Piezoresistive force sensor signal amplification module

Abstract

The invention discloses a piezoresistive force sensor signal amplification module, which comprises a power interface, a power conversion circuit, an input interface, a primary amplification circuit, aprimary amplification output bias circuit, a secondary amplification circuit and an output interface, an external power supply is introduced from the power supply interface, and multiple paths of power supplies are output through voltage reduction of the power supply conversion circuit to supply power to circuits and force sensors; the input interface accesses a pair of differential signals output by the force sensor and supplies power to the force sensor; the first-stage amplification circuit amplifies a pair of differential signals accessed to the input interface, the output voltage is increased or decreased through the first-stage amplification output bias circuit, and the differential signals are amplified through the second-stage amplification circuit and then output through the output interface. The module is simple, easy to use, high in universality, high in reliability and capable of supplying power to the force sensor and amplifying signals, the amplification factor and biasvoltage of the module can be adjusted, the force measurement precision is effectively improved through proper adjustment, the module can be directly applied to various devices, and the device development and production cost is greatly saved.

Description

technical field [0001] The invention relates to a piezoresistive force sensor signal amplification module, which belongs to the technical field of force measurement. Background technique [0002] Force measurement technology is widely used in industrial control, safety control, electronic weighing apparatus, medical treatment and other fields. The accuracy and reliability of force measurement have an extremely important impact on the performance of equipment and the personal safety of users. The combination of piezoresistive force sensor, signal amplification module and ADC detection is a kind of force measurement technology, in which the signal amplification module is used as an intermediate device to amplify and transmit the weak voltage signal of the force sensor to the ADC for detection. Linearity, stability, adjustability and other indicators can ensure the overall accuracy and reliability of this force measurement technology. [0003] However, the current signal ampli...

AI Technical Summary

Problems solved by technology

[0003] However, the current signal amplification module cannot flexibly adjust the amplification factor and bias voltage, resulting in limited signal amplification factor and low precision.

Therefore, the existing signal amplification module cannot take into account the amplification adjustment method, adjustable range, and precision, and there are limitations.

Images