Q: What is serial communication?
A: Serial communication refers to the use of a single data line to transmit data bit by bit sequentially, with each bit occupying a fixed time length. It requires only a few lines to exchange information between systems, making it particularly suitable for long-distance communication between computers and between a computer and peripherals.
Q: Mobile robots easily lose mileage while traveling. How can this be addressed?
A: The loss of mileage is most likely caused by incorrect configuration of the Model file. Check whether the wheel radius and gearbox reduction ratio are configured correctly.
Q: What is a diffuse reflection photoelectric switch?
A: The diffuse reflection photoelectric switch principle is a sensor that integrates a transmitter and a receiver. When a detected object passes by, the object reflects a sufficient amount of light emitted by the photoelectric switch transmitter to the receiver, thus generating a switching signal. When the surface of the detected object is bright or its reflectivity is extremely high, the diffuse reflection photoelectric switch principle is the preferred detection mode.
Q: What is the difference between a servo motor and a regular motor?
A: A brake-type servo motor has a brake coil compared to a regular motor. If the coil is de-energized, the motor's mechanical structure will automatically hold the motor shaft, preventing it from rotating. This is known as power-off braking.
Q: What platform does the SRC series core controller use? Is it an industrial PC?
A: The core controller of the Xianzhi SRC series is based on the x86 platform with a 32-bit operating system. An industrial PC (IPC), simply put, is a computer specifically designed for industrial environments; these are two different concepts. The earliest processor was the 8086, a 16-bit processor. Later, the 80386, 80486, and even the later 80686 were all 32-bit processors. They are collectively referred to as 80x86 processors, meaning x86 represents a 32-bit processor.
Q: Can the Xianzhi robot receive radio frequency signals to achieve on-site pulling?
A: Yes, that's possible. First, the SRC series core controller uses an external I/O expansion board to convert the received RF signals into I/O signals, enabling information exchange. Technical details: The core controller communicates with the expansion board via the Modbus communication protocol; currently, only Ethernet Modbus communication is supported.
Q: What is radio frequency communication?
A: Radio frequency (RF) refers to the carrier power at that frequency that can be transmitted through an antenna (and vice versa). It propagates in free space at the speed of light as an alternating electromagnetic field. The propagation speed changes when it encounters different media, and electromagnetic wave reflection, refraction, diffraction, and penetration also occur. Commonly used RF communications include RFID, NFC, Wi-Fi, and Bluetooth.
Q: What are the characteristics of CAN communication? Does Xianzhi Robotics also use CAN communication?
A:
(1) There is no master-slave distinction in data communication. Any node can initiate data communication to any other node (one or more). The communication order is determined by the priority of each node's information. High-priority node information is communicated within 134μs.
(2) When multiple nodes initiate communication simultaneously, those with lower priority give way to those with higher priority, thus preventing congestion on the communication line;
(3) The maximum communication distance can reach 10KM (speed less than 5Kbps) and the speed can reach 1Mbps (communication distance less than 40M);
(4) The CAN bus transmission medium can be twisted pair or coaxial cable. The CAN bus is suitable for short-distance communication with large data volumes or long-distance communication with small data volumes, where real-time performance is required, and for use in multi-master/multi-slave or equal-node environments.
(5) The communication between the core controller and the driver (SDMC-310) in the Xianzhi robot is CAN communication.
