KNX intelligent switch panel system and working method

Abstract

The invention discloses a KNX intelligent switch panel system and a working method, and relates to the technical field of KNX intelligent switch panels. The system comprises a KNX subsystem which is powered by a KNX main power supply and comprises a KNX transceiver; the MCU subsystem is powered by an auxiliary power supply, and the MCU subsystem comprises an MCU module and a key module; the isolation module is respectively connected with the KNX transceiver and the MCU module and is used for carrying out isolation communication; the reset module is connected with the MCU module of the MCU subsystem and used for detecting the voltage of the auxiliary power supply, and when the voltage of the auxiliary power supply is smaller than a set value, a reset signal is sent to enable the MCU module to stop sending the serial port data; and when the power ok signal is at a low level, the MCU module stops sending the serial port data. According to the KNX intelligent switch panel system and the working method provided by the invention, data interaction is performed only when the voltage of the KNX transceiver and the voltage of the MCU module are normal, so that part of functions of the panel are prevented from being abnormal due to front and back power-on, and the power supply cost is saved to the maximum extent.

Description

Technical Field

[0001] The present invention relates to the technical field of KNX intelligent switch panels, and in particular to a KNX intelligent switch panel system and a working method. Background Art

[0002] In the field of smart home, KNX can realize the control of light switches in the home, adjustment of light brightness and color, opening and closing of curtains, setting of air-conditioning temperature and wind speed, monitoring of home security systems, etc., providing residents with a comfortable, convenient and safe living environment.

[0003] Due to the high cost and limited power of the KNX main power supply, as the functions of KNX products increase, the overall power consumption of KNX products is also increasing. If KNX power supply is used alone, the number of KNX smart switch panels that can be connected is limited, which increases the KNX power supply required to complete the project and increases the construction cost.

[0004] In order to save power costs, a solution was developed to use both the KNX main power supply and the auxiliary power supply. However, during the project construction and commissioning, the KNX main power supply or the auxiliary power supply may be powered on successively, which may cause some panel functions to be abnormal. Therefore, a solution is needed to facilitate construction and commissioning. In addition, some existing main and auxiliary power supply solutions also have the problem of large KNX power consumption and unreasonable PCB layout. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a KNX intelligent switch panel system and a working method, in which data interaction is performed only when the voltages of the KNX transceiver and the MCU module are normal, thereby avoiding partial functional abnormalities of the panel due to front and back power-on and maximizing the savings in power supply costs.

[0006] In a first aspect, the present invention provides a KNX intelligent switch panel system, comprising:

[0007] A KNX subsystem, powered by a KNX main power supply, the KNX subsystem comprising a KNX transceiver;

[0008] The MCU subsystem is powered by an auxiliary power supply, and the MCU subsystem includes an MCU module and a key module;

[0009] The isolation module is connected to the KNX transceiver and the MCU module respectively, and is used to isolate the KNX main power supply and the auxiliary power supply while transmitting the serial port signal and the power ok signal; when the power ok signal is at a low level, the MCU module stops sending serial port data;

[0010] The reset module is connected to the MCU module of the MCU subsystem and is used to detect the voltage of the auxiliary power supply. When the voltage of the auxiliary power supply is less than a set value, a signal is sent to stop the MCU module from sending serial port data.

[0011] Furthermore, the isolation module specifically includes:

[0012] The digital isolation submodule is connected to the KNX transceiver and the MCU module respectively, and is used to isolate the KNX main power supply and auxiliary power supply while transmitting serial port signals in both directions;

[0013] The optocoupler isolator module is connected to the KNX transceiver and the MCU module respectively, and is used to isolate the KNX main power supply and auxiliary power supply while unidirectionally transmitting the powerok signal.

[0014] Furthermore, the MCU subsystem also includes a relay and a backlight, and the relay, the backlight and the key module are connected to the MCU module via a GPIO interface.

[0015] Furthermore, the MCU module is STM32G070CBT6.

[0016] In a second aspect, the present invention provides a KNX intelligent switch panel system working method, which requires providing the KNX intelligent switch panel system described in the first aspect, and the method comprises:

[0017] The KNX transceiver and MCU module communicate in isolation through the isolation module;

[0018] The KNX transceiver detects the voltage of the KNX main power supply. If the voltage is normal, the power ok signal is high level. If the voltage is abnormal, the power ok signal is low level.

[0019] The reset module detects the voltage of the auxiliary power supply, and when the voltage of the auxiliary power supply is less than the set value, a reset signal is sent to the MCU module;

[0020] The MCU module receives the reset signal of the reset module and receives the powerok signal through the isolation module; when the powerok signal is high and no reset module information is received, the serial port data is sent normally; when the reset signal is received or the powerok signal is low, the serial port data is stopped.

[0021] Furthermore, the setting value of the reset module is 4.38V.

[0022] The technical solution provided in the embodiments of the present invention has at least the following technical effects:

[0023] By only performing data interaction when the voltages of the KNX transceiver and MCU module are normal, partial functional abnormalities of the panel caused by power-on or power-off are avoided; by independently powering the KNX subsystem and the MCU subsystem, and the keyboard belonging to the MCU subsystem, the KNX main power supply only needs to power the KNX subsystem, and the power consumption of the KNX part of a single panel is only about 0.3W, which maximizes the power cost savings.

[0024] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0026] Figure 1 A schematic diagram of the structure of a system in an embodiment of the present invention;

[0027] Figure 2 Flow chart of the working method in an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The embodiment of the present invention provides a KNX intelligent switch panel system and a working method, and performs data interaction only when the voltages of the KNX transceiver and the MCU module are normal, thereby avoiding partial functional abnormalities of the panel caused by front and back power-on, and maximally saving power cost.

[0029] The technical solution in the embodiment of the present invention has the following general idea:

[0030] 1. In order to save power costs, the KNX subsystem and the MCU subsystem are separated and powered independently, and the interactive signals between the two use isolation IC for isolated communication;

[0031] 2. Since the panel has high power consumption including relays, buttons and backlight, these parts are all controlled by the MCU subsystem and powered by auxiliary power, so as to minimize the power consumption of the KNX subsystem;

[0032] 3. The Power OK signal is sent from the KNX subsystem to the MCU subsystem. When the signal is at a low level, it means that the voltage of the KNX subsystem is abnormal. At this time, the two do not exchange data through the UART serial port to avoid abnormal operation.

[0033] 4. The reset module detects the auxiliary power supply voltage. When the voltage level is lower than 4.38V, the two do not exchange data through the UART serial port to avoid abnormal operation.

[0034] This embodiment provides a KNX intelligent switch panel system, such as Figure 1 As shown, including:

[0035] A KNX subsystem, powered by a KNX main power supply, the KNX subsystem comprising a KNX transceiver;

[0036] The MCU subsystem is powered by an auxiliary power supply. The MCU subsystem includes an MCU module (for example, an MCU of the STM32 series model STM32G070CBT6), a key module, a relay, and a backlight, all of which are connected to the MCU module through a GPIO interface;

[0037] The isolation module is connected to the KNX transceiver and the MCU module respectively, and is used to isolate the KNX main power supply and the auxiliary power supply while transmitting the serial port signal and the power ok signal; when the power ok signal is at a low level, the MCU module stops sending serial port data, that is, the KNX transceiver and the MCU module stop exchanging data through the serial port;

[0038] Among them, the isolation module can include a digital isolation sub-module and an optocoupler isolation sub-module:

[0039] The digital isolation submodule is connected to the KNX transceiver and the MCU module respectively, and is used to isolate the KNX main power supply and auxiliary power supply while bidirectionally transmitting serial port signals (UART);

[0040] The optocoupler isolator module is connected to the KNX transceiver and the MCU module respectively, and is used to isolate the KNX main power supply and auxiliary power supply while unidirectionally transmitting the power ok signal.

[0041] The reset module is connected to the MCU module of the MCU subsystem and is used to detect the voltage of the auxiliary power supply. When the auxiliary power supply voltage is less than the set value, a signal is sent to stop the MCU module from sending serial port data, that is, the KNX transceiver and the MCU module stop exchanging data through the serial port.

[0042] The Power OK signal is sent from the KNX subsystem to the MCU subsystem. When the signal is at a low level, it indicates that the voltage of the KNX subsystem is abnormal. At this time, the two do not exchange data through the UART serial port to avoid abnormal operation. The reset module detects the auxiliary power supply voltage. When the level is lower than 4.38V, the two do not exchange data through the UART serial port to avoid abnormal operation.

[0043] From the perspective of saving power cost, the existing solution of using KNX main power supply and auxiliary power supply is to independently power the relays, buttons and backlights of the panel with high power consumption, and KNX and MCU are integrated in the same chip and powered by the KNX main power supply. In order to further save power cost, the embodiment of the present invention separates the KNX subsystem and the MCU subsystem for independent power supply.

[0044] The cost of KNX power supply is high, 30V 640mA 19.2W is about 300 yuan. The cost of auxiliary power supply is relatively low, 24V 2.5A is about 50 yuan, the cost difference is 6 times. The following is a cost comparison of the two solutions:

[0045] 1. The power consumption of the smart panel is about 2W. If it is powered by KNX main power supply alone, it can connect up to 9.6 units. To construct a 3-bedroom and 2-living room project, at least 3 KNX main power supplies are required, totaling about 900 yuan, not including the cost of the coupler.

[0046] 2. Independent power supply mode of this embodiment: The maximum power consumption of the KNX part of a single panel is about 0.3W, and the maximum power consumption of the auxiliary power part is about 1.7W. To construct a 3-bedroom and 2-living room project, only 1 KNX main power supply and a 60W auxiliary power supply are required, totaling 350 yuan, reducing the cost by about 61%.

[0047] The above cost comparison is just an example. The cost of power supplies purchased from different manufacturers varies, and the design power of each company's panels also varies.

[0048] On the other hand, from the perspective of PCB board layout, the PCB of the existing KNX smart switch panel consists of two parts - the KNX board and the key light board.

[0049] KNX board: KNX system + MCU + relay + auxiliary power supply DCDC, etc.

[0050] Key light board: several keys + LED lights, etc.

[0051] If the solution of integrating KNX and MCU under the power supply of KNX main power system is adopted, and the key signal belongs to the signal of KNX system, it will be intertwined with the signal of LED lamp auxiliary system on the PCB layout line, which is not conducive to the signal separation of main and auxiliary systems. The system structure of this embodiment is adopted, and the key module belongs to the MCU subsystem and is connected to the MCU module, which can avoid the above problems. Since the KNX system occupies a relatively small PCB area, the circuit can be completely laid out on the KNX board.

[0052] The embodiment of the present invention also provides a KNX intelligent switch panel system working method, which needs to provide the above-mentioned KNX intelligent switch panel system, such as Figure 2 As shown, the method includes:

[0053] The KNX transceiver and MCU module communicate in isolation through the isolation module;

[0054] The KNX transceiver detects the voltage of the KNX main power supply. If the voltage is normal, the power ok signal is high level. If the voltage is abnormal, the power ok signal is low level.

[0055] The reset module detects the voltage of the auxiliary power supply. When the voltage of the auxiliary power supply is less than the set value (for example, 4.38V), a reset signal is sent to the MCU module.

[0056] The MCU module receives the reset signal of the reset module and receives the powerok signal through the isolation module; when the powerok signal is high and no reset module information is received, the serial port data is sent normally; when the reset signal is received, information is sent to the KNX transceiver to inform the auxiliary voltage is abnormal, and then the serial port data is stopped; when the powerok signal is low, information is sent to the KNX transceiver to inform the main voltage is abnormal, and then the serial port data is stopped.

[0057] After the KNX transceiver receives information about abnormal voltage, it can inform the mobile phone through the gateway.

[0058] The present invention performs data interaction only when the voltages of the KNX transceiver and the MCU module are normal, thereby avoiding partial functional abnormalities of the panel caused by front and rear power-on. The KNX subsystem and the MCU subsystem are powered independently, and the keyboard belongs to the MCU subsystem. The KNX main power supply only needs to power the KNX subsystem, and the power consumption of the KNX part of a single panel is only about 0.3W, thereby maximally saving the power cost, and the layout and routing of the PCB board is more reasonable.

[0059] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A KNX intelligent switch panel system, characterized in that: include: A KNX subsystem, powered by a KNX main power supply, the KNX subsystem comprising a KNX transceiver; The MCU subsystem is powered by an auxiliary power supply, and the MCU subsystem includes an MCU module and a key module; The isolation module is connected to the KNX transceiver and the MCU module respectively, and is used to isolate the KNX main power supply and the auxiliary power supply while transmitting the serial port signal and the power ok signal; when the power ok signal is at a low level, the MCU module stops sending serial port data; The reset module is connected to the MCU module of the MCU subsystem and is used to detect the voltage of the auxiliary power supply. When the voltage of the auxiliary power supply is less than a set value, a signal is sent to stop the MCU module from sending serial port data.

2. The system according to claim 1, characterized in that The isolation module specifically includes: The digital isolation submodule is connected to the KNX transceiver and the MCU module respectively, and is used to isolate the KNX main power supply and auxiliary power supply while transmitting serial port signals in both directions; The optocoupler isolator module is connected to the KNX transceiver and the MCU module respectively, and is used to isolate the KNX main power supply and the auxiliary power supply while transmitting the powerok signal in one direction.

3. The system according to claim 1, characterized in that: The MCU subsystem also includes a relay and a backlight, and the relay, the backlight and the key module are connected to the MCU module via a GPIO interface.

4. The system according to claim 1, characterized in that: The MCU module is STM32G070CBT6.

5. A KNX intelligent switch panel system working method, characterized in that: A KNX intelligent switch panel system according to any one of claims 1 to 4 is provided, and the method comprises: The KNX transceiver and MCU module communicate in isolation through the isolation module; The KNX transceiver detects the voltage of the KNX main power supply. If the voltage is normal, the power ok signal is high level. If the voltage is abnormal, the power ok signal is low level. The reset module detects the voltage of the auxiliary power supply, and when the voltage of the auxiliary power supply is less than the set value, a reset signal is sent to the MCU module; The MCU module receives the reset signal of the reset module and receives the powerok signal through the isolation module; when the powerok signal is high and no reset module information is received, the serial port data is sent normally; when the reset signal is received or the powerok signal is low, the serial port data is stopped.

6. The method according to claim 5, characterized in that: When the power ok signal is at a low level, the MCU module sends information to the KNX transceiver to inform it of the main voltage abnormality before stopping sending serial port data; when the auxiliary power supply voltage is less than the set value, the MCU module sends information to the KNX transceiver to inform it of the auxiliary voltage abnormality before stopping sending serial port data.

7. The method according to claim 5, characterized in that: The set value of the reset module is 4.38V.

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