This paper briefly introduces the working principle of the support controller, makes a thorough research and Analysis on the design of the automatic detection device of the support controller, and combined with this research, puts forward some suggestions and opinions, hoping to help the research of the automatic detection device of the hydraulic support controller and promote the self-determination of the hydraulic support controller. Development of Kinetic Detection Devices. Hydraulic support electro-hydraulic control system has become an important symbol of coal mine production automation. With the development and progress of science and technology, new hydraulic support electro-hydraulic control system has appeared and put into use. Correspondingly, it is necessary to develop the software of hydraulic support electro-hydraulic control system and test the reliability of the software. The lack of advanced and perfect testing means makes it difficult to improve the testing efficiency, which leads to the development of hydraulic support electro-hydraulic control system can not be effectively satisfied.
Hydraulic support electro-hydraulic control system mainly realizes the control of hydraulic support, but because there are many types of hydraulic support, the number of matching cylinders is also different, and the number of sensors is different, which ultimately leads to the poor requirement of intelligent level of hydraulic support controller. For the heterogeneity, it is necessary to design the automatic detection device of hydraulic support controller according to the actual situation, so as to realize the effective detection of hydraulic support, improve the detection efficiency and effectiveness, and reduce the detection cost. This paper carries out research and Analysis on this. In the electro-hydraulic control system of hydraulic support, the support controller belongs to its core structure. There are many units such as human-computer interaction, data acquisition, electromagnetic drive, storage, communication and so on. Different units have different structures and functions.
For example, the data acquisition unit is mainly used to collect sensor data, to collect information about the status of hydraulic support, roof pressure, etc. The storage unit is mainly used to store the support control program to avoid data loss due to unexpected circumstances. In the man-machine interaction interface, after the support control command is issued by the support controller operating keyboard, the command is transmitted to the controlled support controller by the communication unit.
After the control support receives the command, the I/O unit state is controlled to flip to drive the electromagnet action, the electrical signal is converted into mechanical signal, and the mechanical signal is converted into mechanical signal by means of the pilot valve. Hydraulic signal, with the help of the main valve to amplify the signal, the ultimate role in the cylinder to make the corresponding action. It can compile either single action control program or program control program. The sensor on the hydraulic support transmits the action information to the controller to realize the automatic control of the hydraulic support [1]. In the design of the automatic detection device, the wiring, principle and function of the support controller should be considered comprehensively. It can not only test the performance and function of the support controller, but also test the reliability of the support controller. For the detection of the bracket controller, it is necessary to compile the corresponding test program to ensure the coordination with the detection device, and ultimately complete the detection task. In the aspect of function testing, we need to pay attention to state transition and function testing. In the aspect of performance testing, we need to pay attention to performance indicators and trend testing. In the aspect of reliability testing, we need to pay attention to fatigue strength, anti-interference and pressure testing. Under the function of the upper computer test management system software, it can realize the coordinated operation between the program of the automatic test adding device and the bracket controller, and gradually complete the test and inspection work.
Figure 1 below shows the structure of an automatic keyboard key detection device. The control circuit can control the cylinder to make corresponding actions, such as extending and retracting, and then realize the automatic key operation. When programming, the control circuit can precisely control the key delay of the probe, and realize the functions of multi-key sequence control and double-key chain control. In addition, it can record the frequency and times of keyboard operation, so as to test the life of keyboard and realize automatic detection. The display unit has LED lamp and display. When the display unit detects automatically, it can be carried out by video image recognition method. The test program controls the opening or closing of the display array pixels, compares the video images, and sends out whether there is pixel damage. In addition, according to the gray level of the image, thermostatic element we can judge whether the brightness of the display meets the requirements. In the aspect of LED lamp test, the test program of running horse lamp is compiled to judge its brightness and whether there is any damage [2]. Sensor input signal consists of digital signal and analog signal.
In the aspect of analog signal input, D/A circuit is selected to carry out, and in the aspect of digital signal input, CAN bus and other interface circuits are used. Firstly, a standard signal source is constructed, and then the speed and accuracy of the sensor in signal acquisition and signal input are judged by comparing the standard signal with the collected signal. In addition, the field environment is simulated to determine whether the sensor meets the application requirements under different environmental conditions. The communication detection circuit is built between the bracket controllers to realize the interception and recognition of the communication signals between the controllers. By comparing the interception signals with the transmitting and receiving signals, the information of packet loss rate, delay and transmission load in the signal transmission process can be judged, so as to automatically detect the reliability of the communication unit. With the development of science and technology, the electro-hydraulic control system of hydraulic support has been optimized and applied continuously.
At present, the electro-hydraulic control system of hydraulic support has a certain difference in the use environment compared with the previous one. The intelligent level of its control system is higher and higher, the number of sensors in the system is more and more, and the control program is increased to a great extent. Complexity, in the hydraulic support electro-hydraulic control system, the application of automatic detection device of the support controller can greatly promote the research and development of the hydraulic support electro-hydraulic control system.