Duplex double-control switch device for elevator shaft illuminating lamp

Abstract

The utility model relates to the technical field of elevator shaft illuminating lamp switches, and discloses a duplex double-control switch device for an elevator shaft illuminating lamp, and a host comprises an MCU (micro control unit), a power line carrier chip, a switch, an AC-DC power supply module, a relay and a live wire and zero wire connecting interface. According to the utility model, the MCU of the host compares the on-off state identified by the MCU with the received on-off state, controls the relay according to the comparison result, and ensures that the lighting loop is switched on only when the on-off states of the host and the slave are consistent, thereby avoiding lighting abnormity caused by misoperation or line interference, and enabling the lighting logic to be more accurate and reliable; state information transmission is carried out by using the power carrier chip, additional laying of a communication line is not needed, the installation cost and complexity of the system are reduced, the switch state information can be effectively transmitted, and the stability and reliability of communication are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to elevator shaft lighting lamp switch technical field especially relates to a kind of switch device of double connection double control of elevator shaft lighting lamp. BACKGROUND

[0002] When elevator fails, if only control lighting in machine room, maintenance personnel can open floor door in the case of not turning on light, and at this time, the position of elevator car cannot be determined, and personnel falling and other safety accidents are prone to occur. Double connection double control switch device can make maintenance personnel in pit can turn on light in advance, light shaft, avoid such dangers.

[0003] If the conventional double control lighting system adopts the mode of laying additional communication line to transmit control signal, not only installation cost and construction difficulty are increased, but also communication quality can be affected due to line damage and other problems. In the conventional double control lighting system, due to line fault, signal interference and other reasons, the switch state is chaotic, and the lighting lamp is abnormally lit or extinguished. The scheme effectively avoids such problems through state comparison mechanism, and guarantees the stability of lighting system. Due to lack of zero-crossing detection, circuit components bear large current impact when switching, and service life is shortened. Unstable clock signal can cause logic error of MCU operation. Data loss after power failure can cause system to restart and need to reset parameters. Some existing elevator shaft lighting devices can have high energy consumption, which does not comply with the green energy-saving concept. In addition, the shaft environment is special, and the flame-retardant and insulation performance of wire is required to be high. If the performance of wire is poor, safety hazards can be caused. If there is no standby power supply when commercial power is off. Therefore, the technical personnel in the art provide a kind of switch device of double connection double control of elevator shaft lighting lamp to solve the problems existing in the above. SUMMARY

[0004] The utility model discloses a kind of elevator shaft lighting lamp double double-control switch devices for solving the shortcomings in prior art, and to achieve the above-mentioned purpose, the utility model provides the following technical solutions: host computer: in the circuit of elevator machine room distribution box, including MCU (micro control unit), power carrier chip, switch, AC-DC power supply module, relay and live wire and zero line connection interface.AC-DC power supply module provides stable power for MCU and power carrier chip;MCU is connected with power carrier chip, and switch state information can be transmitted to power carrier chip;Power carrier chip is responsible for modulating and coupling state information to lighting circuit;The control end of relay is connected with MCU, and controlled end connects lighting loop power supply, and the MCU of host computer identifies switch state (1 represents turn-on, 0 represents turn-off), and compares itself switch state with switch state transmitted by power carrier from slave machine.If both states are same, MCU controls relay attraction, turns on lighting loop power supply, and makes lighting lamp light up;If state is different, then relay does not attract, lighting loop is not electrified, and lighting lamp does not light.

[0005] Preferably, pit double-control switch device slave machine: in the circuit of elevator pit, including MCU, power carrier chip, switch, AC-DC power supply module.Its AC-DC power supply module also powers MCU and power carrier chip;Switch is used to input control signal to MCU;MCU is connected with power carrier chip, and power carrier chip modulates and couples slave machine's switch state information to lighting circuit on the other hand, receives state information sent by host computer power carrier chip and transmits to slave machine's MCU, and slave machine receives operating signal through switch, and after MCU processing, it is transmitted to host computer by power carrier chip, and simultaneously receives state information sent by host computer, and cooperates host computer to realize lighting control logic.

[0006] Preferably, it is connected with MCU, is used to detect alternating current zero-crossing point, and transmits zero-crossing signal to MCU, provides accurate time reference for MCU control relay and other operations, reduces current impact and interference.

[0007] Preferably, it provides stable clock signal for MCU, ensures that MCU internal logic operation and data processing and other operations are carried out according to accurate time sequence.

[0008] Preferably, it contains Flash chip, is used to store program and data, so that device can still save critical settings and running data after power failure, and can quickly restore working condition when re-powering.

[0009] Preferably, TD1466 chip is used to convert 12V power input into 3.3V power supply, and supply power for MCU chip.

[0010] Preferably, mounting base is installed in the middle position of the bottom of the device body.

[0011] Preferably, the power carrier chip has modulation and demodulation functions, can modulate digital signals to be transmitted on the power line carrier and demodulate received signals from the power line carrier, does not need to additionally lay communication lines, reduces installation cost and complexity, and the MCUs of the master and the slave adopt low-power micro control units to reduce device energy consumption.

[0012] The utility model has the advantages of the following beneficial effects:

[0013] 1. In the utility model, the MCU of the master compares the switch state recognized by itself with the switch state received from the slave, controls the relay according to the comparison result, ensures that the lighting loop is only turned on when the switch states of the master and the slave are consistent, avoids lighting abnormalities caused by misoperation or line interference, and makes lighting logic more accurate and reliable.

[0014] 2. In the utility model, the MCUs of the master and the slave adopt low-power micro control units, which reduces the energy consumption of the entire device and meets the requirements of energy saving and environmental protection. At the same time, the lighting line adopts wires with good flame retardation and insulation performance, and is equipped with a rechargeable battery interface to provide a backup power supply when the mains power is cut off, thereby improving the safety and reliability of the system.

[0015] 3. In the utility model, the power carrier chip is used for state information transmission, which does not need to additionally lay communication lines, reduces the installation cost and complexity of the system, can effectively transmit switch state information, and ensures the stability and reliability of communication.

[0016] 4. In the utility model, the zero-crossing detection circuit detects the zero-crossing point of alternating current, provides an accurate time reference for the MCU to control the relay and other operations, reduces current impact and interference when the circuit switches, prolongs the service life of circuit elements, improves the reliability of the system, the crystal oscillator circuit provides a stable clock signal for the MCU, ensures that the logic operation and data processing operations in the MCU can be performed according to an accurate time sequence, and guarantees the stability and accuracy of system operation. The Flash storage circuit can store programs and data, so that the device can still save key settings and operation data after power failure, can quickly recover to the working state after power-on again, and improves the maintainability and adaptability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole framework diagram of the elevator shaft lighting lamp double connection double control switch device of the utility model;

[0018] Figure 2 It is a zero-crossing detection circuit principle diagram of the utility model;

[0019] Figure 3 It is a switch circuit principle diagram of the utility model;

[0020] Figure 4 The power carrier signal processing circuit principle diagram of the utility model;

[0021] Figure 5 The crystal oscillation circuit principle diagram of the utility model;

[0022] Figure 6 The Flash storage circuit principle diagram of the utility model;

[0023] Figure 7 The power conversion circuit principle diagram of the utility model;

[0024] Figure 8 The internal circuit connection diagram of the double control switch device of the machine room distribution box of the utility model;

[0025] Figure 9 The elevator shaft lighting control logic flow chart of the utility model;

[0026] Figure 10 The elevator shaft lighting circuit connection schematic diagram of the utility model;

[0027] Figure 11 The elevator shaft lighting circuit topology diagram of the utility model. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0029] Refer to Figure 1 — Figure 11The application discloses a double-connection double-control switch device for an elevator shaft lighting lamp, wherein a main machine is connected to a circuit of an elevator machine room distribution box and comprises an MCU (micro control unit), a power carrier chip, a switch, an AC-DC power supply module, a relay and a live wire and zero wire connection interface. The AC-DC power supply module provides stable power for the MCU and the power carrier chip; the switch is used for inputting a control signal to the MCU; the MCU is connected with the power carrier chip and can transmit switch state information to the power carrier chip; the power carrier chip is responsible for modulating and coupling the state information to a lighting circuit; a control end of the relay is connected with the MCU, and a controlled end is connected with a lighting loop power supply; the MCU of the main machine identifies a switch state (1 represents turn-on and 0 represents turn-off) and compares the switch state of the main machine with a switch state transmitted by a slave machine through power carrier transmission. If the two states are the same, the MCU controls the relay to be attracted, the lighting loop power supply is turned on, and the lighting lamp is lighted; if the two states are different, the relay is not attracted, the lighting loop is not powered, and the lighting lamp is not lighted.

[0030] A slave machine of the pit double-control switch device is connected to a circuit of an elevator pit and comprises an MCU, a power carrier chip, a switch and an AC-DC power supply module. The AC-DC power supply module of the slave machine is also used for supplying power to the MCU and the power carrier chip; the switch is used for inputting a control signal to the MCU; the MCU is connected with the power carrier chip; the power carrier chip is used for modulating and coupling switch state information of the slave machine to a lighting circuit and receiving state information transmitted by the main machine power carrier chip and transmitting the state information to the MCU of the slave machine; the slave machine receives an operation signal through the switch, processes the operation signal through the MCU and transmits the operation signal to the main machine through the power carrier chip; the slave machine receives state information transmitted by the main machine, cooperates with the main machine to realize lighting control logic, is connected with the MCU, is used for detecting an AC power zero-crossing point, transmitting a zero-crossing signal to the MCU, providing an accurate time reference for operations of the MCU, such as controlling a relay, reducing current impact and interference, providing a stable clock signal for the MCU, ensuring that operations of the MCU, such as internal logic operation and data processing, are performed according to an accurate time sequence;

[0031] A lighting circuit and a lighting lamp are connected to the main machine and the slave machine.

[0032] The device comprises a flash chip for storing programs and data, so that the device can save key settings and running data after power off and quickly restore working state after power on again, the TD1466 chip is used to convert 12V power input into 3.3V power for supplying the MCU chip, the mounting base is installed at the middle position of the bottom of the device body, the power carrier chip has modulation and demodulation functions, can modulate digital signals to power line carrier for transmission and demodulate received signals from the power line carrier, without additional communication line, reduces installation cost and complexity, the MCU of the master and slave devices are low-power micro control units, which reduces the energy consumption of the device.

[0033] Working principle: power supply of the master and slave devices: the master and slave devices are provided with AC-DC power supply modules, which convert AC power into DC power suitable for the working of MCU and power carrier chip and other elements, provide stable power support for the normal operation of the master and slave devices. In addition, the device is also provided with a rechargeable battery interface connected to a power conversion circuit, which can provide backup power for the device when the power is off, ensuring that the system can still maintain partial functions in special circumstances.

[0034] Chip power supply: the TD1466 chip in the power conversion circuit plays a key role, its VIN pin is connected to 12V power input, converted through internal circuit, connected to inductor L5, diode D16 and other elements through SW pin, and finally outputs 3.3V power from the other end of inductor L5 to supply the MCU chip, ensuring that the chip is in the normal working voltage range, the master and slave devices are provided with switches, such as mechanical key switches, whose output terminals are connected to the input pins of the MCU. When the operator presses or releases the switch, the corresponding on-off signal will be generated and transmitted to the MCU, which will identify it as on (1) or off (0) state.

[0035] The MCU in the master and slave devices is connected to the power carrier chip. When the MCU identifies the switch state, it transmits the switch state information to the power carrier chip. The power carrier chip has modulation and demodulation functions, which modulate and couple the switch state information from the MCU into the power line carrier on the lighting line for transmission, the power carrier chip of the slave device can also receive the state information sent by the master power carrier chip and transmit it to the MCU of the slave device while modulating and coupling the slave switch state information to the lighting line; the master power carrier chip receives the state information sent by the slave power carrier chip and transmits it to the MCU of the master.

[0036] The MCU of the host compares the switch state recognized by itself with the received switch state of the slave: if the two states are different, it shows that the switch operation of the host and the slave is inconsistent, at this time the relay of the host is not attracted, the lighting circuit is not powered on, and the lighting lamp is not bright. If the two states are the same, it shows that the switch operation of the host and the slave is consistent, the relay of the host is attracted, the lighting circuit is powered on, and the lighting lamp is bright.

[0037] Zero-crossing detection: the zero-crossing detection circuit is connected with the MCU and is used for detecting the zero-crossing point of the alternating current. The circuit is composed of the resistor R23, the resistor R24, the TVS tube TVS1, the optocoupler U1 and the like which are connected between AC1+ and AC1- in sequence, the output end of the optocoupler U1 is connected with the resistor R22, the capacitor C20 and the resistor R21, and the output end of the resistor R21 is connected with the zero-crossing detection pin of the MCU. Through detecting the zero-crossing point of the alternating current, accurate time reference is provided for the MCU to control the relay and the like operation, and the current impact and interference during the circuit switching are reduced.

[0038] Crystal oscillation: the crystal oscillation circuit (XTAL) includes the crystal oscillator Y1, the two ends of which are connected with the OSCI and OSCO pins of the MCU through the resistors R26 and R28 respectively, and the two ends are also connected with the capacitors C33 and C34 respectively, and the other ends of the capacitors are grounded. The crystal oscillation circuit provides stable clock signal for the MCU, and ensures that the logic operation and data processing and the like operation in the MCU can be carried out according to accurate time sequence.

[0039] Data storage: the CE#, SO, HOLD#, SCK and SI pins of the Flash chip U5 in the Flash storage circuit are connected with the SPI_CS, SPI_DI, SPI_CK and SPI_DO pins of the MCU respectively, which is used for storing programs and data, so that the device can still save the key settings and running data after power off, and can quickly recover the working state when power on again.

[0040] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement and the like made within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A double-pole, double-control switch for elevator shaft lighting, wherein the main unit is connected to the circuit of the elevator machine room distribution box, characterized in that: It includes an MCU microcontroller unit, a power line carrier chip, a switch, an AC-DC power supply module, a relay, and an interface for connecting the live wire and the neutral wire; the MCU is connected to the power line carrier chip and is used to transmit switch status information to the power line carrier chip; the power line carrier chip is used to modulate and couple the switch status information onto the lighting circuit; the control terminal of the relay is connected to the MCU, and the controlled terminal is connected to the lighting circuit power supply. Pit dual-control switch slave unit: connected in the circuit of the elevator pit, including MCU, power line carrier chip, switch, and AC-DC power supply module; The AC-DC power supply module supplies power to the MCU and the power line carrier chip; the MCU is connected to the power line carrier chip, which is used to modulate and couple the slave's switch status information to the lighting circuit, and at the same time receive the status information sent by the master power line carrier chip and transmit it to the slave MCU; Lighting circuit and lighting fixtures: The lighting circuit is connected to the double-control switch device of the power distribution box in the machine room and the double-control switch device in the pit, and the lighting fixtures are connected to the lighting circuit.

2. The elevator shaft lighting double-gang double-control switch device according to claim 1, characterized in that: The MCU of the host machine recognizes the switch status, and the MCU of the slave machine also recognizes the switch status.

3. The elevator shaft lighting double-gang double-control switch device according to claim 1, characterized in that: The switch includes a mechanical push-button switch, the output of which is connected to the input pin of the MCU and used to send a switch on / off signal to the MCU.

4. The double-gang double-control switch device for elevator shaft lighting according to claim 3, characterized in that: It also includes a zero-crossing detection circuit, which is connected to the MCU and is used to detect the zero-crossing point of the AC current and transmit the zero-crossing signal to the MCU.

5. The double-gang double-control switch device for elevator shaft lighting according to claim 4, characterized in that: The zero-crossing detection circuit includes: resistors R23 and R24, TVS transistor TVS1, and optocoupler U1 connected sequentially between AC1+ and AC1-. The output terminal of optocoupler U1 is connected to resistor R22, capacitor C20, and resistor R21. The output terminal of resistor R21 is connected to the zero-crossing detection pin of the MCU.

6. The elevator shaft lighting double-gang double-control switch device according to claim 5, characterized in that: It also includes a crystal oscillator circuit XTAL, which includes a crystal oscillator Y1. The two ends of the crystal oscillator Y1 are connected to the OSCI and OSCO pins of the MCU through resistors R26 and R28, respectively. The two ends of the crystal oscillator Y1 are also connected to capacitors C33 and C34, respectively. The other ends of capacitors C33 and C34 are grounded.

7. The double-gang double-control switch device for elevator shaft lighting according to claim 1, characterized in that: It also includes a Flash storage circuit, which includes a Flash chip U5. The CE#, SO, HOLD#, SCK, and SI pins of the Flash chip U5 are respectively connected to the SPI_CS, SPI_DI, SPI_CK, and SPI_DO pins of the MCU. The Flash chip U5 is used to store programs and data.

8. The elevator shaft lighting double-gang double-control switch device according to claim 1, characterized in that: It also includes a power conversion circuit, which includes a TD1466 chip. The VIN pin of the TD1466 chip is connected to a 12V power input, and the SW pin of the TD1466 chip is connected to an inductor L5 and a diode D16. The other end of the inductor L5 outputs a 3.3V power supply to power the MCU chip.

9. A double-gang double-control switch device for elevator shaft lighting according to claim 1, characterized in that: The power line carrier chip is a chip with modulation and demodulation functions. It can modulate digital signals onto the power line carrier for transmission and demodulate received signals from the power line carrier. The MCUs of both the host and slave devices adopt low-power microcontroller units to reduce the energy consumption of the entire device.

10. A double-gang, double-control switch device for elevator shaft lighting according to claim 1, characterized in that: The lighting circuit uses flame-retardant and well-insulated wires to ensure electrical safety in the elevator shaft. The device also includes a rechargeable battery interface, which is connected to a power conversion circuit to provide backup power to the device when the mains power fails.

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