Multi-master-to-multi-slave device wireless interaction method for engineering machinery

Abstract

The invention discloses an engineering machinery multi-master-to-multi-slave equipment wireless interaction method, and belongs to the technical field of engineering machinery. A wireless communication mode is adopted, the problems that in hard wire communication, most of the interiors of cables are high-voltage wires with large wire diameters, and wear-resistant protection is added outside are solved, a large amount of real-time data can be transmitted, and the data transmission capacity is improved; the ultrahigh frequency (UHF) frequency band of 430-450MHz is adopted for wireless communication, the frequency band has good propagation characteristics and penetrating power, stable communication can be achieved in a long distance, meanwhile, the penetrating power to obstacles such as buildings is high, and the system is suitable for complex environments such as mines. A handshake response mechanism is arranged between the master station and the slave station, so that correct pairing between the master station and the slave station is ensured, communication identification errors are prevented, and the problem that an excavator end or a mobile power supply end breaks down is avoided; the slave station needs to judge the connection state of the cable, wireless interaction can be carried out only when the cable is successfully connected, and communication abnormity caused by the fact that the cable is not connected is avoided.

Description

Technical Field

[0001] This invention belongs to the field of engineering machinery technology, specifically a wireless interaction method for multiple master-to-multiple slave devices in engineering machinery. Background Technology

[0002] The mining industry is accelerating its transformation towards green, intelligent, cost-reducing, and efficiency-enhancing technologies. New energy mining DC-electric excavators, due to their unique working environment, are characterized by high power consumption, long-term continuous fixed-point operation, short travel distances, and slow track speeds. They cannot be charged directly, and the power batteries installed on the excavators cannot meet the demands of extended operation, requiring external mobile power supply vehicles. However, this necessitates extensive data communication between the excavator and the mobile power supply vehicle, involving relatively large data volumes and requiring high latency.

[0003] The following problems typically exist in existing technologies: 1. Hard-wired communication requires data transmission via cables. These cables typically contain high-voltage wires with thicker diameters and are externally protected against wear. However, the internal low-voltage hard-wired communication cannot transmit large amounts of data, resulting in limited data transmission capacity. 2. When using CAN communication for data transmission, the communication distance is too long, which does not meet the ISO 11898 CAN high-speed communication standard, and the communication distance and speed are limited; 3. When using optical fiber for data transmission, the cable is easily damaged by stretching, causing communication abnormalities, high failure rate, and poor communication stability and reliability; 4. Using 4G and 5G communication, there are some working conditions where there is no signal, communication is unstable, and data exchange is impossible. If the stability conditions are met, corresponding base stations need to be added, which involves large investment costs and long construction periods. 5. In mining operations, there are situations where different excavators are paired with different mobile power supply vehicles. Existing technologies cannot effectively prevent communication pairing anomalies or errors, which can lead to malfunctions on the excavator or mobile power supply side. 6. Existing technologies cannot maintain stable communication links in complex environments, and devices are prone to communication abnormalities when the signal is weak or there is significant interference.

[0004] Furthermore, in mining operations, different excavators may be paired with different mobile power supply vehicles. If communication pairing fails or is incorrect, it can lead to malfunctions on either the excavator or the mobile power supply side. Therefore, a new wireless communication interaction scheme is urgently needed to ensure interaction stability, prevent communication identification errors, and avoid equipment failure. Summary of the Invention

[0005] To achieve the above objectives, the technical solution provided by the present invention is as follows: The present invention provides a method for wireless interaction between multiple master-to-multiple slave devices in engineering machinery, which establishes communication between the master station VCU and the slave station VCU through a master station wireless module and a slave station wireless module; Specifically, it includes the following steps. S100, the master station VCU sends a handshake response request HandshakeRespReq; S200: After receiving the handshake response request HandshakeRespReq, the master station wireless module sends the handshake response request HandshakeRespReq to the slave station wireless module to identify the slave station wireless device that can respond to the handshake. S300: After receiving the handshake response request HandshakeRespReq, the slave wireless device sends a master handshake response request MasterStatHandshakeRespReq to the slave controller. S400: After the slave controller receives the master handshake response request MasterStatHandshakeRespReq, it determines whether handshake pairing can be performed. If it can, it executes step S500; if it cannot, it restarts step S100. S500: The slave controller sends an identified pairing command (hard-wired signal) to the master controller VCU, and at the same time sends an AllHandshakePair command to the slave wireless device to enable handshake pairing. After receiving the AllHandshakePair command, the slave wireless device sends the AllHandshakePair signal and device number to the master wireless module. After receiving the hardwire pairing request signal, the S700 master station performs a redundancy check. If the check passes, it sends a handshake success command (HandshakeSuc) to the master station wireless module. After receiving the handshake success command HandshakeSuc, the S800 master station wireless module sends the handshake success command HandshakeSuc to the designated slave station device. The S900, master station, and slave station perform bidirectional data pass-through.

[0006] Preferably, step S100 includes S110. The master station VCU initiates a handshake response request HandshakeRespReq as needed; S120, the master station VCU sends the handshake response request HandshakeRespReq to the master station wireless module; S130. After the main station wireless module receives the handshake response request HandshakeRespReq, it proceeds to step S200.

[0007] Preferably, step S400 includes S410. Determine if the connector connection confirmation signal is valid; S420. Determine whether the pairing is complete. S430. If the connector connection confirmation signal is valid and not in the paired state, handshake pairing can be performed; otherwise, handshake pairing cannot be performed.

[0008] Compared with the prior art, the technical solution provided by this invention has the following advantages: This invention discloses a wireless interaction method for multiple master-to-multiple slave devices in engineering machinery. Employing wireless communication, it avoids the problems associated with hard-wired communication, such as the use of thick-diameter high-voltage cables and the need for external wear-resistant protection. This method enables the transmission of large amounts of real-time data, improving data transmission capabilities. It utilizes the 430-450MHz ultra-high frequency (UHF) band for wireless communication, which possesses good propagation characteristics and penetration capabilities, enabling stable communication over long distances. It also exhibits strong penetration through obstacles such as buildings, making it suitable for complex environments like mines. A handshake and response mechanism between the master and slave stations ensures correct pairing, preventing communication identification errors and avoiding malfunctions at the excavator or power bank end. The slave station must determine the cable connection status; wireless interaction only occurs when the cable is successfully connected, preventing communication anomalies caused by disconnected cables. Adaptive interference avoidance technology and a high receiver sensitivity design maintain a stable communication link even under weak signal or high interference conditions, improving communication reliability and stability. Attached Figure Description

[0009] Figure 1 This is a flowchart of a wireless interaction method for multiple master-to-multiple slave devices in engineering machinery according to the present invention. Detailed Implementation

[0010] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0011] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0012] See attached document Figure 1This embodiment provides a method for wireless interaction between multiple master-to-multiple slave devices in engineering machinery, which establishes communication between the master station VCU and the slave station VCU through the master station wireless module and the slave station wireless module. Specifically, it includes the following steps. S100, the master station VCU sends a handshake response request HandshakeRespReq; S200: After receiving the handshake response request HandshakeRespReq, the master station wireless module sends the handshake response request HandshakeRespReq to the slave station wireless module to identify the slave station wireless device that can respond to the handshake. S300: After receiving the handshake response request HandshakeRespReq, the slave wireless device sends a master handshake response request MasterStatHandshakeRespReq to the slave controller. S400: After the slave controller receives the master handshake response request MasterStatHandshakeRespReq, it determines whether handshake pairing can be performed. If it can, it executes step S500; if it cannot, it restarts step S100. S500: The slave controller sends an identified pairing command (hard-wired signal) to the master controller VCU, and at the same time sends an AllHandshakePair command to the slave wireless device to enable handshake pairing. After receiving the AllHandshakePair command, the slave wireless device sends the AllHandshakePair signal and device number to the master wireless module. After receiving the hardwire pairing request signal, the S700 master station performs a redundancy check. If the check passes, it sends a handshake success command (HandshakeSuc) to the master station wireless module. After receiving the handshake success command HandshakeSuc, the S800 master station wireless module sends the handshake success command HandshakeSuc to the designated slave station device. The S900, master station, and slave station perform bidirectional data pass-through.

[0013] The step S100 includes S110. The master station VCU initiates a handshake response request HandshakeRespReq as needed; S120, the master station VCU sends the handshake response request HandshakeRespReq to the master station wireless module; S130. After the main station wireless module receives the handshake response request HandshakeRespReq, it proceeds to step S200.

[0014] The step S400 includes S410. Determine if the connector connection confirmation signal is valid; S420. Determine whether the pairing is complete. S430. If the connector connection confirmation signal is valid and not in the paired state, handshake pairing can be performed; otherwise, handshake pairing cannot be performed.

[0015] The communication between the master station wireless module and the slave station wireless module uses the 430~450MHz ultra-high frequency (UHF) band. This band has good propagation characteristics and penetration ability, and can achieve stable communication within a distance of 300 meters. It also has strong penetration ability through obstacles such as buildings, making it suitable for complex environments such as mines. The wireless transmission and reception sensitivity is -120dBm; the default frequency is 64 points; and an adaptive interference avoidance technology is adopted to maintain a stable communication link even when the signal is weak or the interference is large.

[0016] This embodiment employs wireless communication, avoiding the problems associated with hard-wired communication, such as the use of thick-diameter high-voltage wires inside the cable and the need for external abrasion protection. This allows for the transmission of large amounts of real-time data, improving data transmission capabilities. It utilizes the 430-450MHz ultra-high frequency (UHF) band for wireless communication, which has good propagation characteristics and penetration capabilities, enabling stable communication over long distances. It also has strong penetration through obstacles such as buildings, making it suitable for complex environments like mines. A handshake and response mechanism between the master and slave stations ensures correct pairing, preventing communication identification errors and avoiding problems caused by malfunctions at the excavator or power bank end. The slave station needs to determine the cable connection status; wireless interaction only occurs when the cable is successfully connected, preventing communication anomalies caused by cable disconnection. Adaptive interference avoidance technology and a high receiver sensitivity design maintain a stable communication link even under weak signal or high interference conditions, improving communication reliability and stability.

[0017] The above-described embodiments are merely illustrative of certain implementations of the present invention, and are described in a relatively specific and detailed manner. However, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A method for wireless interaction between multiple master-to-multiple slave devices in engineering machinery, characterized in that: Communication between the master station VCU and the slave station VCU is established through the master station wireless module and the slave station wireless module; Specifically, it includes the following steps. S100, the master station VCU sends a handshake response request HandshakeRespReq; S200: After receiving the handshake response request HandshakeRespReq, the master station wireless module sends the handshake response request HandshakeRespReq to the slave station wireless module to identify the slave station wireless device that can respond to the handshake. S300: After receiving the handshake response request HandshakeRespReq, the slave wireless device sends a master handshake response request MasterStatHandshakeRespReq to the slave controller. S400: After the slave controller receives the master handshake response request MasterStatHandshakeRespReq, it determines whether handshake pairing can be performed. If it can, it executes step S500; if it cannot, it restarts step S100. S500: The slave controller sends an identified pairing command (hard-wired signal) to the master controller VCU, and at the same time sends an AllHandshakePair command to the slave wireless device to enable handshake pairing. After receiving the AllHandshakePair command, the slave wireless device sends the AllHandshakePair signal and device number to the master wireless module. After receiving the hardwire pairing request signal, the S700 master station performs a redundancy check. If the check passes, it sends a handshake success command (HandshakeSuc) to the master station wireless module. After receiving the handshake success command HandshakeSuc, the S800 master station wireless module sends the handshake success command HandshakeSuc to the designated slave station device. The S900, master station, and slave station perform bidirectional data pass-through.

2. The wireless interaction method for multiple master-to-multiple slave devices in engineering machinery according to claim 1, characterized in that: The step S100 includes S110. The master station VCU initiates a handshake response request HandshakeRespReq as needed; S120, the master station VCU sends the handshake response request HandshakeRespReq to the master station wireless module; S130. After the main station wireless module receives the handshake response request HandshakeRespReq, it proceeds to step S200.

3. The wireless interaction method for multiple master-to-multiple slave devices in engineering machinery according to claim 1, characterized in that: The step S400 includes S410. Determine if the connector connection confirmation signal is valid; S420. Determine whether the pairing is complete. S430. If the connector connection confirmation signal is valid and not in the paired state, handshake pairing can be performed; otherwise, handshake pairing cannot be performed.

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