CN117578359A - Automatic over-temperature and over-voltage protection device and method for power adapter - Google Patents
Automatic over-temperature and over-voltage protection device and method for power adapter Download PDFInfo
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Abstract
The invention relates to the technical field of circuit protection, in particular to an automatic over-temperature and over-voltage protection device and system of a power adapter, wherein the system comprises: the system comprises: the output judging module is used for acquiring the input voltage and the input current of the power adapter and the rated working power of the operation equipment and acquiring a standard output voltage; the voltage comparison module is used for collecting the actual output voltage of the power adapter in real time, comparing the actual output voltage with the standard output voltage and sending an overvoltage or temperature detection instruction; the temperature judging module is used for receiving the temperature detection instruction, detecting the real-time temperature of the power adapter and the temperature of the environment in real time, calculating a temperature correction coefficient, correcting the real-time temperature, drawing a temperature change diagram and sending an over-temperature protection instruction; and the protection module receives an overvoltage or overtemperature protection instruction and protects the power adapter. The invention improves the efficiency of the protection process of the power adapter.
Description
Technical Field
The invention relates to the technical field of circuit protection, in particular to an automatic over-temperature and over-voltage protection device and system of a power adapter.
Background
The circuit protection industry starts from the application of various fuses, and is gradually a necessary choice for high efficiency, safety and stability through the experiments and summaries of different protection theories and the boosting of the semiconductor era, and the industry is continuously developed forward along with the rising of emerging applications. At present, circuit protection products are mainly classified into non-semiconductor circuit protection electronic components, semiconductor circuit protection devices and circuit protection analog integrated circuits according to manufacturing processes and product forms. The circuit protection product is widely applied to the important fields of national economy such as industry and Internet of things, consumer electronics, new energy, network communication, automobiles and the like, the demand points of the fields on the circuit protection product are different, the functional requirements of the subdivision application scenes on the product are different, the degree of product diversity is higher, and the market layout is wider.
The patent document with the Chinese patent publication number of CN114567155A discloses a power adapter, an overcurrent protection circuit and electronic equipment, wherein a primary control chip in the power adapter is connected with a secondary protocol chip in an isolated manner; the primary control chip comprises a main control circuit, the power circuit controls the primary control circuit through the main control circuit, the secondary protocol chip comprises an overcurrent protection circuit, and the overcurrent protection circuit comprises a sampling sub-circuit, a control sub-circuit, a comparison sub-circuit, an anti-shake sub-circuit and a protection sub-circuit.
In the prior art, the output voltage and the running temperature of the power adapter exceed the normal range, so that the power adapter can be damaged, and the efficiency of a protection process is low by a traditional manual detection protection mode.
Disclosure of Invention
Therefore, the invention provides an automatic over-temperature and over-voltage protection device and system for a power adapter, which can solve the problem of improving the efficiency of the power adapter protection process by detecting the voltage and the temperature of the power adapter in the operation process and judging whether over-voltage and over-temperature protection is needed according to the detection result.
In order to achieve the above object, the present invention provides an automatic over-temperature and over-voltage protection device and system for a power adapter, comprising:
the output judging module is used for collecting input voltage and input current of the power adapter and rated working power of a plurality of operation devices connected with the power adapter, and obtaining standard output voltage of the power adapter by analyzing the input voltage, the input current and the rated working power;
the voltage comparison module is used for collecting the actual output voltage of the power adapter in the first period of time in real time, comparing the actual output voltage with the standard output voltage, sending an overvoltage protection instruction when the actual output voltage is larger than the standard output voltage, and sending a temperature detection instruction when the actual output voltage is smaller than or equal to the standard output voltage;
The temperature judging module is used for receiving the temperature detection instruction, detecting the real-time temperature of the power adapter and the real-time environment temperature of the power adapter in a second period in real time, calculating a temperature correction coefficient according to the real-time environment temperature, correcting the real-time temperature of the power adapter according to the temperature correction coefficient, drawing a temperature change diagram according to the corrected temperature, and sending an over-temperature protection instruction when the temperature change diagram is different from a preset temperature change diagram, wherein the duration of a first period is the same as that of the second period, the first period is arranged before the second period, and the first period is adjacent to the second period;
and the protection module is respectively connected with the voltage comparison module and the temperature judgment module and is used for receiving the overvoltage protection instruction or the over-temperature protection instruction and carrying out overvoltage or over-temperature protection on the power adapter.
Further, the output judging module comprises a data acquisition unit and a calculation unit, wherein,
the data acquisition unit is used for acquiring the input voltage of the power adapter through the voltmeter and the input end of the power adapter, and acquiring the input current of the power adapter through the ammeter;
The calculating unit is connected with the data acquisition unit, calculates the output power of the power adapter by multiplying the input voltage and the input current of the power adapter, calculates the output efficiency of the power adapter by dividing the rated working power of a plurality of running devices by the output power of the power adapter, and calculates the standard output voltage of the power adapter by the input voltage and the output efficiency of the power adapter.
Further, the voltage comparison module comprises a comparison unit and an instruction sending unit, wherein,
the comparison unit is used for acquiring the actual output voltage of the power adapter in the first period in real time through the voltage sensor, and comparing the actual output voltage with the standard output voltage to acquire a comparison result;
the command sending unit is connected with the comparing unit and used for sending an overvoltage protection command when the actual output voltage is larger than the standard output voltage and sending a temperature detection command when the actual output voltage is smaller than or equal to the standard output voltage.
Further, the temperature judging module comprises an instruction receiving unit, a temperature collecting unit, an environment temperature collecting unit, a calibration unit, a drawing unit, a comparing unit and an over-temperature instruction transmitting unit, wherein,
The instruction receiving unit is used for receiving the temperature detection instruction;
the temperature acquisition unit is connected with the instruction receiving unit and used for detecting the temperature of the power adapter in real time in the second period through a temperature sensor to obtain a plurality of temperature values;
the environment temperature acquisition unit is used for detecting the environment temperature of the power adapter in real time in the second period through the temperature sensor to acquire a plurality of environment temperature values;
the calibration unit is connected with the temperature acquisition unit and the environment temperature acquisition unit, and is used for calculating the average value of a plurality of temperature values and the average value of a plurality of environment temperature values, calculating a temperature correction coefficient through the average value of the temperature values and the average value of the environment temperature values, and calibrating the plurality of temperature values according to the temperature correction coefficient to obtain a plurality of calibration temperature values;
the drawing unit is connected with the calibration unit, a rectangular coordinate system taking the temperature value as a vertical axis and the time as a horizontal axis is established, and a plurality of calibration temperature values and corresponding time are drawn in the rectangular coordinate system in a dot form to obtain the temperature change diagram;
The comparison unit is connected with the drawing unit, calculates the coincidence degree of a temperature change curve in the temperature change diagram and a temperature change curve in the preset temperature change diagram, and compares the coincidence degree calculation result with the preset coincidence degree;
and the over-temperature instruction sending unit is connected with the comparison unit and sends the over-temperature protection instruction when the contact ratio calculation result is smaller than the preset contact ratio.
Further, the calibration unit comprises a mean value calculation subunit, a calibration coefficient calculation subunit and a calculation subunit, wherein
The average value calculation subunit is used for calculating the average value of a plurality of temperature values and the average value of a plurality of environment temperature values, and acquiring the average value of the temperature values and the average value of the environment temperature values;
the calibration coefficient calculating subunit is connected with the average value calculating subunit, and obtains the temperature correction coefficient through a formula k=t1/T2, wherein K is the temperature correction coefficient, T1 is the average value of the temperature values, and T2 is the average value of the environmental temperature values;
the calculating subunit is connected with the calibration coefficient calculating subunit, and a plurality of calibration temperature values are obtained by multiplying the temperature correction coefficient by a plurality of temperature values.
Further, the protection module comprises an instruction receiving unit, an overvoltage protection unit and an over-temperature protection unit, wherein,
the instruction receiving unit is used for receiving the overvoltage protection instruction and the overtemperature protection instruction;
the overvoltage protection unit is connected with the instruction receiving unit and is used for judging the overvoltage protection grade according to the actual output voltage when the instruction receiving unit receives the overvoltage protection instruction, and adopting corresponding overvoltage protection measures according to the grade;
the over-temperature protection unit is connected with the instruction receiving unit and is used for judging the over-temperature protection grade according to the calibrated temperature value when the instruction receiving unit receives the over-temperature protection instruction, and taking corresponding over-temperature protection measures according to the grade.
Further, the overvoltage protection unit comprises a grade judging subunit and an overvoltage protection subunit, wherein,
the grade judging subunit is used for calculating a voltage value difference value between the actual output voltage and the standard output voltage, and taking the voltage value difference value as a first-stage overvoltage protection when the voltage value difference value is larger than or equal to a preset voltage value difference value, and taking the voltage value difference value as a second-stage overvoltage protection when the voltage value difference value is smaller than the preset voltage value difference value;
The overvoltage protection subunit is connected with the grade judging subunit and is used for cutting off a power supply connected with the power adapter when the overvoltage protection grade is first-stage overvoltage protection, detecting and acquiring real-time working powers of a plurality of running devices connected with the power adapter in real time when the overvoltage protection grade is second-stage overvoltage protection, sequencing the real-time working powers according to the sizes of the running devices to acquire a power sequence, cutting off the running devices according to the power sequence, and stopping when the actual output voltage of the power adapter is smaller than or equal to the standard output voltage.
Further, the over-temperature protection unit comprises an over-temperature judgment subunit and an over-temperature protection subunit, wherein,
the over-temperature judging subunit is used for calculating a temperature value difference value between the calibration temperature value and a preset temperature value, and taking the temperature value difference value as a first-stage over-pressure protection when the temperature value difference value is larger than or equal to the preset temperature value difference value, and taking the temperature value difference value as a second-stage over-pressure protection when the temperature value difference value is smaller than the preset temperature value difference value;
the over-temperature protection subunit is connected with the over-temperature judgment subunit and is used for cutting off a power supply connected with the power adapter and a plurality of operation devices connected with the power adapter when the over-temperature protection grade is first-stage over-temperature protection, and starting a heat dissipation mechanism when the over-temperature protection grade is second-stage over-temperature protection so that the calibration temperature value is smaller than or equal to the preset temperature value.
Further, the heat dissipation mechanism comprises a condensation pipe group installed on the surface of the power adapter, the condensation pipe group is composed of eight condensation pipes, when the overtemperature protection level is the second overtemperature protection level, the temperature value difference value is judged to reach the time period of the preset temperature value difference value, if the time period is more than or equal to the preset time period, all the condensation pipe groups are started, and if the time period is less than the preset time period, three quarters of the condensation pipe groups are started.
Further, a method of an automatic over-temperature and over-voltage protection device for a power adapter, the method comprising:
collecting input voltage and input current of a power adapter and rated working power of a plurality of operation devices connected with the power adapter, and obtaining standard output voltage of the power adapter by analyzing the input voltage, the input current and the rated working power;
acquiring the actual output voltage of the power adapter in a first period of time in real time, comparing the actual output voltage with the standard output voltage, sending an overvoltage protection instruction when the actual output voltage is larger than the standard output voltage, and sending a temperature detection instruction when the actual output voltage is smaller than or equal to the standard output voltage;
Receiving the temperature detection instruction, detecting the real-time temperature of the power adapter and the real-time environment temperature of the power adapter in a second period in real time, calculating a temperature correction coefficient according to the real-time environment temperature, correcting the real-time temperature of the power adapter according to the temperature correction coefficient, drawing a temperature change diagram according to the corrected temperature, and sending an over-temperature protection instruction when the temperature change diagram is different from a preset temperature change diagram;
and receiving the overvoltage protection instruction or the over-temperature protection instruction, and performing overvoltage or over-temperature protection on the power adapter.
Compared with the prior art, the invention has the advantages that the output judging module is arranged to analyze the input voltage, the input current and the rated working power of the power adapter, obtain the standard output voltage of the power adapter, provide an accurate data basis for the subsequent judgment of whether the power adapter is overpressured or not, the voltage comparing module is arranged to detect the actual output voltage of the power adapter in real time, and timely send an overvoltage protection instruction when the actual output voltage exceeds the standard output voltage, thereby avoiding damage of the power adapter due to overvoltage, and protecting the operation equipment connected with the power adapter from being damaged by the overvoltage, and sending a temperature detection instruction when the actual output voltage is smaller than or equal to the standard output voltage, so as to monitor the temperature condition of the power adapter in real time, avoid damage caused by the excessive temperature of the power adapter, and correct the real temperature of the power adapter according to the real environment temperature, thereby being accurately corrected according to the real temperature of the power adapter, reflecting the real temperature of the power adapter, protecting the power adapter, or timely drawing the over-temperature protection instruction when the over-temperature is not corrected according to the preset temperature instruction, and the over-temperature instruction is arranged, the over-temperature protection instruction is prevented from being sent, the over-temperature protection instruction is prevented from being damaged due to the over-temperature of the power adapter, when the over-temperature is not being changed, the power adapter is timely protected, the over-temperature is protected, the temperature is prevented from being damaged due to the over-temperature of the power adapter, and the over-temperature is caused by the over temperature, and the power adapter is real temperature, and the temperature is calculated, therefore, the power adapter can be effectively protected, the service life of the power adapter is prolonged, and the safety of the power adapter in the use process is improved.
In particular, the data acquisition unit is connected with the input end of the power adapter through the voltmeter, acquires the input voltage of the power adapter, is connected with the input end of the power adapter through the ammeter, acquires the input current of the power adapter, accurately acquires the input voltage and the input current of the power adapter, provides accurate data for subsequent calculation, calculates the output power of the power adapter according to the input voltage and the input current through the calculation unit, then calculates the output efficiency of the power adapter according to the rated working power of the operation equipment, finally calculates the output voltage of the power adapter according to the input voltage and the output efficiency, accurately acquires the standard output voltage of the power adapter, provides accurate data basis for subsequent comparison, and is convenient for subsequent comparison and judgment.
In particular, the comparison unit is arranged to monitor the actual output voltage of the power adapter in real time and compare the actual output voltage with the standard output voltage, so that a comparison result is obtained, the comparison result is accurate, the instruction sending unit is arranged to send an overvoltage protection instruction when the actual output voltage is larger than the standard output voltage so as to protect the safety of the voltage of the power adapter, and when the actual output voltage is smaller than or equal to the standard output voltage, a temperature detection instruction is sent to timely detect and process the temperature of the power adapter, so that the safety performance of the power adapter is effectively protected.
In particular, by setting the instruction receiving unit to receive the temperature detection instruction, the efficiency of the detection process is improved, the subsequent real-time detection of the temperature of the power adapter is realized, by setting the temperature acquisition unit to detect the temperature of the power adapter in real time in a second period through the temperature sensor, a plurality of temperature values are obtained, the real-time temperature of the power adapter is accurately obtained, accurate data are provided for subsequent temperature calibration and drawing, by setting the environmental temperature acquisition unit to detect the environmental temperature of the power adapter in real time, the real-time temperature of the environment where the power adapter is located is accurately obtained, accurate data are provided for subsequent temperature calibration, by setting the calibration unit to calculate a temperature correction coefficient and a plurality of calibration temperature values, the influence of the environmental temperature on the temperature of the power adapter is eliminated, the accuracy of the temperature detection is improved, the basis of the subsequent processing data is accurate, the temperature change map is obtained through setting the comparison unit to intuitively understand the temperature change condition of the power adapter, the subsequent comparison and judgment are convenient, the comparison and judgment are carried out by setting the comparison unit to calculate the temperature change in the temperature change map and the preset temperature change map and the environment temperature change map, the comparison result is calculated to be coincident with the preset temperature change map, the actual condition is prevented from the power adapter, the actual condition is detected, the condition is coincident with the actual condition is avoided when the power adapter is detected, the power adapter is in the condition of the condition is in which is coincident with the normal condition, prolonging the service life of the product.
In particular, by setting the mean value calculation subunit, the mean value of the temperature value and the mean value of the ambient temperature value are obtained, the data error caused by the error in the measurement process is avoided, the accuracy of the temperature value and the ambient temperature value is improved by calculating the mean value, the temperature correction coefficient is obtained by setting the calibration coefficient calculation subunit, the influence of the ambient temperature on the temperature of the power adapter is eliminated, the subsequent calibration temperature value data is accurate, the calculation subunit is set to obtain a plurality of calibration temperature values, accurate data support is provided for drawing the subsequent temperature change diagram, the temperature change diagram is accurate, the normal work of the power adapter is guaranteed, the faults such as over-temperature are avoided, and the service life of the power adapter is prolonged.
In particular, by setting the level judging subunit to take different protection measures according to overvoltage conditions of different levels, the power adapter and connected equipment are better protected, the efficiency of a protection process is improved, by setting the overvoltage protection subunit to take corresponding protection measures according to the overvoltage protection level, when the overvoltage protection level is the first level overvoltage protection, the power supply connected with the power adapter is cut off, the power adapter and the operation equipment connected with the power adapter are effectively prevented from being damaged due to overvoltage, when the overvoltage protection level is the second level overvoltage protection, the real-time detection is carried out to obtain the real-time working power of a plurality of operation equipment connected with the power adapter, the real-time working power is sequenced from large to small, the operation equipment is cut off according to the power sequence, the actual output voltage of the power adapter is smaller than or equal to the standard output voltage, the operation equipment is cut off in a targeted manner according to the actual situation, the number of the operation equipment damaged due to overvoltage is reduced, the normal operation of the power adapter is ensured, the service life of the power adapter and the operation equipment connected with the power adapter is prolonged, and the safety in the operation process of the power adapter is improved.
Drawings
Fig. 1 is a second block diagram of an automatic over-temperature and over-voltage protection device for a power adapter according to an embodiment of the present invention;
FIG. 2 is a block diagram of a second configuration of an automatic over-temperature and over-voltage protection device for a power adapter according to an embodiment of the present invention;
FIG. 3 is a third block diagram of an automatic over-temperature and over-voltage protection device for a power adapter according to an embodiment of the present invention;
fig. 4 is a flowchart of a method for providing an automatic over-temperature and over-voltage protection device for a power adapter according to an embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, an embodiment of the present invention provides an automatic over-temperature and over-voltage protection device for a power adapter, the device includes:
the output judging module 10 is configured to collect an input voltage and an input current of a power adapter and rated operating powers of a plurality of operating devices connected to the power adapter, and obtain a standard output voltage of the power adapter by analyzing the input voltage, the input current and the rated operating powers;
the voltage comparison module 20 is configured to collect an actual output voltage of the power adapter in the first period of time in real time, compare the actual output voltage with the standard output voltage, send an overvoltage protection instruction when the actual output voltage is greater than the standard output voltage, and send a temperature detection instruction when the actual output voltage is less than or equal to the standard output voltage;
The temperature judging module 30 is configured to receive the temperature detecting instruction, detect, in real time, a real-time temperature of the power adapter and a real-time environment temperature where the power adapter is located in a second period of time, calculate a temperature correction coefficient according to the real-time environment temperature, correct the real-time temperature of the power adapter according to the temperature correction coefficient, and draw a temperature change chart according to the corrected temperature, and send an over-temperature protection instruction when the temperature change chart is different from a preset temperature change chart, where the duration of the first period of time is the same as that of the second period of time, the first period of time is set before the second period of time, and the first period of time is adjacent to the second period of time;
the protection module 40 is connected to the voltage comparison module 20 and the temperature judgment module 30, and is configured to receive the overvoltage protection instruction or the overtemperature protection instruction, and perform overvoltage or overtemperature protection on the power adapter.
Specifically, the embodiment of the invention obtains the standard output voltage of the power adapter by setting the analysis of the input voltage, the input current and the rated working power of the power adapter by the output judging module 10, provides an accurate data basis for the subsequent judgment of whether the power adapter is over-voltage or not, detects the actual output voltage of the power adapter in real time by setting the voltage comparing module 20, timely sends an over-voltage protection instruction when the actual output voltage exceeds the standard output voltage, avoids the damage of the power adapter due to over-voltage, protects the operation equipment connected with the power adapter from being damaged by the over-high voltage, sends a temperature detection instruction when the actual output voltage is smaller than or equal to the standard output voltage, and monitors the temperature condition of the power adapter in real time, the damage caused by the overhigh temperature of the power adapter is avoided, the real-time temperature and the environmental temperature of the power adapter are detected in real time through the temperature judging module 30, the temperature correction coefficient is calculated according to the real-time environmental temperature, the real-time temperature of the power adapter is corrected, thereby accurately reflecting the real temperature condition of the power adapter, avoiding erroneous judgment caused by the change of the environmental temperature, drawing a temperature change chart according to the corrected temperature, comparing with a preset temperature change chart, timely sending an overtemperature protection instruction when the temperature change chart and the temperature change chart are different, timely protecting the power adapter when the overtemperature condition occurs, avoiding the damage of the power adapter caused by overheat, receiving the overtemperature protection instruction or the overtemperature protection instruction through the protecting module 40, and carrying out overtemperature or overtemperature protection on the power adapter, therefore, the power adapter can be effectively protected, the service life of the power adapter is prolonged, and the safety of the power adapter in the use process is improved.
Referring to fig. 2, the output judging module 10 includes a data collecting unit 11 and a calculating unit 12, wherein,
the data acquisition unit 11 is used for acquiring the input voltage of the power adapter through a voltmeter and acquiring the input current of the power adapter through the ammeter;
the calculating unit 12 is connected with the data collecting unit, calculates output power of the power adapter by multiplying the input voltage and the input current of the power adapter, calculates output efficiency of the power adapter by dividing rated operating power of a plurality of operating devices by the output power of the power adapter, and calculates standard output voltage of the power adapter by the input voltage and the output efficiency of the power adapter.
In an implementation, the input voltage of the power adapter is 30V, the input current is 1A, and the rated operating power sum of the operating devices is 20W, and then the standard output voltage of the power adapter is 20V.
Specifically, the embodiment of the invention collects the input voltage of the power adapter through setting the data collection unit 11 to be connected with the input end of the power adapter through the voltmeter, collects the input current of the power adapter through connecting the voltmeter with the input end of the power adapter, accurately obtains the input voltage and the input current of the power adapter, provides accurate data for subsequent calculation, calculates the output power of the power adapter according to the input voltage and the input current through setting the calculation unit 12, then calculates the output efficiency of the power adapter according to the rated working power of the operation equipment, finally calculates the output voltage of the power adapter according to the input voltage and the output efficiency, accurately obtains the standard output voltage of the power adapter, provides accurate data base for subsequent comparison, and is convenient for subsequent comparison and judgment.
Referring to fig. 3, the voltage comparing module 20 includes a comparing unit 21 and an instruction transmitting unit 22, wherein,
the comparing unit 21 is configured to collect, in real time, an actual output voltage of the power adapter in a first period of time through a voltage sensor, and compare the actual output voltage with the standard output voltage to obtain a comparison result;
The command sending unit 22 is connected to the comparing unit 21, and is configured to send an overvoltage protection command when the actual output voltage is greater than the standard output voltage, and send a temperature detection command when the actual output voltage is less than or equal to the standard output voltage.
Specifically, in the embodiment of the invention, the comparison unit 21 is configured to monitor the actual output voltage of the power adapter in real time and compare the actual output voltage with the standard output voltage, so as to obtain a comparison result, so that the comparison result is accurate, and the instruction sending unit 22 is configured to send an overvoltage protection instruction to protect the safety of the voltage of the power adapter when the actual output voltage is greater than the standard output voltage, and send a temperature detection instruction to timely detect and process the temperature of the power adapter when the actual output voltage is less than or equal to the standard output voltage, so that the safety performance of the power adapter is effectively protected.
Specifically, the temperature judging module 30 includes an instruction receiving unit, a temperature collecting unit, an ambient temperature collecting unit, a calibrating unit, a drawing unit, a comparing unit and an over-temperature instruction transmitting unit, wherein,
The instruction receiving unit is used for receiving the temperature detection instruction;
the temperature acquisition unit is connected with the instruction receiving unit and used for detecting the temperature of the power adapter in real time in the second period through a temperature sensor to obtain a plurality of temperature values;
the environment temperature acquisition unit is used for detecting the environment temperature of the power adapter in real time in the second period through the temperature sensor to acquire a plurality of environment temperature values;
the calibration unit is connected with the temperature acquisition unit and the environment temperature acquisition unit, and is used for calculating the average value of a plurality of temperature values and the average value of a plurality of environment temperature values, calculating a temperature correction coefficient through the average value of the temperature values and the average value of the environment temperature values, and calibrating the plurality of temperature values according to the temperature correction coefficient to obtain a plurality of calibration temperature values;
the drawing unit is connected with the calibration unit, a rectangular coordinate system taking the temperature value as a vertical axis and the time as a horizontal axis is established, and a plurality of calibration temperature values and corresponding time are drawn in the rectangular coordinate system in a dot form to obtain the temperature change diagram;
The comparison unit is connected with the drawing unit, calculates the coincidence degree of a temperature change curve in the temperature change diagram and a temperature change curve in the preset temperature change diagram, and compares the coincidence degree calculation result with the preset coincidence degree;
and the over-temperature instruction sending unit is connected with the comparison unit and sends the over-temperature protection instruction when the contact ratio calculation result is smaller than the preset contact ratio.
Specifically, the embodiment of the invention improves the efficiency of the detection process by setting the instruction receiving unit to receive the temperature detection instruction, realizes the subsequent real-time detection of the temperature of the power adapter, and obtains a plurality of temperature values by setting the temperature acquisition unit to detect the temperature of the power adapter in real time in a second period through the temperature sensor, accurately obtains the real-time temperature of the power adapter, provides accurate data for subsequent temperature calibration and drawing, accurately obtains the real-time temperature of the environment where the power adapter is positioned by setting the environmental temperature acquisition unit to detect the environmental temperature of the power adapter in real time, provides accurate data for subsequent temperature calibration, calculates a temperature correction coefficient and a plurality of calibration temperature values by setting the calibration unit, eliminates the influence of the environmental temperature on the temperature of the power adapter, improves the accuracy of the temperature detection, ensures the basis of the subsequent processing data to be accurate, obtains a temperature change graph by setting the drawing unit, intuitively knows the temperature change condition of the power adapter, facilitates the subsequent comparison and judgment, sends out the coincidence of the temperature change graph in the temperature change graph and the preset temperature change graph to the expected temperature change graph, and the expected temperature change graph is in time, the coincidence of the power adapter is detected, the coincidence of the actual temperature change is detected, the coincidence of the temperature change is detected, the expected temperature change condition is detected, and the condition is detected when the power adapter is in the coincidence with the actual temperature change is detected, avoid the power adapter to appear trouble such as excessive temperature, prolong its life.
Specifically, the calibration unit comprises a mean value calculation subunit, a calibration coefficient calculation subunit and a calculation subunit, wherein
The average value calculation subunit is used for calculating the average value of a plurality of temperature values and the average value of a plurality of environment temperature values, and acquiring the average value of the temperature values and the average value of the environment temperature values;
the calibration coefficient calculating subunit is connected with the average value calculating subunit, and obtains the temperature correction coefficient through a formula k=t1/T2, wherein K is the temperature correction coefficient, T1 is the average value of the temperature values, and T2 is the average value of the environmental temperature values;
the calculating subunit is connected with the calibration coefficient calculating subunit, and a plurality of calibration temperature values are obtained by multiplying the temperature correction coefficient by a plurality of temperature values.
In practice, if the average value of the temperature values is: 24.6 degrees, the average value of the ambient temperature values is: 20.4 degrees, the temperature correction coefficient is 1.2.
Specifically, the embodiment of the invention obtains the average value of the temperature value and the average value of the ambient temperature value by setting the average value calculation subunit, avoids data errors caused by errors in the measurement process, improves the accuracy of the temperature value and the ambient temperature value by calculating the average value, obtains the temperature correction coefficient by setting the calibration coefficient calculation subunit, eliminates the influence of the ambient temperature on the temperature of the power adapter, ensures that the data of the subsequent calibration temperature value is accurate, provides accurate data support for drawing the subsequent temperature change graph by setting the calculation subunit, ensures that the temperature change graph is accurate, is beneficial to ensuring the normal work of the power adapter, avoids faults such as over temperature and the like, and prolongs the service life of the power adapter.
In particular, the protection module 40 comprises an instruction receiving unit, an overvoltage protection unit and an overtemperature protection unit, wherein,
the instruction receiving unit is used for receiving the overvoltage protection instruction and the overtemperature protection instruction;
the overvoltage protection unit is connected with the instruction receiving unit and is used for judging the overvoltage protection grade according to the actual output voltage when the instruction receiving unit receives the overvoltage protection instruction, and adopting corresponding overvoltage protection measures according to the grade;
the over-temperature protection unit is connected with the instruction receiving unit and is used for judging the over-temperature protection grade according to the calibrated temperature value when the instruction receiving unit receives the over-temperature protection instruction, and taking corresponding over-temperature protection measures according to the grade.
Specifically, the overvoltage protection unit comprises a grade judging subunit and an overvoltage protection subunit, wherein,
the grade judging subunit is used for calculating a voltage value difference value between the actual output voltage and the standard output voltage, and taking the voltage value difference value as a first-stage overvoltage protection when the voltage value difference value is larger than or equal to a preset voltage value difference value, and taking the voltage value difference value as a second-stage overvoltage protection when the voltage value difference value is smaller than the preset voltage value difference value;
The overvoltage protection subunit is connected with the grade judging subunit and is used for cutting off a power supply connected with the power adapter when the overvoltage protection grade is first-stage overvoltage protection, detecting and acquiring real-time working powers of a plurality of running devices connected with the power adapter in real time when the overvoltage protection grade is second-stage overvoltage protection, sequencing the real-time working powers according to the sizes of the running devices to acquire a power sequence, cutting off the running devices according to the power sequence, and stopping when the actual output voltage of the power adapter is smaller than or equal to the standard output voltage.
Specifically, the preset voltage value difference is 3V.
Specifically, the embodiment of the invention adopts different protection measures according to overvoltage conditions of different grades by setting the grade judging subunit, so that the efficiency of a protection process is improved, and by setting the overvoltage protecting subunit to adopt corresponding protection measures according to the overvoltage protection grade, when the overvoltage protection grade is the first-stage overvoltage protection, the power supply connected with the power supply adapter is cut off, the power supply adapter and the operation equipment connected with the power supply adapter are effectively prevented from being damaged due to overvoltage, when the overvoltage protection grade is the second-stage overvoltage protection, the real-time detection is carried out to obtain the real-time working power of a plurality of operation equipment connected with the power supply adapter, the real-time working power is sequenced according to the size, the power sequences are obtained, the operation equipment is cut off according to the power sequences, the actual output voltage of the power supply adapter is stopped when the actual output voltage is smaller than or equal to the standard output voltage, and part of the operation equipment is cut off in a targeted way according to the actual conditions, so that the number of the operation equipment damaged due to overvoltage is reduced, the normal operation of the power supply adapter is ensured, the service life of the power supply adapter and the operation equipment connected with the power adapter is prolonged, and the safety in the operation process of the power adapter is improved.
Specifically, the over-temperature protection unit comprises an over-temperature judgment subunit and an over-temperature protection subunit, wherein,
the over-temperature judging subunit is used for calculating a temperature value difference value between the calibration temperature value and a preset temperature value, and taking the temperature value difference value as a first-stage over-pressure protection when the temperature value difference value is larger than or equal to the preset temperature value difference value, and taking the temperature value difference value as a second-stage over-pressure protection when the temperature value difference value is smaller than the preset temperature value difference value;
the over-temperature protection subunit is connected with the over-temperature judgment subunit and is used for cutting off a power supply connected with the power adapter and a plurality of operation devices connected with the power adapter when the over-temperature protection grade is first-stage over-temperature protection, and starting a heat dissipation mechanism when the over-temperature protection grade is second-stage over-temperature protection so that the calibration temperature value is smaller than or equal to the preset temperature value.
Specifically, the preset temperature value difference is 5 degrees.
Specifically, the embodiment of the invention adopts different protection measures according to the over-temperature conditions of different grades by arranging the over-temperature judging subunit, so that the power adapter and the operation equipment are better protected, when the over-temperature protection grade is the first-grade over-temperature protection, the power supply connected with the power adapter and a plurality of operation equipment connected with the power adapter are cut off by arranging the over-temperature protecting subunit, the power adapter and the operation equipment connected with the power adapter are effectively prevented from being damaged due to overheat, and when the over-temperature protection grade is the second-grade over-temperature protection, the heat dissipation mechanism is started so that the calibrated temperature value is smaller than or equal to the preset temperature value, the temperature of the power adapter is reduced through the heat dissipation mechanism, the damage caused by overheat is avoided, the normal operation of the power adapter is ensured, the service lives of the power adapter and the connection equipment are prolonged, and the safety of the operation process of the power adapter is improved.
Specifically, the heat dissipation mechanism comprises a condensation pipe group installed on the surface of the power adapter, the condensation pipe group is composed of eight condensation pipes, when the overtemperature protection level is the second overtemperature protection level, the temperature value difference value is judged to reach the time period of the preset temperature value difference value, if the time period is more than or equal to the preset time period, all the condensation pipe groups are started, and if the time period is less than the preset time period, three quarters of the condensation pipe groups are started.
Specifically, the embodiment of the invention effectively dissipates heat when the power adapter is overheated by mounting the condensing tube group on the surface of the power adapter, avoids damage caused by overheating, prolongs the service life of the power adapter, judges how many condensing tube groups are started according to the time period when the temperature value difference reaches the preset temperature value difference, and more accurately controls the heat dissipation effect, thereby avoiding unnecessary energy waste.
Referring to fig. 4, an embodiment of the present invention further provides a method for an automatic over-temperature and over-voltage protection device of a power adapter, where the method includes:
step S100, acquiring input voltage and input current of a power adapter and rated working power of a plurality of operation devices connected with the power adapter, and acquiring standard output voltage of the power adapter by analyzing the input voltage, the input current and the rated working power;
Step S200, acquiring the actual output voltage of the power adapter in a first period of time in real time, comparing the actual output voltage with the standard output voltage, sending an overvoltage protection instruction when the actual output voltage is larger than the standard output voltage, and sending a temperature detection instruction when the actual output voltage is smaller than or equal to the standard output voltage;
step S300, receiving the temperature detection instruction, detecting the real-time temperature of the power adapter and the real-time environment temperature of the power adapter in a second period in real time, calculating a temperature correction coefficient according to the real-time environment temperature, correcting the real-time temperature of the power adapter according to the temperature correction coefficient, drawing a temperature change diagram according to the corrected temperature, and sending an over-temperature protection instruction when the temperature change diagram is different from a preset temperature change diagram;
step S400, receiving the overvoltage protection instruction or the overtemperature protection instruction, and performing overvoltage or overtemperature protection on the power adapter.
Specifically, the method for the automatic over-temperature and over-voltage protection device of the power adapter provided by the embodiment of the invention can execute the automatic over-temperature and over-voltage protection device of the power adapter, so that the same technical effects are realized, and the description is omitted here.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An automatic over-temperature and over-voltage protection device for a power adapter, comprising:
the output judging module is used for collecting input voltage and input current of the power adapter and rated working power of a plurality of operation devices connected with the power adapter, and obtaining standard output voltage of the power adapter by analyzing the input voltage, the input current and the rated working power;
The voltage comparison module is used for collecting the actual output voltage of the power adapter in the first period of time in real time, comparing the actual output voltage with the standard output voltage, sending an overvoltage protection instruction when the actual output voltage is larger than the standard output voltage, and sending a temperature detection instruction when the actual output voltage is smaller than or equal to the standard output voltage;
the temperature judging module is used for receiving the temperature detection instruction, detecting the real-time temperature of the power adapter and the real-time environment temperature of the power adapter in a second period in real time, calculating a temperature correction coefficient according to the real-time environment temperature, correcting the real-time temperature of the power adapter according to the temperature correction coefficient, drawing a temperature change diagram according to the corrected temperature, and sending an over-temperature protection instruction when the temperature change diagram is different from a preset temperature change diagram, wherein the duration of a first period is the same as that of the second period, the first period is arranged before the second period, and the first period is adjacent to the second period;
and the protection module is respectively connected with the voltage comparison module and the temperature judgment module and is used for receiving the overvoltage protection instruction or the over-temperature protection instruction and carrying out overvoltage or over-temperature protection on the power adapter.
2. The automatic over-temperature and over-voltage protection device of a power adapter according to claim 1, wherein the output judging module comprises a data acquisition unit and a calculation unit, wherein,
the data acquisition unit is used for acquiring the input voltage of the power adapter through the voltmeter and the input end of the power adapter, and acquiring the input current of the power adapter through the ammeter;
the calculating unit is connected with the data acquisition unit, calculates the output power of the power adapter by multiplying the input voltage and the input current of the power adapter, calculates the output efficiency of the power adapter by dividing the rated working power of a plurality of running devices by the output power of the power adapter, and calculates the standard output voltage of the power adapter by the input voltage and the output efficiency of the power adapter.
3. The automatic over-temperature and over-voltage protection device for a power adapter according to claim 2, wherein the voltage comparison module comprises a comparison unit and a command transmission unit, wherein,
The comparison unit is used for acquiring the actual output voltage of the power adapter in the first period in real time through the voltage sensor, and comparing the actual output voltage with the standard output voltage to acquire a comparison result;
the command sending unit is connected with the comparing unit and used for sending an overvoltage protection command when the actual output voltage is larger than the standard output voltage and sending a temperature detection command when the actual output voltage is smaller than or equal to the standard output voltage.
4. The automatic over-temperature and over-voltage protection device for a power adapter according to claim 3, wherein the temperature judgment module comprises an instruction receiving unit, a temperature acquisition unit, an ambient temperature acquisition unit, a calibration unit, a drawing unit, a comparison unit and an over-temperature instruction transmitting unit,
the instruction receiving unit is used for receiving the temperature detection instruction;
the temperature acquisition unit is connected with the instruction receiving unit and used for detecting the temperature of the power adapter in real time in the second period through a temperature sensor to obtain a plurality of temperature values;
the environment temperature acquisition unit is used for detecting the environment temperature of the power adapter in real time in the second period through the temperature sensor to acquire a plurality of environment temperature values;
The calibration unit is connected with the temperature acquisition unit and the environment temperature acquisition unit, and is used for calculating the average value of a plurality of temperature values and the average value of a plurality of environment temperature values, calculating a temperature correction coefficient through the average value of the temperature values and the average value of the environment temperature values, and calibrating the plurality of temperature values according to the temperature correction coefficient to obtain a plurality of calibration temperature values;
the drawing unit is connected with the calibration unit, a rectangular coordinate system taking the temperature value as a vertical axis and the time as a horizontal axis is established, and a plurality of calibration temperature values and corresponding time are drawn in the rectangular coordinate system in a dot form to obtain the temperature change diagram;
the comparison unit is connected with the drawing unit, calculates the coincidence degree of a temperature change curve in the temperature change diagram and a temperature change curve in the preset temperature change diagram, and compares the coincidence degree calculation result with the preset coincidence degree;
and the over-temperature instruction sending unit is connected with the comparison unit and sends the over-temperature protection instruction when the contact ratio calculation result is smaller than the preset contact ratio.
5. The automatic over-temperature and over-voltage protection device of a power adapter according to claim 4, wherein the calibration unit comprises a mean value calculation subunit, a calibration coefficient calculation subunit, and a calculation subunit, wherein
The average value calculation subunit is used for calculating the average value of a plurality of temperature values and the average value of a plurality of environment temperature values, and acquiring the average value of the temperature values and the average value of the environment temperature values;
the calibration coefficient calculating subunit is connected with the average value calculating subunit, and obtains the temperature correction coefficient through a formula k=t1/T2, wherein K is the temperature correction coefficient, T1 is the average value of the temperature values, and T2 is the average value of the environmental temperature values;
the calculating subunit is connected with the calibration coefficient calculating subunit, and a plurality of calibration temperature values are obtained by multiplying the temperature correction coefficient by a plurality of temperature values.
6. The automatic over-temperature and over-voltage protection device of a power adapter according to claim 5, wherein the protection module comprises a command receiving unit, an over-voltage protection unit, and an over-temperature protection unit, wherein,
the instruction receiving unit is used for receiving the overvoltage protection instruction and the overtemperature protection instruction;
the overvoltage protection unit is connected with the instruction receiving unit and is used for judging the overvoltage protection grade according to the actual output voltage when the instruction receiving unit receives the overvoltage protection instruction, and adopting corresponding overvoltage protection measures according to the grade;
The over-temperature protection unit is connected with the instruction receiving unit and is used for judging the over-temperature protection grade according to the calibrated temperature value when the instruction receiving unit receives the over-temperature protection instruction, and taking corresponding over-temperature protection measures according to the grade.
7. The automatic over-temperature and over-voltage protection device of a power adapter according to claim 6, wherein the over-voltage protection unit comprises a level judgment subunit and an over-voltage protection subunit, wherein,
the grade judging subunit is used for calculating a voltage value difference value between the actual output voltage and the standard output voltage, and taking the voltage value difference value as a first-stage overvoltage protection when the voltage value difference value is larger than or equal to a preset voltage value difference value, and taking the voltage value difference value as a second-stage overvoltage protection when the voltage value difference value is smaller than the preset voltage value difference value;
the overvoltage protection subunit is connected with the grade judging subunit and is used for cutting off a power supply connected with the power adapter when the overvoltage protection grade is first-stage overvoltage protection, detecting and acquiring real-time working powers of a plurality of running devices connected with the power adapter in real time when the overvoltage protection grade is second-stage overvoltage protection, sequencing the real-time working powers according to the sizes of the running devices to acquire a power sequence, cutting off the running devices according to the power sequence, and stopping when the actual output voltage of the power adapter is smaller than or equal to the standard output voltage.
8. The automatic over-temperature and over-voltage protection device of a power adapter according to claim 7, wherein the over-temperature protection unit comprises an over-temperature judgment subunit and an over-temperature protection subunit, wherein,
the over-temperature judging subunit is used for calculating a temperature value difference value between the calibration temperature value and a preset temperature value, and taking the temperature value difference value as a first-stage over-pressure protection when the temperature value difference value is larger than or equal to the preset temperature value difference value, and taking the temperature value difference value as a second-stage over-pressure protection when the temperature value difference value is smaller than the preset temperature value difference value;
the over-temperature protection subunit is connected with the over-temperature judgment subunit and is used for cutting off a power supply connected with the power adapter and a plurality of operation devices connected with the power adapter when the over-temperature protection grade is first-stage over-temperature protection, and starting a heat dissipation mechanism when the over-temperature protection grade is second-stage over-temperature protection so that the calibration temperature value is smaller than or equal to the preset temperature value.
9. The automatic over-temperature and over-pressure protection device of a power adapter according to claim 8, wherein the heat dissipation mechanism comprises a condensing tube group installed on the surface of the power adapter, the condensing tube group is composed of eight condensing tubes, when the over-temperature protection level is a second-level over-temperature protection, a period of time when the temperature value difference reaches the preset temperature value difference is judged, if the period of time is greater than or equal to a preset period of time, all the condensing tube groups are started, and if the period of time is less than the preset period of time, three-fourths of the condensing tube groups are started.
10. A method of using the automatic over-temperature and over-voltage protection device of the power adapter of any one of claims 1-9, comprising:
collecting input voltage and input current of a power adapter and rated working power of a plurality of operation devices connected with the power adapter, and obtaining standard output voltage of the power adapter by analyzing the input voltage, the input current and the rated working power;
acquiring the actual output voltage of the power adapter in a first period of time in real time, comparing the actual output voltage with the standard output voltage, sending an overvoltage protection instruction when the actual output voltage is larger than the standard output voltage, and sending a temperature detection instruction when the actual output voltage is smaller than or equal to the standard output voltage;
receiving the temperature detection instruction, detecting the real-time temperature of the power adapter and the real-time environment temperature of the power adapter in a second period in real time, calculating a temperature correction coefficient according to the real-time environment temperature, correcting the real-time temperature of the power adapter according to the temperature correction coefficient, drawing a temperature change diagram according to the corrected temperature, and sending an over-temperature protection instruction when the temperature change diagram is different from a preset temperature change diagram
And receiving the overvoltage protection instruction or the over-temperature protection instruction, and performing overvoltage or over-temperature protection on the power adapter.
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