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1. WO1990008333 - SAFETY GUARD BEAM LIGHT SWITCH

Publication Number WO/1990/008333
Publication Date 26.07.1990
International Application No. PCT/SE1990/000008
International Filing Date 04.01.1990
Chapter 2 Demand Filed 15.06.1990
IPC
F16P 3/14 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
PSAFETY DEVICES IN GENERAL
3Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
12with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
14the means being photocells or other devices sensitive without mechanical contact
G08B 13/183 2006.01
GPHYSICS
08SIGNALLING
BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
13Burglar, theft or intruder alarms
18Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
181using active radiation detection systems
183by interruption of a radiation beam or barrier
CPC
F16P 3/144
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
PSAFETY DEVICES IN GENERAL; ; SAFETY DEVICES FOR PRESSES
3Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
12with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
14the means being photocells or other devices sensitive without mechanical contact
144using light grids
G08B 13/183
GPHYSICS
08SIGNALLING
BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
13Burglar, theft or intruder alarms
18Actuation by interference with heat, light or radiation of shorter wavelength; Actuation by intruding sources of heat, light or radiation of shorter wavelength
181using active radiation detection systems
183by interruption of a radiation beam or barrier
Applicants
  • LINGER, Mats [SE]/[SE]
  • OLSSON, Torgny [SE]/[SE]
  • WIDELL, Gunnar [SE]/[SE]
Inventors
  • LINGER, Mats
  • OLSSON, Torgny
  • WIDELL, Gunnar
Agents
  • ONN, Thorsten
Priority Data
8804007-613.01.1989SE
8904144-608.12.1989SE
Publication Language English (EN)
Filing Language Swedish (SV)
Designated States
Title
(EN) SAFETY GUARD BEAM LIGHT SWITCH
(FR) INTERRUPTEUR DE LUMIERE DE FAISCEAU DE SECURITE
Abstract
(EN)
Apparatus for actively protecting people, a so-called safety guard beam light switch, comprises an electronic monitoring unit (1), an optical transmitter (40) and an optical receiver (60). The monitoring unit (1) includes an oscillator (25) which is operative to transmit a first pulse train (26) to the receiver (60), via the transmitter (40), and also directly to each of two separate logic test units (45, 65). The test units are operative to effect continuously signal-synchronized and duplicated monitoring of the serviceability of all of the components in the device and also to ascertain the presence of an optical obstacle between the transmitter (40) and the receiver (60). By-passing of the monitoring unit (1) is duplicated and monitored. In accordance with a second embodiment, one or more series-connected receiver/transmitter units (41A, 41B) are positioned between the transmitter (40) and the receiver (60). In accordance with a third embodiment, the transmitter (40) comprises a plurality of parallel-connected transmitters (40A) and the receiver (60) comprises an equal number of parallel-connected receivers (60A).
(FR)
L'invention concerne un appareil de protection active de personnes, appelé interrupteur de lumière de faisceau de sécurité, comprend une unité de contrôle électronique (1), un émetteur optique (40) ainsi qu'un récepteur optique (60). L'unité de contrôle (1) comprend un oscillateur (25) transmettant un premier train d'impulsions (26) au récepteur (60), via l'émetteur (40), et aussi directement à chacune des deux unités (45, 65) de test logiques séparées. Les unités de test ont pour rôle de procéder à un contrôle en continu synchronisé et dupliqué de signaux de l'état de tous les éléments du dispositif, et de s'assurer de la présence d'un obstacle optique entre l'émetteur (40) et le récepteur (60). Le montage en dérivation de l'unité de contrôle (1) est dupliqué et contrôlé. Selon un second mode de réalisation, une ou plusieurs unités (41A, 41B) de récepteurs/émetteurs connectées en série, sont positionnées contre l'émetteur (40) et le récepteur (60). Dans un troisième mode de réalisation, l'émetteur (40) comprend une pluralité d'émetteurs (40A) connectés en parallèle, et le récepteur (60) comprend un nombre égal de récepteurs (60A) connectés en parallèle.
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