Data detection device

Abstract

A data detection device capable of improving the simultaneity of data from two detection units even when oversampling is used. The data detection device includes a first detection unit, a second detection unit, a data acquisition unit, and a detection value determination unit. The data acquisition unit acquires first data from the first detection unit at a time point of one of the odd number and even number of times in a data detection period in which a plurality of time points are set for each fixed time, and acquires second data from the second detection unit at a time point of one the odd number and even number of times. The detection value determination unit determines a first detection value in the data detection period based on the first data, determines a second detection value in the data detection period based on the second data, and sets the sum of the number of times of acquiring the first data and the number of times of acquiring the second data in the data detection period to three in the data acquisition unit.

Description

[0001] This application is a divisional application of the invention patent application with the application number "201410566904.0" and the title "data detection method and detection device of detection device" submitted by the applicant on October 22, 2014. technical field [0002] The present invention relates to a data detection method and a detection device of a detection device such as a rotary encoder. Background technique [0003] In a rotary encoder that detects rotation of a rotating body relative to a fixed body, for example, a magnetic sensor device (detection device) having a magnet on the side of the rotating body and a magnetoresistive element or Hall sensor on the side of the fixed body is provided. Seoul components. In such a magnetic sensor device, for example, in a magnetic sensor device having a magnetoresistive element, a magnetoresistive film is formed on one side of a substrate, and based on The two outputs output by the bridge circuit detect the angu...

AI Technical Summary

Problems solved by technology

[0007] However, in Figure 7 In the oversampling shown, since the arithmetic mean of the A-phase data corresponds to the data at time t3, and the arithmetic mean of the B-phase data corresponds to the data at time t4, the arithmetic mean of the A-phase data corresponds to the B-phase data There is a time difference between the arithmetic means of

Therefore, there is a problem that the angular position of the magnet relative to the magnetic sensor device cannot be obtained with high precision when calculating the arc tangent from the A-phase data and the B-phase data.

Images