Measurement and control device

Abstract

The utility model discloses a measurement and control device, which comprises a CPU module, an AC module, a DC module, an input module, an output module, an HMI module and a power supply module, and is characterized in that the power supply module is used for providing a 5V power supply for the CPU module, the AC module, the DC module, the HMI module, the input module and the output module; the output end of the direct current module is connected with the input end of the alternating current module; and the HMI module is connected with the CPU module through a fast communication bus. According to the measurement and control device provided by the utility model, a processor architecture of FPGA + ARM is adopted, and a modularization and bus design scheme is adopted, so that a good solution is provided for different application scenes of the measurement and control device; moreover, each module is high in integration level, supports a large amount of input, output and analog acquisition data, and can reduce the number of used plug-ins. The device can be connected with an on-line monitoring system or a plant station monitoring system through an Ethernet interface or an RS485 interface to complete the monitoring function of power equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of measurement and control in a monitoring system, in particular to a measurement and control device. Background Art

[0002] The information collection, data processing and control unit of the plant computer monitoring system follows the DL / T860 standard and supports analog quantity sampling, digital quantity sampling, AC electrical quantity collection, switch quantity collection, control output, anti-mistake locking, equipment status online monitoring and other functions. The measurement and control device is divided into digital measurement and control device and analog measurement and control device according to the different AC electrical quantity sampling, switch quantity collection and control output methods.

[0003] The measurement and control devices include digital sampling, digital tripping, conventional sampling, digital tripping, conventional sampling, conventional tripping, etc. According to the usage scenario, they can be divided into interval measurement and control, busbar measurement and control, and public measurement and control. The existing measurement and control devices have different access analog and switch data, too many plug-in designs, and low versatility. Utility Model Content

[0004] The purpose of the utility model is to provide a measurement and control device for solving the above problems.

[0005] In order to achieve the above object, the utility model provides the following technical solution: a measurement and control device, including a CPU module, an AC module, a DC module, an input module, an output module, an HMI module and a power module, wherein:

[0006] The power supply module is used to provide 5V power to the CPU module, AC module, DC module, HMI module, input module and output module;

[0007] The output end of the DC module is connected to the input end of the AC module;

[0008] The HMI module is connected to the CPU module via a fast communication bus;

[0009] The input module and the output module are connected to the CPU module data via a slow communication bus;

[0010] The AC module is connected to the CPU module via SPI bus data.

[0011] Preferably, the CPU module consists of an FPGA and two ARM cores;

[0012] The CPU module includes 3 Ethernet interfaces, 4 RS485 / RS232 communication interfaces, 1 RS485 debugging interface and a B code timing interface.

[0013] Preferably, the AC module comprises 16-channel voltage / current acquisition circuits, a low-pass filter and an analog-to-digital conversion module, wherein: the 16-channel voltage / current acquisition circuits are used to collect AC voltage and current signals.

[0014] Preferably, the AC module supports a maximum of 16 channels of AC sampling.

[0015] Preferably, the DC module includes a DC acquisition circuit, the output end of the DC acquisition circuit is connected to the input end of the analog-to-digital converter, and the DC acquisition circuit supports a maximum of 8-channel DC sampling and supports 0-5V, 4-20mA signal measurement.

[0016] Preferably, the power supply module is composed of a power supply module and a power failure alarm signal output relay.

[0017] Preferably, the output module consists of a drive motor and an output relay.

[0018] In the above technical scheme, a measurement and control device provided by the utility model has the following beneficial effects: different plug-ins can be selected according to different application scenarios, the CPU module adopts the architecture of FPGA+ARM core, wherein FPGA is used to process sampling, timing, serial communication, network communication and other functions, and high-speed transmission data is exchanged through a fast communication bus, and data with less information is exchanged through a slow communication bus. The design schemes of different communication buses are used to meet the requirements of different communication rates, and the plug-ins adopt a universal design to reduce the types of plug-ins. The design scheme considers the compatibility and combination of digital sampling and traditional sampling, traditional tripping and GOOSE tripping, and improves the versatility of product design. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 A module architecture diagram provided for an embodiment of the utility model. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0022] like Figure 1 As shown, a measurement and control device includes a CPU module, an AC module, a DC module, an input module, an output module, an HMI module and a power module, wherein:

[0023] The power module is used to provide 5V power to the CPU module, AC module, DC module, HMI module, input module and output module;

[0024] The output terminal of the DC module is connected to the input terminal of the analog-to-digital converter;

[0025] The HMI module is connected to the CPU module via a fast communication bus;

[0026] The input module and the output module are connected to the CPU module data via a slow communication bus;

[0027] The AC module is connected to the CPU module via SPI bus data.

[0028] As an embodiment further provided by the present invention, the CPU module is composed of an FPGA and two ARM cores;

[0029] The CPU module includes 3 Ethernet interfaces, 4 RS485 / RS232 communication interfaces, 1 RS485 debugging interface and B code timing interface. Among them, the 3 Ethernet interfaces can provide external Ethernet communication, and the 4 RS485 / RS232 communication interfaces support RS485 bus networking.

[0030] The HMI module can be used to view the device parameters, set values, events, alarms and operation records on-site. It consists of 6 indicator lights, 9 buttons and LCD.

[0031] As another embodiment further provided by the present invention, the AC module includes 16-channel voltage / current acquisition circuits, a low-pass filter and an analog-to-digital conversion module, wherein: the 16-channel voltage / current acquisition circuits are used to collect AC voltage and current signals.

[0032] As another embodiment further provided by the present invention, the DC module includes a DC acquisition circuit, the output end of the DC acquisition circuit is connected to the input end of the analog-to-digital conversion, and the above-mentioned DC acquisition circuit supports a maximum of 8-channel DC sampling and supports 0-5V, 4-20mA signal measurement.

[0033] As another embodiment further provided by the present invention, the power supply module is composed of a power supply module and a power failure alarm signal output relay.

[0034] As another embodiment further provided by the present invention, the output module is composed of a driving motor and an output relay. The circuit has a return-to-calibration design, and each module supports a maximum of 14 outputs.

[0035] Secondly, the input module in the above embodiment adopts optocoupler isolation input, the acquisition method adopts a combination of resistor current limiting and resistor voltage division, and a TVS tube is used to perform surge protection on the entire circuit to improve the anti-interference ability of the circuit. Each module supports a maximum of 27 inputs.

[0036] Working principle: The switch input signal is photoelectrically isolated through the input module, and then the status information is sent to the programmable logic module (FPGA) of the CPU module via the slow communication bus; the analog signal is isolated and converted through the AC module and sent to the analog-to-digital conversion module, and the converted sampled data is sent to the programmable logic module (FPGA) of the CPU module. The programmable logic module (FPGA) completes the synchronous sampling of analog and input quantities, and then notifies the ARM core to read the data in an interrupt mode. After receiving the sampled data, ARM1 performs logical processing, calculates the phase voltage, line voltage, zero-sequence voltage, and current effective value, and calculates electrical quantities such as active power, reactive power, power factor, frequency, and harmonics; through the changes in the input quantity, the remote signaling events are recorded in sequence, and each input can independently set the confirmation time of the remote signaling. AMR2 has the function of external communication, and can receive remote control commands from a distance through the network port, remotely control the circuit breaker, disconnector, and grounding switch, and adjust the transformer gear.

[0037] The device has a synchronization check function. When receiving a synchronization check and closing command, ARM1 monitors the frequency difference, pressure difference and angle difference of the synchronization parameters in real time in each sampling cycle during the synchronization check period. When the synchronization closing conditions are met, ARM1 sends a remote control command, which reaches the output module through the slow bus. The output module output relay is closed and a synchronization closing signal is sent out.

[0038] The 6 indicator lights of the HMI module are "Run", "Alarm", "Maintenance", "Time Error", "Local Status" and "Unlock", which are used to indicate the current status of the device. The 9 buttons are "Up", "Down", "Left", "Right", "Confirm", "Cancel", "Add", "Subtract" and a spare.

[0039] The electrical quantities, harmonics and other information collected by the current device can be viewed through the LCD. The HMI LCD has the function of displaying the main wiring diagram, and the switch can be remotely controlled through the main wiring diagram.

[0040] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A measurement and control device, characterized in that: It includes CPU module, AC module, DC module, input module, output module, HMI module and power supply module, among which: The power supply module is used to provide 5V power to the CPU module, AC module, DC module, HMI module, input module and output module; The output end of the DC module is connected to the input end of the AC module; The HMI module is connected to the CPU module via a fast communication bus; The input module and the output module are connected to the CPU module data via a slow communication bus; The AC module is connected to the CPU module via SPI bus data.

2. A measurement and control device according to claim 1, characterized in that: The CPU module consists of FPGA and two ARM cores; The CPU module includes 3 Ethernet interfaces, 4 RS485 / RS232 communication interfaces, 1 RS485 debugging interface and a B code timing interface.

3. A measurement and control device according to claim 1, characterized in that: The AC module includes 16-channel voltage / current acquisition loops, a low-pass filter and an analog-to-digital conversion module, wherein: the 16-channel voltage / current acquisition loops are used to collect AC voltage and current signals.

4. A measurement and control device according to claim 3, characterized in that: The AC module supports a maximum of 16 channels of AC sampling.

5. A measurement and control device according to claim 1, characterized in that: The DC module includes a DC acquisition circuit, the output end of the DC acquisition circuit is connected to the input end of the analog-to-digital conversion, and the DC acquisition circuit supports a maximum of 8-channel DC sampling and supports 0-5V, 4-20mA signal measurement.

6. A measurement and control device according to claim 1, characterized in that: The power supply module is composed of a power supply module and a power failure alarm signal output relay.

7. A measurement and control device according to claim 1, characterized in that: The output module is composed of a driving motor and an output relay.

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