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发明授权
CN101231187B 一种压电感应式电子称重的测量电路及其装置 有权 转让

一种压电感应式电子称重的测量电路及其装置
摘要：
本发明公开了一种压电感应式电子称重的测量电路及其装置，在测量电路上设有在受到压力作用的情形下输出感应电荷的压电传感器，及降低感应电荷的漏电速度的电荷积分放大电路；电荷积分放大电路与压电传感器连接，用于接收压电传感器输出的感应电荷，并对感应电荷进行放大处理后输出模拟信号至模数转换器；其中，压电传感器为压电陶瓷传感器，并根据压电陶瓷传感器的时间特性，将感应电荷的时间常数设置在105以上。本发明提供的压电感应式电子称重装置，通过在其测量电路上设置一电荷积分放大电路，降低电荷漏电速度，从而实现静态环境下的称重测量，并且无需额外增加元器件，进一步降低了生成成本；同时，该称重装置体积小，便于携带。
摘要（英）：

The invention discloses a piezoelectricity induction type electronic weighting measuring circuit and a device thereof, which is applied to the electronic weighting field, wherein, a piezoelectricity sensor is arranged on the measuring circuit to output an induction electric charge under pressure. The invention is provided with an electric charge integral amplifying circuit which is connected withthe piezoelectricity sensor, and the electric charge integral amplifying circuit is used for receiving the induction electric charge output by the piezoelectricity sensor and outputting analog signals to a module converter after the induction electric charge is amplified. The piezoelectricity induction type electronic weighting device provided by the invention reduces the electric leakage speed of the electric charge by the electric charge integral amplifying circuit which is arranged on the measuring circuit, thereby realizing the weighing measuring under the environment of static state. Besides, additional elements do not need to be added, and the production cost is further reduced. Simultaneously, the electronic weighting device has small volume and the carrying is convenient.

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