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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

Inactive Publication Date: 2014-08-13
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

U.S. Patent No. 5224075 "A device for measuring the speed of moving objects" uses the Doppler effect of sound waves to measure the speed of the hull. Although accurate measurement without water resistance can be achieved, the device is complicated, large in size and high in cost
The domestic patent No. 02138887.2 "A Non-Water Resistance Vessel Speed ​​Measuring Instrument" needs to add several acceleration sensors and signal conditioning circuits, which also makes the measurement structure more complicated and the cost increases

Method used

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

Examples

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Embodiment

[0032] Such as figure 1 Shown, a kind of ship speed measurement method of brushless DC motor ship, comprises the following steps:

[0033] Step S1: the sensor detects the speed information and current information of the motor, and sends them to the microprocessor;

[0034] Step S2: The microprocessor queries the ship speedometer in the memory. The ship speedometer is obtained through experiments before the ship speed measurement. First, different loads and different currents are selected according to specific requirements, wherein the load of the ship is {L 1 , L 2 ,...,L M}, where L 1 Indicates no load, L M Indicates full load, the load increases sequentially, the current can be adjusted through the joystick control, set as {i 1 , i 2 ,...,i N}, such that i i i+1 (i=1,...N-1), then measure the rotational speed of the motor and the speed of the ship under the same load and different currents, and record them in the table and store them in the memory until all the data ...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/42
Inventor 陈凤祥俞林炯周苏章桐
Owner TONGJI UNIV
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