The multi-load sensor group scale system is widely used in industrial production and materials
Precisely measure and record objects in fields such as flow transportation and commercial trade
To achieve automated and intelligent control, detection and fault prediction of the weight
According to the design requirements, the load cell will be installed on the load-bearing device
Relevant parts [1]. The load cell is connected to the weighing instrument through a junction box
The function of the junction box is, on the one hand, to act as a "connection wire" for weighing
The output signals of the sensors are "aggregated" and then provided to the instrument and the other party
The surface can compensate for and correct the deviation of the four corners [2]. In practical applications, use
The Angle difference of the multi-load cell group scale system not only increases when the junction box is adjusted
It not only affects labor and production costs but may also impact customer satisfaction. Because of
Here, explore the influencing factors and exemptions of the angular difference in the multi-load sensor group scale system
The solution to the Angle difference adjustment has become an urgent issue that enterprises need to address
Problem. Calculation of output signals for a scale system with multiple load cells
The output signal calculation of the multi-load cell junction box involves multiple aspects
Signal aggregation and processing of load cells. In practical applications, "jian
Due to its convenience and efficiency, most load cell systems adopt
It is a parallel connection method. Under this connection method, each part is weighed and transmitted
The sensor generates corresponding electrical signal output according to the changes in pressure or weight it is subjected to
Output [3], summarize them together in the junction box for collection and processing, and then output one
A total signal. When multiple load cells are used in parallel, under the rated output of each load cell, the multi-load cell group scale system can be simplified as shown in the figure
The rated output of the load cell (the variation of the output signal versus the input weight)
The ratio between the changes in quantity and the output impedance (output of the load cell)
The ratio of the resistance value at the end, that is, the output sensitivity of the load cell
It should be as consistent as possible to ensure that each load cell matches the total weight
The contribution of quantity is proportional. Better elimination of angular differences leads to improvement
The accuracy and stability of the overall system. In a multi-load cell system, when conducting angular difference tests, first
Ensure that all load cells are correctly installed and in the best working condition
State. Under no-load conditions, perform zero-point calibration on the carrier to ensure accuracy
Keep the initial reading at zero. Subsequently, place the standard weights on the carrier
At multiple key locations, including the junctions and corners of the load cells
To simulate the force distribution in actual use. By monitoring and recording this
Take the instrument readings at these positions and compare the differences in the readings at each point. If any are found
The reading at a certain position has a significant deviation from that at other positions, which may indicate
There is an angular difference issue, which requires further adjustment or calibration. In practical applications, in order to reduce production costs, enterprises are generating
When manufacturing load cells, theoretically, they can be identified by strictly controlling the output of the load cells
Two key factors affecting the angular difference performance of the system. Research shows that, through
Ensure the consistency of the output sensitivity of the load cell and the weighing transmission
The symmetry of the resistance on both sides of the sensor bridge circuit can significantly reduce the Angle
Poor, achieving high-accuracy grade group scale measurement.