CN216387205U - Frequency power meter with power compensation - Google Patents
Frequency power meter with power compensation Download PDFInfo
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- CN216387205U CN216387205U CN202122726588.7U CN202122726588U CN216387205U CN 216387205 U CN216387205 U CN 216387205U CN 202122726588 U CN202122726588 U CN 202122726588U CN 216387205 U CN216387205 U CN 216387205U
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Abstract
The utility model discloses a frequency power meter with power compensation, which comprises a temperature compensation circuit, a power detection circuit, a frequency detection circuit, an upper computer interface and a controller, wherein the controller is respectively and electrically connected with the temperature compensation circuit, the power detection circuit, the upper computer interface and the frequency detection circuit. The frequency power meter with the power compensation function can collect the power, the frequency and the ambient temperature of the radio-frequency signal, and transmits the power, the frequency and the ambient temperature to the controller, so that the controller can obtain the frequency value and the ambient temperature, and the power value can be compensated.
Description
Technical Field
The utility model relates to the technical field of power detection, in particular to a frequency power meter with power compensation.
Background
The power meter is a common device in the detection field and is widely applied to various military and industrial fields, but with the improvement of science and technology, people have higher and higher requirements on the precision of power detection, and the reduction of the detection error of the power meter receives more and more attention.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: a hardware circuit of a frequency power meter with power compensation is provided, which can provide environment values of power, frequency and environment temperature for an input device as compensation basis.
In order to solve the technical problems, the utility model adopts the technical scheme that: the utility model provides a frequency power meter with power compensation, includes temperature compensation circuit, power detection circuit, frequency detection circuit, host computer interface and controller, temperature compensation circuit, power detection circuit, host computer interface and frequency detection circuit are connected respectively to the controller electricity.
Furthermore, the power detection circuit comprises a detection isolation circuit, a signal conditioning circuit, a high-speed acquisition circuit and a data storage circuit which are connected in sequence, and the controller is electrically connected with the detection isolation circuit, the signal conditioning circuit, the high-speed acquisition circuit and the data storage circuit respectively.
The signal conditioning circuit comprises a first amplifying circuit, a single-end to differential circuit, a second amplifying circuit, a third amplifying circuit, a first relay, a second relay, a third relay and a relay controller, wherein the first relay controls whether the input of the signal conditioning circuit is sent to the differential amplifier through the first amplifying circuit, the second relay controls whether the differential signal output of the single-end to differential circuit is sent to the second amplifying circuit and the third amplifying circuit respectively, the third relay controls whether the output of the second amplifying circuit and the output of the third amplifying circuit are used as the output of the signal conditioning circuit, and the relay controller controls the work of the first controller, the second controller and the third controller.
And the power supply circuit is electrically connected with the temperature compensation circuit, the power detection circuit, the frequency detection circuit and the controller respectively.
Furthermore, the power supply circuit is electrically connected with the upper computer interface to get electricity.
Furthermore, the frequency detection circuit comprises a frequency division circuit, a counting circuit, a channel selection circuit and a channel control circuit which are connected in sequence, and the controller is electrically connected with the frequency division circuit, the counting circuit, the channel selection circuit and the channel control circuit.
Further, the frequency dividing circuit comprises a low-frequency dividing module and a high-frequency dividing module.
Further, the upper computer interface is a PC104 interface.
The utility model has the beneficial effects that: a frequency power meter with power compensation can collect power, frequency and ambient temperature values of radio frequency signals, and transmit the power, frequency and ambient temperature values to a controller, so that the controller can obtain the frequency values and the ambient temperature values, and the power values can be compensated.
Drawings
Fig. 1 is a schematic structural block diagram of a frequency power meter with power compensation according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a detector isolation circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a signal amplifying circuit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a single-ended to differential circuit according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an input switching circuit of a programmable amplifier according to an embodiment of the present invention;
fig. 6 is a schematic diagram of an output switching circuit of a programmable amplifier according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a control circuit of the signal conditioning circuit according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a programmable amplifying circuit according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a main circuit of a high-speed sampling circuit according to an embodiment of the present invention;
FIG. 10 is a diagram of a clock generation circuit of a high-speed sampling circuit according to an embodiment of the present invention;
FIG. 11 is a diagram of a clock conversion circuit of the high-speed sampling circuit according to an embodiment of the present invention;
FIG. 12 is a schematic diagram of a differential clock generation circuit of a high-speed sampling circuit according to an embodiment of the present invention;
fig. 13 is a schematic diagram of a low frequency divider module circuit according to an embodiment of the present invention;
fig. 14 is a schematic diagram of a high-frequency division module circuit according to an embodiment of the present invention.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 2 to 14, a frequency power meter with power compensation includes a temperature compensation circuit, a power detection circuit, a frequency detection circuit, an upper computer interface and a controller, wherein the controller is electrically connected to the temperature compensation circuit, the power detection circuit, the upper computer interface and the frequency detection circuit, respectively.
As can be seen from the above description, the beneficial effects of the present invention are: a frequency power meter with power compensation can collect power, frequency and ambient temperature values of radio frequency signals, and transmit the power, frequency and ambient temperature values to a controller, so that the controller can obtain the frequency values and the ambient temperature values, and the power values can be compensated.
Furthermore, the power detection circuit comprises a detection isolation circuit, a signal conditioning circuit, a high-speed acquisition circuit and a data storage circuit which are connected in sequence, and the controller is electrically connected with the detection isolation circuit, the signal conditioning circuit, the high-speed acquisition circuit and the data storage circuit respectively.
As can be seen from the above description, the detection isolation circuit is used for detecting an input rf signal, outputting a low-frequency voltage signal, and isolating and amplifying the low-frequency voltage signal; the signal conditioning circuit is used for amplifying, filtering and converting the detection voltage signal after isolation and amplification; the high-speed acquisition circuit performs high-speed and high-precision sampling on the signal voltage and converts the signal voltage into a discrete digital signal for output; the data storage circuit stores the sampled discrete signals into the RAM for calling and processing, so that a high-precision power detection circuit is formed, and high-precision power detection signals can be detected.
The signal conditioning circuit comprises a first amplifying circuit, a single-end to differential circuit, a second amplifying circuit, a third amplifying circuit, a first relay, a second relay, a third relay and a relay controller, wherein the first relay controls whether the input of the signal conditioning circuit is sent to the differential amplifier through the first amplifying circuit, the second relay controls whether the differential signal output of the single-end to differential circuit is sent to the second amplifying circuit and the third amplifying circuit respectively, the third relay controls whether the output of the second amplifying circuit and the output of the third amplifying circuit are used as the output of the signal conditioning circuit, and the relay controller controls the work of the first controller, the second controller and the third controller.
From the above description, the first, second and third amplifying circuits can ensure that the output signal can meet the requirement of subsequent detection.
And the power supply circuit is electrically connected with the temperature compensation circuit, the power detection circuit, the frequency detection circuit and the controller respectively.
From the above description, the power supply circuit is used for converting the power supply voltage, so that the range of the selection of each device can be increased, and the detection accuracy of the frequency power meter is improved.
Furthermore, the power supply circuit is electrically connected with the upper computer interface to get electricity.
As can be seen from the above description, the power circuit takes power from the upper computer interface, and an independent power interface or a battery is not required to be arranged.
Furthermore, the frequency detection circuit comprises a frequency division circuit, a counting circuit, a channel selection circuit and a channel control circuit which are connected in sequence, and the controller is electrically connected with the frequency division circuit, the counting circuit, the channel selection circuit and the channel control circuit.
As can be seen from the above description, the frequency dividing circuit divides the frequency of the radio frequency signal into a lower frequency signal for counting; the counting circuit measures the frequency of the signal by counting. The method is favorable for quickly obtaining high-precision frequency signals.
Further, the frequency dividing circuit comprises a low-frequency dividing module and a high-frequency dividing module.
As can be seen from the above description, the frequency dividing circuit is divided into a low frequency dividing module and a high frequency dividing module, so as to be more suitable for various frequencies.
Further, the upper computer interface is a PC104 interface.
As can be seen from the above description, the PC104 interface is suitable for connection with industrial equipment or military equipment, and has the advantages of high expandability and high reliability.
The utility model is suitable for detecting the power and the frequency of signals, in particular to the power and the frequency of radio frequency signals of various industrial and military equipment.
The first embodiment of the utility model is as follows:
referring to fig. 1, a frequency power meter with power compensation includes a power detection circuit, a power circuit, a temperature compensation circuit, a frequency detection circuit, a controller and a PC104 interface as an interface of an upper computer, wherein the power circuit is electrically connected to the power detection circuit, the temperature compensation circuit, the frequency detection circuit and the controller, and the controller is electrically connected to the temperature compensation circuit, the power detection circuit, the interface of the upper computer and the frequency detection circuit.
The temperature compensation circuit comprises a temperature sensor which is electrically connected with the controller so as to output a temperature detection signal to compensate the detection frequency of the frequency detection circuit and the temperature of the temperature detection circuit.
The power detection circuit comprises a detection isolation circuit, a signal conditioning circuit, a high-speed acquisition circuit and a data storage circuit which are sequentially connected, and further comprises a power test FPGA main control circuit, the frequency detection circuit comprises a frequency division circuit, a counting circuit, a channel selection circuit and a channel control circuit which are sequentially connected, and further comprises the power test FPGA main control circuit.
The detection isolation circuit is used for detecting an input radio frequency signal, outputting a low-frequency voltage signal and carrying out isolation amplification on the low-frequency voltage signal; the signal conditioning circuit is used for amplifying, filtering and converting the detection voltage signal after isolation and amplification; the AD acquisition circuit samples the signal voltage at high speed and high precision and converts the signal voltage into a discrete digital signal to be output; the data storage circuit stores the sampled discrete signals into an RAM for calling and processing;
the frequency dividing circuit divides the frequency of the radio frequency signal into a signal with lower frequency so as to facilitate counting; the counting circuit measures the frequency of the signal by counting; the controller is used for carrying out logic control including timing signal generation, address decoding and various read-write control on the functional circuit of the whole power frequency meter card;
the PC104 interface circuit provides a basic power supply, is in charge of communication with a PC104 bus of the upper computer, receives data sent by the upper computer and sends the sampled data to the upper computer; the power supply circuit generates various DC power supply voltages required by the circuit by converting the basic power supply.
Specifically, as shown in fig. 2, the detection isolation circuit inputs a radio frequency signal from a socket J4 of SMA, and sends the radio frequency signal to a diode probe D0 for envelope detection, and the detected low frequency signal is sent to a chip U9 of model AD8065 for operation, isolation and amplification to output a signal AIN 0. Diodes D5 and D6 are connected between the cathode of diode D0 and ground to act as voltage limiting protection diodes, and capacitors C45 and C50 are filter capacitors.
3-8, the AIN0 signal output by the detection isolation circuit is sent to an amplifier U15 for amplification, the signal amplified by U15 is sent to a single-ended to differential amplifier U3, and differential signals 38OUT + and 38 OUT-are output. The relay K1 is used for controlling whether the AIN0 is amplified through the U15, if the signal voltage is enough, the signal can be directly sent to the U3 for differential amplification without amplification, and the signals 38OUT + and 38 OUT-output by the U3 are sent to the programmable amplifier U5 for further amplification. Similarly, relays K2 and K3 control whether the signals pass through the program-controlled amplifier U5, and if the signals do not need to be amplified, the INH and INL differential signals are directly output to the AD sampling circuit through the relays. The relays K1, K2 and K3 are controlled by the U1, and control signals of the U1 and the programmable amplifier U5 are generated by the controller.
9-12, the differential signals INH and INL output by the signal adjusting circuit are sent to the input end of a high-speed sampling chip U4 for sampling, a clock chip U2 generates a 100MHz clock, and the clock is converted by a chip U10 and a coil T1 to generate a differential clock pair ENC required by the sampling chip. And after the U4 finishes sampling, outputting 14-bit precision digital signals RAM _ DATA 0-RAM _ DATA13 to the DATA storage circuit and the FPGA main control chip U15, wherein control signals of the sampling chip are generated by the controller.
The data storage circuit mainly comprises a RAM memory chip U14, and all control signals of U14 are generated by a controller.
The frequency dividing circuit is divided into two modules, wherein one high-frequency dividing module is used for dividing the frequency of a signal with higher frequency (more than 1GHz), and the other low-frequency dividing module is used for dividing the frequency of a signal with lower frequency (less than 1 GHz).
As shown in fig. 13, the low-frequency division module mainly comprises three frequency division chips D11, D12, and D13, wherein D13 realizes the first-stage frequency division, obtains a signal FX0, sends the signal to the controller for counting, and selects and controls channels according to the counting result; d11 and D12 implement the second stage of frequency division to obtain signal FX1, which is sent to the controller for counting, judgment and channel control.
As shown in fig. 14, the high frequency division module mainly comprises an amplifier U27 AD8561 and a frequency divider SCH1, and since the high frequency signal is attenuated greatly, the high frequency signal is amplified by U27 and then sent to SCH1 for frequency division processing, and a generated signal FX2 is sent to the FPGA for counting and channel processing control.
In summary, according to the power compensation method and the frequency power meter with power compensation provided by the utility model, the detection frequency and the detection power are compensated by using the temperature value, the power value is further compensated according to the compensated detection frequency value and the compensated detection power value, and finally the detection power is finally compensated by using the thrice lagrange interpolation method to obtain the final power value, so that the detection precision of the frequency power meter is effectively improved, and the high-precision frequency power meter is obtained.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (8)
1. A frequency power meter with power compensation, characterized by: the device comprises a temperature compensation circuit, a power detection circuit, a frequency detection circuit, an upper computer interface and a controller, wherein the controller is electrically connected with the temperature compensation circuit, the power detection circuit, the upper computer interface and the frequency detection circuit respectively.
2. A frequency power meter with power compensation in accordance with claim 1, wherein: the power detection circuit comprises a detection isolation circuit, a signal conditioning circuit, a high-speed acquisition circuit and a data storage circuit which are sequentially connected, and the controller is respectively and electrically connected with the detection isolation circuit, the signal conditioning circuit, the high-speed acquisition circuit and the data storage circuit.
3. A frequency power meter with power compensation in accordance with claim 2, wherein: the signal conditioning circuit comprises a first amplifying circuit, a single-end to differential circuit, a second amplifying circuit, a third amplifying circuit, a first relay, a second relay, a third relay and a relay controller, wherein the first relay controls whether the input of the signal conditioning circuit is sent to the differential amplifier through the first amplifying circuit, the second relay controls whether the differential signal output of the single-end to differential circuit is sent to the second amplifying circuit and the third amplifying circuit respectively, the third relay controls whether the output of the second amplifying circuit and the output of the third amplifying circuit are used as the output of the signal conditioning circuit, and the relay controller controls the work of the first controller, the second controller and the third controller.
4. A frequency power meter with power compensation in accordance with claim 1, wherein: the power supply circuit is electrically connected with the temperature compensation circuit, the power detection circuit, the frequency detection circuit and the controller respectively.
5. The frequency power meter with power compensation of claim 4, wherein: the power circuit is electrically connected with the upper computer interface to get electricity.
6. A frequency power meter with power compensation in accordance with claim 1, wherein: the frequency detection circuit comprises a frequency division circuit, a counting circuit, a channel selection circuit and a channel control circuit which are connected in sequence, and the controller is electrically connected with the frequency division circuit, the counting circuit, the channel selection circuit and the channel control circuit.
7. The frequency power meter with power compensation of claim 6, wherein: the frequency division circuit comprises a low-frequency division module and a high-frequency division module.
8. A frequency power meter with power compensation in accordance with claim 7, wherein: the upper computer interface is a PC104 interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122726588.7U CN216387205U (en) | 2021-11-09 | 2021-11-09 | Frequency power meter with power compensation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122726588.7U CN216387205U (en) | 2021-11-09 | 2021-11-09 | Frequency power meter with power compensation |
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| CN216387205U true CN216387205U (en) | 2022-04-26 |
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| CN202122726588.7U Active CN216387205U (en) | 2021-11-09 | 2021-11-09 | Frequency power meter with power compensation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113960360A (en) * | 2021-11-09 | 2022-01-21 | 阳光学院 | Power compensation method and frequency power meter with power compensation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113960360A (en) * | 2021-11-09 | 2022-01-21 | 阳光学院 | Power compensation method and frequency power meter with power compensation |
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Inventor after: Luo Xianquan Inventor after: Zhong Chen Inventor after: Shan Chengjin Inventor before: Luo Xianquan Inventor before: Zhong Chen Inventor before: Shan Chengjin Inventor before: Ma Juntao Inventor before: Lv Guizhou |
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