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1. System background
At present, in some leaky coal mines or mining enterprises, there are many engineering vehicles responsible for pulling soil, sand, and coal. These vehicles operate 24 hours a day, and there are many vehicles connected to each other. Therefore, every day, coal mining enterprises must assign special personnel at specified locations to carry out vehicle counting statistics, count how many times the vehicles are pulled each day, and check whether each vehicle is fully pulled every time, whether it is empty, and whether the returned vehicle is sticky.钭 etc. If there are fewer vehicles, mistakes will occur once there are too many vehicles. Such mistakes will bring economic losses to enterprises and car owners and cause conflicts. In addition, there will be human accidents and high error rates.
In order to solve these problems, Suzhou Luhe Electronic Technology Co., Ltd. has introduced a solution for automatic counting of vehicle in and out. The above problems can be solved. The following benefits can be achieved through this system:
1. Improve the accuracy of counting
2. Save time and improve efficiency, which is good for car owners and coal mines
3. Reduce economic losses caused by human factors
The system configuration has functions such as automatic card issuance, video capture, voice prompts, LED screen display, etc. (optional)
Second, the realization of the schematic diagram
Long-distance radio frequency identification is based on 2.4G long-distance microwave signal transmission technology, throughCard readerTo read the signal actively sent by the active electronic tag, the card reader sends the information and data into the computer system for data collection, login and processing. And with the corresponding software settings to achieve real-time alarm and other functions.
Three, design ideas
First, install a vehicle electronic tag for each vehicle that needs to be counted, usually on the windshield of the vehicle. Then set up a counting acceptance room or monitoring center in the place that needs to be monitored (it can also be a virtual inspection room with leaks, this depends on the actual site), and then connect the equipment and connect to the host computer. The user can follow the on-site situation Adjust the reading distance of the card reader. Generally, it should be controlled at a distance of about 30-50 meters. When everything is ready, you can start the counting management software to perform counting statistics. It should be noted that: in the card reading area, the time the vehicle stays should not be too long.
The first card reader that defines the approach direction of the vehicle is 1, and the second reader is 2 (that is, the first one in the exit direction). When a vehicle passes by two card readers, the card reader will automatically read the vehicle card number, and the card reader will send the read card number to the computer. If the result of the computer analysis is read by the card reader 1 first When the card number is reached, the card number is read by the card reader 2, then it is judged that the vehicle is entering the field, and statistical records are performed; if the result of the computer analysis is that the card number is read by the card reader 2 first, and then the card number is read by the card reader 1 , Then it is judged that the car company is out of the field, and statistical records are carried out. At the same time, the statistical data will be displayed on the LED display screen in time (the display content is the vehicle number and the number of arrivals). The communication connection between the card reader and the computer is through RS485. When the communication distance between the card reader and the computer is greater than 600 meters, we can consider adding optical fiber conversion. In this way, we count the number of times the vehicle has passed the house inspection. At the same time, the system is equipped with infrared beams and cameras, which are mainly used to take photos and captures of the approaching vehicles, which is convenient for future data reference and is more intuitive and accurate. The distance between the 2 pairs of infrared beams is generally less than the length of the car body and it is recommended to be one-third of the length of the car sound. Only when the two pairs of infrared beams sense signals together, the camera will start to take pictures.
Moreover, a display screen is provided at the door of the relevant passage where the card reader is located, and the display screen can be large or small to choose from. The small display is cheap and less investment, but the amount of information displayed at the same time is small. It can only display the information of one vehicle. When several vehicles pass by at the same time, it cannot display all the vehicle information at the same time; the large display can display more at the same time Information, when three or four vehicles pass by at the same time, all vehicle information can be displayed at the same time, but the price investment will be correspondingly higher. At the same time, according to the customer’s requirements, a related voice system can also be provided to cooperate with the entire system to send out voice signals to notify the drivers of related vehicles that the vehicle information has been recorded.
According to the relevant needs of customers, daily reports, monthly reports, etc. can be generated. You can print the recorded information.
4. System functions, features and advantages
Long-distance reading is easily achieved within 10 meters. Due to the actual requirements of vehicle counting, the card reading distance should not be too long. This solution does not need to be manually approached to swipe the card or to pass in a designated area to be recognized. Fully automatic recognition is realized, which can avoid problems such as the driver having to move the window close to the reader to swipe the card in bad weather. Advanced anti-collision technology supports multi-label recognition and writing, which can effectively alleviate the jam problem caused by too many vehicles entering and exiting the warehouse and queuing credit cards during peak hours;
Highly stable active cards have stable reading distance and are not easily affected by the surrounding environment. Moreover, the active card can effectively break through the shielding effect of the automobile’s explosion-proof metal mesh, and smoothly exchange data with the reader. Using channel isolation technology, multiple devices do not interfere with each other;
The high-speed identifiable identification card can move at a speed of up to 200 km/h.
Reliability The ambient temperature is -40℃-85℃, which can operate normally (MTBF≥70000 hours), especially under the low temperature in the north and high temperature in the south, it has more advantages, which can effectively resist the high dust and pollution in the air in the coal mine area. The normal use of the equipment can be ensured in environments such as heavy objects and rainy weather.
Security encryption calculation and authentication to ensure data security and prevent link eavesdropping and data cracking;
Anti-interference has no special requirements for various interference sources on site, meets the requirements of industrial environment, and is convenient and simple to install.
Ultra-low power consumption, long service life, low average cost, safer and healthier for the human body, and no radiation damage.
Multi-identification can identify more than 200 signs at the same time. If there are more than 200 signs on the spot, we have a way to deal with it.
There is no need to apply for and pay for the ISM microwave frequency band that is open worldwide.
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