1 Composition of wireless remote control
Transmitter: The transmitter is portable, small in size, light in weight, and easy to operate. There are two kinds of operation modes: button type and remote sensing type. The button type is suitable for simple small cranes, and the remote sensing type is suitable for all types of cranes. The transmitter power supply is a rechargeable battery, which is impact resistant, waterproof, dustproof, oil resistant, small in size and light in weight. Receiver: The receiver consists of an antenna, high-frequency receiving components, CPU, safety circuit, output relay board, etc. After receiving the operation instruction, the receiver generates a control signal through amplification, demodulation, decoding and identification, and controls the operation of the corresponding mechanism of the crane. Actuator: The actuator is composed of a relay and a contactor, which controls the operation of the corresponding mechanism of the crane.
2 The safe operation of the remote control
Emergency stop function In case of misoperation or abnormal crane action, the operator uses the emergency stop switch to quickly cut off the control power supply on the crane, and the transmitter stops sending operating instructions. The emergency stop switch cannot be automatically reset. After an emergency stop, the specified start-up procedure must be executed before the operation can be restarted. Zero protection Zero protection should meet two requirements: One is zero protection before operation. All operating handles are required before operation
The operation command can only be sent in the zero position. The second is zero protection during operation
Loss of voltage protection In case of unexpected power failure, the crane receiver should stop working. After the power supply is restored, the remote control must follow the normal operating procedures
Switch on the main power supply of the crane. Transmitter when the power supply voltage is too low. A stop operation command should be issued through the self-check function. Safety Interlock Cut off the control loop that moves in the opposite direction when hoisting and moving of cranes and carts and carts move. When the ordinary crane is changed to remote control. All retain the original operating mode of the cab. When designing and installing the remote control, the two operation modes must be interlocked. When realizing multi-point control of the crane, the receiver should be equipped with operation interlock. Ensure that only the instructions of one transmitter are executed at the same time.
Address code The address code is unique. When the transmitter and receiver have the same encoding and decoding settings, the remote control can work normally. The remote control mainly adopts the time division system periodic digital transmission method that can check the error code. The so-called digital transmission method is to distribute the information of operating the switch according to time and transmit it with serial binary code. This method is suitable for transmitting multiple operation instructions, can check error codes, prevent misoperation, and improve safety.
Key switch Turn on this switch to turn on the transmitter power. The key switch can ensure that the remote control is operated by a dedicated person.
Self-checking function: This function can be automatically executed when the specified control distance is exceeded, obstacles within the control range hinder the command transmission, the command signal is affected by electromagnetic interference and cannot be executed reliably, and the transmitter power supply voltage is reduced and reliable transmission of commands cannot be guaranteed. Cut off the main power supply of the crane. And the operator will restart the operation according to the normal start-up procedure. At present, the main technology adopted for self-inspection is instruction recognition technology. The receiving system checks each group of data codes received during the receiving process. If an error code is recognized, it will wait for the next set of data codes. If no consecutive data codes are detected at this moment, it checks in turn.
1 Composition of wireless remote control

Transmitter: The transmitter is portable, small in size, light in weight, and easy to operate. There are two kinds of operation modes: button type and remote sensing type. The button type is suitable for simple small cranes, and the remote sensing type is suitable for all types of cranes. The transmitter power supply is a rechargeable battery, which is impact resistant, waterproof, dustproof, oil resistant, small in size and light in weight. Receiver: The receiver consists of an antenna, high-frequency receiving components, CPU, safety circuit, output relay board, etc. After receiving the operation instruction, the receiver generates a control signal through amplification, demodulation, decoding and identification, and controls the operation of the corresponding mechanism of the crane. Actuator: The actuator is composed of a relay and a contactor, which controls the operation of the corresponding mechanism of the crane.

2 Safe operation of the remote control

Emergency stop function In case of misoperation or abnormal crane action, the operator uses the emergency stop switch to quickly cut off the control power supply on the crane, and the transmitter stops sending operating instructions. The emergency stop switch cannot be automatically reset. After an emergency stop, the specified start-up procedure must be executed before the operation can be restarted. Zero protection Zero protection should meet two requirements: One is zero protection before operation. Before operation, all operating handles are required

The operation command can only be sent in the zero position. The second is zero protection during operation

Loss of voltage protection In case of unexpected power failure, the crane receiver should stop working. After the power supply is restored, the remote control must follow the normal operating procedures

Switch on the main power supply of the crane. Transmitter when the power supply voltage is too low. A stop operation command should be issued through the self-check function. Safety Interlock Cut off the control loop that moves in the opposite direction when hoisting and moving of cranes and carts and carts move. When the ordinary crane is changed to remote control. All retain the original operating mode of the cab. When designing and installing the remote control, the two operation modes must be interlocked. When realizing multi-point control of the crane, the receiver should be equipped with operation interlock. Ensure that only the instructions of one transmitter are executed at the same time.

Address code The address code is unique. When the transmitter and receiver have the same encoding and decoding settings, the remote control can work normally. The remote control mainly adopts the time division system periodic digital transmission method that can check the error code. The so-called digital transmission method is to distribute the information of operating the switch according to time and transmit it with serial binary code. This method is suitable for transmitting multiple operation instructions, can check error codes, prevent misoperation, and improve safety.

Key switch Turn on this switch to turn on the transmitter power. The key switch can ensure that the remote control is operated by a dedicated person.

Self-checking function: This function can be automatically executed when the specified control distance is exceeded, obstacles within the control range hinder the command transmission, the command signal is affected by electromagnetic interference and cannot be executed reliably, and the transmitter power supply voltage is reduced and reliable transmission of commands cannot be guaranteed. Cut off the main power supply of the crane. And the operator will restart the operation according to the normal start-up procedure. At present, the main technology adopted for self-inspection is instruction recognition technology. The receiving system checks each group of data codes received during the receiving process. If an error code is recognized, it will wait for the next set of data codes. If no consecutive data codes are detected at this moment, it checks in turn.