CN110888182A - Wireless transceiving system of power system weather station - Google Patents
Wireless transceiving system of power system weather station Download PDFInfo
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- CN110888182A CN110888182A CN201911035617.6A CN201911035617A CN110888182A CN 110888182 A CN110888182 A CN 110888182A CN 201911035617 A CN201911035617 A CN 201911035617A CN 110888182 A CN110888182 A CN 110888182A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01W—METEOROLOGY
- G01W1/00—Meteorology
- G01W1/02—Instruments for indicating weather conditions by measuring two or more variables, e.g. humidity, pressure, temperature, cloud cover or wind speed
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
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- Computer Networks & Wireless Communication (AREA)
- Environmental & Geological Engineering (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental Sciences (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention discloses a wireless transceiving system of a power system weather station, which relates to the technical field of weather monitoring and comprises a weather workstation and a plurality of wireless transceiving devices, wherein the wireless transceiving devices connected with the weather workstation are transmitting terminals, the rest wireless transceiving devices are receiving terminals, the transmitting terminals are connected with the receiving terminals through wireless transmission signals, and the weather workstation acquires weather information through a sensor and transmits the weather information to the transmitting terminals through RS 485; the wireless transceiver comprises a central processing unit, an LORA unit, a main clock unit, an RS485 interface and a USB-TTL interface. The invention provides a wireless transceiving system of a power system weather station, which realizes the interaction of weather information through wireless transmission and has high flexibility and low cost.
Description
Technical Field
The invention relates to the technical field of meteorological monitoring, in particular to a wireless transceiving system of a meteorological station of an electric power system.
Background
Based on the monitoring demand for local meteorological information, domestic converter stations and transformer stations are generally provided with small meteorological stations, and based on safety considerations, the small meteorological stations are generally arranged on the roofs of office areas far away from transformer equipment areas. However, personnel in the converter station and the transformer substation generally concentrate on a monitoring duty room in an equipment area, the monitoring duty room has a certain distance with an office area, and under the condition of severe weather, the personnel are difficult to go to a small-sized weather station installation point to check weather information. At present, the common practice is to transmit weather information from a workstation of a weather station to a computer of a monitoring duty room by using an ethernet or an RS485 bus, and to check the weather information by using a computer client in the monitoring duty room. When the monitoring on-duty room is far away from the meteorological station, the problems of high construction difficulty, high cost and the like exist in laying the RS485 bus, and when the monitoring on-duty room or the meteorological station changes places, the monitoring on-duty room or the meteorological station needs to be laid again, so that the scheme has poor flexibility.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a wireless transceiving system of a power system weather station, which realizes the interaction of weather information through wireless transmission and has high flexibility and low cost.
In order to achieve the above object, the present invention provides a wireless transceiving system for a power system weather station, which comprises a weather workstation and a plurality of wireless transceiving devices, wherein the wireless transceiving device connected to the weather workstation is a transmitting terminal, the other wireless transceiving devices are receiving terminals, the transmitting terminal is connected to the receiving terminals through wireless transmission signals, and the weather workstation acquires weather information through a sensor and transmits the weather information to the transmitting terminal through RS 485; the wireless transceiver comprises a central processing unit, an LORA unit, a main clock unit, an RS485 interface and a USB-TTL interface; the LORA unit is connected with the central processing unit through an SPI bus or a USART interface and is used for receiving or sending weather information; the main clock unit is connected with the central processing unit through an IIC bus and used for providing clock signals for the central processing unit; the RS485 interface and the USB-TTL interface are connected with the central processing unit through a USART interface and are used for carrying out information interaction on the meteorological information processed by the central processing unit and an external computer.
The wireless transceiving system of the power system weather station further comprises an EEPROM storage unit connected to the central processor through an IIC bus.
The wireless transceiving system of the power system weather station further comprises an SD card storage unit connected to the central processor through an SDIO interface.
The wireless transceiving system of the power system weather station further comprises a human-computer interaction unit connected to the central processor through a USART interface.
The wireless transceiving system of the power system weather station further comprises a temperature and humidity sensor connected to the central processing unit.
Compared with the prior art, the invention has the beneficial effects that: the invention utilizes a plurality of wireless receiving and transmitting devices to realize the meteorological information interaction between the meteorological stations in the converter station and the transformer substation and the monitoring duty room, and the scheme has the advantages of less hardware equipment, simple connection among all equipment, short construction time, low cost and high communication efficiency; the wireless transceiver can be used as a transmitting terminal and a receiving terminal, so that the universality of hardware is effectively improved.
Drawings
FIG. 1 is a schematic diagram of a wireless transceiving system of a weather station of an electric power system according to the present invention;
FIG. 2 is a schematic diagram of a wireless transceiver;
FIG. 3 is a flowchart illustrating the operation of the wireless transceiving apparatus for transmitting weather information;
FIG. 4 is a flowchart illustrating the operation of the wireless transceiver for receiving weather information.
Wherein: 1. a weather workstation; 2. a transmitting terminal; 3. a receiving terminal; 4. a central processing unit; 5. a LORA unit; 6. a master clock unit; 7. an RS485 interface; 8. a USB-TTL interface; 9. an EEPROM memory cell; 10. an SD card storage unit; 11. a human-computer interaction unit; 12. a temperature sensor.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Example (b):
referring to fig. 1 and 2, a power system weather station wireless transceiving system comprises a weather workstation 1 and a plurality of wireless transceiving devices, wherein the wireless transceiving devices can be used as a transmitting terminal 2 for sending weather information and a receiving terminal 3 for receiving the weather information, and the transmitting terminal 2 for sending the weather information is connected with the receiving terminal 3 for receiving the weather information through wireless transmission signals. The weather workstation 1 acquires weather information through a sensor or other weather physical quantity acquisition equipment and transmits the weather information to the wireless transceiver for sending the weather information through RS 485. The wireless transceiver comprises a central processing unit 4, an LORA unit 5, a main clock unit 6, an RS485 interface 7 and a USB-TTL interface 8; the LORA unit 5 is connected with the central processing unit 4 through an SPI bus or a USART interface and is used for receiving or sending weather information; the main clock unit 6 is connected with the central processing unit 4 through an IIC bus and used for providing clock signals for the central processing unit 4; the RS485 interface 7 and the USB-TTL interface 8 are connected with the central processing unit 4 through USART interfaces and used for carrying out information interaction on the meteorological information processed by the central processing unit 4 and an external computer. The transmitting terminal 2 and the receiving terminal 3 both use radio transmitting/receiving devices having the same configuration.
Preferably, the LORA unit 5 adopts a SEMTECH corporation SX1278 radio frequency chip, the working frequency band is 410-. LORA unit 5 supports the LORA spread spectrum technique, compares traditional 433 frequency channels communication, has farther communication distance, and the advantage that the interference killing feature is strong has extremely strong confidentiality simultaneously. The LORA unit 5 has a PA power amplifier and an LNA low noise amplifier, thereby improving communication stability. And an industrial-grade active temperature compensation crystal oscillator is adopted, so that the frequency stability and consistency of the LORA unit 5 are ensured. The LORA unit 5 supports three operation modes, namely fixed-point transmission, broadcast transmission and channel monitoring. When the battery is used for supplying power, the air wake-up mode is supported, so that the power consumption is greatly reduced. The LORA unit 5 has an FEC forward error correction function, and ensures communication stability. The LORA unit 5 transmission power may be adjusted in multiple stages by software.
Preferably, the main clock unit 6 provides accurate clock data for system operation, and the clock unit adopts a high-precision clock chip DS3231, the precision is +/-2 ppm within the range of 0 ℃ to +40 ℃, and the precision is +/-3.5 ppm within the range of-40 ℃ to +85 ℃.
Preferably, the USB-TTL interface 8 uses an industrial FT232R chip to convert the USART interface of the CPU into a USB interface, which is used to perform background communication with an external computer, monitor the working condition of the intelligent wireless transceiver, and implement functions such as a communication interface with the external computer.
Preferably, the RS485 interface 7 performs TTL level and RS485 level conversion through an SP485EE industrial chip, in order to ensure that the potential of the external device does not damage the internal components of the intelligent wireless transceiver and suppress common mode interference, the RS485 interface 7 performs signal isolation through a signal isolation chip, and the power isolation chip is used to isolate the power supply, and meanwhile, the RS485 interface has automatic flow direction control and can reduce the control overhead of CPU software.
Further, the central processing unit 4 is also connected with an EEPROM storage unit 9 through an IIC bus. The EEPROM storage unit 9 is used for storing the parameter information of the wireless transceiver and ensuring that important parameter information is not lost when the wireless transceiver is powered off.
Further, the central processing unit 4 is also connected with an SD card storage unit 10 through an SDIO interface. The SD card storage unit 10 is used to store weather information of a weather station and a time stamp of the weather information.
Further, the central processor 4 is also connected with a human-machine interaction unit 11(HMI unit) through a USART interface. Preferably, the HMI unit adopts a capacitive touch screen and has an intuitive man-machine exchange function. The HMI unit adopts an IPS liquid crystal display screen, the visual angle reaches 178 degrees, the color depth is 16 bits, and the resolution can be selected from various resolutions such as 800 × 480 or 1024 × 600 according to different application occasions. The HMI unit has a wide working temperature range and can normally work in a temperature range of-20 ℃ to +70 ℃.
Further, the central processing unit 4 is also connected with a temperature and humidity sensor 12. Preferably, the temperature and humidity sensor 12 adopts a temperature and humidity sensor DHT11 with calibrated digital signal output, and the precision humidity is ± 5% RH, the temperature is ± 2 ℃, the range humidity is 20-90% RH, and the temperature is 0-50 ℃. The temperature and humidity sensor is integrated in the wireless transceiver, so that whether the temperature condition of the meteorological workstation is consistent with the temperature condition of the position of the wireless transceiver can be known, and a real-time reference effect is achieved in the prevention test and operation of the power equipment.
As the wireless transceiver work flow of the transmitting terminal 2 is shown in figure 3, the wireless transceiver initializes the communication interface, the main clock unit 6, the EEPROM storage unit 9, the LORA unit 5 and the SD card storage unit 10 in sequence, the central processor 4 judges the timing of the main clock for 1 second, reads the data of the main clock unit 6 and updates the data to the HMI unit, sends the weather information inquiry command to the weather workstation 1 of the small weather station through the RS485 interface 7 after the accumulated timing reaches 60 seconds, when the RS485 interface 7 detects that the weather data is received, if the weather information is received, the weather information is forwarded through the LORA unit 5, the weather information is interpreted and updated to the HMI unit, the weather information data and the time stamp are stored to the SD card storage unit 10 and the history is updated and stored to the EEPROM storage unit 9.
The working flow of the wireless transceiver as the receiving terminal 3 is shown in fig. 4, the preorder initialization program is consistent with that of the transmitting terminal 2, the central processor 4 judges the timing of the main clock for 1 second, reads the data of the main clock unit 6 and updates the data to the HMI unit, sends the weather information inquiry command to the LORA unit 5 after the accumulative timing reaches 60 seconds, analyzes the data after detecting that the LORA unit 5 receives the weather information data, acquires effective weather information and updates the effective weather information to the HMI unit, and stores the weather information data and the time stamp in the SD card storage unit 10 and updates and stores the history in the EEPROM storage unit 9.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (5)
1. A power system weather station wireless transceiver system comprises a weather workstation (1) and a plurality of wireless transceiver devices, and is characterized in that the wireless transceiver device connected with the weather workstation (1) is a transmitting terminal (2), the rest wireless transceiver devices are receiving terminals (3), the transmitting terminal (2) is connected with the receiving terminals (3) through wireless transmission signals, and the weather workstation (1) acquires weather information through a sensor and transmits the weather information to the transmitting terminal (2) through RS 485; the wireless transceiver comprises a central processing unit (4), an LORA unit (5), a master clock unit (6), an RS485 interface (7) and a USB-TTL interface (8); the LORA unit (5) is connected with the central processing unit (4) through an SPI bus or a USART interface and is used for receiving or sending weather information; the main clock unit (6) is connected with the central processing unit (4) through an IIC bus and used for providing clock signals for the central processing unit (4); the RS485 interface (7) and the USB-TTL interface (8) are connected with the central processing unit (4) through a USART interface and used for carrying out information interaction on the meteorological information processed by the central processing unit (4) and an external computer.
2. The electric power system weather station wireless transmitting and receiving system according to claim 1, wherein the central processor (4) is further connected with an EEPROM storage unit (9) through an IIC bus.
3. The electric power system weather station wireless transceiving system according to claim 1, wherein the central processor (4) is further connected with an SD card storage unit (10) through an SDIO interface.
4. The electric power system weather station wireless transceiving system according to claim 1, wherein the central processor (4) is further connected with a human-computer interaction unit (11) through a USART interface.
5. The electric power system weather station wireless transmitting and receiving system according to claim 1, wherein the central processor (4) is further connected with a temperature and humidity sensor (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911035617.6A CN110888182A (en) | 2019-10-29 | 2019-10-29 | Wireless transceiving system of power system weather station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911035617.6A CN110888182A (en) | 2019-10-29 | 2019-10-29 | Wireless transceiving system of power system weather station |
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| CN110888182A true CN110888182A (en) | 2020-03-17 |
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| CN201911035617.6A Pending CN110888182A (en) | 2019-10-29 | 2019-10-29 | Wireless transceiving system of power system weather station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111505737A (en) * | 2020-04-14 | 2020-08-07 | 广州海睿信息科技有限公司 | Intelligent small-sized weather station |
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Application publication date: 20200317 |
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