CN113934973A - Temperature-sensitive cable state analysis method, device and system based on temperature resistance characteristic - Google Patents
Temperature-sensitive cable state analysis method, device and system based on temperature resistance characteristic Download PDFInfo
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Abstract
The invention discloses a temperature-sensitive cable state analysis method, a temperature-sensitive cable state analysis device and a temperature-sensitive cable state analysis system based on temperature resistance characteristics, wherein the analysis method comprises the following steps: acquiring a plurality of actual resistance values of the temperature sensing cable corresponding to a plurality of preset detection temperatures; according to the preset temperatures and the corresponding actual resistance values, a temperature resistance characteristic actual curve of the temperature sensing cable is obtained through piecewise fitting; comparing the temperature resistance characteristic actual curve of the temperature sensing cable with the temperature resistance characteristic standard curve, and determining the state of the temperature sensing cable according to the comparison result; the temperature-resistance characteristic-based temperature-sensing cable state analysis method further comprises a temperature-sensing cable circuit adjusting method; wherein the analysis device is adapted for use in the above analysis method; wherein the analysis system may perform the analysis method described above. The invention can improve the accuracy of the alarm signal of the temperature sensing cable and the automation degree of the analysis system.
Description
Technical Field
The invention relates to a temperature-sensitive cable state analysis method, device and system based on temperature resistance characteristics, and belongs to the technical field of temperature-sensitive cables.
Background
The temperature sensing cable is a device capable of detecting fire and outputting alarm signals, has the advantages of high sensitivity and convenience in installation, is widely applied to fire alarm of high-voltage transformers and reactors in transformer substations, and is an important means for protecting safe operation of transformer substation equipment. However, most temperature sensing cables work outdoors, and are subjected to high temperature and high humidity for a long time, so that the insulation performance is reduced, the temperature resistance characteristic cannot meet the requirement, the situation of false fire alarm is easily caused, and the judgment of substation workers is interfered.
At present, few researches are carried out on solutions for false alarm of the temperature sensing cable, and a small number of experts propose to optimize the working environment and improve the running reliability of the temperature sensing cable by changing the running environment, additionally installing anti-interference equipment and the like, but the method does not essentially solve the problem of false alarm. In order to solve the above problems, it is necessary to develop a method for evaluating a state of a temperature sensing cable so as to prevent a low-performance temperature sensing cable from being applied to a field.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a temperature-sensing cable state analysis method, a temperature-sensing cable state analysis device and a temperature-sensing cable state analysis system based on temperature resistance characteristics, which can improve the accuracy of a temperature-sensing cable alarm signal.
In order to achieve the above object, a first aspect of the present invention provides a method for analyzing a state of a temperature-sensitive cable based on temperature-resistance characteristics, including the steps of:
acquiring a plurality of actual resistance values of the temperature sensing cable corresponding to a plurality of preset detection temperatures;
according to a plurality of preset detection temperatures and a plurality of corresponding actual resistance values, a temperature resistance characteristic actual curve of the temperature sensing cable is obtained through piecewise fitting;
comparing the temperature resistance characteristic actual curve of the temperature sensing cable with the temperature resistance characteristic standard curve, and determining the state of the temperature sensing cable according to the comparison result;
the temperature-resistance characteristic-based temperature-sensing cable state analysis method further comprises a temperature-sensing cable circuit adjusting method.
Further, the preset plurality of detection temperatures TiCalculated by the following formula:
Ti＝Tmin+TG*i
wherein i is more than or equal to 0 and less than or equal to (T)max-Tmin)/TG，TminDetecting the temperature, T, for a predetermined minimum temperature sensing cablemaxDetecting the temperature, T, for a predetermined maximum temperature-sensitive cable0＝Tmin，
TGIs the temperature difference between adjacent detection temperatures;
preset temperature sensing cable fire alarm temperature TtsAnd a preset maximum natural environment temperature TtzThe temperature T is detected by the lowest temperature-sensing cableminAnd the preset highest temperature sensing cable detection temperature TmaxIn the meantime.
Further, the temperature-sensitive cable temperature-resistance characteristic actual curve is fitted through a formula (1):
wherein, TtjFor the fact that the temperature-sensing cable correspondsThe temperature of the mixture is controlled by the temperature,
is a pair of
Rounding down, R1jTo detect a temperature of TjActual resistance value R corresponding to the temperature sensing cable1(j+1)To detect a temperature of T(j+1)And the actual resistance value corresponding to the temperature sensing cable.
Further, the comparing the actual temperature resistance characteristic curve of the temperature sensing cable with the standard temperature resistance characteristic curve, and determining the state of the temperature sensing cable according to the comparison result includes:
when R is1z＞R2sIf the state grade of the temperature sensing cable is determined to be excellent, the temperature sensing cable is continuously used or the temperature sensing cable circuit is adjusted according to the temperature sensing cable circuit adjusting method;
when R is1z≤R2sWhen the temperature resistance characteristic actual curve of the temperature sensing cable meets the formula (2), determining that the state grade of the temperature sensing cable is good, and adjusting the temperature sensing cable circuit according to a method for adjusting the temperature sensing cable circuit;
when the temperature resistance characteristic actual curve of the temperature sensing cable cannot meet the formula (2) and/or the formula (3), determining that the state grade of the temperature sensing cable is poor, and replacing the temperature sensing cable;
wherein R is2sDetecting a temperature T for a temperature sensitive cabletsThen, the corresponding standard resistance value of the temperature sensing cable can be obtained by calculation according to a standard curve of the temperature resistance characteristic of the temperature sensing cable when the temperature sensing cable leaves the factory;
R10detecting a temperature T for a temperature sensitive cableminThen, the actual resistance value corresponding to the temperature sensing cable;
R1zdetecting a temperature T for a temperature sensitive cabletzThen, the corresponding actual resistance value of the temperature sensing cable can be obtained by calculation according to the temperature resistance characteristic actual curve formula (1) of the temperature sensing cable, namely F (T)tz)＝R1z；
U0The temperature sensing cable circuit power supply voltage value;
R0resistance value of the microcomputer processing mechanism;
R2is the resistance value of the terminal module;
and E is a voltage measurement accuracy value.
Further, the method for adjusting the temperature-sensitive cable circuit comprises the following steps: adjusting the resistance value of the microcomputer processing mechanism;
adjusting the resistance of the microprocessor includes adjusting the resistance to R02The resistance element is connected with the microcomputer processing mechanism in parallel; the resistance value R02Satisfies formula (4):
wherein R is1sDetecting a temperature T for a temperature sensitive cabletsThen, the corresponding actual resistance value of the temperature sensing cable can be obtained by calculation according to the temperature resistance characteristic actual curve formula (1) of the temperature sensing cable, namely F (T)ts)＝R1s。
Further, the method for adjusting the temperature-sensitive cable circuit comprises the following steps: adjusting the resistance value of the terminal module;
adjusting the resistance value of the terminal module comprises setting the resistance value to R22The resistance element of (a) is connected in series with the terminal module; the resistance value R22Satisfies formula (5):
wherein R is1sDetecting a temperature T for a temperature sensitive cabletsThen, the corresponding actual resistance value of the temperature sensing cable can be obtained by calculation according to the temperature resistance characteristic actual curve formula (1) of the temperature sensing cable, namely F (T)ts)＝R1s。
In a second aspect, the present invention provides a temperature-sensitive cable state analyzing apparatus based on temperature resistance characteristics, including:
the acquisition module is used for acquiring a plurality of actual resistance values of the temperature sensing cable corresponding to a plurality of preset temperatures;
the temperature resistance curve module is used for obtaining a temperature resistance characteristic actual curve of the temperature sensing cable by means of piecewise fitting according to a plurality of preset temperatures and a plurality of corresponding actual resistance values;
and the state determining module is used for comparing the temperature resistance characteristic actual curve with the temperature resistance characteristic standard curve and determining the state of the temperature sensing cable according to the comparison result.
In a third aspect, the present invention provides a temperature-sensing cable status analysis system based on temperature-resistance characteristics, including a temperature-sensing cable circuit; the temperature sensing cable circuit comprises a power supply, a terminal module, a temperature sensing cable and a microcomputer processing mechanism; the microcomputer processing mechanism is connected with a power supply in series; the temperature sensing cable is connected in parallel with a branch circuit formed by connecting the microcomputer processing mechanism and the power supply in series; the temperature sensing cable is connected with the terminal module in parallel;
the microcomputer processing mechanism executes the steps of the temperature sensing cable state analysis method to obtain the temperature sensing cable state.
Further, the microcomputer processing mechanism comprises a man-machine interaction unit and a wireless transmitting unit; the output end of the man-machine interaction unit is connected with the wireless transmitting unit.
Further, the device comprises a heating module and a control module; the control module comprises a wireless receiving unit and a control unit; the wireless receiving unit receives a transmitting signal of the wireless transmitting unit;
the output end of the wireless receiving unit is connected with the control unit;
the control unit is connected with the heating module;
the heating module is filled with a liquid medium.
Compared with the prior art, the invention has the following beneficial effects:
the method of the invention analyzes the state of the temperature sensing cable by fitting the temperature resistance characteristic actual curve of the temperature sensing cable and comparing the temperature resistance characteristic actual curve with the temperature resistance characteristic standard curve, can take corresponding measures in time according to the analysis result of the temperature sensing cable, can prolong the service life of the temperature sensing cable, and can improve the accuracy and precision of the alarm signal of the temperature sensing cable.
The system of the invention improves the automation degree of the system by arranging the microcomputer processing mechanism.
Drawings
FIG. 1 is a flow chart of a temperature-sensitive cable status analysis method based on temperature-resistance characteristics according to the present invention;
FIG. 2 is a schematic diagram illustrating the status division of the temperature sensing cable according to the present invention;
fig. 3 is a schematic diagram showing a circuit structure of the temperature sensing cable according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
The present embodiment provides a temperature-sensitive cable state analysis method based on temperature-resistance characteristics, referring to fig. 1, including the following steps:
acquiring a plurality of actual resistance values of the temperature sensing cable corresponding to a plurality of preset detection temperatures;
according to a plurality of preset detection temperatures and a plurality of corresponding actual resistance values, a temperature resistance characteristic actual curve of the temperature sensing cable is obtained through piecewise fitting;
comparing the temperature resistance characteristic actual curve of the temperature sensing cable with the temperature resistance characteristic standard curve, and determining the state of the temperature sensing cable according to the comparison result;
the temperature-resistance characteristic-based temperature-sensing cable state analysis method further comprises a temperature-sensing cable circuit adjusting method.
The temperature resistance characteristic actual curve of the temperature sensing cable is compared with the temperature resistance characteristic standard curve, and the comparison result is analyzed, so that the state of the temperature sensing cable is determined.
Example 2
On the basis of embodiment 1, the present embodiment provides a method for setting a plurality of preset detection temperatures, a method for fitting an actual temperature-resistance characteristic curve of a temperature-sensitive cable, a method for determining a state of a temperature-sensitive cable, and a method for adjusting a circuit of a temperature-sensitive cable.
One or more preset detection temperatures
Referring to fig. 2, a plurality of preset detected temperatures are calculated by the following equation:
Ti＝Tmin+TG*i
wherein i is more than or equal to 0 and less than or equal to (T)max-Tmin)/TG，TminDetecting the temperature, T, for a predetermined minimum temperature sensing cablemaxDetecting the temperature, T, for a predetermined maximum temperature-sensitive cable0＝Tmin，
TGIs the temperature difference between adjacent detection temperatures;
preset temperature sensing cable fire alarm temperature TtsAnd a preset maximum natural environment temperature TtzThe temperature T is detected by the lowest temperature-sensing cableminAnd the preset highest temperature sensing cable detection temperature TmaxIn the meantime.
Second, temperature-sensing cable temperature resistance characteristic actual curve
Fitting a temperature resistance characteristic actual curve of the temperature sensing cable by a formula (1):
wherein, TtjIs the actual temperature corresponding to the temperature sensing cable,
is a pair of
Rounding down, R1jTo detect a temperature of TjActual resistance value R corresponding to the temperature sensing cable1(j+1)To detect a temperature of T(j+1)And the actual resistance value corresponding to the temperature sensing cable.
Third, temperature sensing cable state
By comparing the temperature resistance characteristic actual curve with the temperature resistance characteristic standard curve, the method for determining the state of the temperature sensing cable according to the comparison result comprises the following steps:
when R is1z＞R2sIf the state grade of the temperature sensing cable is determined to be excellent, the temperature sensing cable is continuously used or the temperature sensing cable circuit is adjusted according to the temperature sensing cable circuit adjusting method;
when R is1z≤R2sWhen the temperature resistance characteristic actual curve of the temperature sensing cable meets the formula (2), determining that the state grade of the temperature sensing cable is good, and adjusting the temperature sensing cable circuit according to a method for adjusting the temperature sensing cable circuit;
when the temperature resistance characteristic actual curve of the temperature sensing cable cannot meet the formula (2) and/or the formula (3), determining that the state grade of the temperature sensing cable is poor, and replacing the temperature sensing cable;
wherein R is2sDetecting a temperature T for a temperature sensitive cabletsThen, the corresponding standard resistance value of the temperature sensing cable can be obtained by calculation according to a standard curve of the temperature resistance characteristic of the temperature sensing cable when the temperature sensing cable leaves the factory;
R10detecting a temperature T for a temperature sensitive cableminThen, the actual resistance value corresponding to the temperature sensing cable;
R1zdetecting a temperature T for a temperature sensitive cabletzThen, the corresponding actual resistance value of the temperature sensing cable can be obtained by calculation according to the temperature resistance characteristic actual curve formula (1) of the temperature sensing cable, namely F (T)tz)＝R1z；
U0The temperature sensing cable circuit power supply voltage value;
R0resistance value of the microcomputer processing mechanism;
R2is the resistance value of the terminal module;
and E is a voltage measurement accuracy value.
Fourth, adjust the temperature sensing cable circuit
On one hand, the method for adjusting the temperature sensing cable circuit comprises the following steps: adjusting the resistance value of the microcomputer processing mechanism;
adjusting the resistance of the microprocessor includes adjusting the resistance to R02The resistance element is connected with the microcomputer processing mechanism in parallel; the resistance value R02Satisfies formula (4):
on the other hand, the method for adjusting the temperature-sensing cable circuit comprises the following steps: adjusting the resistance value of the terminal module;
adjusting the resistance value of the termination module comprises connecting a resistance element with a resistance value of R22 in series with the termination module; the resistance value R22 satisfies formula (5):
wherein R is1sDetecting a temperature T for a temperature sensitive cabletsThen, the corresponding actual resistance value of the temperature sensing cable can be obtained by calculation according to the temperature resistance characteristic actual curve formula (1) of the temperature sensing cable, namely F (T)ts)＝R1s。
The temperature-sensitive cable state is classified by comparing the temperature-resistance characteristic actual curve with the temperature-resistance characteristic standard curve, and the temperature-sensitive cable with poor state is immediately replaced; the accuracy of the alarm signal of the temperature sensing cable with good and/or excellent state can be improved by adjusting the voltage value at two ends of the microcomputer processing mechanism and/or adjusting the resistance value of the terminal module, and the operation is simple and reliable.
Example 3
The present embodiment provides a temperature-sensitive cable status analysis device based on temperature resistance characteristics, which comprises
The acquisition module is used for acquiring a plurality of actual resistance values of the temperature sensing cable corresponding to a plurality of preset temperatures;
the temperature resistance curve module is used for obtaining a temperature resistance characteristic actual curve of the temperature sensing cable by means of piecewise fitting according to a plurality of preset temperatures and a plurality of corresponding actual resistance values;
and the state determining module is used for comparing the temperature resistance characteristic actual curve with the temperature resistance characteristic standard curve and determining the state of the temperature sensing cable according to the comparison result.
The specific function implementation of each functional module refers to the relevant content in the analysis method in embodiment 1 or 2.
Example 4
The present embodiment provides a temperature-sensitive cable status analysis system based on temperature-resistance characteristics, referring to fig. 3, including a temperature-sensitive cable circuit; the temperature sensing cable circuit comprises a power supply, a terminal module, a temperature sensing cable and a microcomputer processing mechanism; the microcomputer processing mechanism is connected with the power supply in series; the temperature sensing cable is connected in parallel with a branch circuit formed by connecting the microcomputer processing mechanism and the power supply in series; the temperature sensing cable is connected with the terminal module in parallel; the microcomputer processing mechanism executes the relevant contents in the analysis method of embodiment 1 or 2.
In the application of the embodiment, the microcomputer processing mechanism further comprises a man-machine interaction unit and a wireless transmitting unit; the output end of the man-machine interaction unit is connected with the wireless transmitting unit. The temperature sensing cable state analysis system based on the temperature resistance characteristic further comprises a heating module and a control module; the control module comprises a wireless receiving unit and a control unit; the wireless receiving unit receives a transmitting signal of the wireless transmitting unit; the output end of the wireless receiving unit is connected with the control unit; the control unit is connected with the heating module; the heating module is filled with a liquid medium such as water, but not limited thereto, so that the temperature sensitive cable is uniformly heated.
During the application, the detection temperature is preset through the man-machine interaction unit by a worker, the wireless transmitting unit transmits the temperature signal to the wireless receiving unit, the wireless receiving unit transmits the received temperature signal to the control unit, and the control unit controls the ambient temperature of the heating module for heating the temperature sensing cable according to the temperature signal.
The temperature resistance characteristics of the temperature sensing cable with different temperature gradients can be detected by arranging the heating module and the control unit; the detection temperature can be adjusted at any time according to the actual condition of the temperature sensing cable by arranging the man-machine interaction unit; the automation degree of the system is improved by arranging a microcomputer processing mechanism.
In conclusion, the method has the advantages of few steps, simple process and high feasibility, and can timely investigate the temperature sensing cable to be replaced and avoid accidents; the service life of the temperature sensing cable in the good state and the accuracy of the alarm signal can be improved by a simple and easy method; meanwhile, the accuracy of the temperature sensing cable alarm signal in the superior state can be improved; the system of the invention has simple operation and high automation degree.
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 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 present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A temperature-sensing cable state analysis method based on temperature resistance characteristics is characterized by comprising the following steps:
acquiring a plurality of actual resistance values of the temperature sensing cable corresponding to a plurality of preset detection temperatures;
according to a plurality of preset detection temperatures and a plurality of corresponding actual resistance values, a temperature resistance characteristic actual curve of the temperature sensing cable is obtained through piecewise fitting;
comparing the temperature resistance characteristic actual curve of the temperature sensing cable with the temperature resistance characteristic standard curve, and determining the state of the temperature sensing cable according to the comparison result;
the temperature-resistance characteristic-based temperature-sensing cable state analysis method further comprises a temperature-sensing cable circuit adjusting method.
2. The temperature-sensitive cable state analysis method based on temperature-resistance characteristics according to claim 1,
the preset multiple detection temperatures TiCalculated by the following formula:
Ti＝Tmin+TG*i
wherein i is more than or equal to 0 and less than or equal to (T)max-Tmin)/TG，TminDetecting the temperature, T, for a predetermined minimum temperature sensing cablemaxDetecting the temperature, T, for a predetermined maximum temperature-sensitive cable0＝Tmin，
TGIs the temperature difference between adjacent detection temperatures;
preset temperature sensing cable fire alarm temperature TtsAnd a preset maximum natural environment temperature TtzThe temperature T is detected by the lowest temperature-sensing cableminAnd the preset highest temperature sensing cable detection temperature TmaxIn the meantime.
3. The temperature-sensing cable state analysis method based on the temperature-resistance characteristic as claimed in claim 2, wherein the temperature-sensing cable temperature-resistance characteristic actual curve is fitted by a formula (1):
wherein, TtjIs the actual temperature corresponding to the temperature sensing cable,
is a pair of
Rounding down, R1jTo detect a temperature of TjActual resistance value R corresponding to the temperature sensing cable1(j+1)To detect a temperature of T(j+1)And the actual resistance value corresponding to the temperature sensing cable.
4. The method for analyzing the state of the temperature-sensitive cable according to claim 3, wherein the comparing the actual temperature-resistance characteristic curve of the temperature-sensitive cable with the standard temperature-resistance characteristic curve and the determining the state of the temperature-sensitive cable according to the comparison result comprises:
when R is1z＞R2sIf the state grade of the temperature sensing cable is determined to be excellent, the temperature sensing cable is continuously used or the temperature sensing cable circuit is adjusted according to the temperature sensing cable circuit adjusting method;
when R is1z≤R2sWhen the temperature resistance characteristic actual curve of the temperature sensing cable meets the formula (2), determining that the state grade of the temperature sensing cable is good, and adjusting the temperature sensing cable circuit according to a method for adjusting the temperature sensing cable circuit;
when the temperature resistance characteristic actual curve of the temperature sensing cable cannot meet the formula (2) and/or the formula (3), determining that the state grade of the temperature sensing cable is poor, and replacing the temperature sensing cable;
wherein R is2sDetecting a temperature T for a temperature sensitive cabletsThen, the corresponding standard resistance value of the temperature sensing cable can be obtained by calculation according to a standard curve of the temperature resistance characteristic of the temperature sensing cable when the temperature sensing cable leaves the factory;
R10detecting a temperature T for a temperature sensitive cableminThen, the actual resistance value corresponding to the temperature sensing cable;
R1zdetecting a temperature T for a temperature sensitive cabletzThen, the corresponding actual resistance value of the temperature sensing cable can be obtained by calculation according to the temperature resistance characteristic actual curve formula (1) of the temperature sensing cable, namely F (T)tz)＝R1z；
U0The temperature sensing cable circuit power supply voltage value;
R0resistance value of the microcomputer processing mechanism;
R2is the resistance value of the terminal module;
and E is a voltage measurement accuracy value.
5. The temperature-sensitive cable state analysis method based on the temperature-resistance characteristic as claimed in claim 4, wherein the temperature-sensitive cable circuit adjusting method comprises: adjusting the resistance value of the microcomputer processing mechanism;
adjusting the resistance of the microprocessor includes adjusting the resistance to R02The resistance element is connected with the microcomputer processing mechanism in parallel; the resistance value R02Satisfies formula (4):
wherein R is1sDetecting a temperature T for a temperature sensitive cabletsThen, the corresponding actual resistance value of the temperature sensing cable can be obtained by calculation according to the temperature resistance characteristic actual curve formula (1) of the temperature sensing cable, namely F (T)ts)＝R1s。
6. The temperature-sensitive cable state analysis method based on the temperature-resistance characteristic as claimed in claim 4, wherein the temperature-sensitive cable circuit adjusting method comprises: adjusting the resistance value of the terminal module;
adjusting the resistance value of the terminal module comprises setting the resistance value to R22The resistance element of (a) is connected in series with the terminal module; the resistance value R22Satisfies formula (5):
wherein R is1sDetecting a temperature T for a temperature sensitive cabletsThen, the corresponding actual resistance value of the temperature sensing cable can be obtained by calculation according to the temperature resistance characteristic actual curve formula (1) of the temperature sensing cable, namely F (T)ts)＝R1s。
7. A temperature sensing cable state analysis device based on temperature resistance characteristics is characterized by comprising:
the acquisition module is used for acquiring a plurality of actual resistance values of the temperature sensing cable corresponding to a plurality of preset temperatures;
the temperature resistance curve module is used for obtaining a temperature resistance characteristic actual curve of the temperature sensing cable by means of piecewise fitting according to a plurality of preset temperatures and a plurality of corresponding actual resistance values;
and the state determining module is used for comparing the temperature resistance characteristic actual curve with the temperature resistance characteristic standard curve and determining the state of the temperature sensing cable according to the comparison result.
8. A temperature sensing cable state analysis system based on temperature resistance characteristics is characterized by comprising a temperature sensing cable circuit; the temperature sensing cable circuit comprises a power supply, a terminal module, a temperature sensing cable and a microcomputer processing mechanism; the microcomputer processing mechanism is connected with a power supply in series; the temperature sensing cable is connected in parallel with a branch circuit formed by connecting the microcomputer processing mechanism and the power supply in series; the temperature sensing cable is connected with the terminal module in parallel;
the microcomputer processing means performs the steps of the temperature-sensitive cable state analyzing method according to any one of claims 1 to 7 to obtain the state of the temperature-sensitive cable.
9. The temperature-sensing cable state analyzing system based on the temperature-resistance characteristic of claim 8, wherein the microcomputer processing mechanism comprises a human-computer interaction unit and a wireless transmitting unit; the output end of the man-machine interaction unit is connected with the wireless transmitting unit.
10. The temperature-sensing cable state analyzing system based on the temperature-resistance characteristic of claim 8, comprising a heating module and a control module; the control module comprises a wireless receiving unit and a control unit; the wireless receiving unit receives a transmitting signal of the wireless transmitting unit;
the output end of the wireless receiving unit is connected with the control unit;
the control unit is connected with the heating module;
the heating module is filled with a liquid medium.
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