Dynamic data collection system and accurately positioning method for collection position

A technology of dynamic data acquisition and data acquisition, which is applied in control systems, motor generator control, electrical components, etc., can solve the problems of uneven motor drive pulse cycle, increased system design complexity, and collected data jitter, etc., and achieves low cost. , strong real-time, stable operation effect
CN101425772AActive Publication Date: 2009-05-06SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
Publication Date
2009-05-06

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Abstract

The invention discloses a dynamic data acquiring system and a method for precisely positioning an acquiring position thereof. The dynamic data acquiring system comprises an FPGA controller, a step motor, a driving circuit of the step motor, and a position sensor. An FPGA controlling circuit sends direction and pulse signals to the driving circuit of the step motor and maintains a position counter. The driving circuit of the step motor receives driving pulses and direction signals and drives the step motor to move. In the moving process of the step motor, when the FPGA detects that the position sensor has the effective jump, the FPGA resets the position counter, and the position counter counts the sent pulses; after a sent pulse number reaches the set position pulse number of acquiring points and the effective condition of the pulses is detected, the data acquiring operation is carried out. The invention has the advantages of accurate positioning of the acquiring points, high real-time performance, automatic control, simplicity, reliability and lower cost.
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Description

【Technical field】

[0001] The invention relates to positioning control in data collection, in particular to a positioning method therein. 【Background technique】

[0002] In the positioning of the stepper motor, for example, in a photometer that uses a filter wheel to achieve colorimetric measurement, the stepper motor drives the filter wheel to move, and it needs to be collected at a specified position during the movement to obtain measurement data. The accuracy of the location of the collection point directly determines the accuracy and repeatability of the measurement data. At present, in the application of data acquisition during the movement of the stepping motor, the location of the acquisition point mainly adopts the following methods: 1. Positioning directly through the pulse number of the stepping motor: a controller is used in the system to send a pulse signal to the drive circuit to drive the stepper motor. The motor moves, and a counter is maintained inside the co...

Claims

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