CN111323633A - Voltage peak value judgment device, power-off device and method - Google Patents
Voltage peak value judgment device, power-off device and method Download PDFInfo
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- CN111323633A CN111323633A CN201811535485.9A CN201811535485A CN111323633A CN 111323633 A CN111323633 A CN 111323633A CN 201811535485 A CN201811535485 A CN 201811535485A CN 111323633 A CN111323633 A CN 111323633A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 53
- 230000000630 rising effect Effects 0.000 claims abstract description 15
- 230000001934 delay Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/175—Indicating the instants of passage of current or voltage through a given value, e.g. passage through zero
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/021—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order
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Abstract
The invention belongs to the technical field of electrical detection, and discloses a voltage peak value judgment device which comprises a power supply device for supplying power to a detected device, and a zero-crossing detection circuit, wherein the zero-crossing detection circuit is used for detecting the zero-crossing time of the output voltage of the power supply device and generating a zero-crossing detection signal; and the timing device is used for timing according to the set time length from the rising edge or the falling edge of the zero-crossing detection signal. The invention utilizes the zero-crossing detection circuit to detect the zero-crossing time of the output voltage of the power supply device, and delays the preset fixed time length from the zero-crossing time, thus accurately capturing the voltage peak value time. The invention also discloses a voltage peak power-off device and a method.
Description
Technical Field
The invention relates to the technical field of electrical detection, in particular to a voltage peak value judgment device, a power failure device and a power failure method.
Background
Disclosure of Invention
The embodiment of the invention provides a voltage peak value judging device, a power-off device and a power-off method, and aims to solve the problems that the existing voltage peak value power-off means cannot accurately capture a voltage peak value, and is low in efficiency and poor in safety performance. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to a first aspect of the embodiments of the present invention, a voltage peak value determination apparatus is provided.
In some optional embodiments, the voltage peak determination device includes a power supply device for supplying power to the device under test, and further includes:
the zero-crossing detection circuit is used for detecting the zero-crossing time of the output voltage of the power supply device and generating a zero-crossing detection signal;
and the timing device is used for timing according to the set time length from the rising edge or the falling edge of the zero-crossing detection signal.
In some optional embodiments, the power supply device further comprises a waveform display device for displaying a waveform of the output voltage of the power supply device and a waveform of the zero-crossing detection signal.
According to a second aspect of embodiments of the present invention, a voltage peak power down device is provided.
In some optional embodiments, the voltage peak power-off device includes the aforementioned voltage peak determination device, and further includes:
the power supply switching device is used for controlling the connection or disconnection of the power supply device and a power supply circuit of the tested device;
and the controller is used for controlling the power supply switching device to disconnect the power supply device and a power supply circuit of the tested device at the time when the timing device finishes timing.
In some optional embodiments, the power supply device further comprises a waveform display device for displaying a waveform of the output voltage of the power supply device and a waveform of the zero-crossing detection signal.
In some optional embodiments, the output voltage of the power supply device passes through the power supply switch device and then is input to the waveform display device for display.
According to a third aspect of the embodiments of the present invention, there is provided a voltage peak value determination method.
In some optional embodiments, the voltage peak determination method includes:
detecting zero crossing time of output voltage of a power supply device and generating a zero crossing time detection signal;
and after delaying the set time length from the rising edge or the falling edge of the zero-crossing detection signal, timing according to the set time length.
According to a fourth aspect of embodiments of the present invention, a voltage peak power-down method is provided.
In some optional embodiments, the voltage peak power-down method comprises:
detecting the zero-crossing time of the output voltage of the power supply device to generate a zero-crossing detection signal;
starting timing from the rising edge or the falling edge of the zero-crossing detection signal;
after the timing is carried out for a set time, the power supply circuit of the power supply device and the tested device is disconnected.
In some alternative embodiments, the waveform of the power supply apparatus output voltage and the waveform of the zero-cross detection signal are displayed.
In some optional embodiments, the waveform of the output voltage of the power supply device is a stable waveform, and the waveform of the zero-crossing detection signal is a stable waveform.
In some optional embodiments, further comprising: and after the timing is carried out for a set time, the waveform of the output voltage of the power supply device is temporarily stopped to be displayed, and whether the position of waveform interruption is a voltage peak value is judged.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the zero-crossing detection circuit is used for detecting the zero-crossing moment of the output voltage of the power supply device, and the preset fixed duration is delayed from the zero-crossing moment, so that the voltage peak moment can be accurately captured, and a foundation is provided for realizing accurate ground voltage peak power-off.
After the peak value moment is accurately grabbed, accurate ground voltage peak value power-off can be realized through the power switch device.
By the voltage peak value judging device and the voltage peak value power-off device, the wave peak or the wave trough can be accurately grabbed at one time, the voltage peak value power-off is realized, the resources of testing equipment are saved, the efficiency of plug voltage testing is improved, and the device is safe and reliable.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a block diagram illustrating a circuit configuration of a voltage peak determination device according to an exemplary embodiment.
Fig. 2 is a waveform diagram illustrating an output signal of a zero-crossing detection circuit and an output voltage signal of a voltage device according to an exemplary embodiment.
Fig. 3 is a block diagram illustrating a circuit configuration of a voltage peak power down device according to an exemplary embodiment.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments herein to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in or substituted for those of others. The scope of the embodiments herein includes the full ambit of the claims, as well as all available equivalents of the claims. The terms "first," "second," and the like, herein are used solely to distinguish one element from another without requiring or implying any actual such relationship or order between such elements. In practice, a first element can also be referred to as a second element, and vice versa. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such structure, apparatus, or device. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a structure, device or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like herein, as used herein, are defined as orientations or positional relationships based on the orientation or positional relationship shown in the drawings, and are used for convenience in describing and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. In the description herein, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, and indirect connections via intermediary media, where the specific meaning of the terms is understood by those skilled in the art as appropriate.
Herein, the term "plurality" means two or more, unless otherwise specified.
Herein, the character "/" indicates that the preceding and following objects are in an "or" relationship. For example, A/B represents: a or B.
Herein, the term "and/or" is an associative relationship describing objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.
According to a first aspect of the embodiments of the present invention, there is provided a voltage peak value determination apparatus, as shown in fig. 1, the voltage peak value determination apparatus includes a power supply apparatus 12 for supplying power to a device under test 11, and further includes:
a zero-crossing detection circuit 13, configured to detect a zero-crossing time of the output voltage of the power supply device 12, and generate a zero-crossing detection signal;
and the timing device 14 is used for timing according to the set time length from the rising edge or the falling edge of the zero-crossing detection signal.
As shown in fig. 2, a waveform 1 is a power supply device output voltage waveform, and a waveform 2 is a waveform of the zero-cross detection signal. When the output voltage of the power supply device is converted from the negative half cycle to the positive half cycle and starts to rise through the zero position, the waveform of the zero-crossing detection signal is a rising edge 21. When the output voltage of the power supply device changes from positive half cycle to negative half cycle and starts to fall through the zero position, the waveform bit of the zero-crossing detection signal falls along the edge 22.
It can be known from the figure that the time difference between the zero-crossing time of the output voltage of the power supply device and each subsequent peak and trough is known and fixed, the time difference between the zero-crossing time converted from the negative half cycle to the positive half cycle and the adjacent peak is one fourth of the output voltage period of the power supply device, the time difference between the zero-crossing time and the next trough is one fourth of the output voltage period of the power supply device plus one half cycle, the time difference between the next peak is one fourth of the output voltage period of the power supply device plus one cycle, and so on. The time difference between the zero-crossing time converted from the positive half cycle to the negative half cycle and the adjacent wave trough is one fourth of the output voltage period of the power supply device, the time difference between the zero-crossing time and the adjacent wave trough is one fourth of the output voltage period of the power supply device plus one half period, the time difference between the zero-crossing time and the next wave trough is one fourth of the output voltage period of the power supply device plus one period, and the like. Therefore, the set time period Δ t can be expressed by the following equation:
wherein T is the period of the output voltage of the power supply device, and n is an integer.
Therefore, by adopting the technical scheme, the zero-crossing detection circuit is utilized to detect the zero-crossing time of the output voltage of the power supply device, and the preset fixed time duration is delayed from the zero-crossing time, so that the voltage peak value time can be accurately captured.
In some optional embodiments, the power supply device further comprises a waveform display device for displaying a waveform of the output voltage of the power supply device and a waveform of the zero-crossing detection signal.
By adopting the technical scheme, the waveform of the output voltage of the power supply device and the waveform of the zero-crossing detection signal are observed through the waveform display device, and after the waveforms are stable, the procedure of judging the voltage peak value is started, namely: and after delaying the set time length from the rising edge or the falling edge of the zero-crossing detection signal, timing according to the set time length.
According to a second aspect of the embodiments of the present invention, there is provided a voltage peak value power-off device, as shown in fig. 3, the voltage peak value judging device includes the aforementioned voltage peak value judging device, and further includes:
a power switch device 15 for controlling the connection or disconnection of the power supply device 12 and the power supply circuit of the device under test 11;
and a controller 16 for controlling the power switch device 15 to disconnect the power supply circuit between the power device 12 and the device under test 11 when the timing device 14 completes timing.
By adopting the technical scheme, after the voltage peak value moment is determined, the power switch device is automatically switched off through the controller, and the voltage peak value power-off is accurately realized more efficiently and safely.
In some optional embodiments, the set time duration is a first time difference between a rising edge or a falling edge of the zero-crossing detection signal and an adjacent peak value of the output voltage of the power supply device.
In some optional embodiments, the set duration is a sum of the first time difference and an integer multiple of half of the period of the power supply device output voltage.
In some alternative embodiments, the power switching device is disposed on a live line of the power device. When the power switch device is closed, the live wire is connected, so that the power supply is connected; when the power switching device is turned off, the live line is disconnected, thereby disconnecting the power supply.
In some alternative embodiments, the power switching device is a relay.
In some optional embodiments, the power supply device further comprises a waveform display device for displaying a waveform of the output voltage of the power supply device and a waveform of the zero-crossing detection signal.
By adopting the technical scheme, the waveform of the output voltage of the power supply device and the waveform of the zero-crossing detection signal are observed through the waveform display device, and after the waveforms are stable, the procedure of voltage peak power-off is started, namely: and judging the voltage peak value, and then switching off the power switch device.
In some optional embodiments, the output voltage of the power supply device passes through the power supply switch device and then is input to the waveform display device for display.
By adopting the technical scheme, the display of the output waveform of the power supply device is suspended while the power supply switch device is switched off, and whether accurate voltage peak power-off is realized or not can be determined by observing the position of waveform interruption. If the waveform image is not ideal, the procedure of voltage peak power-off is restarted, and if the waveform image is ideal, the voltage between the pins of the tested device during power-off can be output, so that the effective and accurate detection of the residual voltage of the tested device is realized.
According to a third aspect of the embodiments of the present invention, there is provided a voltage peak value determination method, including:
detecting the zero-crossing time of the output voltage of the power supply device to generate a zero-crossing detection signal;
and timing according to a set time length from the rising edge or the falling edge of the zero-crossing detection signal.
By adopting the technical scheme, the time difference between the rising edge or the falling edge of the zero-crossing detection signal and each voltage peak value is known and fixed, so that the voltage peak value moment can be accurately captured by delaying the preset fixed time length from the rising edge or the falling edge.
According to a fourth aspect of the embodiments of the present invention, there is provided a voltage peak power-off method, including:
detecting the zero-crossing time of the output voltage of the power supply device to generate a zero-crossing detection signal;
starting timing from the rising edge or the falling edge of the zero-crossing detection signal;
after the timing is carried out for a set time, the power supply circuit of the power supply device and the tested device is disconnected.
By adopting the technical scheme, accurate power failure of the voltage peak value is realized after the voltage peak value moment is determined.
In some optional embodiments, the voltage peak power-down method further comprises: and displaying the waveform of the output voltage of the power supply device and the waveform of the zero-crossing detection signal.
In some optional embodiments, the waveform of the output voltage of the power supply device is a stable waveform, and the waveform of the zero-crossing detection signal is a stable waveform.
In some optional embodiments, after the set time period, the waveform of the output voltage of the power supply device is paused to be displayed, and whether the position of the waveform interruption is the voltage peak value is judged.
In some optional embodiments, the set time duration is a first time difference between an initial time of the zero-crossing detection signal and an adjacent peak value of the output voltage of the power supply device.
In some optional embodiments, the set duration is a sum of the first time difference and an integer multiple of half of the period of the power supply device output voltage.
The present invention is not limited to the structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. A voltage peak value judging device comprises a power supply device for supplying power to a tested device, and is characterized by further comprising:
the zero-crossing detection circuit is used for detecting the zero-crossing time of the output voltage of the power supply device and generating a zero-crossing detection signal;
and the timing device is used for timing according to a set time length from the rising edge or the falling edge of the zero-crossing detection signal.
2. The voltage peak determination device according to claim 1, further comprising waveform display means for displaying a waveform of the power supply device output voltage and a waveform of the zero-cross detection signal.
3. A voltage peak power cut-off device comprising the voltage peak judging device according to claim 1, characterized by further comprising:
the power supply switching device is used for controlling the connection or disconnection of the power supply device and a power supply circuit of the tested device;
and the controller is used for controlling the power supply switching device to disconnect the power supply device and a power supply circuit of the tested device at the time when the timing device finishes timing.
4. The voltage peak power-off device according to claim 3, further comprising a waveform display device for displaying a waveform of the power supply device output voltage and a waveform of the zero-cross detection signal.
5. The apparatus according to claim 4, wherein the output voltage of the power supply apparatus is inputted to the waveform display apparatus for displaying after passing through the power switch apparatus.
6. A method for determining a voltage peak value, comprising:
detecting the zero-crossing time of the output voltage of the power supply device to generate a zero-crossing detection signal;
and timing according to a set time length from the rising edge or the falling edge of the zero-crossing detection signal.
7. A method of voltage peak power down, comprising:
detecting the zero-crossing time of the output voltage of the power supply device to generate a zero-crossing detection signal;
starting timing from the rising edge or the falling edge of the zero-crossing detection signal;
and when the timing is long, disconnecting the power supply circuit of the power supply device and the tested device.
8. The voltage peak power-off method according to claim 7, wherein a waveform of the power supply device output voltage and a waveform of the zero-cross detection signal are displayed.
9. The voltage peak power-off method according to claim 8, wherein the waveform of the output voltage of the power supply device is a stable waveform, and the waveform of the zero-crossing detection signal is a stable waveform.
10. The voltage peak power down method of claim 8 or 9, further comprising: and when the timing is long after the set time, the waveform of the output voltage of the power supply device is paused to be displayed, and whether the position of waveform interruption is the voltage peak value or not is judged.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811535485.9A CN111323633A (en) | 2018-12-14 | 2018-12-14 | Voltage peak value judgment device, power-off device and method |
| PCT/CN2019/076422 WO2020118913A1 (en) | 2018-12-14 | 2019-02-28 | Voltage peak value determining apparatus, power-cutting apparatus and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811535485.9A CN111323633A (en) | 2018-12-14 | 2018-12-14 | Voltage peak value judgment device, power-off device and method |
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| CN201811535485.9A Pending CN111323633A (en) | 2018-12-14 | 2018-12-14 | Voltage peak value judgment device, power-off device and method |
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| WO (1) | WO2020118913A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112014775A (en) * | 2020-09-25 | 2020-12-01 | 中国家用电器研究院 | Peak value automatic power-on and power-off device |
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| WO2020118913A1 (en) | 2020-06-18 |
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Application publication date: 20200623 |