Remote control system for a fire fighting crane
By integrating components such as controllers, wireless remote control systems, and high-voltage alarm devices into fire-fighting cranes, safe remote control of fire-fighting cranes has been achieved, solving the problem of crane booms accidentally touching power lines and improving the intelligence of the equipment and the safety of the fire-fighting process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XUZHOU HEAVY MASCH CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-05-29
AI Technical Summary
The existing remote control system of fire-fighting cranes lacks a complete control logic, which makes it easy for operators to accidentally touch the power line with the crane arm due to negligence in high-rise building fires, resulting in damage to equipment and personnel. The level of intelligence is low.
It employs components such as a controller, wireless remote control transmitter, wireless remote control receiver, encoder, high voltage receiver, high voltage transmitter, battery pack, level, motor commutation device, audible and visual alarm device, and camera. It achieves remote control and real-time monitoring of the equipment through CAN communication, and is equipped with high voltage alarm and fault early warning functions to ensure operational safety.
It enables safe remote control of fire cranes, avoids accidental contact between the crane boom and power lines, improves the safety of the fire extinguishing process and the intelligence of the equipment, ensures that operators can control the water cannon rotation and monitor the environment within a safe range, and provides auxiliary functions such as power battery voltage detection, power detection and fault warning.
Smart Images
Figure CN224304047U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a remote control system, and more particularly to a remote control system for a fire crane. Background Technology
[0002] High-rise fires are characterized by rapid fire spread, difficult evacuation, and high firefighting challenges. Fire cranes, with their high mobility, adjustable boom height, and comprehensive rescue equipment, have become specialized equipment for high-rise building fire rescue. However, during high-rise building firefighting, the safe operation of firefighting equipment largely depends on the operator's skill level; the equipment's intelligence level is low, and its safety control system is inadequate.
[0003] Chinese patent CN220564177U, a truck-mounted crane with a lifting auxiliary water conveyance function, provides a truck-mounted crane with a lifting auxiliary water conveyance function, adds a camera to the top of the lifting arm, sets the nozzle of the water pipe to be steerable, and provides a detailed description of the overall vehicle structure, but the specific electronic control aspects are less involved.
[0004] The existing remote control systems of fire cranes lack complete control logic. Although some equipment is equipped with monitoring devices and rotating nozzles, which improves the safety of the equipment, the overall level of automation is low and there is a lack of effective means of monitoring surrounding power lines.
[0005] Currently, when fire-fighting cranes are used for fire suppression, operators need to observe the surrounding situation in real time during the operation of the crane's boom extension. However, the wiring around high-rise buildings is complex, and slight negligence by the operator can easily cause the crane boom to accidentally touch the power lines, resulting in damage to personnel and equipment. Utility Model Content
[0006] Purpose of the utility model: The purpose of this utility model is to provide a remote control system for a fire-fighting crane to ensure the safety of the equipment during the fire-fighting process.
[0007] Technical Solution: This utility model includes a controller, a wireless remote control transmitter, a wireless remote control receiver, an encoder, a high-voltage receiver, a high-voltage transmitter, a battery assembly, a level, a motor commutation device, an audible and visual alarm device, and a camera. The controller interacts with the battery assembly, motor commutation device, audible and visual alarm device, encoder, level, high-voltage receiver, and wireless remote control receiver via CAN communication. One end of the wireless remote control transmitter is connected to the wireless remote control receiver, and the other end is connected to the camera. One end of the motor commutation device is connected to the battery assembly, and the other end is connected to a single-phase asynchronous motor. The high-voltage receiver is connected to the high-voltage transmitter.
[0008] The controller is responsible for receiving signals from various components, performing logical analysis, enabling motor forward and reverse rotation, high-voltage alarms, and other fault warnings, and transmitting the relevant information back to the display on the remote control handle to drive the corresponding indicator lights to illuminate, thus facilitating human-machine interaction.
[0009] The high-voltage transmitter is installed at both ends of the boom of the fire-fighting crane, and the high-voltage receiver is installed in the crane's control room. When the electric field strength received by the high-voltage transmitter is too high, the alarm indicator light on the high-voltage receiver will be triggered.
[0010] The encoder is installed on the rotating arm head and is used to detect the angular position of the fire monitor and display the angle information on the remote control's display screen, so that the operator can adjust the position of the fire monitor more accurately.
[0011] The fire monitor is fixed on the rotating device at the top of the crane boom. As the boom extends and retracts, it reaches a specific height. The rotation of the monitor with the rotating device is mainly achieved by manipulating the remote control handle of the wireless remote control receiver.
[0012] The single-phase asynchronous motor is used to drive the equipment to rotate, and the motor can be reversed through a motor commutation device, thereby driving the equipment to rotate clockwise and counterclockwise.
[0013] The motor commutation device includes multiple sets of solid-state relays and multiple sets of AC contactors. In order to realize the rotation of the fire monitor, the power battery outputs AC power to the motor commutation device through the inverter. The motor commutation device is then connected to the controller and the single-phase asynchronous motor.
[0014] The audible and visual alarm device includes a rotating alarm light and a reversing alarm.
[0015] Beneficial effects: This utility model has the following advantages:
[0016] 1. Power the motor that drives the fire monitor to rotate through an independent power system and configure remote control function to ensure that the operator can control the water monitor to rotate to the appropriate position within a safe range;
[0017] 2. The system is equipped with auxiliary functions such as visual monitoring and high-voltage alarm. Visual monitoring ensures real-time monitoring of the environment around the crane boom, ensuring the safety of the boom extension and fire extinguishing processes. The high-voltage alarm can detect the power lines around the equipment and issue an audible and visual alarm when the distance is too close, reminding the operator to keep the equipment away from the high-voltage lines, greatly ensuring the safety of the fire extinguishing process. The remote control system also has auxiliary functions such as power battery voltage detection, power detection, rotation angle detection, status detection, and fault warning. Attached Figure Description
[0018] Figure 1 This is a system block diagram of the present invention;
[0019] Figure 2 This is the control logic diagram of the motor commutation device of this utility model. Detailed Implementation
[0020] The present invention will be further described below with reference to the accompanying drawings.
[0021] like Figure 1 As shown, the remote control system for the fire crane of this utility model includes a controller, a wireless remote control transmitter, a wireless remote control receiver, an encoder, a high-voltage receiver, a high-voltage transmitter, a battery assembly, a level, a motor commutation device, an audible and visual alarm device, and a camera. The controller exchanges information with the battery assembly, the motor commutation device, the audible and visual alarm device, the encoder, the level, the high-voltage receiver, and the wireless remote control receiver via CAN communication.
[0022] The controller is responsible for receiving signals from various components, performing logic analysis, enabling motor forward and reverse rotation, high-voltage alarms, and other fault warnings, and transmitting the relevant information back to the display on the remote control handle to drive the corresponding indicator lights to illuminate, thus facilitating human-machine interaction.
[0023] One end of the wireless remote control transmitter is connected to the wireless remote control receiver, and the other end is connected to the camera. The entire system can be remotely controlled through the wireless remote control transmitter and the wireless remote control receiver.
[0024] One end of the motor commutation device is connected to the battery pack, and the other end is connected to the single-phase asynchronous motor. The motor commutation device consists of three sets of solid-state relays and three sets of AC contactors (K1 / K2 / K3). To achieve the rotation of the fire monitor, the power battery outputs AC power to the motor commutation device via an inverter. The motor commutation device is then connected to the controller and the single-phase asynchronous motor. Rotation is operated by a remote control handle via a wireless remote receiver, and the signal is transmitted to the controller. After judgment, the controller outputs a signal to the motor commutation device to realize the forward or reverse rotation of the motor, thereby driving the rotating equipment to rotate the fire monitor.
[0025] The high-voltage receiver is connected to the high-voltage transmitter, and the audible and visual alarm device consists of a rotating alarm light and a reversing alarm. The high-voltage transmitter is installed at both ends of the boom of the fire-fighting crane, and the high-voltage receiver is installed in the crane's control room. When the electric field strength received by the high-voltage transmitter is too high, it will trigger the alarm indicator light on the high-voltage receiver and emit a beeping sound, indicating that the high-voltage transmitter is too close to the high-voltage line. When the equipment is being operated remotely, the operator is far from the equipment, and the alarm from the high-voltage receiver alone is insufficient. Therefore, the signal is transmitted to the controller via the CAN bus. After the controller determines that an alarm state has been reached, it outputs a signal to the alarm light and alarm, triggering the audible and visual alarm to remind the operator to move the equipment away from the high-voltage line.
[0026] The encoder is installed on the rotating arm to detect the angular position of the fire monitor and display the angle information on the remote control's display screen, making it easier for operators to adjust the position of the monitor more accurately.
[0027] During firefighting, the water cannon of the fire crane is fixed to a rotating device at the top of the crane boom. As the boom extends and retracts, it reaches a specific height. The rotation of the water cannon is controlled primarily by manipulating a remote control handle on a wireless receiver. By moving the linear joystick on the remote control, the water cannon can rotate clockwise and counterclockwise. The remote control handle is equipped with a 5.0-inch display screen, which can display the working status and fault alarms, enabling human-machine interaction. The remote control also features emergency stop, fault analysis interface, camera switching knob, and general parameter settings, which assist in operation, enabling real-time monitoring of the working condition, rapid fault location, parameter adjustment, and emergency equipment shutdown, ensuring the safety and convenience of the operation process.
[0028] The system is equipped with a high-voltage alarm device. The high-voltage transmitter senses the electric field strength of the surrounding power lines and transmits the received signal to the high-voltage receiver. The high-voltage transmitter and receiver exchange information wirelessly. When the electric field strength reaches a certain level, that is, when the high-voltage transmitter is close to the high-voltage line, the controller will be triggered to output a control signal to activate the audible and visual alarm device, reminding the operator to pay attention to the power lines and move the equipment away from the power lines to avoid accidents.
[0029] The system uses CAN communication to exchange information between the remote controller and the battery management system (BMS). The remote controller monitors battery level and voltage in real time, preventing equipment malfunctions due to battery issues and ensuring firefighting progress. Simultaneously, the system uses an encoder to detect the water cannon's rotational position, enabling precise control of its location.
[0030] This utility model's remote control system uses a single-phase asynchronous motor to drive the equipment's rotation, and a motor commutation device to achieve forward and reverse rotation, thereby driving the equipment to rotate clockwise and counterclockwise. The control logic of the motor commutation device is as follows: Figure 2 As shown, the motor commutation device consists of three sets of solid-state relays (DA1 / DA2 / DA3) and three sets of CJX2s-2510220V AC contactors (K1 / K2 / K3). It controls the AC via DC, that is, the solid-state relays are controlled to turn on and off by the controller on the DC end, thereby indirectly controlling the AC contactors. It controls a large current with a small current, thus achieving safe control of the motor.
[0031] Motor start-up logic: Moving the remote control joystick upwards drives the motor to rotate forward. At this time, the controller sends a high-level voltage signal to the DA1 solid-state relay, energizing the DC terminal of DA1 and causing the AC terminal of the DA1 solid-state relay to close. This energizes the coil of the K1 AC contactor, closing the normally open switch K1 corresponding to the K1 AC contactor. Then, after a 2-second interval, the controller sends a voltage signal to the DA3 state relay, energizing the DA3 state relay and causing the AC terminal of the DA3 state relay to close. This energizes the coil of the K3 current contactor, closing the normally open switch K3 corresponding to the K3 current contactor. At this time, the inverter supplies 220V power to the single-phase asynchronous motor, driving the motor to rotate forward. Similarly, when the motor rotates in reverse, the controller first energizes the DA1 solid-state relay, then the DA2 solid-state relay, driving the K2 winding to commutate first, then supplying power, achieving safe commutation of the motor.
[0032] Motor stop logic: When the remote control transmitter joystick resets from forward or reverse rotation, the controller sends a low-level voltage signal to the DA3 solid-state relay. At this time, the DC terminal of DA3 is de-energized, causing the AC terminal of the DA3 solid-state relay to disconnect, thus de-energizing the coil of the K1 AC contactor. The normally open switch K3 corresponding to the K3 AC contactor then opens, preventing the inverter from supplying AC power to the motor, and the motor stops. After a 2-second interval, the controller sends a low-level voltage signal to the DA1 / DA2 solid-state relays. At this time, the DC terminals of DA1 / DA2 are de-energized, causing the AC terminals of the DA1 / DA2 solid-state relays to disconnect, thus de-energizing the coils of the K1 / K2 AC contactors. The normally open switches K1 / K2 corresponding to the K1 / K2 AC contactors then open.
[0033] This utility model can achieve the following functions:
[0034] Function 1: Control the rotation of the equipment. By tossing the rotation button on the remote control handle, a rotation signal is sent. After receiving the signal, the remote control receiver transmits it to the controller. The controller sends a command to the reversing device to drive the motor to rotate forward or backward, thereby driving the water cannon to rotate.
[0035] Function 2: High-voltage alarm for the remote control system. High-voltage transmitters are installed at both ends of the fire crane boom, and high-voltage receivers are installed in the crane operator's cab. The high-voltage transmitters receive the electric field strength of surrounding high-voltage lines and convert it into corresponding information, which is then wirelessly transmitted to the high-voltage receiver. The high-voltage receiver transmits this information to the controller via CAN communication. The controller determines the signal strength and activates the audible and visual alarm devices to provide early warning, reminding operators to pay attention to high-voltage lines and promptly adjust the position of the fire crane boom away from high-voltage lines to prevent accidents.
[0036] Function 3: Remote Equipment Status Monitoring. Wireless cameras are installed at both ends of the crane boom. Switching between the left and right camera monitoring interfaces is achieved via a knob on the remote control, allowing real-time monitoring of the surrounding environment and eliminating blind spots, greatly ensuring safety during fire rescue operations. The entire system uses a CAN topology framework to enable information exchange between devices. The remote control's display shows real-time information such as the device's operating status, battery level, battery voltage, and rotation angle. In the event of a single device malfunction, the system can provide the cause of the malfunction, facilitating operator use and achieving better human-machine interaction.
Claims
1. A remote control system for a fire-fighting crane, characterized in that, The system includes a controller, a wireless remote control transmitter, a wireless remote control receiver, an encoder, a high-voltage receiver, a high-voltage transmitter, a battery pack, a level, a motor commutation device, an audible and visual alarm device, and a camera. The controller communicates with the battery pack, motor commutation device, audible and visual alarm device, encoder, level, high-voltage receiver, and wireless remote control receiver via CAN communication. One end of the wireless remote control transmitter is connected to the wireless remote control receiver, and the other end is connected to the camera. One end of the motor commutation device is connected to the battery pack, and the other end is connected to the single-phase asynchronous motor. The high-voltage receiver is connected to the high-voltage transmitter.
2. The remote control system for the fire-fighting crane according to claim 1, characterized in that, The controller is responsible for receiving signals from various components, performing logical analysis, enabling motor forward and reverse rotation, high-voltage alarms, and fault warnings, and transmitting the relevant information back to the display on the remote control handle.
3. The remote control system for the fire-fighting crane according to claim 1, characterized in that, The high-voltage transmitter is installed at both ends of the boom of the fire-fighting crane, and the high-voltage receiver is installed in the crane's control room.
4. The remote control system for the fire-fighting crane according to claim 1, characterized in that, The encoder is installed on the rotating arm head and is used to detect the angular position of the fire monitor and display the angle information on the remote control's display screen.
5. The remote control system for the fire-fighting crane according to claim 4, characterized in that, The fire monitor is fixed to the rotating device at the top of the crane boom.
6. The remote control system for the fire-fighting crane according to claim 1, characterized in that, The single-phase asynchronous motor is used to drive the equipment to rotate, and the motor can be rotated in both directions through a motor commutation device.
7. The remote control system for a fire-fighting crane according to claim 6, characterized in that, The motor commutation device includes multiple sets of solid-state relays and multiple sets of AC contactors.
8. The remote control system for a fire-fighting crane according to claim 1, characterized in that, The audible and visual alarm device includes a rotating alarm light and a reversing alarm.