CN116224199A - Standard sample for low-power measurement - Google Patents
Standard sample for low-power measurement Download PDFInfo
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- CN116224199A CN116224199A CN202310328465.9A CN202310328465A CN116224199A CN 116224199 A CN116224199 A CN 116224199A CN 202310328465 A CN202310328465 A CN 202310328465A CN 116224199 A CN116224199 A CN 116224199A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
- G01R35/007—Standards or reference devices, e.g. voltage or resistance standards, "golden references"
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Abstract
The invention relates to the technical field of electronic and electric appliance measurement, in particular to a standard sample for low-power measurement, which comprises the following components: the device comprises a shell and a measuring circuit, wherein the shell is provided with a gear change-over switch and an output interface; the measuring circuit is connected with external low-power measuring equipment through the output interface; the measuring circuit is used for providing a plurality of power test modes, and each power test mode corresponds to one power value; the gear change-over switch is used for switching the measuring circuit to a corresponding power test mode. The invention can measure the detection precision of the power measurement equipment and also can measure the detection capability of technical research and development departments and third-party detection institutions in the industry.
Description
Technical Field
The invention relates to the technical field of electronic and electric appliance measurement, in particular to a standard sample for low-power measurement.
Background
The power is one of the conventional measurement items in the field of electronic appliances and is used for measuring the work done by the electric product in unit time. The "low power" mode usually occurs when the electrical product is connected to the power grid but the main functional circuit is not working, the electrical product is in a waiting order input, or waiting for an awake state, at which point the power value is very small, typically less than 1W. With a household as a unit, if a plurality of products are in the electricity utilization state for 24 hours, small electric energy can be consumed in a year, and the energy conservation and the emission reduction are not facilitated. With the development of electronic and electrical technology, detection standards put new demands on "low power" measurements.
Meanwhile, the power measurement in the low power mode is also an important test item for measuring the capability of the detection mechanism, and because the current waveform is severely distorted and has smaller numerical value in the mode, strict requirements are put on the selection of detection equipment and the construction of a measurement line.
How to measure whether the measuring result of the detecting mechanism for low power is accurate and how to select the detecting device is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of this, the present invention provides a standard sample for low power measurement, which can measure the detection accuracy of the measuring device, and can also measure the detection accuracy level of some detecting mechanisms.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a standard sample for low power measurement, comprising: the device comprises a shell and a measuring circuit, wherein the shell is provided with a gear change-over switch and an output interface; the measuring circuit is connected with external low-power measuring equipment through the output interface;
the measuring circuit is used for providing a plurality of power test modes, and each power test mode corresponds to one power value;
the gear change-over switch is used for switching the measuring circuit to a corresponding power test mode.
Further, the measurement circuit includes: a switching power supply transformer, a first load, a second load, a third load, a first switch, a second switch, and a third switch;
the input end of the switching power supply transformer is connected with the power grid voltage, and the output end of the switching power supply transformer is sequentially connected with a first load, a second load and a third load in parallel;
the first switch and the second switch are sequentially connected between the first load and the second load; the third switch is connected between the first switch and a third load.
Further, the first switch, the second switch and the third switch are all double-pole single-throw switches.
Further, when the first switch, the second switch and the third switch are all turned off, the switching power supply transformer and the first load form a first load loop, and after the first load loop is electrified, the power of the first load loop is a first power value;
when the first switch and the second switch are closed and the third switch is opened, the switching power supply transformer, the first load and the second load form a second load loop, and after the first switch and the second switch are electrified, the power of the second load loop is a second power value;
when the first switch and the third switch are closed and the second switch is opened, the switching power supply transformer, the first load and the third load form a third load loop, and after the first switch and the third switch are electrified, the power of the third load loop is a third power value;
when the first switch, the second switch and the third switch are all closed, the switching power supply transformer, the first load, the second load and the third load form a fourth load loop, and after the power is supplied, the power of the fourth load loop is a fourth power value.
Further, the measurement circuit further includes: an indicator light; the indicator light is connected in parallel between the second load and the third load.
Further, the indicator light is mounted on the top of the housing.
Further, the first load, the second load and the third load are respectively formed by serially connecting a plurality of precise resistors with precision of one thousandth.
Furthermore, the shell is provided with a power line socket, one end of the power line is connected with an external alternating current power supply, and the other end of the power line is connected with the power line socket in a pluggable manner.
Further, the gear change-over switch is a rotary switch, and the gear corresponds to the number of power measurement modes.
Further, the housing is assembled from a plurality of cover plates.
Compared with the prior art, the invention discloses a standard sample for low-power measurement, which can provide various loads under the switching of a gear change-over switch, and when the current is electrified, different power values can be formed when the current passes through the loads, and the power values can be used as standard values. On one hand, the standard sample can be used for checking the power measurement equipment with different measurement requirements, when the detection precision of a certain power measurement equipment is measured, the standard sample is connected into the power measurement equipment and is switched to a corresponding power measurement mode to play the role of a measured load, and the detection precision of the power measurement equipment can be measured by comparing the difference between the power value displayed by the power measurement equipment and the standard value under the corresponding gear. On the other hand, the accuracy of the power measurement device in different power measurement modes can be measured by comparing the difference between the measured value and the standard value of the power measurement device in different gears, so that the power measurement device is suitable for detecting which power value.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a measurement circuit according to the present invention;
FIG. 2 is a schematic view of the front panel of the housing according to the present invention;
fig. 3 is a schematic structural view of a rear panel of the housing provided by the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention discloses a standard sample for low-power measurement, which comprises the following components: the device comprises a shell and a measuring circuit, wherein the shell is provided with a gear change-over switch and an output interface; the measuring circuit is connected with external low-power measuring equipment through an output interface;
the measuring circuit is used for providing a plurality of power test modes, and each power test mode corresponds to one power value;
the gear change-over switch is used for switching the measuring circuit to a corresponding power test mode.
In one particular embodiment, as shown in FIG. 1, the measurement circuit includes: the switching power supply comprises a switching power supply transformer, a first load R1, a second load R2, a third load R3, a first switch K1, a second switch K2 and a third switch K3;
the input end of the switching power supply transformer is connected with the power grid voltage, and the output end of the switching power supply transformer is sequentially connected with a first load R1, a second load R2 and a third load R3 in parallel;
the first switch K1 and the second switch K2 are sequentially connected between the first load R1 and the second load R2; the third switch K3 is connected between the first switch K1 and the third load R3.
The first switch K1, the second switch K2 and the third switch K3 are all double-pole single-throw switches.
Specifically, when the first switch K1, the second switch K2 and the third switch K3 are all turned off, the switching power supply transformer is connected to 220V voltage, after rectifying and filtering, 5V direct current voltage is output, the switching power supply transformer and the first load R1 form a first load loop, and the internal resistance of the first load loop is the internal resistance of the switching power supply transformer plus the internal resistance of the first load R1, corresponding to the first test mode. After being electrified, the current passes through the first load loop and generates a power value, and the power value is recorded as a first power value P1;
when the first switch K1 and the second switch K2 are closed and the third switch K3 is opened, a second load loop is formed by the switch power supply transformer, the first load R1 and the second load R2, and the internal resistance of the second load loop is the internal resistance of the switch power supply transformer, the internal resistance of the first load R1 and the internal resistance of the second load R2 after being connected in parallel, which corresponds to a second test mode; after being electrified, the current passes through the second load loop to generate a power value, and the power value is recorded as a second power value P2;
when the first switch K1 and the third switch K3 are closed and the second switch K2 is opened, a third load loop is formed by the switching power supply transformer, the first load R1 and the third load R3, and the internal resistance of the third load loop is the internal resistance of the switching power supply transformer, the internal resistance of the first load R1 and the internal resistance of the third load R3 after being connected in parallel, and corresponds to a test mode III; after being electrified, the current passes through the third load loop and generates a power value, and the power value is recorded as a third power value P3;
when the first switch K1, the second switch K2 and the third switch K3 are all closed, a fourth load loop is formed by the switching power supply transformer, the first load R1, the second load R2 and the third load R3, and the internal resistance of the fourth load loop is the internal resistance of the switching power supply transformer, the internal resistance of the first load R1, the internal resistance of the second load R2 and the internal resistance of the third load R3 after being connected in parallel, and corresponds to a test mode four; after the current is electrified, the current passes through the fourth load loop and generates a power value, which is marked as a fourth power value P4.
In other embodiments, the measurement circuit further comprises: an indicator light; the indicator light is connected in parallel between the second load and the third load. When the test mode is in one, the indicator light is not on; and when the test mode is in the second, third and fourth modes, the indicator lamp is lighted.
Specifically, the indicator light is mounted on top of the housing.
In one embodiment, the first load R1, the second load R2 and the third load R3 are respectively composed of a plurality of precision resistors with precision of one thousandth in series. The serial number of each load to the precise resistor is designed according to actual requirements, and the measurement power under different test modes is adjusted by adjusting the serial number of each load to the resistor.
As shown in fig. 2-3, the casing 1 is provided with a power line socket 2, one end of the power line is connected with an external alternating current power supply, and the other end of the power line is connected with the power line socket in a pluggable manner, wherein the external alternating current power supply is the power supply in the tested circuit. The detachable mode of the power line and the shell is adopted, so that the space can be saved, and the transportation is convenient.
The gear change-over switch 3 is a rotary switch, and its gear corresponds to the number of power measurement modes. When testing, the test circuit is connected to an external alternating current power supply (namely an internal power supply of external low-power measuring equipment) through the power line socket and the power line.
The shell 1 is also provided with a 0/1 main switch, when the main switch is at 1, the power supply is switched on, then the corresponding power measurement mode is entered, and when the main switch is at 0, the sample is in a non-working state.
The housing 1 is assembled from a plurality of cover plates, and the relevant marks on the cover plates are formed by screen printing, and the housing surface is subjected to oxidation treatment.
In the embodiment of the invention, the size of the standard sample shell is 91-100 cm long and wide, and the material is aluminum alloy.
In the embodiment of the invention, the standard sample is a component such as a resistor, a diode, a switching power supply transformer and the like with high precision, and an electronic component manufactured by a regular manufacturer is selected. The assembled standard sample is subjected to thermal stability and power-on aging test, namely, the standard sample selects different modes under rated voltage, and after 12 hours of continuous power-on, the standard sample has normal power without overheating phenomenon. Finally, a damping material is arranged in the standard sample packaging box, and the waterproof buffer material is covered outside the packaging box, so that the integrity of the standard sample in the transportation process is ensured.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A standard sample for low power measurement, comprising: the device comprises a shell and a measuring circuit, wherein the shell is provided with a gear change-over switch and an output interface; the measuring circuit is connected with external low-power measuring equipment through the output interface;
the measuring circuit is used for providing a plurality of power test modes, and each power test mode corresponds to one power value;
the gear change-over switch is used for switching the measuring circuit to a corresponding power test mode.
2. The standard sample for low power measurement of claim 1, wherein the measurement circuit comprises: a switching power supply transformer, a first load, a second load, a third load, a first switch, a second switch, and a third switch;
the input end of the switching power supply transformer is connected with the power grid voltage, and the output end of the switching power supply transformer is sequentially connected with a first load, a second load and a third load in parallel;
the first switch and the second switch are sequentially connected between the first load and the second load; the third switch is connected between the first switch and a third load.
3. The standard sample for low power measurement of claim 2, wherein the first switch, the second switch, and the third switch are all double pole single throw switches.
4. The standard sample for low power measurement according to claim 2, wherein when the first switch, the second switch and the third switch are all turned off, the switching power supply transformer and the first load form a first load loop, and after being energized, the power of the first load loop is a first power value;
when the first switch and the second switch are closed and the third switch is opened, the switching power supply transformer, the first load and the second load form a second load loop, and after the first switch and the second switch are electrified, the power of the second load loop is a second power value;
when the first switch and the third switch are closed and the second switch is opened, the switching power supply transformer, the first load and the third load form a third load loop, and after the first switch and the third switch are electrified, the power of the third load loop is a third power value;
when the first switch, the second switch and the third switch are all closed, the switching power supply transformer, the first load, the second load and the third load form a fourth load loop, and after the power is supplied, the power of the fourth load loop is a fourth power value.
5. The standard sample for low power measurement of claim 1, wherein the measurement circuit further comprises: an indicator light; the indicator light is connected in parallel between the second load and the third load.
6. The standard for low power measurements of claim 5, wherein the indicator light is mounted on top of the housing.
7. The standard sample for low power measurement according to claim 1, wherein the first load, the second load and the third load are each composed of a number of precision resistors with an accuracy of one thousandth in series.
8. The standard sample for low power measurement according to claim 1, wherein the housing has a power cord socket thereon, one end of the power cord is connected to an external ac power source, and the other end is connected to the power cord socket in a pluggable manner.
9. The standard sample for low power measurement according to claim 1, wherein the gear change switch is a rotary switch and its gear corresponds to the number of power measurement modes.
10. The standard for low power measurements of claim 1, wherein the housing is assembled from a plurality of cover plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310328465.9A CN116224199A (en) | 2023-03-30 | 2023-03-30 | Standard sample for low-power measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310328465.9A CN116224199A (en) | 2023-03-30 | 2023-03-30 | Standard sample for low-power measurement |
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| Publication Number | Publication Date |
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| CN116224199A true CN116224199A (en) | 2023-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310328465.9A Pending CN116224199A (en) | 2023-03-30 | 2023-03-30 | Standard sample for low-power measurement |
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| CN101615153A (en) * | 2008-06-26 | 2009-12-30 | 鸿富锦精密工业（深圳）有限公司 | The USB interface device for testing power |
| CN102798831A (en) * | 2011-05-26 | 2012-11-28 | 鸿富锦精密工业（深圳）有限公司 | Circuit load device |
| CN203722481U (en) * | 2014-03-06 | 2014-07-16 | 中华人民共和国上海出入境检验检疫局 | A capacity-adjustable energy-saving alternating current stabilized-voltage power supply |
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| CN111141940A (en) * | 2020-02-18 | 2020-05-12 | 工业和信息化部威海电子信息技术综合研究中心 | Test circuit |
| CN112305332A (en) * | 2019-07-30 | 2021-02-02 | 株洲中车时代电气股份有限公司 | Load device for railway vehicle converter test |
| CN213398840U (en) * | 2020-10-23 | 2021-06-08 | 罗格朗智能电气(惠州)有限公司 | Switch performance test equipment, test cabinet and test system |
| CN215297516U (en) * | 2021-04-21 | 2021-12-24 | 杭州高电科技有限公司 | Transformer capacity parameter tester with power output |
-
2023
- 2023-03-30 CN CN202310328465.9A patent/CN116224199A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615153A (en) * | 2008-06-26 | 2009-12-30 | 鸿富锦精密工业（深圳）有限公司 | The USB interface device for testing power |
| CN102798831A (en) * | 2011-05-26 | 2012-11-28 | 鸿富锦精密工业（深圳）有限公司 | Circuit load device |
| CN203722481U (en) * | 2014-03-06 | 2014-07-16 | 中华人民共和国上海出入境检验检疫局 | A capacity-adjustable energy-saving alternating current stabilized-voltage power supply |
| CN109813984A (en) * | 2019-02-27 | 2019-05-28 | 大禹电气科技股份有限公司 | A kind of the power cell test macro and its test method of high-voltage frequency converter |
| CN112305332A (en) * | 2019-07-30 | 2021-02-02 | 株洲中车时代电气股份有限公司 | Load device for railway vehicle converter test |
| CN111141940A (en) * | 2020-02-18 | 2020-05-12 | 工业和信息化部威海电子信息技术综合研究中心 | Test circuit |
| CN213398840U (en) * | 2020-10-23 | 2021-06-08 | 罗格朗智能电气(惠州)有限公司 | Switch performance test equipment, test cabinet and test system |
| CN215297516U (en) * | 2021-04-21 | 2021-12-24 | 杭州高电科技有限公司 | Transformer capacity parameter tester with power output |
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