(1) Choose a foundation ballast structure, add early strength agent to high-grade concrete, and the road closure time is less than 7 days. (2) Choose wide concrete pillow plate structure and install it after opening to traffic for several hours. (3) Fastener construction method: open to traffic while constructing. Three. Technical performance 1. Measurement method: bidirectional automatic dynamic measurement. 2. Metering speed: 3 ~ 40km/h, without metering the traffic speed. 3. Measurement accuracy: GCU type conforms to the provisions of JJG234— 90 Verification Regulation of Dynamic Weighing Track Scale issued by the state. (1) accuracy grade and division value
Accuracy grade division value e
0.2 50 kg
0.5 100 kg
2) Static verification tolerance
Weighing m tolerance
m = 0 0.5e
0 & ltm≤500 e 1.0e
500e & ltm≤2000 e 2.0e
3) Dynamic verification tolerance
Weighing m tolerance
0.2 0.5
m = 0 0.5e
0 & ltm≤500 e±2.0e
500e & ltm≤2000 e 3.0e 4.0e
4. Sensitivity: increase or decrease the weight by 20kg, and the change exceeds 10kg. 5. Output mode: CRT displays serial number, car number, vehicle speed, gross weight, tare weight, net weight, ticket weight, profit and loss, accumulation, date, operator and so on in real time, and has the functions of tabulation, inquiry, statistics, long-term storage of measurement results and so on. 6. Power consumption: no more than 500VA7, system self-check, zero-point automatic tracking, and data can be transmitted remotely.
8. Zero drift: the zero drift of the system for 60 minutes should not be greater than1d. 9. Identification mode: fully analog without switch identification, which can automatically detect the vehicle load and judge the over-balanced speed, identify locomotives and special vehicles 10, and can be connected with the automatic vehicle number identification system and TMIS system. With remote transmission function, data can be transmitted through the network 1 1. Operation mode: full Chinese character system display, unattended or manual during measurement. 12, equipped with anti-high voltage grounding system and shielding system, and lightning protection measures have been taken for computer power supply and channel. 13. The scale is insulated from the track circuit, and the whole sensor is shielded in the steel structure. (according to CCITT standard: 10/200US wave, impact amplitude 5KV, residual voltage less than 20V-40V) 14, applicable power supply condition: AC 220v+10 (%)-15%); 50HZ, and the system power consumption is less than 500VA. 15, adapted to ambient temperature and humidity conditions:
The ambient temperature of outdoor equipment is -45℃-+75℃, and the relative humidity is ≤95% 16. It has automatic diagnosis function and measures to prevent the car from being lost. When the equipment fails, it can automatically display the failure situation and save the failure record to the disk, and output it through the printer. 17, the operating software is the network version of Windows track scale software, which not only realizes the weighing and measuring function of track scale, but also makes full use of computer system resources (such as large-capacity hard disk, USB, plug & etc.); Play and so on. ), networking is convenient and fast, which is beneficial to the enjoyment of weighing data. Four. Mechanical weighing structure 1. Structure The mechanical structure consists of weighing beam, frame, lateral limiting device, steel pillow, connecting plate and iron backing plate. The frame and steel sleeper are connected into a whole by high-strength bolts and connecting plates. There is a set of anti-torsion system between the weighing beams to prevent the tracks inside the weighing area and the weighing beams from overturning, and there is a lateral limit system on the weighing beams to limit the lateral movement of the weighing beams. 2. For the installation of the weighing structure, choose a certain straight section, the length of which depends on the measuring speed, generally more than 50 meters, the longer the better. The mechanical part has been installed as a whole before leaving the factory, and the on-site installation is synchronized with the basic treatment. Usually, the installation of curved track scale requires that the slope of the line is flat on the curve with curvature radius greater than 250 m m.3. Eight high-precision sensors are selected for sensor installation, which are respectively installed in place according to the design requirements, and the data acquisition instrument is introduced at the output end. When installing the scale in the factory, install a fixture simulation sensor with the same shape as the sensor. V. Weighing Principle The pressure and shear sensor converts the said vehicle weight into a voltage signal, which is amplified, filtered and A/D converted, and then sent to the computer through the parallel port. The computer completes data acquisition, digital filtering, locomotive discrimination, weight reduction and speed calculation, and carries out high-precision correction and compensation according to the speed. By combining the sensors in the measuring area of the scale, the wheel weight is converted into an electric pressure signal according to a strict linear relationship. At the same time, a high-performance amplifier specially developed abroad for amplifying strain signals is selected, which integrates the input zeroing module, the output zeroing module and the adjustable third-order filter network, and has excellent linearity and extremely low temperature drift. The millivolt signal from the sensor is amplified into a low voltage signal, and then the weight signal enters the computer through A/D conversion. Schematic diagram of GCU continuous track scale VI. Main components of electrical system
1. sensors: 4 pressure sensors; 4 shear sensors; 2. Sensor power supply: The main component of the power supply adopts a three-terminal regulator, and the circuit structure composed of this component is simple.
Single, stable operation with measures such as overheating and short circuit protection, can work continuously for a long time. 3. Data acquisition part: Because the signal output by the sensor is generally weak, many higher harmonics are likely to be superimposed on the signal, so the signal must be amplified and filtered before being sent to the A/D conversion part. Therefore, the selected imported products have the characteristics of low power consumption, low drift, low noise, long-term continuous operation, excellent filtering effect, adjustable signal and complete functions. 4. Analog-to-digital conversion: The imported high-speed 16-bit A/D converter is used for analog-to-digital conversion. Using this device, the measuring resolution of weighing instrument can reach 1 ㎏, and the sampling times per second can reach 30000 times, which ensures the measuring accuracy and weighing speed to a certain extent. 5. Parallel interface circuit: The main component of the parallel interface is the imported device, in which the 16 bit data line composed of the parallel port transmits the digital signal sent by the acquisition system to the computer. 6. Computer system: industrial control machine is adopted, which is suitable for industrial environment with harsh environment and long-term measurement, and has high vibration and dust resistance. 7. Software Features Our company's track scale software consists of weighing, interface and management. The signals input by the data acquisition instrument are processed at high speed in the foreground and background, and the calculation results are transmitted to the management part through the interface. The management department is written in C++, which can automatically print the original weighing records, automatically detect the system zero point and the online status of the printer, and has the functions of full-screen editing, query, statistics, deletion, automatic saving and weighing settings. The management program can store a large number of waveforms circularly and provide a networked database interface. Seven, a complete set of products GCU single table uninterrupted dynamic electronic track scale configuration:
1, a set of mechanical weighing structure
2. Four pressure sensors
3. Four shear sensors
4, a set of data acquisition instrument
5. A set of microcomputer or industrial computer.
6. A printer
7. A purified power supply.
8, computer console chair.
9, a set of special tools
1 1, two fully sealed junction boxes.
12, a set of static weighing software.
13, a set of dynamic weighing software.
14, a set of system management software.
15, a set of mechanical scale assembly drawings.
16, a set of electrical schematic diagram
17, three sets of technical specifications
18, three sets of training materials
19, a set of random data.
20. Three sets of grounding systems
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5.9
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Technical specification (track scale)
GCU series non-stop dynamic track scale
I. Overview
Two-force synthetic continuous track dynamic track scale is a large-scale industrial weighing equipment that can automatically weigh railway freight cars continuously without stopping or unhooking. The patented product of Erli synthetic continuous track scale designed and manufactured by Wuhan Lide Company is suitable for ports, stations, special lines, warehouses, freight yards and other places. It can accurately measure the load on the track through the combination of pressure and shear sensors and the change of weighing speed. Through the intelligent measurement system, data such as speed and weight loss can be calculated, and a series of related work such as peeling, accumulation, long-term data storage, tabulation and printing can be completed. It can not only analyze the load and vehicle condition, but also measure the wheel weight, unbalanced load, overload and other parameters.
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GCU-type single-meter-two-force synthetic non-stop dynamic track scale adopts trolley metering mode, which is suitable for the metering of solid objects such as coal and ore.
GCU-type long-gauge or double-gauge two-force synthetic continuous track dynamic track scale adopts double bogies to measure the whole vehicle synchronously, which is suitable for measuring valuables and liquid objects, such as railway tank cars and ladle.
As a new type of high-speed dynamic measuring equipment, the two-force synthetic non-stop dynamic track scale is evaluated in terms of measuring accuracy, long-term stability, operation reliability, failure rate and effective service life, etc. Based on the above factors, our company takes the following measures: