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Application of servo system in intelligent parcel sorting
At present, Europe and the United States and Japan as the representative of the developed countries, in the mail sorting system in the application of higher and higher degree of automation. Intelligent sorting system has become an indispensable part of large and medium-sized logistics centers, distribution centers and express transfer stations, and has been widely used in the postal industry.
Compared with the international logistics environment, the technology of sorting system in China is relatively backward compared with developed countries. Manual sorting is very common, electronic tags, RF and other auxiliary picking technologies are not used much, and intelligent picking system is even less. In general, the application of the sorting system in China shows the characteristics of the automation system and equipment not being widely used and the low degree of intensification.
Our company relies on the independent core technology superiority, accurately grasp the international advanced servo drive technology development pulse, successfully launched TS all digital high performance servo drive system products. Aiming at the market and development trend of intelligent sorting system in China, the company has successfully realized the control application of TS ac servo drive system in sorting industry. TS all digital high performance servo drive system has made great breakthroughs in communication function, servo full closed loop control, high precision positioning and servo field debugging, etc. Its control characteristics and technical level are synchronized with the development of foreign high performance servo system.
1. Working principle and schematic diagram of the automatic sorting system
On each parcel with a bar code, send a parcel by on a device to the sorting device, sorting by the belt conveyor by traction chain, mobile in sorting orbit, after the bar code scanner, parcel sorting information collection by the bar code scanner to the computer control system, in which data analysis processing, controlled by single chip microcomputer to calculate the parcel reach the mouth the time required to specify the sorting grid, so that the parcel arrived in sorting, mouth sends a signal to the computer control system, by controlling the electric drum start belt conveyor to parcel sorting to the sorting refers to freeze the mouth to achieve. This is shown below.
2. Selection of TS servo drive system application
Driver model: TS0040A22
Motor model: 60CB040C
Control mode: internal speed mode
Transmission mode: synchronous belt transmission plus 1:5 reducer
Maximum load (maximum package weight) : 35Kg
Maximum motor speed: 2600rpm
Acceleration time: 500ms
Deceleration time: 500ms
3. Outstanding advantages of TS servo drive
CANopen communication function: it realizes the application of CANopen communication protocol in the servo system, defines four kinds of standard communication interfaces: SDO(service data object), PDO(process data object), NMT(system management command) and special objects, and realizes the functions of communication, network management and emergency treatment. The physical medium is based on ISO1189 standard.
Servo full closed-loop control: aiming at the equipment with high positioning accuracy or dynamic response, it can solve the accuracy error caused by the intermediate link transmission, and finally realize high precision and responsive positioning.
High-precision positioning: equipped with 23-bit (8 million line) high-precision absolute value code plate, servo system control precision and overall performance synchronized with the development of foreign brand products, completely get rid of the domestic servo products low level and low price competition situation.
Servo field debugging: the function of oscilloscope is added to TS servo drive, which can monitor the characteristic curve and modify the drive parameters through PC, so as to facilitate the field debugging of servo characteristics.
4. Main features of automatic sorting system
(1) continuous and large quantities of goods are sorted
Because of the automatic operation mode of assembly line adopted in mass production, the automatic sorting system is not limited by climate, time and physical strength, etc., it can run continuously for a long time, and the number of pieces sorted per unit time is large. The automatic sorting system can run continuously for more than hundreds of hours, and can sort thousands of packaged goods per hour. If people are employed, they can only sort about 100 pieces per hour, and the sorting personnel cannot work continuously for too long under such labor intensity.
(2) extremely low sorting error rate
Automatic sorting system of sorting error size mainly depends on the accuracy of the information input by sorting size, which in turn depends on the sorting information input mechanisms, if using artificial keyboard input or voice recognition way, the error rate over 3%, such as using barcode scanning input, unless the bar code printing itself have a mistake, basic won't go wrong. Therefore, the current automatic sorting system mainly USES barcode technology to identify goods.
(3) the sorting operation is basically unmanned
One of the purposes of establishing the automatic sorting system is to reduce the use of personnel, reduce the labor intensity of employees and improve the use efficiency of personnel. Therefore, the automatic sorting system can minimize the use of personnel and basically achieve unmanned. The sorting operation itself does not need the use of personnel, and the use of personnel is only limited to the following work:
Manual operation of the sorting system.
When the delivery vehicle arrives at the receiving end of the automatic sorting line, the goods will be received manually.
The end of the sorting line collects and loads the sorted goods manually.
Operation, management and maintenance of automatic sorting system.
Material sorting is controlled by PLC or related board card. Moreover, the sorting system can be seamlessly connected with other logistics equipment flexibly to realize the distribution and management of material information flow. Its design adopts modular and standardized assembly mode, featuring flexible layout, convenient maintenance and overhaul.