First, the crane with wireless remote radio controlled system must have the following characteristics
(A) reliability
Once the remote radio controlled cranes failure, will affect the production of normal lines. Therefore, the remote control system and remote control system hardware must have a high degree of reliability.
(B) security
Radio controlled crane is a lifting machine control device, if the action is wrong, will occur material damage, injury accidents. Therefore, it is necessary to ensure that the remote control system of one hundred percent of the safety, with the operator should be able to directly carry out the emergency stop and the system automatically stops the safety protection [1].
(C) strong anti-interference
Can not be welded, electric furnace and crane inverter electromagnetic interference, etc., can be used in a small area at the same time more than one, do not interfere with each other.
- Can be used in harsh environments
Must have a strong dust, gas, oil, impact resistance and other properties.
- Lightweight and easy to operate
The transmitter system is carried by the operator for operation, so it should be small in size, light in weight and easy to carry.
Second, the basic structure of the remote control and the principle
At this stage, the use of wireless remote control technology on the crane mainly includes infrared remote control and wireless remote control. Infrared wireless remote control mode is relatively low-cost, but will be subject to the constraints of the information launch distance and direction; in the industrial field often use wireless signal remote control mode, which consists of a transmitter, receiver, and the implementation of the unit.
(a) The transmitter contains a coding circuit and a transmitting circuit, and its housing is often impact-resistant, oil-resistant, and dust-proof, with a small size and light weight, making it easy to carry and operate. The operator controls the encoding circuitry with a manipulator, which causes the encoding circuitry to generate information commands such as frequency and phase in a timely manner. At the same time, the transmitter circuit generates high-frequency carrier wave for the operation command, and combined with the command mode of the transmitter, it is categorized into key type and joystick type. The key type can realize two-speed control, and the joystick type can realize multi-position control.
(b) The receiver is composed of antenna, safety circuit, receiving circuit and relay, etc., of which the receiving circuit is composed of high-frequency and regulator, the signal received by the antenna is independently selected under the action of the high-frequency part and transmitted to the regulator, which will lead to the formation of the circuit decoding of the operation command information; during the actual use of wireless remote control, the receiving method of the receiver has relay output and analog output, etc. (c) The executive unit is the crane’s circuit decoding.
(c) The execution unit is the relay or contactor of the crane, and the control of the crane is realized by controlling the corresponding relay or contactor of the crane. In the process of wireless remote control operation, the transmitter in the coding circuit can be processed and processed staff commands to generate digital coding pulse, and in the pulse signal contains key information and address data, and then in the role of the modulation circuit, the full pulse data into a wireless signal, in the form of electromagnetic waves into the air, prompting the crane executive unit can output accurate pulse signals.
Third, Radio controlled crane must have the following characteristics
(A) reliability
Once the remote control system failure, will affect the production of normal lines. Therefore, the remote control system and remote control system hardware must have a high degree of reliability.
(B) security
Remote control system is a lifting machine control device, if the action is wrong, will occur material damage, injury accidents. Therefore, it is necessary to ensure that the remote control system of one hundred percent of the safety, with the operator should be able to directly carry out the emergency stop and the system automatically stops the safety protection [1].
(C) strong anti-interference
Can not be welded, electric furnace and crane inverter electromagnetic interference, etc., can be used in a small area at the same time more than one, do not interfere with each other.
- Can be used in harsh environments
Must have a strong dust, gas, oil, impact resistance and other properties.
- Lightweight and easy to operate
The transmitter system is carried by the operator for operation, so it should be small in size, light in weight and easy to carry.
Second, the basic structure of the remote control and the principle
At this stage, the use of wireless remote control technology on the crane mainly includes infrared remote control and wireless remote control. Infrared wireless remote control mode is relatively low-cost, but will be subject to the constraints of the information launch distance and direction; in the industrial field often use wireless signal remote control mode, which consists of a transmitter, receiver, and the implementation of the unit.
(a) The transmitter contains a coding circuit and a transmitting circuit, and its housing is often impact-resistant, oil-resistant, and dust-proof, with a small size and light weight, making it easy to carry and operate. The operator controls the encoding circuitry with a manipulator, which causes the encoding circuitry to generate information commands such as frequency and phase in a timely manner. At the same time, the transmitter circuit generates high-frequency carrier wave for the operation command, and combined with the command mode of the transmitter, it is categorized into key type and joystick type. The key type can realize two-speed control, and the joystick type can realize multi-position control.
(b) The receiver is composed of antenna, safety circuit, receiving circuit and relay, etc., of which the receiving circuit is composed of high-frequency and regulator, the signal received by the antenna is independently selected under the action of the high-frequency part and transmitted to the regulator, which will lead to the formation of the circuit decoding of the operation command information; during the actual use of wireless remote control, the receiving method of the receiver has relay output and analog output, etc. (c) The executive unit is the crane’s circuit decoding.
(c) The execution unit is the relay or contactor of the crane, and the control of the crane is realized by controlling the corresponding relay or contactor of the crane. In the process of wireless remote control operation, the transmitter in the coding circuit can be processed and processed staff commands to generate digital coding pulse, and in the pulse signal contains key information and address data, and then in the role of the modulation circuit, the full pulse data into a wireless signal, in the form of electromagnetic waves into the air, prompting the crane executive unit can output accurate pulse signals.
Third, the crane using remote control system has the following advantages
(A) save labor
For bridge, gantry cranes and truck cranes and other loading and unloading equipment, the operation of the hook can be undertaken by a person, the operator can be operated directly, do not need to command. For low efficiency lifting equipment, a person can simultaneously manage more than one crane equipment. Can be maneuvered in the crane at the same time, to complete its associated conveyor belt, feeder, handling trucks and other equipment control and management.
(ii) Improvement of work efficiency
As the operator and the ground command is undertaken by one person, the operator can make his own judgment and carry out the operation, which improves the accuracy of the operation and work efficiency. It avoids the misunderstanding between the operator and the ground command in the past, and is suitable for equipment assembly and other precision installation operations. Save the driver on and off the crane brought about by the many inconveniences.
(C) the improvement of environmental safety
In toxic gases, high temperature, dusty and dangerous operating sites, you can choose a good environment and safe location for operation, the operator’s personal safety is protected, the operating conditions have been improved. Improvement
Fourth, the application of wireless remote control technology on the crane thinking
Radio controlled crane needs to pay attention to several aspects during the application:
(a) with the help of wireless remote control technology on the crane zero and overcurrent processing, regardless of whether the use of operating machines or command control machines, operating handles and command control machines need to be adjusted to the zero position, which can ensure that the remote control is smoothly connected to the power supply of the crane and the crane. In the event of an accidental power failure of the crane power supply, the remote control will react immediately and reconnect with the crane power supply under the correct program. If the remote control own power supply voltage is insufficient phenomenon, the remote control can independently control the crane, prompting the crane to stop running and work [2].
Crane power supply of all executive units need to lead in the total power contactor line port, while the design of the air circuit breaker, in the event of an accident, the total power contact machine and circuit breaker operation, the total power supply of all units cut off as a whole, and then stop running and working, to ensure the safety of crane operation. In addition, the wireless remote control system needs to be combined with the actual operation of the crane to set up the corresponding electrical interlocking devices, such as the installation of wireless remote control switches in the operator’s room, the installation of electrical interlocking device equipment, prompting the relay as well as the contactor both in the forward and reverse operating state.
(B) crane operation site set up in the wireless remote control device may be affected by signal interference affects the operational efficiency, and even lead to crane error action, then the relevant personnel need to take the isolation of the wireless remote control system, and ensure that all the cables in the receiving sensor has strong shielding function, to facilitate to meet the needs of cranes working in adverse environments.
(C) wireless remote control device emergency stop function is divided into autonomous stop and passive stop, to avoid the emergence of erroneous actions, the switch of the autonomous stop can not be set to automatic reset mode, but the switch of the autonomous stop is set to the time less than the switch of the passive stop, generally no more than 0.5s.
- Radio controlled crane in the field of crane applications
Radio controlled crane is currently used in a wide range of fields, the following aspects of industrial wireless remote control system in the field of crane applications.
(I) Safety
Operator safety: in toxic gases, high temperature, dusty and dangerous operating sites, you can choose a good environment, and safe location for operation, the operator’s personal safety is protected. Avoid the crane work is not in the starting position and the operator needs to rest and can not get off the crane .
Equipment safety: the operator can operate directly, greatly reducing the misunderstanding between the conductor and the operator, reduce misuse, improve the safety of the lifting equipment itself and the safety of lifting equipment peripheral equipment.
(ii) Economy
Crane wireless remote control system, each crane to reduce at least one operator, to a factory and mine with 100 cranes, for example, 100 cranes if they are full load 24-hour operation, need 400 crane drivers, 400 lifting workers. The addition of wireless remote control system for cranes can reduce the number of personnel by at least 400.
The main control spare parts an average of $15000 per year (the main command controller, linkage platform full load 24h running life for an average of one year; high-quality remote control system transmitter full load 24h running life for an average of more than 5 years. The average spare parts required for the remote control system do not exceed $1500 yuan per set every five years, and the cost of spare parts will be reduced by 80%.
Conclusion:
Cranes occupy an important position in industrial enterprises, and it is of practical significance and value to carry out research on the application of wireless remote control technology on cranes. For the use of wireless remote control technology in cranes, the relevant personnel should have a comprehensive grasp of the basic structure of wireless remote control and application principles, and combined with the actual development needs of industrial enterprises, to find the advantages of wireless remote control technology used in cranes to accelerate the modernization and development of industrial enterprises.
has the following advantages
(A) save labor
For bridge, gantry cranes and truck cranes and other loading and unloading equipment, the operation of the hook can be undertaken by a person, the operator can be operated directly, do not need to command. For low efficiency lifting equipment, a person can simultaneously manage more than one crane equipment. Can be maneuvered in the crane at the same time, to complete its associated conveyor belt, feeder, handling trucks and other equipment control and management.
(ii) Improvement of work efficiency
As the operator and the ground command is undertaken by one person, the operator can make his own judgment and carry out the operation, which improves the accuracy of the operation and work efficiency. It avoids the misunderstanding between the operator and the ground command in the past, and is suitable for equipment assembly and other precision installation operations. Save the driver on and off the crane brought about by the many inconveniences.
(C) the improvement of environmental safety
In toxic gases, high temperature, dusty and dangerous operating sites, you can choose a good environment and safe location for operation, the operator’s personal safety is protected, the operating conditions have been improved. Improvement
Fourth, the application of wireless remote control technology on the crane thinking
Wireless remote control technology needs to pay attention to several aspects during the application:
(a) with the help of wireless remote control technology on the crane zero and overcurrent processing, regardless of whether the use of operating machines or command control machines, operating handles and command control machines need to be adjusted to the zero position, which can ensure that the remote control is smoothly connected to the power supply of the crane and the crane. In the event of an accidental power failure of the crane power supply, the remote control will react immediately and reconnect with the crane power supply under the correct program. If the remote control own power supply voltage is insufficient phenomenon, the remote control can independently control the crane, prompting the crane to stop running and work [2].
Crane power supply of all executive units need to lead in the total power contactor line port, while the design of the air circuit breaker, in the event of an accident, the total power contact machine and circuit breaker operation, the total power supply of all units cut off as a whole, and then stop running and working, to ensure the safety of crane operation. In addition, the wireless remote control system needs to be combined with the actual operation of the crane to set up the corresponding electrical interlocking devices, such as the installation of wireless remote control switches in the operator’s room, the installation of electrical interlocking device equipment, prompting the relay as well as the contactor both in the forward and reverse operating state.
(B) crane operation site set up in the wireless remote control device may be affected by signal interference affects the operational efficiency, and even lead to crane error action, then the relevant personnel need to take the isolation of the wireless remote control system, and ensure that all the cables in the receiving sensor has strong shielding function, to facilitate to meet the needs of cranes working in adverse environments.
(C) wireless remote control device emergency stop function is divided into autonomous stop and passive stop, to avoid the emergence of erroneous actions, the switch of the autonomous stop can not be set to automatic reset mode, but the switch of the autonomous stop is set to the time less than the switch of the passive stop, generally no more than 0.5s.
- Industrial wireless remote control system in the field of crane applications
Industrial wireless remote control system is currently used in a wide range of fields, the following aspects of industrial wireless remote control system in the field of crane applications.
(I) Safety
Operator safety: in toxic gases, high temperature, dusty and dangerous operating sites, you can choose a good environment, and safe location for operation, the operator’s personal safety is protected. Avoid the crane work is not in the starting position and the operator needs to rest and can not get off the crane .
Equipment safety: the operator can operate directly, greatly reducing the misunderstanding between the conductor and the operator, reduce misuse, improve the safety of the lifting equipment itself and the safety of lifting equipment peripheral equipment.
(ii) Economy
Crane wireless remote control system, each crane to reduce at least one operator, to a factory and mine with 100 cranes, for example, 100 cranes if they are full load 24-hour operation, need 400 crane drivers, 400 lifting workers. The addition of wireless remote control system for cranes can reduce the number of personnel by at least 400.
The main control spare parts an average of $15000 per year (the main command controller, linkage platform full load 24h running life for an average of one year; high-quality remote control system transmitter full load 24h running life for an average of more than 5 years. The average spare parts required for the remote control system do not exceed $1500 yuan per set every five years, and the cost of spare parts will be reduced by 80%.
Conclusion:
Cranes occupy an important position in industrial enterprises, and it is of practical significance and value to carry out research on the application of wireless remote control technology on cranes. For the use of wireless remote control technology in cranes, the relevant personnel should have a comprehensive grasp of the basic structure of wireless remote control and application principles, and combined with the actual development needs of industrial enterprises, to find the advantages of wireless remote control technology used in cranes to accelerate the modernization and development of industrial enterprises.