CN210294362U - Electric energy meter with LoRa communication module - Google Patents
Electric energy meter with LoRa communication module Download PDFInfo
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- CN210294362U CN210294362U CN201921000473.6U CN201921000473U CN210294362U CN 210294362 U CN210294362 U CN 210294362U CN 201921000473 U CN201921000473 U CN 201921000473U CN 210294362 U CN210294362 U CN 210294362U
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Abstract
The utility model discloses an electric energy meter with a LoRa communication module, which comprises a detection module (2), wherein the detection module is provided with an MCU and a LoRa communication module; the LoRa communication module is connected with the MCU; the detection module is a square box body; the detection module comprises a bottom box (29) and a surface cover (30); 1 bottom box contact (27) is respectively arranged at 4 angular positions of the upper surface of the bottom box, and 4 surface cover contacts (28) are correspondingly arranged at 4 angular positions of the lower surface of the surface cover; after the surface cover is covered on the bottom box, the contacts of the bottom box are conducted with the contacts of the surface cover through the conductive cotton, and 4 detection switches S1-S4 are formed by 4 surface cover contacts and 4 bottom box contacts. This electric energy meter with loRa communication module has theftproof function.
Description
Technical Field
The utility model relates to an electric energy meter with loRa communication module.
Background
The conventional electric meter generally adopts a physical anti-counterfeiting mode of lead sealing, if a lead strip is damaged, the electric meter is opened, and the condition that the electric meter is damaged cannot be monitored in real time by the mode.
Therefore, there is a need for a new electric energy meter with anti-theft function.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an electric energy meter with loRa communication module is provided, this electric energy meter with loRa communication module adopts split type structure, easily loading and unloading, and the flexibility is good, and the function is abundant.
The technical solution of the utility model is as follows:
an electric energy meter with a LoRa communication module comprises a detection module (2), wherein an MCU and the LoRa communication module are arranged in the detection module;
the LoRa communication module is connected with the MCU;
the detection module is a square box body; the detection module comprises a bottom box (29) and a surface cover (30);
4 corner positions of the upper surface of the bottom box are respectively provided with 1 bottom box contact (31), and 4 corner positions of the lower surface of the surface cover are correspondingly provided with 4 surface cover contacts (28); after the surface cover is covered on the bottom box, the contacts of the bottom box are conducted with the contacts of the surface cover through conductive cotton, and 4 detection switches S1-S4 are formed by 4 surface cover contacts and 4 bottom box contacts; the surface cover is connected with the bottom box through a screw;
4 face cover contacts are all grounded, and 4 bottom box contacts are respectively connected with Vcc through resistors R11, R22, R33 and R44; vcc is typically 5V, and R11, R22, R33 and R44 are all 1000 ohms;
the 4 bottom box contacts are also respectively connected with 4 IO interfaces P01, P02, P03 and P04 of the MCU;
the 4 bottom box contacts are also respectively connected with 4 input ends of the four-input-end OR gate, and the output end of the four-input-end OR gate is connected with one IO port P05 of the MCU. MCU is connected with the measurement chip for the electric energy measurement, specifically is prior art.
And 4 corners of the detection module are provided with round chamfers.
The detection module is provided with a display screen (21) and a key (22).
The detection module is embedded on the base (1), and the MCU is also connected with a 3G, 4G or 5G communication module.
A positioning module is also arranged in the detection module; the positioning module is a GPS module or a Beidou module.
And 4 corners of the detection module are provided with round chamfers.
MCU is present mature device, if adopt DSP or singlechip, therefore, this scheme belongs to pure hardware scheme, does not relate to any procedure and method, belongs to the object of utility model protection.
Has the advantages that:
the utility model discloses an electric energy meter with loRa communication module has following characteristics:
(1) the anti-theft alarm has an anti-theft circuit, once the face cover is damaged, the alarm is automatically started, and the safety is high.
(2) And the elastic contact is adopted to realize electric connection, so that the flexibility is good.
(3) And 4 corners of the detection module are provided with round chamfers, so that the detection module can be conveniently embedded into the concave parts.
(4) The system comprises a display for displaying the detection parameters and the status parameters, and a communication module for uploading data to a remote server.
(5) The intelligent temperature and humidity monitoring system has the advantages that the camera is arranged, the indoor monitoring function can be achieved, the temperature and humidity sensor is arranged, the temperature and humidity monitoring of the field environment can be achieved, the ammeter is used as a terminal of the Internet of things, and therefore more potential can be exerted.
(6) Adopt split type structure, it is concrete, by base and detection module, easily loading and unloading, the flexibility is good.
In conclusion, the electric energy meter with the LoRa communication module is compact in structure, flexible and convenient to use and rich in functions.
Drawings
Fig. 1 is a schematic diagram of the general structure of an electric energy meter with a LoRa communication module;
FIG. 2 is a schematic view of the arrangement of the spring contacts and magnetic members;
fig. 3 is a top view of an electric energy meter with a LoRa communication module;
FIG. 4 is a schematic diagram of a dimming circuit;
FIG. 5 is a schematic diagram of a constant current charging circuit;
FIG. 6 is a schematic diagram of an overcurrent protection circuit;
FIG. 7 is a general electrical schematic block diagram of the present invention;
FIG. 8 is a circuit schematic of the anti-theft circuit;
FIG. 9 is a schematic view of the contact distribution on the back box;
fig. 10 is a schematic view of the contact distribution at the bottom of the face cover.
Description of reference numerals: 1-base, 2-detection module;
the first wire is led in 11-and the second wire is led out 13-respectively,
21-display screen, 22-key, 23-two-dimensional code, 27-side groove;
28-face cover contacts, 29-bottom box, 30-face cover, 31-bottom box contacts;
33-spring contact, 34-magnetic means.
Detailed Description
The invention will be described in further detail with reference to the following figures and specific embodiments:
example 1:
as shown in fig. 9-10, an electric energy meter with an LoRa communication module includes a detection module 2, in which an MCU and an LoRa communication module are disposed;
the LoRa communication module is connected with the MCU;
the detection module is a square box body; the detection module comprises a bottom box 29 and a face cover 30;
1 bottom box contact 31 is respectively arranged at 4 angular positions of the upper surface of the bottom box, and 4 surface cover contacts 28 are correspondingly arranged at 4 angular positions of the lower surface of the surface cover; after the surface cover is covered on the bottom box, the contacts of the bottom box are conducted with the contacts of the surface cover through conductive cotton, and 4 detection switches S1-S4 are formed by 4 surface cover contacts and 4 bottom box contacts; the surface cover is connected with the bottom box through a screw;
4 face cover contacts are all grounded, and 4 bottom box contacts are respectively connected with Vcc through resistors R11, R22, R33 and R44; vcc is typically 5V, and R11, R22, R33 and R44 are all 1000 ohms;
the 4 bottom box contacts are also respectively connected with 4 IO interfaces P01, P02, P03 and P04 of the MCU;
the 4 bottom box contacts are also respectively connected with 4 input ends of the four-input-end OR gate, and the output end of the four-input-end OR gate is connected with one IO port P05 of the MCU. MCU is connected with the measurement chip for the electric energy measurement, specifically is prior art.
And 4 corners of the detection module are provided with round chamfers.
The detection module is provided with a display screen 21 and a key 22.
The detection module is embedded on the base 1, and the MCU is also connected with a 3G, 4G or 5G communication module.
Description of the working principle:
referring to FIG. 8, normally, the switches S1-S4 are closed loop, so that all of P01-P04 are grounded, i.e. low; the OR gate outputs a low level;
once the cover is considered to be broken or loosened, at least one switch is disconnected, a high level is inevitably existed between P01 and P04 because R11-R44 are pull-up resistors, and the MCU inquires the states of P01-P04 to know which switch or switches are disconnected;
meanwhile, the OR gate outputs high level, and the MCU starts alarming.
In addition, as shown in fig. 1 to 3, an electric energy meter with a LoRa communication module is provided, wherein an electric energy metering terminal is in communication connection with a server through a wireless communication module;
the electric energy metering terminal is provided with an MCU, a temperature sensor, a humidity sensor and a camera;
the electric energy metering terminal is also provided with a display screen and a key;
the display screen 21, the keys 22, the temperature sensor, the humidity sensor and the camera are all connected with the MCU;
the electric energy metering terminal comprises a base 1 and a square detection module 2, wherein the detection module is embedded in a square concave part on the base, and the detection module is electrically connected with the base through an elastic contact.
The wireless communication module is a WiFi communication module, a 3G, 4G or 5G communication module.
The opposite sides of the detection module are also provided with lateral grooves 27.
4 magnetic components 34 are arranged at 4 corners of the square concave part, and magnetic components matched with the 4 magnetic components are also arranged at the bottom of the electric energy metering terminal.
2 groups of magnetic parts are mutually adsorbed, so that the detection module is used for the reliable butt joint of the base through the elastic contact.
The temperature sensor and the humidity sensor are both arranged on the upper surface of the detection module of the electric energy metering terminal.
A positioning module is also arranged in the detection module; the positioning module is a GPS module or a Beidou module.
And 4 corners of the detection module are provided with round chamfers, so that the detection module can be conveniently embedded into the concave parts.
The battery is used for enabling the detection module to work when power is cut off and sending information to the server.
The upper surface or the lower surface or the side part of the detection module is provided with a two-dimensional code, and the two-dimensional code comprises an ID number, a serial number and the like and is used for registering and accessing the detection module after being scanned by a mobile phone.
The keys are used for controlling page turning of the display screen and for functions of resetting, powering on and powering off and the like of the whole module.
In addition, the other circuits and modules involved in the electric energy meter with the LoRa communication module are described as follows:
as shown in fig. 4, the electric energy meter with the LoRa communication module further includes a brightness adjusting circuit for adjusting the brightness of the light emitted by the display screen; the brightness adjusting circuit comprises an MCU, an LED lamp string, a triode, a potentiometer Rx and an A/D converter; the triode is an NPN type triode; a knob switch is arranged above a fixing frame of the display screen and is coaxially connected with the potentiometer Rx;
the potentiometer Rx and the first resistor R1 are connected in series to form a voltage division branch, one end of the voltage division branch is connected with the positive electrode Vcc of the power supply, and the other end of the voltage division branch is grounded; the connection point of the potentiometer Rx and the first resistor R1 is connected with the input end of the A/D converter; the output end of the A/D converter is connected with the data input port of the MCU;
the LED lamp string comprises a plurality of LED lamps which are connected in series; the anode of the LED lamp string is connected with the anode Vcc of the power supply; the negative electrode of the LED lamp string is connected with the C electrode of the triode, and the E electrode of the triode is grounded through a second resistor R2; the B pole of the triode is connected with the output end of the MCU. The power supply positive pole Vcc is 5V, and the A/D converter is an 8-bit serial output type converter.
(II) as shown in FIG. 5, the constant current charging circuit for charging the lithium battery comprises a constant voltage driving chip and a current feedback circuit;
(1) the voltage output end of the constant voltage driving chip is a positive output end VOUT + of the constant current charging circuit; the negative output end of the constant voltage driving chip is grounded;
the constant voltage driving chip is powered by a direct current voltage power supply end VIN + and VIN-;
(2) the current feedback circuit comprises resistors R1, R2 and R5 and a reference voltage end VREF +;
the reference voltage end VREF + is grounded through resistors R1, R2 and R5 which are sequentially connected in series;
the connecting point of the resistor R5 and the resistor R2 is a negative output end VOUT < - >;
the connection point of the resistors R1 and R2 is connected with the feedback terminal FB of the constant voltage driving chip.
The constant current charging circuit also comprises a voltage feedback circuit;
the voltage feedback circuit comprises resistors R3 and R4 and a diode D1;
the resistors R3 and R4 are connected in series and then connected between the positive output end VOUT + of the constant current charging circuit and the ground; the connection point of the resistors R3 and R4 is connected with the anode of the diode D1; the cathode of the diode D1 is connected to the feedback terminal FB of the constant voltage driving chip.
And (iii) as shown in fig. 6 to 7, the electric energy meter with the LoRa communication module further includes a current detection and relay control circuit (also called as an overcurrent detection and protection circuit), which is described as follows:
the working principle is as follows: the current transformer (or coil) for detecting the current generates mutual inductance current, the larger the field power consumption is, the larger the mutual inductance current is, the smaller the field power consumption is, and the smaller the mutual inductance current is, so that a signal waveform can be output by using the voltage comparator, and the Main Controller (MCU) can obtain the field current size information through the self-contained AD acquisition, thereby achieving the detection effect. In the circuit design, alternating current mutual inductance current is converted into direct current through four rectifier diodes, two output signals are provided, one is analog quantity, and the output signals are output by VOUT and output to an MCU; and the direct control relay is used for switching off and switching on the power supply of the main power supply for TTL high-low level.
Description of the circuit:
vin is obtained from an output signal of the current transformer through a bridge rectifier; the comparator compares Vin with reference voltage Vref, and if Vin is greater than Vref, the comparator outputs low level to control the relay to be disconnected.
In addition, Vin enters an ADC port (namely, a port with an A/D conversion function) of the MCU after being amplified by the amplifier;
because the signal is weak, an amplifier with adjustable amplification factor is designed; the specific circuit connection and working principle are as follows:
the output end Vin of the bridge rectifier (single-phase rectifier bridge) is a signal end, the signal end is connected with the inverting input end of the operational amplifier LM393 through a resistor R0, the homodromous input end of the operational amplifier LM393 is grounded through a resistor R0, the homodromous input end of the operational amplifier LM393 is also connected with 4 input channels of a 4-selected selector through 4 resistors R01-R04 respectively, the output channel of the 4-selected selector is connected with the output end Vout of the operational amplifier LM393, and the Vout is connected with the ADC end of the MCU;
in addition, 2 output ports of the MCU are respectively connected with a channel selection end A and a channel selection end B of a 4-selection selector;
calculation formula of Vout and Vin:
vout ═ Vin, (Rx + R0)/R0; wherein Rx ═ R01, R02, R03, or R04; determining which resistance to select based on the gate terminal AB; and R01, R02, R03 and R04 are each different; preferred R04-5-R03-25-R02-100-R01; r01-5 × R0. can conveniently achieve span and precision switching.
Claims (4)
1. The electric energy meter with the LoRa communication module is characterized by comprising a detection module (2), wherein an MCU and the LoRa communication module are arranged in the detection module;
the LoRa communication module is connected with the MCU;
the detection module is a square box body; the detection module comprises a bottom box (29) and a surface cover (30);
4 corner positions of the upper surface of the bottom box are respectively provided with 1 bottom box contact (31), and 4 corner positions of the lower surface of the surface cover are correspondingly provided with 4 surface cover contacts (28); after the surface cover is covered on the bottom box, the contacts of the bottom box are conducted with the contacts of the surface cover through conductive cotton, and 4 detection switches S1-S4 are formed by 4 surface cover contacts and 4 bottom box contacts;
4 face cover contacts are all grounded, and 4 bottom box contacts are respectively connected with Vcc through resistors R11, R22, R33 and R44;
the 4 bottom box contacts are also respectively connected with 4 IO interfaces P01, P02, P03 and P04 of the MCU;
the 4 bottom box contacts are also respectively connected with 4 input ends of the four-input-end OR gate, and the output end of the four-input-end OR gate is connected with one IO port P05 of the MCU.
2. The electric energy meter with the LoRa communication module according to claim 1, characterized in that 4 corners of the detection module are provided with round chamfers.
3. The electric energy meter with the LoRa communication module according to claim 1, characterized in that the detection module is provided with a display screen (21) and a key (22).
4. The electric energy meter with the LoRa communication module according to any one of claims 1-3, characterized in that the detection module is embedded on the base (1), and the MCU is further connected with a 3G, 4G or 5G communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921000473.6U CN210294362U (en) | 2019-06-29 | 2019-06-29 | Electric energy meter with LoRa communication module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921000473.6U CN210294362U (en) | 2019-06-29 | 2019-06-29 | Electric energy meter with LoRa communication module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210294362U true CN210294362U (en) | 2020-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921000473.6U Active CN210294362U (en) | 2019-06-29 | 2019-06-29 | Electric energy meter with LoRa communication module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210294362U (en) |
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- 2019-06-29 CN CN201921000473.6U patent/CN210294362U/en active Active
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