CN219362936U - Anti-interference light curtain system - Google Patents

Abstract

An anti-interference light curtain system belongs to the technical field of elevator light curtains. The light curtain emitter comprises an emitter substrate and an infrared emission tube, wherein the infrared emission tube is attached to the emitter substrate in a horizontal mode, a light shield is sleeved on a plurality of infrared emission tubes close to a sill, the light shield is formed by enclosing a top plate, a bottom plate, side plates and a front plate, the side plates are arranged relative to the emitter substrate and are connected with one side of the top plate and one side of the bottom plate, the other side of the top plate and the bottom plate extends towards the emitter substrate, the front plate is arranged below the front side of the light emitting end of the infrared emission tube, a notch above the front plate is formed into a front light outlet, the top plate corresponds to the tail end of the infrared emission tube, and the notch on the front side of the top plate is formed into an upper light outlet. The advantages are that: the influence of sill reflection on obstacle detection can be avoided, and the detection precision of the elevator door is improved.

Description

Anti-interference light curtain system

Technical Field

The utility model belongs to the technical field of elevator light curtains, and particularly relates to an anti-interference light curtain system.

Background

The elevator sill is arranged between the vertical lifting elevator doors, plays a role in guiding the operation of the elevator car doors and landing doors, and passengers taking the elevator need to pass through the sill in the process of entering and exiting the doors after the elevator is opened. Whether the opening and closing of the elevator door is normal or not is a very important consideration in the operation of the elevator. At present, as shown in fig. 1, the detection of the obstacle at the elevator door adopts an infrared light curtain mode, a transmitter substrate 12 and a receiver substrate 22 are symmetrically arranged on the edge of the elevator door, infrared transmitting tubes 11 are arranged on the transmitter substrate 12 at intervals, an infrared receiving tube 21 is arranged on the receiver substrate 22 in a matched manner, and the infrared transmitting tubes 11 and the infrared receiving tube 21 are matched to form a light curtain 3 for detecting the entrance and the exit of passengers to control the opening and the closing of the elevator door. In the process of opening and closing the door, if the infrared receiving tube 21 does not receive the infrared signal, it indicates that an obstacle exists. For light curtains, although larger objects can be accurately detected by infrared rays, for finer objects, there is a possibility that the objects are ignored by blind areas and cause potential safety hazards. In particular, most elevator sills 6 are reflective surfaces, and signal light is reflected to the receiving end through the sills 6, so as to avoid shielding of the smaller obstacle 5, and cause misjudgment of the light curtain.

In view of the above-mentioned prior art, there is a need for an improvement in the construction of existing elevator light curtains, for which the applicant has made an advantageous design, and the technical solutions described below are created in this context.

Disclosure of Invention

The utility model aims to provide an anti-interference light curtain system which can avoid influence of sill reflection on obstacle detection and improve detection accuracy of an elevator door.

The utility model aims at achieving the purpose, an anti-interference light curtain system comprises a light curtain emitter and a light curtain receiver which are respectively arranged on the left side and the right side of an elevator car door, wherein the light curtain emitter and the light curtain receiver are matched to form a light curtain in a detection area of the elevator car door, the light curtain emitter comprises an emitter substrate longitudinally arranged on the elevator car door and a plurality of infrared emitting tubes which are distributed on the emitter substrate at intervals, the infrared emitting tubes are attached to the emitter substrate in a horizontal mode, the infrared emitting tubes comprise a packaging body and pins, the pins are bent to form welding ends parallel to the emitter substrate, and the light curtain receiver comprises a receiver substrate and infrared receiving tubes which are arranged on the receiver substrate, have the same number as the infrared emitting tubes and correspond to the positions of the infrared emitting tubes, and the anti-interference light curtain system is characterized in that: the light shield is arranged on the upper cover of the infrared transmitting tubes close to the sill, the light shield is formed by enclosing a top plate, a bottom plate, side plates and a front plate, an accommodating cavity which is matched with the infrared transmitting tubes is formed in the light shield, the side plates are arranged relative to the emitter base plate and are connected with one sides of the top plate and the bottom plate, the other sides of the top plate and the bottom plate extend towards the emitter base plate, the front plate is arranged below the front side of the light emitting end of the infrared transmitting tubes, a notch above the front plate is formed into a front light outlet, the top plate corresponds to the tail end of the infrared transmitting tubes, and the notch on the front side of the top plate is formed into an upper light outlet.

In a specific embodiment of the utility model, the top plate is provided with a top rib at the edge of one side far away from the side plate, the bottom plate is provided with a bottom rib at the position corresponding to the top rib, and the top rib and the bottom rib are matched with each other to clamp and fix the infrared emission tube.

In another specific embodiment of the present utility model, the light shield further includes a rear barrier strip connected to the top plate, the bottom plate and the side plate and located at the tail end of the infrared emission tube, for clamping the tail of the infrared emission tube.

In another specific embodiment of the present utility model, the light shield is made of ABS.

In yet another embodiment of the present utility model, the light shield is an integral piece.

Due to the adoption of the structure, compared with the prior art, the utility model has the beneficial effects that: the elevator door state monitoring system has the advantages that the elevator door state monitoring system is used for monitoring the elevator door state in real time, when the position of the detection area close to the ground is blocked by a small obstacle, the influence on the light curtain system caused by the reflection of the sill is avoided, the opposite signal is completely blocked by the obstacle, the light curtain receiver cannot receive infrared signals, misjudgment can be avoided, and the use safety of the elevator is improved.

Drawings

Fig. 1 is a schematic view of a conventional light curtain.

Fig. 2 is a schematic view of a light curtain according to the present utility model.

Fig. 3 is a schematic diagram of the assembly of the light shield and the light curtain emitter.

In the figure: 1. light curtain emitter, 11, infrared emission tube, 111, package body, 112, pins, 1121, welding end, 12, emitter substrate; 2. the light curtain receiver, 21. The infrared receiving tube, 22. The base plate of the receiver; 3. a light curtain; 4. the light shield comprises a light shield, a top plate, a 411, a top convex edge, a 42, a bottom plate, a 421, a bottom convex edge, 43, a side plate, 44, a front plate, 45, a containing cavity, 46, a front light outlet, 47, an upper light outlet, 48 and a rear barrier; 5. an obstacle; 6. a sill.

Detailed Description

The following detailed description of specific embodiments of the utility model, while given in connection with the accompanying drawings, is not intended to limit the scope of the utility model, and any changes that may be made in the form of the inventive concepts described herein, without departing from the spirit and scope of the utility model.

In the following description, all concepts related to the directions (or azimuths) of up, down, left, right, front and rear are directed to the position states where the drawings are being described, so as to facilitate public understanding, and thus should not be construed as being particularly limiting to the technical solutions provided by the present utility model.

Referring to fig. 2 and 3, the present utility model relates to an anti-interference light curtain system, which comprises a light curtain emitter 1 and a light curtain receiver 2 respectively installed at opposite sides of a left car door and a right car door of an elevator, wherein the light curtain emitter 1 and the light curtain receiver 2 are respectively connected with a controller through connecting cables, and a light curtain 3 is formed in a detection area of the elevator door. The light curtain emitter 1 comprises an emitter substrate 12 longitudinally arranged on a car door and a plurality of infrared emitting tubes 11 distributed on the emitter substrate 12 at intervals, and the light curtain receiver 2 comprises a receiver substrate 22 and infrared receiving tubes 21 which are arranged on the receiver substrate 22, have the same number as the infrared emitting tubes 11 and correspond to each other in position. The principle of reversible light path is applied, and the transmitting end and the receiving end have the same effect in left-right exchange. The infrared emission tube 11 is an LED lamp bead, and includes a package body 111 and pins 112, where the pins 112 are bent toward the emitter substrate 12 and then bent toward a direction away from the package body 111 to form a welding end 1121 parallel to the emitter substrate 12. When the welding end 1121 is welded to the emitter substrate 12, the LED lamp beads are attached to the emitter substrate 12 in a lying manner.

In order to avoid the influence of the sill reflection on the light curtain system, the utility model has the innovation points that: the light shield 4 is fixed on the outer sides of the infrared transmitting tubes 11 close to the sill, and the specific number is determined according to actual conditions. The light shield 4 is formed by enclosing a top plate 41, a bottom plate 42, a side plate 43 and a front plate 44, and an accommodating cavity 45 adapted to the infrared emission tube 11 is formed inside the light shield. The side plate 43 is disposed opposite the emitter substrate 12 and is coupled to one side of the top plate 41 and the bottom plate 42, with the other side of the top plate 41 and the bottom plate 42 extending toward the emitter substrate 12. The front plate 44 is disposed below the front side of the light emitting end of the infrared emitting tube 11, and the notch above the front plate 44 is configured as a front light outlet 46. The top plate 41 corresponds to the tail end of the infrared emission tube 11, and the notch located at the front side of the top plate 41 is configured as an upper light outlet 47. The infrared light emitted from the infrared emission tube 11 is diffused outside the light shield 4 through the front light outlet 46 and the upper light outlet 47, and the light emitted downwards, i.e. in the direction of the sill, in the infrared light emitted from the infrared emission tube 11 is blocked due to the side plate 43 and the front plate 44, so that no signal light is reflected from the sill 6 to the light curtain receiver 2. In this light curtain system, when the detection area is shielded by the small obstacle 5 at a position close to the ground, the correlation signal is shielded, and the light curtain receiver 2 will not receive the infrared signal, so that erroneous judgment can be avoided.

Further, the top plate 41 has a top rib 411 at a side edge far away from the side plate 43, the bottom plate 42 has a bottom rib 421 at a position corresponding to the top rib 411, and the top rib 411 and the bottom rib 421 cooperate with each other to clamp the infrared emission tube 11. The light shield 4 further comprises a rear blocking strip 48 connected with the top plate 41, the bottom plate 42 and the side plate 43 and located at the tail end of the infrared emission tube 11, for clamping the tail of the infrared emission tube 11. The light shield 4 is an integrated part made of ABS (English full name: acrylonitrile Butadiene Styrene, chinese name: acrylonitrile-butadiene-styrene copolymer) material.

Claims (5)

1. The utility model provides an anti-interference light curtain system, includes light curtain transmitter (1) and light curtain receiver (2) of installing opposite side on elevator left and right sedan-chair door respectively, light curtain transmitter (1) and light curtain receiver (2) cooperate and form light curtain (3) in the detection zone of elevator door, light curtain transmitter (1) including be vertical transmitter base plate (12) that set up and a plurality of infrared transmitting tube (11) of interval distribution on transmitter base plate (12) on the sedan-chair door, infrared transmitting tube (11) paste in the mode of lying on transmitter base plate (12) in a horizontal state, infrared transmitting tube (11) including encapsulation body (111) and pin (112), pin (112) buckle be formed with transmitter base plate (12) parallel welded end (1121), light curtain receiver (2) include receiver base plate (22) and set up quantity and infrared receiving tube (21) that infrared transmitting tube (11) are the same and the position corresponds on receiver base plate (22), its characterized in that: the light shield (4) is arranged on the upper cover of the infrared transmitting tubes (11) close to the sill, the light shield (4) is formed by enclosing a top plate (41), a bottom plate (42), a side plate (43) and a front plate (44), a containing cavity (45) which is matched with the infrared transmitting tubes (11) is formed in the light shield, the side plate (43) is arranged opposite to the emitter substrate (12) and is connected with one sides of the top plate (41) and the bottom plate (42), the other sides of the top plate (41) and the bottom plate (42) extend towards the emitter substrate (12), the front plate (44) is arranged below the front side of the light emitting end of the infrared transmitting tubes (11), a notch above the front plate (44) is formed into a front light outlet (46), the top plate (41) corresponds to the tail end of the infrared transmitting tubes (11), and the notch on the front side of the top plate (41) is formed into an upper light outlet (47).

2. The anti-interference light curtain system according to claim 1, wherein the top plate (41) has a top rib (411) at a side edge far from the side plate (43), the bottom plate (42) has a bottom rib (421) at a position corresponding to the top rib (411), and the top rib (411) and the bottom rib (421) are mutually matched to clamp and fix the infrared transmitting tube (11).

3. The anti-interference light curtain system according to claim 1, wherein the light shielding cover (4) further comprises a rear blocking strip (48) connected with the top plate (41), the bottom plate (42) and the side plate (43) and located at the tail end of the infrared transmitting tube (11) for clamping the tail end of the infrared transmitting tube (11).

4. The anti-interference light curtain system according to claim 1, wherein the light shielding cover (4) is made of an ABS material.

5. An anti-interference light curtain system according to claim 1, characterized in that the light shield (4) is an integral piece.