CN109633256A - A kind of low-voltage intelligent terminal system - Google Patents
A kind of low-voltage intelligent terminal system Download PDFInfo
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- CN109633256A CN109633256A CN201910104432.XA CN201910104432A CN109633256A CN 109633256 A CN109633256 A CN 109633256A CN 201910104432 A CN201910104432 A CN 201910104432A CN 109633256 A CN109633256 A CN 109633256A
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- 238000004891 communication Methods 0.000 claims abstract description 37
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 238000005070 sampling Methods 0.000 claims description 22
- 230000005611 electricity Effects 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
- G01K7/24—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Physics & Mathematics (AREA)
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
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- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The present invention provides a kind of low-voltage intelligent terminal system, including control system, power-supply system, acquisition system and communication system, and the control system is electrically connected with power-supply system, and the control system is connect with acquisition system and communication system signal respectively；The acquisition system includes voltage collection circuit, current collection circuit, NTC resistance value sample circuit, switching value sample circuit；The communication system includes LORA wireless communication module circuit, RS485 communicating circuit, low pressure broadband power carrier module circuit；The control system includes single-chip microcontroller, and multiple serial interfaces, multiple SPI interfaces, multiple digital interfaces, clock interface, PCX interface, ADC interface, reseting interface, I are equipped with inside the single-chip microcontroller2C interface and power interface.The present invention be integrated with measurement busbar voltage, busbar electric current, busbar and cable contact point temperature and switch minute, the function of conjunction state.
Description
Technical field
The present invention is a kind of low-voltage intelligent terminal system, belongs to field of intelligent control technology.
Background technique
Low-voltage intelligent terminal is the distribution transforming automated production exclusively for low-voltage cable junction box design, be a kind of collection measure,
Remotely monitor the comprehensive monitoring device being integrated.
But the external transfer function of existing equipment data is single, is not able to satisfy practical application needs, is badly in need of one kind of multiple data
The low-voltage intelligent terminal system of external transmission mode.
Summary of the invention
In view of the deficienciess of the prior art, it is an object of the present invention to provide a kind of low-voltage intelligent terminal system, on solving
The problem of proposing in background technique is stated, the present invention is integrated with measurement busbar voltage, busbar electric current, busbar and cable contact point temperature
And switch point, the function of conjunction state.
To achieve the goals above, the present invention is to realize by the following technical solutions: a kind of low-voltage intelligent terminal system
System, including control system, power-supply system, acquisition system and communication system, the control system is electrically connected with power-supply system, described
Control system is connect with acquisition system and communication system signal respectively；
The acquisition system includes voltage sampling circuit, current sampling circuit, NTC resistance value sample circuit, switching value sampling
Circuit；
The communication system includes LORA wireless communication module circuit, RS485 communicating circuit, low pressure broadband power carrier wave mould
Block circuit；
The control system includes single-chip microcontroller, and multiple serial interfaces, multiple SPI interfaces, more are equipped with inside the single-chip microcontroller
A digital interface, clock interface, PCX interface, ADC interface, reseting interface, I2C interface and power interface, the clock interface are defeated
The output end signal for entering end and clock circuit connects, and the SPI interface is connect with storage circuit, LORA wireless module signal, institute
The input terminal for stating digital interface is connect with the output end signal of voltage collection circuit, current collection circuit, the reseting interface
The connection of the output end signal of input terminal and reset circuit, the serial interface are connect with RS485 circuit signal, the PCX interface
Input terminal connect with the output end signal of switching value sample circuit, the I2The input terminal and temperature and humidity measurement chip of C interface
Output end signal connection, the input terminal of the ADC Sampling Interface connect with NTC resistance sampling circuit signal, and the power supply connects
The input terminal of mouth is electrically connected with the output end of voltage conversion circuit；
The power-supply system is connect with AC220V ac voltage signal, the output end and pressure stabilizing rectified current of the power-supply system
The input terminal of source module is electrically connected, the output end of the pressure stabilizing rectifier power supply module respectively with power backup circuit and linear voltage stabilization
The input terminal of chip is electrically connected, and the output end of the power backup circuit is electrically connected with the input terminal of linear regulator chip, described
The output end of linear regulator chip respectively with single-chip microcontroller, RS485 communicating circuit, temperature and humidity sample circuit, LORA wireless telecommunications mould
Block, switching value sample circuit, the electrical connection of NTC sample circuit.
Further, the power-supply system uses contact electricity getting mode or Current Mutual Inductance formula way to take power；The power supply mould
The external AC220V of block or Current Mutual Inductance electricity-fetching module
Further, the voltage collection circuit is also connect with voltage sensor, the voltage sensor and AC220V electricity
Piezoelectricity connection, the output end of the voltage sensor and the input end signal of voltage collection circuit connect.
Further, the voltage sensor includes but is not limited to voltage transformer, electric resistance partial pressure sensor, capacitive sensing
Sensor, the voltage collection circuit use but are not limited to discrete component type, integrated chip change type, digit chip metering-type side
Formula handles the voltage signal of voltage sensor sampling.
Further, the current collection circuit is also connect with current-limiting circuit, the output end and electric current of the current-limiting circuit
The input end signal of Acquisition Circuit connects, and the input terminal of the current-limiting circuit and the output end signal of current transformer connect.
Further, the current transformer includes but is not limited to Rogowski coil, Hall sensor, copper-manganese sampling sensing
Device, current collection circuit, which uses but is not limited to discrete component type, integrated chip change type, digit chip metering-type mode, handles electricity
The input signal of current transformer.
Further, the NTC resistance value sample circuit includes temperature acquisition sensor, the temperature acquisition sensor it is defeated
The connection of the input end signal of outlet and operational amplifier, the output end of the operational amplifier pass through ADC interface and single-chip microcontroller
Input terminal connects signal and connects.
Further, the switching value sample circuit includes switching value light-coupled isolation module, output switch parameter end with it is described
The input end signal of switching value light-coupled isolation module connects, and is connected by the input end signal of I/O interface and single-chip microcontroller.
Further, the SPI interface signal of the input terminal of the LORA wireless communication module circuit and single-chip microcontroller connects, institute
The output end for stating LORA wireless communication module circuit is connect with the input terminal of intelligent communication gateway.
Further, the UART interface signal of the output end of the RS485 communicating circuit and single-chip microcontroller connects, described
The input terminal of RS485 communicating circuit is electrically connected with the output end of low pressure broadband power carrier module.
Beneficial effects of the present invention:
(1) present invention uses current collection circuit and voltage collection circuit to the detection of electric current, voltage.This circuit is not only
Accuracy is high, and hard ware & soft ware design is simple, and over-sampling and Digital Signal Processing are used in circuit design, significantly
Ground improves the accuracy of measurement of circuit, while the data after A/D conversion carry out operation and processing by digital circuit, guarantee
The long-time stability of circuit.
(2) voltage sampling circuit of the invention and current sampling circuit have measurement range wide, and precision is high, reliable and stable,
Response band is wide, while having measurement and relay protection function, and small in size, light-weight, safety and meets environmental requirement.
(3) present invention uses LORA wireless communication module, which may operate at low-power consumption mode or non-low-power consumption mode,
Under low-power consumption mode, acquisition data are uploaded to intelligent communication gateway by periodic wakeup, subsequently into low-power sleep state, etc.
To wake-up next time；Under non-low-power consumption mode, device is constantly in wake-up states, can form mesh net with other devices
Network.When there is new equipment to be added in network, address is distributed for it automatically by intelligent communication gateway.
(4) present invention uses low pressure broadband power carrier wave communication technology, which is that the high-frequency signal of carrying information is added
It is loaded in AC 220V, then utilizes the power line transmission of various grades, receives the modem of information again high-frequency signal from AC
It is separated in 220V, sends device end for carrier data；The technology on the basis of not needing re-wiring, realizes number
According to multiple services carryings such as, voice and videos.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is a kind of structure chart of low-voltage intelligent terminal system of the present invention；
Fig. 2 is a kind of power system structure figure of low-voltage intelligent terminal system of the present invention；
Fig. 3 is a kind of voltage collection circuit connection figure of low-voltage intelligent terminal system of the present invention；
Fig. 4 is a kind of current collection circuit connection figure of low-voltage intelligent terminal system of the present invention；
Fig. 5 is a kind of NTC sample circuit structure chart of low-voltage intelligent terminal system of the present invention；
Fig. 6 is a kind of switching value sample circuit structure chart of low-voltage intelligent terminal system of the present invention；
Fig. 7 is a kind of LORA wireless communication module circuit structure diagram of low-voltage intelligent terminal system of the present invention；
Fig. 8 is a kind of RS485 communicating circuit structure chart of low-voltage intelligent terminal system of the present invention.
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to
Specific embodiment, the present invention is further explained.
Referring to Fig. 1, the present invention provides a kind of technical solution: a kind of low-voltage intelligent terminal system, which is characterized in that including
Control system, power-supply system, acquisition system and communication system, the control system are electrically connected with power-supply system, control system point
It is not connect with acquisition system and communication system signal；
Control system includes single-chip microcontroller, and wherein single-chip microcontroller is STM32F103RCT6 single-chip microcontroller, is equipped with inside single-chip microcontroller multiple
Serial interface, multiple SPI interfaces, multiple digital interfaces, clock interface, PCX interface, ADC interface, reseting interface, I2C interface and
The output end signal of power interface, clock interface input terminal and clock circuit connects, and SPI interface and storage circuit, LORA are wireless
Module by signal connection, the input terminal of digital interface are connect with the output end signal of voltage collection circuit, current collection circuit, voltage
Not only accuracy is high for Acquisition Circuit, current collection circuit, and hard ware & soft ware design is simple, and uses and adopt in circuit design
Sample and Digital Signal Processing greatly increase the accuracy of measurement of circuit, while the data after A/D conversion are by number
Word circuit carries out operation and processing, ensure that the long-time stability of circuit；The output of the input terminal and reset circuit of reseting interface
End signal connection, serial interface are connect with RS485 circuit signal, the output of the input terminal and switching value sample circuit of PCX interface
End signal connection, I2The input terminal of C interface is connect with the output end signal of temperature and humidity measurement chip, the input of ADC Sampling Interface
End is connect with NTC resistance sampling circuit signal, and the input terminal of power interface is electrically connected with the output end of voltage conversion circuit.
As depicted in figs. 1 and 2, power-supply system is connect with AC 220V AC voltage signal, the output end of power-supply system and steady
The input terminal electrical connection for pressing rectifier power supply module, is converted to DC 5V DC power supply, the power supply of DC 5V for AC 220V AC power source
It is divided into 2 tunnels, the first via charges to backup power supply, and when the AC 220V power supply of main system breaks down, backup power supply, which plays, to be made
With sending intelligent communication gateway for the state of main system failure by wireless communication module；Second tunnel is then by linear steady
The power supply of DC5V is converted to the power supply of DC 3.3V by pressure chip, to adopt to single-chip microcontroller, the sampling of NTC resistance value, on-off model
The modular circuits power supplies such as sample, LORA wireless communication module, RS485 communicating circuit, temperature and humidity sampling.
Power-supply system is external using novel contact electricity getting mode or Current Mutual Inductance formula way to take power, power module
The output end of AC220V or Current Mutual Inductance electricity-fetching module, power module is connect with pressure stabilizing rectifier power supply module, converted output
DC power supply.
Acquisition system includes voltage collection circuit, current collection circuit, NTC resistance value sample circuit, opens as shown in figures 3 to 6
Sample circuit is measured in pass, and voltage collection circuit is also connect with voltage sensor, and voltage sensor is electrically connected with AC220V voltage, voltage
The output end of sensor and the input end signal of voltage collection circuit connect, and wherein voltage sensor includes but is not limited to that voltage is mutual
The modes sampled voltage signal such as sensor, electric resistance partial pressure sensor, capacitive influence sensor, voltage collection circuit are used but are not limited to
The modes such as discrete component type, integrated chip change type, digit chip metering-type handle the voltage signal of voltage sensor sampling；Electricity
Stream Acquisition Circuit is also connect with current-limiting circuit, and the output end of current-limiting circuit and the input end signal of current collection circuit connect, limit
The input terminal of current circuit and the output end signal of current transformer connect, and wherein current transformer includes but is not limited to Roche line
Circle, Hall sensor, copper-manganese sampling sensor, current collection circuit use but are not limited to discrete component type, integrated chip conversion
The modes such as formula, digit chip metering-type handle the input signal of current transformer；NTC resistance value sample circuit includes that temperature acquisition passes
Sensor, the output end of temperature acquisition sensor and the input end signal of operational amplifier connect, and the output end of operational amplifier is logical
The input end signal for crossing ADC interface and single-chip microcontroller connects, and temperature acquisition sensor includes but is not limited to NTC formula sensor, PTC formula
Sensor, digital core sheet type sensor, infrared-sensing type temperature sensor, temperature acquisition processing mode are including but not limited to discrete
Component type, integrated chip type；Switching value sample circuit includes switching value light-coupled isolation module, output switch parameter end and switching value light
The input end signal of coupling isolation module connects, and is connect by I/O interface with single-chip microcontroller.
As shown in Figure 7 and Figure 8, communication system includes that LORA wireless communication module circuit, RS485 communicating circuit, low pressure are wide
Band power line carrier module circuit, the input terminal of LORA wireless communication module circuit and the SPI interface of single-chip microcontroller connect, and LORA is wireless
The output end of communication module circuit is connect with the input terminal of intelligent communication gateway, by the collected voltage of single-chip microcontroller, electric current, node
The much informations such as temperature pass to intelligent communication gateway by LORA wireless communication module；The output end and list of RS485 communicating circuit
The UART interface of piece machine connects, and the input terminal of RS485 communicating circuit and the output end signal of low pressure broadband power carrier module connect
It connects, can also use directly as external communication interface, be connect with the serial ports of single-chip microcontroller, RS485 communicating circuit is directly as outer
Portion's communication interface is connect by UART interface with single-chip microcomputer input signal.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention, for this field skill
For art personnel, it is clear that invention is not limited to the details of the above exemplary embodiments, and without departing substantially from spirit of the invention or
In the case where essential characteristic, the present invention can be realized in other specific forms.Therefore, in all respects, should all incite somebody to action
Embodiment regards exemplary as, and is non-limiting, the scope of the present invention by appended claims rather than on state
Bright restriction, it is intended that including all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention
It is interior.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (10)
1. a kind of low-voltage intelligent terminal system, which is characterized in that including control system, power-supply system, acquisition system and communication system
System, the control system are electrically connected with power-supply system, and the control system is connect with acquisition system and communication system signal respectively；
The acquisition system includes voltage sampling circuit, current sampling circuit, NTC resistance value sample circuit, switching value sample circuit；
The communication system includes LORA wireless communication module circuit, RS485 communicating circuit, low pressure broadband power carrier module electricity
Road；
The control system includes single-chip microcontroller, and multiple serial interfaces, multiple SPI interfaces, multiple numbers are equipped with inside the single-chip microcontroller
Word interface, clock interface, PCX interface, ADC interface, reseting interface, I2C interface and power interface, the clock interface input terminal
It is connect with the output end signal of clock circuit, the SPI interface is connect with storage circuit, LORA wireless module signal, the number
The input terminal of word interface is connect with the output end signal of voltage collection circuit, current collection circuit, the input of the reseting interface
End connect with the output end signal of reset circuit, the serial interface is connect with RS485 circuit signal, the PCX interface it is defeated
Enter end to connect with the output end signal of switching value sample circuit, the I2The input terminal of C interface is defeated with temperature and humidity measurement chip
End signal connects out, and the input terminal of the ADC Sampling Interface is connect with NTC resistance sampling circuit signal, the power interface
Input terminal is electrically connected with the output end of voltage conversion circuit；
The power-supply system is connect with AC220V ac voltage signal, the output end and pressure stabilizing rectifier power source mould of the power-supply system
The input terminal of block is electrically connected, the output end of the pressure stabilizing rectifier power supply module respectively with power backup circuit and linear regulator chip
Input terminal electrical connection, the output end of the power backup circuit be electrically connected with the input terminal of linear regulator chip, it is described linearly
The output end of voltage stabilizing chip respectively with single-chip microcontroller, RS485 communicating circuit, temperature and humidity sample circuit, LORA wireless communication module, open
Measure sample circuit, the electrical connection of NTC resistance value sample circuit in pass.
2. a kind of low-voltage intelligent terminal system as described in claim 1, which is characterized in that the power-supply system is taken using contact
Power mode or Current Mutual Inductance formula way to take power；The external AC220V of the power module or Current Mutual Inductance electricity-fetching module.
3. a kind of low-voltage intelligent terminal system as described in claim 1, which is characterized in that the voltage collection circuit also with electricity
Pressure sensor connection, the voltage sensor are electrically connected with AC220V voltage, and output end and the voltage of the voltage sensor are adopted
The input end signal of collector connects.
4. a kind of low-voltage intelligent terminal system as claimed in claim 3, which is characterized in that the voltage sensor includes but not
It is limited to voltage transformer, electric resistance partial pressure sensor, capacitive influence sensor, the voltage collection circuit is used but is not limited to discrete
Component type, integrated chip change type, digit chip metering-type mode handle the voltage signal of voltage sensor sampling.
5. a kind of low-voltage intelligent terminal system as described in claim 1, which is characterized in that the current collection circuit also with limit
Current circuit connection, the output end of the current-limiting circuit and the input end signal of current collection circuit connect, the current-limiting circuit
The connection of the output end signal of input terminal and current transformer.
6. a kind of low-voltage intelligent terminal system as claimed in claim 5, which is characterized in that the current transformer includes but not
It is limited to Rogowski coil, Hall sensor, copper-manganese sampling sensor, current collection circuit uses but be not limited to discrete component type, collection
The input signal of current transformer is handled at chip change type, digit chip metering-type mode.
7. a kind of low-voltage intelligent terminal system as described in claim 1, which is characterized in that the NTC resistance value sample circuit packet
Temperature acquisition sensor is included, the output end of the temperature acquisition sensor and the input end signal of operational amplifier connect, described
The output end of operational amplifier is connected by the input end signal of ADC interface and single-chip microcontroller.
8. a kind of low-voltage intelligent terminal system as described in claim 1, which is characterized in that the switching value sample circuit includes
Switching value light-coupled isolation module, output switch parameter end is connect with the input end signal of the switching value light-coupled isolation module, and is led to
The input end signal for crossing I/O interface and single-chip microcontroller connects.
9. a kind of low-voltage intelligent terminal system as described in claim 1, which is characterized in that the LORA wireless communication module electricity
The input terminal on road and the SPI interface signal of single-chip microcontroller connect, and the output end and intelligence of the LORA wireless communication module circuit are logical
Interrogate the input terminal connection of gateway.
10. a kind of low-voltage intelligent terminal system as described in claim 1, which is characterized in that the RS485 communicating circuit it is defeated
The connection of the UART interface signal of outlet and single-chip microcontroller, the input terminal and low pressure broadband power carrier wave mould of the RS485 communicating circuit
The output end signal of block connects.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910104432.XA CN109633256A (en) | 2019-02-01 | 2019-02-01 | A kind of low-voltage intelligent terminal system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910104432.XA CN109633256A (en) | 2019-02-01 | 2019-02-01 | A kind of low-voltage intelligent terminal system |
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| CN109633256A true CN109633256A (en) | 2019-04-16 |
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| CN201910104432.XA Pending CN109633256A (en) | 2019-02-01 | 2019-02-01 | A kind of low-voltage intelligent terminal system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110266820A (en) * | 2019-07-16 | 2019-09-20 | 国网湖南省电力有限公司 | An intelligent communication relay device for low-voltage equipment |
| CN110850161A (en) * | 2019-12-25 | 2020-02-28 | 浙江永泰隆电子股份有限公司 | Power sensor |
| CN114593824A (en) * | 2022-03-07 | 2022-06-07 | 合肥工业大学 | A non-contact measuring infrared thermometer |
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Application publication date: 20190416 |
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| RJ01 | Rejection of invention patent application after publication |