CN209103513U

CN209103513U - Wireless data acquisition unit

Info

Publication number: CN209103513U
Application number: CN201821975922.4U
Authority: CN
Inventors: 王灿
Original assignee: ZHUHAI ZHONGHUI MICROELECTRONICS CO Ltd
Current assignee: ZHUHAI ZHONGHUI MICROELECTRONICS CO Ltd
Priority date: 2018-11-28
Filing date: 2018-11-28
Publication date: 2019-07-12
Anticipated expiration: 2028-11-28

Abstract

Wireless data acquisition unit, it include: main control module, the main control module includes MCU, the carrier communication unit being connected with the MCU and the RS485 communication unit being connected with the MCU, the carrier communication unit and long-range system host communicate to connect, and the RS485 communication unit is connect with local payload communication；The communication module being connected with the main control module, the communication module and long-range system host communicate to connect；For the power module that the main control module and the communication module are powered, input terminal and the city of the power module are electrically connected.The Wireless data acquisition unit of the utility model can be compatible with communication, install, is easy to use, be inputted using the alternating current of 220V, without providing additional power supply, adapt to various working environments, realize the wireless transmission of acquisition data.

Description

Wireless data acquisition unit

Technical field

The utility model belongs to wireless communication technology field, and in particular to a kind of data acquisition based on energy Internet of Things Device.

Background technique

Real-time monitoring system needs collected data sending back to Master Control Center through transmission network, and Master Control Center is according to biography The data returned are monitored and manage to surveyed environment.Such as monitoring system by sensor to the temperature of surveyed environment, humidity, After the digital or analog signals such as illumination are acquired, collected data are performed corresponding processing, for Master Control Center to being surveyed Environment is monitored and controls.The data transfer mode of real-time monitoring system is generally divided into two kinds of wire transmission and wireless transmission. Mostly traditional data acquisition is carried out by wire transmission mode, and wire transmission has speed fast, high reliablity, the operation is stable etc. Advantage, but this data transfer mode is easy to be influenced by environment or acquisition data mode, in some special occasions, such as personnel The remote environment that can not be reached has the environment of highly corrosive or scene can not be using the environment of open-wire line connection, the side of wire transmission Formula will be restricted, and be unable to satisfy the demand of data acquisition and transmission.In addition, needing to set up when data are transmitted in a wired fashion The problem of economic investment of cable network, manpower and material resources is all bigger, and there is higher costs.

With the development of radio-frequency receiving-transmitting technology, microelectric technique and integrated circuit technique, wireless communication technique is achieved Large development basically reaches the level of cable-network transmission in terms of design cost, transmission rate, reliability.Wireless transmission by In not needing to set up network, and mounting means is relatively flexible, is increasingly becoming a kind of effective alternative.Therefore, it designs A kind of Wireless data acquisition unit being suitably applied the transmission of energy Internet of Things data also becomes the research and development focus of each manufacturer.

Utility model content

The purpose of this utility model is to provide a kind of Wireless data acquisition unit, can be applied to set with ammeter or heat pump etc. Standby energy Internet of Things realizes the transmission of acquisition data.

To achieve the goals above, the utility model takes following technical solution:

Wireless data acquisition unit, comprising: main control module, the main control module includes MCU, the carrier wave that is connected with the MCU Communication unit and the RS485 communication unit being connected with the MCU, the carrier communication unit are communicated with long-range system host Connection, the RS485 communication unit are connect with local payload communication；The communication module being connected with the main control module, it is described Communication module and long-range system host communicate to connect；For the power module that the main control module and the communication module are powered, The input terminal of the power module is electrically connected with city.

Further, the RS485 communication unit includes RS485 communication chip and isolation conversion circuit, the RS485 Communication chip is connected with the MCU, and the isolation conversion circuit is set between the RS485 communication chip and the MCU.

Further, the input terminal of the RS485 communication unit and output end are respectively arranged with electrostatic discharge protective circuit.

Further, power module includes switching power source chip, isolating transformer, the first rectification circuit, RC charge and discharge electricity Road, the second rectification circuit, third rectification circuit, the first filter circuit, the second filter circuit, the first reduction voltage circuit, the second decompression Circuit and third reduction voltage circuit；The input terminal of first rectification circuit and city are electrically connected, output end and the RC charge and discharge are electric Road is connected, and the output end of the RC charge-discharge circuit is connected with the input pin of the switching power source chip, the Switching Power Supply The output end of chip is connected with the input terminal of the isolating transformer, the independent power supply electricity of isolating transformer output two-way Pressure, wherein being exported all the way through second rectification circuit, the first filter circuit and first reduction voltage circuit logical to the RS485 Believe unit, another way is successively respectively through second reduction voltage circuit and the after the third rectification circuit, the second filter circuit Three reduction voltage circuits are exported to the MCU and the communication module.

Further, overvoltage crowbar is provided between first rectification circuit and the connecting pin of alternating current.

It further, further include the feedback regulating circuit being connected with the switching power source chip, the feedback regulating circuit It is connected simultaneously with the output end of the output end of the third rectification circuit and second filter circuit.

Further, the communication module is GPRS communication module or NB-IOT communication module or 4G communication module.

Further, the communication module further includes sim card connector, RF antenna port circuit and level shifting circuit, The level shifting circuit is connected between the communication module and the MCU, the RF antenna port circuit and aerial head phase Even.

Further, the main control module further includes the status display circuit being connected with the MCU, the status display electricity The connected LED light of the I/O pin of MCU described in Lu Weiyu.

From the above technical scheme, the Wireless data acquisition unit of the utility model is loaded by RS485 port processing Data, after the data of acquisition are carried out processing packing by main control module, by way of the wireless communications such as GPRS, NB-IOT, 4G or Data, are uploaded to the system host of main website by the mode of carrier communication, and administrative staff can be checked in real time by system host The operating status of each equipment, the Wireless data acquisition unit of the utility model can be compatible with communication, and compatibility is preferable, It installs, is easy to use, being inputted using the alternating current of 220V, without providing additional power supply, adapt to various working environments.

Detailed description of the invention

It, below will be to required in embodiment or description of the prior art in order to illustrate more clearly of the utility model embodiment The attached drawing used does simple introduction, it should be apparent that, the drawings in the following description are merely some embodiments of the present invention, For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings Other attached drawings.

Fig. 1 is the block diagram of the utility model embodiment；

Fig. 2 is the circuit diagram of the utility model embodiment main control module；

Fig. 3 is the block diagram of the utility model embodiment power module；

Fig. 4 is the circuit diagram of the utility model embodiment power module；

Fig. 5 is the block diagram of the utility model embodiment communication module.

Specific embodiment of the present utility model is described in more detail below in conjunction with attached drawing.

Specific embodiment

As shown in Figure 1, the Wireless data acquisition unit of the present embodiment includes power module, main control module and communication module, electricity Source module is that main control module and communication module are powered, and main control module passes through load (instrument or the sensing of communication interface and each node Device) communication connection, communication module and long-range system host communicate to connect.Power module, main control module and communication module are all set It is placed in collector shell (not shown), collector shell is preferably using the II type shell for meeting state's network mark standard, II type shell ruler It is very little smaller, and using the mounting means of guide rail structure, it is easily installed use.The load of each node sends collected data To main control module, main control module will be acquired after data processing is packaged, and be uploaded to communication module or in a manner of carrier wave system Host, the operating status of each equipment of administrative staff's real time inspection on system host.

Fig. 2 is the block diagram of main control module, as shown in Fig. 2, main control module includes that the MCU being set on circuit board, carrier wave are logical Believe unit and RS485 communication unit, further, main control module further includes status display circuit.The MCU of the present embodiment is used The model SWF2G11B chip of Zhuhai Zhonghui Microelectronics Co., Ltd., the included RTC clock of the MCU chip of the model and The Flash of 126K, support remote upgrade function, the chip simultaneously also have 4 UART bus interface, 1 road spi bus interface with And 2 road I2C bus interface, the I/O port of MCU can distribute required peripheral port by setting driving register, to meet Device resource needed for collector.MCU is connected by I2C bus with EEPROM (model FM24C512D), and EEPROM is for depositing Store up the facility informations such as the address parameter of equipment.Carrier communication unit (model WTTZ0431) is connected by UART bus with MCU, MCU can be communicated to connect in a manner of carrier communication with system host carrier communication unit.RS485 communication unit passes through UART Bus is connected with MCU, and MCU carries out data communication by the load of RS485 communication unit and local (each node).RS485 communication Unit includes RS485 communication chip, uses Shanghai Belling's company model for the RS485 communication chip of BL3085 in the present embodiment, The antistatic up to 18KV of the chip, good compatibility.It can further be arranged between RS485 communication chip and MCU and conversion is isolated Circuit, the isolation conversion circuit of the present embodiment are optocoupler (model EL816), and isolation conversion circuit can communicate MCU with RS485 Unit is isolated, and realizes data isolation transmission, and the level conversion between achievable 3.3V and 5V.RS485 communication unit Input terminal and output end are connected with RS485 equipment (load), further, input terminal and output in RS485 communication unit Electrostatic discharge protective circuit is respectively set in end, and electrostatic discharge protective circuit is made of a transient suppressor and a thermistor, in RS485 The input terminal of communication unit/output end series thermal-sensitive resistance, and transient suppressor is in parallel with thermistor, thus realize prevent it is quiet Electric protection avoids the electrostatic over-voltage of 485 ports from burning out MCU.The status display circuit of the present embodiment is two and is connected with MCU LED light, two LED are connected with two I/O pins of MCU respectively, and MCU exports different impulse levels by different I/O pins Corresponding LED light is driven, one of LED is used to show the operating status of collector, another LED light is for showing collector Communications status, the different working condition of collector is shown according to the different flashing states of LED light.

Fig. 3 is the block diagram of power module, as shown in figure 3, power module includes the Switching Power Supply core being set on circuit board Piece, isolating transformer, the first rectification circuit, RC charge-discharge circuit, the second rectification circuit, third rectification circuit, the first filtered electrical Road, the second filter circuit, the first reduction voltage circuit, the second reduction voltage circuit and third reduction voltage circuit, power module (the first rectified current Road) input terminal be electrically connected with the city 220V.Further, the input terminal of the power module of the present embodiment is provided with overvoltage protection electricity Road, as shown in connection with fig. 4, overvoltage crowbar include varistor (VAR1), safety capacitor (C22), power inductance (L2), first Fixed carbon resister (RA1) and the second fixed carbon resister (RN1), varistor and safety capacitor be connected to two connecting pins of alternating current (UL, UN between), Series power inductance and the first fixed carbon resister between a connecting pin (UL) of alternating current and the first rectification circuit, It connects between another connecting pin (UN) of alternating current and the first rectification circuit the second fixed carbon resister.First rectification circuit and RC charge and discharge Circuit is connected, and RC charge-discharge circuit is connected with the input pin of switching power source chip, and alternating current is carried out by the first rectification circuit After primary rectification and low-pass filtering, direct current is changed by exchange and is input to RC charge-discharge circuit.First rectification of the present embodiment Circuit forms full-bridge rectification mode using 4 rectifier diodes (D3, D4, D7, D8), and electric main is changed into direct current.RC Charge-discharge circuit include a high-voltage electrolytic capacitor (C23) and first, second, third and the 4th resistance that are sequentially connected in series (R32, R33, R35, R37), first, second, third and the 4th resistance it is in parallel with high-voltage electrolytic capacitor, RC charge-discharge circuit can be absorbed Peak voltage and electric current.Input too high voltages damage device in order to prevent, and the BP/M pin of switching power source chip is connected with pressure stabilizing Circuit, the other end of voltage regulator circuit are connected with the output end of RC charge-discharge circuit, and voltage regulator circuit includes voltage stabilizing chip (model TL431) and its peripheral circuit (capacitor C27 and resistance R42), voltage regulator circuit can be by voltage protections in a certain range.Switch The output end of power supply chip is connected with the input terminal of isolating transformer (T1), the model of the switching power source chip of the present embodiment TNY280GN-TL, the integrated chip power MOSFET of one 700V, and include that current limitation, overtemperature, over-voltage short circuit etc. are protected Protection circuit, maximum power dissipation 36.5W meet the power consumption requirements of collector.Forceful electric power and light current can be isolated for isolating transformer, The alternating current of input is by switching to 12V supply voltage after isolating transformer simultaneously, and is divided into two-way and independently exports, realization light current with it is weak It is isolated between electricity.The first output end and the second rectification circuit of isolating transformer, the first filter circuit, the first reduction voltage circuit are successively It is connected, the second rectification circuit and the first filter circuit carry out secondary rectification and smothing filtering to voltage, and 12V DC power supply is through first Reduction voltage circuit decompression is 5V, is the RS485 communication unit power supply in main control module；The second output terminal of isolating transformer successively passes through It is connected respectively with the second reduction voltage circuit and third reduction voltage circuit after third rectification circuit and the second filter circuit, third rectification circuit Secondary rectification and smothing filtering carried out to voltage with the second filter circuit, 12V DC power supply is respectively through the second reduction voltage circuit and the The decompression of three reduction voltage circuits is 3.3V and 3.9V, is MCU and communication module power supply.First reduction voltage circuit of the present embodiment uses model For the low pressure difference linear voltage regulator (LDO) of 78L05；Second reduction voltage circuit uses the low pressure difference linearity pressure stabilizing of model SW78L33 Device；Third reduction voltage circuit uses the DC-DC conversion chip of model MP2315, can by the enabled pin of DC-DC conversion chip Realize the opening and closing of power module；Second rectification circuit and third rectification circuit are by a Schottky diode and one Capacitor composition, the first filter circuit are the RC filter circuit being made of resistance and capacitor, and the second filter circuit is by inductance, resistance With the LC filter circuit of capacitor composition.It further include the feedback tune being connected with switching power source chip to increase the stability of power supply Economize on electricity road, feedback regulating circuit are connected with the output end of the output end of third rectification circuit and the second filter circuit simultaneously.Feedback Adjusting circuit includes sampling resistor (R41), optocoupler (model TLP781), voltage stabilizing chip (model TL431), the 5th resistance (R39) and the 6th resistance (R44), as shown in figure 4, sampling resistor is connected to the EN/UV pin of switching power source chip and BP/M draws Between foot；Two input terminals of optocoupler are connected with the EN/UV pin of switching power source chip and BP/M pin respectively, and two of optocoupler Output end is connected with the input terminal of the output end of third rectification circuit and voltage stabilizing chip respectively, and the output end of voltage stabilizing chip passes through respectively 6th resistance connects signal ground and is connected through the 5th resistance with the output end of the second filter circuit, and voltage stabilizing chip provides a reference Reference voltage (2.5V) adjusts by the 5th resistance and the 6th electric resistance partial pressure, output voltage stabilization is exported.

As shown in figure 4, communication module can be GPRS communication module or NB-IOT communication module or 4G communication module, mould is communicated Block is connected by UART bus with MCU (main control module), and main control module sends upstream data to system host by communication module. Further, communication module further includes sim card connector, RF antenna port circuit and level shifting circuit.Due to communication module Voltage be 1.8V, the level of MCU (main control module) is 3.3V, passes through level shifting circuit and realizes signal between two modules Communication.RF antenna port circuit is connected after impedance matching with aerial head, and antenna port circuit can also further comprise ESD electrostatic Guard period prevents electrostatic lightning stroke etc..

The collector of the utility model supports GPRS or NB-IOT or 4G and carrier communication, can replace difference according to demand Wireless communication module, while in main control module also have RS485 communication unit, can be communicated with RS485 equipment (load), Good compatibility；By isolating transformer, all strong and weak electricities, input/output terminal can be isolated, are suitable under complex environment It uses.

Above embodiments are only to illustrate the technical solution of the utility model rather than its limitations, although referring to above-mentioned implementation The utility model is described in detail in example, it should be understood by a person of ordinary skill in the art that still can be to this reality It is modified or replaced equivalently with novel specific embodiment, and is repaired without departing from any of the spirit and scope of the utility model Change or equivalent replacement, should all cover among the scope of the utility model.

Claims

1. Wireless data acquisition unit characterized by comprising

Main control module, the main control module include MCU, the carrier communication unit being connected with the MCU and are connected with the MCU RS485 communication unit, the carrier communication unit and long-range system host communicate to connect, the RS485 communication unit with Local payload communication connection；

The communication module being connected with the main control module, the communication module and long-range system host communicate to connect；

For the power module that the main control module and the communication module are powered, input terminal and the alternating current phase of the power module Even.

2. Wireless data acquisition unit as described in claim 1, it is characterised in that: the RS485 communication unit includes RS485 logical Believe that chip and isolation conversion circuit, the RS485 communication chip are connected with the MCU, the isolation conversion circuit is set to Between the RS485 communication chip and the MCU.

3. Wireless data acquisition unit as claimed in claim 1 or 2, it is characterised in that: the input terminal of the RS485 communication unit Electrostatic discharge protective circuit is respectively arranged with output end.

4. Wireless data acquisition unit as described in claim 1, it is characterised in that: power module include switching power source chip, every From transformer, the first rectification circuit, RC charge-discharge circuit, the second rectification circuit, third rectification circuit, the first filter circuit, Two filter circuits, the first reduction voltage circuit, the second reduction voltage circuit and third reduction voltage circuit；

The input terminal of first rectification circuit is electrically connected with city, output end is connected with the RC charge-discharge circuit, and the RC fills The output end of discharge circuit is connected with the input pin of the switching power source chip, the output end of the switching power source chip and institute The input terminal for stating isolating transformer is connected, and the isolating transformer exports the independent supply voltage of two-way, wherein all the way through described Second rectification circuit, the first filter circuit and first reduction voltage circuit are exported to the RS485 communication unit, and another way is through institute It is exported respectively through second reduction voltage circuit and third reduction voltage circuit to described after stating third rectification circuit, the second filter circuit MCU and the communication module.

5. Wireless data acquisition unit as claimed in claim 4, it is characterised in that: the connection of first rectification circuit and alternating current Overvoltage crowbar is provided between end.

6. Wireless data acquisition unit as claimed in claim 4, it is characterised in that: further include being connected with the switching power source chip Feedback regulating circuit, the feedback regulating circuit output end with the third rectification circuit and second filtered electrical simultaneously The output end on road is connected.

7. Wireless data acquisition unit as described in claim 1, it is characterised in that: the communication module be GPRS communication module or NB-IOT communication module or 4G communication module.

8. Wireless data acquisition unit as claimed in claim 6, it is characterised in that: the communication module further includes SIM card connection Device, RF antenna port circuit and level shifting circuit, the level shifting circuit be connected to the communication module and the MCU it Between, the RF antenna port circuit is connected with aerial head.

9. the Wireless data acquisition unit as described in claims 1 or 2 or 4 or 6 or 7 or 8, it is characterised in that: the main control module It further include the status display circuit being connected with the MCU, the status display circuit is to be connected with the I/O pin of the MCU LED light.

10. the Wireless data acquisition unit as described in claims 1 or 2 or 4 or 6 or 7 or 8, it is characterised in that: the RS485 is logical The input terminal and output end for believing unit are respectively arranged with electrostatic discharge protective circuit.