JPH02147107U

JPH02147107U -

Info

Publication number: JPH02147107U
Application number: JP5474189U
Authority: JP
Priority date: 1989-05-12
Filing date: 1989-05-12
Publication date: 1990-12-13

Description

[Brief explanation of drawings]

第１図は本考案の一実施例の装置の概略構成図
、第２図はパルスモータに供給するパルス信号の
パルスレートの変化を示す図、第３図は本実施例
による定速走行時の余裕推力を示す図、第４図は
パルスモータの加速時の推力配分の図、第５図は
従来のパルスモータの定速時の余裕推力を示す図
である。１……クレードル、２……被検者、３……ロー
ラ、４……ガイドレール、５……駆動ローラ、６
……パルスモータ、７……タイミングベルト、８
……ドライバ、９……パルス発生器、１０……ト
ルク制御器、ｐ……推力制限値、ｑ……加速時推
力制限値、ｒ……定速時推力制限値、Ａ……走行
抵抗、Ｂ……加速力、Ｃ，Ｄ……余裕推力。 Fig. 1 is a schematic configuration diagram of a device according to an embodiment of the present invention, Fig. 2 is a diagram showing changes in the pulse rate of the pulse signal supplied to the pulse motor, and Fig. 3 is a diagram showing changes in the pulse rate of the pulse signal supplied to the pulse motor during constant speed running according to the present invention. FIG. 4 is a diagram showing thrust distribution during acceleration of a pulse motor, and FIG. 5 is a diagram showing margin thrust when a conventional pulse motor is at constant speed. 1... Cradle, 2... Subject, 3... Roller, 4... Guide rail, 5... Drive roller, 6
...Pulse motor, 7...Timing belt, 8
...Driver, 9...Pulse generator, 10...Torque controller, p...Thrust limit value, q...Thrust limit value during acceleration, r...Thrust limit value at constant speed, A...Running resistance, B...acceleration force, C, D...margin thrust.

Claims

[Scope of utility model registration request]

a speed detection means for determining whether the power means for driving the cradle is accelerating or traveling at a constant speed; and when it is determined that the power means is accelerating from the speed detected by the speed detection means, A cradle drive device comprising: a thrust limiting means that sets a thrust limiting value to a high value and changes the thrust limiting value of the power means to a low value when it is determined that the vehicle is traveling at a constant speed.