CN210957918U - Intelligent constant display power monitoring device - Google Patents

Intelligent constant display power monitoring device Download PDF

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Publication number
CN210957918U
CN210957918U CN201922448199.5U CN201922448199U CN210957918U CN 210957918 U CN210957918 U CN 210957918U CN 201922448199 U CN201922448199 U CN 201922448199U CN 210957918 U CN210957918 U CN 210957918U
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power
module
power supply
monitoring device
control mcu
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秦建息
奉振锋
莫景莲
秦威
任定芳
周明
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GUILIN HIVISION TECHNOLOGY CO LTD
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GUILIN HIVISION TECHNOLOGY CO LTD
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/12—Energy storage units, uninterruptible power supply [UPS] systems or standby or emergency generators, e.g. in the last power distribution stages
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/248—UPS systems or standby or emergency generators

Abstract

The utility model discloses an intelligent constant display power monitoring device, which comprises a power supply power module, a system standby power supply, a power switching circuit, a three-phase power acquisition module, a master control MCU module, a wireless communication module, a low-power display screen module and a FLASH storage module; the main control MCU module is respectively and electrically connected with the three-phase electric quantity acquisition module, the wireless communication module, the low-power-consumption display screen module and the FLASH storage module; the power supply module and the system standby power supply output power to the power monitoring device through the power switching circuit; when the power supply is normal, the power supply supplies power; when the power supply is in the power-off state, the standby power supply of the system supplies power. The device realizes the online monitoring system for automatically acquiring power grid data, transmitting, counting and comprehensively analyzing in real time, can constantly display the accumulated running time and the accumulated power consumption under the condition of power failure, is suitable for unattended occasions, and is convenient to maintain, maintain and charge.

Description

Intelligent constant display power monitoring device
Technical Field
The utility model relates to an electric power monitoring field especially relates to a permanent display electric power monitoring devices of intelligence.
Background
With the development of the electronic industry, a large number of electronic components are widely applied in the production practice process, so that people have higher and higher requirements on the power supply quality, the power supply stability and the reliability of a power supply system, the traditional power monitoring is a mode of using a mechanical metering instrument, the reliability is not high in the using process, the influence of the external environment and the design defects of the power monitoring is very easy to cause, the measurement accuracy is not high, the result is also accurate, and the power supply system cannot be monitored in real time. Meanwhile, the accumulated running time, power consumption and the like of the equipment cannot be checked after the existing electronic electric quantity monitoring device is powered off, and the equipment is inconvenient to maintain and repair unless a mechanical metering instrument is used.
SUMMERY OF THE UTILITY MODEL
In view of the above defects in the prior art, an intelligent constant display power monitoring device is provided to solve the problems of inconvenience in equipment maintenance and repair and difficulty in charging and billing in the prior art.
Realize the utility model discloses the technical scheme of purpose is:
an intelligent constant display power monitoring device comprises a power supply module, a system standby power supply, a power supply switching circuit, a three-phase power acquisition module, a master control MCU module, a wireless communication module, a low-power display screen module and a FLASH storage module;
the main control MCU module is respectively and electrically connected with the three-phase electric quantity acquisition module, the wireless communication module, the low-power-consumption display screen module and the FLASH storage module;
the electric power supply power module and the system standby power supply output power to the electric power monitoring device through the power supply switching circuit to supply power;
the three-phase electric quantity acquisition module acquires three-phase power line electric quantity information: voltage, current, frequency, real-time power, accumulated power, and accumulated run time;
the FLASH storage module is divided into a serial FLASH for storing codes and a ferroelectric memory for storing electric quantity information;
the main control MCU module reads the electric quantity information collected by the three-phase electric quantity collection module connected with the main control MCU module through the SPI interface, and after analysis and processing, the data is sent to the low-power-consumption display screen module connected with the main control MCU module through the SPI interface to be locally displayed in real time; the master control MCU module simultaneously sends data to the wireless communication module through the serial port and sends the data to the remote terminal equipment, so that remote real-time data monitoring is realized;
the wireless communication module is used for sending data to the remote terminal equipment to realize the function of remote real-time monitoring;
the low-power consumption display screen module is used for locally displaying the electric quantity information sent to the low-power consumption display screen module by the main control MCU module, so that the real-time local display of the electric quantity information is realized, and the function of displaying the accumulated power and the accumulated running time can be kept by supplying power to the power monitoring device through a system standby power supply after the power monitoring device is powered off;
when the power supply is normal, the power supply module supplies power to the power monitoring device through the power supply switching circuit; when the power monitoring device is in a power-off state, the power monitoring device is powered by a system standby power supply through the power supply switching circuit, the main control MCU module outputs signals to enable the three-phase power acquisition module, the wireless communication module and the low-power-consumption display screen module to enter a power-saving mode, and the main control MCU module also enters a sleep mode.
Furthermore, the power supply switching circuit comprises a first Schottky diode and a second Schottky diode, the cathodes of the first Schottky diode and the second Schottky diode are connected, and the anode of the first Schottky diode is connected with the anode of the system standby power supply; the anode of the second Schottky diode is connected with the power inductor in series and then is connected with the direct current output end of the electric power supply power module; the anode of the second Schottky diode is connected with the filter capacitor;
the negative electrodes of the first Schottky diode and the second Schottky diode output power supplies power to the power monitoring device;
when the power supply is in a power-off state, the system standby power supply outputs power through the first Schottky diode.
Further, the chip model of the master control MCU module is STM32L151C8T 6.
Furthermore, the low-power display screen module is a segment code screen module or an OLED display screen module.
The device uses the battery as a system standby power supply to supply power, and realizes the power-off display function.
The device can be designed into a buckle type, so that the installation is convenient; the equipment can be monitored locally and remotely at the same time when running; when the equipment is powered off, the accumulated time length and the accumulated power consumption are used by the local display equipment, and the low-power consumption display (less than 5 uA) is performed; the equipment is electrified and powered off and reported to the remote terminal, so that remote monitoring can be realized.
The control method of the intelligent constant display power monitoring device comprises the following steps:
s1, the electric quantity monitoring device is initially in a power saving mode and is powered by a system standby power supply;
s2, the monitored equipment is powered on and operated, the power supply module supplies power for output, the electric quantity monitoring device main control MCU module is awakened, and the monitored equipment exits from the sleep mode;
s3, the main control MCU module sends an instruction to the low power consumption display screen module, the wireless communication module and the three-phase electric quantity acquisition module to exit the power saving mode;
s4, the main control MCU module sends 'equipment start operation' information to the remote terminal through the wireless communication module;
s5, the three-phase electric quantity acquisition module acquires electric quantity information and sends the electric quantity information to the main control MCU module for calculation processing;
s6, the main control MCU module sends the real-time electric quantity information to the local real-time display and remote terminal, and stores the data at regular time;
s7, the monitored equipment is powered off and stops running, and the main control MCU module sends 'equipment stop running' information to the remote terminal through the wireless communication module;
and S8, the main control MCU module sends an instruction to the low-power-consumption display screen module, the wireless communication module and the three-phase electric quantity acquisition module to enter a power saving mode, and the main control MCU module enters a sleep mode and is powered by a system standby power supply.
The utility model discloses beneficial effect who has:
(1) the device can locally display the electric quantity information such as the voltage, the current, the accumulated electric quantity and the like of the normally running electric equipment, and realizes local monitoring;
(2) the device can upload electric quantity information such as voltage, current, accumulated electric quantity and the like of normally running electric equipment to a remote terminal at regular time through a wireless module, so that remote online real-time monitoring of the electric quantity information is realized;
(3) the device has the function of reporting faults (power failure and current mutation) in real time, and a remote monitor can find the faults in time and carry out corresponding processing;
(4) the device has the functions of using the accumulated time length and the accumulated power consumption of the local constant display equipment during power failure.
The utility model provides a permanent display electric power monitoring devices of intelligence, through wireless network transmission technique, the realization carries out automatic acquisition to electric wire netting data, real-time transmission, statistics and integrated analysis's on-line monitoring system, can show long and cumulative power consumption when the accumulation operation in the condition of outage constantly moreover, be applicable to very much generator and street lamp and other unmanned on duty's occasion, like communication base station, computer lab etc. conveniently maintain maintenance and charge.
Drawings
FIG. 1 is a schematic block diagram of a circuit of an intelligent constant display power monitoring device in an embodiment;
2-1-2-3 are schematic diagrams of the circuit of the intelligent constant display power monitoring device in the embodiment; FIG. 2-1 is a schematic circuit diagram of a power processing module; fig. 2-2 is a schematic diagram of the circuit connection of the main control MCU module with the three-phase electric quantity acquisition module, the segment code screen module, and the wireless communication module; FIGS. 2-3 are schematic diagrams of FLASH memory module circuit connections;
fig. 3 is a control flowchart of the intelligent constant display power monitoring device in the embodiment.
Detailed Description
The present invention will be described with reference to the following embodiments and the accompanying drawings, wherein the embodiments are only used for explaining the present invention, and are not used for limiting the scope of the present invention.
Example (b):
as shown in fig. 1, an intelligent constant display power monitoring device comprises a power supply module, a system standby power supply, a power switching circuit, a three-phase power acquisition module, a main control MCU module, a wireless communication module, a low-power display screen module and a FLASH memory module;
the main control MCU module is respectively and electrically connected with the three-phase electric quantity acquisition module, the wireless communication module, the low-power-consumption display screen module and the FLASH storage module;
the electric power supply power module and the system standby power supply output power to the electric power monitoring device through the power supply switching circuit to supply power;
the three-phase electric quantity acquisition module acquires three-phase power line electric quantity information: voltage, current, frequency, real-time power, accumulated power, and accumulated run time;
the FLASH storage module is divided into a serial FLASH for storing codes and a ferroelectric memory for storing electric quantity information;
the main control MCU module reads the electric quantity information collected by the three-phase electric quantity collection module connected with the main control MCU module through the SPI interface, and after analysis and processing, the data is sent to the low-power-consumption display screen module connected with the main control MCU module through the SPI interface to be locally displayed in real time; the master control MCU module simultaneously sends data to the wireless communication module through the serial port and sends the data to the remote terminal equipment, so that remote real-time data monitoring is realized;
the wireless communication module is used for sending data to the remote terminal equipment to realize the function of remote real-time monitoring;
the low-power consumption display screen module is used for locally displaying the electric quantity information sent to the low-power consumption display screen module by the main control MCU module, so that the real-time local display of the electric quantity information is realized, and the function of displaying the accumulated power and the accumulated running time can be kept by supplying power to the power monitoring device through a system standby power supply after the power monitoring device is powered off;
when the power supply is normal, the power supply module supplies power to the power monitoring device through the power supply switching circuit; when the power monitoring device is in a power-off state, the power monitoring device is powered by a system standby power supply through the power supply switching circuit, the main control MCU module outputs signals to enable the three-phase power acquisition module, the wireless communication module and the low-power-consumption display screen module to enter a power-saving mode, and the main control MCU module also enters a sleep mode.
As shown in fig. 2-1, 2-2 and 2-3, the model of the chip of the main control MCU module is STM32L151C8T6, the model of the wireless communication module is NB _ IOT module BC95, and the three-phase electric quantity collection module is a three-phase electric quantity monitoring module with a chip with a sleep pin HT7038 that is a spring.
As shown in fig. 2-1, the power switching circuit includes a first schottky diode and a second schottky diode, cathodes of the first schottky diode and the second schottky diode are connected, and an anode of the first schottky diode is connected to an anode of the system standby power supply; the anode of the second Schottky diode is connected with the power inductor LW1 in series and then is connected with the direct current output end of the electric power supply power module; the anode of the second Schottky diode is connected with the filter capacitor;
the negative electrodes of the first Schottky diode and the second Schottky diode output power supplies power to the power monitoring device;
when the power supply is in a power-off state, the system standby power supply outputs power through the first Schottky diode.
Furthermore, the low-power display screen module is a segment code screen module or an OLED display screen module.
The device uses the battery as a system standby power supply to supply power, and realizes the power-off display function.
Specifically, as shown in FIGS. 2-1, 2-2, and 2-3:
the power supply module inputs an A-phase power supply AC220V of the equipment to be detected, outputs a direct current +5V power supply after AC/DC conversion is carried out by the bright weft power supply module IRM-03-05 module, and carries out DC/DC conversion by the +5V power supply passing through a TPS62260 of TI to obtain a direct current 3.7V power supply.
The standby power supply of the system adopts a combination of a lithium battery ER18505 and a lithium ion super capacitor battery, the voltage of the battery is 3.6V, the capacity is 4000mAH, and the storage performance of the lithium battery is good: the self-discharge rate of the lithium sub-battery is extremely low, and is only 1% per year; the battery generates VBAT (+3V) power as a system standby power.
The power supply switching circuit comprises a Schottky diode D1, a Schottky diode D2 and a model of SS34, the power supply processing module and the battery output by the power supply switching circuit supplies power to the whole system, and when the device operates normally, the power supply output by the DC/DC output is 3.7V higher than the voltage VBAT (+3.6V) of the battery, so that the whole device is supplied with power by the power supply output by the power supply side, and the battery is in a cut-off state, namely when the device operates, the lithium secondary battery does not work and does not consume power; when the monitoring device is in the off state, the power supply processing module is powered by a VBAT (+3.6V) power supply of the battery.
The FLASH memory module is provided with a ferroelectric memory MB85RC16 and an SPI FLASH (SPI Nor FLASH) W25Q80, the read-write times of the MB85RC16 are more than 100 hundred million times, the data capacity is reserved after the power supply is turned off, the data capacity is used for storing electric quantity information and accumulated running time of the device, the FLASH memory module is connected with the main control MCU module through an I2C interface, and a low-power-consumption off pin is provided; W25Q80 is a program memory and is connected with the main control MCU module through the SPI interface.
The wireless communication module is connected with the main control MCU module through the SPI and is responsible for sending electric quantity information to a remote place, and the module can be turned off through the RF _ EN signal to carry out a power saving mode.
The low-power-consumption display screen module is connected with the main control MCU module through the SPI and is responsible for locally displaying electric quantity information, backlight is lightened when the detection equipment runs, and the module is turned off through the LED _ EN signal to carry out backlight of the module, so that a power-saving mode is carried out.
The three-phase electric quantity acquisition module acquires the electric quantity information of the electric equipment, the electric quantity information is sent to the main control MCU module through the SPI, and the A, B, C three-phase monitoring module can be respectively turned off through A _ EN, B _ EN and C _ EN signals to realize the power saving mode.
The main control MCU module is a controller of the whole device and is responsible for carrying out technical processing on data acquired by the three-phase electric quantity acquisition module when the monitoring equipment is in an operating state, then storing the processed data in the FLASH storage module, sending the data to the low-power-consumption display screen module for local display, and simultaneously sending the data to the wireless communication module for transmission to a remote place; when the monitoring equipment is in a turn-off state, because the filter capacitor CW11(1000 muF) has the power storage capacity at the moment, the main control MCU module immediately sends an equipment turn-off signal to the remote terminal, and then outputs A _ EN, B _ EN, C _ EN signals, RF _ EN signals and LED _ EN signals to be low level, so that the three-phase electric quantity acquisition module, the wireless communication module and the low-power consumption display screen module enter a power saving mode, the main control MCU module also enters a sleep mode, and the circuit is automatically switched to be powered by a battery after the discharge of the filter capacitor CW11 is lower than 3V; if the equipment recovers to operate normally, a +5V power supply signal is output to a master control MCU module PA1-WKUP pin to wake up the master control MCU module, the master control module exits from a sleep mode, and then, A _ EN, B _ EN, C _ EN signals, RF _ EN signals and LED _ EN signals are output to be high level to enable a three-phase electric quantity acquisition module, a wireless communication module and a low-power-consumption display screen module to exit from a power-saving mode;
the three-phase electric quantity acquisition module, the wireless communication module and the low-power consumption display screen module enter a power saving mode, the main control MCU module enters a sleep mode, the power consumption of the whole device is less than 20 muA, the capacity of the lithium subcell is 4000mA, the continuous service HOURs under the condition of battery power supply are HOUR =4000 × 1000/20=200000 (HOUR), the service life is YEAR =200000/24/365=22.83 (YEAR), 1% of the battery self-discharge annual loss is removed, the service life is also more than 18 YEARs, the service life of the three-phase electric quantity acquisition module, the wireless communication module and the low-power consumption display screen module is far beyond the service life of common electronic components for 5 YEARs, and the three-phase electric quantity acquisition module.
The remote terminal comprises a mobile phone, a computer or other terminal equipment.
As shown in fig. 3, the control method of the intelligent constant display power monitoring device includes the following steps:
s1, the electric quantity monitoring device is initially in a power saving mode and is powered by a system standby power supply;
the main control MCU module is initially in a dormant mode, the three-phase electric quantity acquisition module, the wireless communication module and the low-power-consumption display screen module are also in a power-saving mode, the segment code display screen is in a static display state, the whole device is in the power-saving mode, and the power consumption is less than 10 muA;
s2, the monitored equipment is powered on and operated, the power supply module supplies power for output, the electric quantity monitoring device main control MCU module is awakened, and the monitored equipment exits from the sleep mode;
the monitored equipment I is electrified, the input of the A-phase AC220V connected with the intelligent constant display power monitoring device generates +5V through an AC/DC module IRM-03-05, the level of a PA0-WKUP pin of the main control MCU module is increased, then the main control MCU module is awakened, meanwhile, the +5V is processed by a DC/DC chip TPS62260 to generate a 3.7V power supply to supply power to the whole system, and a system standby power supply battery (3.6V) is in a cut-off state (no power consumption);
s3, the main control MCU module sends an instruction to the low power consumption display screen module, the wireless communication module and the three-phase electric quantity acquisition module to exit the power saving mode;
after the main control MCU module is awakened, immediately controlling the A _ EN, B _ EN, C _ EN signals, RF _ EN signals and LED _ EN signals to be changed into high levels, so that the three-phase electric quantity acquisition module, the wireless communication module and the low-power-consumption display screen module exit from the power saving mode and are in a working state;
s4, the main control MCU module sends 'equipment start operation' information to the remote terminal through the wireless communication module;
after all the modules exit the power saving mode, the main control MCU module immediately sends equipment starting operation information to a remote place through the wireless communication module to inform a remote monitoring end that equipment starts to operate, so that the function of timely reporting when the equipment is electrified is realized;
s5, the three-phase electric quantity acquisition module acquires electric quantity information and sends the electric quantity information to the main control MCU module for calculation processing;
the three-phase electric quantity acquisition module acquires electric quantity information and is completed by three electric quantity monitoring modules of an A phase, a B phase and a C phase, acquired data are also transmitted to the main control CPU module for processing in three phases, and the main control CPU module calculates and processes the acquired data;
s6, the main control MCU module sends the real-time electric quantity information to the local real-time display and remote terminal, and stores the data at regular time;
the main control MCU module displays the calculated electric quantity information data on a local low-power consumption display screen module in real time; meanwhile, the master control MCU module transmits the calculated electric quantity information data to a remote place through the wireless communication module, and the remote terminal can monitor the electric quantity information of the equipment in real time; the electric quantity information and the running time of the equipment are stored in a ferroelectric memory MB85RC16 at regular time;
s7, the monitored equipment is powered off and stops running, and the main control MCU module sends 'equipment stop running' information to the remote terminal through the wireless communication module;
when the monitored equipment is powered off and stops running, and the voltage and the current in the electric quantity information collected by the three-phase electric quantity collection module are both less than 20VAC (a lower limit value is set and cannot be set as 0VAC because of fluctuation of a power grid), the main control MCU module sends equipment running stop information to the remote terminal through the wireless communication module, so that the function of timely reporting the equipment when the equipment is powered off is realized;
s8, the main control MCU module sends an instruction to the low power consumption display screen module, the wireless communication module and the three-phase electric quantity acquisition module to enter a power saving mode, and the main control MCU module enters a sleep mode and is powered by a system standby power supply;
the main control MCU module immediately controls the A _ EN, B _ EN, C _ EN signals, RF _ EN signals and LED _ EN signals to be changed into low levels, so that the three-phase electric quantity acquisition module, the wireless communication module and the low-power-consumption display screen module enter a power saving mode and are in a power saving state, and the main control MCU module enters a sleep mode; because the filter capacitor CW11 has the power storage capacity, the power is supplied by the filter capacitor CW11 when the power supply of the monitoring equipment is cut off and the equipment enters the power saving state, when the voltage at the filter capacitor CW11 is lower than 3V, the circuit is automatically switched to the battery power supply, the content displayed by the intelligent constant display power monitoring device at the moment is the accumulated running time and the accumulated power consumption of the equipment, and the constant display function is realized.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (4)

1. An intelligent constant display power monitoring device is characterized by comprising a power supply module, a system standby power supply, a power supply switching circuit, a three-phase power acquisition module, a master control MCU module, a wireless communication module, a low-power display screen module and a FLASH storage module;
the main control MCU module is respectively and electrically connected with the three-phase electric quantity acquisition module, the wireless communication module, the low-power-consumption display screen module and the FLASH storage module;
the electric power supply power module and the system standby power supply output power to the electric power monitoring device through the power supply switching circuit to supply power;
the three-phase electric quantity acquisition module acquires three-phase power line electric quantity information: voltage, current, frequency, real-time power, accumulated power, and accumulated run time;
the FLASH storage module is divided into a serial FLASH for storing codes and a ferroelectric memory for storing electric quantity information;
the main control MCU module reads the electric quantity information collected by the three-phase electric quantity collection module connected with the main control MCU module through the SPI interface, and after analysis and processing, the data is sent to the low-power-consumption display screen module connected with the main control MCU module through the SPI interface to be locally displayed in real time; the master control MCU module simultaneously sends data to the wireless communication module through the serial port and sends the data to the remote terminal equipment, so that remote real-time data monitoring is realized;
the wireless communication module is used for sending data to the remote terminal equipment to realize the function of remote real-time monitoring;
the low-power consumption display screen module is used for locally displaying the electric quantity information sent to the low-power consumption display screen module by the main control MCU module, so that the real-time local display of the electric quantity information is realized, and the function of displaying the accumulated power and the accumulated running time can be kept by supplying power to the power monitoring device through a system standby power supply after the power monitoring device is powered off;
when the power supply is normal, the power supply module supplies power to the power monitoring device through the power supply switching circuit; when the power monitoring device is in a power-off state, the power monitoring device is powered by a system standby power supply through the power supply switching circuit, the main control MCU module outputs signals to enable the three-phase power acquisition module, the wireless communication module and the low-power-consumption display screen module to enter a power-saving mode, and the main control MCU module also enters a sleep mode.
2. The intelligent constant-display power monitoring device as claimed in claim 1, wherein the power switching circuit comprises a first schottky diode and a second schottky diode, cathodes of the first schottky diode and the second schottky diode are connected, and an anode of the first schottky diode is connected with an anode of a system standby power supply; the anode of the second Schottky diode is connected with the power inductor in series and then is connected with the direct current output end of the electric power supply power module; the anode of the second Schottky diode is connected with the filter capacitor;
the negative electrodes of the first Schottky diode and the second Schottky diode output power supplies power to the power monitoring device;
when the power supply is in a power-off state, the system standby power supply outputs power through the first Schottky diode.
3. The intelligent constant-display power monitoring device according to claim 1, wherein the chip model of the master control MCU module is STM32L151C8T 6.
4. The intelligent constant-display power monitoring device as claimed in claim 1, wherein the low-power display screen module is a segment code screen module or an OLED display screen module.
CN201922448199.5U 2019-12-30 2019-12-30 Intelligent constant display power monitoring device Active CN210957918U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114189035A (en) * 2020-08-24 2022-03-15 成都秦川物联网科技股份有限公司 Power supply method for Internet of things intelligent gas meter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114189035A (en) * 2020-08-24 2022-03-15 成都秦川物联网科技股份有限公司 Power supply method for Internet of things intelligent gas meter
CN114189035B (en) * 2020-08-24 2024-03-26 成都秦川物联网科技股份有限公司 Intelligent fuel gas meter power supply method based on Internet of things

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