Optoelectronic hall door detection circuit

Abstract

The utility model discloses a photoelectric formula relies on hall door detection circuit, include: door frame 1, hall door, mounting seat 2, photoelectric formula relies on detection circuit 3, signal processing circuit, controller, first control switch circuit, power and alarm, install door frame 1 at the passageway of elevator shaft corresponding every floor, and the door frame 1 is close to the side of elevator shaft passageway and is installed hall door, and the door frame 1 top is installed photoelectric formula relies on detection circuit 3, and photoelectric formula relies on detection circuit 3 is used for detecting the distance between every floor ground and mounting seat 2, photoelectric formula relies on detection circuit 3 includes: infrared ray emitter, infrared ray receiver and detection mounting panel, and the detection mounting panel is strip structure, and at least two pairs of infrared ray emitter and infrared ray receiver are installed on the detection mounting panel, and infrared first receiver is used for receiving reflected light. The photoelectric formula relies on hall door detection circuit solves the problem that the prior art cannot detect the person or object after relying on the hall door and prompts the relying personnel or object to leave.

Description

Technical Field

[0001] This utility model relates to the field of doorway detection, specifically to a photoelectric doorway detection circuit. Background Technology

[0002] An elevator system includes: a traction drive unit, steel wire ropes, a car, an elevator shaft, door frames, and landing doors. An elevator shaft is installed on the building, and a traction drive unit is installed at the top of the elevator shaft. The output end of the traction drive unit is connected to the steel wire ropes, which are fixed to the car. The traction drive unit drives the car to move up and down by driving the steel wire ropes. Each floor has a passageway in the elevator shaft that connects to the interior of the elevator shaft. A door frame is installed in the passageway, and a landing door is installed on the side of the door frame closest to the center of the elevator shaft. A car door is installed on the car, which is used to open and close the car. The landing door is used to open the door frame when the car door is opened.

[0003] Although the aforementioned elevator system enables the hall door to open its frame when the car door opens, it still has a drawback: the hall door is suspended by a weight via a suspension rope, which keeps the hall door frame closed. When the car door opens, the weight forces the hall door open. However, if the suspension rope breaks, the hall door may open automatically. If someone or an object is leaning against the hall door before the car reaches the corresponding floor, the person or object could fall into the elevator shaft, causing a fall accident. Therefore, how to detect when someone is leaning against the hall door and prompt them to move away is an urgent problem to be solved. Utility Model Content

[0004] This utility model provides a photoelectric door-leaning detection circuit to solve the problem in the prior art that it cannot detect when a person or object leans against a door and prompt the person or object to leave.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model discloses a photoelectric door-leaning detection circuit, comprising: a door frame, a door, a mounting base, a photoelectric door-leaning detection circuit, a signal processing circuit, a controller, a first control switch circuit, a power supply, and an alarm. A door frame is installed at the passageway corresponding to each floor in the elevator shaft, and a door is installed on the side of the door frame closest to the elevator shaft passageway. The photoelectric door-leaning detection circuit is installed on the top of the door frame. The photoelectric door-leaning detection circuit is used to detect the distance between each floor floor and the mounting base. The photoelectric door-leaning detection circuit includes: an infrared transmitter, an infrared receiver, and a detection mounting plate. The detection mounting plate has a strip-shaped structure, and at least two pairs of infrared transmitters and infrared receivers are mounted on the detection mounting plate. The infrared receiver is used to receive reflected light, which is the light reflected back from each floor floor by the infrared rays emitted by the infrared transmitter. The mounting plate is mounted on the mounting base. The output terminal of the infrared receiver is connected to the input terminal of the signal processing circuit, the output terminal of the signal processing circuit is connected to the input terminal of the controller, and the first output terminal of the controller is connected to the control terminal of the first control switch circuit. The power supply powers the alarm through the first control switch circuit, and the power supply powers the infrared transmitter, infrared receiver, and controller.

[0007] Preferably, the power supply provides power to the infrared transmitter through the second control switch circuit, and the output of the second control switch circuit is connected to the second output of the controller.

[0008] Preferably, the X direction is perpendicular to the surface of the hall door, and there are at least two photoelectric detection circuits arranged in the X direction.

[0009] Preferably, the bottom surface of the mounting base has a mounting groove, and a photoelectric detection circuit is installed in the mounting groove.

[0010] Preferably, a light-transmitting plate is fastened to the bottom surface of the mounting base, and the light-transmitting plate blocks the mounting groove.

[0011] Preferably, the mounting base has an L-shaped structure and includes a vertical plate and a horizontal plate. The vertical plate is in close contact with the front side of the door frame, and the horizontal plate is in close contact with the inner top wall of the door frame. The vertical plate and the horizontal plate are connected. A photoelectric support detection circuit is installed on the horizontal plate. At least one photoelectric support detection circuit is installed on the front side of the door frame away from the elevator shaft.

[0012] Preferably, the signal processing circuit includes: capacitor C1, resistor R2, Zener diode D3, resistor R3, sliding resistor RV1, and comparator U1. The positive terminal of capacitor C1 is the input terminal of the signal processing circuit, and the negative terminal of capacitor C1 is grounded. The positive terminal of capacitor C1 is connected to the first terminal of resistor R2, the second terminal of resistor R2 is connected to the anode of Zener diode D3, the cathode of Zener diode D3 is grounded, the power supply is connected to the first terminal of resistor R3, the second terminal of resistor R3 is connected to the first fixed terminal of sliding resistor RV1, the second fixed terminal of sliding resistor RV1 is grounded, the second fixed terminal of sliding resistor RV1 is connected to the sliding terminal of sliding resistor RV1, the first fixed terminal of sliding resistor RV1 is connected to the inverting input terminal of comparator U1, the non-inverting input terminal of comparator U1 is connected to the first terminal of resistor R2, and the output terminal of comparator U1 is the output terminal of the signal processing circuit.

[0013] Preferably, the second control switch circuit includes: an NPN transistor Q1, the base of the NPN transistor Q1 is the control terminal of the second control switch circuit, the emitter of the NPN transistor Q1 is grounded, the collector of the NPN transistor Q1 is connected to the negative terminal of the infrared emitter, and the positive terminal of the infrared emitter is connected to the power supply.

[0014] Preferably, the infrared receiver includes a receiving diode D2 and a resistor R1. The anode of the receiving diode D2 is connected to the power supply, the cathode of the receiving diode D2 is connected to the first terminal of the resistor R1, the second terminal of the resistor R1 is grounded, and the cathode of the receiving diode D2 is the output terminal of the infrared receiver.

[0015] Preferably, the first control switch circuit includes: an NPN transistor Q2, the base of the NPN transistor Q2 is the control terminal of the first control switch circuit, the emitter of the NPN transistor Q2 is grounded, the collector of the NPN transistor Q2 is connected to the negative terminal of the buzzer, and the positive terminal of the buzzer is connected to the power supply.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In this application, a mounting base is installed at the door frame of the hall door. The mounting base houses a photoelectric leaning detection circuit, a signal processing circuit, a controller, a first control switch circuit, a power supply, and an alarm. The photoelectric leaning detection circuit is located at the top of the door frame and is used to detect objects within the door frame area. When someone leans against the hall door, the return light path of the photoelectric leaning detection circuit becomes shorter, thus detecting whether someone is permanently present within the door frame area next to the hall door. If someone is present, an alarm is triggered, thus achieving alarm activation when someone leans against the hall door or lingers below the door frame for a period of time. This application does not protect the program itself, as the program is a simple, known program; it only protects the circuit layout and installation location.

[0018] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a photoelectric sensor installed at the hall door, relying on a hall door detection circuit.

[0020] Figure 2 This is a circuit diagram of the photoelectric detection circuit and signal processing circuit.

[0021] Figure 3 This is a circuit diagram of the first control switch circuit, power supply, and alarm. Detailed Implementation

[0022] To make the technical means, creative features, achieved objectives and functions of this utility model clearer and easier to understand, the utility model will be further described below with reference to the accompanying drawings and specific embodiments:

[0023] like Figures 1 to 3 As shown, this utility model discloses a photoelectric leaning detection circuit for elevator shaft doors, including: a door frame 1, a hall door (not shown in the figure, the hall door is located near the elevator shaft passage to facilitate opening by the elevator car), a mounting base 2, a photoelectric leaning detection circuit 3, a signal processing circuit, a controller, a first control switch circuit, a power supply VCC, and an alarm BUZ1; a door frame 1 is installed at the passage corresponding to each floor in the elevator shaft, and a hall door is installed on the side of the door frame 1 near the elevator shaft passage. The photoelectric leaning detection circuit 3 is installed on the top of the door frame 1. The photoelectric leaning detection circuit 3 is used to detect the distance between the floor of each floor and the mounting base 2; the photoelectric leaning detection circuit 3 includes: an infrared transmitter, a red ... The system includes an external receiver and a detection mounting plate. The detection mounting plate has a strip-shaped structure and is equipped with at least two pairs of infrared transmitters and infrared receivers. The infrared receivers are used to receive reflected light, which is the light reflected back from the ground of each floor by the infrared rays emitted by the infrared transmitters. The mounting plate is mounted on mounting base 2. The output terminal of the infrared receiver is connected to the input terminal of the signal processing circuit, and the output terminal of the signal processing circuit is connected to the input terminal of the controller. The first output terminal of the controller is connected to the control terminal of the first control switch circuit. The power supply VCC supplies power to the alarm BUZ1 through the first control switch circuit. The power supply VCC also supplies power to the infrared transmitters, infrared receivers, and controller.

[0024] In this application, the power supply VCC can be a battery providing 5V, or other power supply VCC. The detection mounting plate has a strip-shaped structure. At least three sets of infrared transmitters, infrared receivers, a second control switch circuit, and a signal processing circuit are mounted on the detection mounting plate. The alarm BUZ1 is a buzzer to alert people lingering near the hall door to leave immediately. The infrared transmitters and receivers work together to detect the distance from the ground to the detection mounting plate (actually a circuit board with the infrared transmitters, receivers, second control switch circuit, and signal processing circuit soldered on it). When someone is near the hall door, the infrared transmitters and receivers detect the change in distance, thus determining whether someone is near the hall door.

[0025] In this application, the infrared emitter is an infrared diode D1. The infrared diode D1 and the receiving diode D2 are generally assembled together before leaving the factory. The receiving diode D2 can receive the light reflected back from the infrared light emitted by the infrared diode D1.

[0026] In this application, the power supply VCC powers the infrared transmitter through a second control switch circuit, the output of which is connected to the second output of the controller. This enables the infrared transmitter to operate under the control of the controller; the infrared transmitter is powered on only when the second control switch circuit is turned on by the controller, and it does not operate when the second control switch circuit is turned off by the controller.

[0027] The direction perpendicular to the surface of the hall door is the X direction. There are at least two photoelectric detection circuits 3, which are arranged in the X direction. Arranging multiple strip-shaped photoelectric detection circuits 3 in the X direction makes the detection range wider.

[0028] Preferably, the bottom surface of the mounting base 2 has a mounting groove, in which the photoelectric detection circuit 3 is installed. The mounting groove provides a mounting base for the photoelectric detection circuit 3.

[0029] Preferably, a light-transmitting plate is fastened to the bottom surface of the mounting base 2, which blocks the mounting groove. The light-transmitting plate is used to transmit infrared light.

[0030] Preferably, the mounting base 2 has an L-shaped structure and includes a vertical plate 21 and a horizontal plate 22. The vertical plate is in close contact with the front side of the door frame 1, and the horizontal plate 22 is in close contact with the inner top wall of the door frame 1. The vertical plate and the horizontal plate are connected. A photoelectric support detection circuit 3 is installed on the horizontal plate 22. At least one photoelectric support detection circuit 3 is installed on the front side of the door frame 1 away from the elevator shaft. The vertical plate 21 provides the mounting base for installation with the door frame 1, and the horizontal plate 22 is the mounting base for the photoelectric support detection circuit 3.

[0031] In this application, the signal processing circuit includes: capacitor C1, resistor R2, Zener diode D3, resistor R3, sliding resistor RV1, and comparator U1. The positive terminal of capacitor C1 is the input terminal of the signal processing circuit, and the negative terminal of capacitor C1 is grounded. The positive terminal of capacitor C1 is connected to the first terminal of resistor R2, and the second terminal of resistor R2 is connected to the anode of Zener diode D3. The cathode of Zener diode D3 is grounded. Power supply VCC is connected to the first terminal of resistor R3, and the second terminal of resistor R3 is connected to the first fixed terminal of sliding resistor RV1. The second fixed terminal of sliding resistor RV1 is grounded, and the second fixed terminal of sliding resistor RV1 is connected to the sliding terminal of sliding resistor RV1. The first fixed terminal of sliding resistor RV1 is connected to the inverting input terminal of comparator U1, and the non-inverting input terminal of comparator U1 is connected to the first terminal of resistor R2. The output terminal of comparator U1 is the output terminal of the signal processing circuit. In this application, an amplifier is no longer used to amplify the signal. Capacitor C1, resistor R2, and Zener diode D3 form a voltage regulator circuit to stabilize the voltage at the input terminal of the signal processing circuit. Resistor R3 and sliding resistor RV1 form a voltage divider. The resistance value of sliding resistor RV1 can be adjusted, thereby adjusting the voltage at the first fixed terminal of sliding resistor RV1. The voltage at the first fixed terminal of sliding resistor RV1 is the comparison voltage provided by comparator U1. This enables the comparison of the AC voltage output by the infrared receiver with the reference voltage to determine whether the AC voltage output by the infrared receiver is the voltage at which no one is approaching the hall door. The comparator outputs a high or low level so that the controller, which cannot receive analog voltage signals, can receive them. The controller uses the AT89C52 chip.

[0032] In this application, the second control switch circuit includes an NPN transistor Q1. The base of the NPN transistor Q1 is the control terminal of the second control switch circuit, the emitter of the NPN transistor Q1 is grounded, the collector of the NPN transistor Q1 is connected to the negative terminal of the infrared emitter, and the positive terminal of the infrared emitter is connected to the power supply VCC. The NPN transistor Q1 is closed only when there is a high-level input at its base, and is open when there is a low-level input, thereby controlling whether the infrared emitter is started.

[0033] In this application, the infrared receiver includes a receiving diode D2 and a resistor R1. The anode of the receiving diode D2 is connected to the power supply VCC, the cathode of the receiving diode D2 is connected to the first terminal of the resistor R1, the second terminal of the resistor R1 is grounded, and the cathode of the receiving diode D2 is the output terminal of the infrared receiver. The receiving diode D2 and the resistor R1 form a voltage divider. The resistance of the receiving diode D2 changes due to the different intensities of the infrared light reflected back, thereby causing the analog voltage output from the first terminal of the resistor R1 to be different.

[0034] The first control switch circuit includes an NPN transistor Q2. The base of the NPN transistor Q2 is the control terminal of the first control switch circuit, the emitter of the NPN transistor Q2 is grounded, the collector of the NPN transistor Q2 is connected to the negative terminal of the buzzer, and the positive terminal of the buzzer is connected to the power supply VCC. The NPN transistor Q2 is closed only when there is a high-level input at its base, and open when there is a low-level input, thus the controller controls the buzzer to work when an alarm is triggered.

[0035] Each infrared receiver is equipped with a signal processing circuit. When there are at least three infrared receivers, the outputs of the two signal processing circuits are connected to the first and second inputs of an OR gate, respectively, and the output of the OR gate is connected to the input of the controller. This reduces the requirement for the number of controller inputs.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A photoelectric detection circuit relying on hall door detection circuitry, characterized in that: include: Door frame, hall door, mounting base, photoelectric detection circuit, signal processing circuit, controller, first control switch circuit, power supply and alarm; A door frame is installed at the passageway corresponding to each floor in the elevator shaft. A hall door is installed on the side of the door frame closest to the elevator shaft passageway. A photoelectric detection circuit is installed on the top of the door frame. The photoelectric detection circuit is used to detect the distance between the floor and the mounting base on each floor. The photoelectric detection circuit includes an infrared transmitter, an infrared receiver, and a detection mounting plate. The detection mounting plate has a strip-shaped structure and at least two pairs of infrared transmitters and infrared receivers are mounted on it. The infrared receiver is used to receive reflected light, which is the light reflected back from the ground of each floor by the infrared light emitted by the infrared transmitter. The mounting plate is mounted on a mounting base. The output of the infrared receiver is connected to the input of the signal processing circuit, the output of the signal processing circuit is connected to the input of the controller, the first output of the controller is connected to the control terminal of the first control switch circuit, and the power supply provides power to the alarm through the first control switch circuit. The power supply also provides power to the infrared transmitter, the infrared receiver, and the controller.

2. The photoelectric door detection circuit according to claim 1, characterized in that, The power supply provides power to the infrared transmitter through the second control switch circuit, and the output of the second control switch circuit is connected to the second output of the controller.

3. The photoelectric door detection circuit according to claim 2, characterized in that, The direction perpendicular to the surface of the hall door is the X direction. There are at least two photoelectric detection circuits, and the photoelectric detection circuits are arranged in the X direction.

4. The photoelectric door detection circuit according to claim 3, characterized in that, The bottom surface of the mounting base has a mounting groove, and a photoelectric detection circuit is installed in the mounting groove.

5. The photoelectric door detection circuit according to claim 4, characterized in that, A light-transmitting plate is fastened to the bottom surface of the mounting base, which blocks the mounting groove.

6. The photoelectric door detection circuit according to claim 5, characterized in that, The mounting base has an L-shaped structure and includes a vertical plate and a horizontal plate. The vertical plate is in close contact with the front side of the door frame, and the horizontal plate is in close contact with the inner top wall of the door frame. The vertical plate and the horizontal plate are connected. A photoelectric detection circuit is installed on the horizontal plate. At least one photoelectric detection circuit is installed on the front side of the door frame away from the elevator shaft.

7. The photoelectric door detection circuit according to any one of claims 2 to 6, characterized in that, The signal processing circuit includes: capacitor C1, resistor R2, Zener diode D3, resistor R3, sliding resistor RV1, and comparator U1. The positive terminal of capacitor C1 is the input terminal of the signal processing circuit, and the negative terminal of capacitor C1 is grounded. The positive terminal of capacitor C1 is connected to the first terminal of resistor R2. The second terminal of resistor R2 is connected to the anode of Zener diode D3, and the cathode of Zener diode D3 is grounded. The power supply is connected to the first terminal of resistor R3. The second terminal of resistor R3 is connected to the first fixed terminal of sliding resistor RV1, and the second fixed terminal of sliding resistor RV1 is grounded. The second fixed terminal of sliding resistor RV1 is connected to the sliding terminal of sliding resistor RV1. The first fixed terminal of sliding resistor RV1 is connected to the inverting input terminal of comparator U1. The non-inverting input terminal of comparator U1 is connected to the first terminal of resistor R2. The output terminal of comparator U1 is the output terminal of the signal processing circuit.

8. The photoelectric door detection circuit according to claim 7, characterized in that, The second control switch circuit includes: an NPN transistor Q1, with the base of the NPN transistor Q1 being the control terminal of the second control switch circuit, the emitter of the NPN transistor Q1 being grounded, the collector of the NPN transistor Q1 being connected to the negative terminal of the infrared emitter, and the positive terminal of the infrared emitter being connected to the power supply.

9. The photoelectric door detection circuit according to claim 8, characterized in that, The infrared receiver includes a receiving diode D2 and a resistor R1. The anode of the receiving diode D2 is connected to the power supply, the cathode of the receiving diode D2 is connected to the first terminal of the resistor R1, the second terminal of the resistor R1 is grounded, and the cathode of the receiving diode D2 is the output terminal of the infrared receiver.

10. The photoelectric door detection circuit according to claim 9, characterized in that, The first control switch circuit includes: an NPN transistor Q2, the base of the NPN transistor Q2 is the control terminal of the first control switch circuit, the emitter of the NPN transistor Q2 is grounded, the collector of the NPN transistor Q2 is connected to the negative terminal of the buzzer, and the positive terminal of the buzzer is connected to the power supply.

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