CN111025007A - Power supply voltage detection method and device and storage medium - Google Patents
Power supply voltage detection method and device and storage medium Download PDFInfo
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- CN111025007A CN111025007A CN201911346278.3A CN201911346278A CN111025007A CN 111025007 A CN111025007 A CN 111025007A CN 201911346278 A CN201911346278 A CN 201911346278A CN 111025007 A CN111025007 A CN 111025007A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2503—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques for measuring voltage only, e.g. digital volt meters (DVM's)
Abstract
The application relates to a method, a device and a storage medium for detecting a power supply voltage, belonging to the technical field of electronics, wherein the method comprises the following steps: acquiring the working period of the motor; determining voltage detection time based on the difference between the working voltage of the power supply at each working time in the working period and the target voltage; detecting a voltage value of the power supply at the voltage detection moment to determine the power supply voltage of the power supply; the problem that the detected power supply voltage is low in precision due to the fact that the power supply voltage of the power supply is periodically pulled down when a switching tube in the driving circuit is periodically switched on and off when the motor runs can be solved; because the processing assembly can control the voltage detection assembly to collect the working voltage of the power supply at the appointed moment, the working voltage which accords with the target voltage can be determined by combining the difference value between the working voltage corresponding to the appointed moment and the target voltage, and the voltage detection precision is improved.
Description
Technical Field
The application relates to a power supply voltage detection method, a power supply voltage detection device and a storage medium, and belongs to the technical field of electronics.
Background
The constant temperature and voltage protection control of the hair dryer requires accurate acquisition of the magnitude of the power supply voltage output by the power supply. In the traditional voltage detection method, after input alternating current is rectified, direct current bus voltage is subjected to voltage division and is sampled by an ADC (analog to digital converter) to reversely deduce accurate alternating current bus voltage.
However, the motor (for example, a brushless dc motor) used by the hair dryer also takes power from the dc bus, and the control mode of the motor may cause interference to the bus voltage, thereby affecting the accuracy of detecting the power supply voltage of the power supply, and thus the constant temperature and voltage protection control of the hair dryer is not accurate any more.
Disclosure of Invention
The application provides a power supply voltage detection method, a power supply voltage detection device and a storage medium, which can solve the problem that when a motor runs, a switching tube in a driving circuit is periodically switched on and off, the power supply voltage of a power supply source is periodically lowered, and the detected power supply voltage is low in precision. The application provides the following technical scheme:
in a first aspect, a supply voltage detection method is provided, where the method includes:
acquiring the working period of the motor;
determining a voltage detection time based on a difference value between a working voltage of a power supply at each working time in the working period and a target voltage, wherein the target voltage is a power supply voltage when the motor is not started when the power supply is used for supplying power to the motor;
and detecting the voltage value of the power supply at the voltage detection moment so as to determine the power supply voltage of the power supply.
Optionally, the determining the voltage detection time based on a difference between the operating voltage of the power supply at each operating time in the operating cycle and the target voltage includes:
and determining a first working moment in the working period when the working voltage is the same as the target voltage, and determining the first working moment as the voltage detection moment.
Optionally, the voltage value detected at the voltage detection time is a power supply voltage of the power supply.
Optionally, the determining the working time when the working voltage is the same as the target voltage in the working cycle, where the control signal of the motor is a square wave signal, includes:
determining the starting time of the working period as the working time; alternatively, the first and second electrodes may be,
and determining the end time of the working period as the working time.
Optionally, the determining the voltage detection time based on a difference between the operating voltage of the power supply at each operating time in the operating cycle and the target voltage includes:
acquiring working voltage of each working moment in the working period;
performing curve fitting on the change condition of the working voltage to obtain a working voltage curve;
and determining a second working moment corresponding to the difference value between the maximum voltage value and a preset value in the working voltage curve as the voltage detection moment.
Optionally, the detecting a voltage value of the power supply at the voltage detection time to determine a power supply voltage of the power supply includes:
detecting a voltage value of the power supply at the voltage detection time;
and determining the sum of the voltage value and the preset value as the power supply voltage of the power supply.
Optionally, the acquiring the duty cycle of the motor includes:
acquiring a control signal of the motor, and determining the period of the control signal as the working period;
alternatively, the first and second electrodes may be,
and acquiring the on-off period of a switch tube in a driving circuit for controlling the motor, and determining the on-off period as the working period.
In a second aspect, a supply voltage detection apparatus is provided, the apparatus comprising:
the period acquisition module is used for acquiring the working period of the motor;
the time determining module is used for determining the voltage detection time based on the difference value between the working voltage of each working time power supply in the working period and a target voltage, wherein the target voltage is the power supply voltage when the motor is not started when the power supply is used for supplying power to the motor;
and the voltage detection module is used for detecting the voltage value of the power supply at the voltage detection moment so as to determine the power supply voltage of the power supply.
In a third aspect, a supply voltage detection apparatus is provided, the apparatus comprising a processor and a memory; the memory stores therein a program that is loaded and executed by the processor to implement the supply voltage detection method of the first aspect.
In a fourth aspect, a computer-readable storage medium is provided, in which a program is stored, the program being loaded and executed by the processor to implement the supply voltage detection method of the first aspect.
The beneficial effect of this application lies in: acquiring the working period of the motor; determining voltage detection time based on the difference between the working voltage of the power supply at each working time in the working period and the target voltage; detecting a voltage value of the power supply at the voltage detection moment to determine the power supply voltage of the power supply; the problem that the detected power supply voltage is low in precision due to the fact that the power supply voltage of the power supply is periodically pulled down when a switching tube in the driving circuit is periodically switched on and off when the motor runs can be solved; because the processing assembly can control the voltage detection assembly to collect the working voltage of the power supply at the appointed moment, the working voltage which accords with the target voltage can be determined by combining the difference value between the working voltage corresponding to the appointed moment and the target voltage, and the voltage detection precision is improved.
The foregoing description is only an overview of the technical solutions of the present application, and in order to make the technical solutions of the present application more clear and clear, and to implement the technical solutions according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present application and the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of a supply voltage detection system according to an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating a variation curve of an operating voltage of a power supply during operation of a motor according to an embodiment of the present disclosure;
FIG. 3 is a flow chart of a supply voltage detection method provided by an embodiment of the present application;
fig. 4 is a block diagram of a supply voltage detection apparatus according to an embodiment of the present application;
fig. 5 is a block diagram of a supply voltage detection apparatus according to an embodiment of the present application.
Detailed Description
The following detailed description of embodiments of the present application will be described in conjunction with the accompanying drawings and examples. The following examples are intended to illustrate the present application but are not intended to limit the scope of the present application.
Fig. 1 is a schematic structural diagram of a supply voltage detection system according to an embodiment of the present application, and as shown in fig. 1, the system at least includes: a processing component 110, a voltage detection component 120 and a driver circuit 130 communicatively coupled to the processing component 110, a motor 140 communicatively coupled to the driver circuit 130, and a power supply 150 communicatively coupled to the processing component 110.
Alternatively, the power supply voltage detection system may be applied to a hair dryer, and of course, may also be applied to other devices that need to perform power supply voltage detection, and this embodiment does not limit the application scenario of the power supply voltage detection system.
Alternatively, the power supply 150 is a direct current obtained by rectifying an alternating current through a rectifier circuit. The power supply 150 is used to provide a dc voltage to the motor 140.
The voltage detection assembly 120 is installed at an output terminal of the power supply 150. The voltage detecting component 120 is configured to detect a supply voltage of the power supply 150 and send the detected supply voltage to the processing component 110.
The processing component 110 is configured to determine a voltage detection time of the voltage detection component 120, and control the voltage detection component 120 to detect a power supply voltage of the power supply 150 at the voltage detection time.
The processing assembly 110 is also used for controlling the driving circuit 130 to drive the motor 140 to operate. Alternatively, the driving circuit 130 controls the motor to operate by outputting a control signal to the motor, and the control signal may be a square wave signal. The square wave signal includes a sine wave, a rectangular wave, etc., and the present embodiment does not limit the type of the square wave signal.
When the motor operates, the switching tube in the driving circuit 130 is periodically turned on and off, and at this time, the power supply voltage (or referred to as bus voltage) of the power supply 150 is periodically pulled down, for example: refer to the variation curve of the working voltage of the power supply during the motor working process shown in fig. 2. Based on this technical problem, the processing component 110 is configured to obtain a duty cycle of the motor 140; determining a voltage detection time based on a difference between the operating voltage of the power supply 150 and the target voltage at each operating time in the duty cycle; the voltage value of the power supply 150 is detected at the voltage detection timing to determine the power supply voltage of the power supply 150. The target voltage is the power supply voltage when the motor is not started when the power supply is used for supplying power to the motor. In this way, the processing component 110 may control the voltage detection component 120 to collect the working voltage of the power supply 150 at the designated time, and in combination with the voltage difference corresponding to the designated time, the working voltage meeting the target voltage may be determined, so as to improve the voltage detection precision.
Fig. 3 is a flowchart of a supply voltage detection method according to an embodiment of the present application, where the method is applied to the supply voltage detection system shown in fig. 1, and the main execution body of each step is exemplified by the processing element 110 in the system. The method at least comprises the following steps:
The manner of obtaining the duty cycle of the motor includes, but is not limited to: acquiring a control signal of a motor, and determining the period of the control signal as a working period; or acquiring the on-off period of a switching tube in a driving circuit of the control motor, and determining the on-off period as the working period.
Taking the operating voltage curve shown in fig. 2 as an example, the operating voltage first decreases and then increases during one operating period of the motor. At this time, the curve corresponding to the descending stage is the curve corresponding to the switch tube conducting process, and the curve corresponding to the ascending stage is the curve corresponding to the switch tube turning-off process.
The target voltage is a supply voltage when the motor is not turned on when the power supply is used for supplying power to the motor.
Optionally, the manner of determining the voltage detection time based on the difference between the operating voltage of the power supply at each operating time in the operating cycle and the target voltage includes, but is not limited to, the following:
the first method comprises the following steps: and determining a first working moment when the working voltage is the same as the target voltage in the working period, and determining the first working moment as the voltage detection moment.
In one example, the control signal of the motor is a square wave signal, and determining the working moment when the working voltage is the same as the target voltage in the working period comprises the following steps: determining the starting time of a working cycle as the working time; alternatively, the end time of the duty cycle is determined as the operating time.
Such as: for the operating voltage curve shown in fig. 2, the end of the operating cycle at time 21 is determined as the operating time, which corresponds to the same operating voltage as the supply voltage when the motor is not operating.
And the second method comprises the following steps: acquiring working voltage of each working moment in a working period; performing curve fitting on the change condition of the working voltage to obtain a working voltage curve; and determining a second working moment corresponding to the difference value between the maximum voltage value and the preset value in the working voltage curve as a voltage detection moment.
Assuming that the variation of the operating voltage is as shown in fig. 2, and the preset value is the difference between the maximum voltage value and the minimum voltage value, the second operating time is the time 22 corresponding to the minimum voltage value.
And step 303, detecting the voltage value of the power supply at the voltage detection moment to determine the power supply voltage of the power supply.
For the first voltage detection time determination method, the voltage value detected at the voltage detection time is the power supply voltage of the power supply.
For the second voltage detection timing determination method: detecting the voltage value of the power supply at the voltage detection moment; and determining the sum of the voltage value and the preset value as the power supply voltage of the power supply.
Such as: and when the preset value is the difference value between the maximum voltage value and the minimum voltage value on the working voltage curve and the voltage detection time is the working time corresponding to the minimum voltage value, the power supply voltage is the working voltage detected at the voltage detection time plus the preset value, and the obtained value is the same as the power supply voltage.
In summary, the supply voltage detection method provided by this embodiment obtains the working period of the motor; determining voltage detection time based on the difference between the working voltage of the power supply at each working time in the working period and the target voltage; detecting a voltage value of the power supply at the voltage detection moment to determine the power supply voltage of the power supply; the problem that the detected power supply voltage is low in precision due to the fact that the power supply voltage of the power supply is periodically pulled down when a switching tube in the driving circuit is periodically switched on and off when the motor runs can be solved; because the processing assembly can control the voltage detection assembly to collect the working voltage of the power supply at the appointed moment, the working voltage which accords with the target voltage can be determined by combining the difference value between the working voltage corresponding to the appointed moment and the target voltage, and the voltage detection precision is improved.
Fig. 4 is a block diagram of a supply voltage detection apparatus according to an embodiment of the present application, and this embodiment takes the processing component 110 of the supply voltage detection system shown in fig. 1 as an example for explanation. The device at least comprises the following modules: a period acquisition module 410, a time of day determination module 420, and a voltage detection module 430.
A period obtaining module 410, configured to obtain a working period of the motor;
a time determining module 420, configured to determine a voltage detection time based on a difference between a working voltage of each working time power supply in the working period and a target voltage, where the target voltage is a power supply voltage when the motor is not turned on when the power supply is used to supply power to the motor;
the voltage detection module 430 is configured to detect a voltage value of the power supply at the voltage detection time to determine a power supply voltage of the power supply.
For relevant details reference is made to the above-described method embodiments.
It should be noted that: in the above embodiment, when the supply voltage detection device detects the supply voltage, only the division of the functional modules is taken as an example, and in practical applications, the function distribution may be completed by different functional modules according to needs, that is, the internal structure of the supply voltage detection device is divided into different functional modules to complete all or part of the above-described functions. In addition, the power supply voltage detection device and the power supply voltage detection method provided by the above embodiments belong to the same concept, and specific implementation processes thereof are detailed in the method embodiments and are not described herein again.
Fig. 5 is a block diagram of a supply voltage detection apparatus according to an embodiment of the present application. The apparatus comprises at least a processor 501 and a memory 502.
Processor 501 may include one or more processing cores such as: 4 core processors, 8 core processors, etc. The processor 501 may be a Digital Signal Processing (DSP), a Field Programmable Gate Array (FPGA), or a Programmable Gate Array (PLA)
(Programmable Logic Array ) in a Programmable Logic Array. The processor 501 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state.
Memory 502 may include one or more computer-readable storage media, which may be non-transitory. Memory 502 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 502 is used to store at least one instruction for execution by processor 501 to implement the supply voltage detection method provided by method embodiments herein.
In some embodiments, the supply voltage detecting device may further include: a peripheral interface and at least one peripheral. The processor 501, memory 502 and peripheral interfaces may be connected by buses or signal lines. Each peripheral may be connected to the peripheral interface via a bus, signal line, or circuit board. Illustratively, peripheral devices include, but are not limited to: audio circuitry and power supplies, etc.
Of course, the supply voltage detection device may also include fewer or more components, which is not limited in this embodiment.
Optionally, the present application further provides a computer-readable storage medium, in which a program is stored, and the program is loaded and executed by a processor to implement the supply voltage detection method of the above method embodiment.
Optionally, the present application further provides a computer product, which includes a computer-readable storage medium, in which a program is stored, and the program is loaded and executed by a processor to implement the supply voltage detection method of the above-mentioned method embodiment.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for supply voltage detection, the method comprising:
acquiring the working period of the motor;
determining a voltage detection time based on a difference value between a working voltage of a power supply at each working time in the working period and a target voltage, wherein the target voltage is a power supply voltage when the motor is not started when the power supply is used for supplying power to the motor;
and detecting the voltage value of the power supply at the voltage detection moment so as to determine the power supply voltage of the power supply.
2. The method of claim 1, wherein determining the voltage detection time based on a difference between an operating voltage of the power supply and a target voltage at each operating time in the operating cycle comprises:
and determining a first working moment in the working period when the working voltage is the same as the target voltage, and determining the first working moment as the voltage detection moment.
3. The method according to claim 2, wherein the voltage value detected at the voltage detection time is a supply voltage of the power supply.
4. The method of claim 2, wherein the control signal of the motor is a square wave signal, and the determining the working time of the working voltage in the working period, which is the same as the target voltage, comprises:
determining the starting time of the working period as the working time; alternatively, the first and second electrodes may be,
and determining the end time of the working period as the working time.
5. The method of claim 1, wherein determining the voltage detection time based on a difference between an operating voltage of the power supply and a target voltage at each operating time in the operating cycle comprises:
acquiring working voltage of each working moment in the working period;
performing curve fitting on the change condition of the working voltage to obtain a working voltage curve;
and determining a second working moment corresponding to the difference value between the maximum voltage value and a preset value in the working voltage curve as the voltage detection moment.
6. The method of claim 5, wherein the detecting a voltage value of the power supply at the voltage detection time to determine a power supply voltage of the power supply comprises:
detecting a voltage value of the power supply at the voltage detection time;
and determining the sum of the voltage value and the preset value as the power supply voltage of the power supply.
7. The method of any of claims 1 to 6, wherein said obtaining a duty cycle of the motor comprises:
acquiring a control signal of the motor, and determining the period of the control signal as the working period;
alternatively, the first and second electrodes may be,
and acquiring the on-off period of a switch tube in a driving circuit for controlling the motor, and determining the on-off period as the working period.
8. A supply voltage detection apparatus, characterized in that the apparatus comprises:
the period acquisition module is used for acquiring the working period of the motor;
the time determining module is used for determining the voltage detection time based on the difference value between the working voltage of each working time power supply in the working period and a target voltage, wherein the target voltage is the power supply voltage when the motor is not started when the power supply is used for supplying power to the motor;
and the voltage detection module is used for detecting the voltage value of the power supply at the voltage detection moment so as to determine the power supply voltage of the power supply.
9. A supply voltage detection apparatus, characterized in that the apparatus comprises a processor and a memory; the memory stores therein a program that is loaded and executed by the processor to implement the supply voltage detection method according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that the storage medium has stored therein a program which, when being executed by a processor, is adapted to implement the supply voltage detection method according to any one of claims 1 to 7.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911346278.3A CN111025007B (en) | 2019-12-24 | 2019-12-24 | Power supply voltage detection method and device and storage medium |
| PCT/CN2020/137808 WO2021129544A1 (en) | 2019-12-24 | 2020-12-19 | Voltage detection and adaptation method, device control method and apparatus, and storage medium |
| JP2022538334A JP2023500984A (en) | 2019-12-24 | 2020-12-19 | Equipment control method, equipment control device and storage medium |
| CA3158881A CA3158881A1 (en) | 2019-12-24 | 2020-12-19 | Voltage detection and adaptation method, device control method, apparatus, and storage medium |
| US17/776,586 US20220385222A1 (en) | 2019-12-24 | 2020-12-19 | Voltage detection and adaptation method, device control method, apparatus, and storage medium |
| KR1020227021016A KR20220104215A (en) | 2019-12-24 | 2020-12-19 | Voltage detection and adaptation method, device control method, apparatus, and storage medium |
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| CN201911346278.3A CN111025007B (en) | 2019-12-24 | 2019-12-24 | Power supply voltage detection method and device and storage medium |
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| CN111025007A true CN111025007A (en) | 2020-04-17 |
| CN111025007B CN111025007B (en) | 2022-03-29 |
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Cited By (1)
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| WO2021129544A1 (en) * | 2019-12-24 | 2021-07-01 | 追创科技(苏州)有限公司 | Voltage detection and adaptation method, device control method and apparatus, and storage medium |
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