CN212111557U - Multifunctional digital instrument based on LoRa technology - Google Patents
Multifunctional digital instrument based on LoRa technology Download PDFInfo
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- CN212111557U CN212111557U CN201922451434.4U CN201922451434U CN212111557U CN 212111557 U CN212111557 U CN 212111557U CN 201922451434 U CN201922451434 U CN 201922451434U CN 212111557 U CN212111557 U CN 212111557U
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Abstract
The utility model discloses a multifunctional digital instrument based on LoRa technology, which comprises a LoRa network controller connected with a plurality of LoRa terminal modules, each LoRa terminal module is correspondingly connected with a multifunctional digital instrument; the LoRa network controller comprises a LoRa gateway module, a LoRa network management server module and a data application server module which are connected in sequence; the multifunctional digital instrument comprises a main control board, a three-phase full-electric quantity measuring unit, an out-of-limit alarm output unit, a switching quantity input unit, a communication unit and a multi-path contact temperature measuring unit, wherein the three-phase full-electric quantity measuring unit, the out-of-limit alarm output unit, the switching quantity input unit, the communication unit and the multi-path contact temperature measuring. The utility model relates to a multi-functional digital instrument of portable, safe, effective, quick ad hoc network, the user can establish loRa/LoRaWAN wireless network fast, only needs to call the standard interface that the loRa ad hoc network provided can generate the wireless application solution of oneself fast, greatly increased protection range, the user only need be on the background server real-time supervision multi-functional digital instrument's relevant data.
Description
Technical Field
The utility model relates to a multi-functional digital instrument based on loRa technique can measure, the control unit as the electric quantity parameter in wide application substation automation, distribution network automation, district electric power control, industrial automation, intelligent building, intelligent distribution board, panel board, the cubical switchboard.
Background
With the continuous development of the digitization technology, more and more industrial automation instruments adopt the digitization technology, so that the production efficiency of industrial automation is greatly improved, and good economic benefits are brought to enterprises. In the actual use process, industrial automation instruments are mostly used for on-site on-line operation, and the working environment is generally severe, so that the practicability, networking performance, anti-interference performance and the like of the instruments are emphasized. In order to further improve the work precision of industrial automation instrument and meter, effectively be applied to the instrument and meter with the loRa technique on, can provide reliable guarantee for the normal work of instrument and meter. The LoRa technology is a wireless communication technology based on a spread spectrum modulation technology, has the characteristics of long transmission distance, low transmission power consumption, strong anti-interference performance and the like, and is gradually popularized and applied in the fields of environmental monitoring, industrial control and the like. LoRaWAN is a set of communication protocols and system architecture designed for LoRa long-distance communication networks. The Lora communication system generally comprises four parts, namely a terminal, a base station, a network server and an application server. A star network topology is adopted between the base station and the terminal, and single-hop transmission is used between the base station and the terminal due to the long-distance characteristic of LoRa. The terminal node can simultaneously send to a plurality of base stations, and the base stations forward LoRaWAN protocol data between the network server and the terminal, and respectively bear the LoRaWAN data on LoRa radio frequency transmission and TCP/IP.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a multi-functional digital instrument based on loRa technique, through the relevant information of this instrument real-time measuring equipment, the user need not to care about the specific process of establishing of loRa/loRaWAN wireless network, only needs to call the standard interface that loRa ad hoc network provided both can generate the wireless application solution of oneself fast, has shortened user's product development time and verification cycle greatly, improves user's experience.
The purpose of the utility model is realized by the following technical scheme.
A multifunctional digital instrument based on an LoRa technology comprises an LoRa network integrated controller, a LoRa terminal module and a multifunctional digital instrument;
the LoRa network controller is connected with a plurality of LoRa terminal modules, and each LoRa terminal module is correspondingly connected with a multifunctional digital instrument;
the LoRa network controller comprises a LoRa gateway module, a LoRa network management server module and a data application server module which are connected in sequence;
the multifunctional digital instrument comprises a main control board, a three-phase full-electric quantity measuring unit, an out-of-limit alarm output unit, a switching value input unit, a communication unit and a multi-path contact temperature measuring unit, wherein the three-phase full-electric quantity measuring unit, the out-of-limit alarm output unit, the switching value input unit, the communication unit and the multi-path contact temperature measuring unit.
To above-mentioned technical scheme, the utility model discloses still further preferred scheme:
preferably, the lora terminal module comprises a master control mcu chip, a radio frequency chip and a communication interface which are sequentially connected; through radio frequency chip network deployment between loRa module and the loRa module, the loRa module passes through radio frequency chip networking structure wireless connection with the gateway node.
Preferably, the LoRa network management server module is provided with a UI interface to configure the gateway module.
Preferably, the multifunctional digital instrument is connected with a communication interface of LoRa terminal equipment through a communication interface.
Preferably, the three-phase full-electric quantity measuring unit of the multifunctional digital instrument comprises a three-phase voltage transformer PT and a three-phase current transformer CT which are connected with a three-phase power supply, wherein a fuse is connected in series with a primary end of the three-phase voltage transformer PT, a fuse and a resistor are connected in series with a secondary end of the three-phase voltage transformer PT, and the secondary end of the three-phase voltage transformer PT is connected with the main control board; and the three-phase current transformer CT is connected with a ground wire of the switch cabinet through a wiring terminal.
Preferably, the out-of-limit alarm output unit on the main control board comprises three relays JD1, JD2 and JD.
Preferably, the switching value input unit on the main control board comprises a plurality of switching tubes connected in parallel, and a resistor and an LED lamp connected to the switching tubes.
Preferably, the communication unit on the main control board comprises an LoRa terminal module and a diode which are connected in parallel.
Preferably, the multi-path contact temperature measuring unit on the main control board comprises a plurality of contact temperature terminals.
Compared with the prior art, the utility model discloses an effect lies in:
the utility model discloses a specially for intelligent electric network demand and innovative design's a portable, safe, effective, quick ad hoc network's multi-functional digital instrument, through this ad hoc network multi-functional digital instrument, the user can establish loRa LoRaWAN wireless network fast, only needs to call the standard interface that loRa ad hoc network provided can generate the wireless application solution of oneself fast, greatly increased protection zone, the user only need be on the background server real-time supervision multi-functional digital instrument's relevant data.
Drawings
Fig. 1 is a block diagram of a multifunctional digital instrument system based on the LoRa technology of the present invention;
fig. 2 is a functional block diagram of a LoRa terminal module;
fig. 3 is a schematic diagram of a multifunctional digital meter.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a multifunctional digital instrument based on the LoRa technology includes an LoRa network centralized controller, an LoRa terminal module, and a multifunctional digital instrument; the LoRa network controller is connected with a plurality of LoRa terminal modules, and each LoRa terminal module is correspondingly connected with a multifunctional digital instrument; the LoRa network controller comprises a LoRa gateway module, a LoRa network management server module and a data application server module which are sequentially connected. The Lora gateway module is wirelessly connected with the LoRa terminal module by adopting a star network structure, and receives user data from the LoRa terminal module; the data application server module is connected with the LoRa network management server module in series, and the LoRa network management server module is connected with the LoRa gateway module in series.
Further, the LoRa network management server module provides a UI interface, configures the gateway module, and performs connectivity management, authentication management, and group management on the LoRa terminal module; the data application server module provides data push service and message subscription and publishing service for users.
As shown in fig. 2, the LoRa terminal module includes a mcu, a radio frequency chip, and a communication interface. The multifunctional digital instrument is connected with a communication interface of LoRa terminal equipment through the communication interface. Radio frequency chip and mcu are connected, through radio frequency chip network deployment between loRa module and the loRa module, and the loRa module passes through radio frequency chip network deployment wireless connection with the gateway node, receives the relevant data of multi-functional digital instrument measurement from loRa terminal module.
As shown in fig. 3, the multifunctional digital instrument includes a main control board, and a three-phase full-electric quantity measuring unit, an out-of-limit alarm output unit, a switching value input unit, a communication unit and a multi-path contact temperature measuring unit connected to the main control board.
The three-phase full-electric quantity measuring unit comprises a three-phase voltage transformer PT and a three-phase current transformer CT which are connected with a three-phase power supply, wherein a fuse is connected in series with a primary end of the three-phase voltage transformer PT, a fuse and a resistor are connected in series with a secondary end of the three-phase voltage transformer PT, and the secondary end of the three-phase voltage transformer PT is connected with the main control board; and the three-phase current transformer CT is connected with the ground wire of the switch cabinet through a wiring terminal. The out-of-limit alarm output unit comprises three relays JD1, JD2 and JD3 which are respectively connected to the main control board. The switching value input unit comprises a plurality of switching tubes connected in parallel, and a resistor and an LED lamp which are connected to the switching tubes. The communication unit comprises a LoRa terminal module and a diode which are connected in parallel with each other. The multi-path contact temperature measuring unit comprises a plurality of contact temperature terminals.
The multifunctional digital instrument can measure the three-phase or single-phase full-electric quantity of a return line or equipment in real time, three-phase UA, UB, UC and UN terminals are directly connected to a phase line and a neutral line of a voltage transformer PT through a fuse, and phase voltage and line voltage which can be measured through PT voltage transformation ratio are measured; IA. The IB, IC and IN terminals are directly connected to the phase and neutral wires of the CT current transformer, and the phase current and the line current can be measured through the CT current ratio. The specific measurement data includes:
(1) voltage: ua, Ub, Uc, Uab, Ubc, Uca, average voltage;
(2) current: ia. Ib, Ic, average current, leakage current;
(3) frequency: f;
(4) active power: pa, Pb, Pc, P;
(5) reactive power: qa, Qb, Qc, Q;
(6) apparent power: sa, Sb, Sc, S;
(7) power factor: PFa, PFb, PFc, PF;
(8) active electric energy: kWh.
Furthermore, a circuit breaker or a fuse is required to provide protection for the primary side of the PT, and if the rated capacity of the used PT is larger than 25VA, the fuse is also arranged on the secondary side of the PT; the CT should be connected to the DZ short-circuit terminal or the test box to ensure the safety of CT wiring.
The multifunctional digital instrument can realize multiple functions, and comprises three sets of out-of-limit alarm functions, wherein three sets of out-of-limit alarms DO1, DO2 and DO3 are connected with relays JD1 and JD2 to carry out protection output, parameters can select current, voltage, frequency, total power, power factor, unbalance, harmonic wave, total distortion and the like, and configurable DO1 and DO2 are driven to realize the out-of-limit alarm function according to set upper limit or lower limit alarm values.
The switching value input unit of the multifunctional digital instrument can be selectively matched with 1-way, 2-way, 3-way or 4-way switching value input, and can automatically determine the use of several ways according to the requirements of users for monitoring the state of an external passive contact. When the 1 path is selected, the input end DI1 is connected with a resistor R1 in series, a resistor R1 is connected with an on-off protection triode Q1 in series, and the Q1 is connected with a 24Vled lamp in series to a public end DIC; when two circuits are selected, DI2 is connected in series with resistor R2, R2 is connected in series with Q2, and Q2 is connected in series with 24Vled lamps to common DIC. In the same way as the connection mode of DI3 and DI4, the corresponding status of DI can be displayed on the panel of the device.
The communication function can be selectively matched with 1 path of RS-485, and the device can be accessed into various power monitoring networks to realize remote measurement, remote signaling and remote control. Modbus-RTU protocol: "9600, 8, E, 1". The baud rate can be selected: 2400, 4800, 9600, 19200, 38400; the parity bits are selectable odd and even.
The multifunctional digital instrument is connected with the LoRa terminal module through the communication unit, and real-time monitoring and wireless transmission of relevant data of a measurement object of the multifunctional digital instrument are achieved.
Wherein, the communication function can be selectively matched with 1 path of RS-485, and the device can be accessed into various power monitoring networks to realize remote measurement, remote signaling and remote control. Modbus RTU communication protocol. Communication baud rate support: 1200bps, 2400bps, 4800bps, 9600bps, 19200bps, 38400 bps.
The multifunctional digital instrument can realize the function of measuring the temperature of 9 paths of contacts, and comprises three paths of bus temperature, three paths of upper contact temperature and three paths of lower contact temperature. The contact temperature measuring module needs to set a wireless module address, the address range is 0-65536, and the addresses in the same area cannot be the same; an alarm temperature may be set, the temperature exceeding the alarm temperature triggering an alarm event. The data is communicated through the wireless module, and the wireless module is divided into battery power supply and coil power supply. The ultra-high temperature alarm, alarm temperature value can be set according to actual conditions.
How the LoRa network management server module performs connectivity management, authentication management, grouping management, integrity check, and gateway configuration may be performed by a method commonly used in the communication field, for example, performing authentication through password comparison, determining whether to allow a terminal node to connect according to whether the authentication is passed, performing grouping management on the terminal node through the location or application characteristic of the terminal node, performing integrity check through CRC check of a transmitted packet, and the like.
The LoRa terminal module is used for the connection of multi-functional digital instrument, provides the access ability of LoRa wireless network to multi-functional digital instrument. The LoRa module and the gateway node are networked through the radio frequency chip, the gateway node acquires a wireless data command on the host, a LoRa wireless network formed by the LoRa module is issued to the multifunctional digital instrument, the multifunctional digital instrument returns data to the gateway node through the LoRa wireless sensor network, the gateway node transmits the data to a user end through the LoRa network management service module and the user data application server module, the LoRa node module serves as a data transmission module in the ad hoc network, and is responsible for converting real-time acquisition data of the multifunctional digital instrument into wireless data to be transmitted and received, and troubles of wiring of users are eliminated.
The data application server module provides data push service and message subscription and publishing service for the user, and the user can acquire user data through standard HTTP POST and MQTT network protocols and send a user control signaling.
Although the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above embodiments, which are only illustrative, and those skilled in the art can make many forms without departing from the spirit and the scope of the present invention, which are within the scope of the present invention.
Claims (9)
1. A multifunctional digital instrument based on an LoRa technology is characterized by comprising an LoRa network integrated controller, a LoRa terminal module and a multifunctional digital instrument;
the LoRa network centralized controller is connected with a plurality of LoRa terminal modules, and each LoRa terminal module is correspondingly connected with a multifunctional digital instrument;
the LoRa network controller comprises a LoRa gateway module, a LoRa network management server module and a data application server module which are connected in sequence;
the multifunctional digital instrument comprises a main control board, a three-phase full-electric quantity measuring unit, an out-of-limit alarm output unit, a switching value input unit, a communication unit and a multi-path contact temperature measuring unit, wherein the three-phase full-electric quantity measuring unit, the out-of-limit alarm output unit, the switching value input unit, the communication unit and the multi-path contact temperature measuring unit.
2. The multifunctional digital instrument based on the LoRa technology of claim 1, wherein the LoRa terminal module comprises a master control mcu chip, a radio frequency chip and a communication interface which are sequentially connected; through radio frequency chip network deployment between loRa module and the loRa module, the loRa module passes through radio frequency chip networking structure wireless connection with the gateway node.
3. The multifunctional digital instrument based on the LoRa technology of claim 1, wherein the LoRa network management server module is provided with a UI interface to configure the gateway module.
4. The multifunctional digital instrument based on the LoRa technology of claim 1, wherein the multifunctional digital instrument is connected with a communication interface of a LoRa terminal device through the communication interface.
5. The multifunctional digital instrument based on the LoRa technology is characterized in that a three-phase full-electric quantity measuring unit of the multifunctional digital instrument comprises a three-phase voltage transformer PT and a three-phase current transformer CT which are connected with a three-phase power supply, wherein a fuse is connected in series with a primary end of the three-phase voltage transformer PT, a fuse and a resistor are connected in series with a secondary end of the three-phase voltage transformer PT, and the secondary end of the three-phase voltage transformer PT is connected with a main control board; and the three-phase current transformer CT is connected with a ground wire of the switch cabinet through a wiring terminal.
6. The multifunctional digital instrument based on the LoRa technology, as claimed in claim 1, wherein the out-of-limit alarm output unit on the main control board comprises three relays JD1, JD2 and JD 3.
7. The multifunctional digital instrument based on the LoRa technology of claim 1, wherein the switching value input unit on the main control board comprises a plurality of switching tubes connected in parallel, and a resistor and an LED lamp connected to the switching tubes.
8. The multifunctional digital instrument based on the LoRa technology of claim 1, wherein the communication unit on the main control board comprises a LoRa terminal module and a diode which are connected in parallel with each other.
9. The multifunctional digital instrument based on the LoRa technology, as claimed in claim 1, wherein the multi-way contact temperature measuring unit on the main control board comprises a plurality of contact temperature terminals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922451434.4U CN212111557U (en) | 2019-12-30 | 2019-12-30 | Multifunctional digital instrument based on LoRa technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922451434.4U CN212111557U (en) | 2019-12-30 | 2019-12-30 | Multifunctional digital instrument based on LoRa technology |
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| Publication Number | Publication Date |
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| CN212111557U true CN212111557U (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922451434.4U Active CN212111557U (en) | 2019-12-30 | 2019-12-30 | Multifunctional digital instrument based on LoRa technology |
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| TR01 | Transfer of patent right |
Effective date of registration: 20220331 Address after: 071600 No. 86, Huancheng North Road, dongliujie village, Anxin Town, Anxin County, Baoding City, Hebei Province Patentee after: Ruixin Technology (Hebei xiongan) Co.,Ltd. Address before: 710065 Room 303, block B, international electrical Center, No. 3, electronic West Street, Yanta District, Xi'an City, Shaanxi Province Patentee before: XI'AN ZHONGHENG TECHNOLOGY CO.,LTD. |
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