

[0021] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the main control unit of the communication circuit of the laser ranging sensor of this utility model;

[0024] Figure 2 This is a schematic diagram of the buffer circuit of the communication circuit of the laser ranging sensor of this utility model;

[0025] Figure 3 This is a schematic diagram of the dedicated control unit for the communication circuit of the laser ranging sensor of this utility model;

[0026] Figure 4 This is a schematic diagram of the ranging circuit of the laser ranging sensor communication circuit of this utility model.

[0027] Explanation of icon numbers:

[0028] 1. Main control unit; 2. Buffer circuit; 21. Buffer chip; 22. Isolation unit; 3. Dedicated control unit; 4. Distance measuring circuit; 41. First connection circuit; 42. Second connection circuit; 43. First resistor; 44. Second resistor.

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0031] Reference Figures 1 to 4 To achieve the above objectives, this utility model proposes a laser ranging sensor communication circuit, including a power supply module for powering the entire communication circuit, and also including a main control unit 1, a buffer circuit 2, a dedicated control unit 3, and a ranging circuit 4; it has multiple communication pins for generating corresponding control commands based on the distance measured by the laser ranging sensor; it is connected to the communication pins and is equipped with level conversion and bus isolation functions; it is equipped with a dedicated data processing module for sending specially processed data to the main control unit 1 through the buffer circuit 2; it is connected to the dedicated control unit 3 and the power supply module, and the laser ranging sensor is connected to the ranging circuit 4.

[0032] The communication circuit of this application mainly includes a main control unit 1, which can be configured with multiple peripheral interfaces; a buffer circuit 2 connected to the main control unit 1 and used to stabilize voltage and isolate the bus to ensure the stable operation of the main control unit 1; a ranging circuit 4 for setting the laser ranging sensor; and a dedicated control unit 3 connected at one end to the ranging circuit 4 and at the other end to the buffer circuit 2. By designing the buffer circuit 2 to isolate the main control unit 1, the main control unit 1 can process data transmitted from other sensors normally while receiving control commands transmitted from the dedicated control unit 3 and relaying the control instructions. This structure can completely separate the main control unit 1 and the dedicated control unit 3, avoiding errors caused by the main control unit 1 receiving too much information. The entire communication circuit structure is simple. The dedicated control unit 3 only processes the data transmitted by the ranging circuit 4, which can ensure the efficiency and stability of data processing and the accuracy of the data transmitted by the main control unit 1, effectively improving the user experience.

[0033] See also Figure 2 The buffer circuit 2 includes a buffer chip 21 and an isolation unit 22;

[0034] Pin 1 of buffer chip 21 is electrically connected to pin 15 of main control unit 1, pin 7 is connected to pin 16 of main control unit 1, pin 5 is connected to pin 21 of main control unit 21, pin 6 is connected to pin 20 of main control unit 21, and pins 2, 3 and 8 are connected to the power module, and pin 4 is grounded.

[0035] The isolation unit 22 is located between the power module and the buffer chip 21.

[0036] The core buffer chip 21 of the buffer circuit 2 in this application is SN74LVC2G125. As a dual-channel (containing two independent buffers) tri-state output bus buffer chip, it has 8 pins. Pins 2, 3, 6, and 8 are all connected together and connected to the power module, enabling the entire chip to work normally and stably. At the same time, an isolation unit 22 is provided between the above four pins and the power module to protect the entire chip. The isolation unit 22 includes multiple capacitors and resistors, where the resistors are connected in series with the pins and the capacitors are connected in parallel with the pins, ensuring the stable operation of the entire chip.

[0037] The special 6-pin is directly connected to the main control unit 1. Of the other four pins 1, 4, 5, and 7, only pin 4 is grounded to protect the chip. The other three pins are directly connected to the main control unit 1 to ensure stable data communication.

[0038] See also Figure 3 The 7th pin of the dedicated control unit 3 is configured as a voltage input interface connected to the power module and grounded, the 8th pin is grounded, the 11th pin is connected to the 3rd pin of the buffer chip 21 for communication and data transmission, and the 13th and 14th pins are configured as data input terminals.

[0039] To enable the dedicated control unit 3 to quickly process and stably output ranging data, the core of the dedicated control unit 3 is the AD152A4 chip. This chip has multiple pins and can accommodate more peripherals. In this application, its fast data processing function is mainly utilized. Pin 7 of this chip is connected to a +3.3V power supply and is equipped with power-inrush protection. Pin 8 is grounded to protect the entire chip, and pin 11 is directly connected to the buffer chip 21 to ensure stable communication.

[0040] See also Figure 4 The ranging circuit 4 is equipped with a first connection circuit 41 connected to the power module. A first resistor 43 and a second resistor 44 are connected in series on pins 5, 7, 9 and 10 of the ranging circuit 4, and are connected in parallel to each other in the first connection circuit 41. Pins 2, 3, 4, 6 and 12 are all grounded.

[0041] Pin 13 of the dedicated control unit 3 is connected between the first resistor 43 and the second resistor 44 of pin 9 of the ranging circuit 4, and pin 14 of the dedicated control unit 3 is connected between the first resistor 43 and the second resistor 44 of pin 10 of the ranging circuit 4.

[0042] The laser ranging circuit 4 uses the VL53L0X chip, a 12-pin chip. Except for pin 8 which is unused, pins 5, 7, 9, and 10 are respectively equipped with a first resistor 43 and a second resistor 44. All four pins are connected to the first connection circuit 41, which is connected to an external 3.3V power supply. Pins 13 and 14 of the dedicated control unit 3 are respectively connected to pins 9 and 10, and are connected between the first resistor 43 and the second resistor 44 in the corresponding branch of pins 9 and 10. By filtering out interference data through resistors and transmitting it stably to the dedicated control unit 3, the accuracy of the data test can be guaranteed.

[0043] See also Figure 4 The ranging circuit 4 is also equipped with a second connection circuit 42 for connecting to the power module. Pin 1 and pin 11 of the ranging circuit 4 are connected in parallel to each other and connected to the second connection circuit 42.

[0044] At least two grounding protection units are connected in parallel on the second connection circuit 42.

[0045] In order for the ranging circuit 4 to work properly, the ranging circuit 4 is also configured with a second connection circuit 42 connected to a 2.8V power supply through pins 1 and 11. The second connection circuit 42 enables the laser ranging chip to work properly, and two capacitors with different capacitance values ​​are set on the second connection cable to ensure the lifespan of the chip.

[0046] See also Figure 1 The main control unit 1 is model AC7916AB.

[0047] The AC7916AB is the "brain" of the robot, responsible for initiating ranging requests, reading ranging data, processing information, and controlling robot movements. It communicates with the laser ranging sensor through a specific interface. Robots equipped with the main control unit 1 can be more flexible, and connecting other sensors using this chip allows the robot to work in coordination with multiple sensors.

[0048] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0049] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A laser ranging sensor communication circuit, comprising a power supply module for supplying power to the entire communication circuit, characterized in that, Also includes: The main control unit is equipped with multiple communication pins, which are used to generate corresponding control commands based on the distance measured by the laser rangefinder. A buffer circuit is connected to the communication pin and is equipped with level shifting and bus isolation functions; A dedicated control unit is equipped with a dedicated data processing module, which is used to send specially processed data to the main control unit through a buffer circuit; The ranging circuit is connected to the dedicated control unit and power module, and the laser ranging sensor is connected to the ranging circuit.

2. The laser ranging sensor communication circuit according to claim 1, characterized in that, The buffer circuit includes: The buffer chip has pin 1 electrically connected to pin 15 of the main control unit, pin 7 connected to pin 16 of the main control unit, pin 5 connected to pin 21 of the main control unit, pin 6 connected to pin 20 of the main control unit, and pins 2, 3 and 8 connected to the power module, and pin 4 grounded. An isolation unit is located between the power module and the buffer chip.

3. The laser ranging sensor communication circuit according to claim 2, characterized in that, Pin 7 of the dedicated control unit is configured as a voltage input interface connected to the power module and grounded, pin 8 is grounded, pin 11 is connected to pin 3 of the buffer chip for communication and data transmission, and pins 13 and 14 are configured as data input terminals.

4. The laser ranging sensor communication circuit according to claim 3, characterized in that, The ranging circuit is configured with a first connection circuit connected to the power module. A first resistor and a second resistor are connected in series on pins 5, 7, 9, and 10 of the ranging circuit, and are connected in parallel to each other in the first connection circuit. Pins 2, 3, 4, 6, and 12 are all grounded. Pin 13 of the dedicated control unit is connected between the first and second resistors of pin 9 of the ranging circuit, and pin 14 of the dedicated control unit is connected between the first and second resistors of pin 10 of the ranging circuit.

5. The laser ranging sensor communication circuit according to claim 4, characterized in that, The ranging circuit is also configured with a second connection circuit for connecting to the power module. Pins 1 and 11 of the ranging circuit are connected in parallel to each other and connected to the second connection circuit. At least two grounding protection units are connected in parallel on the second connection circuit.

6. The laser ranging sensor communication circuit according to claim 1, characterized in that, The main control unit is model AC7916AB.

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