CN110488086A - The power measurement method and system of burst pulse - Google Patents
The power measurement method and system of burst pulse Download PDFInfo
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- CN110488086A CN110488086A CN201910890901.5A CN201910890901A CN110488086A CN 110488086 A CN110488086 A CN 110488086A CN 201910890901 A CN201910890901 A CN 201910890901A CN 110488086 A CN110488086 A CN 110488086A
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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
- G01R21/133—Arrangements for measuring electric power or power factor by using digital technique
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Abstract
The embodiment of the present application provides the power measurement method and system of a kind of burst pulse, the power measurement method of the burst pulse is applied to the power measuring system of burst pulse, the system includes: acquisition unit, peak holding circuit, microcontroller, acquisition unit is connect with peak holding circuit, and peak holding circuit is connect with microcontroller.This method comprises: the first power signal of acquisition unit acquisition burst pulse, the first power signal are rf power signal；First power signal is converted to the first voltage signal of burst pulse by acquisition unit；Peak holding circuit exports second voltage signal according to first voltage signal, and the pulsewidth of second voltage signal is greater than the pulsewidth of first voltage signal；Microcontroller samples second voltage signal, obtains voltage sample data；Power measurement corresponding with the first power signal is calculated according to voltage sample data in microcontroller.
Description
Technical field
This application involves signal detection fields, in particular to the power measurement method and system of a kind of burst pulse.
Background technique
Application with High-Power Microwave technology in fields such as high-energy particle accelerator, heating plasma, High power radars,
People propose increasingly higher demands to the measuring technique of High-Power Microwave.
However, High-Power Microwave usually has the characteristics that peak power height, pulse width, have higher requirements for processor.
For example, for the narrow pulse signal of nanosecond order, since pulsewidth is narrow, it usually needs select dedicated high-speed analog-to-digital conversion
Chip is sampled, and high-precision application specific processor or FPGA (Field Programmable Gata Array, scene are passed through
Programmable gate array) narrow pulse signal could be handled.
Summary of the invention
The power measurement method and system for being designed to provide a kind of burst pulse of the embodiment of the present application, it is existing to improve
The problem of detecting using general processor to narrow pulse signal is difficult in technology.
In a first aspect, the embodiment of the present application provides a kind of power measurement method of burst pulse, the power applied to burst pulse
Measuring system, the system comprises: acquisition unit, peak holding circuit, microcontroller, the acquisition unit and the peak value are protected
Circuit connection is held, the peak holding circuit is connect with the microcontroller；
The described method includes:
The acquisition unit acquires the first power signal, and first power signal is the rf power signal of burst pulse；
First power signal is converted to the first voltage signal of burst pulse by the acquisition unit；
The peak holding circuit exports second voltage signal, the second voltage signal according to the first voltage signal
Pulsewidth be greater than the first voltage signal pulsewidth；
The microcontroller samples the second voltage signal, obtains voltage sample data；
Power corresponding with first power signal is calculated according to the voltage sample data in the microcontroller
Measurement result.
By the above method, the first power signal of burst pulse can be converted by acquisition unit, peak holding circuit
For the biggish second voltage signal of pulsewidth.Microcontroller can sample the biggish second voltage signal of pulsewidth, and be based on
Power measurement is calculated in sampled result, the power measurement with the first power signal be it is corresponding, can be real with this
Now to the indirect measurement of the small signal of burst pulse power.The above method can be applied to general microcontroller, general microprocessor,
Traditional scheme is reduced for the high performance requirements of processor.For the general microcontroller, general using the above method
Microprocessor also can be realized even if the operating sampling frequency of device itself is unable to satisfy the frequency of narrow pulse signal for narrow
The power measurement of the small signal of pulse.
With reference to first aspect, in a kind of possible design, the microcontroller adopts the second voltage signal
Sample obtains voltage sample data, comprising:
The built-in converter of the microcontroller samples the second voltage signal, obtains voltage sample array work
For the voltage sample data.
By above-mentioned implementation, the sampling for second voltage signal is may be implemented in microcontroller itself, without
External high-precision analog-digital converter carries out data conversion, reduces system structure complexity.
With reference to first aspect, in a kind of possible design, the voltage sample data include the second voltage signal
The corresponding multiple voltage values of multiple sampled points, the microcontroller is calculated and described according to the voltage sample data
The corresponding power measurement of one power signal, comprising:
The microcontroller filters out the multiple sampling according to the multiple voltage value in the voltage sample data
The corresponding effective average voltage level of the effective sampling points is calculated in effective sampling points in point；
The microcontroller is calculated according to effective average voltage level and preset fitting corresponding relationship
The corresponding performance number of effective average voltage level, as the corresponding power measurement of first power signal.
By above-mentioned implementation, effective sampling points can be gone out according to second voltage signal screening, and are based on efficiently sampling
The voltage of point calculates effective average voltage level, is then determined and effective average voltage level according to the fitting corresponding relationship of setting
Corresponding performance number, as the corresponding power measurement of the first power signal.It can be according to the biggish second voltage of pulsewidth with this
Signal determines power corresponding to the first power signal of burst pulse, reduces the high performance requirements for microcontroller, tool
There is preferable market application prospect.
With reference to first aspect, in a kind of possible design, first power signal has at least two-way, at least two-way institute
It states in the first power signal including the output power signal of equipment under test, reflected power signal；
Power corresponding with first power signal is calculated according to the voltage sample data in the microcontroller
Measurement result, comprising:
Output power value is calculated according to the corresponding voltage sample data of the output power signal in the microcontroller；
Reflection power value is calculated according to the corresponding voltage sample data of the reflected power signal in the microcontroller；
Standing-wave ratio is calculated according to the output power value and the reflection power value in the microcontroller, described
Standing-wave ratio is as power measurement corresponding with the output power signal and the reflected power signal.
By above-mentioned implementation, the narrow pulse signal that microcontroller can be unknown at least two-way carries out power measurement.
When, there are when the output power signal and reflected power signal of equipment under test, microcontroller can calculate separately at least two paths of signals
The corresponding reflection power value of the corresponding output power value of output power signal, reflected power signal out, and based on output power value,
Reflection power value calculates standing-wave ratio.By the calculating to standing-wave ratio, facilitate user according to calculated standing-wave ratio to output
Output power signal or the equipment under test for outputing reflected power signal carry out feedback regulation.
With reference to first aspect, in a kind of possible design, the acquisition unit includes wave detector, and the acquisition unit will
First power signal is converted to the first voltage signal of burst pulse, comprising:
The wave detector carries out detection to first power signal, obtains the first voltage signal of burst pulse.
During above-mentioned realization, the first power signal of burst pulse can be converted to the of burst pulse by wave detector
One voltage signal realizes the conversion of power signal to voltage signal.
With reference to first aspect, in a kind of possible design, the acquisition unit includes wave detector, operational amplifier, institute
State the first voltage signal that first power signal is converted to burst pulse by acquisition unit, comprising:
The wave detector carries out detection to first power signal, obtains the first rectified signal of burst pulse；
The operational amplifier carries out operation amplifier to first rectified signal, obtains the first voltage of burst pulse
Signal.
During above-mentioned realization, the conversion of power signal to voltage signal, operation amplifier may be implemented by wave detector
The small signal of voltage can be carried out operation amplifier by device, and in order to which subsequent conditioning circuit can recognize, range is wider, the stronger electricity of signal
Signal is pressed, microcontroller can more easily carry out signal acquisition.
With reference to first aspect, in a kind of possible design, the peak holding circuit includes trsanscondutance amplifier, two poles
Pipe, holding capacitor, voltage buffer, the peak holding circuit export second voltage signal according to the first voltage signal,
Include:
The trsanscondutance amplifier exports charging signals according to the first voltage signal, and the charging signals are for controlling institute
Diode current flow is stated to charge to the holding capacitor, or for controlling the diode cut-off so that the holding capacitor
The voltage of output remains unchanged；
The voltage buffer exports second voltage signal according to the signal that the holding capacitor exports.
During above-mentioned realization, trsanscondutance amplifier can according to the variation of first voltage signal control diode current flow or
The signal of cut-off, holding capacitor output can change according to the variation of diode, and voltage buffer can export holding capacitor
Signal be coupled as second voltage signal, above-mentioned peak holding circuit can realize the extension of pulsewidth.
Second aspect, the embodiment of the present application provide a kind of power measuring system of burst pulse, the system comprises: acquisition is single
Member, peak holding circuit, microcontroller；
The acquisition unit is connect with the peak holding circuit, and the peak holding circuit and the microcontroller connect
It connects；
The acquisition unit, for acquiring the first power signal, first power signal is the radio-frequency power of burst pulse
Signal；
The acquisition unit is also used to be converted to first power signal first voltage signal of burst pulse；
The peak holding circuit, for exporting second voltage signal, second electricity according to the first voltage signal
The pulsewidth of signal is pressed to be greater than the pulsewidth of the first voltage signal；
The microcontroller obtains voltage sample data for sampling to the second voltage signal；
The microcontroller is also used to be calculated according to the voltage sample data corresponding with first power signal
Power measurement.
The method that aforementioned first aspect offer can be executed by the power measuring system of above-mentioned burst pulse, even if microcontroller
The operating sampling frequency of device itself is unable to satisfy the frequency of narrow pulse signal, can also complete signal small for burst pulse power
Measurement.
In conjunction with second aspect, in a kind of possible design, the acquisition unit includes wave detector；
The wave detector is used to carry out detection to first power signal, obtains the first voltage signal.
The first power signal of burst pulse can be converted to by wave detector the first voltage signal of burst pulse with this, it is real
The conversion of power signal to voltage signal is showed.
In conjunction with second aspect, in a kind of possible design, the system comprises at least two-way to acquire route；
Any route in at least two-way acquisition route includes: the acquisition unit and connects with the acquisition unit
The peak holding circuit connect；
At least two-way acquires route, for transmitting at least two-way second voltage signal to the microcontroller；
The microcontroller, at least two groups performance number to be calculated according at least two-way second voltage signal.
By above-mentioned implementation, narrow pulse signal that can be unknown to multichannel carries out power measurement, improves to unknown
The small signal of burst pulse power measurement efficiency.
To enable the above objects, features, and advantages of the application to be clearer and more comprehensible, special embodiment below, and appended by cooperation
Attached drawing is described in detail below.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application will make below to required in the embodiment of the present application
Attached drawing is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore should not be seen
Work is the restriction to range, for those of ordinary skill in the art, without creative efforts, can be with
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of schematic diagram of the power measuring system of burst pulse provided by the embodiments of the present application.
Fig. 2 is a kind of schematic diagram of signal conversion process provided by the embodiments of the present application.
Fig. 3 is the schematic diagram of the power measuring system of the burst pulse in an example provided by the embodiments of the present application.
Fig. 4 is a kind of flow chart of the power measurement method of burst pulse provided by the embodiments of the present application.
Fig. 5 is the voltage sample schematic diagram in an example provided by the embodiments of the present application.
Icon: 10- power measuring system；100- acquisition unit；A- wave detector；B1- operational amplifier；200- peak holding
Circuit；B2- trsanscondutance amplifier；B3- voltage buffer；I- constant-current source；D- diode；C- holding capacitor；300- microcontroller.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application is described.
Referring to Fig. 1, Fig. 1 is a kind of schematic diagram of the power measuring system 10 of burst pulse provided by the embodiments of the present application.
For ease of description, the power measuring system 10 of the burst pulse is referred to as power measuring system 10 in further part introduction.
Wherein, the power measuring system 10 of the burst pulse can measure unknown power signal, the unknown function
Rate signal may be by the narrow pulse signal for the coupler output being of coupled connections with equipment under test.
Narrow pulse signal can indicate that pulsewidth (Pulse-Width, pulse width, abbreviation pulsewidth) is that nanosecond order is even low
In the signal of nanosecond order.
Equipment under test may be broad band amplifier, power source and other equipment that can export burst pulse power signal.
By taking equipment under test is power source as an example, power source can be of coupled connections with two couplers, in two couplers
The signal that is exported of one of coupler may be forward signal, the signal that another coupler is exported may be reversed
Signal.Forward signal indicates output power signal, and forward signal is usually useful signal；Reverse signal indicates reflection power letter
Number, it indicates by other connecting lines or the reflected signal of other equipment, it will usually be supported and be absorbed.
Forward signal, reverse signal have directionality.Forward signal, the specific acquisition position of reverse signal are different, but not
By the reverse signal of the forward signal or burst pulse that are burst pulse, the first function in the application any embodiment all can serve as
Rate signal.
As shown in Figure 1, the power measuring system 10 of burst pulse provided by the embodiments of the present application may include acquisition unit 100,
Peak holding circuit 200, microcontroller 300.
Acquisition unit 100 is connect with peak holding circuit 200, and peak holding circuit 200 is connect with microcontroller 300.
Acquisition unit 100 is converted into burst pulse for acquiring the first power signal of burst pulse, and by the first power signal
First voltage signal, first power signal be rf power signal.
Peak holding circuit 200, for exporting second voltage signal, the arteries and veins of second voltage signal according to first voltage signal
It is wider than the pulsewidth of first voltage signal.
Microcontroller 300, for being sampled to second voltage signal to obtain voltage sample data.
Microcontroller 300 is also used to be calculated power corresponding with the first power signal according to voltage sample data and surveys
Measure result.
Wherein, the terminal of " IN " instruction in Fig. 2 or Fig. 3 can be used for accessing the first power signal, and the first power signal is
The unknown small signal of RF coupling power.
In an example, the pulsewidth of the first power signal can be nanosecond order.
After the first power signal, which is collected unit 100, carries out signal conversion, the first power signal is converted into first voltage
Signal, first voltage signal are identical as the pulsewidth magnitude of the first power signal.
As shown in Fig. 2, after first voltage signal carries out signal conversion by peak holding circuit 200, the first of burst pulse
Voltage signal is converted into the biggish second voltage signal of pulsewidth.
In an example, the pulsewidth of second voltage signal can be musec order.
As a kind of implementation, after obtaining the biggish second voltage signal of pulsewidth, microcontroller 300 can be collected
Second voltage signal is then based on voltage sample data and calculates a performance number, the performance number to obtain voltage sample data
As power measurement corresponding with the first power signal.
Wherein, for the first power signal of every road inputted in measurement process each time, microcontroller 300 can be calculated
Power measurement to a performance number, as first power signal of road.After being updated to first power signal,
Microcontroller 300 can calculate a new performance number, as the corresponding power measurement knot of updated first power signal
Fruit.
For the power measuring system 10 of above-mentioned burst pulse, even if the sample frequency of microcontroller 300 is lower, microcontroller
300 operating sampling frequencies itself are unable to satisfy the frequency of the first power signal, by sampling unit to the first power signal institute
Pulsewidth made by the signal conversion of work and peak holding circuit 200 extends, and can turn the unknown small signal of burst pulse power
Turn to the biggish voltage signal of pulsewidth.Then microcontroller 300 can be sampled based on the biggish voltage signal of pulsewidth, and according to
Voltage sample data calculate power measurement corresponding with the first power signal.Make general microcontroller 300 with this
Or general processor can also complete the measurement of signal small for burst pulse power, no longer need to by high-speed, high-precision
Application specific processor or FPGA (Field Programmable Gata Array, field programmable gate array) carry out power measurement.
Wherein, general processor or general microcontroller 300 refer to that operating sampling frequency is difficult to meet the frequency of the first power signal
Rate, thus the processor or controller that can not directly be measured to the first power signal.
Under normal conditions, if to build measurement system using processors such as high performance application specific processor chip or FPGA
System, can face more complicated periphery circuit design, and if using the power measurement of burst pulse provided by the embodiments of the present application
System 10 carries out power measurement, can simplify the structure of measuring system.
Optionally, as shown in figure 3, acquisition unit 100 may include wave detector A, operational amplifier B1.
Wave detector A is connect with operational amplifier B1, and operational amplifier B1 is connect with peak holding circuit 200.
Wave detector A obtains the first rectified signal of burst pulse for carrying out detection to the first power signal.First detection
Signal is voltage signal.
Operational amplifier B1, for carrying out operation amplifier to the first rectified signal to obtain first voltage signal, and by the
One voltage signal is transmitted to peak holding circuit 200.
In an example, operational amplifier B1 can be difference amplifier, for carrying out difference to the first rectified signal
Amplification is to obtain first voltage signal.
If the first power signal is forward signal, wave detector A can be used for positive detection, if the first power signal is reversed
Signal, wave detector A can be used for reversed detection.
As an implementation, wave detector A can be envelope/peak detector A, carry out for the signal to burst pulse
Envelope detection.
In an example, wave detector A can use envelope/peak detector A of model ADL5511.Operation amplifier
Device B1 can use the amplifier of model LMH6612MA, to realize operation amplifier function.
With this conversion of power signal to voltage signal can be realized by wave detector A, it can be with by operational amplifier B1
Operation amplifier is carried out to the small signal of voltage, in order to which subsequent conditioning circuit can recognize, range is wider, the stronger voltage signal of signal,
Microcontroller can more easily carry out signal acquisition.
In other embodiments, operational amplifier B1 can have multistage, to realize the effect of multistage amplification.
Optionally, if the signal that wave detector A is exported is enough that subsequent conditioning circuit is allowed to be identified, it can be omitted operation amplifier
Device B1.
In the case where omitting operational amplifier B1, wave detector A can be used for carrying out detection to the first power signal, obtain the
One voltage signal.Believed with this by the first voltage that wave detector A can convert the first power signal of burst pulse to burst pulse
Number, realize the conversion of power signal to voltage signal.
Optionally, peak holding circuit 200 may include trsanscondutance amplifier B2, diode D, holding capacitor C, voltage buffer
Device B3.
An input terminal of trsanscondutance amplifier B2 is connect with the output end of acquisition unit 100, the output of trsanscondutance amplifier B2
End is connect with the anode of diode D, and the cathode of diode D is connect with holding capacitor C.Holding capacitor C also with voltage buffer
The input terminal of B3 connects, and the output end of voltage buffer B3 is connect with microcontroller 300, and voltage buffer B3 can be by the letter of output
Number feedback arrive trsanscondutance amplifier B2 another input terminal.
Wherein, trsanscondutance amplifier B2 can carry out at conversion the voltage difference between first voltage signal, second voltage signal
Reason, the output signal of trsanscondutance amplifier B2 is current signal.The constant-current source I being connect in Fig. 3 with trsanscondutance amplifier B2 be used for for across
It leads amplifier B2 and one static loop is provided.
If second voltage signal is less than first voltage signal, the current signal of trsanscondutance amplifier B2 output passes through diode
D charges to holding capacitor C.If second voltage signal is greater than or equal to first voltage signal, diode D cut-off is kept
Voltage on capacitor C remains unchanged.Voltage buffer B3 can collect the signal intensity on holding capacitor C.
The pulsewidth of the first voltage signal of burst pulse can be extended by above-mentioned peak holding circuit 200 and keep one
The section time, the biggish second voltage signal of pulsewidth is obtained, in order to carry out at sampling using general low rate A/D coveters
Reason.
The analog-digital converter of the low rate may be the built-in converter of microcontroller 300, it is also possible to external converter.
Optionally, in order to make narrow pulse peak keep response speed faster, build peak holding circuit in selector
The delay that trsanscondutance amplifier B2, diode D, voltage buffer B3 can be reduced when 200 as far as possible, it is biggish to can also be used bandwidth
Trsanscondutance amplifier B2 and voltage buffer B3.In an example, the operational amplifier that bandwidth is 100,000,000 magnitudes can be used to build
Peak holding circuit 200.
In an example, the integrated chip realization of model OPA615 can be used in peak holding circuit 200, OPA615's
It include an operation transconductance amplifier B2, voltage buffer B3 and a concurrent switching circuit in chip, when its switch is enabled
When, the output electric current of trsanscondutance amplifier B2 is big, can charge to holding capacitor C rapidly, and when a switch is off, shutdown resistance is big, can
So that the charge on holding capacitor C remains unchanged as far as possible.Peak holding circuit 200 in this can be realized nanosecond arteries and veins
Wide signal peak is kept, so that the Sampling Interface of subsequent microcontroller 300 can collect useful signal, so that power is surveyed
Amount system 10 can measure a variety of unknown burst pulse power signals, and ensure Measurement reliability.
Wherein, diode D is affected for the parameter of power measuring system 10, since diode D is being connected, is ending it
Between have the time difference, there are reverse leakage currents, and reverse leakage current is bigger, and the sagging rate of circuit is bigger.In view of this because
Element can be used the diode D that forward conduction voltage is small, switch time is fast, recovery time section and junction capacity are small and build peak holding
Circuit 200, such as can use but be not limited to Schottky diode D.
Optionally, power measuring system 10 may include that at least two-way acquires route, and at least two-way acquisition route is available for this
In the narrow pulse signal for acquiring different equipment under tests, it can also be used to acquire a variety of narrow pulse signals of same equipment under test.
Wherein, which is possibly used for the output power to an equipment under test
Signal carries out power measurement, it is also possible to measure for the reflected power signal to the equipment under test, it is also possible to for another
The incident power signal of one equipment under test measures, and the incident power signal of burst pulse can be used as above-mentioned the first power letter
Number.
Any route at least in two-way acquisition route can include: acquisition unit 100 and connect with acquisition unit 100
Peak holding circuit 200, the output end of peak holding circuit 200 in any acquisition route connect with microcontroller 300.
As a kind of implementation, at least two-way acquisition route is used for the transmission of microcontroller 300 at least two-way second for this
Voltage signal.Microcontroller 300 is used to that at least two groups performance number to be calculated according at least two-way second voltage signal.
Wherein, one group of performance number correspondence acquires route all the way.Performance number number in every group of performance number and actually enter the
The update times of one power signal are related, and the performance number number in every group of performance number may be one, it is also possible to multiple.
The power measuring system 10 for acquiring the burst pulse of route by being provided at least two-way, can be unknown to multichannel it is narrow
Pulse signal carries out power measurement respectively, improves the measurement efficiency to the unknown small signal of burst pulse power.
Optionally, if this at least in two-way acquisition route the first power signal for acquiring include all the way output power signal and
Reflected power signal all the way corresponding with the output power signal, then this at least two-way acquisition route in have at least two acquisition lists
Member 100 acquires two the first power signals respectively, and a signal in two first power signals is output power signal, separately
One signal is reflected power signal.
It is respectively used to two acquisition units 100 and two peak holdings of acquisition output power signal, reflected power signal
Circuit 200 connects, which is respectively used to output positive second voltage corresponding with output power signal
Signal, reversed second voltage signal corresponding with reflected power signal.Two input terminals of microcontroller 300 can be respectively to forward direction
Second voltage signal, reversed second voltage signal carry out voltage sample, and are calculated separately out according to sampled result and output power
The corresponding output power value of signal, reflection power value corresponding with reflected power signal.Output power value can be used as and output work
The corresponding power measurement of rate signal, reflection power value can be used as power measurement corresponding with reflected power signal.
In the case where calculating output power value, reflection power value, microcontroller 300 can be used for according to output power
Value, reflection power value calculate standing-wave ratio, and standing-wave ratio is as power measurement knot corresponding with output power signal, reflected power signal
Fruit.By calculating to standing-wave ratio configuration, facilitate user according to calculated standing-wave ratio to output output power signal or
The equipment under test for outputing reflected power signal carries out feedback regulation, and above scheme has good market application prospect.
Based on the same inventive concept, the embodiment of the present application also provides a kind of power measurement system that can be applied to aforementioned burst pulse
The power measurement method of the burst pulse of system 10.The power measurement method of the burst pulse can be held by aforementioned power measuring system 10
Row.
Referring to Fig. 4, Fig. 4 is a kind of flow chart of the power measurement method of burst pulse provided by the embodiments of the present application.
As shown in figure 4, the power measurement method of the burst pulse may include step S21-S25.
S21: acquisition unit 100 acquires the first power signal, and the first power signal is the rf power signal of burst pulse.
S22: the first power signal is converted to the first voltage signal of burst pulse by acquisition unit 100.
S23: peak holding circuit 200 exports second voltage signal, the arteries and veins of second voltage signal according to first voltage signal
It is wider than the pulsewidth of first voltage signal.
S24: microcontroller 300 samples second voltage signal, obtains voltage sample data.
S25: power measurement knot corresponding with the first power signal is calculated according to voltage sample data in microcontroller 300
Fruit.
First power signal of burst pulse can be turned by acquisition unit 100, peak holding circuit 200 by the above method
It is changed to the biggish second voltage signal of pulsewidth.Microcontroller 300 can sample the biggish second voltage signal of pulsewidth, and base
Power measurement is calculated in sampled result, the indirect measurement to the small signal of burst pulse power can be realized with this.Wherein, should
Power measurement is corresponding with the first power signal.
The above method can be applied to general microcontroller 300, general microprocessor, reduce traditional scheme for place
Manage the high performance requirements of device.Even if the operating sampling frequency of microcontroller 300 is lower, signal small for burst pulse also can be realized
Power measurement.Wherein, general microcontroller 300, general microprocessor, refer to the operating sampling frequency of device itself without
Method meets the controller of the frequency of narrow pulse signal, processor.
As an implementation, the microcontroller 300 in the embodiment of the present application can be the processor of musec order.
Optionally, for above-mentioned S24, can specifically include: the built-in converter of microcontroller 300 is to second voltage signal
It is sampled, obtains voltage sample array as voltage sample data.
Since the pulsewidth of second voltage signal is by extension, even if the built-in analog-digital converter of microcontroller 300
Sample frequency is low, also can satisfy the sample requirement to second voltage signal, reduces to external high-speed analog-digital converter
Dependence.Microcontroller 300 itself can realize the sampling to second voltage signal, turn without external high-precision modulus
Parallel operation carries out data conversion, can simplied system structure.
Optionally, voltage sample data may include the corresponding multiple voltage values of multiple sampled points of second voltage signal, on
Stating S25 may include: S251-S252.
S251: microcontroller 300 filters out in the multiple sampled point according to multiple voltage values in voltage sample data
Effective sampling points, the corresponding effective average voltage level of effective sampling points is calculated.
S252: microcontroller 300 is calculated according to effective average voltage level and preset fitting corresponding relationship
The corresponding performance number of effective average voltage level, as the corresponding power measurement of the first power signal.
As an implementation, the analog-to-digital conversion port of microcontroller 300 can collect second voltage signal, into
After row analog-to-digital conversion, the available voltage sample data comprising multiple voltage values, each voltage value in multiple voltage value
A corresponding sampled point.
After obtaining the corresponding multiple voltage values of multiple sampled points, effective voltage can be filtered out from multiple voltage values
Value, the corresponding sampled point of effective voltage value is effective sampling points.
The number of effective voltage value is related with the first power signal actually entered, multiple effective for what is determined every time
Voltage value, multiple effective voltage values may be identical, it is also possible to different.
Wherein, effective voltage value may be greater than the voltage value of given threshold.The given threshold can be 0,0.1,0.2,
0.5,0.8 equivalent voltage threshold.
After determining effective voltage value or effective sampling points, flat are asked to all effective voltage values during one-shot measurement
, effective average voltage level V corresponding with first power signal can be obtained.According to effective average voltage level V and in advance
The fitting corresponding relationship of setting, it may be determined that go out the corresponding performance number of the effective average voltage level V, the function as the first power signal
Rate measurement result.
Wherein, fitting corresponding relationship may be showed in the form of matched curve, it is also possible to the exhibition in the form of fitting expression
It is existing, it is also possible to be showed in the form of tables of data.
Being fitted corresponding relationship can determine that the fitting corresponding relationship of acquisition unit is fixed according to actual acquisition unit
, fitting corresponding relationship corresponding to the acquisition unit is assured that out after acquisition unit is calibrated.For example, every kind of detection
Device is corresponding with fixed matched curve or fitting expression, can be used as a kind of fitting corresponding relationship.
As a kind of implementation, if fitting corresponding relationship performance is matched curve, the abscissa of matched curve be can be
Voltage, ordinate can be power.It, can be bent according to fitting by the way that calculated effective average voltage level V is substituted into matched curve
Line determines that performance number corresponding with the effective average voltage level V, as the corresponding power measurement of the first power signal.
If wanting to realize the power measurement to multiple first power signals, multiple groups can be respectively obtained by multi pass acquisition route
Sampled data, and multiple effective average voltage levels are calculated, each effectively average voltage level can correspond to first power signal,
It can determine that the corresponding multiple power measurements of multiple first power signals based on preset fitting corresponding relationship.
In an example, as shown in figure 5, n sampling can be randomly selected according to the signal period T of second voltage signal
Point obtains n voltage value corresponding with n sampled point.N sampled point may correspond to the hits of multiple signal period T
According to.N is the integer greater than zero.
Wherein, the number of sampling points chosen in each signal period T can be identical.
By taking Fig. 5 as an example, sampling has obtained the n voltage value of n sampled point in Fig. 5.In the n sampled point, the 2nd,
3, the corresponding voltage value of 7,8 ... n sampled points is effective voltage value, and the 2nd, 3,7,8 ... n sampled points are effectively to sample
Point, remaining sampled point are denoted as invalid sampled point.Institute corresponding to the 2nd, 3,7,8 ... n sampled point these effective sampling points
After having effective voltage value averaging, the corresponding effective average voltage level V of the available n sampled point.Effectively according to this
Average voltage level V and preset fitting corresponding relationship can determine a performance number, the power as the first power signal
Measurement result.
Effective sampling points can be determined according to second voltage signal with this, and the voltage based on effective sampling points calculates
Then effective average voltage level determines performance number corresponding with effective average voltage level according to the fitting corresponding relationship of setting,
As power measurement corresponding with the first power signal.With this arteries and veins can be determined according to the biggish second voltage signal of pulsewidth
Power corresponding to wide lesser first power signal, reduces the high performance requirements for microcontroller 300, has preferable
Market application prospect.
Optionally, the first power signal can have at least two-way, this at least may include in the first power signal of two-way by
The output power signal of measurement equipment, reflected power signal.Output power signal, the acquisition position of reflected power signal are different.On
Stating S25 can specifically include: S253-S255.
S253: output power value is calculated according to the corresponding voltage sample data of output power signal in microcontroller 300.
S254: reflection power value is calculated according to the corresponding voltage sample data of reflected power signal in microcontroller 300.
S255: standing-wave ratio is calculated according to output power value and reflection power value in microcontroller 300, and standing wave is compared to
For power measurement corresponding with output power signal and reflected power signal.
Computation sequence about above-mentioned S253, S254 can exchange, such as may be performed simultaneously S253, S254, can also be with
S253 is first carried out, then executes S254, S254 can also be first carried out, execute S253 again.
It should be noted that about mutual corresponding output power signal, reflected power signal on the signal acquisition time
It needs to correspond to, for example, output power signal and reflected power signal can be acquired simultaneously using two-way route and then obtain two groups
Voltage sample data guarantee that calculated output power value, reflection power value are mutual corresponding in time with this.
Optionally, if each signal at least two first power signals is positive narrow pulse signal, microcontroller
Device 300 can calculate at least two output power values.If each signal at least two first power signal is reversed
Narrow pulse signal, microcontroller 300 can calculate at least two reflection power values.
By above-mentioned implementation method, the narrow pulse signal that microcontroller 300 can be unknown at least two-way carries out power measurement.
When, there are when one group of mutual corresponding output power signal and reflected power signal, microcontroller 300 can at least two paths of signals
The corresponding reflection power value of the corresponding output power value of output power signal, reflected power signal is calculated separately out, and based on defeated
Performance number, reflection power value calculate standing-wave ratio out.By the calculating to standing-wave ratio, facilitate user according to calculated standing wave
Compare the equipment under test progress feedback regulation for outputing output power signal.
As a kind of implementation, acquisition unit 100 may include wave detector A, above-mentioned S22 can include: wave detector A is to first
Power signal carries out detection, obtains the first voltage signal of burst pulse.
The first power signal of burst pulse can be converted to by wave detector A the first voltage signal of burst pulse with this, it is real
Conversion of the existing power signal to voltage signal.
As another implementation, acquisition unit 100 may include wave detector A, operational amplifier B1, and above-mentioned S22 can be wrapped
Include: wave detector A carries out detection to the first power signal, obtains the first rectified signal；Operational amplifier B1 is to the first rectified signal
Operation amplifier is carried out, the first voltage signal of burst pulse is obtained.
The conversion of power signal to voltage signal can be realized by wave detector A with this, by operational amplifier B1 by voltage
Small signal carries out operation amplifier, can recognize that range is wider, the stronger voltage signal of signal convenient for subsequent conditioning circuit.
Optionally, peak holding circuit 200 may include trsanscondutance amplifier B2, diode D, holding capacitor C, voltage buffer
B3, above-mentioned S23 may include S231-S232.
S231: trsanscondutance amplifier B2 exports charging signals according to first voltage signal, and charging signals are for controlling diode D
Conducting ends to charge to holding capacitor C, or for controlling diode D so that the voltage of holding capacitor C output maintains not
Become.
S232: voltage buffer B3 exports second voltage signal according to the signal that holding capacitor C is exported.
Trsanscondutance amplifier B2 can be used with this, diode D on or off is controlled according to the variation of first voltage signal, and
The signal of holding capacitor C output can change according to the variation of diode D, can be defeated by holding capacitor C by voltage buffer B3
Signal out is coupled as second voltage signal, and above-mentioned peak holding circuit can realize the extension of pulsewidth.
The more details of power measurement method about burst pulse provided by the embodiments of the present application can refer to aforementioned power
Associated description in measuring system 10, details are not described herein.
In embodiment provided herein, it should be understood that disclosed method, it can be real by another way
It is existing.Embodiments described above is only schematical, for example, the division of unit, only a kind of logical function partition is real
There may be another division manner when border is realized, in another example, multiple units or components may be combined or can be integrated into another
A system, or some features can be ignored or not executed.Another point, mutual coupling, direct-coupling or communication connection
It can be the indirect coupling or communication connection by some communication interfaces, device or unit, can be electrical property, it is mechanical or other
Form.
In addition, unit may or may not be physically separated as illustrated by the separation member, it can basis
Some or all of the units may be selected to achieve the purpose of the solution of this embodiment for actual needs.
Herein, relational terms such as first and second and the like be used merely to by an entity or operation with it is another
One entity or operation distinguish, and without necessarily requiring or implying between these entities or operation, there are any this reality
Relationship or sequence.
The above is only embodiments herein, the protection scope being not intended to limit this application, for this field
For technical staff, various changes and changes are possible in this application.Within the spirit and principles of this application, made any
Modification, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (10)
1. a kind of power measurement method of burst pulse, which is characterized in that applied to the power measuring system of burst pulse, the system
It include: acquisition unit, peak holding circuit, microcontroller, the acquisition unit is connect with the peak holding circuit, the peak
Value holding circuit is connect with the microcontroller；
The described method includes:
The acquisition unit acquires the first power signal, and first power signal is the rf power signal of burst pulse；
First power signal is converted to the first voltage signal of burst pulse by the acquisition unit；
The peak holding circuit exports second voltage signal, the arteries and veins of the second voltage signal according to the first voltage signal
It is wider than the pulsewidth of the first voltage signal；
The microcontroller samples the second voltage signal, obtains voltage sample data；
Power measurement corresponding with first power signal is calculated according to the voltage sample data in the microcontroller
As a result.
2. the method according to claim 1, wherein the microcontroller adopts the second voltage signal
Sample obtains voltage sample data, comprising:
The built-in converter of the microcontroller samples the second voltage signal, obtains voltage sample array as institute
State voltage sample data.
3. the method according to claim 1, wherein the voltage sample data include the second voltage signal
The corresponding multiple voltage values of multiple sampled points, the microcontroller is calculated and described according to the voltage sample data
The corresponding power measurement of one power signal, comprising:
The microcontroller filters out in the multiple sampled point according to the multiple voltage value in the voltage sample data
Effective sampling points, the corresponding effective average voltage level of the effective sampling points is calculated；
The microcontroller is calculated described according to effective average voltage level and preset fitting corresponding relationship
The corresponding performance number of effective average voltage level, as the corresponding power measurement of first power signal.
4. the method according to claim 1, wherein first power signal has at least two-way, at least two-way
Output power signal, reflected power signal in first power signal including equipment under test；
Power measurement corresponding with first power signal is calculated according to the voltage sample data in the microcontroller
As a result, comprising:
Output power value is calculated according to the corresponding voltage sample data of the output power signal in the microcontroller；
Reflection power value is calculated according to the corresponding voltage sample data of the reflected power signal in the microcontroller；
Standing-wave ratio, the standing wave is calculated according to the output power value and the reflection power value in the microcontroller
Than as power measurement corresponding with the output power signal and the reflected power signal.
5. the method according to claim 1, wherein the acquisition unit includes wave detector, the acquisition unit
First power signal is converted to the first voltage signal of burst pulse, comprising:
The wave detector carries out detection to first power signal, obtains the first voltage signal of burst pulse.
6. the method according to claim 1, wherein the acquisition unit includes wave detector, operational amplifier, institute
State the first voltage signal that first power signal is converted to burst pulse by acquisition unit, comprising:
The wave detector carries out detection to first power signal, obtains the first rectified signal of burst pulse；
The operational amplifier carries out operation amplifier to first rectified signal, obtains the first voltage letter of burst pulse
Number.
7. the method according to claim 1, wherein the peak holding circuit includes trsanscondutance amplifier, two poles
Pipe, holding capacitor, voltage buffer, the peak holding circuit export second voltage signal according to the first voltage signal,
Include:
The trsanscondutance amplifier exports charging signals according to the first voltage signal, and the charging signals are for controlling described two
Pole pipe is connected to charge to the holding capacitor, or ends for controlling the diode so that the holding capacitor exports
Voltage remain unchanged；
The voltage buffer exports second voltage signal according to the signal that the holding capacitor exports.
8. a kind of power measuring system of burst pulse, which is characterized in that the system comprises: acquisition unit, peak holding circuit,
Microcontroller；
The acquisition unit is connect with the peak holding circuit, and the peak holding circuit is connect with the microcontroller；
The acquisition unit, for acquiring the first power signal, first power signal is the rf power signal of burst pulse；
The acquisition unit is also used to be converted to first power signal first voltage signal of burst pulse；
The peak holding circuit, for exporting second voltage signal, the second voltage letter according to the first voltage signal
Number pulsewidth be greater than the first voltage signal pulsewidth；
The microcontroller obtains voltage sample data for sampling to the second voltage signal；
The microcontroller is also used to that function corresponding with first power signal is calculated according to the voltage sample data
Rate measurement result.
9. system according to claim 8, which is characterized in that the acquisition unit includes wave detector；
The wave detector is used to carry out detection to first power signal, obtains the first voltage signal.
10. system according to claim 8, which is characterized in that
The system comprises at least two-way to acquire route；
Any route in at least two-way acquisition route includes: the acquisition unit and connect with the acquisition unit
Peak holding circuit；
At least two-way acquires route, for transmitting at least two-way second voltage signal to the microcontroller；
The microcontroller, at least two groups performance number to be calculated according at least two-way second voltage signal.
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Application publication date: 20191122 |