CN220490949U - Electrical parameter detection circuit and electronic device - Google Patents
Electrical parameter detection circuit and electronic device Download PDFInfo
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- CN220490949U CN220490949U CN202322004234.0U CN202322004234U CN220490949U CN 220490949 U CN220490949 U CN 220490949U CN 202322004234 U CN202322004234 U CN 202322004234U CN 220490949 U CN220490949 U CN 220490949U
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- 238000002955 isolation Methods 0.000 claims description 10
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- 238000007599 discharging Methods 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 2
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 11
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- 229920000642 polymer Polymers 0.000 description 1
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Abstract
The utility model relates to the technical field of electronics, an electric parameter detection circuit and electronic equipment is provided, electric parameter detection circuit is through obtaining the sound of howling of inductance or electric capacity in the power conversion circuit, obtain corresponding detected signal according to the amplitude of the sound of howling, processing module can obtain the operating parameter of corresponding power conversion circuit according to detected signal, when this electric parameter detection circuit is applied to some products that have sound detection sensor, thereby need not set up independent detection circuit and detect power conversion circuit and obtain operating parameter, also need not set up communication module alone and transmit this operating parameter, the cost is saved.
Description
Technical Field
The application belongs to the technical field of electronics, and particularly relates to an electric parameter detection circuit and electronic equipment.
Background
Outdoor solar electronic products often adopt lithium battery storage electric quantity, such as camera equipment, lighting equipment and the like, and for products designed by separating a host machine from the lithium battery, the existing scheme for testing the lithium battery electric quantity is to test the output voltage of the lithium battery and estimate the lithium battery electric quantity according to the output voltage of the lithium battery. When a battery management system (Battery Management System, BMS) exists in the battery protection chip, the output voltage and the lithium battery voltage are different due to the existence of the charging and discharging diodes, and the lithium battery is in a charging state, the output voltage can suddenly rise, and the test electric quantity is inaccurate.
Moreover, for the user, if the charging condition of the lithium battery can be obtained in real time, whether the charging module such as the photovoltaic panel is installed in place or not can also be confirmed. Therefore, if the host can acquire the charging power of the lithium battery in real time, the electric quantity of the lithium battery can be estimated better. The common solution is to use a single-chip microcomputer to measure the data such as the charge and discharge current and the electric quantity of the battery and transmit the data to the host computer in a wired or wireless mode, but the modes all increase extra hardware cost due to the dependence on the single-chip microcomputer and a data transmission link.
Disclosure of Invention
The utility model aims to provide an electrical parameter detection circuit and an electronic device, and aims to solve the problem that the cost for detecting the charging state of a battery in the related technology is high.
In a first aspect, embodiments of the present application provide an electrical parameter detection circuit, including:
the first sound detection module is arranged opposite to the inductor or the capacitor of the power conversion circuit, and is used for picking up howling sounds of the inductor and/or the capacitor when the power conversion circuit performs power conversion and outputting a first detection signal representing the amplitude of the howling sounds;
and the processing module is connected with the first sound detection module and is used for obtaining working parameters of the power conversion circuit for power conversion according to the first detection signal, wherein the working parameters are positively correlated with the first detection signal.
In an alternative embodiment, the processing module includes:
the analog-to-digital conversion unit is connected with the first sound detection module and is used for converting the first detection signal from an analog signal to a digital signal;
and the processing unit is connected with the analog-to-digital conversion unit and is used for obtaining working parameters of the power conversion circuit for power conversion according to the first detection signal of the digital signal.
In an optional embodiment, the device further comprises a filtering unit, connected to the first sound detection module, for filtering and denoising the first detection signal;
the processing module is specifically configured to obtain the working parameter according to the first detection signal after noise reduction.
In an alternative embodiment, the filtering unit is integrated in the processing module or connected between the first sound detection module and the processing unit.
In an alternative embodiment, the audio isolation film is further included, and the audio isolation film is disposed between the first sound detection module and the inductor and/or the capacitor, and is used for filtering low-frequency noise in the howling sound.
In an optional embodiment, the device further comprises a second sound detection module, wherein the second sound detection module is connected with the processing module and is used for picking up environmental sound and outputting a second detection signal;
the processing module is further configured to filter noise caused by the environmental sound from the first detection signal according to the second detection signal.
In an alternative embodiment, the operating parameters include one or more of output power, output current, and output voltage.
In a second aspect, an embodiment of the present application provides an electronic device, including a host, where the host uses a detachable power supply module to supply power, and a power conversion circuit for charging and discharging is disposed in the power supply module, and the host includes an electrical parameter detection circuit as described above.
In an alternative embodiment, the power module includes an adapter or a battery module, and the host includes an image capturing device, a network device, or a lighting device.
In an alternative embodiment, a photovoltaic panel is further included, the photovoltaic panel being coupled to the battery module for charging the battery module and/or powering the host.
Compared with the related art, the embodiment of the application has the beneficial effects that: the electric parameter detection circuit obtains the corresponding detection signal according to the amplitude of the howling sound by obtaining the howling sound of the inductance and/or the capacitance in the power conversion circuit, and the processing module can obtain the working parameter of the corresponding power conversion circuit according to the detection signal.
Drawings
Fig. 1 is a schematic structural diagram of an electrical parameter detecting circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of an electrical parameter detecting circuit according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of an electrical parameter detecting circuit according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of an electrical parameter detecting circuit according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of an electrical parameter detecting circuit according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1, an embodiment of the present application provides an electrical parameter detecting circuit 100, which includes a first sound detecting module 110 and a processing module 120.
The first sound detection module 110 is disposed opposite to the inductor or the capacitor of the power conversion circuit 200, and is configured to pick up howling sound of the inductor or the capacitor when the power conversion circuit 200 performs power conversion, and output a first detection signal indicating an amplitude of the howling sound; the processing module 120 is connected to the first sound detection module 110, and is configured to obtain an operating parameter of the power conversion circuit 200 for performing power conversion according to the first detection signal, where the operating parameter is positively correlated with the first detection signal.
The first sound detection module 110 is, for example, a microphone or a device that can form the function of a microphone. When the electrical parameter detecting circuit 100 is applied to a product, the first sound detecting module 110 may be a module of the product which is self-contained due to its inherent function, for example, it is applied to an image capturing device, which generally has at least one microphone, and then the microphone thereof may be directly used as the first sound detecting module 110; and when applied to, for example, a network device, a lighting device, the first sound detection module 110 needs to be separately provided because of its inherent function without a pickup module. Likewise, the processing module 120 may also use a module inherent to the applied product, such as a controller in an image capturing apparatus, a network apparatus, a lighting apparatus. In this way, costs can be saved for the product.
It will be appreciated that the processing module 120 stores a table corresponding to the amplitude of the howling sound (i.e., the first detection signal) and the operating parameter, so that after the howling sound of the inductance or the capacitance is detected to obtain the amplitude of the howling sound when the power conversion circuit 200 performs power conversion, the processing module 120 can obtain the operating parameter, such as one or more of the output power, the output current, and the output voltage, when the power conversion circuit 200 performs power conversion through table lookup. Wherein the operating parameter is positively correlated with the first detection signal, i.e. the amplitude of the howling sound represents the greater the operating parameter at power conversion.
In addition, the power conversion circuit 200 may be provided as a charge-discharge circuit in a battery module or an adapter, which may be detachably connected with the product main body; in this case, the operating parameters are the operating parameters of the charge-discharge circuit, such as charge-discharge power, charge-discharge current, and charge-discharge voltage. The power conversion circuit 200 is, for example, a boost (boost) circuit, a buck (buck) circuit, a buck-boost (boost-buck) circuit, or a flyback switching power supply (Fly-back) circuit.
Referring to fig. 2, in an alternative embodiment, the processing module 120 includes an analog-to-digital conversion unit 121 and a processing unit 122.
The analog-to-digital conversion unit 121 is connected to the first sound detection module 110, and is configured to convert the first detection signal from an analog signal to a digital signal; the processing unit 122 is connected to the analog-to-digital conversion unit 121, and is configured to obtain an operating parameter of the power conversion circuit 200 for performing power conversion according to the first detection signal of the digital signal.
It will be appreciated that the first detection signal output by the first sound detection module 110 is typically an analog signal, and therefore in this case, the analog-to-digital conversion unit 121 is required to convert it into a digital signal so that the processing module 120 can recognize and process the first detection signal. In addition, the processing unit 122 includes a microprocessor, such as a single-chip microcomputer, and the analog-to-digital conversion unit 121 may be disposed as a discrete component outside the processing unit 122 or integrated into the microprocessor.
Since the first sound detection module 110 picks up the ambient sound when picking up the howling sound, and there is also electromagnetic interference generated by the circuit itself when the circuit is operating, the first detection signal needs to be filtered and then processed by the processing module 120, so that the obtained detection result (operating parameter) is more accurate. Thus, referring to fig. 3, in an alternative embodiment, the electrical parameter detecting circuit 100 further includes a filtering unit 130 connected to the first sound detecting module 110 for performing filtering noise reduction on the first detected signal; the processing module 120 is specifically configured to obtain the working parameter according to the first detection signal after noise reduction.
It should be noted that, in connection with the above embodiment, the filtering unit 130 may be disposed before the analog-to-digital conversion unit 121, and output the first detection signal to the analog-to-digital conversion unit 121 after filtering, in which case, the filtering unit 130 may employ an analog filter. The filtering unit 130 may be disposed after the analog-to-digital conversion unit 121, and after performing analog-to-digital conversion on the first detection signal, the filtering unit 130 filters the first detection signal, in which case the filtering unit 130 may employ a digital filter, and the digital filter may be integrated into the processing unit 122, or may be disposed as a discrete component outside the processing unit 122. From another point of view, i.e. the filtering unit 130 is integrated in the processing module 120 or connected between the first sound detection module 110 and the processing unit 122.
As an example, the filtering unit 130 attenuates high frequency portions of ambient sound and/or electromagnetic interference, such as filtering out detection signals of frequencies above 8 KHz.
Referring to fig. 4, in an alternative embodiment, the electrical parameter detecting circuit 100 further includes an audio isolation film 140, where the audio isolation film 140 is disposed between the first sound detecting module 110 and the inductor or the capacitor, for filtering low-frequency noise in the howling sound.
In one example, the power conversion circuit 200 may be provided in a battery module or an adapter, the housing 201 of which requires an opening 210 in a corresponding location of an inductance or capacitance so that howling sound can be transmitted out and picked up by the first sound detection module 110 when howling is generated. The audio isolation film 140 will be disposed on the opening 210 to reduce noise of the first sound detection module 110 picking up the howling sound.
The audio isolation membrane 140 comprises a polymeric material such as a polyurethane polymer. The aperture 210 is, for example, 2mm diameter circular, then the size of the audio isolation diaphragm will fit the size of the aperture 210. In addition, it should be noted that the audio isolation diaphragm 140 is an unnecessary component in some embodiments and may be eliminated.
Referring to fig. 5, in an alternative embodiment, the electrical parameter detecting circuit 100 further includes a second sound detecting module 150, where the second sound detecting module 150 is connected to the processing module 120, and is configured to pick up ambient sound and output a second detection signal; the processing module 120 is further configured to filter noise caused by the environmental sound from the first detection signal according to the second detection signal.
It will be appreciated that the second sound detection module 150 is another microphone on the device that is spaced a distance from the first sound detection module 110 to avoid picking up the target sound (i.e., howling). Of course, the second sound detection module 150 may also use the same microphone as the first sound detection module 110 to acquire the second detection signal at a different time (e.g., a previous time or a subsequent time) than the first detection signal is acquired. The second detection signal may be filtered and analog-to-digital converted before entering the processing unit 122, and the processing unit 122 will filter the second detection signal on the first detection signal, so as to obtain the target sound.
Referring to fig. 6, in a second aspect, an electronic device is provided, where the electronic device includes a host 10, the host 10 uses a detachable power supply module 20 to supply power, a power conversion circuit 200 for charging and discharging is disposed in the power supply module 20, and the host 10 includes an electrical parameter detection circuit 100 as described above.
The electronic device can obtain the operating state of the power supply module 20 by the low-cost electrical parameter detection circuit 100, and can confirm whether the power supply module 20 and the host 10 are properly mounted.
In an alternative embodiment, the power module 20 includes an adapter or a battery module, and the host 10 includes an image capturing device, a network device, or a lighting device. In the example shown in fig. 6, the power supply module 20 is a battery module, and the battery module includes a battery, a battery management chip, and a power conversion circuit 200, where the power conversion circuit 200 includes a charging chip and an inductor or capacitor associated with the charging chip. The inductor or capacitor is disposed opposite to the opening 210 of the case 201, and the audio isolation film 140 is disposed on the opening 210.
In an alternative embodiment, the electronic device further comprises a photovoltaic panel 30, the photovoltaic panel 30 being connected to the battery module (i.e. the power supply module 20) for charging the battery module and/or for supplying power to the host 10.
In one example, as shown in table 1 below, the processing module 120 may obtain the corresponding detection signal according to the magnitude of the howling sound by obtaining the howling sound of the inductance of the power conversion circuit 200, and the processing module 120 may obtain the corresponding operation parameter of the power conversion circuit 200 according to the detection signal.
Table 1:
note that: the howling amplitude is strongly correlated with the "microphone and inductance and/or capacitance distance", the smaller the distance, the larger the amplitude data.
The charging power of the photovoltaic panel 30 has two directions: for charging the battery module and powering the camera (i.e., host 10). In combination with table 1, the camera power 2W is taken as an example, and the inductor howling overload point is set to 2W.
1. When the charging power of the photovoltaic panel 30 is less than 2W, the charging power is insufficient to supply power to the camera, the battery module discharges, and the inductor is not overloaded and does not whistle.
2. The light is strong, and the charging power of the photovoltaic panel 30 is more than 2W, and the charging power not only supplies power to the camera, but also charges the battery module. As the charging power increases, the charging current increases and overload causes inductive squeal to be more pronounced. The greater the charging power, the greater the howling magnitude, with positive correlation.
Compared with the related art, the embodiment of the application has the beneficial effects that: the electric parameter detecting circuit 100 obtains the corresponding detecting signal according to the amplitude of the howling sound by obtaining the howling sound of the inductance or the capacitance in the power converting circuit 200, the processing module 120 can obtain the corresponding working parameter of the power converting circuit 200 according to the detecting signal, when the electric parameter detecting circuit 100 is applied to some products with sound detecting sensors, the independent detecting circuit is not required to be arranged to detect the power converting circuit 200 so as to obtain the working parameter, and the communication module is not required to be arranged to transmit the working parameter, so that the cost is saved.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (10)
1. An electrical parameter sensing circuit, comprising:
the first sound detection module is arranged opposite to the inductor or the capacitor of the power conversion circuit, and is used for picking up howling sounds of the inductor and/or the capacitor when the power conversion circuit performs power conversion and outputting a first detection signal representing the amplitude of the howling sounds;
and the processing module is connected with the first sound detection module and is used for obtaining working parameters of the power conversion circuit for power conversion according to the first detection signal, wherein the working parameters are positively correlated with the first detection signal.
2. The electrical parameter sensing circuit of claim 1, wherein the processing module comprises:
the analog-to-digital conversion unit is connected with the first sound detection module and is used for converting the first detection signal from an analog signal to a digital signal;
and the processing unit is connected with the analog-to-digital conversion unit and is used for obtaining working parameters of the power conversion circuit for power conversion according to the first detection signal of the digital signal.
3. The electrical parameter detecting circuit according to claim 2, further comprising a filtering unit connected to the first sound detecting module for filtering and noise reducing the first detected signal;
the processing module is specifically configured to obtain the working parameter according to the first detection signal after noise reduction.
4. An electrical parameter sensing circuit according to claim 3, wherein the filtering unit is integrated in the processing module or connected between the first sound sensing module and the processing unit.
5. The electrical parameter detection circuit of claim 1, further comprising an audio isolation membrane disposed between the first sound detection module and the inductor and/or the capacitor for filtering low frequency noise in the squeal sound.
6. The electrical parameter sensing circuit of any one of claims 1-5, further comprising a second sound sensing module coupled to the processing module for picking up ambient sound and outputting a second sensed signal;
the processing module is further configured to filter noise caused by the environmental sound from the first detection signal according to the second detection signal.
7. An electrical parameter sensing circuit as claimed in any one of claims 1 to 5, wherein the operating parameter comprises one or more of output power, output current and output voltage.
8. An electronic device comprising a host which is supplied with power using a detachable power supply module in which a power conversion circuit for charging and discharging is provided, characterized in that the host comprises the electrical parameter detection circuit according to any one of claims 1 to 7.
9. The electronic device of claim 8, wherein the power module comprises an adapter or a battery module and the host comprises a camera device, a network device, or a lighting device.
10. The electronic device of claim 9, further comprising a photovoltaic panel connected to the battery module for charging the battery module and/or powering the host.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322004234.0U CN220490949U (en) | 2023-07-27 | 2023-07-27 | Electrical parameter detection circuit and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322004234.0U CN220490949U (en) | 2023-07-27 | 2023-07-27 | Electrical parameter detection circuit and electronic device |
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| Publication Number | Publication Date |
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| CN220490949U true CN220490949U (en) | 2024-02-13 |
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| CN202322004234.0U Active CN220490949U (en) | 2023-07-27 | 2023-07-27 | Electrical parameter detection circuit and electronic device |
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