CN103426271A - Electrical fire monitor unit with pulse metering and implementation method thereof - Google Patents

Abstract

The present invention provides an electrical fire monitor with pulse metering and its implementation method. The electrical fire monitor includes a residual current sampling unit, a temperature sampling unit, a three-phase voltage sampling unit, and a three-phase current sampling unit. Sampling unit, 4-way sampling signal filter unit, 3-way pulse input unit, 3-way pulse output unit, processor, display, memory, indicator light, key unit, RS485 serial communication unit, external clock unit and power supply unit. The electrical fire monitor with pulse metering and its implementation method of the present invention can not only collect data related to electrical fire parameters, but also measure various energy parameters in the form of pulse metering, which enriches the functions of the electrical fire monitor and The device structure is simplified to meet the various needs of users.

Description

An electrical fire monitor with pulse metering and its realization method

technical field

The invention relates to the field of electrical fire monitoring, in particular to an electrical fire monitor with pulse metering and a realization method thereof.

Background technique

With the gradual deepening of society's understanding of electrical fire prevention, as well as the support of laws and regulations and the vigorous promotion of fire management departments, the use of electrical fire monitors is increasing. Most of the electrical fire monitors in the prior art have relatively simple functions, such as measuring the residual current of the detected electrical circuit and the cable temperature of the detected electrical circuit, resulting in a low integration level of the electrical fire monitor, making it difficult to expand its application noodle. Preferably, some electrical fire monitors can measure 1 channel of residual current and 4 channels of temperature monitoring. It also appears powerless and difficult to meet all needs. Moreover, in some occasions, it is necessary to measure both electrical parameters and the function of electrical fire monitoring. In the prior art, a single electrical fire monitor is packaged together with power monitoring instruments and electrical parameter measuring instruments. The size of the final product is very large, which leads to the increase of the corresponding switchgear, which is not conducive to the transformation and upgrading of the old system. At the same time, because the final product is installed inside the switchgear, it is not convenient for the staff to check the working status and operate.

Therefore, there is a need for a multi-functional electrical fire monitor that meets various demands, taking into account the functions of electrical fire monitoring and electrical parameter measurement. In addition, in addition to electric energy, other types of energy consumption also need to be collected, such as water, gas, etc., which are common energy sources that are easily consumed. At present, the information transmission mode of most electricity meters, water meters and gas meters is pulse output, which is not suitable for the direct collection needs of electrical fire monitors, so it is difficult to integrate non-electric energy consumption information into electrical fire monitors. The existing pulse collector is a product developed for the old-fashioned mechanical watt-hour meter, which completes the digital conversion of electrical energy pulses to electrical degrees, but cannot convert water volume, gas volume, etc. into corresponding digital equivalents.

Contents of the invention

The problem solved by the present invention is that in the existing electrical fire monitor, due to the single function, it cannot meet the needs of users in various aspects, or although it is compatible with the functions of electrical fire parameter collection and energy consumption information collection, the system structure is complicated and difficult to monitor. Management and maintenance, resulting in inconvenience to users.

In order to achieve the above object, the present invention provides an electrical fire monitor with pulse metering, which includes a residual current sampling unit, a temperature sampling unit, a three-phase voltage sampling unit, a three-phase current sampling unit, 4 channels Sampling signal filtering unit, 3-way pulse input unit, 3-way pulse output unit, processor, display, memory, indicator light, key unit, RS485 serial communication unit, external clock unit and power supply unit; the residual current sampling unit is used To collect the residual current of the detected electrical circuit, the temperature sampling unit is used to collect the cable temperature of the detected electrical circuit, the three-phase voltage sampling unit is used to collect the three-phase voltage of the detected electrical circuit, and the three-phase current The sampling unit is used to collect the three-phase current of the detected electrical circuit, and the residual current sampling unit, the temperature sampling unit, the three-phase voltage sampling unit and the three-phase current sampling unit are respectively connected to 4 sampling signal filtering units One of the sampling signal filtering units in the process, the processor is connected to the four sampling signal filtering units to receive the residual current, cable temperature, three-phase voltage and three-phase current after signal filtering, and based on the three-phase filtering unit after the signal filtering The phase voltage and three-phase current calculate the active power, reactive power, apparent power and power factor of the detected electrical circuit; the 3-way pulse input unit is respectively connected to an external electric meter, an external water meter and an external gas meter to receive pulse metering data respectively. Electricity consumption, water consumption and gas consumption, the processor connects the 3-way pulse input unit and converts the pulse metered electricity consumption, water consumption and gas consumption into digital metered electricity consumption, water consumption and gas consumption , the 3-way pulse output unit is connected to the processor to transmit the electricity consumption, water consumption and gas consumption measured by the pulse; the processor is connected to the display to display the active power and reactive power of the detected electrical circuit Power, apparent power and power factor and display the residual current after filtering the signal, cable temperature, three-phase voltage and three-phase current and display the electricity consumption, water consumption and gas consumption of the digital metering, the processor The memory is connected to store the active power, reactive power, apparent power and power factor of the detected electrical circuit and store the residual current after filtering the signal, cable temperature, three-phase voltage and three-phase current and store all The electricity consumption, water consumption and gas consumption of the digital metering, the processor is connected to the RS485 serial communication unit to serially send the active power, reactive power, apparent power and power factor of the detected electrical circuit And serially send the residual current, cable temperature, three-phase voltage and three-phase current after the signal filtering; the power supply unit is used to supply power for equipment other than the power supply unit in the electrical fire monitor, and the external The clock unit is used to provide the processor with the clock signal required for the processor to work, the indicator light is used to display the working status of the electrical fire monitor, and the key unit is used to receive user input to control the work of the processor.

Optionally, the electrical fire monitor also includes a network interface unit, connected to the processor, for sending the active power, reactive power, apparent power and power factor of the detected electrical circuit to the network and sending the The residual current, cable temperature, three-phase voltage and three-phase current after filtering the above signals.

Optionally, the key unit is a keyboard, and the display is a liquid crystal display or an LED display.

Optionally, the memory is one of RAM and Flash Memory.

In order to achieve the above object, the present invention also provides a method for implementing an electrical fire monitor with pulse metering, which is characterized in that it includes the following steps: Step 1: the residual current sampling unit and temperature sampling unit in the electrical fire monitor Unit, three-phase voltage sampling unit and three-phase current sampling unit respectively collect the residual current, cable temperature, three-phase voltage and three-phase current of the detected electrical circuit; step 2: filter the 4-way sampling signal in the electrical fire monitor The unit is respectively connected with the residual current sampling unit, the temperature sampling unit, the three-phase voltage sampling unit and the three-phase current sampling unit to measure the residual current, cable temperature and three-phase voltage of the detected electrical circuit. and three-phase current to perform signal filtering respectively; Step 3: The 3-way pulse input unit in the electrical fire monitor is respectively connected to an external electric meter, an external water meter and an external gas meter to respectively receive the electricity consumption, water consumption and consumption of pulse metering. Gas volume; Step 4: The processor in the electrical fire monitor connects the 4-way sampling signal filtering unit to receive the residual current, cable temperature, three-phase voltage and three-phase current after signal filtering, and based on the signal filtering The final three-phase voltage and three-phase current calculate the active power, reactive power, apparent power and power factor of the detected electrical circuit; Step 5: the processor connects the 3-way pulse input unit and uses the pulse metering Electricity, water consumption and gas consumption are converted into digital metered electricity consumption, water consumption and gas consumption, and the 3-way pulse output unit in the electrical fire monitor is connected to the processor to forward the pulse metered electricity consumption, Water consumption and gas consumption; step 6: the processor connects the display in the electrical fire monitor to display the active power, reactive power, apparent power and power factor of the detected electrical circuit and display the signal Filtered residual current, cable temperature, three-phase voltage and three-phase current, and display the digital metered electricity consumption, water consumption and gas consumption; Step 7: The processor connects the memory in the electrical fire monitor To store the active power, reactive power, apparent power and power factor of the detected electrical circuit, store the residual current after filtering the signal, cable temperature, three-phase voltage and three-phase current, and store the digital measurement Power consumption, water consumption and gas consumption; Step 8: the processor connects the RS485 serial communication unit in the electrical fire monitor to serially send the active power, reactive power, visual In power and power factor, the residual current, cable temperature, three-phase voltage and three-phase current after the signal filtering are sent in series; wherein, the electrical fire monitor also includes a power supply unit for monitoring the electrical fire The electrical fire monitor also includes an external clock unit for providing the processor with a clock signal required for the processor to work, and the electrical fire monitor also includes The indicator light is used to display the working status of the electrical fire monitor, and the electrical fire monitor also includes a key unit for receiving user input to control the processor work.

Optionally, after step 8, step 9 is also included: the processor connects the network interface unit in the electrical fire monitor to send the active power, reactive power, apparent power and power factor and send the residual current, cable temperature, three-phase voltage and three-phase current after filtering the signal through the network.

Optionally, the key unit is a keyboard, and the display is a liquid crystal display or an LED display.

Optionally, the memory is one of RAM and Flash Memory.

The present invention has the following advantages due to the adoption of the above-mentioned technical scheme: the electrical fire monitor with pulse metering and its implementation method of the present invention have transformed the electrical fire monitor with a single collection mode and its implementation method in the prior art, so that The electrical fire monitor can not only collect the residual current, cable temperature, three-phase voltage and three-phase current of the detected electrical circuit, but also further calculate the active power, reactive power, apparent power and power factor of the detected electrical circuit, so as to carry out Electrical fire early warning, and compatible with energy collection functions in various pulse metering forms, converting pulse metering into numerical metering, which facilitates timely understanding of the electricity consumption, water consumption and gas consumption consumed by users. The present invention deletes equipment structure redundancy, Cater to the various collection needs of users.

Description of drawings

Fig. 1 is the system structural representation of a kind of electrical fire monitor with pulse metering of the present invention;

Fig. 2 is a flow chart of a method for implementing an electrical fire monitor with pulse metering in the present invention.

Detailed ways

The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. First, please refer to Fig. 1. Fig. 1 is a schematic diagram of the system structure of an electrical fire monitor with pulse metering according to the present invention. The electrical fire monitor with pulse metering includes a residual current sampling unit 1, a temperature sampling unit 2, three Phase voltage sampling unit 3, three-phase current sampling unit 4, 4-way sampling signal filter unit 5, 3-way pulse input unit 6, 3-way pulse output unit 12, processor 7, display 8, memory 9, indicator light 16, keys Unit 15, RS485 serial communication unit 10, external clock unit 14 and power supply unit 13; the residual current sampling unit 1 is used to collect the residual current of the detected electrical circuit, and the temperature sampling unit 2 is used to collect the detected electrical circuit cable temperature, the three-phase voltage sampling unit 3 is used to collect the three-phase voltage of the detected electrical circuit, the three-phase current sampling unit 4 is used to collect the three-phase current of the detected electrical circuit, and the residual current sampling unit 1. The temperature sampling unit 2, the three-phase voltage sampling unit 3 and the three-phase current sampling unit 4 are respectively connected to one of the four sampling signal filtering units 5, and the processor 7 is connected to all The 4-way sampling signal filter unit 5 receives the residual current, cable temperature, three-phase voltage and three-phase current after signal filtering, and calculates the active power of the detected electrical circuit based on the three-phase voltage and three-phase current after the signal filtering power, reactive power, apparent power and power factor; the 3-way pulse input unit 6 is respectively connected to an external electric meter, an external water meter and an external gas meter to respectively receive the electricity consumption, water consumption and gas consumption measured by pulses, and the The processor 7 is connected to the 3-way pulse input unit 6 and converts the pulse metered electricity consumption, water consumption and gas consumption into digital metered electricity consumption, water consumption and gas consumption, and the 3-way pulse output unit 12 is connected to The processor 7 uses the power consumption, water consumption and gas consumption measured by the forwarding pulse; the processor 7 is connected to the display 8 to display the active power, reactive power, apparent power and Power factor and display the residual current after filtering the signal, cable temperature, three-phase voltage and three-phase current and display the electricity consumption, water consumption and gas consumption of the digital metering, the processor 7 is connected to the memory 9 To store the active power, reactive power, apparent power and power factor of the detected electrical circuit, store the residual current after filtering the signal, cable temperature, three-phase voltage and three-phase current, and store the digital measurement Power consumption, water consumption and gas consumption, the processor 7 is connected to the RS485 serial communication unit 10 to serially transmit the active power, reactive power, apparent power and power factor of the detected electrical circuit in parallel Send the residual current, cable temperature, three-phase voltage and three-phase current after the signal filtering; the power supply unit 13 is used to supply power for equipment other than the power supply unit 13 in the electrical fire monitor, and the external The clock unit 14 is used to provide the clock signal required for the processor 7 to work for the processor 7, and the indicator light 16 is used to display the working status of the electrical fire monitor. In the operating state, the key unit 15 is used to receive user input to control the operation of the processor 7 . The electrical fire monitor also includes a network interface unit 11, connected to the processor 7, for sending the active power, reactive power, apparent power and power factor of the detected electric circuit through the network and sending the signal through the network Filtered residual current, cable temperature, three-phase voltage and three-phase current. Wherein, the network interface unit 11 uses the TCPIP protocol to send network data.

In addition, the RS485 serial communication unit 10 is used to form a half-duplex communication network. In the wiring, it is generally a two-wire system (there was a four-wire connection method in the past, which can only realize point-to-point communication, which is rarely used now). Shielded twisted pair is mostly used for transmission. This wiring method is a bus topology, and a maximum of 32 nodes can be connected on the same bus. In the RS485 communication network, the master-slave communication mode is generally adopted, that is, one master has multiple slaves. In many cases, when connecting the RS-485 communication link, simply connect the "A" and "B" ends of each interface with a pair of twisted pairs. The RS485 interface connector adopts DB-9 9-pin plug socket, the RS485 interface with the intelligent terminal adopts DB-9 (hole), and the keyboard interface RS485 connected with the keyboard adopts DB-9 (pin).

Wherein, the key unit 15 is a keyboard, and the display 8 is a liquid crystal display or an LED display. Among them, the excellent characteristics of liquid crystal display devices determine its status in various display devices. As a special functional material, liquid crystal has extremely wide application value. Only 20 years of liquid crystal display has changed hundreds of years of clock timing industry, electronic calculators have become necessary for everyone, and intelligent instruments and meters use liquid crystal display, making it portable. The popularity of high-performance embedded portable devices puts forward new requirements for the design of embedded display systems: high performance, low power consumption, small size, portability and ability to work in various lighting environments. The development of display systems for portable devices provides a solution that not only meets the high performance required by high-end embedded devices, but also maintains low power consumption under high-brightness display conditions. It is suitable for high-end PDAs, portable media players, In handheld navigators, portable medical and test equipment and other mobile terminals.

Wherein, described memory 9 is a kind of in random access memory RAM, flash memory Flash Memory.

Next, please refer to FIG. 2 . FIG. 2 is a flow chart of a method for implementing an electrical fire monitor with pulse metering according to the present invention. What the arrow in Fig. 2 shows is the direction of working process, as can be seen from Fig. 2, described electrical fire monitor implementation method with pulse metering comprises the following steps:

Step 201: The residual current sampling unit, temperature sampling unit, three-phase voltage sampling unit and three-phase current sampling unit in the electrical fire monitor respectively collect the residual current, cable temperature, three-phase voltage and three-phase current;

Step 202: The 4 sampling signal filter units in the electrical fire monitor are respectively connected to the residual current sampling unit, the temperature sampling unit, the three-phase voltage sampling unit and the three-phase current sampling unit to The residual current, cable temperature, three-phase voltage and three-phase current of the detected electrical circuit are respectively subjected to signal filtering;

Step 203: The 3-way pulse input unit in the electrical fire monitor is respectively connected to an external electric meter, an external water meter and an external gas meter to respectively receive the electricity consumption, water consumption and gas consumption measured by the pulse;

Step 204: The processor in the electrical fire monitor is connected to the 4-way sampling signal filtering unit to receive the residual current, cable temperature, three-phase voltage and three-phase current after signal filtering, and based on the filtered signal Three-phase voltage and three-phase current calculate the active power, reactive power, apparent power and power factor of the detected electrical circuit;

Step 205: The processor is connected to the 3-way pulse input unit and converts the pulse metered electricity consumption, water consumption and gas consumption into digital metered electricity consumption, water consumption and gas consumption, and the electrical fire monitor The 3-way pulse output unit is connected to the processor to transmit the electricity consumption, water consumption and gas consumption measured by the pulse;

Step 206: The processor is connected to the display in the electrical fire monitor to display the active power, reactive power, apparent power and power factor of the detected electrical circuit and display the residual current after filtering the signal, Cable temperature, three-phase voltage and three-phase current, as well as displaying the electricity consumption, water consumption and gas consumption of said digital meter;

Step 207: The processor is connected to the memory in the electrical fire monitor to store the active power, reactive power, apparent power and power factor of the detected electrical circuit and store the residual current after filtering the signal, Cable temperature, three-phase voltage and three-phase current, as well as storing the electricity consumption, water consumption and gas consumption of said digital meter;

Step 208: The processor connects the RS485 serial communication unit in the electrical fire monitor to serially transmit the active power, reactive power, apparent power and power factor of the detected electrical circuit and transmit the The residual current, cable temperature, three-phase voltage and three-phase current after filtering the above signals;

Step 209: The processor is connected to the network interface unit in the electrical fire monitor to send the active power, reactive power, apparent power and power factor of the detected electrical circuit through the network and send the filtered signal to the network The residual current, cable temperature, three-phase voltage and three-phase current.

Wherein, the electrical fire monitor also includes a power supply unit for supplying power to devices in the electrical fire monitor other than the power supply unit, and the electrical fire monitor also includes an external clock unit for the processing The controller provides the clock signal required for the processor to work. The electrical fire monitor also includes an indicator light for displaying the working status of the electrical fire monitor. The electrical fire monitor also includes a key unit for User input is received to control the operation of the processor.

Wherein, the key unit is a keyboard, and the display is a liquid crystal display or an LED display.

Wherein, described memory is a kind of in random access memory RAM, flash memory Flash Memory.

Although the present invention has been disclosed above with preferred embodiments, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so the protection scope of the present invention should be based on the scope defined in the claims.

Claims (8)

1. the electrical fire monitor of tape pulse metering is characterized in that:

Described electrical fire monitor comprises residual current sampling unit, temperature sampling unit, three-phase voltage sampling unit, three-phase current sampling unit, 4 tunnel sampled signal filter units, 3 tunnel pulse input blocks, 3 tunnel pulse output units, processor, display, storer, pilot lamp, push-button unit, RS485 serial communication unit, external clock unit and power supply unit;

Described residual current sampling unit is for gathering the residual current of detected electric wiring, described temperature sampling unit is for gathering the cable temperature of detected electric wiring, described three-phase voltage sampling unit is for gathering the three-phase voltage of detected electric wiring, described three-phase current sampling unit is for gathering the three-phase current of detected electric wiring, described residual current sampling unit, described temperature sampling unit, described three-phase voltage sampling unit is connected respectively 4 tunnel sampled signal filter unit Zhong De mono-tunnel sampled signal filter units with described three-phase current sampling unit, described processor connects described 4 tunnel sampled signal filter units to receive the residual current after signal filtering, cable temperature, three-phase voltage and three-phase current, and the active power of the three-phase voltage based on after described signal filtering and the detected electric wiring of three-phase current calculating, reactive power, applied power and power factor,

Described 3 tunnel pulse input blocks connect respectively outside ammeter, outside water meter and outside gas meter power consumption, water consumption and the gas consumption with received pulse metering respectively, described processor connects described 3 tunnel pulse input blocks and the power consumption of pulse measurement, water consumption and gas consumption is converted to power consumption, water consumption and the gas consumption of digital metering, and described 3 tunnel pulse output units connect described processor to forward power consumption, water consumption and the gas consumption of pulse measurement;

Described processor connects described display to show the active power of described detected electric wiring, reactive power, applied power and power factor and show described signal filtering after residual current, cable temperature, three-phase voltage and three-phase current and the power consumption that shows described digital metering, water consumption and gas consumption, described processor connects described storer to store the active power of described detected electric wiring, reactive power, applied power and power factor and store described signal filtering after residual current, cable temperature, three-phase voltage and three-phase current and the power consumption of storing described digital metering, water consumption and gas consumption, described processor connects described RS485 serial communication unit and sends the active power of described detected electric wiring with serial, reactive power, applied power and power factor parallel series send the residual current after described signal filtering, cable temperature, three-phase voltage and three-phase current,

Described power supply unit is used to the power supply of the equipment except power supply unit in described electrical fire monitor, described external clock unit is used to described processor to provide described processor work required clock signal, described pilot lamp is for showing the duty of described electrical fire monitor, and described push-button unit is for receiving user's input to control the work of described processor.

2. electrical fire monitor according to claim 1, it is characterized in that, described electrical fire monitor also comprises: network interface unit, connect described processor, for network, send residual current, cable temperature, three-phase voltage and the three-phase current after active power, reactive power, applied power and the power factor of described detected electric wiring network send described signal filtering.

3. electrical fire monitor according to claim 1, it is characterized in that: described push-button unit is keyboard, described display is liquid crystal display or light-emitting diode display.

4. electrical fire monitor according to claim 1 is characterized in that: described storer is a kind of in random access memory ram, flash memory Flash Memory.

5. the implementation method of the electrical fire monitor of a tape pulse metering, is characterized in that, comprises the following steps:

Step 1: the residual current sampling unit in described electrical fire monitor, temperature sampling unit, three-phase voltage sampling unit and three-phase current sampling unit gather respectively residual current, cable temperature, three-phase voltage and the three-phase current of detected electric wiring;

Step 2: 4 tunnel sampled signal filter units in described electrical fire monitor are connected with the residual current to described detected electric wiring, cable temperature, three-phase voltage and three-phase current and carry out respectively signal filtering with described three-phase current sampling unit with described residual current sampling unit, described temperature sampling unit, described three-phase voltage sampling unit respectively;

Step 3: 3 tunnel pulse input blocks in described electrical fire monitor connect respectively outside ammeter, outside water meter and outside gas meter power consumption, water consumption and the gas consumption with received pulse metering respectively;

Step 4: the processor in described electrical fire monitor connects described 4 tunnel sampled signal filter units to receive residual current, cable temperature, three-phase voltage and the three-phase current after signal filtering, and the three-phase voltage based on after described signal filtering and three-phase current calculate active power, reactive power, applied power and the power factor of detected electric wiring;

Step 5: described processor connects described 3 tunnel pulse input blocks and the power consumption of pulse measurement, water consumption and gas consumption is converted to power consumption, water consumption and the gas consumption of digital metering, and 3 tunnel pulse output units in described electrical fire monitor connect described processor to forward power consumption, water consumption and the gas consumption of pulse measurement;

Step 6: described processor connects display in described electrical fire monitor with the active power, reactive power, applied power and the power factor that show described detected electric wiring and residual current, cable temperature, three-phase voltage and three-phase current after showing described signal filtering and power consumption, water consumption and the gas consumption that shows described digital metering;

Step 7: described processor connects storer in described electrical fire monitor with active power, reactive power, applied power and the power factor of storing described detected electric wiring and residual current, cable temperature, three-phase voltage and three-phase current after storing described signal filtering and power consumption, water consumption and the gas consumption of storing described digital metering;

Step 8: described processor connects residual current, cable temperature, three-phase voltage and the three-phase current after active power, reactive power, applied power and power factor parallel series that RS485 serial communication unit in described electrical fire monitor sends described detected electric wiring with serial send described signal filtering;

Wherein, described electrical fire monitor also comprises power supply unit, be used to the power supply of the equipment except power supply unit in described electrical fire monitor, described electrical fire monitor also comprises the external clock unit, be used to described processor to provide described processor work required clock signal, described electrical fire monitor also comprises pilot lamp, for showing the duty of described electrical fire monitor, described electrical fire monitor also comprises push-button unit, for the input that receives the user to control the work of described processor.

6. the implementation method of electrical fire monitor according to claim 5, it is characterized in that, also comprise step 9 after step 8: described processor connects network interface unit in described electrical fire monitor and sends residual current, cable temperature, three-phase voltage and the three-phase current after active power, reactive power, applied power and the power factor of described detected electric wiring network send described signal filtering with network.

7. the implementation method of electrical fire monitor according to claim 5, it is characterized in that: described push-button unit is keyboard, described display is liquid crystal display or light-emitting diode display.

8. the implementation method of electrical fire monitor according to claim 5 is characterized in that: described storer is a kind of in random access memory ram, flash memory Flash Memory.

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