1. Regarding digital load cells
At the end of the last century, digital load cells were all the rage. Almost all major foreign manufacturers launched digital load cells. Especially the column-type load cells can install integrated circuits in the casing and directly output "digital signals" to form a complete "digital load cell". However, most strain load cells cannot integrate integrated circuits with strain cells to form A "complete" "digital load cell", so many manufacturers have launched circuits that convert and control A/D
In the form of a "channel", a so-called "digital sensor" is designed to be connected to the strain load cell.
At the beginning of this century, digital load cells were widely used both at home and abroad, and many articles were published introducing digital load cells
The superiority of sensors and examples of their application. I have also written many articles introducing digital load cells. Three articles were successively published in the "Weighing&Measurement" magazine in the United States, among which "Digital LoadCellsGain Acceptance" is a relatively comprehensive article introducing the digital technology and application of sensors.
The main advantages of strain gauge digital load cells are:
(1) It has enhanced the anti-interference ability of signal output, improved the reliability of signal transmission, and overcome the influence of temperature on long-distance transmission.
(2) It has an independent communication address, which facilitates the query of each sensitive component and enables the modification of each independent signal
Correction, diagnosis and compensation. Earlier analog signal weighing instruments basically used all the sensors of the weighing instrument in parallel, so they could only provide a comprehensive signal. However, each sensor of digital weighing sensors can provide a signal, which greatly increases the amount of information and facilitates the processing of weighing signals and the establishment of mathematical models. (3) Each load cell can establish a unified and accurate nominal sensitivity value, which brings great convenience to the installation, commissioning and replacement of the load cells. (4) It can achieve calibration of weighing instruments without weights. These features represent a qualitative leap in the development of strain gauge load cells. The strain gauge digital load cell mentioned above is not A "true" digital load cell in essence. It is essentially a "digital" strain sensor with an A/D converter, CPU and the ability to be used in conjunction with digital channels installed inside the sensor. A true digital load cell is a sensitive component that can convert force values or strain variables into "frequency signals". Common types of such sensors include vibrating wire sensors, tuning fork sensors and capacitive sensors.
