CN114184286A - Low-power-consumption wireless temperature measurement system and device for power cable and early warning method - Google Patents
Low-power-consumption wireless temperature measurement system and device for power cable and early warning method Download PDFInfo
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- CN114184286A CN114184286A CN202111561309.4A CN202111561309A CN114184286A CN 114184286 A CN114184286 A CN 114184286A CN 202111561309 A CN202111561309 A CN 202111561309A CN 114184286 A CN114184286 A CN 114184286A
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
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- G—PHYSICS
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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Abstract
The invention discloses a low-power-consumption wireless temperature measurement system, a low-power-consumption wireless temperature measurement device and an early warning method for a power cable, and belongs to the technical field of wireless temperature measurement. The system of the present invention comprises: the temperature sensor is attached to the surface of a point to be measured of the power cable and transmits an electric signal to the wireless temperature measuring device; the wireless temperature measuring device is used for performing signal enhancement processing on the wireless signals to obtain wireless signals subjected to signal enhancement processing and transmitting the wireless signals subjected to signal enhancement processing to the signal relay module; and the temperature monitoring module is used for determining the temperature data of the surface of the point to be measured of the power cable according to the temperature data signal of the surface of the point to be measured. The invention can be flexibly applied to various cable laying environments, has wide temperature measuring range, high precision and low operation power consumption, and obviously reduces the operation and maintenance use cost of the power cable surface temperature monitoring.
Description
Technical Field
The invention relates to the technical field of wireless temperature measurement, in particular to a low-power-consumption wireless temperature measurement system and device for a power cable and an early warning method.
Background
The power cable is taken as important urban electric energy transmission channel equipment, and the proportion of the consumption of the power cable in the whole power transmission is increased year by year. The temperature of the power cable can be increased due to the heat loss of the conductor, the loss of an insulating medium, the eddy current loss of a shielding layer and the influence of the laying environment in the electric energy transmission and operation process, the current-carrying capacity of the cable is limited, the insulation life of the cable can be influenced, the operation safety problem caused by overheating is solved, and the requirement for monitoring the temperature of the power cable in real time is urgent.
Because power cable quantity is big, the distance is long, lay the environment complicacy, can't cover comprehensively through artifical or patrol and examine the robot and carry out temperature patrol and examine, temperature sensing optical fiber is fine easy to break for the distributed optical fiber temperature measurement technique of commonly using, and bearing capacity is limited and high temperature resistant, is difficult to apply to abominable cable laying environment in a flexible way. The existing temperature measurement technology based on thermal resistors, thermocouples, infrared temperature detectors and the like mainly adopts metal wires to transmit signals, the metal wires are large in using amount, large in wiring difficulty and high in manufacturing cost, a temperature measurement terminal needs to adopt a commercial power or low-voltage direct-current power supply to supply power, and the metal wires are prone to generating induced overvoltage to damage the temperature measurement terminal, so that the existing temperature measurement technology is limited in power cable temperature monitoring application.
Disclosure of Invention
In order to solve the above problems, the present invention provides a low power consumption wireless temperature measurement system for a power cable, comprising:
the temperature sensor is attached to the surface of a point to be measured of the power cable and used for collecting temperature data of the surface of the point to be measured, generating a temperature data signal according to the temperature data, converting the temperature data signal into an electric signal and transmitting the electric signal to the wireless temperature measuring device;
the wireless temperature measuring device restores the electric signal from the temperature sensor into a temperature data signal of the surface of the point to be measured, encodes and modulates the temperature data signal to generate a wireless signal, performs signal enhancement processing on the wireless signal to obtain a wireless signal subjected to signal enhancement processing, and outputs the wireless signal subjected to signal enhancement processing; and
the temperature monitoring module demodulates and decodes the received wireless signals to acquire temperature data signals of the surface of the point to be measured, and determines the temperature data of the surface of the point to be measured of the power cable according to the temperature data signals of the surface of the point to be measured.
Optionally, the system further includes: and the signal relay module is used for carrying out amplitude amplification on the wireless signal subjected to the signal enhancement processing and transmitting the wireless signal subjected to the amplitude amplification to the temperature monitoring module.
Optionally, the temperature sensor is a patch thermocouple or a needle thermocouple.
Optionally, the wireless temperature measuring device includes:
the signal conditioning module receives the electric signal transmitted by the temperature sensor and restores the electric signal into a temperature data signal of the surface of the point to be measured;
a wireless communication module that encodes and modulates a temperature data signal to generate a wireless signal;
the antenna module is used for performing signal enhancement processing on the wireless signals to obtain wireless signals subjected to signal enhancement processing and transmitting the wireless signals subjected to signal enhancement processing to the signal relay module;
and the power supply module supplies power to the signal conditioning module, the wireless communication module and the antenna module.
Optionally, the interface used by the wireless communication module is a radio frequency RF wireless protocol interface.
Optionally, the signal conditioning module is connected to a signal line of the temperature sensor by using a waterproof connector.
Optionally, the antenna used by the antenna module is a subminiature version a interface radio frequency omnidirectional antenna.
Optionally, the signal transmission period of the wireless communication module is set to 10 seconds to 120 seconds.
Optionally, the system further includes a clock synchronization device, configured to periodically perform a clock synchronization process with the beidou satellite system;
time calibration is carried out on a local clock of the temperature monitoring module according to a clock synchronization process with the Beidou satellite system so as to generate a calibrated local clock of the temperature monitoring module;
and time calibration is carried out on the wireless temperature measuring device according to the calibrated local clock of the temperature monitoring module, so that the local clock of the wireless temperature measuring device and the calibrated local clock of the temperature monitoring module are synchronous in time.
Optionally, the communication module of the wireless temperature measuring device uses a low-power RF wireless protocol interface;
and the power module used by the wireless temperature measuring device supplies power to the wireless temperature measuring device.
Optionally, the number of temperature sensors is the same as the number of wireless temperature measuring devices, and each temperature sensor has an associated one of the wireless temperature measuring devices;
a signal relay module is connected with one or more wireless temperature measuring devices.
The invention also provides a temperature early warning method for the power cable, which comprises the following steps:
attaching a temperature sensor to the surface of a point to be measured of a power cable, collecting temperature data of the surface of the point to be measured, generating a temperature data signal according to the temperature data, and converting the temperature data signal into an electric signal;
restoring the electric signal into a temperature data signal on the surface of the point to be measured through a wireless temperature measuring device, coding and modulating the temperature data signal to generate a wireless signal, and performing signal enhancement processing on the wireless signal;
amplifying the wireless signal through a signal relay module to generate an amplified signal;
decoding the amplified signal through a temperature monitoring module to obtain decoded data, and determining a temperature value of the surface of a point to be measured of the power cable according to the decoded data;
and sending out early warning under the condition that the temperature value of the surface of the point to be measured meets the preset early warning condition.
Optionally, the preset early warning condition includes at least one of the following:
a threshold out-of-limit condition, a temperature difference value out-of-limit condition, and a temperature value trend out-of-limit condition.
The invention also provides a low-power consumption wireless temperature measuring device for the power cable, which is characterized by comprising the following components:
the signal conditioning module receives the electric signal transmitted by the temperature sensor and restores the electric signal into a temperature data signal of the surface of the point to be measured;
a wireless communication module that encodes and modulates a temperature data signal to generate a wireless signal;
the antenna module is used for performing signal enhancement processing on the wireless signals to obtain wireless signals subjected to signal enhancement processing and outputting the wireless signals subjected to signal enhancement processing;
and the power supply module supplies power to the signal conditioning module, the wireless communication module and the antenna module.
The invention also provides a low-power consumption wireless temperature measurement method for the power cable, which comprises the following steps:
attaching a temperature sensor to the surface of a point to be measured of a power cable, collecting temperature data of the surface of the point to be measured, generating a temperature data signal according to the temperature data, and converting the temperature data signal into an electric signal;
restoring the electric signal into a temperature data signal on the surface of the point to be measured through a wireless temperature measuring device, coding and modulating the temperature data signal to generate a wireless signal, and performing signal enhancement processing on the wireless signal;
amplifying the wireless signal through a signal relay module to generate an amplified signal;
and decoding the amplified signal through a temperature monitoring module to obtain decoded data, and determining the temperature value of the surface of the point to be measured of the power cable according to the decoded data.
Optionally, the method further comprises:
the temperature monitoring module determines the early warning state of the temperature monitoring module according to the temperature value of the surface of the point to be measured of the power cable, adjusts the temperature measuring period of the wireless temperature measuring device according to the early warning state, and enables the wireless temperature measuring device to operate in a low power consumption mode through the temperature measuring period.
The invention can be flexibly applied to various cable laying environments, has wide temperature measuring range, high precision and low operation power consumption, obviously reduces the operation and maintenance use cost of the power cable surface temperature monitoring, and improves the working efficiency and the informatization degree of the power cable temperature monitoring.
Drawings
FIG. 1 is a block diagram of the system of the present invention;
FIG. 2 is a diagram of a wireless temperature measurement device in the system of the present invention;
FIG. 3 is a flow chart of time synchronization in the method of the present invention;
FIG. 4 is a flow chart of the method of the present invention;
FIG. 5 is a flow chart of the early warning method of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
The invention provides a low-power consumption wireless temperature measurement system for a power cable, as shown in figure 1, comprising:
the temperature sensor is attached to the surface of a point to be measured of the power cable and used for collecting temperature data of the surface of the point to be measured, generating a temperature data signal according to the temperature data, converting the temperature data signal into an electric signal and transmitting the electric signal to the wireless temperature measuring device;
the wireless temperature measuring device restores the electric signal from the temperature sensor into a temperature data signal of the surface of the point to be measured, encodes and modulates the temperature data signal to generate a wireless signal, performs signal enhancement processing on the wireless signal to obtain a wireless signal subjected to signal enhancement processing, and outputs the wireless signal subjected to signal enhancement processing; and
the temperature monitoring module demodulates and decodes the received wireless signals to acquire temperature data signals of the surface of the point to be measured, and determines the temperature data of the surface of the point to be measured of the power cable according to the temperature data signals of the surface of the point to be measured.
Wherein the system further comprises: and the signal relay module is used for carrying out amplitude amplification on the wireless signal subjected to the signal enhancement processing and transmitting the wireless signal subjected to the amplitude amplification to the temperature monitoring module.
The temperature sensor is a patch type thermocouple or a needle type thermocouple.
Wherein, wireless temperature measuring device includes:
the signal conditioning module receives the electric signal transmitted by the temperature sensor and restores the electric signal into a temperature data signal of the surface of the point to be measured;
a wireless communication module that encodes and modulates a temperature data signal to generate a wireless signal;
the antenna module is used for performing signal enhancement processing on the wireless signals to obtain wireless signals subjected to signal enhancement processing and transmitting the wireless signals subjected to signal enhancement processing to the signal relay module;
and the power supply module supplies power to the signal conditioning module, the wireless communication module and the antenna module.
Wherein, the interface used by the wireless communication module is a radio frequency RF wireless protocol interface.
The signal conditioning module is connected to a signal wire of the temperature sensor through a waterproof connector.
The antenna used by the antenna module is a subminiature version A interface radio frequency omnidirectional antenna.
Wherein a signal transmission period of the wireless communication module is set to 10 to 120 seconds.
The system also comprises a clock synchronization device, a clock synchronization device and a clock synchronization device, wherein the clock synchronization device is used for periodically carrying out a clock synchronization process with the Beidou satellite system;
time calibration is carried out on a local clock of the temperature monitoring module according to a clock synchronization process with the Beidou satellite system so as to generate a calibrated local clock of the temperature monitoring module;
and time calibration is carried out on the wireless temperature measuring device according to the calibrated local clock of the temperature monitoring module, so that the local clock of the wireless temperature measuring device and the calibrated local clock of the temperature monitoring module are synchronous in time.
The communication module of the wireless temperature measuring device uses a low-power-consumption RF wireless protocol interface;
and the power module used by the wireless temperature measuring device supplies power to the wireless temperature measuring device.
Wherein the number of temperature sensors is the same as the number of wireless thermometers, and each temperature sensor has an associated one of the wireless thermometers;
a signal relay module is connected with one or more wireless temperature measuring devices.
The wireless temperature measuring device 1, as shown in fig. 2, includes a signal conditioning module 2, a wireless communication module 3, an antenna module 4, and a power module 5.
The signal conditioning module 2 converts and calculates an output signal of the temperature sensor to obtain a temperature value; the wireless communication module 3 encodes and modulates the temperature value; the antenna module 4 strengthens signal gain and improves anti-interference capability and transmission capability; the power module 5 is a rechargeable recyclable battery and is used for supplying power to the signal conditioning module 2, the wireless communication module 3 and the antenna module 4.
The temperature sensor 7 is a surface mount type/needle type thermocouple, can sense the temperature change in the range of-200 ℃ to 800 ℃, can be designed in a customized manner according to the outer diameter of the power cable 6, can be flexibly mounted in various laying environments, and can keep close contact with the outer surface of the power cable 6.
The sensor signal lead 8 is a signal wire with shielding and waterproof capabilities, and leads out a temperature sensor signal to the wireless temperature measuring device 9.
The protection grade of the wireless temperature measuring device 9 reaches IP55, a sensor signal lead is connected into the internal signal conditioning module 2 through a waterproof connector, the temperature can be accurately sensed, and the measuring precision is +/-0.5 ℃; the wireless communication module 3 of the wireless temperature measuring device 9 adopts a Zigbee/IEEE 802.15.4 low-power-consumption RF wireless protocol interface, supports a DSSS (Direct Sequence Spread Spectrum) Direct Sequence Spread Spectrum communication technology, is suitable for global ISM 2.4G frequency bands, and has good stability and safety; the antenna module 4 of the wireless temperature measuring device 9 is an SMA interface radio frequency omnidirectional antenna, and can transmit a distance of 200m at most in an unshielded environment; the wireless temperature measuring device 9 adopts low-power-consumption hardware, and the power module 5 can support the wireless temperature measuring device to normally operate for 2 years in a low-power-consumption working mode.
The signal relay module 10 establishes reliable connection with the wireless temperature measuring device 9 and the temperature monitoring module 11 through the wireless network 12, enhances the output signal of the wireless temperature measuring device 9 and then sends the enhanced output signal to the temperature monitoring module 11, and long-distance reliable transmission of monitoring data is achieved.
The wireless network 12 adopts a Zigbee/IEEE 802.15.4 low power consumption RF wireless protocol, uses a 2.4GHz frequency band, and supports low-rate bidirectional wireless communication.
The temperature monitoring module 11 receives temperature measurement data of each wireless temperature measuring device 9, manages each wireless temperature measuring device 9 which is in wireless network connection with the temperature monitoring module, and performs early warning analysis on the operating temperature of the power cable.
The management of the temperature monitoring module 11 to each wireless temperature measuring device 9 includes time synchronization management, communication management and monitoring data management.
In the time synchronization management process, as shown in fig. 3, the temperature monitoring module acquires Beidou time service satellite time information from the NTP time service server, the time information is periodically sent to each wireless temperature measuring device through the signal relay module via a wireless network, and the local time is automatically updated after each wireless temperature measuring device acquires the time information, so that the time synchronization management of the whole distributed wireless temperature measuring system is realized. The communication management is that the temperature monitoring module automatically allocates the communication address of the wireless temperature measuring device which is in wireless network connection with the temperature monitoring module, automatically records the physical address, and automatically sets the temperature data transmission period and the working mode of the wireless temperature measuring device. The monitoring data management is that the temperature monitoring module uniformly stores, analyzes and displays the monitoring data of each wireless temperature measuring device which is in wireless network connection with the temperature monitoring module.
The temperature data transmission period of the wireless temperature measuring device is 10-120 s. The working modes of the wireless temperature measuring device comprise a normal low-power consumption mode and an abnormal quick mode, the wireless temperature measuring device collects and transmits the temperature data of the measuring point once every 120s in the normal low-power consumption mode, and the wireless temperature measuring device collects and transmits the temperature data of the measuring point once in the abnormal quick mode according to the instruction of the temperature monitoring module.
The invention also provides a low-power consumption wireless temperature measurement method for the power cable, as shown in fig. 4, comprising:
attaching a temperature sensor to the surface of a point to be measured of a power cable, collecting temperature data of the surface of the point to be measured, generating a temperature data signal according to the temperature data, and converting the temperature data signal into an electric signal;
restoring the electric signal into a temperature data signal on the surface of the point to be measured through a wireless temperature measuring device, coding and modulating the temperature data signal to generate a wireless signal, and performing signal enhancement processing on the wireless signal;
amplifying the wireless signal through a signal relay module to generate an amplified signal;
and decoding the amplified signal through a temperature monitoring module to obtain decoded data, and determining the temperature value of the surface of the point to be measured of the power cable according to the decoded data.
The temperature monitoring module determines the early warning state of the temperature monitoring module according to the temperature value of the surface of the point to be measured of the power cable, adjusts the temperature measuring period of the wireless temperature measuring device according to the early warning state, and enables the wireless temperature measuring device to operate in the low power consumption mode through the temperature measuring period.
The method of the invention can be used for analysis and early warning;
the temperature monitoring module performs threshold analysis, temperature difference analysis and trend analysis on the surface temperature data of each cable measuring point;
the temperature monitoring module analyzes the early warning grade according to the surface temperature of each point to be measured of the cable and sets the working mode of the wireless temperature measuring device;
when the temperature measuring device is in a normal level, the temperature monitoring module sends a normal instruction, the wireless temperature measuring device receives the normal instruction and sets the working mode to be a normal low-power consumption mode, and temperature data of the measuring point are collected and transmitted once every 120 s;
when the general early warning level is reached, the temperature monitoring module sends a general early warning instruction, the wireless temperature measuring device receives the general early warning instruction and sets the working mode to be an abnormal fast mode, and the temperature data of the measuring point is collected and transmitted once every 60 seconds;
when the serious early warning level is reached, the temperature monitoring module sends out a serious early warning instruction, the wireless temperature measuring device receives the serious early warning instruction, sets the working mode to be an abnormal fast mode, and collects and transmits the temperature data of the measuring point once every 30 seconds;
and when the early warning level is particularly serious, the temperature monitoring module sends out a particularly serious early warning instruction, the wireless temperature measuring device receives the particularly serious early warning instruction and sets the working mode to be an abnormal fast mode, and the temperature data of the measuring point is collected and transmitted once every 10 s.
In the early warning analysis process, as shown in fig. 5, the temperature monitoring module performs threshold analysis early warning, temperature difference analysis early warning and trend analysis early warning on the power cable operating temperature data of each measuring point.
The threshold analysis early warning is thatiWireless temperature measuring devicetTemperature monitoring state value of timex i （t) And temperature allowable limit
And comparing to judge whether the operating temperature of the cable is abnormal or not, namely judging the formula as follows:
when the temperature is over-limit, the temperature monitoring module sends out early warning of threshold value over-limit.
The temperature difference analysis early warning is to monitor the temperature of two adjacent measuring pointsx i （t) Andx i+1 （t) Difference value of (D) and allowable limit value of temperature differenceɛAnd comparing to judge whether the operating temperature of the cable is abnormal or not, namely judging the formula as follows:
when the temperature difference is over-limit, the temperature monitoring module sends out early warning of the over-limit temperature difference.
Trend analysis early warning isiWireless temperature measuring devicetTemperature monitoring state value of timex i （t) Andt+△ttemperature monitoring state value of timex i （t+△t) Difference value of (D) and temperature change rate limit value
And comparing to judge whether the operating temperature of the cable is abnormal or not, namely judging the formula as follows:
and when the temperature is over-limit, the temperature monitoring module generates a trend over-limit early warning.
The temperature monitoring module carries out threshold value analysis early warning, temperature difference analysis early warning and trend analysis early warning on the power cable operation temperature data of each measuring point, and the working mode of the wireless temperature measuring device is set to be a normal low-power-consumption mode and an abnormal rapid model according to the early warning state.
The invention also provides a temperature early warning method for the power cable, which comprises the following steps:
attaching a temperature sensor to the surface of a point to be measured of a power cable, collecting temperature data of the surface of the point to be measured, generating a temperature data signal according to the temperature data, and converting the temperature data signal into an electric signal;
restoring the electric signal into a temperature data signal on the surface of the point to be measured through a wireless temperature measuring device, coding and modulating the temperature data signal to generate a wireless signal, and performing signal enhancement processing on the wireless signal;
amplifying the wireless signal through a signal relay module to generate an amplified signal;
decoding the amplified signal through a temperature monitoring module to obtain decoded data, and determining a temperature value of the surface of a point to be measured of the power cable according to the decoded data;
and sending out early warning under the condition that the temperature value of the surface of the point to be measured meets the preset early warning condition.
Wherein, the preset early warning condition comprises at least one of the following conditions:
a threshold out-of-limit condition, a temperature difference value out-of-limit condition, and a temperature value trend out-of-limit condition.
The wireless temperature measuring device synchronously transmits temperature data of the surface of the cable point to be measured to the temperature monitoring module;
the temperature monitoring module carries out threshold analysis on the power cable operation temperature data of the point to be measured, and sends out threshold out-of-limit early warning under the condition that the temperature value of the surface of the point to be measured meets the preset early warning condition of the allowable operation threshold;
the temperature monitoring module performs temperature difference analysis on the power cable operation temperature data of the adjacent points to be measured, and sends out temperature difference out-of-limit early warning under the condition that the temperature difference value of the surfaces of the two points to be measured adjacent to the points to be measured meets the preset temperature difference threshold early warning condition;
the temperature monitoring module carries out trend analysis on the power cable running temperature data of the point to be measured, and sends out a trend out-of-limit early warning when the temperature value change of the surface of the point to be measured meets the preset temperature change rate limit early warning condition.
The invention also provides a low-power consumption wireless temperature measuring device for the power cable, which comprises:
the signal conditioning module receives the electric signal transmitted by the temperature sensor and restores the electric signal into a temperature data signal of the surface of the point to be measured;
a wireless communication module that encodes and modulates a temperature data signal to generate a wireless signal;
the antenna module is used for performing signal enhancement processing on the wireless signals to obtain wireless signals subjected to signal enhancement processing and transmitting the wireless signals subjected to signal enhancement processing to the signal relay module;
and the power supply module supplies power to the signal conditioning module, the wireless communication module and the antenna module.
The invention can be flexibly applied to various cable laying environments, has wide temperature measuring range, high precision and low operation power consumption, obviously reduces the operation and maintenance use cost of the power cable surface temperature monitoring, and improves the working efficiency and the informatization degree of the power cable temperature monitoring.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The scheme in the embodiment of the application can be implemented by adopting various computer languages, such as object-oriented programming language Java and transliterated scripting language JavaScript.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (16)
1. A low-power wireless temperature measurement system for a power cable, the wireless temperature measurement system comprising:
the temperature sensor is attached to the surface of a point to be measured of the power cable and used for collecting temperature data of the surface of the point to be measured, generating a temperature data signal according to the temperature data, converting the temperature data signal into an electric signal and transmitting the electric signal to the wireless temperature measuring device;
the wireless temperature measuring device restores the electric signal from the temperature sensor into a temperature data signal of the surface of the point to be measured, encodes and modulates the temperature data signal to generate a wireless signal, performs signal enhancement processing on the wireless signal to obtain a wireless signal subjected to signal enhancement processing, and outputs the wireless signal subjected to signal enhancement processing; and
the temperature monitoring module demodulates and decodes the received wireless signals to acquire temperature data signals of the surface of the point to be measured, and determines the temperature data of the surface of the point to be measured of the power cable according to the temperature data signals of the surface of the point to be measured.
2. The wireless thermometry system of claim 1, wherein the system further comprises: and the signal relay module is used for carrying out amplitude amplification on the wireless signal subjected to the signal enhancement processing and transmitting the wireless signal subjected to the amplitude amplification to the temperature monitoring module.
3. The wireless thermometry system of claim 1, wherein the temperature sensor is a patch thermocouple or a pin thermocouple.
4. The wireless thermometry system of claim 1, wherein the wireless thermometry device comprises:
the signal conditioning module receives the electric signal transmitted by the temperature sensor and restores the electric signal into a temperature data signal of the surface of the point to be measured;
a wireless communication module that encodes and modulates a temperature data signal to generate a wireless signal;
the antenna module is used for performing signal enhancement processing on the wireless signals to obtain wireless signals subjected to signal enhancement processing and transmitting the wireless signals subjected to signal enhancement processing to the signal relay module;
and the power supply module supplies power to the signal conditioning module, the wireless communication module and the antenna module.
5. The wireless thermometry system of claim 4, wherein the interface used by the wireless communication module is a Radio Frequency (RF) wireless protocol interface.
6. The wireless thermometry system of claim 4, wherein the signal conditioning module is plugged into a signal line of the temperature sensor using a water-tight joint.
7. The wireless thermometry system of claim 4, wherein the antenna used by the antenna module is a subminiature version A interface radio frequency omni-directional antenna.
8. The wireless thermometry system of claim 4, wherein the signal transmission period of the wireless communication module is set to 10 seconds to 120 seconds.
9. The wireless temperature measurement system of claim 1, further comprising a clock synchronization device for periodically performing a clock synchronization process with the Beidou satellite system;
time calibration is carried out on a local clock of the temperature monitoring module according to a clock synchronization process with the Beidou satellite system so as to generate a calibrated local clock of the temperature monitoring module;
and time calibration is carried out on the wireless temperature measuring device according to the calibrated local clock of the temperature monitoring module, so that the local clock of the wireless temperature measuring device and the calibrated local clock of the temperature monitoring module are synchronous in time.
10. The wireless thermometry system of claim 1, wherein the wireless thermometry device has a communication module using a low power consumption RF wireless protocol interface;
and the power module used by the wireless temperature measuring device supplies power to the wireless temperature measuring device.
11. The wireless thermometry system of claim 2, wherein:
the number of temperature sensors is the same as the number of wireless temperature measuring devices, and each temperature sensor has an associated one of the wireless temperature measuring devices;
a signal relay module is connected with one or more wireless temperature measuring devices.
12. A temperature early warning method for a power cable, characterized by comprising:
attaching a temperature sensor to the surface of a point to be measured of a power cable, collecting temperature data of the surface of the point to be measured, generating a temperature data signal according to the temperature data, and converting the temperature data signal into an electric signal;
restoring the electric signal into a temperature data signal on the surface of the point to be measured through a wireless temperature measuring device, coding and modulating the temperature data signal to generate a wireless signal, and performing signal enhancement processing on the wireless signal;
amplifying the wireless signal through a signal relay module to generate an amplified signal;
decoding the amplified signal through a temperature monitoring module to obtain decoded data, and determining a temperature value of the surface of a point to be measured of the power cable according to the decoded data;
and sending out early warning under the condition that the temperature value of the surface of the point to be measured meets the preset early warning condition.
13. The method of claim 12, wherein the predetermined pre-warning condition comprises at least one of:
a threshold out-of-limit condition, a temperature difference value out-of-limit condition, and a temperature value trend out-of-limit condition.
14. A low-power consumption wireless temperature measuring device for a power cable, the wireless temperature measuring device comprising:
the signal conditioning module receives the electric signal transmitted by the temperature sensor and restores the electric signal into a temperature data signal of the surface of the point to be measured;
a wireless communication module that encodes and modulates a temperature data signal to generate a wireless signal;
the antenna module is used for performing signal enhancement processing on the wireless signals to obtain wireless signals subjected to signal enhancement processing and outputting the wireless signals subjected to signal enhancement processing;
and the power supply module supplies power to the signal conditioning module, the wireless communication module and the antenna module.
15. A low-power-consumption wireless temperature measurement method for a power cable is characterized by comprising the following steps:
attaching a temperature sensor to the surface of a point to be measured of a power cable, collecting temperature data of the surface of the point to be measured, generating a temperature data signal according to the temperature data, and converting the temperature data signal into an electric signal;
restoring the electric signal into a temperature data signal on the surface of the point to be measured through a wireless temperature measuring device, coding and modulating the temperature data signal to generate a wireless signal, and performing signal enhancement processing on the wireless signal;
amplifying the wireless signal through a signal relay module to generate an amplified signal;
and decoding the amplified signal through a temperature monitoring module to obtain decoded data, and determining the temperature value of the surface of the point to be measured of the power cable according to the decoded data.
16. The method of claim 15, further comprising:
the temperature monitoring module determines the early warning state of the temperature monitoring module according to the temperature value of the surface of the point to be measured of the power cable, adjusts the temperature measuring period of the wireless temperature measuring device according to the early warning state, and enables the wireless temperature measuring device to operate in a low power consumption mode through the temperature measuring period.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115371837A (en) * | 2022-10-25 | 2022-11-22 | 高勘(广州)技术有限公司 | Temperature detection method, device and system for power cable and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115371837A (en) * | 2022-10-25 | 2022-11-22 | 高勘(广州)技术有限公司 | Temperature detection method, device and system for power cable and storage medium |
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