Gravity detection sensor
A gravity detection and sensor technology, applied in the field of sensors, can solve the problems of not being able to meet high use accuracy, performance cannot be guaranteed, and is not conducive to mass production, etc., to achieve the effect of improving flexibility of use, good energy saving effect, and low power consumption
Pending Publication Date: 2021-09-17
江西万年芯微电子有限公司
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Problems solved by technology
Poor use flexibility, high power consumption, performance cannot be guaranteed, it is not conducive to mass production, and cannot meet the needs of users for high precision
Method used
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[0025] The implementation mode of the present invention is illustrated by specific specific examples below, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this description. Obviously, the described embodiments are a part of the present invention. , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0026] see figure 1 and figure 2 , providing a gravity detection sensor, including a shielding cover 1, the inside of the shielding cover 1 is provided with a metal deformation body 2 and a circuit board 3, and the metal deformation body 2 is pasted with a Wheatstone strain gauge 4 through epoxy AB glue , the Wheatstone strain gauge 4 includes a Wheatstone bridge formed by four resistors;
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The invention relates to a gravity detection sensor. The gravity detection sensor is provided with a shielding case; a metal deformable body and a circuit board are arranged in the shielding case; a Wheatstone strain gauge is attached to the metal deformable body through epoxy AB glue; the Wheatstone strain gauge comprises a Wheatstone bridge formed by four resistors; a first angular point of the Wheatstone bridge is electrically connected with a sensor power supply pin; a second angular point of the Wheatstone bridge is electrically connected with a signal positive pin; a third triangular point of the Wheatstone bridge is electrically connected with a sensor grounding pin; a fourth angular point of the Wheatstone bridge is electrically connected with a signal negative pin; the circuit board is further provided with a channel selector, a preamplifier, an analog-to-digital converter and a digital filter; the signal positive pin and the signal negative pin are electrically connected with the channel selector; the channel selector is electrically connected with the preamplifier; the preamplifier is electrically connected with the analog-to-digital converter; and the analog-to-digital converter is electrically connected with the digital filter. According to the gravity detection sensor of the invention, active, independent and clearance type subsystem high-integration gravity measurement is realized, the energy-saving effect is good, batch production is facilitated, and the precision is high.
Description
technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a gravity detection sensor. Background technique [0002] The gravity detection sensor is realized by the piezoelectric effect. A heavy object inside the sensor and a piezoelectric sheet are integrated together, and the horizontal direction is calculated by the magnitude of the voltage generated in the two orthogonal directions. The piezoelectric effect is that the external force applied to the crystal of a heteropolar crystal without a symmetry center will not only deform the crystal, but also change the polarization state of the crystal, and establish an electric field inside the crystal. The phenomenon of polarization is called positive piezoelectric effect. It is mainly used in intelligent switching between horizontal and vertical screens of mobile phones; the direction of taking photos; gravity-sensing games, such as balance balls, racing games, etc. [0003] A...
Claims
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IPC IPC(8): G01L1/22
CPCG01L1/2281G01L1/2262G01L1/2287
Inventor 艾育林陈建华
Owner 江西万年芯微电子有限公司