CN111063180A - Remote meter reading method based on LoRa - Google Patents
Remote meter reading method based on LoRa Download PDFInfo
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- CN111063180A CN111063180A CN201911230852.9A CN201911230852A CN111063180A CN 111063180 A CN111063180 A CN 111063180A CN 201911230852 A CN201911230852 A CN 201911230852A CN 111063180 A CN111063180 A CN 111063180A
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
Abstract
The invention provides a remote meter reading method based on LoRa, which comprises the steps that each meter is correspondingly provided with a meter reading terminal, the meter reading terminal is in communication connection with the meters through an RS485 protocol or a ModBus protocol, and the meter reading terminal reads meter data of the meters correspondingly arranged; providing a LoRa meter reading gateway, and sending a polling request frame to each meter reading terminal at regular time and waiting for the reply of the meter reading terminal by the LoRa meter reading gateway; after receiving the polling request frame, each meter reading terminal encrypts the read meter data through AES and transmits the encrypted meter data to the LoRa meter reading gateway; and the LoRa meter reading gateway sends the received meter reading data to the server. And the LoRa meter reading gateway sends the received meter reading data to the server to finish meter reading. A LoRa gateway of checking meter includes the data acquisition of multiple meter to a plurality of terminals of checking meter, has not only reduced the cost of data acquisition, has effectively prolonged communication distance and has strengthened the wall ability of wearing of signal in addition, receives environmental impact littleer.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of remote meter reading, in particular to a remote meter reading method based on LoRa.
[ background of the invention ]
Along with the development of internet of things, electric power, the artifical mode of checking meter of water conservancy and gas is also eliminated gradually, a large amount of record electric quantities, water yield and gas volume are too in the dispersion, it is accurate inadequately to lead to the record, it is long to consume time, low efficiency, in order to solve above problem, replace artifical remote meter reading also more and more generally be applied to in the energy consumption collection supervisory equipment, current collection equipment adopts wired Modbus485 communication mode to be connected to the collector more, often need long distance laying cable, piping lane electric well need punch the fluting, construction cost is huge.
The existing wireless products mostly adopt 2.4G or Sub-GHz ASK/FSK communication schemes, and although the problem of building punching and slotting is solved, the traditional wireless mode has limited communication distance and cannot realize wide-area coverage and compatibility with a low-power-consumption front-end collector.
Therefore, there is a need to provide an improved remote meter reading method to solve the above problems.
[ summary of the invention ]
The invention overcomes the defects of the prior art and provides a remote meter reading method based on LoRa.
In order to achieve the purpose, the invention adopts the technical scheme for solving the technical problems: the method comprises the following steps:
s1, correspondingly setting a meter reading terminal for each meter, wherein the meter reading terminal is in communication connection with the meters through an RS485 protocol or a ModBus protocol, and the meter reading terminal reads meter data of the meters correspondingly set;
s2, providing a LoRa meter reading gateway, and sending a polling request frame to each meter reading terminal at regular time and waiting for the reply of the meter reading terminal by the LoRa meter reading gateway;
s3, after receiving the polling request frame, each meter reading terminal encrypts the read meter reading data through AES and transmits the encrypted meter reading data to the LoRa meter reading gateway;
and S4, the LoRa meter reading gateway sends the received meter reading data to a server, if a certain part of meter reading terminals do not send meter reading data after the LoRa meter reading gateway continuously polls for preset times, the LoRa meter reading gateway considers that the part of meter reading terminals have offline faults, and the offline meter reading terminals are subjected to network access operation again after all meter reading terminals are polled.
Preferably, in step S2, the method further includes that the LoRa meter reading gateway sends a network access request to one or more meter reading terminals through the LoRa transmission mode, and determines the communication quality between the LoRa meter reading gateway and the meter reading terminals according to data frames replied by the meter reading terminals, and the LoRa meter reading gateway redistributes appropriate communication parameters to the meter reading terminals and uses the same set of communication parameters as the meter reading terminals.
Preferably, in step S3, the meter reading terminal includes a sensor, a sensor interface, an embedded MCU and an LoRa radio frequency transmitting and receiving circuit, which are connected in sequence, and a security chip of cryptographic algorithm connected to the embedded MCU, where the security chip of cryptographic algorithm encrypts meter data read by the sensor and sends the encrypted meter data to the LoRa meter reading gateway via the LoRa radio frequency transmitting and receiving circuit.
Preferably, in step S3, the meter reading terminal further includes an SMA interface and a rod antenna, and the rod antenna is connected to the LoRa radio frequency transmitting and receiving circuit through the SMA interface.
Preferably, the LoRa meter reading gateway is provided with a first communication antenna for receiving meter data of the meter reading terminal and a second communication antenna for sending a request frame to the meter reading terminal, and in step S2, the LoRa meter reading gateway sends the read meter data to the LoRa meter reading gateway through the LoRa transmission mode.
Preferably, in step S3, the LoRa meter reading gateway is connected to a router having a POE power supply function, and configured to provide a power supply of the LoRa meter reading gateway and implement data transmission between the LoRa meter reading gateway and the server.
Preferably, in step S4, the LoRa meter reading gateway is in communication connection with the server by using an MQTT communication mechanism, the LoRa meter reading gateway divides the received meter data into offline data and instant data according to TOPIC, if the LoRa meter reading gateway is in a communication disconnection state with the server, the LoRa meter reading gateway stores the polled meter data in a built-in database, the part of meter data is offline data, after the communication connection, the LoRa meter reading gateway sends the offline data to the MQTT browser one by one, if the LoRa meter reading gateway is in a good communication state with the server, the LoRa meter reading gateway directly sends the polled meter data to the MQTT browser, the part of meter data is instant data, and the server subscribes the offline data and the instant data from the MQTT browser to obtain the meter data.
Preferably, in step S4, the server includes a network outlet supporting a wired ethernet network and a mobile communication carrier network.
Compared with the prior art, the remote meter reading method provided by the invention has the following beneficial effects: through the loRa gateway of checking meter and the terminal of checking meter that is provided with loRa communication technology data of gathering the meter, realize that a loRa gateway of checking meter includes the data acquisition of multiple meter to a plurality of terminals of checking meter, not only reduced the cost of data collection, still effectively prolonged communication distance and strengthened the wall-piercing ability of signal, data encryption back transmission safe and reliable more, receive the environmental impact data of also can not losing behind the broken string.
[ description of the drawings ]
FIG. 1 is a schematic diagram of an architecture of a remote meter reading system according to the present invention;
FIG. 2 is a block diagram of a remote meter reading system according to the present invention;
FIG. 3 is a functional block diagram of a meter reading terminal provided by the present invention;
fig. 4 is a flowchart of the operation of the remote meter reading system provided by the present invention.
[ detailed description ] embodiments
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and fig. 2 in combination, fig. 1 is a schematic structural diagram of a remote meter reading system provided by the present invention, and fig. 2 is a block diagram of a meter reading terminal of the remote meter reading system provided by the present invention. The invention provides a remote meter reading system based on LoRa, which comprises:
the meter 1, meter 1 is any one in water gauge, ammeter, gas table and the hotlist, and is specific, meter 1 has still adopted the RS485 electric layer communication protocol design.
The meter reading terminal 2 is in communication connection with the meter 1 through an RS485 protocol, a ModBus protocol, or a DL/T645 protocol, reads meter data of the meter 1, and transmits the data to the outside by using a LoRa transmission mode, in other embodiments, the data may be transmitted to the outside by using a LPWAN transmission mode, where it is required to say that the LoRa transmission mode is long Range Radio (long Range Radio), the LPWAN transmission mode is a Low Power Wide-Area Network (Low-Power Wide-Area Network), and the two transmission modes are longer in transmission distance under the same Power consumption condition, and the communication distance may be extended by 3 to 5 times, so that the Low Power consumption and the long distance are unified.
LoRa meter reading gateway 3, LoRa meter reading gateway 3 with meter reading terminal 2 passes through LoRa transmission mode communication connection and receives the meter data of meter reading terminal 2 transmission, it is specific, LoRa meter reading gateway 3 still regularly to each meter reading terminal 2 sends the polling request frame and waits meter reading terminal 2's reply, in this embodiment, meter reading terminal 2 with the bandwidth that LoRa transmission mode between the LoRa meter reading gateway 3 adopted is 125kHz, and information rate is 293bps, adopts this kind of mode, and the information that can transmit is more, and transmission efficiency is high.
And the server 5 is in communication connection with the router 4, and is configured to receive meter data sent by the router 4, in other embodiments, the server 5 is connected to the LoRa meter reading gateway 3 through a mobile communication network and receives the meter data sent by the LoRa meter reading gateway 3.
LoRa meter reading gateway 3 is equipped with communication interface and SIM card socket, LoRa meter reading gateway 3 passes through communication interface with router 4 is connected, in the not good or wired network region that can not set up of network, LoRa meter reading gateway 3 will follow through the mobile communication network that the SIM card was paired meter reading terminal 2 collects LoRa meter reading gateway 3's meter data is external to be transmitted.
LoRa meter reading gateway 3 still is equipped with first communication antenna and second communication antenna, first communication antenna is used for receiving the meter data at the terminal of checking meter, the second communication antenna be used for to the terminal of checking meter sends the request frame, sets up dual communication antenna, and the meter data and the sending request frame that receive each terminal 2 of checking meter can go on simultaneously to the terminal 2 of checking meter, and work efficiency is higher, and is more preferred, can also choose directional panel antenna and directional yagi antenna for use, in order to improve the receipt the scope of the meter data at terminal 2 of checking meter LoRa gateway 3's shell has adopted full aluminium waterproof shielding shell, has superstrong environmental suitability, has still set up antenna installation interface, can change the antenna in a flexible way.
The server 5 is provided with a plurality of network outlets, the network outlets support a wired Ethernet and a mobile communication operator network, and data exchange between the server 5 and the LoRa meter reading gateway 3 can be realized more flexibly.
In this embodiment, the user establishes control through server 5 the control backstage of loRa meter reading gateway 3 to set up the address and the password that every meter reading terminal 2 corresponds, control at the control backstage loRa meter reading gateway 3 sends the request of logging in to appointed meter reading terminal 2 through loRa transmission mode, meter reading terminal 2 receives and verifies the password after the request of logging in, agrees to the network if the password is correct, does not reply the data frame if the password is wrong, according to the data frame that meter reading terminal 2 replied, judge loRa meter reading gateway 3 with meter reading terminal 2's communication quality, loRa meter reading gateway 3 redistributes suitable communication parameter for meter reading terminal 2 and use with the same set of communication parameter of meter reading terminal 2, accomplish LoRa meter reading gateway 3 with the pairing of meter reading terminal 2.
Referring to fig. 3, fig. 3 is a functional block diagram of a meter reading terminal according to the present invention. The meter reading terminal 2 comprises a sensor 21, a sensor interface 22, an embedded MCU23, an LoRa radio frequency transmitting and receiving circuit 24, an SMA interface 25, a rod antenna 26 and a Guomu algorithm security chip 27 connected with the embedded MCU23, wherein the sensor 21 transmits meter data to the embedded MCU23 through the sensor interface 22, and after the Guomu algorithm security chip 27 completes data encryption, the LoRa radio frequency transmitting and receiving circuit 24 transmits the encrypted meter data to the LoRa meter reading gateway 3 through the SMA interface 25 and the rod antenna 26.
It should be noted that, meter reading terminal 2 adopts the commercial power supply and guide rail type installation, and convenient the deployment, SMA interface 25 can expand the better external antenna of signal.
The LoRa meter reading gateway 3 is in communication connection with the server 5 through an MQTT communication mechanism, the LoRa meter reading gateway 3 divides received meter data into offline data and instant data according to TOPIC, if the LoRa meter reading gateway 3 is in a communication disconnection state with the server 5, the LoRa meter reading gateway 3 stores the polled meter data in a built-in database, the part of meter data is offline data, after the communication connection, the LoRa meter reading gateway 3 sends the offline data to the MQTT broker one by one, if the LoRa meter reading gateway 3 is in a good communication state with the server 4, the LoRa meter reading gateway 3 directly sends the polled meter data to the MQTT broker, the part of meter data is instant data, the server 4 subscribes the offline data and the instant data from the MQTT broker to obtain the meter data, and the safety and the orderliness of meter reading are effectively improved, data loss is prevented.
Referring to fig. 3, fig. 3 is a flowchart of a remote meter reading method according to the present invention. According to the scheme, the method comprises the following steps:
s1, correspondingly arranging a meter reading terminal for each meter, wherein the meter reading terminal is in communication connection with the meters through an RS485 electrical layer communication protocol, a ModBus protocol or a DL/T645 protocol, and reads meter data of the meters correspondingly arranged by the meter reading terminal;
s2, providing a LoRa meter reading gateway, establishing a control background for controlling the LoRa meter reading gateway by a user in the server, setting an address and a password corresponding to each meter reading terminal, the LoRa meter reading gateway is controlled in a control background to send a network access request to a specified meter reading terminal in a LoRa transmission mode, the meter reading terminal verifies the password after receiving the network access request, if the password is correct, the network access is agreed, if the password is wrong, the data frame is not replied, according to the data frame replied by the meter reading terminal, the communication quality between the LoRa meter reading gateway and the meter reading terminal is judged, the LoRa meter reading gateway redistributes proper communication parameters to the meter reading terminal and uses the same set of communication parameters with the meter reading terminal to complete the pairing of the LoRa meter reading gateway and the meter reading terminal, the LoRa meter reading gateway can regularly send polling request frames to all the meter reading terminals and wait for responses of the meter reading terminals;
s3, after receiving the polling request frame, each meter reading terminal encrypts the read meter reading data through AES and transmits the encrypted meter reading data to the LoRa meter reading gateway;
and S4, the LoRa meter reading gateway sends the received meter reading data to a server to finish meter reading, if a certain part of meter reading terminals do not send meter reading data after the LoRa meter reading gateway continuously polls for preset times, the LoRa meter reading gateway considers that the meter reading terminals of the part have offline faults, and the offline meter reading terminals are subjected to network access operation again after all the meter reading terminals are polled.
Compared with the prior art, the remote meter reading method provided by the invention has the following beneficial effects: through the loRa gateway of checking meter and the terminal of checking meter that is provided with loRa communication technology data of gathering the meter, realize that a loRa gateway of checking meter includes the data acquisition of multiple meter to a plurality of terminals of checking meter, not only reduced the cost of data collection, still effectively prolonged communication distance and strengthened the wall-piercing ability of signal, data encryption back transmission safe and reliable more, receive the environmental impact data of also can not losing behind the broken string.
The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.
Claims (8)
1. A remote meter reading method based on LoRa is characterized by comprising the following steps:
s1, correspondingly setting a meter reading terminal for each meter, wherein the meter reading terminal is in communication connection with the meters through an RS485 protocol or a ModBus protocol, and the meter reading terminal reads meter data of the meters correspondingly set;
s2, providing a LoRa meter reading gateway, and sending a polling request frame to each meter reading terminal at regular time and waiting for the reply of the meter reading terminal by the LoRa meter reading gateway;
s3, after receiving the polling request frame, each meter reading terminal encrypts the read meter reading data through AES and transmits the encrypted meter reading data to the LoRa meter reading gateway;
and S4, the LoRa meter reading gateway sends the received meter reading data to a server, if a certain part of meter reading terminals do not send meter reading data after the LoRa meter reading gateway continuously polls for preset times, the LoRa meter reading gateway considers that the part of meter reading terminals have offline faults, and the offline meter reading terminals are subjected to network access operation again after all meter reading terminals are polled.
2. The remote meter reading method according to claim 1, wherein in step S2, the LoRa meter reading gateway sends a network access request to one or more meter reading terminals through LoRa transmission, and determines the communication quality between the LoRa meter reading gateway and the meter reading terminals according to data frames replied by the meter reading terminals, and the LoRa meter reading gateway redistributes appropriate communication parameters to the meter reading terminals and uses the same set of communication parameters as the meter reading terminals.
3. The remote meter reading method according to claim 1, wherein in step S3, the meter reading terminal includes a sensor, a sensor interface, an embedded MCU and an LoRa radio frequency transmitting and receiving circuit, which are connected in sequence, and a security chip for cryptographic algorithm connected to the embedded MCU, wherein the security chip for cryptographic algorithm encrypts meter reading data read by the sensor and transmits the encrypted meter reading data to the LoRa radio frequency transmitting and receiving circuit.
4. The remote meter reading method according to claim 3, wherein in step S3, the meter reading terminal further comprises an SMA interface and a rod antenna, and the rod antenna is connected with the LoRa radio frequency transmitting and receiving circuit through the SMA interface.
5. The remote meter reading method according to claim 1, wherein the LoRa meter reading gateway is provided with a first communication antenna for receiving meter data of the meter reading terminal and a second communication antenna for sending a request frame to the meter reading terminal, and in step S2, the method further comprises the step of sending the read meter data to the LoRa meter reading gateway through the LoRa transmission mode by the meter reading terminal.
6. The remote meter reading method according to claim 1, wherein in step S3, the LoRa meter reading gateway is connected to a router having a POE power supply function, and is configured to provide a power supply to the LoRa meter reading gateway and enable data transmission between the LoRa meter reading gateway and the server.
7. The remote meter reading method according to claim 1, wherein in step S4, the LoRa meter reading gateway is in communication connection with the server by adopting an MQTT communication mechanism, the LoRa meter reading gateway divides the received meter reading data into off-line data and instant data according to TOPIC, if the LoRa meter reading gateway and the server are in a communication disconnection state, the LoRa meter reading gateway stores the polled meter data in a built-in database, the partial meter data is offline data, after communication connection, the LoRa meter reading gateway sends the offline data to the MQTT browser one by one, if the LoRa meter reading gateway and the server are in a good communication state, the LoRa meter reading gateway directly sends the polled meter reading data to the MQTT broker, the partial meter data is instant data, and the server subscribes the offline data and the instant data from the MQTT browser to acquire the meter data.
8. The remote meter reading method according to claim 1, wherein in step S4, the server includes a network outlet supporting a wired ethernet network and a mobile communication carrier network.
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| CN201911230852.9A CN111063180A (en) | 2019-12-05 | 2019-12-05 | Remote meter reading method based on LoRa |
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| CN201911230852.9A CN111063180A (en) | 2019-12-05 | 2019-12-05 | Remote meter reading method based on LoRa |
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Cited By (3)
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| CN112583928A (en) * | 2020-12-23 | 2021-03-30 | 宁波三星医疗电气股份有限公司 | Meter reading system and method adopting universal remote meter reading gateway |
| TWI781617B (en) * | 2020-05-28 | 2022-10-21 | 日商三菱電機股份有限公司 | Meter reading systems, servers and data collection programs |
| CN117061274A (en) * | 2023-10-12 | 2023-11-14 | 天津卓朗科技发展有限公司 | LORA remote control method and device for Ethernet communication |
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Application publication date: 20200424 |
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