Elevator light curtain structure with scalable monitoring range

Abstract

The application discloses an elevator light curtain structure capable of expanding a monitoring range, relates to the related technical field of elevator light curtains, and comprises a light curtain transmitting assembly and a light curtain receiving assembly, wherein the light curtain transmitting assembly and the light curtain receiving assembly are respectively located at the inner sides of two elevator doors, the light curtain transmitting assembly comprises a fixed tube and a plurality of light curtain transmitting units, the light curtain transmitting units are arranged at equal intervals in the fixed tube, and the light curtain receiving assembly comprises a fixed plate and a plurality of light curtain receiving units; the light curtain transmitting unit comprises a light curtain transmitting end, a beam splitter and a reflecting unit; in the application, the light column of the light curtain transmitting end is subjected to beam splitting treatment through the combination of the beam splitter and the reflecting unit, so that the monitoring range can be improved; the infrared rays emitted by the reflecting mirror can be moved through the cooperation of a central control end and the reflecting unit, the monitoring range is improved, the central control end can be used for adjusting the monitoring range according to the size of the elevator door, and the intelligence of the elevator light curtain structure is improved.

Description

Technical Field

[0001] This invention relates to the field of elevator light curtain technology, specifically to an elevator light curtain structure that can expand the monitoring range. Background Technology

[0002] An elevator light curtain, also known as a hazard prevention device, is a light-based elevator door safety protection device widely used in passenger elevators, freight elevators, and other similar applications. The device consists of infrared transmitters and receivers on both sides of the car door, along with dedicated cables. Some models are equipped with a power supply box to enhance electromagnetic protection. Its working principle is based on an infrared LED array controlled by an MCU, which forms a dense light curtain through continuous vertical scanning from top to bottom. When light obstruction is detected, a door reversal and opening mechanism is triggered.

[0003] In existing elevator light curtain structures, conventional light curtain transmitters and receivers are used in combination. Because the position and angle of the transmitter are fixed, the range of light curtain received by the receiver is limited, which in turn limits the scope of safety monitoring.

[0004] In summary, an elevator light curtain structure that can expand the monitoring range is designed. Summary of the Invention

[0005] In order to overcome the above-mentioned shortcomings, the present invention provides an elevator light curtain structure that can expand the monitoring range.

[0006] The present invention achieves the above objectives through the following technical solutions: An elevator light curtain structure with an expanded monitoring range includes a light curtain emitting component and a light curtain receiving component. The light curtain emitting component and the light curtain receiving component are located inside the two elevator doors respectively. The light curtain emitting component includes a fixed tube and several light curtain emitting units. Each light curtain emitting unit is equally spaced in the fixed tube. The light curtain receiving component includes a fixed plate and several light curtain receiving units. The light curtain emitting unit includes a light curtain emitting end, a beam splitter, and a reflector. The beam splitter is tilted and positioned at the front end of the light curtain emitting end, with its lower end located inside the light column emitted by the light curtain emitting end. The reflector is located in front of the beam splitter and reflects the infrared light reflected by the beam splitter to the corresponding light curtain receiving unit.

[0007] Preferably, the reflective unit includes a reflector, a fixing block, a rotating shaft, and a motor. The motor controls the rotation of the fixing block through the rotating shaft. The fixing block is fixed to the back of the reflector. Under the control of the central control unit, the motor controls the angle of the reflector, thereby controlling the position of the reflection to the receiving end of the second light curtain, thus expanding the monitoring range.

[0008] Preferably, the light curtain receiving unit includes a first light curtain receiving end and a second light curtain receiving end. The first light curtain receiving end is located directly in front of the light curtain emitting end and is used to receive infrared rays directly emitted from the light curtain emitting end. The second light curtain receiving end is located to one side of the first light curtain receiving end and is used to receive infrared rays emitted from the reflective unit.

[0009] Preferably, the second light curtain receiver is located between the two first light curtain receivers, and the infrared rays emitted by the reflective unit are located between the two first light curtain receivers. Theoretically, the range of the elevator light curtain monitoring covers the entire side of the elevator door.

[0010] Preferably, the system also includes a central control unit and a signal transceiver. The central control unit is located on a fixed tube, which is wirelessly connected to the signal transceiver. The central control unit is electrically connected to both the light curtain transmitter and the reflector unit. The signal transceiver is electrically connected to the light curtain receiver unit. The central control unit controls each light curtain transmitter to emit infrared light, while the signal transceiver receives the infrared signals from the light curtain receiver unit. The signal transceiver then sends the received signals back to the central control unit. The central control unit controls the rotation of a motor in the reflector unit to adjust the position of the light reflected to the second light curtain receiver, thereby increasing the monitoring range.

[0011] Preferably, the central control unit is equipped with a wireless communication module, which wirelessly connects to an external communication terminal, including a smartphone, laptop, or tablet. The central control unit is electrically connected to the elevator's central control box, allowing staff to directly view the operation of the elevator light curtain through the smart terminal, i.e., the external communication terminal, and also through the central control box in the elevator.

[0012] Preferably, there are two sets of light curtain emitting components and light curtain receiving components, which are parallel to each other and are arranged crosswise on both sides of the elevator door.

[0013] The beneficial effects of this invention are: in the elevator light curtain structure that can expand the monitoring range: 1. The combination of beam splitter and reflector unit enables beam splitting of the light column at the light curtain emitting end, thereby improving the monitoring range; 2. The central control unit and the reflector unit work together to move the infrared rays emitted by the reflector, which increases the monitoring range. At the same time, the central control unit can also adjust the monitoring range according to the size of the elevator door opening and closing, which improves the intelligence of the elevator light curtain structure. 3. There are two sets of light curtain transmitting and receiving components. The two sets of light curtain transmitting and receiving components are parallel to each other and are arranged crosswise on both sides of the elevator door, which can achieve simultaneous infrared coverage. Attached Figure Description

[0014] The present invention will be described by way of example and with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the reflective unit of the present invention; Figure 3 This is a structural schematic diagram of Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 5 This is a schematic diagram of the structure of Embodiment 3 of the present invention. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0016] like Figure 1 and Figure 2 As shown, an elevator light curtain structure with an expanded monitoring range includes a light curtain emitting component and a light curtain receiving component. The light curtain emitting component and the light curtain receiving component are located inside the two elevator doors respectively. The light curtain emitting component includes a fixed tube 1 and several light curtain emitting units. Each light curtain emitting unit is equally spaced in the fixed tube 1. The light curtain receiving component includes a fixed plate 2 and several light curtain receiving units. The light curtain emitting unit includes a light curtain emitting end 3, a beam splitter 4, and a reflector unit. The beam splitter 4 is tilted and set at the front end of the light curtain emitting end 3, and the lower end of the beam splitter 4 is located inside the light column emitted by the light curtain emitting end 3. The reflector unit is located in front of the mirror of the beam splitter 4, and the reflector unit reflects the infrared light reflected by the beam splitter 4 to the corresponding light curtain receiving unit.

[0017] Specifically, the reflective unit includes a reflector 5, a fixing block 10, a rotating shaft 11, and a motor 12. The motor 12 controls the rotation of the fixing block 10 through the rotating shaft 11. The fixing block 10 is fixed to the back of the reflector 5. Under the control of the central control terminal 8, the motor 12 controls the angle of the reflector 5, thereby controlling the position reflected to the second light curtain receiving terminal 7, thus expanding the monitoring range.

[0018] Specifically, the light curtain receiving unit includes a first light curtain receiving end 6 and a second light curtain receiving end 7. The first light curtain receiving end 6 is located directly in front of the light curtain emitting end 3 and is used to receive infrared rays directly emitted from the light curtain emitting end 3. The second light curtain receiving end 7 is located to one side of the first light curtain receiving end 6 and is used to receive infrared rays emitted from the reflective unit.

[0019] Specifically, the second light curtain receiver 7 is located between the two first light curtain receivers 6, and the infrared rays emitted by the reflective unit are located between the two first light curtain receivers 6. Theoretically, the range of the elevator light curtain monitoring covers the entire side of the elevator door.

[0020] Specifically, it also includes a central control terminal 8 and a signal transceiver terminal 9. The central control terminal 8 is located on the fixed tube 1, which is wirelessly connected to the signal transceiver terminal 9. The central control terminal 8 is electrically connected to the light curtain transmitter 3 and the reflector unit, respectively. The signal transceiver terminal 9 is electrically connected to the light curtain receiver unit. The central control terminal 8 is used to control each light curtain transmitter 3 to emit infrared rays, while the signal transceiver terminal 9 receives the infrared signals from the light curtain receiver unit. Subsequently, the signal transceiver terminal 9 sends the received signals back to the central control terminal 8. The central control terminal 8 controls the motor 12 in the reflector unit to rotate, thereby adjusting the position reflected to the second light curtain receiver 7, thus improving the monitoring range.

[0021] Specifically, the central control terminal 8 is equipped with a wireless communication module. The central control terminal 8 is wirelessly connected to an external communication terminal through the wireless communication module. The external communication terminal includes a smartphone, laptop or tablet computer. The central control terminal 8 is electrically connected to the central control box of the elevator. Staff can directly view the operation of the elevator light curtain through the smart terminal, i.e. the external communication terminal, and can also view it through the central control box in the elevator.

[0022] Specifically, there are two sets of light curtain emitting components and light curtain receiving components, which are parallel to each other and are arranged crosswise on both sides of the elevator door. Example

[0023] like Figure 3 As shown: When or after the elevator door opens, the central control unit 8 controls the angle of the reflector 5 through the motor 12, so that the reflected infrared rays are upward, and the corresponding infrared rays are received by the second light curtain receiver 7. Example

[0024] like Figure 4 As shown: When or after the elevator door opens, the central control unit 8 controls the angle of the reflector 5 through the motor 12, so that the reflected infrared rays are downward, and the corresponding infrared rays are received by the second light curtain receiver 7. Example

[0025] like Figure 5 As shown: When or after the elevator door opens, the central control unit 8 controls the angle of the reflector 5 through the motor 12, so that the reflected infrared rays are upward, horizontal or downward, and the corresponding infrared rays are received by the second light curtain receiver 7. Example

[0026] When the elevator door opens, the central control unit 8 controls the angle of the reflector 5 through the motor 12, so that the reflected infrared rays move from top to bottom, and the corresponding infrared rays are received by the second light curtain receiver 7. Example

[0027] After the elevator door opens, the central control unit 8 controls the angle of the reflector 5 through the motor 12, so that the reflected infrared rays move from top to bottom, and the corresponding infrared rays are received by the second light curtain receiver 7.

[0028] Based on the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this invention. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An elevator light curtain structure with an expanded monitoring range, characterized in that: It includes a light curtain emitting component and a light curtain receiving component, which are located inside the two elevator doors respectively. The light curtain emitting component includes a fixed tube and several light curtain emitting units, with each light curtain emitting unit equally spaced in the fixed tube. The light curtain receiving component includes a fixed plate and several light curtain receiving units. The light curtain emitting unit includes a light curtain emitting end, a beam splitter, and a reflector. The beam splitter is tilted and positioned at the front end of the light curtain emitting end, with its lower end located inside the light column emitted by the light curtain emitting end. The reflector is located in front of the beam splitter and reflects the infrared light reflected by the beam splitter to the corresponding light curtain receiving unit.

2. The elevator light curtain structure with an expanded monitoring range according to claim 1, characterized in that: The reflective unit includes a reflector, a fixing block, a rotating shaft, and a motor. The motor controls the rotation of the fixing block through the rotating shaft, and the fixing block is fixed to the back of the reflector.

3. The elevator light curtain structure with an expanded monitoring range according to claim 1, characterized in that: The light curtain receiving unit includes a first light curtain receiving end and a second light curtain receiving end. The first light curtain receiving end is located directly in front of the light curtain emitting end and is used to receive infrared rays directly emitted from the light curtain emitting end. The second light curtain receiving end is located to one side of the first light curtain receiving end and is used to receive infrared rays emitted from the reflective unit.

4. The elevator light curtain structure with an expanded monitoring range according to claim 3, characterized in that: The second light curtain receiver is located between the two first light curtain receivers, and the infrared light emitted by the reflective unit is located between the two first light curtain receivers.

5. The elevator light curtain structure with an expanded monitoring range according to claim 1, characterized in that: It also includes a central control unit and a signal transceiver unit. The central control unit is located on a fixed tube, and the fixed tube is wirelessly connected to the signal transceiver unit. The central control unit is electrically connected to the light curtain transmitter and the reflector unit respectively, and the signal transceiver unit is electrically connected to the light curtain receiver unit.

6. The elevator light curtain structure with an expanded monitoring range according to claim 5, characterized in that: The central control unit is equipped with a wireless communication module, which wirelessly connects to an external communication terminal, including a smartphone, laptop, or tablet computer. The central control unit is electrically connected to the elevator's central control box.

7. The elevator light curtain structure with an expanded monitoring range according to claim 1, characterized in that: The number of light curtain emitting components and light curtain receiving components is two sets, and the two sets of light curtain emitting components and light curtain receiving components are parallel to each other and are arranged crosswise on both sides of the elevator door.

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