Weighing module weighing principle

Weighing module weighing principle

With the advancement of technology and research and development, electronic scales composed of weighing sensors have been widely used in various industries, achieving fast and accurate weighing of materials and their different working principles.

1、 Weighing sensor:
A weighing sensor is actually a device that converts a mass signal into a measurable electrical signal output. The weighing sensor mainly consists of four parts: sensitive element, conversion element, measuring element, and auxiliary power supply:

1. Sensitive components are used to directly sense the weight of the object being measured and output other quantities related to its mass;
2. Transform components are used to convert the output of sensitive components into a measurable signal;
3. The measuring element is used to convert the easily measurable signal output by the transformation element into an electrical signal;
4. The auxiliary power supply is used to provide energy source for the output electrical signal of the measuring element;

When using sensors, the actual working environment in which the sensor is located should be considered first, which is crucial for the correct selection of weighing sensors. It is related to whether the sensor can work normally, its safety and service life, and even the reliability and safety of the entire weighing apparatus. There are qualitative differences between the new and old national standards in the basic concepts and evaluation methods of the main technical indicators of weighing sensors. There are several styles available, including S-shaped, cantilever, spoke, plate ring, film box, bridge, and cylindrical.

As a typical sensor, the weighing sensor is a device that converts mass signals into measurable electrical signals for output. Weighing sensors can be divided into:
There are 8 categories including photoelectric, electromagnetic, hydraulic, capacitive, magnetic pole transformation, vibration, gyroscope ritual, and resistance strain, among which resistance strain is the most widely used.
The weighing sensor adopts a metal resistance strain gauge to form a measurement bridge, which utilizes the principle that the metal resistance wire elongates and becomes thinner under tension, and the resistance increases, that is, the effect of the metal resistance changing with the strain (strain, which is the change in size).

A weighing sensor is based on the principle that an elastic body (elastic element, sensitive beam) undergoes elastic deformation under external force, causing the resistance strain gauge (conversion element) attached to its surface to also deform. After the resistance strain gauge deforms, its resistance value will change (increase or decrease), and then the corresponding measurement circuit will convert this resistance change into an electrical signal (voltage or current), thus completing the process of converting external force into an electrical signal.

2、 Weighing module:

The weighing module is a new type of sensor application structure. It not only ensures the high precision and long-term stability of the shear beam sensor, but also solves the problem of weighing errors caused by improper installation. It is a practical structural accessory for sensors. It consists of a top plate, a base plate, a weighing sensor, a load support column, and supporting bolts. According to the different load bearing columns and top plates, there are three types of structures: fixed, semi floating, and floating. In a weighing system, one fixed module, one semi floating module, and the rest are supplemented by floating modules, generally divided into three sets and four sets. A set of three is used for three-point support, and a set of four is used for four point support. The weighing module can be easily installed on containers of various shapes and is suitable for retrofitting existing equipment, whether it is containers, hoppers, or reaction vessels. With the addition of the weighing module, it can be transformed into a weighing system.

The weighing module is sometimes referred to as a weighing sensor, and sometimes the weighing sensor is also called a "transmitter". It should all belong to analog control, which causes changes in the resistance of the strain gauge through external pressure changes, and outputs current or voltage. Of course, this is just one type of weighing sensor. The types of sensors include photoelectric, hydraulic, electromagnetic, capacitive, magnetic pole changing, vibration, gyro ritual, resistance strain, etc. However, the weighing sensor products currently used in practice all adopt modular design, which is safe and convenient. The modules are installed, calibrated, and the weighing system is automated through fixed, semi floating, and fully floating methods to achieve automatic control.

Weighing module weighing principle:
Taking a typical chemical reaction kettle weighing as an example, three pressure sensors installed at the bottom of the reactor transmit the weight signal of the kettle body to the junction box. Parallel signals from various weighing modules are connected in the junction box, and the angle difference can be adjusted according to the load situation of each weighing module. The collected weight signals are sent to the weighing end or weight transmitter. The weighing terminal or weight transmitter processes the weight signal into corresponding weight data.

⑵ Weighing module is a new type of weighing element that combines weighing sensors, load transmission devices, and installation connectors. It can be easily connected to various shapes of mechanical devices, such as raceways, platforms, vertical tanks, trough tanks, hoppers, etc.

The system equipped with a weighing module can ensure the high accuracy and long-term stability of the weighing sensor, while also solving the weighing errors caused by improper installation. Equipment using weighing modules can usually achieve higher measurement accuracy.