Motion sensor temperature drift correction method and system, and electronic device

A motion sensor, temperature drift technology, used in the testing/calibration of speed/acceleration/shock measurement equipment, instruments, speed/acceleration/shock measurement, etc. long-term problems, to achieve high efficiency, solve calibration and compensation problems, and low cost

Active Publication Date: 2017-12-26
SHANGHAI WINGTECH INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since VR devices generally consume a lot of power and generate considerable heat, the impact of temperature on sensors is more significant
[0004] Usually, it is inconvenient to calibrate the temperature drift during the production process, and equipment such as an incubator is required, and because the heat conduction path is also long, it takes a long time for the temperature of the incubator to adjust to the temperature change of the sensor itself, and there is no mass production. sex
The general practice is not to do temperature compensation, or only test a set of data for several samples in the laboratory as the basis for compensation, but there is no way to test each individual, resulting in inconsistent performance of the produced products

Method used

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  • Motion sensor temperature drift correction method and system, and electronic device
  • Motion sensor temperature drift correction method and system, and electronic device
  • Motion sensor temperature drift correction method and system, and electronic device

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Experimental program
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Effect test

Embodiment 1

[0042] see figure 1 , the present invention discloses a motion sensor temperature drift correction method, the method comprising:

[0043] [Step S1] When performing temperature drift calibration, place the device to be tested on a horizontal plane, and read the temperature T0 inside the motion sensor, as well as the initial value of the acceleration and six-axis data of the gyroscope through the host computer program; select the appropriate resistance, It can easily reach a temperature of 80 degrees Celsius in 10 seconds.

[0044] [Step S2] The production fixture supplies power to the heating circuit through test points TP1 and TP2. In this embodiment, the heating circuit is independent of the motion sensor circuit and connected to the test point. During production, the test point of the fixture supplies power to the heating circuit to realize rapid heating; the heating circuit adopts a surface-mounted power resistor, and In order to heat up quickly, it is isolated from the ...

Embodiment 2

[0049] The present invention discloses a temperature drift correction method for a motion sensor, the method comprising:

[0050]Step S1, set the device to be tested, and read the temperature T0 inside the motion sensor, as well as the initial value of the acceleration and six-axis data of the gyroscope through the host computer program;

[0051] Step S2, supplying power to the heating circuit;

[0052] Step S3, the upper computer program records the deviation between the six-axis data of the motion sensor and the initial value at each temperature point;

[0053] Step S4, writing the deviation value into the memory of the device;

[0054] Step S5. When the device is in use, according to the current temperature of the motion sensor, the motion sensor data is compensated by a linear approximation compensation method to obtain more accurate motion sensor data.

Embodiment 3

[0056] see figure 2 , the present invention discloses a motion sensor temperature drift correction system, the system includes: a server 10 , an electronic device 1 , and a heating control device 2 .

[0057] The electronic device 1 includes a memory, a motion sensor, a temperature sensor, a heating circuit arranged close to the motion sensor, and a temperature compensation module.

[0058] The heating control device 2 supplies power to the heating circuit 1; the temperature sensor is used to sense the real-time temperature data of the motion sensor, and when the deviation data is obtained, the temperature data is fed back to the server, and the sensed data is sent to the server when the device is in use to the temperature compensation module.

[0059] The server 10 is connected to the electronic device, records the deviation between the six-axis data of the motion sensor and the initial value at each temperature point; and writes the deviation value into the non-volatile me...

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PUM

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Abstract

The invention discloses a motion sensor temperature drift correction method and system, and an electronic device. The method comprises the steps: step S1, setting a device to be tested, and reading the temperature T0 inside a motion sensor, the acceleration speed and data initial values of six axes of a gyro by an upper computer program; step S2, supplying power to a heating circuit; step S3, recording bias of the six axis data of the motion sensor and the initial values at each temperature point by the upper computer program; step S4, writing the bias value in a memory of the device; and step S5, in the use of the device, according to the current motion sensor temperature, adopting a linear approximation compensation method to compensate the motion sensor data, and thus obtaining more accurate motion sensor data. The motion sensor temperature drift correction method and system provided by the invention can solve the problem of calibration and compensation of the temperature drift of the motion sensor, and have relatively high efficiency and relatively low cost.

Description

technical field [0001] The invention belongs to the technical field of electronic equipment, and relates to an electronic equipment, in particular to a temperature drift correction method of a motion sensor of an electronic equipment; meanwhile, the invention also relates to a temperature drift correction method of a motion sensor. Background technique [0002] At present, MEMS acceleration sensors and gyroscopes are widely used in portable electronic devices such as mobile phones; because the measured values ​​of acceleration sensors and gyroscopes will drift with temperature changes. However, applications such as mobile phones do not require high precision, or the ambient temperature changes relatively little, so the temperature drift is basically negligible. [0003] But on VR (virtual reality) devices, high-precision motion sensors are very critical components, and the accuracy has a great impact on the device experience. In addition, since VR devices generally consume ...

Claims

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Application Information

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IPC IPC(8): G01C25/00G01P21/00
CPCG01C25/005G01P21/00
Inventor 朱华伟
Owner SHANGHAI WINGTECH INFORMATION TECH CO LTD
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