CN211697970U - Environment monitoring meter-dividing electricity-metering terminal with high reliability - Google Patents
Environment monitoring meter-dividing electricity-metering terminal with high reliability Download PDFInfo
- Publication number
- CN211697970U CN211697970U CN202020086520.XU CN202020086520U CN211697970U CN 211697970 U CN211697970 U CN 211697970U CN 202020086520 U CN202020086520 U CN 202020086520U CN 211697970 U CN211697970 U CN 211697970U
- Authority
- CN
- China
- Prior art keywords
- circuit
- power supply
- main control
- control circuit
- interface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model belongs to the technical field of detecting instruments, and provides an environment monitoring sub-meter electricity metering terminal with high reliability, which comprises a main board circuit, wherein the main board circuit comprises an LORA module and is used for being connected with an electric meter of a factory so as to collect electric meter data; the main control circuit is connected with the LORA module; and one end of the data transmission module is connected with the main control circuit, and the other end of the data transmission module is used for being connected with the server. Through the technical scheme, the problem that the reliability of the environment on-line monitoring equipment is poor in the prior art is solved.
Description
Technical Field
The utility model belongs to the technical field of detecting instrument, a environmental monitoring branch table electricity metering terminal that reliability is high is related to.
Background
At present, whether the tail end emission concentration of an enterprise is up to standard is monitored mainly through online monitoring equipment in the environment-friendly industry, and when the emission concentration is not up to standard, the enterprise is considered to be illegal and illegal to produce.
The traditional online monitoring equipment can only monitor the concentration of terminal emissions of enterprises, is difficult to monitor for some enterprises which emit inorganically or are not provided with the terminal monitoring equipment, and can not effectively identify the problem of terminal monitoring equipment abnormity or artificial data counterfeiting.
SUMMERY OF THE UTILITY MODEL
The utility model provides an environment monitoring divides table electricity metering terminal that reliability is high has solved the poor problem of environment on-line monitoring equipment reliability among the prior art.
The technical scheme of the utility model is realized like this: comprises a main board circuit including
The LORA module is used for being connected with electric meters of a factory so as to collect electric meter data;
the main control circuit is connected with the LORA module;
and one end of the data transmission module is connected with the main control circuit, and the other end of the data transmission module is used for being connected with the server.
Further, the device also comprises a battery charging and discharging management circuit, wherein the battery charging and discharging management circuit comprises a charging control circuit and a discharging control circuit which are both connected with the battery management chip,
the charging control circuit comprises a first switch circuit, the input end of the first switch circuit is used for being connected with a power supply circuit, the power supply interface and the battery interface of the mainboard circuit are both connected with the output end of the first switch circuit, the control end of the first switch circuit is connected with the battery management chip,
the discharging control circuit comprises a selection circuit, one input end of the selection circuit is used for being connected with the power circuit, the other input end of the selection circuit is connected with the battery interface, and the output end of the selection circuit is sequentially connected with the battery management chip and the power interface of the mainboard circuit.
Furthermore, the mainboard circuit still includes falls electric alarm circuit, fall electric alarm circuit including the opto-coupler input circuit, optical coupler and the opto-coupler output circuit that connect gradually, opto-coupler input circuit is connected with power supply circuit, opto-coupler output circuit with master control circuit connects.
Further, the data transmission module is an NB-IOT module, one end of the NB-IOT module is connected with the server, and the other end of the NB-IOT module is connected with the main control circuit through a USART interface.
Further, the mainboard circuit further comprises an RS485/RS232 communication circuit, the RS485/RS232 communication circuit comprises an RS485 interface chip and an RS232 interface chip which are connected with the selection terminal, and the selection terminal is connected with the main control circuit.
Further, the mainboard circuit further comprises an analog input circuit, the analog input circuit comprises an input filter circuit, a voltage follower circuit and an output filter circuit which are sequentially connected, the input filter circuit is used for being connected with an analog interface, and the output filter circuit is connected with a main control circuit.
Further, the main control circuit comprises a storage circuit connected with the main control chip.
Furthermore, the main control circuit also comprises a liquid crystal interface circuit connected with the main control chip.
Further, the power circuit comprises a first isolation power supply and a second isolation power supply which are both connected with an isolation transformer, the first isolation power supply and the second isolation power supply are respectively connected with two isolated outputs of the isolation transformer, and the input of the isolation transformer is used for being connected with an alternating current power supply.
The utility model discloses a theory of operation and beneficial effect do:
1. the utility model discloses a be connected LORA module and ammeter, read the production facility of blowdown enterprise and the power consumption data of the facility of managing pollution, the LORA module sends this power consumption data to master control circuit, reaches the server again through the data transmission module, and the environmental monitoring department can monitor in the emergent response of environmental haze limit stopping production through the power consumption data of reading the server, and the limit stopping production task condition of blowdown enterprise realizes the effective supervision to the blowdown enterprise.
When in actual use, can with the utility model discloses electricity metering terminal installs near the block terminal, and the LORA module passes through wireless mode and ammeter communication, reads ammeter data and obtains the production facility of blowdown enterprise and the power consumption data of the facility of treating pollution, avoids the trouble of wired network deployment.
The utility model discloses according to the production facility of blowdown enterprise and the power consumption condition of the facility of treating pollution, analytical equipment opens and stops state and production line or the holistic operating mode state of enterprise to according to the whole operating mode state of enterprise, judge whether the enterprise has the environmental protection to administer the violation condition, the judged result is accurate reliable.
2. The utility model discloses well battery charge-discharge management circuit is used for carrying out the dynamic management between power supply circuit and battery. When the AC220V commercial power is electrified, the charging control circuit controls the power circuit to charge the battery and provides working power for the mainboard circuit; when the AC220V commercial power is dead, the battery provides working power supply for the main board circuit, which ensures that the AC220V commercial power is suddenly cut off, the utility model can work normally for a period of time; when the battery reaches the discharge cut-off voltage, the discharge control circuit controls the battery to stop supplying power to the mainboard circuit.
The battery management chip controls the on-off of the first switch circuit, so that the power circuit is controlled to charge the battery and the mainboard circuit; when the AC220V commercial power is dead, the output of the selection circuit is the battery voltage, the power management chip is used for detecting whether the battery voltage reaches the discharge cut-off voltage, when the battery voltage reaches the discharge cut-off voltage, the connection between the battery interface and the mainboard circuit is disconnected, and the battery stops supplying power to the mainboard circuit.
3. The utility model discloses in when the output voltage that warning circuit detected power supply circuit that falls crossed the electricity low time, send outage alarm signal to master control circuit, master control circuit sends outage alarm signal for the server through data transmission module, and the environmental monitoring department can in time discover the outage condition to take corresponding measure.
4. The utility model adopts NB-IOT module as the data transmission module, which has low cost and low power consumption; through the RS485/RS232 communication circuit, the user can set the configuration parameters of the utility model, including the number of the connection points, the MODBUS address, the factor code, the communication frequency of the LORA module, and the like; meanwhile, the program of the main control circuit can be upgraded through an RS485/RS232 communication circuit; through setting up the option terminal, the user can set up RS485/RS232 communication circuit as required for RS485 communication mode or RS232 communication mode.
5. The utility model discloses can also carry out the analog quantity collection through analog quantity input interface, in order to improve the utility model discloses a commonality. The input filter circuit is used for filtering an input analog quantity signal, the voltage follower circuit is used for carrying out impedance conversion, the load carrying capacity of the circuit is improved, and the output filter circuit is used for filtering the output of the voltage follower.
6. The utility model discloses well memory circuit is used for carrying out local real-time storage to the data that LORA module gathered to data loss when preventing NB-IOT network can't communicate. When the NB-IOT network recovers, data can be taken out of the storage circuit for reissuing.
7. The utility model discloses well liquid crystal interface circuit is used for external LCD screen to the data that the LORA module of real-time display gathered is convenient for carry out the understanding directly perceived clearly to the power consumption condition.
8. The utility model discloses the mains voltage of two way isolations of well power supply circuit output, wherein keep apart power one and be used for the mainboard circuit power supply, keep apart power two and be used for providing the power of isolation to the warning circuit that falls.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic circuit block diagram of the present invention;
FIG. 2 is a schematic diagram of a main control circuit of the present invention;
FIG. 3 is a schematic diagram of a charge and discharge management circuit of the present invention;
fig. 4 is a schematic diagram of a data transmission module according to the present invention;
FIG. 5 is a schematic diagram of the power down alarm circuit of the present invention;
FIG. 6 is a schematic diagram of a RS485/RS232 communication circuit according to the present invention;
FIG. 7 is a schematic diagram of an analog input circuit according to the present invention;
FIG. 8 is a schematic diagram of a memory circuit according to the present invention;
FIG. 9 is a schematic diagram of an interface circuit of the liquid crystal display device of the present invention;
FIG. 10 is a schematic diagram of a power supply circuit according to the present invention;
in the figure: 1-a mainboard circuit, 2-LORA module, 3-a main control circuit, 31-a main control chip, 32-a storage circuit, 33-a liquid crystal interface circuit, 4-a data transmission module, 41-SIM card interface, 5-a battery charging and discharging management circuit, 51-a charging control circuit, 511-a first switch circuit, 52-a discharging control circuit, 521-a selection circuit, 53-a battery management chip, 6-a battery interface, 7-a power circuit, 71-an isolation transformer, 72-an isolation power supply I, 73-an isolation power supply II, 8-a power failure alarm circuit, 81-an optical coupling input circuit, 82-an optical coupler, 83-an optical coupling output circuit, 9-RS485/RS232 communication circuit, 91-RS485 interface chip, 92-RS232 interface chip, 93-a selection terminal, 10-an analog input circuit, 101-an input filter circuit, 102-a voltage follower circuit and 103-an output filter circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 to 10, includes a main board circuit 1, and the main board circuit 1 includes
The LORA module 2 is used for being connected with electric meters of a factory so as to collect electric meter data;
the main control circuit 3 is connected with the LORA module 2;
and one end of the data transmission module 4 is connected with the main control circuit 3, and the other end of the data transmission module is used for being connected with a server.
This embodiment is through being connected LORA module 2 with the ammeter, reads the production facility of blowdown enterprise and the power consumption data of the facility of treating pollution, and LORA module 2 sends this power consumption data to master control circuit 3, uploads the server through data transmission module 4 again, and the environment monitoring department can monitor in the emergent response of environmental haze limit stopping production through reading the power consumption data of server, and the limit of blowdown enterprise stops production task condition in fact, realizes the effective supervision to the blowdown enterprise.
During actual use, can install this embodiment electricity metering terminal near the block terminal, LORA module 2 passes through wireless mode and ammeter communication, obtains the production facility of blowdown enterprise and the power consumption data of pollution control facility through reading ammeter data, avoids the trouble of wired network deployment.
According to the power utilization condition of the production facility and the pollution control facility of the pollution discharge enterprise, the starting and stopping state of the analysis equipment and the working condition state of the production line or the whole enterprise are analyzed, whether the enterprise has the environmental protection and regulation violation condition or not is judged according to the whole working condition state of the enterprise, and the judgment result is accurate and reliable.
Further, the battery charging and discharging management circuit 5 is also included, the battery charging and discharging management circuit 5 of the mainboard circuit 1 includes a charging control circuit 51 and a discharging control circuit 52 which are both connected with a battery management chip 53,
the charging control circuit 51 of the motherboard circuit 1 comprises a first switch circuit 511, the input terminal of the first switch circuit 511 of the motherboard circuit 1 is used for connecting with the power circuit 7, the power interface and the battery interface 6 of the motherboard circuit 1 are both connected with the output terminal of the first switch circuit 511 of the motherboard circuit 1, the control terminal of the first switch circuit 511 of the motherboard circuit 1 is connected with the battery management chip 53 of the motherboard circuit 1,
the main board circuit 1 discharge control circuit 52 comprises a selection circuit 521, one input end of the main board circuit 1 selection circuit 521 is used for being connected with the power supply circuit 7, the other input end of the main board circuit 1 selection circuit 521 is connected with the battery interface 6, and the output end of the main board circuit 1 selection circuit 521 is sequentially connected with the battery management chip 53 and the power supply interface of the main board circuit 1.
The battery charge/discharge management circuit 5 in this embodiment is used for dynamic management between the power supply circuit 7 and the battery. When the AC220V commercial power is electrified, the charging control circuit 51 controls the power circuit 7 to charge the battery, and simultaneously provides working power for the mainboard circuit 1; when the AC220V commercial power is dead, the battery provides working power supply for the main board circuit 1, so that the embodiment can work normally for a period of time when the AC220V commercial power is suddenly cut off; when the battery reaches the discharge cutoff voltage, the discharge control circuit 52 controls the battery to stop supplying power to the main board circuit 1.
The battery management chip 53 controls the on/off of the first switch circuit 511, so as to control the power circuit 7 to charge the battery and the main board circuit 1; when the AC220V commercial power is dead, the output of the selection circuit 521 is the battery voltage, the power management chip is used to detect whether the battery voltage reaches the discharge cut-off voltage, and when the battery voltage reaches the discharge cut-off voltage, the connection between the battery interface 6 and the motherboard circuit 1 is disconnected, and the battery stops supplying power to the motherboard circuit 1.
As shown in fig. 3, the specific model of the battery management chip 53 is BQ24133RGYR, the first switch circuit 511 includes MOS transistors P1 and P2, the specific models of P1 and P2 are CSD17313Q2, the S pole of P1 and the S pole of P2 are both connected to the seventh pin of BQ24133RGYR, the G pole of P1 and the G pole of P2 are both connected to the eighth pin of BQ24133RGYR, the D pole of P1 is connected to the power supply circuit 7, and the D pole of P2 is connected to the motherboard circuit 1, so that the power supply circuit 7 controls the power supply of the motherboard circuit 1.
Meanwhile, the D pole of P2 is connected with battery interface 6 through switching tube P3, the specific model of P3 is IRF9332PBF, the G pole of P3 is connected with the nineteenth pin of battery management chip 53, and power supply circuit 7 dynamically charges the battery.
When the commercial power of the AC220V is cut off, the output of the selection circuit 521 is the battery voltage, the output of the selection circuit 521 is connected to the fourth pin of the battery management chip 53, when the battery voltage is normal, the nineteenth pin of the battery management chip 53 outputs a high level, the battery supplies power to the motherboard circuit 1, and when the battery voltage is too low, that is, reaches the discharge cut-off voltage, the nineteenth pin of the battery management chip 53 outputs a low level, and the battery stops supplying power to the motherboard circuit 1.
Further, mainboard circuit 1 still includes power fail warning circuit 8, and mainboard circuit 1 power fail warning circuit 8 is including opto-coupler input circuit 81, optical coupler 82 and the opto-coupler output circuit 83 that connect gradually, and mainboard circuit 1 opto-coupler input circuit 81 is connected with power supply circuit 7, and mainboard circuit 1 opto-coupler output circuit 83 is connected with mainboard circuit 1 main control circuit 3.
When the power failure alarm circuit 8 detects that the output voltage of the power circuit 7 is too low in the embodiment, the power failure alarm signal is sent to the main control circuit 3, the main control circuit 3 sends the power failure alarm signal to the server through the data transmission module 4, and the environment monitoring department can find the power failure condition in time and take corresponding measures.
Further, the data transmission module 4 of the mainboard circuit 1 is an NB-IOT module, one end of the mainboard circuit 1NB-IOT module is connected with the server, and the other end is connected with the main control circuit 3 through a USART interface.
Further, the main board circuit 1 further comprises an RS485/RS232 communication circuit 9, the main board circuit 1RS485/RS232 communication circuit 9 comprises an RS485 interface chip 91 and an RS232 interface chip 92 which are both connected with the selection terminal 93, and the selection terminal 93 of the main board circuit 1 is connected with the main control circuit 3.
In the embodiment, the data transmission module 4 adopts an NB-IOT module, the specific model is BC28, and the data transmission module has the advantages of low cost and low power consumption; through the RS485/RS232 communication circuit 9, the user can set the configuration parameters of this embodiment, including the number of connection points, MODBUS address, factor code, communication frequency of the LORA module 2, and the like; meanwhile, the program of the main control circuit 3 can be upgraded through the RS485/RS232 communication circuit 9; by setting the selection terminal 93, the user can set the RS485/RS232 communication circuit 9 to the RS485 communication mode or the RS232 communication mode as necessary.
Further, the main board circuit 1 further includes an analog input circuit 10, the analog input circuit 10 of the main board circuit 1 includes an input filter circuit 101, a voltage follower circuit 102 and an output filter circuit 103 which are connected in sequence, the input filter circuit 101 of the main board circuit 1 is used for being connected with an analog interface, and the output filter circuit 103 of the main board circuit 1 is connected with the main control circuit 3.
The embodiment can also acquire analog quantity through the analog quantity input interface so as to improve the universality of the embodiment. The input filter circuit 101 is used for filtering an input analog quantity signal, the voltage follower circuit 102 is used for performing impedance conversion, the load capacity of the circuit is improved, and the output filter circuit 103 is used for filtering the output of the voltage follower.
Further, the main control circuit 3 of the main board circuit 1 includes a memory circuit 32 connected to the main control chip 31.
In this embodiment, the storage circuit 32 is configured to locally store the data collected by the LORA module 2 in real time, so as to prevent the data from being lost when the NB-IOT network cannot be connected. When the NB-IOT network recovers, data may be taken from the memory circuit 32 for reissuing.
As shown in FIG. 2, the specific model of the main control chip 31 is STM32F103RBT 6.
Further, the main control circuit 3 of the main board circuit 1 further includes a liquid crystal interface circuit 33 connected to the main control chip 31 of the main board circuit 1.
Liquid crystal interface circuit 33 is used for external LCD screen in this embodiment to the data that LORA module 2 gathered are shown in real time, are convenient for carry out audio-visual clear understanding to the power consumption condition.
Further, the main board circuit 1 power circuit 7 includes a first isolation power supply 72 and a second isolation power supply 73 both connected to the isolation transformer 71, the first isolation power supply 72 and the second isolation power supply 73 of the main board circuit 1 are respectively connected to two isolated outputs of the isolation transformer 71 of the main board circuit 1, and an input of the isolation transformer 71 of the main board circuit 1 is used for being connected to an ac power supply.
In this embodiment, the power supply circuit 7 outputs two isolated power supply voltages, where the first isolated power supply 72 is used to supply power to the motherboard circuit 1, and the second isolated power supply 73 is used to provide an isolated power supply for the power failure alarm circuit 8.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides an environment monitoring point table electricity metering terminal that reliability is high which characterized in that: comprises a main board circuit (1), wherein the main board circuit (1) comprises
The LORA module (2) is used for being connected with electric meters of a factory to collect electric meter data;
the main control circuit (3) is connected with the LORA module (2);
and one end of the data transmission module (4) is connected with the main control circuit (3), and the other end of the data transmission module is used for being connected with a server.
2. The environment monitoring electricity-metering terminal with high reliability according to claim 1, characterized in that: the battery charging and discharging management circuit (5) is also included, the battery charging and discharging management circuit (5) comprises a charging control circuit (51) and a discharging control circuit (52) which are both connected with a battery management chip (53),
the charging control circuit (51) comprises a first switch circuit (511), the input end of the first switch circuit (511) is used for being connected with a power supply circuit (7), a power supply interface and a battery interface (6) of the mainboard circuit (1) are both connected with the output end of the first switch circuit (511), the control end of the first switch circuit (511) is connected with the battery management chip (53),
the discharging control circuit (52) comprises a selection circuit (521), one input end of the selection circuit (521) is used for being connected with a power supply circuit (7), the other input end of the selection circuit (521) is connected with a battery interface (6), and the output end of the selection circuit (521) is sequentially connected with a battery management chip (53) and a power supply interface of the mainboard circuit (1).
3. The environment monitoring electricity-metering terminal with high reliability according to claim 1, characterized in that: mainboard circuit (1) still includes falls electric alarm circuit (8), fall electric alarm circuit (8) including opto-coupler input circuit (81), optical coupler (82) and opto-coupler output circuit (83) that connect gradually, opto-coupler input circuit (81) are connected with power supply circuit (7), opto-coupler output circuit (83) with main control circuit (3) are connected.
4. The environment monitoring electricity-metering terminal with high reliability according to claim 1, characterized in that: the data transmission module (4) is an NB-IOT module, one end of the NB-IOT module is connected with the server, and the other end of the NB-IOT module is connected with the main control circuit (3) through a USART interface.
5. The environment monitoring electricity-metering terminal with high reliability according to claim 1, characterized in that: mainboard circuit (1) still includes RS485/RS232 communication circuit (9), RS485/RS232 communication circuit (9) are including RS485 interface chip (91) and RS232 interface chip (92) all being connected with option terminal (93), option terminal (93) are connected with main control circuit (3).
6. The environment monitoring electricity-metering terminal with high reliability according to claim 1, characterized in that: mainboard circuit (1) still includes analog input circuit (10), analog input circuit (10) are including input filter circuit (101), voltage follower circuit (102) and output filter circuit (103) that connect gradually, input filter circuit (101) are used for with analog interface connection, output filter circuit (103) are connected with main control circuit (3).
7. The environment monitoring electricity-metering terminal with high reliability according to claim 1, characterized in that: the main control circuit (3) comprises a storage circuit (32) connected with a main control chip (31).
8. The environment monitoring electricity metering terminal with high reliability according to claim 7, wherein: the main control circuit (3) further comprises a liquid crystal interface circuit (33) connected with the main control chip (31).
9. The environment monitoring electricity-metering terminal with high reliability according to claim 2, characterized in that: the power circuit (7) comprises a first isolation power supply (72) and a second isolation power supply (73) which are connected with an isolation transformer (71), the first isolation power supply (72) and the second isolation power supply (73) are respectively connected with two paths of isolation outputs of the isolation transformer (71), and the input of the isolation transformer (71) is used for being connected with an alternating current power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020086520.XU CN211697970U (en) | 2020-01-15 | 2020-01-15 | Environment monitoring meter-dividing electricity-metering terminal with high reliability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020086520.XU CN211697970U (en) | 2020-01-15 | 2020-01-15 | Environment monitoring meter-dividing electricity-metering terminal with high reliability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211697970U true CN211697970U (en) | 2020-10-16 |
Family
ID=72772223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020086520.XU Active CN211697970U (en) | 2020-01-15 | 2020-01-15 | Environment monitoring meter-dividing electricity-metering terminal with high reliability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211697970U (en) |
-
2020
- 2020-01-15 CN CN202020086520.XU patent/CN211697970U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101958544B (en) | System and method for calculating line loss rate of electric power distribution line | |
| CN101794480B (en) | Pre-purchased power controller | |
| CN101359006A (en) | Intelligent power utilization monitoring device | |
| CN202076846U (en) | Electro-information management system with vicious load identifying function as well as multifunctional ammeter | |
| CN102945594A (en) | Meter-bus data collector with ultra-low power loss | |
| CN103853138A (en) | Power management system of wireless smart socket based on RFID | |
| CN103176100B (en) | Method and device for detecting whether storage battery is normally connected in UPS (uninterrupted power supply) or not | |
| CN207232252U (en) | A kind of dual power supply electric quantity collector | |
| CN206990675U (en) | A kind of data center intelligent electric meter monitoring system | |
| CN201278001Y (en) | Power consumption monitoring instrument | |
| CN211697970U (en) | Environment monitoring meter-dividing electricity-metering terminal with high reliability | |
| CN102708624A (en) | Prepayment electricity utilization management terminal | |
| CN212435433U (en) | Intelligent electricity utilization monitoring device | |
| CN107632198A (en) | A kind of dual power supply electric quantity collector and its application method | |
| CN209560016U (en) | A kind of DC power supply plate connector detection system | |
| CN209542825U (en) | A kind of on-line monitoring system of CVT measurement error state | |
| CN202976445U (en) | Counter bus data collector with ultralow power consumption | |
| CN210669620U (en) | Electric energy meter control system with double-loop power supply | |
| CN209446674U (en) | The online real-time phase acquisition device of power grid three-phase alternating current | |
| CN107748288A (en) | Radio energy table based on radio communication | |
| CN109188041B (en) | Intelligent electric meter with electricity utilization control function | |
| CN209342867U (en) | A kind of test device of water meter teletransmission circuit board | |
| CN207586327U (en) | High-voltage parallel capacitor on-line monitoring system | |
| CN207301202U (en) | Low-voltage distribution network circuit health status monitors device on-line | |
| CN206593729U (en) | A kind of hand-held detection configurating terminal of intellectual water meter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |