Ship speed measuring method and device of brushless direct current motor ship

A technology of brushed DC motor and measurement method, which is applied in the direction of devices using electric/magnetic methods, can solve problems such as high cost, increased cost, and complicated devices, and achieve the effects of low cost, satisfactory accuracy, and easy realization
CN102914664BInactive Publication Date: 2014-08-13TONGJI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TONGJI UNIV
Publication Date
2014-08-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a ship speed measuring method and device for a brushless direct current motor ship. The method comprises the following steps: a sensor detects rotating speed information and current information of the motor, a microprocessor inquires a ship speed meter in a memory, calculates the current ship speed based on the rotating speed information and the current information, and transmits the current ship speed to an indicator for display. The device comprises the microprocessor, and the sensor, the memory and the meter which are connected with the microprocessor. Compared with the prior art, the sensor transmits the measured data of the controller of the DC brushless motor to the microprocessor, the microprocessor automatically calculates to estimate the ship speed, the method and device is simpler, easy to implement and low in cost, and can achieve more satisfied accuracy.
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Description

technical field

[0001] The invention relates to a ship speed measuring method and device, in particular to a ship speed measuring method and device suitable for brushless DC motor ships used in inland rivers or lakes. Background technique

[0002] Regarding the method and device for ship speed measurement, the methods involved in current domestic and foreign patents basically use additional sensors such as electromagnetic sensors, spiral sensors or semiconductor pressure sensors, and all need to be in contact with water. U.S. Patent No. 5,224,075 "A Device for Measuring the Velocity of a Moving Object" utilizes the Doppler effect of sound waves to measure the hull velocity. Although accurate measurement without water resistance can be achieved, the device is complex, bulky, and costly. The domestic patent No. 02138887.2 "A Water-Resistant Vessel Speed ​​Measuring Instrument" needs to add several acceleration sensors and a signal conditioning circuit, which also makes the mea...

Claims

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