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Mini-type wire angle indicator

A micro, microprocessor technology, applied in the direction of instruments, measuring devices, electrical devices, etc., can solve the problems of high response frequency, low response frequency, small size, etc., and achieve high response frequency, high linearity and light weight Effect

Inactive Publication Date: 2004-11-10
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As far as the inclinometer based on solid pendulum, liquid pendulum and gas inclination sensor is concerned, the solid inclinometer is bulky and heavy; the peripheral circuit of the liquid inclinometer is complex and the response frequency is low; the gas movement of the gas inclinometer The control is complicated, and there are many factors affecting its movement, and the precision is relatively low
Therefore, the above three inclination measurements cannot meet the requirements of light weight, small size and high response frequency applications.

Method used

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Embodiment Construction

[0018] A preferred embodiment of the present invention is: see figure 1 , In this miniature recliner, the circuit board 4 is fixed in the housing 1 by four screws through the shock pad 3, and the cover 2 is sealed. The connector 6 protrudes from the window of the housing 1 .

[0019] see figure 2 , the output signal of the acceleration sensor 8 enters the low-pass filter 9, then enters the voltage follower 10, the output of the voltage follower 10 is divided by the voltage divider circuit 11, then enters the amplifier 12, and finally is input to the microprocessor 13. One of the output signals of the microprocessor 13 is output from the connector 15 in the form of analog, and the other is output from the connector 15 through the MAX202 level shifter 14 .

[0020] see image 3 , ADXL202 is a dual-axis MEMS acceleration sensor 8, its analog output X FILT , Y FILT Respectively input to low-pass filter 9 and voltage follower 10 composed of operational amplifier A1, capacitor...

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Abstract

The invention is a micro-type inclinometer, including casing, cover, circuit board installed in the casing, and connector and serial interface with the external, and its circuit structure: acceleration sensor outputs signals to enter in a microprocessor through low-pass filter, voltage follower and voltage dividing circuit and amplifier, the microprocessor outputs signals in two modes: signals in analog form is outputted directly through the connector and after MAX202 level conversion, signals are outputted through the connector. It is light, small-bulk, high-linearity, and able to measure the dip angles of two orthogonal shafts, especially applied to measure the dip angle of flier.

Description

technical field [0001] The invention relates to a micro-inclinometer, in particular to a micro-inclination measuring device based on a MEMS acceleration sensor Background technique [0002] At present, the recognized inclinometer is an inclination sensor based on horizontal measurement, which can be divided into "solid pendulum" type, "liquid pendulum" type and "gas pendulum" type in terms of working principle. The solid pendulum type widely adopts force balance servo system, which is composed of pendulum, cycloid, and bracket; the liquid pendulum type is equipped with conductive liquid in the glass shell, and has three platinum electrodes connected to the outside. The three electrodes are parallel to each other and the distance is equal. When the shell is horizontal, the depth of the electrodes inserted into the conductive liquid is equal. If an AC voltage of equal amplitude is applied between the two electrodes, an ionic current is formed between the electrodes, and the li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/30
Inventor 刘武发蒋蓁龚振邦
Owner SHANGHAI UNIV