Wireless communication safety system used in operation of monorail crane

Abstract

The invention provides a wireless communication safety system used in monorail crane operation, and relates to the technical field of monorail cranes, the wireless communication safety system comprises a hand-held wireless interphone, an intrinsic safety type base station, and a wireless signal receiving and decoding module, the hand-held wireless interphone is used for voice communication among personnel and sending an emergency stop instruction; the intrinsic safety type base station is arranged along a running track of the monorail crane, and a wireless communication link is established between the intrinsic safety type base station and the handheld wireless interphone; the wireless signal receiving and decoding module is integrated in a locomotive control system of the monorail crane; by installing and using the intrinsic safety type base station, wireless communication between a driver and a vehicle escorting worker can be achieved within the range of 100 meters in front of and behind the locomotive, and in emergency, the vehicle escorting worker can use the handheld wireless interphone to send a closed point signal to the monorail crane locomotive to cut off an operation instruction of the locomotive, meanwhile, a band-type brake is closed to achieve the parking function, and the safety of the monorail crane locomotive is improved. The transportation safety and efficiency of the monorail crane are greatly improved, and the safe and efficient production order is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of monorail cranes, and in particular to a wireless communication safety system used in the operation of a monorail crane. Background Art

[0002] Coal mines now frequently use diesel monorail cranes for transportation during excavation, coal mining, and installation and withdrawal. During transportation and lifting, personnel use whistles to communicate. The locomotive noise is often louder than the whistle, and when an emergency occurs ahead, the escort cannot notify the driver in time, causing the following hidden dangers: During the transport and lifting process, personnel use whistles to communicate, but in the event of an emergency ahead, emergency stop is impossible; Since the use of diesel monorail cranes, "whistles" have been used for communication. This method is relatively backward. The locomotive noise is often louder than the "whistle". When the locomotive is running, the "whistle" sound is small and people cannot hear it clearly. If the locomotive does not stop in time, it will cause certain safety hazards. Therefore, the present invention proposes a wireless communication safety system used in the operation of a monorail crane to solve the problems existing in the prior art. Summary of the Invention

[0003] In response to the above problems, the present invention proposes a wireless communication safety system for use in the operation of a monorail crane. The wireless communication safety system for use in the operation of the monorail crane can realize wireless communication between the driver and the escort within a range of 100 meters in front and behind the locomotive by installing and using an intrinsically safe base station. In an emergency, the escort can use a handheld wireless intercom to give the monorail crane a closing signal to disconnect the locomotive's operating instructions, and at the same time the brake is closed to implement the parking function, which greatly improves the transportation safety and efficiency of the monorail crane locomotive and ensures a safe and efficient production order.

[0004] To achieve the objectives of the present invention, the present invention is implemented through the following technical solutions: a wireless communication safety system used in the operation of a monorail crane, comprising a handheld wireless intercom, an intrinsically safe base station, and a wireless signal receiving and decoding module, wherein the handheld wireless intercom is used for voice communication between personnel and sending emergency stop commands; the intrinsically safe base station is deployed along the monorail crane locomotive operating track and establishes a wireless communication link with the handheld wireless intercom; the wireless signal receiving and decoding module is integrated into the locomotive control system of the monorail crane, receives the wireless signals forwarded by the intrinsically safe base station and decodes them into control commands; Two-way communication between the handheld wireless intercom and the locomotive control system is established through the intrinsically safe base station, a voice intercom function is realized under normal operating conditions, and in an emergency, a closed-point signal of a specific frequency is used to trigger the locomotive emergency brake.

[0005] Further improvements are: the intrinsically safe base station has a two-way radio frequency signal amplification function, the effective communication range covers an area of ​​100 meters in front and behind the locomotive, and the intrinsically safe base station supports multi-base station cascading to extend the communication distance.

[0006] A further improvement is that a heartbeat detection mechanism is established between the intrinsically safe base station and the locomotive control system. When the communication interruption exceeds 2-3 seconds, the locomotive slow-speed mode is automatically triggered and the communication interruption alarm is continuously sent.

[0007] Further improvements are: the intrinsically safe base station adopts a frequency hopping spread spectrum communication protocol, automatically selects the optimal channel in the multipath effect environment of coal mine tunnels, and has the following functions: a voice priority transmission mechanism, automatic queue-jumping transmission of emergency command signals; a data encryption module, using the AES-128 encryption algorithm with a dynamic key.

[0008] Further improvements are: the wireless signal receiving and decoding module includes a signal filtering unit, a protocol conversion unit and an emergency command recognition unit, the signal filtering unit is used to suppress electromagnetic interference in coal mines; the protocol conversion unit is used to convert wireless voice signals into locomotive bus protocol data; the emergency command recognition unit is used to immediately generate a braking control command when a closed-point signal in a preset frequency band is detected.

[0009] A further improvement is that the execution path of the braking control command is: wireless signal receiving and decoding module, locomotive master controller, command executor, hydraulic brake system, wherein the command executor is configured with a dual redundant control loop, and the parking command is still executed when a single channel fails.

[0010] A further improvement is that the wireless signal receiving and decoding module is integrated with a self-diagnostic function. When any of the following faults is detected: the signal receiving sensitivity drops by more than 3dB, the decoding error rate exceeds 0.1%, or the communication with the locomotive bus is interrupted; it automatically switches to the backup decoding channel and uploads the fault code to the ground monitoring center.

[0011] A further improvement is that the handheld wireless intercom is provided with a three-color status indicator light and a physical emergency button, wherein the three-color status indicator light indicates the normal communication mode, the emergency command has been sent, and the signal is lost; the physical emergency button is used to trigger the irreversible closed-point signal transmission.

[0012] Further improvements include: the handheld wireless walkie-talkie is equipped with a bone conduction headphone interface to achieve clear voice reception in the high-noise environment of a coal mine, and is equipped with an environmental noise sampling microphone and a vibration feedback module. The environmental noise sampling microphone is used to monitor background noise in real time and automatically adjust the transmission power; the vibration feedback module is used to generate a strong vibration warning when an emergency command is received.

[0013] A further improvement is that the intrinsically safe base station has built-in hierarchical authority management, which divides operating permissions by different frequency bands: The first frequency band (400-410MHz) is used by vehicle escorts, who have emergency braking authority; The second frequency band (410-420MHz) is for drivers to use and has driving control authority; The third frequency band (420-430MHz) is used for ground dispatch and has global monitoring authority.

[0014] The beneficial effects of the present invention are: 1. By installing and using an intrinsically safe base station, the present invention can achieve wireless communication between the driver and the escort within a range of 100 meters in front and behind the locomotive. In an emergency, the escort can use a handheld wireless intercom to give the monorail crane a closing signal to disconnect the locomotive's operating instructions. At the same time, the brake is closed to implement the parking function, which greatly improves the transportation safety and efficiency of the monorail crane locomotive and ensures a safe and efficient production order.

[0015] 2. The use of the present invention makes it convenient for the driver and the escort to communicate at any time during the monorail hoisting operation. In terms of safety, when an emergency occurs in front, the escort can stop the train in time, which adds another guarantee for the safe operation of the locomotive.

[0016] 3. The present invention uses an intrinsically safe base station in conjunction with a handheld wireless intercom, which has the characteristics of small size, easy to carry, and easy to use. It can serve the monorail crane well and can effectively reduce the number of times people get on and off the locomotive without knowing it during the actual production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the composition of the present invention. DETAILED DESCRIPTION

[0018] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the examples. The examples are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0019] Example 1 according to Figure 1 As shown, this embodiment proposes a wireless communication safety system for use in the operation of a monorail crane, including a handheld wireless intercom, an intrinsically safe base station, and a wireless signal receiving and decoding module. The handheld wireless intercom is used for voice communication between personnel and sending emergency stop commands; the intrinsically safe base station is deployed along the monorail crane locomotive operating track and establishes a wireless communication link with the handheld wireless intercom; the wireless signal receiving and decoding module is integrated into the locomotive control system of the monorail crane, receives the wireless signals forwarded by the intrinsically safe base station and decodes them into control commands; The intrinsically safe base station establishes two-way communication between the handheld wireless intercom and the locomotive control system, enabling voice intercom functionality during normal operation and triggering the locomotive's emergency brake in an emergency via a closed-loop signal at a specific frequency. By integrating voice communication and emergency braking functions into the same system, functional safety isolation is achieved through physically isolated communication frequency bands, minimizing the risk of misoperation.

[0020] The intrinsically safe base station has a two-way radio frequency signal amplification function, and its effective communication range covers an area of ​​100 meters in front and behind the locomotive. In addition, the intrinsically safe base station supports multi-base station cascading to extend the communication distance. A heartbeat detection mechanism is established between the intrinsically safe base station and the locomotive control system. When the communication interruption exceeds 2-3 seconds, the locomotive slow-speed mode is automatically triggered and a communication interruption alarm is continuously sent. The intrinsically safe base station adopts a frequency hopping spread spectrum communication protocol, automatically selects the optimal channel in the multipath effect environment of coal mine tunnels, and has the following functions: a voice priority transmission mechanism, which automatically queues up the transmission of emergency command signals; a data encryption module, which uses the AES-128 encryption algorithm with a dynamic key. The intrinsically safe base station (intrinsically safe equipment for mining) is combined with frequency hopping spread spectrum technology to solve the problem of communication interruption caused by the complex electromagnetic environment underground in coal mines.

[0021] The wireless signal receiving and decoding module includes a signal filtering unit, a protocol conversion unit, and an emergency command recognition unit. The signal filtering unit is used to suppress electromagnetic interference in coal mines; the protocol conversion unit converts wireless voice signals into locomotive bus protocol data; and the emergency command recognition unit immediately generates a brake control command upon detecting a closed-point signal within a preset frequency band. The brake control command execution path involves the wireless signal receiving and decoding module, the locomotive master controller, the command executor, and the hydraulic brake system. The command executor is equipped with a dual redundant control circuit, allowing the stop command to be executed even if a single channel fails. The wireless signal receiving and decoding module incorporates a self-diagnostic function. If any of the following faults are detected: a drop in signal reception sensitivity exceeding 3dB, a decoding error rate exceeding 0.1%, or loss of communication with the locomotive bus, it automatically switches to a backup decoding channel and uploads the fault code to the ground monitoring center. Through the deep integration of the wireless signal receiving and decoding module and the locomotive master controller, a semi-braking state is achieved, ensuring safety while facilitating rapid resumption of operation.

[0022] The handheld wireless intercom is provided with a three-color status indicator light and a physical emergency button, wherein: the three-color status indicator light indicates the normal communication mode, the emergency command has been sent, and the signal is lost; the physical emergency button is used to trigger irreversible closed-point signal transmission. The handheld wireless intercom is equipped with a bone conduction headphone interface to achieve clear voice reception in the high-noise environment of the coal mine, and is equipped with an environmental noise sampling microphone and a vibration feedback module. The environmental noise sampling microphone is used to monitor the background noise in real time and automatically adjust the transmission power; the vibration feedback module is used to generate a strong vibration warning when an emergency command is received. The combined design of the physical emergency button and the status indicator light ensures accurate operation even when working with gloves, and the vibration feedback mechanism compensates for the problem of limited hearing.

[0023] The intrinsically safe base station has built-in hierarchical authority management, which divides operating permissions by different frequency bands: The first frequency band (400-410MHz) is used by vehicle escorts, who have emergency braking authority; The second frequency band (410-420MHz) is for drivers to use and has driving control authority; The third frequency band (420-430MHz) is used for ground dispatch and has global monitoring authority.

[0024] Supports multi-base station cascading and hierarchical authority management, can adapt to the networking needs of mines of different sizes, and provide infrastructure support for the construction of smart mines Example 2 according to Figure 1 As shown, this embodiment provides a wireless communication safety system for use during monorail crane operation, including a handheld wireless intercom, an intrinsically safe base station, and a wireless signal receiving and decoding module. The intrinsically safe base station, wireless signal receiving and decoding module, in conjunction with the handheld wireless intercom, provide wireless intercom and emergency stop functions.

[0025] Principle: By using advanced wireless communication technology, with the addition of a dedicated base station for intrinsically safe coal mines and a wireless handheld device, a "closed point" signal is given to the monorail crane locomotive to disconnect the locomotive operation command in an emergency, and at the same time the brake is closed to implement the parking function, and the personnel wireless intercom function can be realized during normal operation.

[0026] Process method: Utilize the wireless signal transmission function of the handheld wireless intercom and the intrinsically safe base station; The wireless signal receiving and signal decoding module is used to transmit the wireless signal to the main controller of the monorail crane itself; The monorail crane's own master controller is used to convert wireless signals into parking instructions; The monorail crane locomotive command executor is used to run the stop command, disconnect the locomotive brake system to realize the parking function, and maintain the monorail crane locomotive's function of only stopping but not shutting down.

[0027] The wireless communication safety system used in the operation of the monorail crane can achieve wireless communication between the driver and the escort within a range of 100 meters in front and behind the locomotive by installing and using an intrinsically safe base station. In an emergency, the escort can use a handheld wireless intercom to give the monorail crane a closing signal to disconnect the locomotive's operating instructions, and at the same time, the brake is closed to implement the parking function, which greatly improves the transportation safety and efficiency of the monorail crane locomotive and ensures a safe and efficient production order. In addition, the use of the present invention makes it convenient for the driver and the escort to communicate at any time during the operation of the monorail crane. In terms of safety, when an emergency occurs in front, the escort can stop the locomotive in time, which adds another guarantee for the safe operation of the locomotive. At the same time, the present invention uses an intrinsically safe base station in combination with a handheld wireless intercom, which has the characteristics of small size, easy to carry, and easy to use. It can well serve the monorail crane and effectively reduce the number of times people get on and off the locomotive without knowing it in the actual production process.

[0028] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A wireless communication safety system used in the operation of a monorail crane, comprising a handheld wireless intercom, an intrinsically safe base station, and a wireless signal receiving and decoding module, characterized in that: The handheld wireless intercom is used for voice communication between personnel and sending emergency stop commands; the intrinsically safe base station is deployed along the monorail locomotive running track and establishes a wireless communication link with the handheld wireless intercom; the wireless signal receiving and decoding module is integrated into the locomotive control system of the monorail crane, receives the wireless signal forwarded by the intrinsically safe base station and decodes it into control commands; Two-way communication between the handheld wireless intercom and the locomotive control system is established through the intrinsically safe base station, a voice intercom function is realized under normal operating conditions, and in an emergency, a closed-point signal of a specific frequency is used to trigger the locomotive emergency brake.

2. The wireless communication safety system used in the operation of a monorail crane according to claim 1, characterized in that: The intrinsically safe base station has a two-way radio frequency signal amplification function, and its effective communication range covers an area of ​​100 meters in front and behind the locomotive. In addition, the intrinsically safe base station supports multi-base station cascading to extend the communication distance.

3. The wireless communication safety system used in the operation of a monorail crane according to claim 2, characterized in that: A heartbeat detection mechanism is established between the intrinsically safe base station and the locomotive control system. When the communication interruption exceeds 2-3 seconds, the locomotive slow-speed mode is automatically triggered and the communication interruption alarm is continuously sent.

4. The wireless communication safety system used in the operation of a monorail crane according to claim 3, characterized in that: The intrinsically safe base station adopts a frequency hopping spread spectrum communication protocol, automatically selects the optimal channel in the multipath effect environment of coal mine tunnels, and has the following functions: a voice priority transmission mechanism, automatic queue-jumping transmission of emergency command signals; a data encryption module, using the AES-128 encryption algorithm with dynamic keys.

5. The wireless communication safety system used in the operation of a monorail crane according to claim 1, characterized in that: The wireless signal receiving and decoding module includes a signal filtering unit, a protocol conversion unit and an emergency command recognition unit. The signal filtering unit is used to suppress electromagnetic interference in coal mines; the protocol conversion unit is used to convert wireless voice signals into locomotive bus protocol data; the emergency command recognition unit is used to immediately generate a braking control command when a closed-point signal in a preset frequency band is detected.

6. The wireless communication safety system used in the operation of a monorail crane according to claim 5, characterized in that: The execution path of the braking control command is: wireless signal receiving and decoding module, locomotive master controller, command executor, hydraulic brake system, wherein the command executor is configured with dual redundant control circuits, and the parking command is still executed when a single channel fails.

7. The wireless communication safety system used in the operation of a monorail crane according to claim 6, characterized in that: The wireless signal receiving and decoding module is integrated with a self-diagnostic function. When any of the following faults is detected: the signal receiving sensitivity drops by more than 3dB, the decoding error rate exceeds 0.1%, or the communication with the locomotive bus is interrupted, it automatically switches to the backup decoding channel and uploads the fault code to the ground monitoring center.

8. The wireless communication safety system used in the operation of a monorail crane according to claim 1, characterized in that: The handheld wireless intercom is provided with a three-color status indicator light and a physical emergency button, wherein: the three-color status indicator light indicates the normal communication mode, the emergency command has been sent, and the signal is lost; the physical emergency button is used to trigger the irreversible closed-point signal transmission.

9. The wireless communication safety system used in the operation of a monorail crane according to claim 8, characterized in that: The handheld wireless intercom is equipped with a bone conduction headphone interface to achieve clear voice reception in the high-noise environment of a coal mine. It is also equipped with an environmental noise sampling microphone and a vibration feedback module. The environmental noise sampling microphone is used to monitor background noise in real time and automatically adjust the transmission power; the vibration feedback module is used to generate a strong vibration warning when an emergency command is received.

10. A wireless communication safety system for use in the operation of a monorail crane according to any one of claims 1 to 9, characterized in that: The intrinsically safe base station has built-in hierarchical authority management, which divides operation permissions by different frequency bands: The first frequency band (400-410MHz) is used by vehicle escorts, who have emergency braking authority; The second frequency band (410-420MHz) is for drivers to use and has driving control authority; The third frequency band (420-430MHz) is used for ground dispatch and has global monitoring authority.

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