CN209841927U - Meter source integrated synchronous dynamic distortion power source with trigger - Google Patents
Meter source integrated synchronous dynamic distortion power source with trigger Download PDFInfo
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- CN209841927U CN209841927U CN201920298307.2U CN201920298307U CN209841927U CN 209841927 U CN209841927 U CN 209841927U CN 201920298307 U CN201920298307 U CN 201920298307U CN 209841927 U CN209841927 U CN 209841927U
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Abstract
The utility model discloses an integrative synchronous dynamic distortion power source in table source that area triggered relates to electricity and measures instrument and meter technical field, the power source includes signal generator, power amplifier, sampling module and synchronization module, power amplifier's input respectively with signal generator's output is connected, power amplifier's output with sampling module's input is connected, synchronization module's output with signal generator's input is connected, sampling module's output with signal generator's input is connected. The utility model discloses the problem that dynamic distortion signal is difficult to the seizure has been solved effectively to obtain the dynamic distortion signal of reality and the playback of strict synchronization simultaneously, made the user catch and analyze the less signal of time scale, when taking discrete numerical sequence, the waveform sequence that needs the alignment can not stagger, the error analysis that has significantly reduced has improved waveform analysis and signal analysis's exactness.
Description
Technical Field
The utility model relates to an electrical logging instrument and meter technical field, and more specifically relate to an integrative synchronous dynamic distortion power source in table source that area triggered.
Background
With the development of power electronic technology and the application of the power electronic technology in various industries, nonlinear, aperiodic, impact and fluctuating power loads are greatly increased, so that the dynamic distortion load capacity in a power grid is larger and larger, the load of the power grid under the actual operation condition is often not stable, the distortion is larger and larger, the fluctuation rule is not uniform, the test condition of the traditional electric energy meter generally requires a stable power source, the measurement accuracy under the fluctuation load is often not examined, the load under the actual operation condition is often not stable, and the situation can be caused: the electric energy meter is qualified in first inspection in a laboratory, is unqualified in verification after being hung with a net and is qualified after being disassembled and sent to the laboratory for verification. Therefore, the accuracy and the rationality of the electric energy metering device are directly related to the economic benefits of three parties, namely the power generation party, the power supply party and the power utilization party. The accuracy of electric energy metering under the condition of dynamic distortion load is improved, the accuracy is a common requirement of three parties of power generation, power supply and power utilization, and is a concrete embodiment of a scientific, fair and reasonable metering principle under the condition of complex load, so that the non-linear test waveform is required to be added to the test of the electric energy meter according to the relevant industry standard suggestions. Particularly, with the development of intelligent stations, field waveforms have both analog waveforms and digital waveforms, and these digital waveforms have no professional testing instrument, so that the problem of digital nonlinear load testing cannot be solved in the current electric energy industry.
A dynamic distortion source is a device that can generate an arbitrary analog signal for studying or detecting the response of other devices under non-periodic signal excitation. However, in the actual use process, because the signal capturing and analysis with smaller time scale is involved, the current solution is to use the recorder to record the whole process from the signal generation to the signal stop, then to put the generated recording file on the computer to restore, and to judge and intercept the required interval manually. In the process, firstly, more manual participation processes exist, and the efficiency is low. Moreover, the discrete numerical sequence after A/D sampling is stored in the recording file, and when the discrete numerical sequence is judged manually, two waveform sequences needing to be aligned may be staggered by a plurality of sampling points, so that errors are inevitably generated in subsequent analysis.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a not enough to above-mentioned technique, the utility model discloses an integrative synchronous dynamic distortion power source in table source that area triggered can solve the problem that the dynamic distortion signal is difficult to the seizure effectively to obtain the playback of actual dynamic distortion signal and strict synchronization simultaneously, improve information analysis's accuracy nature greatly.
The utility model adopts the following technical scheme:
a watch source integrated synchronous dynamic distortion power source with triggering, the power source comprising:
the signal generator is used for generating a trigger signal with dynamic distortion as the electronic equipment for signal generation and signal excitation;
the power amplifier is used for amplifying the low-power signal so as to meet the requirement of circuit voltage for acquiring a dynamic distortion signal;
the sampling module is used for collecting the trigger signal output by the signal generator;
the synchronization module is used for receiving the trigger signal generated by the signal generator, realizing strict synchronization of the actual output signal of the synchronization module and the received trigger signal and realizing accurate synchronization of the actual output signal of the synchronization module and the signal sampled by the sampling module;
the input ends of the synchronization module and the power amplifier are respectively connected with the output end of the signal generator, the output end of the power amplifier is connected with the input end of the sampling module, the output end of the synchronization module is connected with the input end of the signal generator, and the output end of the sampling module is connected with the input end of the signal generator.
As a further technical scheme of the utility model, signal generator include DSP computational element and with the DA conversion unit that DSP computational element connects, wherein DSP computational element receives the sampling sequence of sampling module input with the trigger signal that synchronous module sent, and will the sampling sequence is accurate to be traded into discrete sequence, DA conversion unit receives discrete sequence to convert received discrete digital signal to continuous analog signal and output.
As a further technical solution of the present invention, the synchronization module includes a clock module with a built-in clock reference, the clock module synchronizes and converts an external trigger signal or a trigger signal provided by the signal generator, and provides a sampling trigger signal for the da conversion unit and the sampling module, so that the da conversion unit and the signal received by the sampling module are strictly synchronized.
As a further technical solution of the present invention, the sampling module includes:
a sensor for sensing the analog continuous signal generated by the signal generator;
the input end of the signal conversion module is connected with the output end of the sensor and is used for converting the signal output by the sensor; and
the input end of the A/D conversion unit is connected with the output end of the signal conversion module and is used for converting the analog signal output by the signal conversion module into a digital signal; and is
The sampling module is used for sampling the analog quantity of the output loop of the power amplifier and transmitting the sampling sequence to the DSP computing unit in the signal generator.
As a further technical scheme of the utility model, power amplifier includes voltage power amplifier and current power amplifier, wherein voltage power amplifier is used for becoming the big voltage signal with little voltage signal, current power amplifier is used for becoming the heavy current signal with little current signal.
As a further technical scheme of the utility model, voltage power amplifier includes first operational amplifier circuit and field effect transistor amplifier circuit, first operational amplifier circuit's output with field effect transistor amplifier circuit's input is connected, first operational amplifier circuit is for the amplifier circuit based on OPA227, field effect transistor amplifier circuit is for the amplifier circuit based on field effect transistor.
As the utility model discloses further technical scheme, voltage power amplifier includes second operational amplifier circuit and triode amplifier circuit, second operational amplifier circuit's output with triode amplifier circuit's input is connected, second operational amplifier circuit is the amplifier circuit based on OPA227, triode amplifier circuit is the amplifier circuit based on the triode.
As a further technical solution of the utility model, the AD converting unit is based on the analog-to-digital conversion circuit of comparison type one by one, and the analog-to-digital conversion circuit contains voltage comparator, control logic circuit, shift register and data register and DA converter, the output of voltage comparator with control logic circuit's input is connected, control logic circuit's output with shift register and data register's input is connected, shift register and data register carry out the digital output, the DA converter to voltage comparator output analog signal.
As a further technical solution of the present invention, the DSP computing unit is a TMS320F28335 type digital signal processor having a 32-bit floating point processing unit.
As a further technical scheme of the utility model, DSP computational element is DSP + FPGA computational element.
Has the positive and beneficial effects that:
the utility model realizes the integration of the meter source by arranging the DSP computing unit and the power amplifier;
the utility model discloses a set up the synchronization module, through the clock module with the clock benchmark of built-in wherein, the clock module synchronizes the external trigger signal or the trigger signal that signal generator provided, and convert the actual output signal of synchronization module, in order with the strict synchronization of the trigger signal received, and then realize the accurate synchronization of the actual output signal of synchronization module with the signal that the sampling module sampled;
the utility model can generate the trigger signal of dynamic distortion by arranging the signal generator;
the utility model discloses can also effectively solve the problem that dynamic distortion signal is difficult to the seizure to obtain the dynamic distortion signal of reality and the playback of strict synchronization simultaneously, can make the user catch and analyze the less signal of time scale, when taking discrete numerical sequence, can not stagger the waveform sequence that needs the alignment, the error analysis that has significantly reduced has improved waveform analysis and signal analysis's exactness.
Drawings
In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive exercise, wherein:
fig. 1 is a schematic diagram of the principle structure of an integrated synchronous dynamic distortion power source with a triggered meter source of the present invention;
fig. 2 is a schematic diagram of a schematic structure of a signal generator in an integrated synchronous dynamic distortion power source with a triggered meter source of the present invention;
fig. 3 is a schematic diagram of the schematic structure of a sampling module in the meter source integrated synchronous dynamic distortion power source with trigger according to the present invention;
fig. 4 is a schematic structural diagram of a voltage power amplifier in an integrated synchronous dynamic distortion power source with a triggered meter source of the present invention;
fig. 5 is a schematic structural diagram of a current power amplifier in an integrated synchronous dynamic distortion power source with a triggered meter source according to the present invention;
FIG. 6 is a schematic circuit diagram of an A/D conversion unit in an integrated synchronous dynamic distortion power source with a triggered meter source according to the present invention;
fig. 7 is a schematic flow chart of a method for implementing the table source integrated synchronous dynamic distortion power source with trigger of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that the embodiments described herein are merely illustrative and explanatory of the present invention, and are not restrictive of the invention.
As shown in fig. 1, a table source integrated synchronous dynamic distortion power source with trigger, the power source includes: signal generator, power amplifier, sampling module and synchronization module, wherein synchronization module, power amplifier's input respectively with signal generator's output is connected, power amplifier's output with sampling module's input is connected, synchronization module's output with signal generator's input is connected, sampling module's output with signal generator's input is connected.
The synchronization module is used for receiving the trigger signal generated by the signal generator, realizing strict synchronization of the actual output signal of the synchronization module and the received trigger signal, and realizing accurate synchronization of the actual output signal of the synchronization module and the sampling signal of the sampling module. In this embodiment, the synchronization module includes a clock module with a built-in clock reference, and the clock module synchronizes and converts an external trigger signal or a trigger signal provided by the signal generator, and provides a sampling trigger signal for the D/a conversion unit and the sampling module, so that signals received by the D/a conversion unit and the sampling module are strictly synchronized.
As shown in fig. 2, the signal generator is used for generating a trigger signal of dynamic distortion as an electronic device for signal generation and signal excitation; signal generators, also known as signal sources or oscillators, are widely used in production practice and in the field of science and technology. Various wave curves can be expressed by trigonometric functions. A circuit capable of generating various waveforms such as a triangular wave, a sawtooth wave, a rectangular wave (including a square wave), and a sine wave is called a function signal generator. The utility model discloses in, signal generator include DSP computational element and with the DA conversion unit that DSP computational element connects, wherein DSP computational element receives the sampling sequence of sampling module input with the trigger signal that synchronization module sent, and will the sampling sequence is accurate to be traded into discrete sequence, DA conversion unit receives discrete sequence to convert received discrete digital signal to continuous analog signal and output.
In the above embodiment, the DSP computing unit is a TMS320F28335 type digital signal processor with 32-bit floating point processing units. TMS320F28335 model digital Signal processor TI corporation's TMS320C28X series floating point DSP controller. Compared with the prior fixed-point DSP, the device has the advantages of high precision, low cost, low power consumption, high performance, high peripheral integration level, large data and program memory capacity, more accurate and faster A/D conversion and the like. TMS320F28335 has high speed processing capability of 150MHz, has 32-bit floating point processing unit, 6 DMA channels supporting ADC, McBSP and EMIF, has up to 18 PWM outputs, 6 of which are higher precision PWM outputs (HRPWM) unique to TI, 12-bit 16-channel ADC. Thanks to the floating point arithmetic unit, a user can quickly write a control algorithm without consuming excessive time and energy on decimal processing operation, the average performance is improved by 50 percent compared with the prior DSP, and the control algorithm is compatible with fixed point C28x controller software, thereby simplifying software development, shortening development period and reducing development cost.
In another embodiment, the DSP computing unit is a DSP + FPGA computing unit, and the DSP computing unit in the above embodiments may be replaced with a DSP + FPGA main control unit for use, and the effect is better, in this embodiment, the DSP + FPGA main control unit includes a DSP chip and an FPGA chip, the DSP chip is connected to the FPGA chip, the FPGA chip is further connected to the D/a conversion unit, the D/a conversion unit converts information output by the FPGA chip into an analog signal for output, the FPGA adopts a fourth generation product EP4C115E of a Cyclone series of the company ATERAL, and a PWM module is formed inside the FPGA to complete generation and expansion of PWM pulses, so as to implement a greater number of PWM pulse paths. The main functions of the FPGA are data storage, digital filtering, access control interrupt transceiving, fault blocking, PWM output and the like. Therefore, the FPGA completes the generation and expansion of the pulse according to the result of the DSP calculation unit so as to realize the generation of the pulse number larger than 12 paths and ensure the high-efficiency work of the power supply.
As shown in fig. 3, the sampling module is configured to collect a trigger signal output by the signal generator; in an embodiment of the present invention, the sampling module includes:
a sensor for sensing the analog continuous signal generated by the signal generator;
the input end of the signal conversion module is connected with the output end of the sensor and is used for converting the signal output by the sensor; and
the input end of the A/D conversion unit is connected with the output end of the signal conversion module and is used for converting the analog signal output by the signal conversion module into a digital signal; and is
The sampling module is used for sampling the analog quantity of the output loop of the power amplifier and transmitting the sampling sequence to the DSP computing unit in the signal generator.
In the above embodiment, referring to fig. 6 more specifically, the a/D conversion unit is an analog-to-digital conversion circuit based on a successive approximation type, and the analog-to-digital conversion circuit includes a voltage comparator, a control logic circuit, a shift register, a data register, and a D/a converter, an output terminal of the voltage comparator is connected to an input terminal of the control logic circuit, an output terminal of the control logic circuit is connected to input terminals of the shift register and the data register, the shift register and the data register perform digital quantity output, and the D/a converter outputs an analog quantity signal to the voltage comparator. In a specific embodiment, the successive approximation type a/D conversion circuit is configured by a comparator and a D/a converter using successive approximation logic, and the input voltage is compared with the built-in D/a converter output for each bit sequentially from the MSB, and a digital value is output through n-time comparisons.
As shown in fig. 4 and 5, the power amplifier is used to amplify a low-power signal to meet the requirement of circuit voltage for acquiring a dynamic distortion signal; in the utility model discloses in, power amplifier includes voltage power amplifier and current power amplifier, wherein voltage power amplifier is used for becoming the big voltage signal with the little voltage signal, current power amplifier is used for becoming the heavy current signal with the little current signal.
Referring to fig. 4 specifically, the voltage power amplifier includes a first operational amplifier circuit and a field-effect transistor amplifier circuit, an output end of the first operational amplifier circuit is connected to an input end of the field-effect transistor amplifier circuit, the first operational amplifier circuit is an amplifier circuit based on OPA227, and the field-effect transistor amplifier circuit is an amplifier circuit based on a field-effect transistor.
In a specific embodiment, after the first-stage amplification is performed by the operational amplifier circuit, the output end of the operational amplifier circuit is connected with the gate of the field-effect tube, the field-effect tube amplifier circuit performs the first-stage amplification on the received information by two field-effect tubes connected in series, and then performs the second-stage amplification by 2 field-effect tubes connected in series, thereby finally realizing the amplification of the input information.
Referring specifically to fig. 5, the voltage power amplifier includes a second operational amplifier circuit and a triode amplifier circuit, an output end of the second operational amplifier circuit is connected to an input end of the triode amplifier circuit, the second operational amplifier circuit is an amplifier circuit based on OPA227, and the triode amplifier circuit is an amplifier circuit based on a triode.
In a specific embodiment, after the first-stage amplification is performed by the operational amplifier circuit, the output end of the operational amplifier circuit is connected with a triode, and the triode amplifier circuit is two triodes connected in parallel. The operational amplifier performs primary amplification on the received information, and performs secondary amplification through 2 triodes, so that the amplification of the input information is finally realized. And one of the selected triodes is an NPN triode, the other one of the selected triodes is a PNP triode, the NPN triode and the PNP triode are connected by a common base electrode, a collector electrode of the NPN triode is connected with the high level voltage of the OPA227 operational amplifier, and an emitter electrode of the PNP triode is connected with the low level voltage of the OPA227 operational amplifier.
In the above embodiment, the operational amplifier OPA227 is adopted as an operational amplifier, which has characteristics of low noise, wide bandwidth, and high precision, and the OPA227 has a stable unit gain and has a high slew rate (2.3V/μ s) and a wide bandwidth (8 MHz).
The utility model discloses a synchronous dynamic distortion power source supports two kinds of mode of operation of internal trigger and external trigger.
In the internal trigger mode, a trigger synchronization signal is provided by the DSP computing unit at the start of triggering, and a discrete digital sequence is simultaneously output to the D/A conversion unit. After receiving the trigger signal provided by the DSP computing unit, the clock module transmits the trigger signal to the outside and simultaneously transmits the sampling trigger signal to the D/A conversion unit and the A/D conversion unit.
In the internal trigger mode, the DSP computing unit cycles waiting for an external trigger signal at the start of the trigger. And after receiving the external trigger signal, the clock module starts to transmit a sampling trigger signal to the D/A conversion unit and the A/D conversion unit and simultaneously forwards the external trigger signal to the DSP calculation unit. And the DSP computing unit starts to output the discrete digital sequence to the D/A conversion unit after receiving the trigger signal.
Referring to fig. 7, a method for improving waveform analysis and signal analysis accuracy in the case of synchronous dynamic distortion, comprising the steps of:
(S1) generating a dynamically distorted trigger signal using a signal generator;
(S2) amplifying the trigger signal generated by the signal generator using the power amplifier to meet the requirement of obtaining the circuit voltage of the dynamic distortion signal;
(S3) acquiring a trigger signal output from the signal generator using a sampling module; in this step, the signal is used as an original signal acquired by the sampling module for the first time;
(S4) acquiring, by using a synchronization module, a trigger signal output by the signal generator, receiving the trigger signal generated by the signal generator, and implementing strict synchronization between an actual output signal of the synchronization module and the received trigger signal, and implementing accurate synchronization between the actual output signal of the synchronization module and a signal sampled by the sampling module;
(S5) the sampling module is applied again to acquire the trigger signal synchronized by the synchronization module; in this step, the signal is used as the original signal acquired by the sampling module for the second time;
(S6) judging whether to perform signal repeated collection, if the signal is repeatedly collected, returning to the step (S3), if the signal is not repeatedly collected, performing the step (S7);
(S7) comparing the signal information acquired twice by the sampling module; in the step, the information of the two modules is compared, so that the signal condition before synchronization and the information condition after synchronization of the synchronization module can be checked, and the stability of the power supply can be measured conveniently;
(S8) drawing a conclusion; and drawing a conclusion on the reliability and stability of the waveform data of the power supply under the condition of the dynamic distortion signal according to the comparison result of the step (S7).
To sum up, the utility model discloses can effectively solve the problem that dynamic distortion signal is difficult to the seizure to obtain the dynamic distortion signal of reality and the playback of strict synchronization simultaneously, can make the user catch and analyze the less signal of time scale, when taking discrete numerical sequence, can not stagger the waveform sequence that needs the alignment, the error analysis that has significantly reduced has improved waveform analysis and signal analysis's exactness.
Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that these specific embodiments are merely illustrative and that various omissions, substitutions and changes in the form and details of the methods and systems described above may be made by those skilled in the art without departing from the spirit and scope of the invention. For example, it is within the scope of the present invention to combine the above-described method steps to perform substantially the same function in substantially the same way to achieve substantially the same result. Accordingly, the scope of the invention is to be limited only by the following claims.
Claims (9)
1. The utility model provides an integrative synchronous dynamic distortion power source in table source that area was triggered which characterized in that: the power source includes:
the signal generator is used for generating a trigger signal with dynamic distortion as the electronic equipment for signal generation and signal excitation;
the power amplifier is used for amplifying the low-power signal so as to meet the requirement of circuit voltage for acquiring a dynamic distortion signal;
the sampling module is used for collecting the trigger signal output by the signal generator;
the synchronization module is used for receiving the trigger signal generated by the signal generator, realizing strict synchronization of the actual output signal of the synchronization module and the received trigger signal and realizing accurate synchronization of the actual output signal of the synchronization module and the signal sampled by the sampling module;
the input ends of the synchronization module and the power amplifier are respectively connected with the output end of the signal generator, the output end of the power amplifier is connected with the input end of the sampling module, the output end of the synchronization module is connected with the input end of the signal generator, and the output end of the sampling module is connected with the input end of the signal generator.
2. The table source integrated synchronous dynamic distortion power source with trigger of claim 1, characterized in that: the signal generator comprises a DSP computing unit and a D/A conversion unit connected with the DSP computing unit, wherein the DSP computing unit receives a sampling sequence input by the sampling module and a trigger signal sent by the synchronization module and converts the sampling sequence into a discrete sequence, and the D/A conversion unit receives the discrete sequence, converts a received discrete digital signal into a continuous analog signal and outputs the continuous analog signal.
3. The table source integrated synchronous dynamic distortion power source with trigger of claim 1, characterized in that: the synchronous module comprises a clock module with a built-in clock reference, and the clock module synchronizes and converts an external trigger signal or a trigger signal provided by the signal generator, and provides a sampling trigger signal for the D/A conversion unit and the sampling module, so that signals received by the D/A conversion unit and the sampling module are strictly synchronized.
4. The table source integrated synchronous dynamic distortion power source with trigger of claim 1, characterized in that: the sampling module comprises:
a sensor for sensing the analog continuous signal generated by the signal generator;
the input end of the signal conversion module is connected with the output end of the sensor and is used for converting the signal output by the sensor; and
the input end of the A/D conversion unit is connected with the output end of the signal conversion module and is used for converting the analog signal output by the signal conversion module into a digital signal; and is
The sampling module is used for sampling the analog quantity of the output loop of the power amplifier and transmitting the sampling sequence to the DSP computing unit in the signal generator.
5. The table source integrated synchronous dynamic distortion power source with trigger of claim 1, characterized in that: the power amplifier comprises a voltage power amplifier and a current power amplifier, wherein the voltage power amplifier is used for changing a small voltage signal into a large voltage signal, and the current power amplifier is used for changing a small current signal into a large current signal.
6. The table source integrated synchronous dynamic distortion power source with trigger of claim 5, wherein: the voltage power amplifier comprises a first operational amplifier circuit and a field effect transistor amplifier circuit, wherein the output end of the first operational amplifier circuit is connected with the input end of the field effect transistor amplifier circuit, the first operational amplifier circuit is an amplifier circuit based on OPA227, and the field effect transistor amplifier circuit is an amplifier circuit based on a field effect transistor.
7. The table source integrated synchronous dynamic distortion power source with trigger of claim 5, wherein: the voltage power amplifier comprises a second operational amplifier circuit and a triode amplifier circuit, the output end of the second operational amplifier circuit is connected with the input end of the triode amplifier circuit, the second operational amplifier circuit is an amplifier circuit based on OPA227, and the triode amplifier circuit is an amplifier circuit based on a triode.
8. The table source integrated synchronous dynamic distortion power source with trigger of claim 4, wherein: the A/D conversion unit is an analog-to-digital conversion circuit based on a successive comparison type, the analog-to-digital conversion circuit comprises a voltage comparator, a control logic circuit, a shift register, a data register and a D/A converter, the output end of the voltage comparator is connected with the input end of the control logic circuit, the output end of the control logic circuit is connected with the input ends of the shift register and the data register, the shift register and the data register output digital quantity, and the D/A converter outputs an analog quantity signal to the voltage comparator.
9. The table source integrated synchronous dynamic distortion power source with trigger of claim 2, characterized in that: the DSP computing unit is a TMS320F28335 type digital signal processor with a 32-bit floating point processing unit, wherein the DSP computing unit is a DSP + FPGA computing unit.
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| CN110568233A (en) * | 2019-03-11 | 2019-12-13 | 河南省计量科学研究院 | meter-source integrated synchronous dynamic distortion power source with trigger and implementation method |
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| CN110568233A (en) * | 2019-03-11 | 2019-12-13 | 河南省计量科学研究院 | meter-source integrated synchronous dynamic distortion power source with trigger and implementation method |
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