Schneider Electric Sa

Schneider Electric Industries Sas

Schneider Electric Industries Sa

Pierre Charrier

Alain Guillot

Joël Gailledrat

Alain Tardivon

A photoelectric detector includes an electronic card connected to an emit member and a receive member, the emit member emits at least a first light signal, and the receive member receives at least a second light signal reflected from the first light signal; a cap that includes an emit lens and a receive lens made of a translucent material and positioned in front of the emit member and the receive member, respectively; and a fixing support made of an opaque material to which the card and the cap are fixed. The support has a protruding central blade that is inserted into a separating slot in the cap, between the emit lens and the receive lens.

Photoelectric detector

Photoreceptor circuit switchable between operating modes

A photoelectric cell having a receiving section fitted with an amplifier processing circuit for making the cell immune to electrical disturbances. The processing circuit uses a transfer impedance amplifier A having a gain loop 24 which is shunted by a short-circuit path 24A including a switch T1 controlled by the transmission signal E1. The switch T1 conducts when no pulses are delivered from the transmission signal E1 and does not conduct when pulses are received from the transmission signal E1.

Photoelectric cell with stabilised amplification

A photoelectric cell which detects a distance of an object, including: a first detection component configured to produce a first current which is a function of the distance of the object; a second detection component configured to produce a second current which is a function of the distance of the object; and, a processing circuit configured to shape a first voltage signal and a second voltage signal that correspond to the first current and second current, respectively. The processing circuit includes a main comparator configured to determine whether the distance of the object is greater or less than a detection range of said photoelectric cell by comparing the first voltage signal and the second voltage signal and to output a switching signal indicative of whether the distance of the object is greater or less than the detection range, and, a locking comparator configured to maintain the switching signal in an inactive state when the first voltage signal is less than a set-point voltage which corresponds to a detection distance greater than the detection range.

Photoelectric cell with lockable differential processing

A proximity detector having a power switch 30 which is switched as a function of the approach of an object. The detector includes a MOS depletion transistor T1 which connects one of the terminals 15 of the detector to a control input of a power switch 30 through a control switch T2. A regulator stage 45 is coupled to T1 in order to keep T1 saturated in the closed condition of the detector and to regulate the gate voltage of T1 when the detector is in a open state.

Proximity detector with a stable current source

A proximity detector including a rapid transistor (i.e., one having a very high product gain-band) connected to a high potential voltage via a capacitor. The capacitor is connected in series to a source of a pulsed current that is a function of the proximity of an object. The capacitor is also connected to a low potential voltage via an RC circuit. The mid-point of the RC circuit is connected to the collector of a transistor connected to the high potential voltage by a collector resistor in parallel with a gain resistor of the amplifier.

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Migne-Auxances, France

Pierre Charrier