CN117233664B - Open circuit detection method and system for micro-current circuit - Google Patents
Open circuit detection method and system for micro-current circuit Download PDFInfo
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Abstract
The application provides an open circuit detection method and system for a micro-current circuit, and relates to the technical field of open circuit detection of electronic components, wherein the method comprises the following steps: step S1: setting a rated power proportion factor, an upper limit power factor and a learning factor, and initializing long-term actual power and an open circuit power threshold value to be 0; step S2: acquiring rated power, rated working voltage, actual working current, open-circuit power ratio and circuit power factor of a circuit; step S3: calculating an actual power and an open circuit power threshold under the current load, and step S4: if the actual power is smaller than the beta-times rated power, entering step S5; step S5: the actual power is smaller than the open circuit power threshold under the current load, and the open circuit is judged; and (2) judging that the actual power is larger than the open circuit power threshold under the current load, and updating the long-term current power and returning to the step (S2). The method can be well applied to detection of the open circuit state of the micro current, and has good accuracy.
Description
Technical Field
The application relates to the technical field of electronic component open circuit detection, in particular to an open circuit detection method and system for a micro-current circuit.
Background
Currently, in the design scheme of embedded circuit system, the open circuit state detection of a certain circuit is generally performed by calculating the power value of the circuit and comparing the power value with a fixed preset power threshold value, so as to determine whether an open circuit fault occurs.
However, this method of detecting the open state of a circuit (especially a minute current circuit) by presetting a power threshold value is insufficient to satisfy the current demand. The reason is that, due to various factors, firstly, with the gradual development of electronic components and electronic technologies, on the basis of achieving the same effect, the working power of part of electronic components is obviously reduced, and meanwhile, the circuit power change caused by the open circuit of the electronic components is also obviously reduced. Secondly, most of electronic components are normally distributed with the power parameter being the average value of rated power during production and manufacture, that is, the rated power of different electronic components in the same electronic component may be different to some extent. Thirdly, with the continuous use of related electronic components, the aging phenomenon of the electronic components caused by the change of the load can occur, and the power parameters of the electronic components can also be dynamically changed.
Due to the influence of the factors, the method for detecting the open circuit by the fixed preset power threshold adopted in the related technology has the problem of low detection accuracy and is difficult to be applied to the problem of dynamic power change of electronic components.
Disclosure of Invention
In order to solve the problems in the related art, the present application provides an open circuit detection method and system for a minute current circuit. The method can be well applied to detection of the open circuit state of the micro current, and has good accuracy; meanwhile, the method can be also suitable for open circuit detection requirements of dynamic change of power parameters of electronic components in the use process.
In order to achieve the above purpose, the technical scheme adopted in the application includes:
according to a first aspect of the present application, there is provided an open circuit detection method for a minute current circuit, comprising the steps of:
step S1: setting rated power scale factorInitializing long-term actual power +.>And initializing an open circuit power threshold +.>Respectively 0;
step S2: obtaining rated power of circuitRated operating voltage->Actual operating voltage->Actual operating current->Open circuit power ratio->And circuit power factor->；
Step S3: calculating actual powerAnd an open circuit power threshold under the current load +.>Wherein, the method comprises the steps of, wherein,
；/>；
in the method, in the process of the invention,，/>and->；/>And->，/>The power of the electric element to be detected on the circuit is used for detecting the power of the electric element to be detected on the circuit; />，/>And->And μ satisfies the inequality: />;
Step S4: excess power judgment: if the actual power isRated power less than beta times +>Step S5 is entered;
step S5: open circuit judgment: if the actual power isLess than the current negativeDownload open circuit power threshold->Judging as an open circuit; if the actual power +>Greater than the open circuit power threshold under the current load +.>Judging that the power is not open, updating the long-term current power and returning to the step S2, wherein the long-term current power is updated to +.>。
Optionally, in the step S4, if the actual power isRated power greater than beta times +>Then the excess processing is entered.
Optionally, the excess processing includes any one or more of the following:
shut down circuit output, shut down circuit input, and system power down.
Optionally, the upper power factor β=2.
According to a second aspect of the present application, there is provided an open circuit detection system for a micro-current circuit, which is applied to the open circuit detection method for a micro-current circuit according to any one of the first aspects of the present application, the system including:
an input module for setting rated power scale factorInitializing long-term actual power +.>And initializing an open circuit power threshold +.>Respectively 0;
an acquisition module for acquiring rated power of the circuitRated operating voltage->Actual operating voltage->Actual operating current->Open circuit power ratio->And circuit power factor->；
A calculation module for calculating the actual powerAnd an open circuit power threshold under the current load +.>；
And the processing module is used for performing excess power judgment and open circuit judgment.
According to a third aspect of the present application, there is provided a computer readable storage medium having instructions stored therein, which when run on a terminal, cause the terminal to perform the open circuit detection method for a micro current circuit according to any one of the first aspects of the present application.
According to a fourth aspect of the present application, there is provided an open circuit detection device for an in-vehicle electronic component, including the open circuit detection system for a minute current circuit described in the third aspect of the present application.
According to a fifth aspect of the present application, there is also provided a vehicle including an in-vehicle electronic component and an open circuit detection device for an in-vehicle electronic component according to the fourth aspect of the present application.
Optionally, the vehicle-mounted electronic component is a turn signal lamp.
The beneficial effects are that:
1. through the above technical solution, in one aspect, the method of the present application is to sample the actual working current of the present time of the circuit to be detectedAnd the actual operating voltage>Calculating rated power of the circuit under the current load, and using the rated power as an open circuit power threshold value +.>Compared with the technical scheme of detecting the open circuit of a circuit through a fixed preset power threshold value in the prior art, the threshold value of the open circuit judgment threshold value calibration method is more attached to an actual circuit, and is beneficial to effectively improving the accuracy and precision of open circuit detection. On the other hand, the method of the application aims at the fluctuation of the circuit to be detected, adopts an iterative learning method to dynamically calibrate the open circuit power threshold value, is favorable for accurately detecting whether the circuit is in an open circuit state or not in a micro-current circuit environment, and can effectively improve the accuracy and precision of open circuit detection. On the other hand, the method has the characteristics of relatively fewer iteration times, small required calculation space and flexible configuration, can be suitable for various circuit environments, and can be widely suitable for software and hardware development designs of various embedded circuit systems.
2. Other benefits or advantages of the present application will be described in more detail in the detailed description.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art. Wherein:
fig. 1 is a schematic flow chart of steps of an open circuit detection method for a micro-current circuit according to an exemplary embodiment of the present application;
FIG. 2 is a schematic diagram of the calculation of the open circuit power threshold of the present application;
fig. 3 is a simulation result of actual power, an open circuit power threshold, and long-term actual power in an iterative process of an open circuit detection method for a micro-current circuit provided in an exemplary embodiment of the present application.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments.
Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Furthermore, in the embodiments herein, the words "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
In order to facilitate the technical solution of the present application to be more clearly and accurately understood by the relevant skilled person, the following description of the related art will be given in detail.
In the detection work, since the power of the circuit cannot be directly measured, the measurement of the power of the circuit is generally indirectly realized by adopting a mode of detecting the current and the voltage of the circuit. Meanwhile, in the related art, the principle of judging whether the circuit has an open circuit or not by using a fixed preset power threshold value is as follows: and comparing the indirectly measured actual power of the circuit with a preset power threshold value, and judging that the circuit is open if the measured actual power of the circuit is smaller than the preset power threshold value under the rated power.
However, such an open circuit detection method is insufficient to meet the current detection needs. Taking a turn signal in the field of vehicle engineering as an example, a more detailed analysis is made below of why it is insufficient to meet the current detection needs. Firstly, with the gradual development of automotive electronics, the existing turn signal lamp load is gradually updated from an original halogen lamp to an LED lamp (this is because the LED lamp not only has lower energy consumption, but also has better brightness, and also has a larger selectable color temperature range), and the LED lamp has smaller working power, so that the power change brought by the open circuit of a related circuit is reduced accordingly, for example, an exemplary LED lamp may have current fluctuation brought by the open circuit of less than 100mA, the difference between the open circuit and the closed circuit power of less than 3%, and even less than the current fluctuation brought by the circuit due to different working states of the main control chip (corresponding, power change is brought to the circuit), so that the open circuit detection method based on a fixed preset power threshold is difficult to realize high-precision open circuit state detection of the existing embedded circuit system, and may even cause erroneous judgment. Secondly, when the LED lamp load is produced and manufactured, the power parameters of the LED lamp load generally show normal distribution taking rated power as a mean value, and certain consistency errors exist, so that the open circuit detection method based on the fixed preset power threshold is difficult to accurately detect the open-circuit and closed-circuit states of the LED lamp load. Thirdly, along with the gradual use of the LED lamp, the LED lamp is aged, the power of the LED lamp is also dynamically changed, and therefore, an open circuit detection method based on a fixed preset power threshold value is difficult to be suitable for the aged LED lamp.
The following describes the technical scheme of the present application in detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1, according to a first aspect of the present application, the present embodiment provides an open circuit detection method for a micro-current circuit, including the steps of:
step S1: setting rated power scale factorInitializing long-term actual power +.>And initializing an open circuit power threshold +.>Respectively 0;
step S2: obtaining rated power of circuitRated operating voltage->Actual operating voltage->Actual operating current->Open circuit power ratio->And circuit power factor->；
Step S3: calculating actual powerAnd an open circuit power threshold under the current load +.>Wherein->；；
In the method, in the process of the invention,，/>and->；/>And->，/>The power of the electric element to be detected on the circuit is used for detecting the power of the electric element to be detected on the circuit; />，/>And->And μ satisfies the inequality: />;
Step S4: excess power judgment: if the actual power isRated less than beta timesPower->Step S5 is entered;
step S5: open circuit judgment: if the actual power isLess than the threshold value of the open circuit power under the current load +.>Judging as an open circuit; if the actual power +>Greater than the open circuit power threshold under the current load +.>Judging that the power is not open, updating the long-term current power and returning to the step S2, wherein the long-term current power is updated to +.>。
In order to facilitate the relative technicians to understand the technical solutions of the present application more accurately and clearly, the following describes the derivation process of some formulas in the technical solutions of the present application.
First, assume that the power rating of the circuit isThe power of a certain electronic component is +.>After the electronic component is opened, the rated power of the circuit is +.>. Since in engineering practice the current and voltage of the circuit are in a fluctuating state, the actual power is generally not detected +.>Less than rated power->Immediately outputting an open alarm when detecting the actual power +.>Less than->An open alarm is output. This is because, when there may be a large load or the like, even if the electronic component has been opened, the power of the circuit at this time is not immediately lower than +.>. Therefore, it is necessary to set a ratioThe larger power threshold is taken as a judgment basis, and meanwhile, the fact that the actual load of the circuit is continuously changed in the use process is considered, so that a fixed power threshold cannot be set as the judgment basis. Thus, the present application adopts a completely new parameter, open-circuit power ratio +.>I.e. actual power +.>Occupy rated power->When the actual power is +>The ratio to the rated power is smaller than the open circuit power ratio +.>When it is judged to be in an open state.
I.e. whenWhen there is an open circuit in the circuitThis formula is equivalent to: />The method comprises the steps of carrying out a first treatment on the surface of the Wherein, will->Marked as->I.e. the open power threshold of the circuit. Referring to FIG. 2, in the present application, the rated power scale factor is recorded as +.>The value range isAt this time, for the open circuit power ratio +.>The method comprises the following steps: />=/>(see FIG. 2).
Recording deviceIs->Correspondingly, the open-circuit power threshold of the circuit +.>The power factor of the circuit is +.>，/>Let the current time be t, then rated power be +.>From ohm's law, there is +.>Rated power under actual loadActual power->Wherein->、/>The current and the voltage of the circuit at the current time t are respectively, and the current load is the threshold value of the open circuit powerWherein->For a long-term current power,，/>is a learning factor;
assume that，/>That is, if the current voltage is not considered to fluctuate due to factors other than the open circuit, there is,
since 0 < ")In the case of a composition of less than 1, when t- >, infinity time:
=/>if an open circuit is to be detected at all times, it is necessary +.>The constant holds that:
i.e. when，/>Satisfy->With this inequality, the open circuit can always be detected.
Taking an exemplary implementation as an example, assuming that three bulbs of a certain circuit are connected in parallel, the rated power of the three bulbs is 1W,22W and 23W respectively, the rated voltage of the circuit is 24V, if the bulb of 1W is open, the current fluctuation caused is small (the corresponding power change is 1/45, and the open state is difficult to accurately detect in the existing fixed power threshold setting mode);
by the method of the application, the detection process can be as follows: setting up，/>Obviously meet the above requirementsThe inequality, at this time, < >>Actual current in the circuit +.>A,，/>When initialized to 0, the circuit starts to iterate after Power-up, and the simulation result can be seen in fig. 3 (step represents the number of iteration steps and Power represents the Power in fig. 3). As can be seen from fig. 3, the open circuit can be detected by iterating to around 800 steps.
Thus, by the above technical solution, in one aspect, the method of the present application is implemented by sampling the actual operating current of the current time of the circuit to be detectedAnd the actual operating voltage>Calculating rated power of the circuit under the current load, and using the rated power as an open circuit power threshold value +.>Compared with the technical scheme of detecting the open circuit of a circuit through a fixed preset power threshold value in the prior art, the threshold value of the open circuit judgment threshold value calibration method is more attached to an actual circuit, and is beneficial to effectively improving the accuracy and precision of open circuit detection. On the other hand, the method of the application aims at the fluctuation of the circuit to be detected, adopts an iterative learning method to dynamically calibrate the open circuit power threshold value, is favorable for accurately detecting whether the circuit is in an open circuit state or not in a micro-current circuit environment, and can effectively improve the accuracy and precision of open circuit detection. On the other hand, the method of the present application has relatively low iteration number and requires calculationThe circuit has the characteristics of small space and flexible configuration, can be suitable for various circuit environments, and can be widely suitable for software and hardware development designs of various embedded circuit systems.
In one embodiment of the present application, as shown in fig. 1, in step S4 of the present application, if the actual power isRated power greater than beta times +>Then the excess processing is entered. That is, when the current actual power is detected to be beta times the rated power, the circuit is in an excess error state at the moment, and whether the circuit is open or not is not detected.
In one embodiment of the present application, the excess processing of the present application may include any one or more of the following: shut down circuit output, shut down circuit input, and system power down. Therefore, the excess processing modes can effectively solve the problem of excess circuit, so that the safety of the circuit and related electronic components can be effectively ensured.
In a specific embodiment of the present application, the upper power factor β=2. When the current actual power is 2 times of the rated power, the circuit is in an excess error state, whether an open circuit is detected or not is not needed, and excess processing is needed to ensure the safety of the circuit and related electronic components.
According to a second aspect of the present application, there is provided an open circuit detection system (not shown) for a micro-current circuit, applied to the open circuit detection method for a micro-current circuit of any one of the first aspects of the present application, the system comprising:
an input module for setting rated power scale factorInitializing long-term actual power +.>And initializing an open circuit power threshold +.>Respectively 0;
an acquisition module for acquiring rated power of the circuitRated operating voltage->Actual operating voltage->Actual operating current->Open circuit power ratio->And circuit power factor->；
A calculation module for calculating the actual powerAnd an open circuit power threshold under the current load +.>；
And the processing module is used for performing excess power judgment and open circuit judgment.
Therefore, the open circuit detection system for the micro-current circuit can be effectively adapted to the circuit with dynamic change of actual power on the basis of effectively improving the accuracy and precision of open circuit detection of the related micro-current circuit. In addition, the open circuit detection system for the micro-current circuit has the characteristics of less iteration times, small required calculation space and flexible configuration, and can be widely applied to the development and design of software and hardware of various embedded circuit systems.
It may be appreciated that the embodiment of the present application may divide the functional module or the functional unit of the open circuit detection system for the micro current circuit according to the above method example, for example, each functional module or functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated modules may be implemented in hardware, or in software functional modules or functional units. The division of the modules or units in the embodiments of the present application is merely a logic function division, and other division manners may be implemented in practice.
According to a third aspect of the present application, there is provided a computer readable storage medium (not shown) having instructions stored therein, which when run on a terminal, cause the terminal to perform the open circuit detection method for a micro current circuit as in any of the first aspects of the present application.
The computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access Memory (Random Access Memory, RAM), a Read-Only Memory (ROM), an erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), a register, a hard disk, an optical fiber, a portable compact disc Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing, or any other form of computer readable storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an application specific integrated circuit (ApplicationSpecific Integrated Circuit, ASIC). In the context of the present application, a computer-readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
According to a fourth aspect of the present application, there is provided an open circuit detection device (not shown) for an in-vehicle electronic component, including the open circuit detection system for a minute current circuit in the third aspect of the present application.
It is understood that the open circuit detection device for an in-vehicle electronic component of the present application may be used for open circuit state detection of an in-vehicle electronic component, for example, an in-vehicle atmosphere lamp, an in-vehicle indicator lamp, an in-vehicle fan, a turn signal lamp, and the like, which is not particularly limited in this application.
According to a fifth aspect of the present application, there is also provided a vehicle (not shown) including the in-vehicle electronic component and the open circuit detection device for the in-vehicle electronic component according to the fourth aspect of the present application.
Thus, by the vehicle of the present application, the open state of the in-vehicle electronic component can be effectively detected by the open detection device for the in-vehicle electronic component.
It is to be understood that the vehicles of the present application include, but are not limited to, electric vehicles, hybrid vehicles, fuel cell vehicles, fuel oil vehicles, hydrogen engine vehicles, gas vehicles, extended range electric vehicles, solar vehicles, etc., as the present application is not specifically limited thereto.
In one embodiment of the present application, the vehicle-mounted electronic component may be a turn signal.
In the several embodiments provided herein, it should be understood that the disclosed systems, modules, and methods may be implemented in other manners. For example, the system embodiments described above are merely illustrative, e.g., the division of the elements is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, indirect coupling or communication connection of devices or units, electrical, mechanical, or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (9)
1. An open circuit detection method for a micro-current circuit, comprising the steps of:
step S1: setting rated power scale factorUpper power factor beta and learning factor->Initializing long-term actual powerAnd initializing an open circuit power threshold +.>Respectively 0;
step S2: obtaining rated power of circuitRated operating voltage->Actual operating voltage->Actual operating current->Open circuit power ratio->And circuit power factor->；
Step S3: calculating actual powerAnd an open circuit power threshold under the current load +.>Wherein, the method comprises the steps of, wherein,
；/>；
in the method, in the process of the invention,，/>and->；/>And->，/>The power of the electric element to be detected on the circuit is used for detecting the power of the electric element to be detected on the circuit; />，/>And->And μ satisfies the inequality: />;
Step S4: excess power judgment: if the actual power isRated power less than beta times +>Step S5 is entered;
step S5: open circuit judgment: if the actual power isLess than the threshold value of the open circuit power under the current load +.>Judging as an open circuit; if the actual power +>Greater than the open circuit power threshold under the current load +.>Judging that the power is not open, updating the long-term current power and returning to the step S2, wherein the long-term current power is updated to +.>。
2. The method for detecting an open circuit of a micro-current circuit according to claim 1, wherein in the step S4, if the actual power isRated power greater than beta times +>Then the excess processing is entered.
3. The open circuit detection method for a micro-current circuit according to claim 2, wherein the excess processing includes any one or more of the following:
closing circuit output, closing circuit input and system power-off.
4. An open circuit detection method for a micro-current circuit according to any one of claims 1-3, characterized in that the upper power factor β = 2.
5. An open circuit detection system for a minute current circuit, characterized by being applied to the open circuit detection method for a minute current circuit according to any of claims 1 to 4, the system comprising:
an input module for setting rated power scale factorInitializing long-term actual power +.>And initializing an open circuit power threshold +.>Respectively 0;
an acquisition module for acquiring rated power of the circuitRated operating voltage->Actual operating voltage->Actual operating current->Open circuit power ratio->And circuit power factor->；
A calculation module for calculating the actual powerAnd an open circuit power threshold under the current load +.>；
And the processing module is used for performing excess power judgment and open circuit judgment.
6. A computer readable storage medium, characterized in that instructions are stored in the computer readable storage medium, which instructions, when run on a terminal, cause the terminal to perform the open circuit detection method for a micro current circuit according to any one of claims 1-4.
7. An open circuit detection device for an in-vehicle electronic component, comprising the open circuit detection system for a minute-current circuit according to claim 5.
8. A vehicle characterized by comprising an in-vehicle electronic component and the open circuit detection device for an in-vehicle electronic component according to claim 7.
9. The vehicle of claim 8, wherein the onboard electronic component is a turn signal.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0129280D0 (en) * | 2000-12-08 | 2002-01-23 | Yazaki Corp | Vehicle battery's open circuit voltage estimating method and a system therefor |
| WO2013163266A1 (en) * | 2012-04-24 | 2013-10-31 | General Electric Company | Power conversion system with open- circuit fault detection and method thereof |
| CN107797047A (en) * | 2017-09-27 | 2018-03-13 | 深圳和而泰智能控制股份有限公司 | Load state detecting method, device and electronic equipment |
| WO2021000669A1 (en) * | 2019-06-29 | 2021-01-07 | 华为技术有限公司 | Charging pile system management method and charging pile system |
| CN113933752A (en) * | 2021-09-09 | 2022-01-14 | 华中科技大学 | IGBT open-circuit fault detection method and device for cascaded H-bridge converter |
| CN114035016A (en) * | 2021-11-23 | 2022-02-11 | 河北博威集成电路有限公司 | Power device transmission parameter determination method, device, terminal and storage medium |
| CN114814572A (en) * | 2022-04-07 | 2022-07-29 | 成都创科升电子科技有限责任公司 | Door and window locked-rotation detection method |
| CN114814530A (en) * | 2022-04-01 | 2022-07-29 | 合肥仙湖半导体科技有限公司 | Load open circuit detection circuit and method for high-side intelligent power IC and application |
| CN115642644A (en) * | 2022-10-31 | 2023-01-24 | 博阳能源科技有限公司 | MPPT control method |
| CN116073331A (en) * | 2022-12-09 | 2023-05-05 | 航霈科技(深圳)有限公司 | Protection current set value alarming method, device, computing equipment and storage medium |
| WO2023116385A1 (en) * | 2021-12-22 | 2023-06-29 | 深圳市正浩创新科技股份有限公司 | Power supply device identification method, electronic device and storage medium |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005121433A (en) * | 2003-10-15 | 2005-05-12 | Anden | Circuit for detecting disconnection |
| JP4211715B2 (en) * | 2004-08-23 | 2009-01-21 | 株式会社デンソー | In-vehicle power supply system |
| TW201224485A (en) * | 2010-12-02 | 2012-06-16 | Ind Tech Res Inst | State-of-charge estimation method and battery control unit |
-
2023
- 2023-11-13 CN CN202311503427.9A patent/CN117233664B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0129280D0 (en) * | 2000-12-08 | 2002-01-23 | Yazaki Corp | Vehicle battery's open circuit voltage estimating method and a system therefor |
| WO2013163266A1 (en) * | 2012-04-24 | 2013-10-31 | General Electric Company | Power conversion system with open- circuit fault detection and method thereof |
| CN107797047A (en) * | 2017-09-27 | 2018-03-13 | 深圳和而泰智能控制股份有限公司 | Load state detecting method, device and electronic equipment |
| WO2021000669A1 (en) * | 2019-06-29 | 2021-01-07 | 华为技术有限公司 | Charging pile system management method and charging pile system |
| CN113933752A (en) * | 2021-09-09 | 2022-01-14 | 华中科技大学 | IGBT open-circuit fault detection method and device for cascaded H-bridge converter |
| CN114035016A (en) * | 2021-11-23 | 2022-02-11 | 河北博威集成电路有限公司 | Power device transmission parameter determination method, device, terminal and storage medium |
| WO2023116385A1 (en) * | 2021-12-22 | 2023-06-29 | 深圳市正浩创新科技股份有限公司 | Power supply device identification method, electronic device and storage medium |
| CN114814530A (en) * | 2022-04-01 | 2022-07-29 | 合肥仙湖半导体科技有限公司 | Load open circuit detection circuit and method for high-side intelligent power IC and application |
| CN114814572A (en) * | 2022-04-07 | 2022-07-29 | 成都创科升电子科技有限责任公司 | Door and window locked-rotation detection method |
| CN115642644A (en) * | 2022-10-31 | 2023-01-24 | 博阳能源科技有限公司 | MPPT control method |
| CN116073331A (en) * | 2022-12-09 | 2023-05-05 | 航霈科技(深圳)有限公司 | Protection current set value alarming method, device, computing equipment and storage medium |
Non-Patent Citations (2)
| Title |
|---|
| Open-Circuit Fault in EHV/UHV Transmission System and New Zero Sequence Over-current Protection Scheme;Yadong Liu;《2018 International Conference on Power System Technology》;全文 * |
| 一种大功率金卤灯电子镇流器的分析与设计;李俊杰;《中国照明电器》;7-11 * |
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