CN211504457U - Intelligent lightning stroke counter based on SPD temperature change rate - Google Patents
Intelligent lightning stroke counter based on SPD temperature change rate Download PDFInfo
- Publication number
- CN211504457U CN211504457U CN202020189039.3U CN202020189039U CN211504457U CN 211504457 U CN211504457 U CN 211504457U CN 202020189039 U CN202020189039 U CN 202020189039U CN 211504457 U CN211504457 U CN 211504457U
- Authority
- CN
- China
- Prior art keywords
- temperature
- spd
- control circuit
- main control
- temperature sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
An intelligent lightning strike counter based on SPD temperature change rate, comprising: the temperature detection circuit, the master control circuit and the 485 communication module; the temperature detection circuit comprises a temperature sensor and a resistance sampling circuit, and the main control circuit comprises a programmable chip provided with an EEPROM (electrically erasable programmable read-Only memory); the temperature sensor is connected with the resistance sampling circuit, the temperature sensor is connected with the main control circuit, the main control circuit is connected with the 485 communication module, the lightning stroke counter is matched with the SPD for use, the surface temperature of the SPD is obtained through the temperature sensor and is input into the main control circuit, the main control circuit judges whether a lightning stroke event is generated or not through temperature change, the lightning stroke times are accumulated, and the lightning stroke data are output to a client through the 485 communication module.
Description
Technical Field
The utility model relates to a thunderbolt counter, especially an intelligence thunderbolt counter based on SPD temperature change rate.
Background
The existing lightning stroke counter generally adopts a Rogowski coil (Rogowski) as a lightning signal sensor, then converts the lightning signal into a pulsating direct current signal through a rectifying circuit, and in order to protect a post-stage circuit from being damaged by lightning, a photoelectric isolator is required to be added to realize the isolation of the lightning signal and the post-stage circuit. Because the lightning signal is directly collected, the following two defects exist: firstly, when the lightning signal is too large, the lightning stroke counter can be damaged; second, there is more severe electromagnetic interference.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an intelligence thunderbolt counter based on SPD temperature change rate, this thunderbolt counter uses with SPD is supporting, through SPD's temperature and temperature change rate, can gather SPD's surface temperature in real time, carries out the thunderbolt count through the mode of electric isolation, when having avoided lightning signal too big, leads to the thunderbolt counter to damage and reduce electromagnetic interference.
An intelligent lightning stroke counter based on SPD temperature change rate adopts the technical scheme that: the temperature detection circuit comprises a temperature detection circuit, a main control circuit and a 485 communication module; the temperature detection circuit comprises a temperature sensor and a resistance sampling circuit, and the main control circuit comprises a programmable chip provided with an EEPROM (electrically erasable programmable read-Only memory); the temperature sensor is connected with the resistance sampling circuit, the temperature sensor is connected with the main control circuit, and the main control circuit is connected with the 485 communication module.
This thunderbolt counter uses with SPD is supporting, be connected with SPD through the temperature sensor among the temperature-detecting circuit, temperature sensor gathers SPD's surface temperature in real time, temperature sensor's resistance changes along with the temperature, and input main control circuit after turning into the signal of telecommunication through resistance sampling circuit, main control circuit judges whether produce the thunderbolt and count through calculating the temperature rate of change on SPD surface, and export the thunderbolt data to the customer end through 485 communication module, 485 communication circuit can realize the parallelly connected and data communication of a plurality of on-line devices.
For better technical effect, the temperature sensor is preferably selected from NTC or PTC thermistor or PT series temperature detector or semiconductor temperature sensor or thermocouple, and the resistance sampling circuit can select resistance device.
In order to obtain better technical effect, the main control circuit preferably adopts a programmable chip provided with an EEPROM, the programmable chip is used for calculating and judging the temperature information acquired by the temperature detection circuit, experimental data shows that the surface temperature change rate of the SPD does not exceed 1 ℃/second under normal conditions, the error factor of the device is considered, if the surface temperature change rate of the SPD exceeds 2 ℃/second, a lightning stroke event can be considered to occur, the programmable chip can accumulate the lightning stroke times for 1 time and store the lightning stroke times into the EEPROM, and the function of saving the lightning stroke times in power failure can be realized.
In order to obtain better technical effect, the 485 communication module preferably adopts an SP3485E chip, and can realize parallel connection and data communication of a plurality of lightning stroke counters.
The utility model has the advantages that: the surface temperature of the SPD can be collected in real time, lightning stroke counting is carried out in an electric isolation mode, and the phenomenon that a lightning stroke counter is damaged and electromagnetic interference is reduced when lightning signals are too large is avoided.
Drawings
Fig. 1 is a schematic diagram of the circuit structure of the present invention, and fig. 2 is a schematic diagram of the circuit of the present invention.
Detailed Description
With reference to fig. 1 and fig. 2, the embodiment of the present invention is described in detail, and this embodiment can realize simultaneous lightning stroke counting for 4 SPDs.
In fig. 2, U1 is a programmable chip provided with an EEPROM, U2 is a 485 communication module, an SP3485E chip is selected, and a resistance sampling circuit is selected from R1, R2, R3, and R4.
SPD is connected with temperature sensor, temperature sensor is connected with the programmable chip that is equipped with EEPROM, temperature sensor gathers SPD's temperature information, temperature sensor's resistance changes along with the temperature, convert into the signal of telecommunication through resistance sampling circuit (R1, R2, R3 and R4) respectively and input master control circuit's EEPROM programmable chip U1's PA0, PA1, PA4 and PA5 pin, calculate SPD's temperature at this moment through the software and be T1 to accomplish a temperature acquisition. After a certain time interval, temperature acquisition is carried out again, and the temperature of the SPD at the moment is calculated to be T2 through a software. The value of T2-T1 is calculated by a programmable chip U1 provided with an EEPROM and is used as the temperature change rate of the SPD, so that the temperature change rate of the SPD is monitored and whether lightning stroke is generated or not is judged.
An RO pin of the 485 communication module U2 is connected to a PA3 of the U1, a DI pin of the 485 communication module U2 is connected to a PA2 of the U1, a RE pin and a DE pin are connected to a PA7 of the U1 after being short-circuited, an A pin of the U2 is connected to an A bus of an external 485 interface, a B pin of the U2 is connected to a B bus of the external 485 interface, 485 communication is achieved through an MODBUS protocol, and collected SPD temperature information can be uploaded to a server or an upper computer through the 485 interface J1B.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (3)
1. The utility model provides an intelligence thunderbolt counter based on SPD temperature rate of change which characterized in that: the method comprises the following steps: the temperature detection circuit, the master control circuit (3) and the 485 communication module (4); the temperature detection circuit comprises a temperature sensor (1) and a resistance sampling circuit (2), and the main control circuit (3) comprises a programmable chip provided with an EEPROM; the temperature sensor (1) is connected with the resistance sampling circuit (2), the temperature sensor (1) is connected with the main control circuit (3), and the main control circuit (3) is connected with the 485 communication module (4).
2. The intelligent lightning counter based on the SPD temperature change rate according to claim 1, characterized in that the temperature sensor (1) collects the temperature of the SPD surface in real time, the resistance value of the temperature sensor (1) changes with the temperature, and is converted into electric signals through the resistance sampling circuit (2) and then respectively input into the main control circuit (3), and the main control circuit (3) judges whether lightning stroke is generated and counts by calculating the temperature change rate of the SPD surface; the 485 communication module (4) can realize parallel connection and data communication of a plurality of lightning stroke counters.
3. The intelligent lightning strike counter based on the SPD temperature change rate according to claim 1, characterized in that the main control circuit (3) can collect the surface temperature of the SPD in real time, and the SPD temperature change rate is measured by calculating the difference between two sampling values at a certain time interval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020189039.3U CN211504457U (en) | 2020-02-20 | 2020-02-20 | Intelligent lightning stroke counter based on SPD temperature change rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020189039.3U CN211504457U (en) | 2020-02-20 | 2020-02-20 | Intelligent lightning stroke counter based on SPD temperature change rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211504457U true CN211504457U (en) | 2020-09-15 |
Family
ID=72401901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020189039.3U Active CN211504457U (en) | 2020-02-20 | 2020-02-20 | Intelligent lightning stroke counter based on SPD temperature change rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211504457U (en) |
-
2020
- 2020-02-20 CN CN202020189039.3U patent/CN211504457U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109254226B (en) | System and method for detecting long-distance interphase grounding short circuit fault | |
| CN203205851U (en) | Anti-thunder remote early warning monitoring box | |
| CN104237645A (en) | Online monitoring system and method for insulation state of substation DC system | |
| CN208459507U (en) | Arrester online monitoring system | |
| CN112003564B (en) | Distributed photovoltaic system branch power abnormity early warning method based on intelligent terminal | |
| CN103323646A (en) | Current sensor for electric vehicle and detecting method by means of same | |
| CN103499748A (en) | Online monitoring system of supercapacitor bank | |
| CN103454486A (en) | Lightning arrester performance parameter detecting device | |
| CN110850261A (en) | Online measurement circuit and measurement method | |
| CN211504457U (en) | Intelligent lightning stroke counter based on SPD temperature change rate | |
| CN204155435U (en) | A kind of wireless temperature acquisition system | |
| CN202794323U (en) | Thunder monitoring system and thunder monitoring terminal | |
| CN206479801U (en) | A kind of Temperature sampler and temperature monitoring system automatically configured at the scene | |
| CN211018245U (en) | Current monitoring circuit based on CP L D | |
| CN210721168U (en) | Temperature control system of oriented silicon steel continuous annealing unit | |
| CN112763884A (en) | Online junction temperature estimation system and method for power semiconductor device | |
| CN113162057A (en) | Intelligent ammeter box and control method thereof | |
| CN202002968U (en) | Electronic lightning stroke times collecting system of lightning arrester | |
| CN105842563A (en) | Method for rapid collection of electric quantum of feeder terminal device | |
| CN206431193U (en) | Monitoring alarm temporarily drops in line voltage | |
| CN109142932A (en) | A kind of monitoring of isolated neutral power supply system and protection system | |
| CN203643505U (en) | Single-phase intelligent electrical measuring instrument | |
| CN215218968U (en) | Non-contact electric energy measuring device suitable for energy internet | |
| CN218481590U (en) | Lightning arrester on-line monitoring circuit | |
| CN213817230U (en) | Circuit breaker controller with distribution circuit branch recognition function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |