Principles and Types of Weighing Sensors in Dalian Weighbridge Remote Control:
Internationally, there are various types of weighbridge weighing sensors, such as resistive strain gauge pressure weighbridge weighing sensors, semiconductor strain gauge pressure weighbridge weighing sensors, piezoresistive pressure weighbridge weighing sensors, inductive pressure weighbridge weighing sensors, capacitive pressure weighbridge weighing sensors, resonant pressure weighbridge weighing sensors, and capacitive weighbridge weighing sensors. However, the most widely used type is the piezoresistive pressure weighbridge weighing sensor due to its extremely low cost, high precision, and good linearity characteristics. Below, we will primarily introduce this type of Dalian weighbridge remote control and weighing sensor.
When understanding piezoresistive force weighbridge weighing sensors, it’s important to first familiarize ourselves with the resistive strain gauge element. A resistive strain gauge is a sensitive device that converts strain changes on the measured object into an electrical signal. It is one of the main components of a piezoresistive strain sensor. Resistive strain gauges come in two primary types: metal resistive strain gauges and semiconductor strain gauges. Metal resistive strain gauges can further be divided into wire-type strain gauges and metal foil strain gauges. Typically, strain gauges are tightly bonded to a mechanical strain base using special adhesives. When the base is subjected to force and stress changes occur, the strain gauge also deforms, causing a change in its resistance, which in turn alters the voltage applied across the resistor. The resistance change produced by the strain gauge under force is usually small; therefore, these strain gauges are typically configured into a strain bridge and amplified through subsequent instrumentation amplifiers before being transmitted to processing circuits (usually A/D conversion and CPU) for display or execution. Therefore, analog weighbridges and digital weighbridges are easiest to control at this stage, leading to the widespread use of products like Dalian weighbridge remote controls, weighbridge decoders, and digital Dalian weighbridge remote controls in industries such as water conservancy, hydropower, railway transportation, intelligent buildings, production automation, aerospace, military, petrochemicals, oil wells, power, shipping, machine tools, pipelines, and more.
Classification of Weighbridges:
Based on the differences in sensors, weighbridges can be divided into two types: digital and analog sensor weighbridges.
Definition of Weighbridge Decoder: A weighbridge remote control is a device that changes the weight during weighing. It has many names such as weighbridge remote control, truck scale decoder, truck scale remote control, electronic scale remote control, electronic scale decoder, electronic weighbridge remote control, and electronic weighbridge decoder. In essence, all these terms refer to the same thing - a device that can alter weighing data. Generally, electronic weighbridges do not have wireless signal reception circuits, so in this sense, they cannot be interfered with, making the term "weighbridge interference device" inaccurate.
Working Principle: To understand how Nantong weighbridge decoders work, one must first understand the principle of operation of weighbridges/electronic truck scales. An electronic truck scale/weighbridge mainly consists of parts such as a load cell, weighing display instrument, weighing sensor (resistive strain gauge), connecting pieces, limit devices, and junction boxes, along with optional external equipment such as printers, large screen displays, computers, and voltage stabilizers. The object to be weighed or a loaded vehicle is placed on the platform of the load cell. Under the influence of gravity, the load cell transmits the force to the weighing sensor, causing deformation in the elastic body of the sensor. The strain gauge bridge attached to the elastic body loses balance and outputs an electrical signal proportional to the weight value. This signal is then amplified by a linear amplifier. Afterward, it undergoes A/D conversion to become a digital signal, which is processed by the microprocessor (CPU) inside the instrument to directly display the weight data. With a printer configured, the system can print records of the weighing data. If connected to a computer, the measurement data can be entered into a computer management system for comprehensive management. Whether it's an electronic scale or an electronic weighbridge, the basic principle is the same: using a sensor (force sensor) to convert the object's weight into an electrical signal, which is then sent to conditioning, A/D conversion, and computational circuits (MCU). Finally, the signal is converted into a digital display.
This explanation covers the fundamental principles and operational mechanisms behind weighbridge remote controls and their associated technologies.