CN112630528B - Miniature multifunctional power consumption tester - Google Patents
Miniature multifunctional power consumption tester Download PDFInfo
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- CN112630528B CN112630528B CN202011478748.4A CN202011478748A CN112630528B CN 112630528 B CN112630528 B CN 112630528B CN 202011478748 A CN202011478748 A CN 202011478748A CN 112630528 B CN112630528 B CN 112630528B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/06—Arrangements for measuring electric power or power factor by measuring current and voltage
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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
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses a miniature multifunctional power consumption tester which comprises a 220V input socket of mains supply, a 220V output socket of mains supply, a current clamp interface, a voltage clamp interface, a control switch, a current transformer, a voltage signal acquisition module, a current signal acquisition module, a DSP signal operation module, an ARM control module, a high-precision crystal oscillator, a 485 communication module and a wireless communication module. The invention can realize measurement, observation and record of power consumption conditions of various electric equipment by structural design of connection of the internal circuit units of the miniature multifunctional power consumption tester, and can independently calibrate and verify, thus having high calibration precision; the power consumption of various electric equipment can be conveniently measured without attaching to the power output of a special calibrating device; the tester can be used alone or combined with a power verification device.
Description
Technical Field
The invention relates to a measuring device for power consumption parameters of electric equipment, in particular to a miniature multifunctional power consumption tester.
Background
The power consumption measuring circuit module is integrated with voltage coil power consumption measuring units, current coil power consumption measuring units, units responsible for calculation and the like, and is used for measuring the power consumption of each related unit commonly used electric energy meter by adopting the mode, so that the power consumption measuring circuit module is widely used for measuring the power consumption of the current equipment. The DSP digital signal processor in the power consumption measuring circuit module of the electric equipment carries out digital sampling through the A/D converter, and voltage and current effective values, active power and reactive power values can be obtained after a series of mathematical operations are carried out. However, the power consumption measurement circuit module of the conventional electric equipment still has inconvenience in practical application of metering laboratories and field verification.
On the one hand, the integrated design structure has simple cost-saving circuit, but the actual condition that the power consumption can be measured by disassembling the wires on site is caused, and the accuracy of the voltage unit and the current input unit cannot be independently corrected, namely the uncertainty of each circuit unit cannot be independently determined. When the instrument is detected, the whole machine is calibrated by a method without convenient interface connection and traceable correction, and only the error range of the module can be given. The accuracy and stability of the power consumption measuring circuit module of the electric equipment are higher, and the accuracy level of the power consumption measuring circuit module of the electric equipment is limited, so that the higher accuracy level is difficult to give.
On the other hand, the integrated design structure of the power consumption measuring circuit module of the existing electric equipment leads to the stricter requirement on the environmental conditions, and the power consumption measuring circuit module can be normally used only by being attached to a verification device, cannot be carried in a portable mode, and is not suitable for being used as a daily working instrument in a basic unit. And the maximum power consumption of the electric energy meter in the actual power state cannot be determined.
In addition, the traditional equipment can only record the power consumption of the single-phase electric energy meter once, cannot accurately judge the real situation of the electric energy meter, cannot realize continuous recording of the acquisition signals in a period of time, and therefore cannot provide an accurate judgment basis for verification of the single-phase electric energy meter.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a miniature multifunctional power consumption tester, which can be flexibly and conveniently combined in a laboratory and a field environment by carrying out structural design on connection of internal circuit units of the miniature multifunctional power consumption tester; the tester can be used alone or in combination, and meanwhile, the test record data can be continuously and uninterruptedly transmitted to the mobile equipment through the wireless communication module, so that a user can observe and record the test condition conveniently.
In order to solve the technical problems, the embodiment of the invention provides a miniature multifunctional power consumption tester which comprises a 220V input socket of a commercial power, a 220V output socket of the commercial power, a current clamp interface, a voltage clamp interface, a control switch, a current transformer, a voltage signal acquisition module, a current signal acquisition module, a DSP signal operation module, an ARM control module, a high-precision crystal oscillator, a 485 communication module and a wireless communication module;
the mains supply 220V input socket is connected to a CT1 current transformer and a control switch K1 through a safety F1, the CT1 current transformer is connected with a load resistor R1 in parallel for the second time, and the CT1 current transformer is connected to the mains supply 220V output socket after sampling current;
the current clamp interface is connected to a control switch K2 after being connected with a resistor R2 in parallel through a terminal of a No. 2 interface, and the control switch K2 is used for selecting whether to collect current signals through the CT1 current transformer or collect current signals through the current clamp outside;
the voltage clamp interface is connected to a control switch K3 through a terminal of a No. 3 interface, and the control switch K3 selects whether to collect voltage signals internally or collect voltage signals through the voltage clamp externally;
the input ends of the voltage signal acquisition module and the current signal acquisition module are respectively and correspondingly connected with the control switch K4, the output ends of the voltage signal acquisition module and the current signal acquisition module are connected with the input end of the DSP signal operation module, and the output end of the DSP signal operation module is connected with the input end of the ARM control module;
the output end of the high-precision crystal oscillator is respectively connected with the input end of the DSP signal operation module and the input end of the ARM control module;
the output end of the ARM control module is connected with the input end of the 485 communication module;
the output end of the ARM control module is connected with the input end of the wireless communication module.
The utility power 220V input socket and the utility power 220V output socket are convenient to connect in series to detect electric equipment.
The utility power 220V input socket and the utility power 220V output socket are integrated with circuit connection, and the miniaturized tester is easy to move and test.
And the ARM control module records the acquisition signals and sends the acquisition signals to the mobile equipment through the wireless communication module.
The high-precision crystal oscillator provides an accurate clock signal.
Preferably, the ARM control module adopts an M4 series chip.
The wireless communication module adopts a GPRS module of which the model is SI800C Internet of things.
Preferably, the voltage signal acquisition module adopts an AD acquisition chip with the model of AD 4011.
Preferably, the current signal acquisition module adopts an AD acquisition chip with the model of AD 4011.
Preferably, the model TMS320C64x is adopted by the DSP signal operation module.
According to the miniature multifunctional power consumption tester provided by the invention, through structural design on connection of the internal circuit units of the miniature multifunctional power consumption tester, the tester can be flexibly and conveniently combined in a laboratory and a field environment; the voltage measurement circuit unit and the current measurement circuit unit can be independently calibrated and verified, and the calibration precision is high; meanwhile, the tester can be conveniently connected with the electric equipment in series to carry out power detection, and can also conveniently carry out power measurement on the gateway electric energy meter and the large-user electric energy meter without being attached to a special calibrating device under the condition of not disassembling a user line; the tester can be used alone or in combination, and meanwhile, the test record data can be continuously and uninterruptedly transmitted to the mobile equipment through the wireless communication module, so that a user can observe and record the test condition conveniently.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic circuit diagram of a miniature multifunctional power consumption tester.
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.
Examples
Referring to fig. 1, fig. 1 is a schematic structural diagram of a micro multifunctional power consumption tester.
As shown in FIG. 1, the miniature multifunctional power consumption tester comprises a 220V input socket of a mains supply, a 220V output socket of the mains supply, a current clamp interface, a voltage clamp interface, a control switch, a current transformer, a voltage signal acquisition module 102, a current signal acquisition module 101, a DSP signal operation module 103, an ARM control module 105, a high-precision crystal oscillator 104, a 485 communication module 107 and a wireless communication module 106;
the utility power 220V input socket is connected to a CT1 current transformer and a control switch K1 through a safety F1, the CT1 current transformer is connected with a load resistor R1 in parallel for the second time, and the CT1 current transformer is connected to the utility power 220V output socket after sampling current to provide a power supply and a power test platform for tested equipment;
the current clamp interface is connected to a control switch K2 after being connected with a resistor R2 in parallel through a terminal of a No. 2 interface, and the control switch K2 is used for selecting whether to collect current signals through the CT1 current transformer or collect current signals through the current clamp outside;
the voltage clamp interface is connected to the control switch K3 through a terminal of the interface No. 3, and the control switch K3 selects whether to collect voltage signals internally or collect voltage signals through the external voltage clamp;
the input ends of the voltage signal acquisition module 102 and the current signal acquisition module 101 are respectively and correspondingly connected with the control switch K4, the output ends of the voltage signal acquisition module 102 and the current signal acquisition module 101 are connected with the input end of the DSP signal operation module 103, and the output end of the DSP signal operation module 103 is connected with the input end of the ARM control module 105;
the output end of the high-precision crystal oscillator 104 is respectively connected with the input end of the DSP signal operation module 103 and the input end of the ARM control module 105;
the output end of the ARM control module 105 is connected with the input end of the 485 communication module 107;
the output end of the ARM control module 105 is connected with the input end of the wireless communication module 106.
The utility power 220V input socket and the utility power 220V output socket are convenient to connect in series to detect electric equipment.
The utility power 220V input socket and the utility power 220V output socket are integrated with circuit connection, and the miniaturized tester is easy to move and test.
The ARM control module 105 records the acquisition signals and sends the acquisition signals to the mobile device through the wireless communication module 106.
The high precision crystal 104 provides an accurate clock signal.
Preferably, the ARM control module adopts an M4 series chip, and the model is STM32F407.
Preferably, the voltage signal acquisition module 102 adopts an AD acquisition chip with a model AD 4011.
Preferably, the current signal acquisition module 101 adopts an AD acquisition chip with a model AD 4011.
Preferably, the DSP signal operation module 103 adopts a model TMS320C64x.
The 220V commercial power input socket is preferably a three-core national standard.
The 220V output socket of the commercial power is preferably a national standard socket.
The current transformer is preferably custom 100:0.1 high-precision 0.05-level current transformer.
The voltage transformer is preferably a custom-made high-precision 0.01-level voltage transformer.
The wireless communication module 106 is preferably a GPRS module of the SI800C Internet of things.
The output end of the 485 communication module 107 is connected with an electric energy meter 485 interface.
The miniature multifunctional power consumption tester can be applied to power tests of resident electric equipment and industrial electric equipment. The detection of the electric equipment can be directly observed by a user under the condition of not disconnecting the wire, and the detection is convenient and quick. Providing voltage, current effective value, active power, voltage frequency measurements; the wireless communication module 106 is adopted, so that the power consumption data can be continuously and remotely transmitted to the mobile equipment in real time, the power and the electric energy can be comprehensively analyzed, visual data reference is provided for the power consumption condition evaluation of a user, the wireless communication module is suitable for continuous observation and detection under the condition of severe field detection environment, and due to the fact that the wireless communication module 107 is adopted, the power consumption load can be predicted to be matched with the corresponding detection state under the condition of information interaction with the electric energy meter, and the detection data can be recorded more accurately.
The working principle of the miniature multifunctional power consumption tester is as follows: and firstly, connecting electric equipment with the miniature multifunctional power consumption tester. And secondly, controlling the miniature multifunctional power consumption tester by using the mobile equipment according to the wireless communication path of the miniature multifunctional power consumption tester by an operator, and inputting test parameters. Third, the ARM control module 105 of the miniature multifunctional power consumption tester is connected to the DSP signal budget module through a data line according to the set parameters of an operator. And fourthly, the ARM control module 105 transmits signals to the 485 communication module 107 through a connecting wire, and the output end of the 485 interface of the electric energy meter is connected with the signal transmission module to the electric energy meter. And fifthly, a voltage signal acquisition module 102 and a current signal acquisition module 101 acquire information of the voltage U1, the current I1 and the phase phi U through sampling connecting lines. In the sixth step, the DSP signal operation module 103 calculates the active and reactive power consumption of the electric device according to the formulas p=u·i·cos Φ and q=u·i·sin Φ, and uploads the power consumption data to the ARM control module 105 through the connection line. And seventhly, the ARM control module 105 is connected to the wireless communication module 106 through a wire, the ARM control module 105 continuously records online test data, and the test data is continuously and uninterruptedly sent to the mobile equipment in a wireless data transmission mode.
The invention has the following advantages:
(1) The utility power 220V input socket and the utility power 220V output socket are adopted, so that a user can directly connect in series with electric equipment, and the test can be performed without dismantling a circuit.
(2) The control switch, the voltage clamp interface and the current clamp interface are adopted to realize internal or external signal acquisition, so that the device is suitable for different user application scenes, namely the K1 control switch in FIG. 1. The external power consumption test clamp interface provides a convenient interface for on-line monitoring of power consumption of electric equipment running on line on site.
(3) The voltage and the current are respectively and independently collected, the mutual interference of the voltage and the current loops is avoided, and an independent DSP operation module is adopted for comprehensive operation.
(4) The input and output are connected in series so as to be convenient for introducing metering verification, the 220V input socket (1) of the mains supply inputs current, the 220V output socket (6) of the mains supply outputs current, and the 220V input socket (1) of the mains supply can measure the accuracy of a voltage-current loop by injecting standard voltage; the electric parameters of the two loops can be obtained through independent transmission of the wireless module, so that the voltage and current circuit units can be independently calibrated and verified and used.
(5) The 485 communication module 107 is provided, so that the power consumption condition of the test record in the communication state, including the maximum value, the minimum value and the average power value, of the optimal test state can be configured under the power state of the power consumption equipment.
(6) The method is characterized in that a signal acquisition mode is continuously recorded, the power consumption condition of the electric equipment is continuously and uninterruptedly measured within a period of time, and data records such as the maximum value, the minimum value and the average value of the power consumption are recorded in a data table mode, so that an accurate judgment basis is provided for verification of the electric equipment.
(7) The invention has miniaturized volume design, and all circuit modules are integrated in one socket, thereby being convenient for users to carry and use.
(8) The wireless communication module 106 continuously and uninterruptedly remotely transmits the test record data to the mobile device, so that a user can observe and record the test condition, and particularly observe the severe environment condition on site.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be implemented by a program to instruct related hardware, the program may be stored in a computer readable storage medium, and the storage medium may include: read Only Memory (ROM), random access Memory (RAM, random Access Memory), magnetic or optical disk, and the like.
In addition, the foregoing describes in detail a micro multifunctional power consumption tester provided by the embodiment of the present invention, and specific examples should be adopted herein to illustrate the principles and embodiments of the present invention, where the foregoing examples are only for helping to understand the method and core ideas of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (10)
1. The miniature multifunctional power consumption tester is characterized by comprising a 220V mains supply input socket, a 220V mains supply output socket, a current clamp interface, a voltage clamp interface, a control switch, a current transformer, a voltage signal acquisition module, a current signal acquisition module, a DSP signal operation module, an ARM control module, a high-precision crystal oscillator, a 485 communication module and a wireless communication module;
the mains supply 220V input socket is connected to a CT1 current transformer and a control switch K1 through a safety F1, the CT1 current transformer is connected with a load resistor R1 in parallel for the second time, and the CT1 current transformer is connected to the mains supply 220V output socket after sampling current;
the current clamp interface is connected to a control switch K2 after being connected with a resistor R2 in parallel through a terminal of a No. 2 interface, and the control switch K2 is used for selecting whether to collect current signals through the CT1 current transformer or collect current signals through the current clamp outside;
the voltage clamp interface is connected to a control switch K3 through a terminal of a No. 3 interface, and the control switch K3 selects whether to collect voltage signals internally or collect voltage signals through the voltage clamp externally;
the input ends of the voltage signal acquisition module and the current signal acquisition module are respectively and correspondingly connected with the control switch K4, the output ends of the voltage signal acquisition module and the current signal acquisition module are connected with the input end of the DSP signal operation module, and the output end of the DSP signal operation module is connected with the input end of the ARM control module;
the output end of the high-precision crystal oscillator is respectively connected with the input end of the DSP signal operation module and the input end of the ARM control module;
the output end of the ARM control module is connected with the input end of the 485 communication module;
and the output end of the ARM control module is connected with the input end of the wireless communication module.
2. The miniature multifunctional power consumption tester according to claim 1, wherein the 220V input socket and the 220V output socket are convenient for series connection detection of electric equipment.
3. The miniature multifunctional power consumption tester according to claim 1, wherein the 220V mains input socket and the 220V mains output socket are integrated with circuit connection, and the miniature tester is easy to test in a mobile mode.
4. The miniature multifunctional power consumption tester according to claim 1, wherein the ARM control module records the acquisition signal and transmits the acquisition signal to the mobile device through the wireless communication module.
5. The miniature multi-functional power consumption tester according to claim 1, wherein said high precision crystal oscillator provides an accurate clock signal.
6. The miniature multifunctional power consumption tester according to claim 1, wherein the ARM control module employs M4 series chips.
7. The miniature multifunctional power consumption tester according to claim 1, wherein the wireless communication module is a GPRS module of the type SI800C Internet of things.
8. The miniature multifunctional power consumption tester according to claim 1, wherein the voltage signal acquisition module adopts an AD acquisition chip with the model number of AD 4011.
9. The miniature multifunctional power consumption tester according to claim 1, wherein the current signal acquisition module adopts an AD acquisition chip with the model number of AD 4011.
10. The miniature multifunctional power consumption tester according to claim 1, wherein the DSP signal operation module is of model TMS320C64x.
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| CN202011478748.4A CN112630528B (en) | 2020-12-15 | 2020-12-15 | Miniature multifunctional power consumption tester |
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| CN202011478748.4A CN112630528B (en) | 2020-12-15 | 2020-12-15 | Miniature multifunctional power consumption tester |
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| CN112630528B true CN112630528B (en) | 2023-06-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6713997B2 (en) * | 2001-02-09 | 2004-03-30 | Square D Company | Power metering module |
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| TWM348394U (en) * | 2008-07-21 | 2009-01-01 | Shuo-Hang Xu | Outlet device with electric quantity statistics |
| CN202977898U (en) * | 2012-11-21 | 2013-06-05 | 大连职业技术学院 | Power socket capable of measuring power consumption |
| CN205942334U (en) * | 2016-08-09 | 2017-02-08 | 深圳大学 | Consumption detection device and system |
| WO2018028215A1 (en) * | 2016-08-09 | 2018-02-15 | 深圳大学 | Device and system for power consumption detection |
| CN211086576U (en) * | 2018-12-04 | 2020-07-24 | 广西电网有限责任公司南宁供电局 | Power consumption tester for portable single-phase electric energy meter |
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