CN209562564U - Power detection device - Google Patents
Power detection device Download PDFInfo
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- CN209562564U CN209562564U CN201822213259.0U CN201822213259U CN209562564U CN 209562564 U CN209562564 U CN 209562564U CN 201822213259 U CN201822213259 U CN 201822213259U CN 209562564 U CN209562564 U CN 209562564U
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Abstract
This application involves a kind of power detection devices, including protection circuit, detecting circuit and data processing equipment.The protection circuit includes first end and second end, and the first end is for receiving measured signal, the second end ground connection, for preventing load reflection power excessive.The detecting circuit is electrically connected with the first end and the second end respectively, is converted into direct current signal for sampling measured signal, and by pulse signal to be measured.The data processing equipment is electrically connected with the detecting circuit, for receiving the output signal of the detecting circuit and calculating the power of measured signal.Above-mentioned power detection device can prevent the excessive caused device failure of reflection power under load damaged condition.Reduce the consumption of radio frequency amount in power detection engineering, while realizing that power is accurately detected to measured signal under the premise of not influencing the protection circuit output end power and load.The power detection device can be used for quality and fault detection.
Description
Technical field
This application involves radio-frequency power detection technique fields, more particularly to a kind of power detection device.
Background technique
The output of its radio-frequency power must be monitored and controlled in most of radio-frequency apparatus, to reduce radio frequency interference and electric power to the greatest extent
It uses, meets government's relevant regulations.Radio frequency sending set can reduce transimission power by monitoring control radio-frequency power output, thus
Increase runing time and reduces power loss.
Radio-frequency power detection typically refers to the measurement of the radio-frequency power indicated in electronic circuit with voltage and current, the value
Usually relative value.There are three types of architectures for solving the problems, such as that radio-frequency power detects, and is mean effective power detection, day respectively
Will power detection and monitoring of peak.Above-mentioned three kinds of modes generally use RF IC.So in certain circumstances, it needs
Being used in mixed way for module and the relevant technologies is wanted, such as root mean square (root mean square, RMS), logarithm (log) and Xiao Jite
Peak (Schottky peak).Wherein, the peak Xiao Jite is also known as envelope.Certainly, different power detecting schemes is related to different
Circuit structure.
Although smaller volume and lower power loss may be implemented in the prior art, but can not influence output signal and defeated
Output power is accurately detected under the premise of impedance out.
Utility model content
Based on this, it is necessary to can not accurately be examined under the premise of not influencing output signal and output impedance for the relevant technologies
The problem of surveying output power, provides a kind of power detection device.
A kind of power detection device, comprising:
Circuit is protected, the protection circuit includes first end and second end, and the first end is for receiving measured signal, institute
Second end ground connection is stated, for preventing load reflection power excessive；
Detecting circuit is electrically connected with the first end and the second end respectively, for sampling measured signal, and will be to be measured
Pulse signal is converted into direct current signal；And
Data processing equipment is electrically connected with the detecting circuit, by receive the detecting circuit output signal and based on
Calculate the power of measured signal.
Above-mentioned power detection device can prevent reflection power under load damaged condition by the way that the protection circuit is arranged
Device failure caused by excessive.The detecting circuit is electrically connected with the first end of the protection circuit and the second end,
Detection can be carried out by the reflection signal to forward signal respectively, thus by the forward signal of impulse form and reflection signal rectification filter
Wave is direct current signal, reduces the consumption of radio frequency amount.Measured signal is being transferred into the data processing after the detecting circuit
Device can realize that power carries out quasi- to measured signal under the premise of not influencing the protection circuit output end power and load
Really detection.The power detection device can be used for quality and fault detection.
The detecting circuit includes: in one of the embodiments,
First detection branch, is electrically connected with the first end and the data processing equipment respectively, and is located at described first
Between end and the data processing equipment, for carrying out detection to forward signal；And
Second detection branch, is electrically connected with the second end and the data processing equipment respectively, and is located at described second
Between end and the data processing equipment, for carrying out detection to reflection signal.
In one of the embodiments, further include signal amplification circuit, is electrically connected with the first end, it is to be measured for amplifying
Signal is simultaneously supplied to the protection circuit.
The signal amplification circuit includes: in one of the embodiments,
Signal amplifies branch, for receiving measured signal and amplifying；And
Signal rectification branch amplifies branch with the signal respectively and the first end is electrically connected, and is located at the signal
Amplify between branch and the first end, for amplified measured signal to be rectified into all the way.
Signal amplification branch includes two power amplifiers in one of the embodiments, respectively with the signal
Rectify branch electrical connection.
The signal rectification branch includes electric bridge in one of the embodiments, respectively with described two power amplifiers
It is electrically connected with the first end, between described two power amplifiers and the first end, for two paths of signals to be combined into
It is supplied to the protection circuit afterwards all the way.
The first detection branch carries out 30dB letter by coupler and the first end in one of the embodiments,
Number coupling.
The second detection branch carries out 30dB letter by coupler and the second end in one of the embodiments,
Number coupling.
The protection circuit includes circulator in one of the embodiments, and the input terminal of the circulator is described the
The isolation end of one end, the circulator is the second end, and passes through resistance eutral grounding.
The protection circuit further includes third end in one of the embodiments, and the third end is the circulator
Output end is carried with negative electricity and is connected, for exporting measured signal.
In above-described embodiment, by the way that the first detection branch and the second detection branch is arranged, it can treat respectively
The forward signal and reflection signal for surveying signal are rectified and are filtered.The first detection branch and the second detection branch
Being arranged can prepare for the power of detection measured signal.It, can be to measured signal by the way that the signal amplification circuit is arranged
It amplifies, can be conducive to subsequent to forward signal and reflection signal detection to measured signal first before detection.The letter
Number amplification branch and the signal rectification branch can sequence be handled to measured signal.The first detection branch with it is described
First end is coupled by 30dB, and the second detection branch is coupled with the second end 30dB can guarantee in first detection
Influence to original measured signal is smaller in the case that branch samples signal with the second detection branch.By using
The circulator can protect described two power amplifiers not damage because reflection power is excessive when load contact is bad
It is bad.Forward signal and reflection signal can be measured respectively simultaneously, to realize power detection to measured signal.
Detailed description of the invention
Fig. 1 is that a kind of power detection device provided by the embodiments of the present application is electrically connected schematic diagram；
Fig. 2 is a kind of detecting circuit input provided by the embodiments of the present application and output power correspondence diagram；
Fig. 3 is that another power detection device provided by the embodiments of the present application is electrically connected schematic diagram；
Fig. 4 is a kind of power detection device partial circuit diagram provided by the embodiments of the present application；
Fig. 5 is that another power detection device provided by the embodiments of the present application is electrically connected schematic diagram.
Drawing reference numeral explanation
100 power detection devices
10 protection circuits
110 first ends
120 second ends
130 circulators
140 third ends
20 detecting circuits
210 first detection branches
220 second detection branches
30 data processing equipments
40 signal amplification circuits
410 signals amplify branch
411 power amplifiers
420 signal rectification branches
421 electric bridges
Specific embodiment
In order to make the above objects, features, and advantages of the present application more apparent, with reference to the accompanying drawing to the application
Specific embodiment be described in detail.Many details are explained in the following description in order to fully understand this Shen
Please.But the application can be implemented with being much different from other way described herein, those skilled in the art can be not
Similar improvement is done in the case where violating the application intension, therefore the application is not limited by following public specific implementation.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all technical and scientific terms used herein and the technical field for belonging to the application
The normally understood meaning of technical staff is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
Referring to Figure 1, the application provides a kind of power detection device 100.The power detection device 100 includes protection electricity
Road 10, detecting circuit 20 and data processing equipment 30.The protection circuit 10 includes first end 110 and second end 120.It is described
First end 110 is for receiving measured signal.The second end 120 is grounded, for preventing load reflection power excessive.The detection
Circuit 20 is electrically connected with the first end 110 and the second end 120 respectively, for sampling measured signal, and by pulse to be measured
Signal is converted into direct current signal.The data processing equipment 30 is electrically connected with the detecting circuit 20, for receiving the detection
The output signal of circuit 20 and the power for calculating measured signal.
The protection circuit 10 is used to loosen in load or device will not be because of in protection circuit when poor contact
Reflection power is excessive and damages.The protection circuit 10 can provide protection according to the threshold value of setting.The threshold value is most
Big output power.In the case where loading normal work, after the first end 110 of the measured signal by the protection circuit 10
The load is output to through the protection circuit 10.When the load occur loosening or poor contact when, it is described negative
It carries and generates a reflection signal.The reflection signal is through the protection circuit 10, from the second end of the protection circuit 10
It is grounded after 120.To occur loosening in load electrical connection or in the case where poor contact to the progress of other parts circuit
Protection.In one embodiment, the load is antenna.The protection circuit 10 can be when occurring pair situations such as poor contact
Other circuits and device are protected.
Please also refer to Fig. 2, the first end 110 and described second of the detecting circuit 20 in the protection circuit 10
End 120 samples the forward signal and reflection signal of measured signal respectively.And the forward signal and reflection signal are rectified,
Filtering and amplification.Measured signal can be rectified into stable direct current after the detecting circuit 20 processing by pulsed RF signals
Signal, for the power detection of the measured signal.The detecting circuit 20 can by formula P=(Vrms-0.9)/
0.06+27.5 carries out signal conversion.
The data processing equipment 30 is electrically connected with the detecting circuit 20.The forward signal and the reverse signal are whole
It flows to input the data processing equipment 30 after direct current signal.The data processing equipment 30 handles input signal, real
Now power detection to measured signal.It is appreciated that the data processing equipment 30 can be inputted according to the detecting circuit 20
Signal to the data processing equipment 30 carries out feedback regulation to the measured signal of input, guarantees that measured signal passes through the function
Normal output after rate detection device 100.
The power detection device 100 can prevent from reflecting under load damaged condition by the way that the protection circuit 10 is arranged
Device failure caused by power is excessive.The first end 110 of the detecting circuit 20 and the protection circuit 10 and described the
The electrical connection of two ends 120 reflection signal to forward signal can carry out detection respectively, thus by the forward signal of impulse form and
Reflection signal rectification is filtered into direct current signal.The measured signal is being transferred into the data after the detecting circuit 20
Processing unit 30 can realize function to measured signal under the premise of not influencing the 10 output end power of protection circuit and impedance
Rate is detected.It is appreciated that since the output power can be used as the test stone of quality, the power detection device
100 can be used for whether detecting instrument reaches standard.The power detection device 100 can be carried out by detection output power
Fault detection.The output power can be used as one of standard of fault detection.
Please also refer to Fig. 3-Fig. 4, in one embodiment, the detecting circuit 20 include the first detection branch 210 with
Second detection branch 220.The first detection branch 210 is electric with the first end 110 and the data processing equipment 30 respectively
Connection, and between the first end 110 and the data processing equipment 30, for carrying out detection to forward signal.It is described
Second detection branch 220 is electrically connected with the second end 120 and the data processing equipment 30 respectively, and is located at described second
Between end 120 and the data processing equipment 30, for carrying out detection to reflection signal.By the way that the first detection branch is arranged
Road 210 and the second detection branch 220, can forward signal respectively to measured signal and reflection signal rectified, filtered
Wave and amplification.Pulsed RF signals can be rectified into stable direct current signal, for the power of the measured signal is examined
It surveys.The first detection branch 210 and the second detection branch 220 treated signal the is supplied to data processing dress
30 are set, is handled by the data processing equipment 30, to complete power detection to measured signal.Wherein, first device in Fig. 4
The design parameter of part with no restriction, can need to be configured according to circuit.
In one embodiment, the power detection device 100 further includes signal amplification circuit 40.The signal amplification electricity
Road 40 is electrically connected with the first end 110, for amplifying measured signal and being supplied to the protection circuit 10.Due to measured signal
It can not necessarily guarantee the needs of power detection, it therefore, can be by the way that the signal amplification circuit 40 be arranged, to the letter to be measured
It is amplified to measured signal first before number detection.The setting of the signal amplification circuit 40 can to the measured signal into
Row amplification, to meet the needs of carrying out power detection to the measured signal and driving loading demand.
In one embodiment, the signal amplification circuit 40 includes signal amplification branch 410 and signal rectification branch
420.The signal amplification branch 410 is for receiving measured signal and amplifying.The signal rectification branch 420, respectively with it is described
Signal amplifies branch 410 and the first end 110 is electrically connected, and is located at signal amplification branch 410 and the first end 110
Between, for amplified measured signal to be rectified into all the way.The signal amplification branch 410 and the signal rectification branch
420 can sequentially be handled to measured signal.
Please also refer to Fig. 5, in one embodiment, the signal amplification branch 410 includes two power amplifiers
411, it is electrically connected respectively with the signal rectification branch 420.It can be to high-frequency signal by described two power amplifiers 411
It amplifies, is exported through the protection circuit 10.By using described two power amplifiers 411, it can effectively inhibit noise,
Realization amplifies to measured signal.The signal amplification branch 410 is supplied to subsequent electricity after amplifying to measured signal
Road.
In one embodiment, the signal rectification branch 420 include electric bridge 421, respectively with described two power amplifications
Device 411 and the first end 110 are electrically connected, and between described two power amplifiers 411 and the first end 110, are used for
Two paths of signals is combined into and is supplied to the protection circuit 10 afterwards all the way.
In one embodiment, the first detection branch 210 carries out 30dB letter by coupler and the first end 110
Number coupling.In one embodiment, the second detection branch 220 carries out 30dB letter by coupler and the second end 120
Number coupling.The first detection branch 210 and the second detection branch 220 are respectively described the of the protection circuit 10
One end 110 and the second end 120 sample the forward signal and reflection signal of measured signal respectively.In view of the detecting circuit
20 input reference signal, maximum input signal can be less than 10dBm.According to power detection demand, pass through first detection
When branch 210 and the second detection branch 220 sample the measured signal, power is influenced to be less than 1dBm,
10mR can be less than on output impedance influence.The first detection branch 210 is carried out by coupler and the first end 110
The coupling of 30dB signal.The second detection branch 220 carries out 30dB signal with the second end 120 by coupler and couples.On
Stating setting may further ensure that the detecting circuit 20 passes through the first detection branch 210 and the second detection branch
220, which carry out sampling time-base to the measured signal respectively, does not originally influence original measured signal.It is appreciated that the signal amplification branch
Road 410 and the signal rectification branch 420 can sequentially be handled the measured signal.The first detection branch 210
It is coupled with the first end 110 by 30dB, the second detection branch 220 is coupled with the second end 120 by 30dB can
Signal is accurately detected in the first detection branch 210 and the second detection branch 220 with being further ensured that, and right
The measured signal carries out not influencing output signal power and output signal impedance while exact power detection.
In one embodiment, the protection circuit 10 includes circulator 130.The input terminal of the circulator 130 is institute
First end 110 is stated, the isolation end of the circulator 130 is the second end 120, and passes through resistance eutral grounding.By using described
Circulator 130, can be protected when load contact is bad described two power amplifiers 411 will not because reflection power is excessive and
Damage.Forward signal and reflection signal can be measured respectively simultaneously, to realize power detection to measured signal.In
In one embodiment, the protection circuit 10 further includes third end 140, and the third end 140 is the defeated of the circulator 130
Outlet is electrically connected, for exporting measured signal with load.The first end 110 is the input terminal of the circulator 130.It is described
Second end 120 is the isolation end of the circulator 130.The third end 140 is the output end of the circulator 130.Described
One detection branch 210 carries out forward signal sampling from the first end 110.The second detection branch 220 is from the second end
120 carry out reflection signal sampling.The connection of third end 140 load.The load can be antenna, and the antenna can be 50
Ohm matrix antenna, exports for radio frequency.The output power at the third end 140 can be greater than 40dBm.
The power detection device 100 provided by the above embodiment can reduce RF energy consumption and accurately calculate defeated
Power out.Meanwhile threshold value can be arranged according to the output power in the power detection device 100.The threshold value is maximum defeated
Power out.It is appreciated that the power detection device 100 can since the output power can be used as the test stone of quality
Whether to reach standard for detecting instrument.The power detection device 100 can carry out failure inspection by detection output power
It surveys, standard one of of the output power as fault detection.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation to claim therefore cannot be interpreted as.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of power detection device characterized by comprising
It protects circuit (10), the protection circuit (10) includes first end (110) and second end (120), the first end (110)
For receiving measured signal, second end (120) ground connection, for preventing load reflection power excessive；
Detecting circuit (20) is electrically connected, for sampling letter to be measured respectively with the first end (110) and the second end (120)
Number, and direct current signal is converted by pulse signal to be measured；And
Data processing equipment (30) is electrically connected, for receiving the output of the detecting circuit (20) with the detecting circuit (20)
Signal and the power for calculating measured signal.
2. power detection device according to claim 1, which is characterized in that the detecting circuit (20) includes:
First detection branch (210), is electrically connected with the first end (110) and the data processing equipment (30), and position respectively
Between the first end (110) and the data processing equipment (30), for carrying out detection to forward signal；And
Second detection branch (220), is electrically connected with the second end (120) and the data processing equipment (30), and position respectively
Between the second end (120) and the data processing equipment (30), for carrying out detection to reflection signal.
3. power detection device according to claim 1, which is characterized in that further include signal amplification circuit (40), with institute
First end (110) electrical connection is stated, for amplifying measured signal and being supplied to the protection circuit (10).
4. power detection device according to claim 3, which is characterized in that the signal amplification circuit (40) includes:
Signal amplifies branch (410), for receiving measured signal and amplifying；And
Signal rectification branch (420) is electrically connected with signal amplification branch (410) and the first end (110) respectively, and
Between signal amplification branch (410) and the first end (110), for amplified measured signal to be rectified into one
Road.
5. power detection device according to claim 4, which is characterized in that signal amplification branch (410) includes two
A power amplifier (411) is electrically connected with the signal rectification branch (420) respectively.
6. power detection device according to claim 5, which is characterized in that the signal rectification branch (420) includes electricity
Bridge (421) is electrically connected with described two power amplifiers (411) and the first end (110) respectively, is located at described two power
Between amplifier (411) and the first end (110), the protection circuit is supplied to afterwards all the way for two paths of signals to be combined into
(10)。
7. power detection device according to claim 2, which is characterized in that the first detection branch (210) passes through coupling
Clutch carries out 30dB signal with the first end (110) and couples.
8. power detection device according to claim 2, which is characterized in that the second detection branch (220) passes through coupling
Clutch carries out 30dB signal with the second end (120) and couples.
9. power detection device according to claim 1, which is characterized in that the protection circuit (10) includes circulator
(130), the input terminal of the circulator (130) is the first end (110), and the isolation end of the circulator (130) is described
Second end (120), and pass through resistance eutral grounding.
10. power detection device according to claim 9, which is characterized in that the protection circuit (10) further includes third
It holds (140), the third end (140) is the output end of the circulator (130), is electrically connected with load, for exporting letter to be measured
Number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822213259.0U CN209562564U (en) | 2018-12-26 | 2018-12-26 | Power detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822213259.0U CN209562564U (en) | 2018-12-26 | 2018-12-26 | Power detection device |
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| Publication Number | Publication Date |
|---|---|
| CN209562564U true CN209562564U (en) | 2019-10-29 |
Family
ID=68304008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201822213259.0U Active CN209562564U (en) | 2018-12-26 | 2018-12-26 | Power detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115177843A (en) * | 2022-09-08 | 2022-10-14 | 柏斯速眠科技(深圳)有限公司 | Method and system for evaluating relaxation state of body and method and system for adjusting relaxation state of body |
-
2018
- 2018-12-26 CN CN201822213259.0U patent/CN209562564U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115177843A (en) * | 2022-09-08 | 2022-10-14 | 柏斯速眠科技(深圳)有限公司 | Method and system for evaluating relaxation state of body and method and system for adjusting relaxation state of body |
| CN115177843B (en) * | 2022-09-08 | 2023-05-23 | 柏斯速眠科技(深圳)有限公司 | Organism relaxation state assessment method, organism relaxation state assessment system, organism relaxation state adjustment method and organism relaxation state adjustment system |
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