A dry contact switch based on HPLC communication

Abstract

The present invention relates to the field of smart home, and discloses a dry contact switch based on HPLC communication, including a control circuit arranged on a mainboard, the control circuit including a main control module, a power module, a carrier communication module, a coupling transformer, an optocoupler output module and a thyristor control circuit, the power module is used to convert the external mains electricity into a DC voltage and then supply power to the main control module, the carrier communication module, the optocoupler output module and the thyristor control circuit, the main control module is used to receive a dry contact signal, and output a signal to control the on and off of the optocoupler output module; the control end of the thyristor control circuit is connected to the output end of the optocoupler output module, the input end is connected to the mains live wire, and the output end is used to connect to the power terminal; the main control module is connected to the carrier communication module, and the carrier communication module is connected to the mains power line communication through a coupling transformer. The present invention adopts a zero live wire access mode, has good compatibility, low requirements on lamps, and does not have the faint light and flickering phenomenon of a single live wire switch.

Description

Technical Field

[0001] The invention relates to the field of smart home, and in particular to a dry contact switch based on HPLC communication. Background Art

[0002] With the continuous development of smart home technology, smart switches are becoming more and more common in homes, hotels and other places. Existing smart switches mainly have single live wire access and neutral live wire access. Single live wire smart switches only need to connect a single live wire, no neutral wire is needed, and control the lamps by controlling the live wire on and off; neutral live wire smart switches need to connect neutral live wires, and control the lamps by controlling the live wire on and off. Existing smart homes mainly transmit information through wireless communication and wired communication to achieve intelligent control of homes, hotels and other places. Wireless communication mainly includes Bluetooth, WIFI, Zigbee, etc., and wired communication mainly includes 485 bus, CAN bus, etc.

[0003] The above-mentioned currently commonly used solutions mainly have the following problems and shortcomings:

[0004] 1. The single-live-wire smart switch is powered by the power module, which will cause current to flow through the lamp. If the standby input current is too small, the smart switch device will not operate normally; if the standby input current is too large, the filter capacitor voltage inside the lamp will be charged to a large enough level, causing the lamp to flicker after it is turned off. Therefore, the single-live-wire smart switch has poor compatibility.

[0005] 2. When using wireless communications, such as Zigbee, Bluetooth, and WIFI, the ability to penetrate walls is weak, there are problems such as signal coverage blind spots and short communication distances, resulting in a poor device linkage experience; when using wired communications, wiring is required in advance, the cost is high, and the post-installation environment is limited.

[0006] 3. Existing smart switch panel products have a single appearance, and customers have few appearance choices.

[0007] Therefore, it is necessary to provide a new intelligent switch to solve the defects and shortcomings of the current mainstream intelligent switches. Summary of the invention

[0008] In order to meet the actual needs of the smart home field, the present invention overcomes the shortcomings of the prior art and aims to solve the technical problem of providing a dry contact switch based on HPLC communication.

[0009] In order to solve the above technical problems, the technical solution adopted by the present invention is: a dry contact switch based on HPLC communication, including a control circuit arranged on a main board, the control circuit including a main control module, a power supply module, a carrier communication module, a coupling transformer, an optocoupler output module and a thyristor control circuit, the power supply module is used to convert the external AC power into a DC voltage and then supply power to the main control module, the carrier communication module, the optocoupler output module and the thyristor control circuit, the main control module is used to receive a dry contact signal and output a signal to control the on and off of the optocoupler output module; the control end of the thyristor control circuit is connected to the output end of the optocoupler output module, the input end is connected to the AC live wire, and the output end is used to connect to the power terminal; the communication end of the main control module is connected to the carrier communication module, and the carrier communication module is connected to the AC power line communication through a coupling transformer.

[0010] The thyristor control circuit includes multiple thyristors, and the optocoupler output module includes multiple optocoupler control circuits. The input ends of the multiple thyristors are connected to the input end of the mains live wire, and the control ends are respectively connected to the output ends of an optocoupler control circuit. The model of the thyristor is: JST08K-800CW, and the model of the optocoupler in the optocoupler control circuit is MOC3063S.

[0011] On the main board, a ceramic heat sink is arranged on the surface of the thyristor.

[0012] The control circuit also includes a temperature sensor, which is configured to measure the temperature of each thyristor in the thyristor control circuit and send it to the main control module. The main control module is used to control the corresponding optocoupler output module to disconnect when the temperature of the thyristor is greater than 90°.

[0013] The power supply module includes an AC-DC circuit and a DC-DC circuit. The AC-DC circuit is used to convert AC mains power into 12V DC power, and the DC-DC circuit is used to convert 12V DC power into 3.3V DC power.

[0014] The control circuit also includes a dry contact input detection circuit and a dry contact input and output interface. The dry contact signal emitted by the dry contact device enters the dry contact input detection circuit through the dry contact input and output interface, and is input into the main control module through the dry contact input detection circuit.

[0015] The control circuit also includes a dry contact output circuit. The dry contact signal output by the main control module is output via the dry contact output circuit and the dry contact input and output interface, and is used to output the signal to control the switch of the indicator light of the dry contact device.

[0016] ESD protection circuits are arranged between the main control module and the carrier communication module, between the dry contact input detection circuit and the main control module, and between the dry contact output circuit and the dry contact input and output interface.

[0017] The dry contact switch based on HPLC communication also includes a lower shell and an upper shell. The main board is arranged in the lower shell, and the lower shell is closed by the upper shell. A wiring terminal is arranged on one side of the lower shell.

[0018] The model of the main control module is ES8P5086, and the model of the carrier communication module is ES1667-NC.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The present invention adopts a zero-live wire access method, and does not need to draw power from a single live wire. The lamp is controlled by controlling a thyristor, which has good compatibility and low requirements for lamps. There is no dimming and flickering phenomenon existing in a single live wire switch.

[0021] (2) The present invention uses HPLC (broadband carrier communication) to achieve communication between different smart devices, without the need for rewiring, with low cost, stable signal transmission, long transmission distance, and no coverage dead spot problem.

[0022] (3) The present invention integrates dry contact modules and actuator functions, and can realize local / remote control of 2-way lamps or other dry contact devices. The device is miniaturized and can be placed in an 86-box, which reduces the cost of the device. At the same time, users can freely choose various switch panels, card-insertion power devices, gas alarms and other devices that can use dry contact signals according to their preferences and room decoration style. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural principle diagram of a dry contact switch based on HPLC communication proposed by the present invention;

[0024] Figure 2 1 is a circuit schematic diagram of a carrier communication module and a coupling transformer in an embodiment of the present invention;

[0025] Figure 3 1 is a circuit schematic diagram of a thyristor control circuit and an optocoupler output module in an embodiment of the present invention;

[0026] Figure 4 is a circuit schematic diagram of a power module in an embodiment of the present invention;

[0027] Figure 5 It is a circuit schematic diagram of a dry contact input detection circuit and a dry contact input and output interface in an embodiment of the present invention;

[0028] Figure 6 is a circuit schematic diagram of a dry contact output circuit in an embodiment of the present invention;

[0029] Figure 7 is a circuit schematic diagram of an ESD protection circuit in an embodiment of the present invention;

[0030] Figure 8 is a circuit schematic diagram of a main control module in an embodiment of the present invention;

[0031] Fig. 9 A schematic diagram of the appearance of a dry contact switch based on HPLC communication proposed in an embodiment of the present invention;

[0032] Fig.10 The present invention is a schematic diagram of the installation of a dry contact switch based on HPLC communication proposed in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to make the technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in combination with specific embodiments and drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] like Figure 1 As shown, an embodiment of the present invention provides a dry contact switch based on HPLC communication, including a control circuit arranged on a main board, wherein the control circuit includes a main control module, a power supply module, a carrier communication module, a coupling transformer, an optocoupler output module and a thyristor control circuit, wherein the power supply module is used to convert an external AC power into a DC voltage and then supply power to the main control module, the carrier communication module, the optocoupler output module and the thyristor control circuit, the main control module is used to receive a dry contact signal and output a signal to control the on and off of the optocoupler output module, the control end of the thyristor control circuit is connected to the output end of the optocoupler output module, the input end is connected to the AC live wire, and the output end is used to connect to a power terminal; the communication end of the main control module is connected to the carrier communication module, and the carrier communication module is connected to the AC power line communication through a coupling transformer.

[0035] In this embodiment, the main control module uses a 32-bit MCU of Shanghai Neusoft Carrier Microelectronics model ES8P5086 as the main control, and the MCU has 72KB FLASH, 16KB RAM and 29 I / O. The dry contact signal referred to in the present invention is an active dry contact signal, and the active dry contact signal means that the signal has two states, energized and unenergized, with polarity, and the two contacts cannot be connected in reverse. The carrier module is a Neusoft Carrier ES1667-NC carrier module, which communicates with the main control module through a serial port, and provides a carrier signal path between strong electricity and weak electricity through a coupling transformer, thereby realizing communication with smart devices with broadband carrier communication functions, and then realizing the control and scenario linkage of smart home devices.

[0036] like Figure 2 As shown, it is a circuit schematic diagram of the carrier communication module and the coupling transformer in this embodiment. The functions of the carrier communication module and the coupling transformer are as follows: the ES1667-NC carrier module is connected to the main control module through the serial port uplink to realize information transmission with the main control module, and the ES1667-NC carrier module couples the differential signal to the live wire (L) and the neutral wire (N) through the coupling transformer T2 and the capacitor C19 downlink, and transmits it to the intelligent carrier communication terminal, thereby realizing the control of the carrier communication equipment and the scene linkage between the equipment. In the thyristor control circuit, the thyristor is used as an AC contactless switch to control the on and off of the AC power. The main control module controls the conduction of the optical coupler through the GPIO, and triggers the conduction of the thyristor through the optical coupler to realize the switch control function of the lamp. The temperature sensor is used to detect the surface temperature of the thyristor. When the temperature is detected to be greater than 90°C, the thyristor is turned off to prevent the thyristor from burning out due to excessive temperature. The main control module is also used to communicate with the carrier, detect the dry contact signal input, control the dry contact signal output, and control the conduction of the thyristor.

[0037] Specifically, in this embodiment, Figure 3 As shown, in this embodiment, the thyristor control circuit includes 2 thyristors, the optocoupler output module includes 2 optocoupler control circuits, the input ends of the multiple thyristors are connected to the mains live wire input end, and the control ends are respectively connected to the output ends of an optocoupler control circuit, the model of the thyristor is: JST08K-800CW, and the model of the optocoupler in the optocoupler control circuit is MOC3063S. Specifically, in this embodiment, on the mainboard, a ceramic heat sink is provided on the surface of the thyristor. The ceramic heat sink is attached to the surface of the thyristor to dissipate heat and isolate strong and weak electricity from the thyristor.

[0038] Furthermore, in this embodiment, the control circuit further includes an NTC temperature sensor, which is configured to measure the temperature of each thyristor in the thyristor control circuit and send it to the main control module, and the main control module is configured to control the corresponding optocoupler output module to disconnect when the temperature of the thyristor is greater than 90°. The NTC sensor can detect the surface temperature of the thyristor, and when the temperature is higher than 90°C, the thyristor is turned off to prevent the thyristor from being overheated and burned out.

[0039] Furthermore, if Figure 4 As shown, it is a circuit schematic diagram of the power module in this embodiment. In this embodiment, the power module includes an AC-DC circuit and a DC-DC circuit. The AC-DC circuit is used to convert AC mains power into 12V DC power, and the DC-DC circuit is used to convert 12V DC power into 3.3V DC power. Specifically, in this embodiment, the AC-DC circuit mainly converts 100V~240V AC power into a 12V DC power supply to supply power to the carrier module, the main control module and the outside. The output power of the AC-DC circuit is 2.5w, which can meet the equipment and external output requirements. The DC-DC circuit mainly converts the 12V DC power supply into a 3.3V DC power supply to supply power to the carrier communication module and the main control module.

[0040] Furthermore, if Figure 1 As shown, in this embodiment, the control circuit also includes a dry contact input detection circuit and a dry contact input and output interface. The dry contact signal emitted by the dry contact device enters the dry contact input detection circuit through the dry contact input and output interface, and is input into the main control module through the dry contact input detection circuit. Figure 5 , which is a circuit schematic diagram of the dry contact input detection circuit and the dry contact input and output interface in this embodiment. Among them, the four dry contact signals K1, K2, K3 and K4 enter through the dry contact input and output interface, and then are converted into MCU_K1, MCU_K2, MCU_K3, MCU_K4 signals after the dry contact input detection circuit and input into the main control module.

[0041] Furthermore, if Figure 1 As shown, in this embodiment, the control circuit also includes a dry contact output circuit, and the dry contact signal output by the main control module is output through the dry contact output circuit and the dry contact input and output interface, and is used to output the signal to control the switch of the indicator light of the dry contact device. Figure 6 The figure shows the circuit schematic diagram of the dry contact output circuit in this embodiment. Among them, the four dry contact signals MCU_D1, MCU_D2, MCU_D3, and MCU_D4 are output from the main control module, and then converted into DO1, DO2, DO3, and DO4 signals by the dry contact output circuit and output through the dry contact input and output interface to control the switch of the indicator light of the dry node device.

[0042] Furthermore, if Figure 7 As shown, in this embodiment, an ESD protection circuit is provided between the main control module and the carrier communication module, between the dry contact input detection circuit and the main control module, and between the dry contact output circuit and the dry contact input and output interface. The ESD protection circuit can absorb the released static electricity and prevent the impact on electronic components when the static electricity is released.

[0043] like Figure 8 As shown, it is the circuit schematic diagram of the main control module in this embodiment. When the dry contact signal is input, the main control module detects the dry contact signal input through the dry contact input detection circuit, and after corresponding logic processing, it outputs the control signal to control the local control module and the linkage control module to complete the corresponding function. GPIO controls the optocoupler MOC3063S, and then controls the thyristor output to achieve local control and remote control of lamps or other matching dry contact devices. In addition, the main control module also receives the temperature signal of the temperature sensor. When the temperature is higher than 90°C, the thyristor is turned off to prevent the thyristor from being overheated and burned out.

[0044] like Fig. 9 As shown, a dry contact switch based on HPLC communication in this embodiment also includes a lower shell 2 and an upper shell 3, the mainboard 1 is arranged in the lower shell 2, and the lower shell 2 is closed by the upper shell 3, and 4 wiring terminals 4 are arranged on one side of the lower shell 1, and the 4 wiring terminals can be connected to wires of 4 square meters or less, wherein 1 terminal is connected to the neutral line, 1 terminal is connected to the live line, and the other 2 terminals are live line output terminals, which are connected to the live line of the lamp. A dry contact input and output interface 5 is arranged on the surface of the upper shell 3. In this embodiment, the 4-way dry contact signal input and output interface is located at the lower right corner of the upper shell in the system composition diagram, and the dry contact signal input and output circuit includes 4-way dry contact signal input and 4-way dry contact signal output. The dry contact signal input interface is used to detect dry contact signals emitted by various devices that can output dry contact signals, such as ordinary mechanical switches, switch panels, SOS devices, card-insertion power devices, gas alarms, window magnets, door magnets, etc., and the dry contact signal output interface is used to control the switch of the indicator light of the dry contact device.

[0045] The dry contact switch provided by the embodiment of the present invention can be placed in a standard 86 box without affecting the normal use of the switch panel. It can support 4-way dry contact signal input and output, 12V external power supply, and has 2-way control actuators. It can communicate via HPLC (broadband power line carrier). The product appearance size is designed to be 58mm (L) * 62.45mm (W) * 17mm (H). Fig.10As shown, it is a schematic diagram of the installation of the dry contact switch of this embodiment. During installation, the dry contact switch of this embodiment is connected with strong current wires and placed in the 86 dark box 10. The dry contact switch 6 and the lower shell 7 of the switch panel are connected with the weak current control line 8. The lower shell 7 of the switch panel is fixed to the 86 dark box by two screws 9, and then the upper cover 10 of the switch panel is fastened to complete the installation of the dry contact switch and the switch panel.

[0046] The present invention provides a dry contact switch based on HPLC communication, which adopts a zero-live wire access method, does not need to draw power from a single live wire, and controls lamps by controlling thyristors. It has good compatibility, low requirements for lamps, and does not have the dimming and flickering phenomena of a single live wire switch. In addition, the present invention uses HPLC (broadband carrier communication) to achieve communication between different intelligent devices, without the need for rewiring, low cost, stable signal transmission, long transmission distance, and no coverage dead angle problem. Moreover, the integrated dry contact module and actuator functions can realize local / remote control of 2-way lamps or other dry contact devices. The equipment is miniaturized and can be placed in an 86-box, reducing the cost of the equipment. At the same time, users can freely choose various switch panels, card-insertion power-taking devices, gas alarms and other devices that can use dry contact signals according to their preferences and room decoration style.

[0047] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A dry contact switch based on HPLC communication, characterized in that: It comprises a control circuit arranged on a mainboard, the control circuit comprising a main control module, a power supply module, a carrier communication module, a coupling transformer, an optocoupler output module and a thyristor control circuit, the power supply module is used to convert an external mains power into a DC voltage and then supply power to the main control module, the carrier communication module, the optocoupler output module and the thyristor control circuit, the main control module is used to receive a dry contact signal and output a signal to control the on and off of the optocoupler output module; the control end of the thyristor control circuit is connected to the output end of the optocoupler output module, the input end is connected to the mains live wire, and the output end is used to connect to the power terminal; the communication end of the main control module is connected to the carrier communication module, and the carrier communication module is connected to the mains power line communication through a coupling transformer; The control circuit also includes a dry contact input detection circuit and a dry contact input and output interface. The dry contact signal emitted by the dry contact device enters the dry contact input detection circuit through the dry contact input and output interface, and is input into the main control module through the dry contact input detection circuit.

2. A dry contact switch based on HPLC communication according to claim 1, characterized in that: The thyristor control circuit includes multiple thyristors, and the optocoupler output module includes multiple optocoupler control circuits. The input ends of the multiple thyristors are connected to the input end of the mains live wire, and the control ends are respectively connected to the output ends of an optocoupler control circuit. The model of the thyristor is: JST08K-800CW, and the model of the optocoupler in the optocoupler control circuit is MOC3063S.

3. A dry contact switch based on HPLC communication according to claim 1, characterized in that: On the main board, a ceramic heat sink is arranged on the surface of the thyristor.

4. A dry contact switch based on HPLC communication according to claim 1, characterized in that: The control circuit also includes a temperature sensor, which is configured to measure the temperature of each thyristor in the thyristor control circuit and send it to the main control module. The main control module is used to control the corresponding optocoupler output module to disconnect when the temperature of the thyristor is greater than 90°.

5. A dry contact switch based on HPLC communication according to claim 1, characterized in that: The power supply module includes an AC-DC circuit and a DC-DC circuit. The AC-DC circuit is used to convert AC mains power into 12V DC power, and the DC-DC circuit is used to convert 12V DC power into 3.3V DC power.

6. A dry contact switch based on HPLC communication according to claim 1, characterized in that: The control circuit also includes a dry contact output circuit. The dry contact signal output by the main control module is output via the dry contact output circuit and the dry contact input and output interface, and is used to output the signal to control the switch of the indicator light of the dry contact device.

7. A dry contact switch based on HPLC communication according to claim 6, characterized in that: ESD protection circuits are arranged between the main control module and the carrier communication module, between the dry contact input detection circuit and the main control module, and between the dry contact output circuit and the dry contact input and output interface.

8. The dry contact switch based on HPLC communication according to claim 1, characterized in that: It also includes a lower shell and an upper shell. The mainboard is arranged in the lower shell, and the lower shell is closed by the upper shell. A wiring terminal is arranged on one side of the lower shell.

9. A dry contact switch based on HPLC communication according to claim 1, characterized in that: The model of the main control module is ES8P5086, and the model of the carrier communication module is ES1667-NC.

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