Servo-controlled automatic door having automatic detecting and a

Details Servo-controlled automatic door having automatic detecting and a Servo-controlled automatic door having automatic detecting and a

1990-03-29

1991-02-19

Ip, Paul

Electricity: motive power systems

Positional servo systems

Digital or numerical systems

318283, 318602, 318640, 318468, 318282, G05B 1928

Patent

active

049947249

ABSTRACT:
An automatic door includes a control program microprocessed in commensuration with the requirements of a servo-controlled control network of an automatic door and recorded in a read only memory (ROM), whereby upon an initiation by an electric current, a central processing unit (CPU) will give series of instructions to automatically sense the location of the automatic door and will calculate the errors after finishing each operating cycle of the moving door for re-setting the positioning point for each operation mode of a next door movement, and will always monitor the running speed of a motor for driving the door to be compared with a pre-determined value memoried in the ROM so as to exert a warning alarm and to temporarily stop or finally stop a door for safety purpose.

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patent: 4697383 (1987-10-01), Hagiwara
patent: 4736144 (1988-04-01), Chun-Pu
patent: 4893435 (1990-01-01), Shalit

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