Construction vehicles are the backbone of a construction project. Due to their emergence, the progress of construction projects has been doubled, reducing the workload of manual work. Looking at the work of engineering vehicles, people can not help but lament the power of machines and technology. They are used for engineering carrying, excavation, repair, and even combat. Common engineering vehicles include: heavy transport vehicles, large cranes, excavators, bulldozers, road rollers, loaders, electric repair vehicles, engineering rescue vehicles, armored engineering vehicles (combat engineering vehicles), oxidant sewage treatment engineering vehicles.
After years of development, the manufacturing technology of construction machinery has been relatively mature, and the products of various enterprises are similar. In this context, some companies have begun to turn their attention to the field of information technology and intelligence of engineering machinery products. As an important aspect of informatization, wireless remote control technology not only enhances the competitiveness of products, but also provides convenience and security for operators to use construction machinery.
First, why use wireless remote control?
There are two major drawbacks to current construction vehicles:
(1) The working environment is bad: the construction objects of construction machinery are usually heavy construction materials (steel, concrete, stone and sediment). There are even radioactive threats in the accident rescue of the Fukushima nuclear power plant. Therefore, the working environment of construction machinery is generally poor. In severe cases, it will cause loss of life and property.
(2) The operation space is small: most of the operation of the current construction machinery is operated by the operator in the cab. Because the cab environment is closed and the field of view is narrow, it is difficult to have a clear global understanding of the entire construction site. When a robot arm or other object obscures the line of sight between the operator and the construction site, it is easy to reduce the construction efficiency. If the on-site command is improperly matched, it may even lead to a construction accident.
Therefore, the application of the wireless remote control technology can completely solve the above problems, so that the operator does not have to be restrained by the cab, and can freely walk and observe at the construction site and remotely control the construction machine, thereby improving work efficiency and safety. Wireless remote control is becoming an irreplaceable device in hazardous and harsh work environments.
Second, the rapid solution of engineering vehicle wireless remote control
For general construction machinery, it must include the five basic systems of power system, transmission system, chassis travel system, operation control system and execution system (as shown).
The power system mainly adopts the diesel engine. The reason is that it has the advantages of good fuel economy and high power. The main types of transmission systems of engineering machinery include mechanical transmission, hydraulic mechanical transmission, hydraulic transmission and electric transmission. Chassis walking system mainly has two types of wheeled and crawler type, in addition to walking belt type walking mechanism. The steering control system generally includes two parts: a chassis operating system and a work implement operating system; the executing system mainly includes various types of working devices and mechanisms, and the types thereof are various.
Among the five basic systems, the most important is the operation control system, which is the "brain" of engineering vehicles. CAN communication is used between the traditional engineering vehicle operating console and the operation control system, and the general controller has a CAN interface. Therefore, to realize the wireless remote control of the engineering vehicle, it is only necessary to convert the CAN communication into wireless communication. The CANWIFI-200T module independently developed by Zhiyuan Electronics can realize the conversion of CAN communication to WIFI communication, which can realize wireless remote control quickly, and the controller does not need to be changed internally.
Why use CAN to WIFI? WIFI communication has an unparalleled advantage in terms of transmission rate compared to ZIGBEE, 433 and other wireless communication methods. The construction vehicle has a high body and a large volume. Even if wireless remote control is implemented, the operator has a blind spot on the ground, and there are many inconveniences for the operation of the vehicle. Therefore, after implementing the wireless remote control, it is necessary to add a video monitoring system to transmit the video information to the wireless console, so that the operator can monitor the position and mechanical movement of the engineering vehicle in an all-round manner, which is safer and more reliable. The best way to wirelessly transmit video is through WIFI.
Third, the advantages of wireless remote control
1 Saving human resources: Take the bridge crane as an example: operation, mooring, and loading and unloading can be undertaken by one person alone without command.
2 Improve work efficiency: the operator judges independently, the accuracy and consistency of the operation are significantly improved than before; avoiding the operator's high temperature in the cab at high temperature and the work efficiency caused by physical discomfort is not high.
3 Improved operating environment: The operator can choose the best angle to avoid the operation position with poor visibility and serious pollution; prevent the operator from being attacked by harmful gases.
4 Improved safety reliability: Since the command link is omitted, misunderstanding caused by improper command is avoided; the operator can operate from the command angle, more intuitively see the situation of the hoisted items, and avoid the tower crane The operator is insecure in the driving room in bad weather, and the operator communicates with the commander at high altitude and causes unnecessary accidents.
5 Reduced manufacturing and maintenance costs: The replacement of the cab by a remote control system has long been a reality and has become a standard production process.
Fourth, CANWiFi-200T converter introduction
CANWiFi-200T converter can realize the function of CAN-bus data and WiFi data transmission. It integrates 2 channels of CAN-bus interface, 1 channel WLAN interface and 1 channel LAN interface, and comes with TCP/IP or UDP protocol. Stack, the user can easily complete the interconnection of CAN-bus network and WiFi network, and easily realize the wireless remote control of engineering vehicles.
The CANWiFi-200T is an industrial grade product that can operate over the -40°C to 85°C temperature range. With TCP Server, TCP Client, UDP and other working modes, support 254 TCP connections or up to 6 & TImes; 254 UDP "connections".
PCB circuit boards are widely used in automotive electronics, including power control systems, safety control systems, body electronics systems, and communications.
In the future, automotive electronics will move toward the trend of big functions, namely: mobile communications, multimedia leisure, safe driving assistance (including automatic driving), ride comfort, energy saving (including electric vehicles), protection and preservation, all of which pose challenges to the PCB industry. At the same time, it also provides good development opportunities. For example, autonomous driving will bring large-scale applications of millimeter-wave radar, so the demand for high-frequency PCB boards for radars will be significantly increased, and the value is significantly higher than traditional PCB boards; BMS in electric vehicles is one of the core components. PCB board is one of the basic components of BMS and will benefit from the development of electric vehicles.
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