Complete collection of detailed information of weighbridge

Weighbridge, English for truck scales, also known as truck scale, is a large scale set on the ground, which is usually used to weigh the tonnage of trucks. It is the main weighing equipment for measuring bulk goods in factories, mines and businesses.

Weighbridges can be divided into: I-beam weighbridge, T-beam weighbridge, L-beam weighbridge, U-beam weighbridge, channel steel weighbridge and reinforced concrete weighbridge. According to the type of sensor, it can be divided into digital weighbridge and analog weighbridge.

Basic introduction Chinese name: truck scale, weighbridge mbth: truck scale? Common classification: Interpretation of analog and digital weighbridges: overview, development, classification, standard configuration, brief description, force transmission mechanism, sensor, weighing instrument, accessories, structural performance, expression method, weighbridge characteristics, digitalization, intelligence, calibration technology, steel-concrete weighbridge, advantages, development prospect, general application and automobile application. Basic suggestions, matters needing attention, advantages and disadvantages, weighbridge price, weighbridge software and weighbridge overview The common weighbridge developed before 1980s is generally a mechanical weighbridge which is purely mechanically constructed by using the lever principle, also known as mechanical weighbridge. In the mid-1980s, with the maturity of high-precision weighing sensor technology, more and more weighbridge brands entered the China market. With the development of weighbridge industry, people are more and more familiar with weighbridge. Mechanical weighbridges are gradually replaced by analog weighbridges and digital weighbridges with high precision, good stability and convenient operation. Digital electronic weighbridge classification Weighbridge can be divided into analog weighbridge and digital weighbridge according to the sensor output signal classification; According to the structure of the scale, it can be divided into: I-beam scale, T-beam scale, L-beam scale, U-beam scale, channel steel scale and reinforced concrete scale; According to the weighing method, it is divided into static truck scale and dynamic weighbridge; According to the installation method, it can be divided into ground scale and ground scale; According to the scale structure, it is divided into steel structure mesa and concrete mesa; According to the use environment, it can be divided into explosion-proof ground scale and non-explosion-proof ground scale; According to the automation degree of the ground scale, it can be divided into non-automatic ground scale and automatic ground scale. With the continuous improvement of enterprise management level, unattended automatic track scale is becoming the development direction of future track scale. The standard configuration mainly consists of three main parts: load-bearing transmission mechanism (scale body), high-precision weighing sensor and weighing display instrument, so as to complete the basic weighing function of the weighbridge, and select printers, large-screen displays and weighing management software according to the requirements of different users to meet the higher-level data management and transmission requirements. The force transmission mechanism transfers the weight of the object to the mechanical platform of the weighing sensor, which has two types: all-steel structure and steel-concrete structure. Sensor weighing sensor is the core component of the weighbridge, which plays the role of converting the weight value into the corresponding measurable electrical signal. The quality of the sensor is directly related to the quality of the whole weighbridge. Weighbridge bridge sensor weighing instrument weighing instrument, also known as weighing display and weighing display controller, is used to measure the electrical signals transmitted by sensors, and then display the weight readings through special software, and further transmit the data to printers, large-screen displays and computer management systems. Attachment printer: large-screen display for printing weight data table: used for displaying weight data remotely and enlarging it. Weighing management software: used for further processing, storage and transmission of weight data. The weighbridge weighing management system consists of weighbridge software, computer, printer and data line instrument. 1) The printer is connected to the computer and the driver is installed. 2) A data cable is needed between the instrument and the computer. 3) If a large LED screen is installed in the cowshed at the same time, a public line needs to be made to connect the computer and the large screen at the same time. Weighbridges of different companies emphasize different parameters and emphases, but they are roughly the same. Structural performance is an indispensable part of the scale-the scale platform. The selected materials and properties will directly affect the life of the weighbridge. What kind of scale is suitable for your own use? This problem has become one of the key factors in purchasing truck scales. Take the structural classification and performance of weighbridges as an example for analysis: weighbridges can be divided into I-beam weighbridges, T-beam weighbridges, U-beam weighbridges, channel steel weighbridges and reinforced concrete weighbridges (commonly known as cement weighbridges). I-beam weighbridge: I-beam is a kind of strip steel with I-shaped cross section, which has strong compressive and bearing capacity and is not easy to fail, so it is the best choice. However, I-beam floor scales are the most expensive because they use the most materials. T-beam weighbridge: it is a new type of weighbridge structure in the industry, which combines the advantages of channel steel and I-beam. The weighbridge is equipped with transverse ribs, the height of which is adjusted according to the tonnage, and the bottom is sealed with steel plates. Weighbridge panels and girders form a solid box. The scale body can bear high-strength force and the panel is not easy to break. The strength of the scale is better than that of the U-shaped steel structure. Under the condition of ensuring weighing intensity, the use of raw materials is reduced, and the cost performance is the highest. According to the bridge principle, the bottom of the U-shaped steel scale is supported, with strong lateral resistance and winding resistance. The bottom of U-shaped steel is designed according to the bridge structure. There are two supporting beams at the bottom of the channel steel scale, and a sealing plate at the bottom can play the role of tension. The channel steel scale is put together with the steel plate, and the middle is empty, so the supporting performance is poor. L-beam scale has all the advantages of U-beam. At the same time, the connection part is formed by the cooperation of the lengthened bearing beam and the integral steel plate, so that the surfaces of the connection part are connected into a whole and the pressure is shared. The load-bearing beam ensures the bearing capacity and will not bend after long-term use, so it is suitable for practical use in the joint of super-large scale body. Representation method Electronic weighbridges are usually represented by: SCS-×××, where: the first S stands for ground weighbridge; C: stands for force transmission structure-sensor; The second s stands for digital display; The following "×××" represents the maximum range. For example, SCS-80 is an electronic weighbridge with a maximum range of 80 tons. Some manufacturers also use their own brand name "×××××". But basically seeing SCS and numbers, we can roughly judge whether it is an electronic truck scale and what is the maximum range. The characteristics of the weighbridge The digital weighbridge solves the problem of weak transmission signals and interference-digital communication ① The maximum output signal of analog sensors is generally tens of millivolts, which is easily disturbed during the cable transmission of these weak signals, resulting in unstable system operation or reduced measurement accuracy. The output signals of digital sensors are all around 3-4V, and their anti-interference ability is several hundred times greater than that of analog signals, which solves the problems of weak transmission signals and interference. ② RS485 bus technology is adopted to realize long-distance signal transmission, and the transmission distance is not less than1000 m; ③ The bus structure is convenient for the application of multiple load cells, and the same system can connect up to 32 load cells. Intelligent digital weighbridge solves the problems of unbalanced load temperature influence and aging creep-intelligent technology ① changes the size of weighing signal through simple circuit to prevent cheating; ② Digital weighbridge can automatically compensate and adjust the influence caused by unbalanced load and temperature change. Good consistency and interchangeability. After multiple sensors are connected in parallel to form a scale, linearity, calibration and performance compensation can be realized by software methods, which reduces the system error and simplifies the field installation, debugging, calibration and adjustment of the scale body. ③ Automatic fault diagnosis and error message code prompt function; (4) When the load is applied to the load cell for a long time, its output often changes greatly. Digital weighing sensor automatically compensates for creep calibration technology through software in internal microprocessor. Digital weighbridge doesn't need weighing display instrument, which reduces the failure rate of weighbridge-digital calibration technology (1) can automatically calibrate the unbalanced load (four corners) of weighing instrument at one time; ② The range coefficient and zero value of the weighing instrument can be modified as needed to make the coefficient and zero parameter of each sensor consistent. ③ The digital weighbridge can be directly connected to the computer to display the weighing process, which reduces the link of weighing failure. The current computer hardware is extremely reliable, so the weighing system composed of it is safer and more reliable. The simulated weighbridge consists of a steel structure modular weighing platform, a high-precision bridge resistance strain simulation sensor, a static weighing control display instrument and a sealed waterproof junction box. The difference between reinforced concrete weighbridge and all-ground weighbridge, digital weighbridge and analog weighbridge is also called cement weighbridge. The biggest difference between reinforced concrete weighbridge and all-ground weighbridge is that the former is reinforced concrete structure and the latter is all-steel structure. These weighbridges (commonly known as truck weighbridges) use basically the same instruments, junction boxes and printer sensors. The composition features of cement weighbridge are: the outer frame is made of professional profiles, and the inner part is made of double ribs, and the service life of connecting wires is more than 20 years. Please read the product cement weighbridge for specific parameters and construction technology. Cement weighbridge | Reinforced concrete weighbridge is different from full weighbridge, digital weighbridge and analog weighbridge. The former is reinforced concrete structure, while the latter is all-steel structure. The instruments, junction boxes and printer sensors used in these weighbridges are basically the same, and their working principles and lightning protection facilities are also basically the same. The structure of the weighbridge foundation is the same, and there is no essential difference in function. However, the production cycle of cement scale is much longer than that of all-steel structure, so if you want to use cement scale as a weighbridge, you'd better negotiate with the manufacturer as soon as possible to avoid delaying the time when the weighbridge is put into use. Advantages: the use accuracy is reduced, and the service life is shortened. It has the advantages of corrosion resistance, stable structure, self-weight, accurate positioning, no deformation and maintenance-free. Suitable for public weighing stations, chemical enterprises, ports and docks, refrigeration industry and other industries with high requirements for anti-corrosion function. Lightning protection of 1: Thunderstorm weather often causes steel truck scales to be struck by lightning, causing unnecessary damage to electronic components, while the concrete platform is non-conductive, which can help customers reduce the damage of lightning to sensors, weighing displays and junction boxes. 2. Strong corrosion resistance: concrete can resist chemical corrosion, especially in places with chemical corrosion, especially in coastal wet areas. Rust-proof and maintenance-free: concrete is moisture-proof and oxidation-resistant. Unlike steel scales, concrete scales rust and do not need to be painted and maintained every year. 4 Long service life: one top and three. Concrete has high strength, good rigidity, wear resistance, pressure resistance, acid resistance and alkali resistance, and its general service life is 60 to 70 years, while the service life of steel platform is only 20 to 20 years, so it is more than three times that of steel platform. Good quality stability: self-weight, no inclination, accurate positioning (small swing), no deformation, good accuracy and stability. Convenient lifting: modular production, convenient and free lifting. High recycling value: high cost performance, quality and function far exceed that of iron pound, but the price is equivalent to that of iron pound. Cement pounds that have been used normally for 30 years can be sold at half price when bought back, and will always be products. International trend: cement electronic weighbridge has been very popular abroad and has entered the stage of popularization and use, which can make up for the defects of all-steel weighbridge, and it is an inevitable trend to replace steel weighbridge. Development prospect: Digital weighbridges are often used to solve the problems of weak transmission signals and interference-digital communication: ① analog sensors cause system instability or reduce measurement accuracy. The output signals of digital sensors are all around 3-4V, and their anti-interference ability is several hundred times greater than that of analog signals. ② RS485 bus technology is adopted to realize long-distance signal transmission, and the transmission distance is not less than 2000m. Using digital electronic truck scale to solve the problems of unbalanced load temperature and aging creep-intelligent technology: ① changing the size of weighing signal with simple circuit to prevent cheating; ② Digital electronic truck scale can automatically compensate and adjust the influence caused by unbalanced load and temperature change. Good consistency and interchangeability. After multiple sensors are connected in parallel to form a scale, linearity, calibration and performance compensation can be realized by software, which reduces the system error and simplifies the field installation, debugging, calibration and adjustment of the scale. ③ Automatic fault diagnosis and error message code prompt function; ④ When the load is applied to the load cell for a long time, its output often changes greatly. The digital weighing sensor automatically compensates for creep through the software in the internal microprocessor. Energy-saving requirements The national policy is that the designed weighbridge products should conform to the national key energy-saving policies. For example, according to the energy-saving requirements of the country's largest strategic emerging industry, the power industry should combine "smart grid" with reducing GDP energy consumption and large-scale desulfurization transformation, and the building materials and metallurgical industries should meet the development requirements of energy conservation. In product design and development, the weighbridge industry should continue to develop new products with high efficiency, energy saving, advanced environmental protection and resource recycling. Secondly, the design of weighbridge should adopt energy-saving components. For example, solar instruments can be used to connect weighbridges, which not only reduces the loss of lead-acid batteries, but also saves electricity and energy. According to relevant data, the use of solar energy meters not only saves energy, but also helps to prolong the service life, killing two birds with one stone. Using energy-saving and synergistic materials in the design of weighbridge to improve the cost performance of products is to consider reasonable material saving on the premise of meeting functional requirements. For example, simple mechanism design with optimized design can also achieve the required functions, instead of complex mechanism design; An example of reducing manufacturing cost by optimizing process measures: in HMI, the TFT screen is changed into a low-power LED screen, and the power consumption can be reduced by at least 50% by using the dormant mode of HMI products. Suggested site selection of the weighbridge foundation: the installation position of the electronic weighbridge should have a good drainage channel, and the installation position should not be lower than the surrounding area, otherwise it will cause water accumulation, flood the weighbridge and damage the sensor due to low terrain and rain. For shallow foundation pits, drainage channels should be set up. In addition, there must be enough straights at both ends for cars to get on and off, and the straights at both ends should be at least equal to the length of the platform. Precautions: The concrete foundation must be poured and excavated below the local frozen soil line. During the construction, the concrete label shall be ensured, and the dimensions such as levelness and position shall be ensured when pouring embedded parts, and the embedded parts shall not be displaced when pouring concrete. After the foundation pouring is completed, it shall be maintained according to the civil code, and the weighbridge can be installed only after the concrete reaches the design strength index. If the maintenance period is to be shortened, measures such as adding "early strength agent" are allowed under the guidance of professional and technical personnel during construction. For lightning protection, grounding piles should be set according to local conditions, and the grounding resistance should be ensured.