Author: Smartweigh–Multihead Weigher
Clear the way, open the wiring terminal, remove the wiring of the sensor one by one, respectively measure the input resistance and output resistance of the sensor (generally the input resistance is about 380Ω, the output resistance is about 350Ω), beyond this range, you can distinguish The sensor is broken. Cleaning methods, one is to have sufficient length, the other is to have a smooth ground, the third is to have a convenient drainage pipe, and the fourth is to have sufficient overall width. Clean and keep it clean, and at the same time check whether there is any dirt in the gap of the weighing platform, whether the gap of the limit switch is valid, whether the wiring is loose or broken, whether the grounding device is firm, and whether the supporting components are in good condition. Open the rear cover on the weighing platform and estimate whether the limit switch is stuck. If the limit switch is stuck, use a crowbar to shake the weighing platform until the gap meets the regulations (3~5mm).
Clear the way, open the connection terminal, respectively measure the input resistance value and output resistance value of the sensor to see if they are within the required range. The method is to add a certain amount of standard weight and 10 small standard weights of 0.Id on the load-bearing device, and then take out the additional standard weights one after another until the number shows that the value has indeed decreased by a specific point. At this time, it is just the zero point, and then put in the standard weight of 0.Id, so that the digital display reaches the reference point for the discrimination test, that is, a flicker point. It’s just a statistical analysis of the information when the car is in battle. 3. Case analysis 3. The 130t electronic truck scale is connected to the power supply and there is no display information. First check the fuse tube and find that the fuse tube is intact. Continue to look at the power plug of the sensor. The power plug is in good condition. Yes, and then tried the PCBI board with a simulator, and found that the dashboard was clear when using the simulator, which can tell that the dashboard is not good.
3.2 The difference between the measurement verification data and the actual data is too large. When the scale is empty, set the display screen to 0, and the body weight is about 70kg. 3kg, it can be analyzed and judged that the sensor is damaged. There are two relatively common calculation methods in Type 2A appraisal. The large and medium-sized electronic truck scale system software includes electronic platform scales and track scales, etc. It is composed of a primary instrument panel weighing sensor, a secondary instrument panel weighing display and an outdoor scale body. The weighing platform is generally They are all installed outdoors. There may be tall buildings or high-voltage wires in the surrounding environment. The situation on the spot is uncertain and full of interference signals. They are often attacked by lightning, which affects the safety of metrological verification. Strict business license safety specifications for installation and design, carry out necessary protective grounding and take shielding measures to ensure the normal operation of the system, and the measurement range is accurate and reliable. 3.3 The instrument panel cannot be reset and changes constantly. Check the weighing platform, and find that the weighing platform is shaking easily, and remove the limit switch and dirt.
Check the terminals and find that when the scale is empty, if the terminals are vibrated moderately, the value will change, and it is checked that the terminals are loose. 4. Conclusion According to the left and right discrimination and analysis, the fault detection method can be calculated. The fault detection should be cleared one by one from the simple to the complicated. SCS installed and conditioned in 2007—120t electronic truck scale, weightless scale, it has the characteristics of convenient measurement and verification, high level of automation, convenient operation, and durability. It can carry out totals, daily reports, monthly reports, annual reports, large-screen display and copying and is connected to a microcomputer The network is equipped with a weighing intelligent management system and the main parameters are properly set. The electronic truck scale system software checks the weighing data information accurately and operates.
1. Structural composition SCS series electronic truck scales are mainly composed of load bearings, weighing digital display instruments, weighing sensors, connectors, limit switch devices and terminal blocks. The weightlessness scale is equipped with copiers and large-screen displays. Peripheral equipment such as electronic computers and adjustable regulated power supplies. 5 According to the principle of 1.1, when a heavy truck enters the weighing platform, under the action of the object, the polyurethane elastomer of the weighing sensor is deformed, and the characteristic impedance of the strain gauge bridge attached to the polyurethane elastomer is unbalanced, and the output The signal proportional to the weight value is processed by the sensor internal amplifier, A/D converter, microcontroller and other electronic components to output an analog signal. The analog signal of each sensor enters the weighing digital display instrument through the terminal to directly display the weight and other data information, connect the digital display instrument to the computer and printer, and the instrument panel can output the weight data signal to the computer and other equipment at the same time. Intelligent weighing management system.
1.2 Digital sensor characteristics It uses internal amplifiers, A/D converters, microcontrollers, input and output sockets, program memory and other electronic components and corresponding data processing technology, wheel weight, temperature drift, stress Relaxation, discrete systems, etc. have a very good compensation function, and output analog signals directly, which improves the anti-interference ability. The casing is made of stainless steel plate with a fully enclosed structure, which is moisture-proof and corrosion-resistant. It is best not to point to the window and place the equipment in the weighbridge room about 1 meter away from the column wall. At present, a wireless broadband video application system is also beginning to involve the development trend of the industrial Internet. The left and right information comes from the Internet. The wrong information on this website is true, accurate, and reasonable and legal. If your legal rights are violated, delete it Please click on the post→1. It is marked on this website“Manuscript source: original design of this website”all works of .
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