CN212624384U - NB-IOT guide rail type DC meter - Google Patents

Abstract

The utility model provides a NB-IOT guide tracked direct current table, including the MCU module, the MCU module be connected with display module, storage module, power module, communication module and sampling module, communication module including be used for with go upward the first communication module of equipment communication and be used for with the second communication module of down equipment communication. The utility model discloses NB-IOT guide tracked direct current table can regard as the electric energy meter to use alone, also can increase and decrease the subset wantonly in restriction quantity within range, forms to be the link by RS485, and the NB module is the meter reading system network of networking communication key point, can change in a flexible way according to the detection demand of circuit.

Description

NB-IOT guide rail type DC meter

Technical Field

The utility model relates to a novel charging device especially relates to a NB-IOT guide tracked direct current table.

Background

The electric energy meter is a measuring device in a power grid system, and the use condition of the power grid electric energy can be visually seen through the electric energy meter.

The demand of the direct current electric energy meter in production and life is increasing, and the direct current electric energy meter is needed in the occasions such as a direct current screen, a telecommunication base station and the like which are widely put into use.

The concentrator is a key device in a centralized meter reading system, automatically reads and stores electric quantity data of various acquisition terminals through a downlink channel, and simultaneously exchanges data with a master station or a handheld device through an uplink channel.

In the prior art, each electric energy meter needs to upload collected data to a master station through a concentrator, one or more electric energy meters are connected to one concentrator, and the concentrator itself serves as a communication central point. In addition, the electric energy meter generally realizes data transmission with the collector in an infrared communication mode, a wired communication mode (RS485 interface, RS232 interface, etc.), a wireless communication mode 9GSM communication, GPRS communication, etc., or a power carrier communication mode. The above-mentioned methods other than the wireless communication method are limited by distance, and the wireless communication method is not limited by distance, but is limited by network environment, communication base station, etc. and the communication cost is relatively higher. Therefore, in a place where the electric energy meters are widely distributed, each electric energy meter needs to be provided with a concentrator independently, and the problems of resource waste, complicated structure and the like exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem, provide a NB-IOT guide tracked direct current table.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

the utility model provides a NB-IOT guide tracked dc table, includes the MCU module, the MCU module be connected with display module, storage module, power module, communication module and sampling module, communication module including be used for with the first communication module of ascending equipment communication and be used for with the second communication module of descending equipment communication.

In the NB-IOT guide rail type dc meter, the first communication module includes an NB communication module connected to the MCU module.

In the guide rail type direct current table of the NB-IOT, the NB communication module comprises an NB module and an SIM card, the SIM card is connected with the NB module, and the NB module is connected with the MCU module.

In the NB-IOT guide rail type dc meter, the second communication module includes an RS485 communication module connected to the MCU module.

In the NB-IOT guide rail type dc flow table, the uplink device includes a master station or a handheld device.

In the NB-IOT guide rail type dc meter, the downlink device includes an electric energy meter having an RS485 communication module or the NB-IOT guide rail type dc meter.

In the NB-IOT guide rail type dc meter, the sampling module includes a current sampling module and a voltage sampling module.

In the NB-IOT guide rail type dc meter, the power module includes a lightning protection unit, a PWM control chip, a clamping circuit, and a transformer, which are sequentially connected to the power supply terminal, and the transformer has three secondary circuits.

In the NB-IOT guide rail type direct current meter, the display module includes backlight light sources of two colors connected to the MCU module.

In the NB-IOT guide rail type direct current meter, the MCU module is also connected with a power failure detection circuit.

The utility model has the advantages that: the utility model provides a collector of merit is copied in area, or provide a take simultaneously electric energy meter of RS485 communication module and NB communication module, can regard as the electric energy meter to use alone, also can increase and decrease the sub-equipment wantonly in the restriction quantity within range, form by RS485 be the tie, the NB module is the system network of checking meter of networking communication key point, can be according to the detection demand of circuit and nimble transform.

Drawings

Fig. 1 is a block diagram of the circuit structure of the NB-IOT guide rail type dc meter of the present invention;

fig. 2 is a circuit diagram of a power supply module of the NB-IOT rail dc meter of the present invention;

FIG. 3 is a schematic view of the NB-IOT guide rail type DC form of the present invention for exclusive use in copying and reading;

fig. 4 is a schematic diagram of a communication reading network formed by the NB-IOT guide rail type dc meter of the present invention.

Reference numerals: an MCU module 1; a display module 2; a storage module 3; a power supply module 4; a communication module 5; an NB communication module 51; an RS485 communication module 52; a sampling module 6; a downlink device 7; and an upstream device 8.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, the present embodiment discloses an NB-IOT guide rail type dc table, which includes an MCU module 1, where the MCU module 1 includes an HT5019 chip, and is used to calculate sampling data, control data storage, and process communication data. The MCU module 1 is connected with a display module 2, a storage module 3, a power supply module 4, a communication module 5 and a sampling module 6, and the sampling module 6 comprises a current sampling module and a voltage sampling module as same as a common electric energy meter.

Further, the MCU module 1 is further connected to a power-down detection circuit, and the power-down detection circuit, the display module 2, the storage module 3, the current sampling module, and the voltage sampling module all adopt circuits in the prior art, and the specific circuit structure is not described herein. Preferably, the display module 2 includes backlight light sources of two colors connected to the MCU module 1, the two colors are blue and red, respectively, and the red backlight is displayed under abnormal voltage and current conditions and power down conditions, and the blue backlight is displayed under all normal conditions.

Further, as shown in fig. 2, the power module 4 of this embodiment mainly adopts a flyback power supply form, specifically, a PWM control chip with a model number of SY50433 controls the primary charging and discharging of the transformer to store energy, and then the primary is coupled to the secondary, and the rectification filter is changed into a dc power supply. RU1 and R5 in FIG. 2 constitute a lightning protection unit to prevent the power-on surge from damaging the following devices; c10 is an X capacitor for filtering out differential mode interference; d9, D10, L2 and C11 form a rectifying and filtering circuit; d4, C8, R13, R14 constitute RCD clamp circuit, because the inductance has the leakage inductance, the switching tube is in the turn-off moment, can produce very big spike voltage and cause the chip to damage, and RCD clamp circuit is used for protecting SY50433 PWM control chip to burn out. A high-voltage MOS tube and a PWM controller are integrated in a SY50433 chip, a high-voltage direct-current power supply is changed into stable direct-current voltage through a rectifying and filtering circuit, when the MOS tube is turned off, energy is stored in a primary transformer, when the MOS tube is closed, energy is transferred from the primary transformer to a secondary transformer, D1, C2 and R75 are secondary filtering and rectifying circuits, and finally, direct-current 13V voltage is output. The secondary circuit of the transformer has 3 paths, and after the networks 15V and 15V-1 are stabilized by the LDO, the networks respectively supply power to the voltage sampling module and the current sampling module; the voltage of the network 12V is 13V, and after the voltage is stabilized to 3.3V through a SY8113 DCDC chip, power supplies are provided for the MCU module 1, the communication module 5, the display module 2, the storage module 3 and the like.

Preferably, the communication module 5 comprises a first communication module for communicating with the upstream device 8 and a second communication module for communicating with the downstream device 7.

Specifically, the first communication module includes an NB communication module 51 connected to the MCU module 1. The NB communication module 51 includes an NB module and a SIM card, the SIM card is connected to the NB module, the NB module is connected to the MCU module 1, and the NB module includes the remote BC28 or the remote BC 95.

The second communication module comprises an RS485 communication module 52 connected to the MCU module 1.

The uplink device 8 here mainly refers to a master station or a handheld device or other terminal devices; the downlink device 7 can be a common electric energy meter with an RS485 communication module, and also can be the NB-IOT guide rail type direct current meter 10.

The NB communication module 51 has the advantages that the limitation of communication distance is almost eliminated, communication dead angles are almost eliminated, and the electric energy meter with the RS485 communication module can be connected to an internet-of-things system with network communication through the combination of the NB module and the RS485 module.

RS 485's advantage is through wired connection to guaranteed the response speed of communication, with low costs easy the maintenance moreover, cooperation NB module, fine solution wired communication's limitation problem.

The dc meter of the present embodiment is equipped with both the basic sampling module 6 and the NB communication module 51 for communicating with the upstream device 8, and also has the RS485 communication module 52 for communicating with the downstream device 7. When the electric energy meter is put into use, as shown in fig. 3, the NB-IOT guide rail type dc meter 10 can be used as an independent electric energy meter, that is, sampling is performed by itself, after the sampling data is calculated, the processed acquisition data is uploaded to the upstream device, namely the master station 9, and is directly sampled by the NB-IOT guide rail type dc meter 10 and is automatically uploaded to the upstream device 8, that is, the NB-IOT guide rail type dc meter 10 is both an electric energy meter and an acquisition device. In addition, as shown in fig. 4, the NB-IOT guide rail type dc meter 10 may also increase or decrease sub-devices within a limited number range, for example, a plurality of common electric energy meters 11 with RS485 communication function are connected to the NB-IOT guide rail type dc meter 10, the common electric energy meters 11 perform sampling, after processing the sampled data, send the collected data to the NB-IOT guide rail type dc meter 10 in an RS485 communication manner, and the NB-IOT guide rail type dc meter 10 forwards the collected data of itself and the collected data of the common electric energy meters 11 connected thereto to the master station 9.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although MCU module 1 is used more herein; a display module 2; a storage module 3; a power supply module 4; a communication module 5; an NB communication module 51; the RS485 communication module 52 is a sampling module 6; a downlink device 7; upstream device 8, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims (10)

1. The utility model provides a NB-IOT guide tracked current table, includes MCU module (1), MCU module (1) be connected with display module (2), storage module (3), power module (4), communication module (5) and sampling module (6), its characterized in that, communication module (5) including be used for with the first communication module of ascending equipment (8) communication and be used for with the second communication module of descending equipment (7) communication.

2. The NB-IOT rail-mounted dc current meter as claimed in claim 1, wherein the first communication module comprises an NB communication module (51) connected to the MCU module (1).

3. The NB-IOT rail-mounted dc flow meter according to claim 2, wherein the NB communication module (51) comprises an NB module and a SIM card, the SIM card is connected to the NB module, and the NB module is connected to the MCU module (1).

4. The NB-IOT rail-mounted dc flow meter according to claim 2, wherein the second communication module comprises an RS485 communication module (52) connected to the MCU module (1).

5. The NB-IOT guided flow meter according to claim 4, wherein the upstream device (8) comprises a master station or a handheld device.

6. The NB-IOT guideway DC meter of claim 5, wherein the downstream device (7) comprises a common electric energy meter with an RS485 communication module (5) or the NB-IOT guideway DC meter.

7. The NB-IOT rail dc current table according to claim 1, wherein the sampling module (6) comprises a current sampling module and a voltage sampling module.

8. The NB-IOT rail-mounted dc current transformer as claimed in claim 7, wherein the power module (4) comprises a lightning protection unit, a PWM control chip, a clamping circuit and a transformer, which are connected to the power supply in sequence, and the transformer has three secondary circuits.

9. The NB-IOT rail-mounted direct current watch according to claim 1, wherein the display module (2) comprises backlight light sources of two colors connected to the MCU module (1).

10. The NB-IOT rail-mounted DC meter of claim 1, wherein the MCU module (1) is further connected with a power failure detection circuit.

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