CN217954718U - Multichannel proportional power source and detection device - Google Patents
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Abstract
The application relates to a multi-channel proportional power source and a detection device. The multichannel proportional power source comprises a communication control module, N signal generation modules and N output interfaces, wherein the communication control module is used for outputting control signals; the N signal generation modules are respectively connected with the communication control module and used for simultaneously outputting a plurality of paths of standard proportional signals when receiving the control signals; the N output interfaces are respectively and correspondingly connected with the N signal generating modules and are used for respectively connecting with external equipment to be tested and outputting a plurality of paths of standard proportional signals to the equipment to be tested; the problem of when traditional power source detected mutual-inductor check gauge, single can only detect a mutual inductance check gauge, detection efficiency is low is solved.
Description
Technical Field
The application belongs to the technical field of instrument calibration, and particularly relates to a multi-channel proportional power source and a detection device.
Background
The power transformer is divided into a voltage transformer and a current transformer, the power transformer needs to be periodically checked according to national metrological checking regulations, and a transformer calibrator is generally adopted to measure errors. Therefore, the accuracy of the transformer calibrator directly influences the calibration result of the transformer. For this reason, in the detailed rules for the implementation of the metering method, the instrument transformer check meter is listed in the list of the instruments to be subjected to the compulsory management, and the instrument transformer check meter must be periodically verified.
The calibration regulation of the current transformer calibrator is definitely written in by adopting an integral calibration method, specifically, an integral calibration device provides two current (or voltage) signals with known amplitude and phase difference, the two current (or voltage) signals are output to two pairs of measurement terminals of the calibrator to be calibrated, and the indication error of the calibrator to be calibrated is the measurement error of the calibrator to be calibrated.
The calibration method generally adopted in China at present directly outputs standard ratio signals by using a power supply with a frequency ratio, and when the calibration method is used for calibrating an electronic calibrator, the calibration method is high in calibration speed, but only one transformer calibrator can be detected at one time, the efficiency is low, and the requirement for batch calibration of produced transformers cannot be met.
SUMMERY OF THE UTILITY MODEL
The application aims to provide a multichannel proportion power source and detection device, and aims to solve the problems that when a traditional power source detection mutual inductor tester is used, only one mutual inductor calibrator can be detected at a single time, and the detection efficiency is low.
A first aspect of an embodiment of the present application provides a multi-channel proportional power source, including: the communication control module is used for outputting a control signal; the N signal generation modules are respectively connected with the communication control module and used for simultaneously outputting a plurality of paths of standard proportional signals when receiving the control signals; the N output interfaces are correspondingly connected with the N signal generating modules respectively and are used for being connected with external equipment to be tested respectively and outputting a plurality of paths of standard proportional signals to the equipment to be tested; and N is more than or equal to 2 and is an integer, and one of the N signal generation modules is configured to send a synchronous time tick signal to the rest of the signal generation modules when receiving the control signal so as to enable the initial phases of the multi-path standard proportional signals to be consistent.
In one embodiment, the apparatus further includes N amplification modules, where the N amplification modules are respectively connected between the N signal generation modules and the N output interfaces in a one-to-one correspondence manner, and the amplification module is configured to amplify the standard proportional signal output by the signal generation module.
In one embodiment, the signal generation module includes a processor and a digital-to-analog conversion unit; the output port of the processor is connected with the input end of the digital-to-analog conversion unit, the processor also receives the control signal through a communication port, and the output end of the digital-to-analog conversion unit is used for outputting the standard proportional signal; the processor is used for outputting a digital waveform signal when receiving the control signal, and the digital-to-analog conversion unit is used for converting the digital waveform signal into the standard proportional signal.
In one embodiment, the digital-to-analog conversion unit includes a first digital-to-analog converter and a second digital-to-analog converter; a first port of the processor is connected with an input end of the first digital-to-analog converter, a second port of the processor is connected with an input end of the second digital-to-analog converter, and the processor also receives the control signal and the synchronous time tick signal through a communication port; the output end of the first digital-to-analog converter and the output end of the second digital-to-analog converter are used for outputting the standard proportional signal.
In one embodiment, the signal generating module further includes a storage unit, and the storage unit is connected to the processor and is configured to store data of the digital waveform signal.
In one embodiment, the amplifying module includes a first power amplifying unit and a second power amplifying unit with the same structure; the input end of the first power amplification unit and the input end of the second power amplification unit are respectively connected with the signal generation module, and the output end of the first power amplification unit and the output end of the second power amplification unit are connected with the output interface and used for amplifying the standard proportional signal output by the signal generation module and outputting the standard proportional signal through the output interface.
In one embodiment, the first power amplifying unit includes an amplifier, a first transistor, a second transistor, a first top resistor, a second top resistor, a first bottom resistor, and a second bottom resistor; the input end of the amplifier is connected with the signal generation module, and the output end of the amplifier is connected with the output interface; the first end of the first transistor is connected with a positive power supply, the second end of the first transistor is connected with a positive power supply end of the amplifier, the first end of the second transistor is connected with a negative power supply, and the second end of the second transistor is connected with a negative power supply end of the amplifier; first top resistance is connected between the first end of first transistor with the control end of first transistor, second top resistance is connected between the first end of second transistor with the control end of second transistor, first bottom resistance is connected the control end of first transistor with between the output of amplifier, second bottom resistance is connected the control end of second transistor with between the output of amplifier.
In an embodiment, the amplifying module further includes a first spreading unit and a second spreading unit having the same structure; the input end of the first current expansion unit is connected with the output end of the first power amplification unit, the input end of the second current expansion unit is connected with the output end of the second power amplification unit, the output end of the first current expansion unit and the output end of the second current expansion unit are connected with the output interface, and the first current expansion unit and the second current expansion unit are used for current expansion to improve the power of the standard proportion signal.
In one embodiment, each of the standard proportion signals includes a first electrical signal and a second electrical signal, and the amplitudes and the phase differences of the first electrical signal and the second electrical signal are adjustable.
A second aspect of the embodiments of the present application provides a detection apparatus, including the multichannel proportional power source provided in the first aspect of the embodiments of the present application, where an output interface of the multichannel proportional power source is used to connect with a measurement terminal of the calibration instrument transformer.
Compared with the prior art, the embodiment of the application has the advantages that: through setting up a plurality of signal generation modules, can independently generate multichannel standard proportion signal respectively, export to the equipment that awaits measuring through output interface, realize treating the check-up of equipment that awaits measuring, communication control module outputs a control signal and gives a plurality of signal generation modules 1, controls a plurality of signal generation modules and exports multichannel standard proportion signal simultaneously, realizes the check-up to a plurality of outside equipment that awaits measuring.
And one of the signal generating modules is configured to send a synchronous time tick signal to the other signal generating modules when receiving the control signal, so as to ensure that the initial phases of the output multi-path standard proportional signals are consistent, and thus, the phase between the final multi-path standard proportional signals has a common reference.
Drawings
FIG. 1 is a schematic diagram of a multi-channel proportional power source according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a multi-channel proportional power source according to another embodiment of the present application;
fig. 3 is a schematic diagram of a signal generating module and an amplifying module according to an embodiment of the present disclosure;
fig. 4 is a schematic circuit diagram of a first power amplifying unit according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of a detection apparatus according to an embodiment of the present application;
the drawings described above illustrate: 100. a signal generation module; 200. an output interface; 300. a communication control module; 400. an amplifying module; 500. a detection device; 600. a mutual inductor calibrator; 110. a processor; 120. a digital-to-analog conversion unit; 130. a storage unit; 140. a communication port; 410. a first power amplifying unit; 420. a second power amplifying unit; 430. a first stream expansion unit; 440. and a second flow expansion unit.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, 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 merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" 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 will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings to facilitate the description of the application and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be constructed in operation as a limitation of the application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
A first embodiment of the present application provides a multi-channel proportional power source, as shown in fig. 1, the multi-channel proportional power source includes N signal generating modules 100, N output interfaces 200, and a communication control module 300, where the communication control module 300 is configured to output a control signal, and the N signal generating modules 100 are respectively connected to the communication control module 300 and configured to output multiple paths of standard proportional signals simultaneously when receiving the control signal. The standard proportional signal here comprises two voltage/current signals. The N output interfaces 200 are respectively and correspondingly connected with the N signal generating modules 100, and the N output interfaces 200 are respectively used for being connected with external equipment to be tested and outputting a plurality of paths of standard proportional signals to the equipment to be tested. Wherein N is greater than or equal to 2 and is an integer, and one of the N signal generating modules 100 is configured to send a synchronous time tick signal to the remaining signal generating modules 100 when receiving the control signal, so that the initial phases of the multiple paths of standard proportional signals are consistent.
The multi-channel standard proportional source provided by the first aspect of this embodiment can independently generate a plurality of standard proportional signals respectively by setting the plurality of signal generating modules 100, and output the signals to the device to be tested through the output interface 200 to verify the device to be tested, and the communication control module 300 outputs a control signal to the plurality of signal generating modules 100 to control the plurality of signal generating modules 100 to simultaneously output the plurality of standard proportional signals, thereby verifying a plurality of external devices to be tested.
And, one of the signal generating modules 100 is configured to send a synchronous time tick signal to the remaining signal generating modules 100 when receiving the control signal, so as to ensure that the initial phases of the output multi-path standard proportional signals are consistent, so as to realize that the phase between the final multi-path standard proportional signals has a common reference.
In one embodiment, the communication control module 300 includes an RS232 serial communication server, and the RS232 serial communication server is used to output control signals to the plurality of signal generating modules 100, so that the N signal generating modules 100 can simultaneously output multiple paths of standard proportional signals.
Referring to fig. 2, in an embodiment, the multi-channel standard ratio source further includes N amplifying modules 400, the N amplifying modules 400 are respectively connected between the N signal generating modules 100 and the N output interfaces 200 in a one-to-one correspondence manner, the amplifying module 400 is configured to amplify the standard ratio signal output by the signal generating module 100, and the amplifying module 400 is capable of amplifying the power of the standard ratio signal, so as to increase the output power range of the multi-channel standard ratio source.
Referring to fig. 2 and 3, in one embodiment, the signal generating module 100 includes a processor 110 and a digital-to-analog conversion unit 120. The output port of the processor 110 is connected to the input end of the digital-to-analog conversion unit 120, the processor 110 further receives the control signal through the communication port 140, and the output end of the digital-to-analog conversion unit 120 is used for outputting the standard proportional signal. It will be appreciated that the processor 110 receives control signals via the communication port 140 and also receives synchronization pair signals via the communication port 140. If the signal generation module 100 is configured to send the synchronous time tick signal to the remaining signal generation modules 100 when receiving the control signal, the processor 110 of the signal generation module 100 also sends the synchronous time tick signal to the remaining signal generation modules 100 through the communication port 140.
Specifically, the processor 110 is configured to output a digital waveform signal when receiving the control signal, and the digital-to-analog conversion unit 120 is configured to convert the digital waveform signal into a standard ratio signal and output the standard ratio signal. The processor 110 and the digital-to-analog conversion unit 120 adopt a Serial Peripheral Interface (SPI) communication mode.
Referring to fig. 2 and 3, further, in an embodiment, the digital-to-analog converting unit 120 includes a first digital-to-analog converter DAC1 and a second digital-to-analog converter DAC2.
The first port SPI1 of the processor 110 is connected to an input terminal of the first digital-to-analog converter DAC1, the second port SPI2 of the processor 110 is connected to an input terminal of the second digital-to-analog converter DAC2, and the processor 110 further receives the control signal and the synchronization time tick signal through the communication port 140. The output of the first digital-to-analog converter DAC1 and the output of the second digital-to-analog converter DAC2 are used to output a standard proportional signal to the output interface 200.
In one embodiment, the processor 110 employs an embedded processor with a core rate up to 500M and outputs the output standard ratio signal through the high speed SPI interface. The multiple SPI interfaces of the multiple signal generating modules 100 start outputting synchronously, and the angular difference between the multiple standard proportional signals that are output can be made as small as possible.
Referring to fig. 3, in a further embodiment, the signal generating module 100 further includes a storage unit 130, the storage unit 130 is connected to the processor 110, the storage unit 130 is configured to store Data of the digital waveform signal, and in some embodiments, the storage unit 130 includes a Double Data Rate SDRAM (DDR) and a FLASH memory (FLASH), where the DDR is configured to store a large amount of Data of the digital waveform signal, the Data of the digital waveform signal is selectively read as needed and output through the multi-channel high-speed SPI interface, and the FLASH memory is used for general storage for reading and writing of Data generated during the operation of the processor 110. A large amount of data of digital waveform signals are stored through DDR, the output requirements of signals with different standard proportions are met, and the practicability of the multichannel standard proportion source is improved.
Referring to fig. 2 and 3, in an embodiment, the amplifying module 400 includes a first power amplifying unit 410 and a second power amplifying unit 420 having the same structure, and are configured to amplify two voltage/current signals of each quasi-proportional signal. The input end of the first power amplifying unit 410 and the input end of the second power amplifying unit 420 are respectively connected to the signal generating module 100, and the output end of the first power amplifying unit 410 and the output end 420 of the second power amplifying unit are connected to the output interface 200, and are configured to amplify the standard proportional signal output by the signal generating module 100 and output the signal through the output interface 200.
Referring to fig. 4, in particular, in one embodiment, the first power amplifying unit 410 includes an amplifier U1, a first transistor Q1, a second transistor Q2, a first top resistor RT1, a second top resistor RT2, a first bottom resistor RB1, and a second bottom resistor RB2.
An input end VIN of an amplifier U1 is connected with a signal generation module 100 through a current-limiting resistor R1, an output end VOUT of the amplifier U1 is connected with an output interface 200, a first end of a first transistor Q1 is connected with a positive power supply + VS, a second end of the first transistor Q1 is connected with a positive power supply VCC of the amplifier U1, a first end of a second transistor Q2 is connected with a negative power supply-VS, and a second end of the second transistor Q2 is connected with a negative power supply VEE of the amplifier U1. The first top resistor RT1 is connected between the first terminal of the first transistor Q1 and the control terminal of the first transistor Q1, the second top resistor RT2 is connected between the first terminal of the second transistor Q2 and the control terminal of the second transistor Q2, the first bottom resistor RB1 is connected between the control terminal of the first transistor Q1 and the output terminal of the amplifier U1, and the second bottom resistor RB2 is connected between the control terminal of the second transistor Q2 and the output terminal of the amplifier U1. The resistor R3 is connected between the negative input terminal and the output terminal of the amplifier U1 as a feedback resistor. The first top resistor RT1, the second top resistor RT2, the first bottom resistor RB1 and the second bottom resistor RB2 form a resistive bias network, and the resistive bias network and a pair of complementary discrete transistors, namely the first transistor Q1 and the second transistor Q2, form a power supply bootstrap circuit together.
The multi-channel standard proportional source of the embodiment needs to output a high-precision voltage signal with the precision reaching 0.02 level and the stability reaching 0.003%, so that a digital power amplifier cannot meet index requirements due to inherent noise and distortion, only an analog power amplifier U1 is adopted, a power supply of the ready-made integrated analog power amplifier U1 is generally within +/-100V, for an alternating-current voltage of 120V to be output, the output peak value reaches 169.7V, in addition, the voltage drop of a transistor is 6V, the working power supply of the amplifier U1 can be guaranteed to output a required target voltage within +/-180V, and therefore, the purpose of expanding the power supply range of the amplifier U1 is achieved by arranging the power supply bootstrap circuit.
Referring to fig. 3, in a further embodiment, the amplifying module 400 further includes a first spreading unit 430 and a second spreading unit 440 having the same structure. The input end of the first current spreading unit 430 is connected to the output end of the first power amplifying unit 410, the input end of the second current spreading unit 440 is connected to the output end of the second power amplifying unit 420, the output ends of the first current spreading unit 430 and the second current spreading unit 440 are connected to the output interface 200, and the first current spreading unit 430 and the second current spreading unit 440 are configured to spread current to increase the power of the standard proportional signal, so as to meet the output power requirement of the multi-channel proportional power source.
In some embodiments, the first current spreading unit 430 and the second current spreading unit 440 are implemented by a voltage regulator and a current spreading device, and the current spreading device is connected in parallel with the voltage regulator to implement voltage stabilization and current spreading for the standard proportional signals output by the first power amplifying unit 410 and the second power amplifying unit 420.
In one embodiment, it is easy to understand that each of the quasi-proportional signals output by the multi-channel proportional power source of the embodiment of the present application includes a first electrical signal and a second electrical signal, and the voltage amplitudes of the first electrical signal and the second electrical signal and the phase difference between the first electrical signal and the second electrical signal are adjustable and set as required.
The multi-channel standard proportional source provided by the first aspect of this embodiment can independently generate a plurality of standard proportional signals respectively by setting the plurality of signal generating modules 100, and output the signals to the device to be tested through the output interface 200 to check the device to be tested, and the communication control module 300 outputs a control signal to the plurality of signal generating modules 100 to control the plurality of signal generating modules 100 to output the plurality of standard proportional signals at the same time, thereby checking the plurality of external devices to be tested.
And, one of the signal generating modules 100 is configured to send a synchronous time tick signal to the remaining signal generating modules 100 when receiving the control signal, so as to ensure that the initial phases of the output multi-path standard proportional signals are consistent, so as to realize that the phase between the final multi-path standard proportional signals has a common reference.
Referring to fig. 1 and 5, a second aspect of the embodiments of the present application provides a detection apparatus 500 for verifying a transformer calibrator 600. The multi-channel proportional power source provided by the first aspect of the embodiment of the application is included. The output interfaces 200 of the multichannel proportional power source are used for being connected with the measurement terminals of the calibration transformer calibrator 600, and the indication error of the calibrated transformer calibrator 600 is the measurement error thereof.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. For the specific working processes of the units and modules in the system, reference may be made to the corresponding processes in the foregoing method embodiments, which are not described herein again.
In the above embodiments, the description of each embodiment has its own emphasis, and reference may be made to the related description of other embodiments for parts that are not described or recited in any embodiment.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present application, and they should be construed as being included in the present application.
Claims (10)
1. A multi-channel proportional power source, comprising:
the communication control module is used for outputting a control signal;
the N signal generation modules are respectively connected with the communication control module and used for simultaneously outputting a plurality of paths of standard proportional signals when receiving the control signals;
the N output interfaces are correspondingly connected with the N signal generating modules respectively and are used for being connected with external equipment to be tested respectively and outputting a plurality of paths of standard proportional signals to the equipment to be tested;
and N is more than or equal to 2 and is an integer, and one of the N signal generation modules is configured to send a synchronous time tick signal to the rest of the signal generation modules when receiving the control signal so as to enable the initial phases of the multi-path standard proportional signals to be consistent.
2. The multi-channel proportional power source of claim 1, further comprising N amplification modules, wherein the N amplification modules are respectively connected between the N signal generation modules and the N output interfaces in a one-to-one correspondence, and the amplification modules are configured to amplify the standard proportional signals output by the signal generation modules.
3. The multi-channel proportional power source of claim 1, wherein the signal generation module comprises a processor and a digital-to-analog conversion unit;
the output port of the processor is connected with the input end of the digital-to-analog conversion unit, the processor also receives the control signal through a communication port, and the output end of the digital-to-analog conversion unit is used for outputting the standard proportional signal;
the processor is used for outputting a digital waveform signal when receiving the control signal, and the digital-to-analog conversion unit is used for converting the digital waveform signal into the standard proportional signal.
4. The multi-channel proportional power source of claim 3, wherein the digital-to-analog conversion unit comprises a first digital-to-analog converter and a second digital-to-analog converter;
a first port of the processor is connected with an input end of the first digital-to-analog converter, a second port of the processor is connected with an input end of the second digital-to-analog converter, and the processor also receives the control signal and the synchronous time tick signal through a communication port; the output end of the first digital-to-analog converter and the output end of the second digital-to-analog converter are used for outputting the standard proportional signal.
5. The multi-channel proportional power source of claim 3, wherein the signal generation module further comprises a memory unit coupled to the processor for storing data of the digital waveform signal.
6. The multi-channel proportional power source of claim 2, wherein the amplification module comprises a first power amplification unit and a second power amplification unit that are structurally identical;
the input end of the first power amplification unit and the input end of the second power amplification unit are respectively connected with the signal generation module, and the output end of the first power amplification unit and the output end of the second power amplification unit are connected with the output interface and used for amplifying the standard proportional signal output by the signal generation module and outputting the standard proportional signal through the output interface.
7. The multi-channel proportional power source of claim 6, wherein the first power amplifying unit comprises an amplifier, a first transistor, a second transistor, a first top resistor, a second top resistor, a first bottom resistor, and a second bottom resistor;
the input end of the amplifier is connected with the signal generation module, and the output end of the amplifier is connected with the output interface; the first end of the first transistor is connected with a positive power supply, the second end of the first transistor is connected with a positive power supply end of the amplifier, the first end of the second transistor is connected with a negative power supply, and the second end of the second transistor is connected with a negative power supply end of the amplifier; the first top resistor is connected between the first end of the first transistor and the control end of the first transistor, the second top resistor is connected between the first end of the second transistor and the control end of the second transistor, the first bottom resistor is connected between the control end of the first transistor and the output end of the amplifier, and the second bottom resistor is connected between the control end of the second transistor and the output end of the amplifier.
8. The multi-channel proportional power source of claim 7, wherein the amplifying module further comprises a first current spreading element and a second current spreading element having the same structure;
the input end of the first current expansion unit is connected with the output end of the first power amplification unit, the input end of the second current expansion unit is connected with the output end of the second power amplification unit, the output end of the first current expansion unit and the output end of the second current expansion unit are connected with the output interface, and the first current expansion unit and the second current expansion unit are used for current expansion to improve the power of the standard proportion signal.
9. The multi-channel proportional power source of any of claims 1-8, wherein each of the standard proportional signals comprises a first electrical signal and a second electrical signal, the first electrical signal and the second electrical signal being adjustable in amplitude and phase difference.
10. A testing apparatus for a calibration transformer calibrator comprising a multichannel proportional power source as claimed in any one of claims 1 to 9, an output interface of the multichannel proportional power source being adapted to be connected to a measurement terminal of the calibration transformer calibrator.
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Denomination of utility model: Multi channel proportional power source and detection device Effective date of registration: 20231007 Granted publication date: 20221202 Pledgee: Shenzhen SME financing Company limited by guarantee Pledgor: SHENZHEN CITY STAR DRAGON TECHNOLOGY Co.,Ltd. Registration number: Y2023980059951 |