One-to-many control device and control method for civil building equipment

Abstract

The invention relates to a one-to-many control device and control method for civil building equipment, the one-to-many control device comprises a main control module, a parallel equipment interface, a man-machine interaction unit and a power supply circuit, the power supply circuit is connected with the main control module, the parallel equipment interface is connected with parallel equipment branches through a parallel loop, and the human-machine interaction unit is connected with the main control module. The main control module comprises a processor, a signal acquisition unit and a driving output unit, the processor receives a control signal from the man-machine interaction unit and an equipment branch signal fed back by the parallel equipment interface through the signal acquisition unit, and the driving output unit is provided with a dynamic impedance matching circuit. And the processor dynamically adjusts the impedance parameter by calling a preset matching algorithm, monitors the working state of each equipment branch of the parallel loop through the state feedback circuit and displays the working state. The system is simple in structure, convenient in technology upgrading and reconstruction, low in cost, safe, reliable and fast in response.

Description

Technical Field

[0001] The present application relates to a one-to-many control device and control method for civil building equipment, which is mainly suitable for the centralized control of civil building terminal equipment such as fireproof roller shutters and smoke barrier walls. Background Art

[0002] In terms of building electrical control, the control of equipment such as fire shutters and smoke barriers primarily relies on independent push-button control. Each device is equipped with a separate control button box, which is directly connected to the device's control circuit via wires. During operation, users must operate multiple button boxes one by one to achieve device control. This solution is a traditional control method widely used in building equipment control. The control logic of these devices is described in 50116-2013 "Design Specification for Automatic Fire Alarm Systems" and GB51348-2019 "Design Standard for Civil Buildings." However, this control solution has the following disadvantages: 1. In scenarios where multiple terminal devices are centrally installed, multi-point wiring leads to high construction costs and complex wiring. 2. In an emergency, the equipment needs to be operated one by one, which results in low response efficiency; 3. Lack of centralized feedback on equipment status makes management inconvenient.

[0003] Although there are bus control systems in the prior art, they have defects such as poor protocol compatibility and high modification costs. Summary of the Invention

[0004] The technical problem solved by the present application is to overcome the above-mentioned deficiencies in the prior art and to provide a one-to-many control device and control method for civil construction equipment that has a simple structure, is convenient for technical upgrading and transformation, is low in cost, safe and reliable, and has a fast response.

[0005] The technical solution adopted by the present application to solve the above-mentioned technical problems includes: a one-to-many control device for civil building equipment, including a main control module, a parallel device interface, a human-machine interaction unit and a power supply circuit, the power supply circuit being connected to the main control module, and the parallel device interface being connected to the parallel device branch via a parallel loop (wire). The main control module includes a processor, a signal acquisition unit, and a drive output unit, the processor receiving control signals from the human-machine interaction unit and device branch signals fed back by the parallel device interface via the signal acquisition unit, the drive output unit being provided with a dynamic impedance matching circuit, the dynamic impedance matching circuit including a digital potentiometer, a field-effect transistor, and a capacitor. The processor is connected to the digital potentiometer, the output end of the digital potentiometer is connected to the gate of the field-effect transistor, the source of the field-effect transistor is grounded via capacitor one, and the drain of the field-effect transistor is connected to the parallel loop via the parallel device interface. The processor dynamically adjusts the impedance parameters by calling a preset matching algorithm to solve problems such as large instantaneous starting current and voltage attenuation of long-distance lines during engineering practice. The processor monitors and displays the working status of each device branch in the parallel loop via a state feedback circuit.

[0006] The human-computer interaction unit includes a mode selection knob, a start / emergency stop button, and an equipment status indicator light. The mode selection knob and the start / emergency stop button are connected to the processor through a signal acquisition unit, and the equipment status indicator light is connected to the processor through a drive output unit.

[0007] The parallel device interface includes a photoelectric isolation circuit, a protection circuit, and a state feedback circuit. The processor is connected to each device branch through the photoelectric isolation circuit. The state feedback circuit collects electrical parameters of each device branch in real time and feeds them back to the processor through the protection circuit and the signal acquisition unit.

[0008] The parallel circuits are connected to each device branch through a switch. When the working status of a device branch is within the normal range compared with the threshold, the processor displays the branch status indicator light as green through the human-computer interaction unit; when the working status of a device branch is abnormal compared with the threshold (the difference is not less than the alarm amplitude), the processor displays the branch status indicator light as red through the human-computer interaction unit and disconnects the device branch through the switch; when the working status of a device branch is between normal and abnormal compared with the threshold, the processor displays the branch status indicator light as yellow through the human-computer interaction unit.

[0009] The technical solution adopted by the present application to solve the above technical problems includes: a one-to-many control method for civil construction equipment (which can be implemented using the above-mentioned one-to-many control device), comprising the following steps: S0. System initialization, loading device address mapping table and electrical parameter thresholds; S1. Monitor control signal (start / emergency stop button pressed / remote command): When the signal is valid, execute steps S2-S5; if the signal is invalid, return to the monitoring state; S2. Signal identification: Read the voltage / current characteristics through the state feedback circuit and match the preset signal type; S3. Detect the mode selection knob and send a drive signal according to the device pointed by the mode selection knob: S3a. Group control mode: Enables preset linkage logic to control the actions of each device (e.g., "sequential control": controls the actions of each device in sequence according to a preset sequence; "zoning control": groups devices according to their area, and all devices in the same group operate simultaneously); S3b single control mode: According to the mode selector knob pointed to the device read the device address; S4. Dynamic impedance matching: Real-time monitoring of the total impedance of the LAN, adjustment of the output stage resistor network, and keeping the signal attenuation less than 5%; S5. Feedback and troubleshooting: The current / voltage of each device branch is collected and compared with the corresponding branch threshold. If normal, the device branch status indicator will turn green. If abnormal, the device branch status indicator will turn red and the device branch will be disconnected to prevent the problem in the branch from affecting other branches. If the current / voltage is between normal and abnormal, the device branch status indicator will turn yellow. Return to the monitoring state (go to step S1).

[0010] This application solves the problems of complex wiring and inconvenient management in civil building equipment control through innovative hardware design and control methods. Its core advantages are: 1. Convenient transformation, adopting the physical contact parallel method, supports the transformation of old equipment without replacing the original control system (control box and button box); 2. A single control terminal can realize the linkage control of multiple devices, reducing installation costs and the complexity of multi-point wiring. The installation cost is reduced by about 60% and the wiring volume is reduced by 75%; 3. Real-time status feedback and exception handling functions to improve system security; 4. Improve response efficiency. Through centralized control and preset logic, emergency response time is shortened to 1 / 3 of traditional methods; 5. High reliability, using optoelectronic isolation, dynamic impedance matching and other technologies to ensure the stability and security of signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional schematic diagram of the control device of an embodiment of the present application.

[0012] Figure 2 It is a system architecture block diagram of the control device according to an embodiment of the present application.

[0013] Figure 3 It is a control flow diagram of an embodiment of the present application.

[0014] Figure 4 This is a control timing diagram of an embodiment of the present application.

[0015] Figure 5 This is a schematic diagram of a dynamic impedance matching circuit according to an embodiment of the present application.

[0016] In the figure: 1-housing, in particular an aluminum alloy housing; 2- Input port, used to connect to the remote master control button box, using standardized terminal blocks for easy wiring; 3-Parallel device interface, used to connect the button boxes of multiple devices, using standardized terminal blocks for easy wiring; 4- Heat dissipation holes: Heat dissipation holes are designed on the side to avoid heat accumulation; 5-Device status indicator, corresponding to the parallel device interface 3 respectively, uses LED light color to distinguish different states, green indicates normal, red indicates fault, and yellow indicates warning; 6- Nameplate, indicating the device model, rated voltage, power and other parameters; 7-Start / emergency stop button, red, protruding from the panel surface for easy operation; 8- Single control / group control knob, located on the front of the device, designed as a round knob, normally set to the "group control" position. If single control is required, it can be rotated to the corresponding device that needs to be controlled individually; 9-Power input port, connected to DC24V power supply, using standardized terminal block; 10- Overvoltage protection mark: mark the "overvoltage protection" mark near the device interface 3 to ensure that users understand the protection function; 11-digital potentiometer; MCU_GPIO1, MCU_GPIO2, and MCU_GPIO3 are all interfaces on the processor MCU; W-digital potentiometer output; MOSFET-field effect transistor; C1-capacitor 1. DETAILED DESCRIPTION

[0017] The present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are intended to explain the present application but the present application is not limited to the following examples.

[0018] See also Figures 1 to 5 The embodiment of the present application adopts a control device based on physical contact parallel connection, which realizes through signal recognition and distribution technology: a single control terminal triggers multiple device actions, real-time feedback of device status and abnormal alarm, and compatible collaborative control of devices with different voltage levels. The appearance of the control device is as follows: Figure 1 shown.

[0019] 1. The main structure of the control device: The control device of this application is mainly composed of the following modules, and its structural design is aimed at achieving efficient, stable and highly compatible control functions. The system architecture block diagram is shown in Figure 2 .

[0020] 1. Main control module Includes processor (MCU): responsible for receiving, parsing, and sending control signals, and is the core processing unit of the device; Signal acquisition unit: performs human-computer interaction and receives control signals from the human-computer interaction unit; Drive output unit: Outputs control signals to the controlled device according to the MCU's instructions, driving the device to perform the corresponding action. This unit contains a dynamic impedance matching circuit.

[0021] The dynamic impedance matching circuit adapts and improves the impedance matching technology commonly used in the communication field, using a digital potentiometer 11 and a metal oxide semiconductor field effect transistor (MOSFET) to form an adjustable resistance network to solve problems such as large instantaneous startup current of equipment and voltage attenuation of long-distance lines in engineering practice. The schematic diagram of the circuit principle is shown in the figure below. Figure 5 As shown, the dynamic impedance matching circuit includes a digital potentiometer 11, a field-effect transistor (MOSFET), and a capacitor C1. A processor (MCU) is connected to the digital potentiometer 11. The output terminal W of the digital potentiometer 11 is connected to the gate of the MOSFET. The source of the MOSFET is grounded via capacitor C1, and the drain of the MOSFET is connected to the parallel circuit via the parallel device interface 3. The MCU automatically identifies the connected device type, invokes a preset matching algorithm to dynamically adjust the impedance parameters, and sends a pulse signal to the digital potentiometer 11. The digital potentiometer's CS terminal (chip select, active low), INC terminal (increment control, falling edge triggered), and U / D terminal (direction control, resistance increases when high) receive the signal and adjust the output voltage at the W terminal accordingly. The digital potentiometer's W terminal is connected to the gate of the MOSFET, which is connected to the parallel circuit via the parallel device interface, thereby adjusting the load's on-resistance.

[0022] 2. Parallel device interface 3 a. Photoelectric isolation circuit, using existing photoelectric isolation technology to connect the control circuits of multiple devices, ensuring the stability and security of signal transmission. Each parallel device interface 3 supports multiple voltage levels (such as 24V, 220V, etc.) and is compatible with different types of devices; b. Protection circuit: Use existing overcurrent / overvoltage protection circuit to prevent equipment damage caused by overcurrent or overvoltage; c. The status feedback circuit collects electrical parameters (such as voltage and current) of each branch in real time and feeds this data back to the main control module. When an anomaly (such as overcurrent or short circuit) is detected, an alarm is triggered and the faulty node is automatically bypassed to ensure continued system operation.

[0023] 3. Human-computer interaction unit The human-computer interaction unit is integrated into the device, and its core lies in the following three aspects: a. Mode selection knob: supports switching between single control (controlling a device individually) and group control (controlling multiple devices at the same time).

[0024] b. Equipment status indicator: displays the working status of the controlled corresponding equipment in real time (such as running, stopping, fault, etc.).

[0025] c. Start / Emergency Stop Button: This button is a dual-purpose start / emergency stop state conversion button. Pressing it in the start state will perform an emergency stop, cutting off the control signals of all devices with one click to ensure safety; pressing it in the initial state or emergency stop state will perform a start signal.

[0026] 4. Power supply circuit The power supply circuit includes the main power supply and the isolated power supply, which supplies power to the main control module, the human-machine interaction unit, and the parallel device interface circuit.

[0027] Among them, the parallel device interface and power supply circuit are existing technologies.

[0028] 2. Control Methods The core of the control method is to achieve precise control of multiple devices through signal recognition, distribution and dynamic adjustment. The specific steps are as follows: Figure 3 As shown: S0. System initialization, loading device address mapping table and electrical parameter thresholds; S1. Monitor control signal (start / emergency stop button pressed / remote command): When the signal is valid, execute steps S2-S5. If the signal is invalid, return to the monitoring state.

[0029] S2. Signal identification: Read the voltage / current characteristics through the state feedback circuit and match the preset signal type (such as 12V pulse / 24V normally open).

[0030] S3. Detect the mode selection knob and send a drive signal according to the device pointed by the mode selection knob: S3a. Group control mode: Enables preset linkage logic to control the actions of each device (e.g., "sequential control": controls the actions of each device in sequence according to a preset sequence; "zoning control": groups devices according to their area, and all devices in the same group operate simultaneously); S3b single control mode: According to the mode selector knob pointed to the device read the device address; S4. Dynamic impedance matching: Real-time monitoring of the total impedance of the parallel circuit, adjusting the output stage resistor network to keep the signal attenuation <5%; S5. Feedback and troubleshooting: The current / voltage of each branch where the device is located is collected and compared with the threshold value of the branch: 1. If normal (for example, the deviation is no more than 10%), the branch status indicator will be displayed green; 2. If abnormal (for example, the deviation is greater than 30%), the branch status indicator will be displayed red and the branch will be disconnected to prevent the problem in the branch from affecting other branches; 3. If the current / voltage is between normal and abnormal (for example, the deviation is greater than 10% but less than 30%), the branch status indicator will be displayed yellow. Return to the monitoring state (go to step S1).

[0031] The following takes the fire shutter group control system as an example to explain the practical application of this application in detail. The timing diagram of the group control mode is as follows: Figure 4 shown.

[0032] 1. Device connection Connect the "down" contacts of 4 fire shutter control boxes in parallel to this control device.

[0033] 2. Control mode selection Single control mode: users can control the raising and lowering of a fire shutter individually through the start / emergency stop button; Group Control Mode: Set to "Sequential Control" mode. When the Start / Emergency Stop button is pressed, adjacent devices will start in sequence according to the preset sequence. For example, after pressing the Start / Emergency Stop button, device 1 will descend first. After a delay of ΔT seconds (200ms), device 2 will descend, and so on until all devices have moved to the descending position.

[0034] 3. Status monitoring and alarm The current in each device branch is monitored in real time. When normal operation is normal, the corresponding device status indicator is green. If a current abnormality (such as overcurrent or stall) is detected in a branch (for example, the branch where device 3 resides), the device status indicator for that branch triggers an audible and visual alarm based on the actual situation. Red indicates a fault, and yellow indicates a warning. The main control module automatically bypasses the faulty node (the branch where device 3 resides), ensuring continued operation of other devices.

Claims

1. A one-to-many control device for civil construction equipment, comprising a main control module, a parallel device interface, a human-machine interface unit, and a power supply circuit, wherein the power supply circuit is connected to the main control module, and the parallel device interface is connected to the parallel device branches via a parallel loop, characterized in that: The main control module includes a processor, a signal acquisition unit, and a drive output unit. The processor receives the control signal from the human-computer interaction unit and the device branch signal fed back from the parallel device interface through the signal acquisition unit. The drive output unit is provided with a dynamic impedance matching circuit. The dynamic impedance matching circuit includes a digital potentiometer, a field-effect transistor, and capacitor 1. The processor is connected to the digital potentiometer, the output end of the digital potentiometer is connected to the gate of the field-effect transistor, the source of the field-effect transistor is grounded through capacitor 1, and the drain of the field-effect transistor is connected to the parallel loop through the parallel device interface. The processor dynamically adjusts the impedance parameters by calling a preset matching algorithm. The processor monitors and displays the working status of each device branch in the parallel loop through a state feedback circuit.

2. The one-to-many control device for civil construction equipment according to claim 1, characterized in that: The human-computer interaction unit includes a mode selection knob, a start / emergency stop button, and an equipment status indicator light. The mode selection knob and the start / emergency stop button are connected to the processor through a signal acquisition unit, and the equipment status indicator light is connected to the processor through a drive output unit.

3. The one-to-many control device for civil construction equipment according to claim 1, characterized in that: The parallel device interface includes a photoelectric isolation circuit, a protection circuit, and a state feedback circuit. The processor is connected to each device branch through the photoelectric isolation circuit. The state feedback circuit collects electrical parameters of each device branch in real time and feeds them back to the processor through the protection circuit and the signal acquisition unit.

4. The one-to-many control device for civil construction equipment according to claim 1, characterized in that: The parallel circuits are connected to each device branch through a switch; when the working status of a device branch is within the normal range compared with the threshold, the processor displays the device branch status indicator light as green through the human-computer interaction unit; when the working status of a device branch is abnormal compared with the threshold, the processor displays the device branch status indicator light as red through the human-computer interaction unit and disconnects the device branch through the switch; when the working status of a device branch is between normal and abnormal compared with the threshold, the processor displays the device branch status indicator light as yellow through the human-computer interaction unit.

5. A one-to-many control method for civil construction equipment, the one-to-many control method for civil construction equipment is characterized by The following steps are involved: S0. System initialization, loading device address mapping table and electrical parameter thresholds; S1. Monitor control signal (start / emergency stop button pressed / remote command): When the signal is valid, execute steps S2-S5; if the signal is invalid, return to the monitoring state; S2. Signal identification: Read the voltage / current characteristics through the state feedback circuit and match the preset signal type; S3. Detect the mode selection knob and send a drive signal according to the device pointed by the mode selection knob: S3a. Group control mode: Enable preset linkage logic to control the actions of each device or control the actions of each device in sequence according to the preset timing; S3b single control mode: According to the mode selector knob pointed to the device read the device address; S4. Dynamic impedance matching: Real-time monitoring of the total impedance of the LAN, adjustment of the output stage resistor network, and keeping the signal attenuation less than 5%; S5. Feedback and troubleshooting: The current / voltage of each device branch is collected and compared with the corresponding branch threshold. If normal, the device branch status indicator will turn green. If abnormal, the device branch status indicator will turn red and the device branch will be disconnected. If the current / voltage is between normal and abnormal, the device branch status indicator will turn yellow. Go to step S1.

6. The one-to-many control method for civil construction equipment according to claim 5, characterized in that: The one-to-many control device for civil construction equipment is used to achieve this.

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