Chapter 1 Introduction 1.1 Overview of the site are based on the metal structure bridge crane girder bridge as the main bearing member was hung above the workshop, warehouse and open yard cross between fixed and can move along the track, extract device Suspension In the run along the bridge lifting small car, so the weight of the extract on the device to achieve the level of vertical lifting and moving, as well as some special process to complete the crane operation, called "crane" or "traffic" on the habit. It has a simple structure, easy to operate, easy to maintain, and does not account for lifting large area of ??ground operations, etc., is that enterprises are indispensable lifting equipment. With the rapid development of the national economy, the level of information continues to increase, the popularity of ERP, MES system, improve production efficiency and security more seriously, to achieve mechanical automation is a common means of lifting machinery as modern production indispensable equipment, is lifting, transport, handling and installation personnel carriers widely used in various industries metallurgy, coal, electricity and other various materials and other operations, thereby greatly reducing the intensity of physical labor, improve labor productivity. To achieve the most basic question of lifting machinery automation is the displacement detection, the detected position information to the programmable logic controller (PLC), controlled by PLC frequency converter, and then take the line of the motor speed control, you can achieve automatic Traveling, Automatic positioning purposes. Positioning 1.2 currently used to detect the position of the current traffic is mostly used optical encoder device (optical encoder), laser displacement sensors, limit switches walking, RFID way. Photoelectric encoder device, the entire device is mounted in the drive motor of a front portion of the metal housing, and engaged by the disc-shaped gear rack positioning car, through a drive shaft encoder. And positioning the same vehicle the disc-shaped circumferential drive pinion gear circumference. Encoders from the bottom up through the drive gear reducer, coupling the drive to achieve the position detection and location vehicles. These types are a way to detect the position of some defects, specific performance is as follows: 1) optical encoder wheel slip device will form the accumulated error, the relative positioning of the mechanical contact work; 2) laser displacement sensor in an unclean environment will lose effect, rail settlement will cause the vehicle to shake Traveling target reflectors are not allowed and will lead to a position detection allowed; 3) travel limit switch because it is the point positioning, position detection blind spot for continuity; 4) RFID is a wireless way point positioning, there is leakage phenomenon reading, delay larger; so when these types of sensors to detect the position of the majority of the mechanical type, low sensitivity, short life, failure rate, low reliability, cumbersome to operate, and there humping links (ie out of control area), resulting in a reliable and stable operation of semi-automatic operation difficult. Because the traffic is larger equipment, its inertia, when to start and stop is hard, so in the work process will produce a lot of shock and vibration, noise pollution, seriously affecting their safety and related parts life, easy to damage the device, which controls the precise location of the device is very important. 1.3 The system uses the location technology the system uses the car to install the line detection technology scale ruler precise positioning system to achieve accurate detection of lane position. Scale ruler high precision driving position is detected, the signal is stable and reliable. In the case of a vehicle in good condition, with full-line automatic operation mode, ie as long as starting conditions, the automatic start button is pressed, the system will be fully automatic operation, the central control room operator only play a monitoring role in the event of mechanical breakdown or accident When the situation, according to the automatic stop or emergency stop button, the auto remote operation. Chapter 2 scale ruler precise positioning system 2.1 scale ruler scale ruler brief description of the system to pinpoint system includes a ground electrical cabinet (including scale generation instrument, etc.), an onboard electrical cabinet (including scale analyzers, etc.), scale ruler and tour ruler pointers. Scale ruler which is made of PVC wire flat synthetic material shell material and the internal laws of the preparation according to Gray code structure, similar to a graduated scale, usually installed in the locomotive moving along the side of a single orbit, or laying along the running track On the ground, or will be installed on the fence post beside the track can be, how long it needs to detect displacement laying on how long scale ruler; vernier pointer mounted on the locomotive, a location where the identification of the locomotive. Vernier scale ruler pointer relative movement parallel non-contact, vernier scale that is a pointer to the current position value, you can get the amount of displacement in the car or on the ground, without the initial reference point, positioning accuracy 5 mm, 2 mm resolution. 2.2 System Principles scale ruler scale ruler precise positioning system using electromagnetic induction principle to detect the amount of displacement of the mobile device, when vernier pointer coil pass into alternating current, in the vicinity of vernier pointer produces an alternating magnetic field. Approximate scale ruler in an alternating magnetic field evenly distributed, each of scale ruler wire will be induced electromotive force. Scale instrument signal to generate the scale ruler induced by electromagnetic coupling loop. Scale analyzer signal received phase comparison. Signal phase with the phase of the signal line intersecting parallel lines of the same address is "0"; cross-line phase of the signal phase of the signal lines opposite and parallel to, the address is "1", so that the induction of the Gray code address information is arranged, whereby determine the position of the pointer on the vernier scale ruler in the longitudinal direction. 2.3 scale ruler technical indicators moving locomotive Address Accuracy: ≤5mm, Resolution: 2 mm, measuring range: any customization; Working temperature: System Operating temperature: -20 ℃ - + 70 ℃, scale ruler Working temperature: without protection sets: -40 ℃ - + 85 ℃, plus fire sets: -40 ℃ -600 ℃, high temperature heat for about 80 seconds; non-contact gap: 150mm ± 50mm (according to need up to 500 mm), left yaw tolerance difference: ± 50mm; Weight: Weight scale ruler: 1.5Kg / m, Dimensions: 100mm × 10mm × length; vernier pointer Weight: ≤2.5Kg, Dimensions: 400mm × 400mm × 30mm (special can be customized); communication error rate: <10-7; refresh rate: 20HZ; adaptation speed: ≤350M / min; standard signal output: RS232 / RS485, scalable other signals; signal transmission distance: ≤1200 m (485 signal output); scale ruler and vernier pointer Protection class: Ordinary IP67, the highest IP69 (underwater work); Input Power: 220VAC ± 10%; power: ground electrical cabinet <100w board electrical cabinet <100w. 2.4 scale ruler scale features in the system to generate instrument (and function signal generator) address of the carrier signal emitted by a certain period, the vernier scale ruler pointer transmitted to the ground station scale analyzer receives the signal, decode restore the locomotive located at absolute address scale ruler, after processing the output from the controller RS232 or RS485. Wear-free non-contact position sensing, long life; can be intermittent or continuous testing, ranging up to 2 km, the length of the displacement detection can be customized; resistant to pollution super capacity, available water, Steam, resistance pH; easy to install and replace (without changing the environment of the scene), maintenance-free; high stability, high reliability, multi-signal output mode selection; with reverse polarity protection, anti-lightning, anti-RF interference, anti-static ; no displacement of the absolute output reference point, not afraid brownout; sampling and measuring the length of time the location does not matter; can be used in circular motion mechanical position detection. Scale ruler can be buried in the concrete floor, easy installation and protection, without affecting the working environment. 2.5 scale ruler single set of equipment diagram (one-dimensional vehicle detection) 1) automotive subsystems: the vernier pointer, automotive electrical cabinet (containing scale analyzer, switching power supply, etc.). 2) ground subsystems: the ground electrical cabinets (containing scale generation device, switching power supplies, gateways, rulers lead converters, etc.). 3) scale ruler subsystems: the special scale ruler, CN box, EN boxes, cables and a variety of ordinary ruler for scale installation, fixed, protection agencies. Chapter 5, system implementation features driving carts Traveling position detection; driving the car Traveling position detection; combined spreader height detection, three-dimensional data acquisition to achieve traffic management; prevent the occurrence of skew traffic collisions, two road accidents take away; according to the real-time location, driving record handling process; remote monitoring, online tracking, logistics state record in the library; interference from the environment, can improve efficiency; combining ERP, MES system, driving position tracking system (CLTS), improve Siku (slab yard, coil library, finished products, raw material warehouse) information management. Chapter 6 System main application areas for bulk materials handling, such as mining systems, metallurgy systems, port systems, chemical systems, power systems, cement systems, railroad systems, light systems, military systems, petroleum systems, mechanical systems, etc. Rail transportation equipment precise positioning and automatic control, such as: lifting, transport, handling and installation personnel carriers metallurgy, coal, electricity and other sectors in a variety of materials and other operations. Such as: driving position tracking systems, crane positioning and intelligent navigation systems, crane positioning and navigation systems, crane positioning Reservoir management control systems, scale ruler driving displacement recognition system, slab yard crane positioning systems, crane positioning coil library systems, finished products crane positioning systems, raw material warehouse crane positioning systems, traffic collision avoidance system, traffic logistics management system