The acceleration sensor can not calculate the weight of mass block directly, but can calculate the weight of mass block indirectly by measuring the acceleration of mass block motion.
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According to Newton's second law (F=ma), if a force is applied to an object fixed to a support, it will produce an acceleration equal to and opposite to the force. Therefore, if we can measure the force on the object, we can calculate the acceleration of the object, and thus find the mass of the object and the magnitude of the gravity.
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Specifically, suppose we have a mass block fixed to a bracket, supported by a spring. When the mass block is subjected to gravity or other external forces, the spring will produce a certain deformation, which will drive the internal components of the sensor to corresponding displacement. The circuit inside the sensor can convert this displacement into an electrical signal output, and then further processed by the measurement circuit, the acceleration of the mass block can be obtained.
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By measuring the acceleration of the mass block and substituting Newton's second law formula, the weight of the mass block can be calculated. However, it should be noted that due to the error of the sensor itself and the existence of measurement errors, the calculated mass block weight may have a certain error.
Newton's second law, m=F\/a, can be calculated by reading F and a from the sensor