Working Principle of Portable Truck Scales

The working principle of Portable Truck Scales is:

When weight is applied to the axle scale platform, the load cell on the axle scale platform releases a voltage signal, and the output signal is proportional to the scale weight. The signal is transmitted to an amplifier for amplification, and then converted into a digital signal through an analog-to-digital converter for display on a monitor. The main function of a portable truck weight scale is to weigh the weight of each wheel on the weighing platform when the vehicle is dynamically passing or stationary on a certain width, and then calculate the accumulated weight of the axle and total weight. Calculate the wheel weight of the car using a axle Pad, and the axle weight using two axle Pads. According to the axle type of the vehicle, the total weight of the vehicle can be accumulated. The overload process is a complex real-time process that requires sensors to quickly collect the axle weight of the vehicle and calculate the total weight.

Portable truck weight scale are widely used in highway transportation load control, highway law enforcement inspections, automotive safety performance testing, urban waste disposal, and more. The development of axle load is very convenient for municipal and security departments to carry. Nowadays, portable truck weight scale are gradually being adopted in various industries because they are convenient, lightweight, and easy to carry;

Portable truck weight scale consists of two thin axle scale platforms, two sets of four approach bridges, and a weighing indicator display. The weighing platform is made of high-strength aluminum alloy material, which is simple and durable, with good protection system performance. It has multiple weighing ranges and high resolution, and can be used for dynamic and static management and effective weighing of vehicles of different types in enterprises.

 

There are currently two popular structures for truck axle scales:

There are two types of load cell used for truck axle scales load cells, namely embedded structural sensors and integrated structural sensors. Currently, embedded structural sensors are more popular in the market. Embedded structure sensors have advantages such as higher pressure resistance and higher accuracy compared to previous integrated load cells.

How to use the truck axle scales correctly:

The truck axle scales adopts high-precision sensors. After years of user experience, Ningbo Saintbond has concluded that the product is at the forefront of comparison in terms of accuracy, stability, water quality, and repeatability, and has become a trusted unit in terms of reputation and quality. The effective size of the weighing platform is available in multiple options; The weighing pads platform is made of materials, lightweight, and comes with a built-in approach bridge; Therefore, the system is easy to carry, transport, and install. At the same time, the system adopts a Chinese menu operation, and the instrument has improved functions such as display, setting, correction, operation, printing, and communication, making it simple and clear to use.

Precautions for using a portable vehicle scales:

1:Load Cells and portable vehicle scales must be reliably connected and kept away from strong electric and magnetic fields. Sensors and portable car weighing devices should be kept away from highly corrosive objects and flammable and explosive materials.

2:Do not use in environments with flammable gases or vapors.

3:In areas with frequent lightning strikes, reliable lightning arresters must be installed to ensure the personal safety of operators and prevent lightning strikes from damaging portable car weighing instruments and corresponding equipment.

4:Load Cells and portable vehicle scales are both electrostatic sensitive devices, and anti-static measures must be taken during use. Welding or other strong electric field operations are strictly prohibited on the weighing platform; During thunderstorm season, reliable lightning protection measures must be implemented to prevent damage to load cells and mobile weighbridge caused by lightning strikes, ensuring the personal safety of operators and the safe operation of mobile weighbridge and related devices.

5:Before connecting portable weighbridge to external devices, the power supply of the portable car weighing instrument and corresponding equipment must be cut off first! Before plugging or unplugging the load cell connection wire, the power supply of the portable weighbridge must be cut off (turned off) first! Before plugging or unplugging the communication connection, the power supply of the portable car weighing instrument and the upper computer must be cut off first!

6:Do not park vehicles or pile up debris on weighbridge truck scale load platform, and do not allow dirty vehicles to be directly inspected. First, clean and wait for less dripping water for inspection;

7:Vehicles exceeding the rated load are prohibited from driving on axle weigh pads;

8:The Axle Weighing Pads is a precise electronic product, and it must be used to remove water from the vehicle during rainy weather. It can only be detected when there is less water dripping and cannot be directly placed on a road surface with water;

9:When water enters the production ban Axle Weighing Pads, keep the sensor dry to ensure its normal operation;

10:When the vehicle enters the Axle Weighing Pads platform, it must not be driven too fast to prevent the impact force from damaging the platform;

Several common self inspection methods for Portable Truck Scales, axle scale, and air weigh truck scale:

1: Exclusion method

The so-called elimination method is a method of determining the cause of faults by plugging and unplugging some plug-in boards and components inside the machine. When the instrument returns to normal after removing a certain plug-in board or component, it indicates that the fault occurred there.

2: Comparison method

Two axle weighing instruments of the same model are required, and one of them is operating normally. To use this method, it is necessary to have the necessary equipment, such as a multimeter, oscilloscope, etc. According to the nature of comparison, there are voltage comparison, waveform comparison, static resistance comparison, output result comparison, current comparison, etc.

The specific method is to operate the faulty instrument and the normal instrument under the same conditions, and then detect the signals of some points and compare the two sets of signals measured. If there are differences, it can be concluded that the fault lies here. This method requires maintenance personnel to have considerable knowledge and skills.

3: Tapping hand pressure method

It is common to encounter the phenomenon of axle weighing instruments running intermittently, which is mostly caused by poor contact or virtual soldering. For this situation, tapping and hand pressure methods can be used. The so-called tapping refers to gently tapping the plug-in board or component with a small rubber mallet or other tapping object on the possible faulty part to see if it will cause axle weighing errors or shutdown faults. The so-called hand pressure refers to the process of turning off the power and firmly pressing the inserted components, plugs, and sockets with your hand when a fault occurs, and then turning on the machine to see if it can eliminate the fault. If it is found that knocking the casing once is normal, and then knocking it again is not normal, first re plug all the connectors and try again. If it is troublesome and unsuccessful, we have to find another way.

Maintenance and upkeep of wheel weigher:

1: The truck axle scales must be cleaned after use, and any dirt on the table and in the gaps must be disposed of;

2: Check if the upper surface of the truck axle scales platform is in its normal position after the impact of the vehicle. The normal position of the upper surface refers to the weighing area of the truck axle scales platform;

The above are some precautions for using portable car scales. During use, the operating procedures should be standardized to prevent accidents and unnecessary losses from the source!