CN210578504U - Power output and modulation degree detection circuit of airborne transmitter - Google Patents
Power output and modulation degree detection circuit of airborne transmitter Download PDFInfo
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- CN210578504U CN210578504U CN201922057572.4U CN201922057572U CN210578504U CN 210578504 U CN210578504 U CN 210578504U CN 201922057572 U CN201922057572 U CN 201922057572U CN 210578504 U CN210578504 U CN 210578504U
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Abstract
The utility model discloses a power output and modulation degree detection circuit of an airborne transmitter, which comprises a protection circuit, a matching circuit, a filter circuit, an envelope detection circuit, a power detection circuit and a singlechip; the protection circuit input end receives an amplitude modulation signal to be detected, the protection circuit output end is connected with the matching circuit, the matching circuit output end is connected with the filter circuit, the filter circuit output end is connected with the envelope detection circuit, the envelope detection circuit output end is connected with the power detection circuit and the single chip microcomputer, the power detection circuit output end is connected with the single chip microcomputer, and the single chip microcomputer outputs a detected power value and a detected modulation value. The large signal input protection function is achieved; the modulation degree and the power relative value of the input signal can be rapidly detected.
Description
Technical Field
The utility model belongs to the electronic communication field mainly relates to an airborne transmitter power output and modulation degree detection circuitry, mainly is applied to in the high-power signal transmitting system of aircraft delivery.
Background
In the technical field of electronic communication, the output power of a transmitter and the modulation degree of a signal can be changed to different degrees along with the self heating or the change of the environmental temperature during the operation of the transmitter, and at this time, the signal power and the modulation degree actually output by the transmitter need to be detected to correct related parameters to maintain the stability of the operation of the transmitter, ensure the power stability of the output signal and ensure the undistorted signal quality. Especially, the airborne high-power transmitter has a large influence on the electromagnetic compatibility of the whole machine, and the stability of the output power is very important to ensure. The utility model relates to an airborne transmitter power output and modulation degree detection circuitry is exactly used for realizing above-mentioned function.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an airborne transmitter power output and modulation degree detection circuitry.
The utility model discloses an implement through following technical scheme, its characterized in that: the device comprises a protection circuit, a matching circuit, a filter circuit, an envelope detection circuit, a power detection circuit and a single chip microcomputer; the protection circuit input end receives an amplitude modulation signal to be detected, the protection circuit output end is connected with the matching circuit, the matching circuit output end is connected with the filter circuit, the filter circuit output end is connected with the envelope detection circuit, the envelope detection circuit output end is connected with the power detection circuit and the single chip microcomputer, the power detection circuit output end is connected with the single chip microcomputer, and the single chip microcomputer outputs a detected power value and a detected modulation value. The protection circuit consists of diodes D1, D2, D3, D4 and D5. The matching circuit is composed of a pi-type circuit with equivalent impedance of 50 omega, which is composed of R10, R11 and R5. The filter circuit is composed of L1, C3, C8, L4, C4 and C9. The envelope detection circuit is mainly composed of a detection diode VD1 and an operational amplifier N1, and comprises related peripheral circuits. The power detection circuit is composed of an operational amplifier N2 and relevant peripheral circuits. The single chip microcomputer is STM32H743ZIT 6. The modulation degree and the power value output by the single chip microcomputer are analog quantity or digital quantity, the analog quantity realizes analog output through a DA converter in the single chip microcomputer, and the digital quantity can realize RS232 serial port data or SPI data output according to different interface protocols.
The utility model discloses has following effect: the large signal input protection function is achieved; the modulation degree and the power relative value of the input signal can be rapidly detected.
Drawings
Fig. 1 is a block diagram illustrating a power output and modulation degree detection circuit of an onboard transmitter according to the present invention; fig. 2 is a partial circuit diagram of the power output and modulation degree detection circuit of an airborne transmitter according to the present invention.
Description of the drawings: 1. the device comprises a protection circuit, 2, a matching circuit, 3, a filter circuit, 4, an envelope detection circuit, 5, a power detection circuit, 6 and a singlechip.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
As shown in fig. 1, the circuit comprises a protection circuit 1, a matching circuit 2, a filter circuit 3, an envelope detection circuit 4, a power detection circuit 5 and a single chip microcomputer 6. The protection circuit input end receives an amplitude modulation signal to be detected, the protection circuit output end is connected with the matching circuit, the matching circuit output end is connected with the filter circuit, the filter circuit output end is connected with the envelope detection circuit, the envelope detection circuit output end is connected with the power detection circuit and the single chip microcomputer, the power detection circuit output end is connected with the single chip microcomputer, and the single chip microcomputer outputs a detected power value and a detected modulation value.
As shown in fig. 2, the input end of the protection circuit receives an amplitude-modulated signal to be detected, the protection circuit mainly comprises diodes D1, D2, D3, D4 and D5, and when the amplitude of the input signal is too large, the diodes in the protection circuit are turned on to conduct the input large signal to the ground, so as to avoid the large signal from affecting subsequent circuits. The protection circuit does not have any influence on the normal detected amplitude-modulated signal.
As shown in fig. 2, the matching circuit mainly includes a pi-type matching circuit having an equivalent impedance of 50 Ω formed by R10, R11, and R5, and performs impedance matching on an input amplitude-modulated signal to reduce loss of the input signal.
As shown in fig. 2, the filter circuit mainly includes an LC filter circuit composed of L1, C3, C8, L4, C4, and C9, and filters interference signals such as noise and harmonic in the signal, thereby ensuring reliable results of subsequent acquisition.
As shown in fig. 2, the envelope detection circuit mainly comprises a detector diode VD1 and an operational amplifier N1, and detects an envelope signal containing power direct current in a signal, and outputs the signal to the single chip microcomputer and the power detection circuit after the signal is appropriately amplified.
As shown in fig. 2, the power detection circuit mainly comprises an operational amplifier N2, and the power detection circuit detects the power in the envelope signal and outputs the power to the single chip microcomputer.
As shown in fig. 2, the single chip microcomputer is an STM32H743ZIT6, an AD sampling function in the single chip microcomputer is used for AD sampling an input envelope signal and a power direct-current signal, a modulation degree and a power value are calculated according to a sampling result and a related calculation method, and the modulation degree and the power value are output by using a corresponding port according to application environment requirements, the modulation degree and the power value may be an analog quantity or a digital quantity, the analog quantity realizes analog output through a DA converter in the single chip microcomputer, and the digital quantity realizes RS232 serial port data or SPI data output according to different interface protocols.
This technical scheme provides an airborne transmitter power output and modulation degree detection circuitry, contains: the circuit comprises a protection circuit, a matching circuit, a filter circuit, an envelope detection circuit, a power detection circuit and a single chip microcomputer. The method is mainly applied to the field of airborne high-power communication. The power and the modulation degree of the output signal of the airborne transmitter are detected through the circuit, an important reference basis can be provided for the transmitter to correct the working parameters, and the stability of the power of the output signal of the transmitter is ensured.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected, and may communicate between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Claims (8)
1. An airborne transmitter power output and modulation degree detection circuit, characterized by: the device comprises a protection circuit, a matching circuit, a filter circuit, an envelope detection circuit, a power detection circuit and a single chip microcomputer; the protection circuit input end receives an amplitude modulation signal to be detected, the protection circuit output end is connected with the matching circuit, the matching circuit output end is connected with the filter circuit, the filter circuit output end is connected with the envelope detection circuit, the envelope detection circuit output end is connected with the power detection circuit and the single chip microcomputer, the power detection circuit output end is connected with the single chip microcomputer, and the single chip microcomputer outputs a detected power value and a detected modulation value.
2. The on-board transmitter power output and modulation degree detection circuit of claim 1, wherein: the protection circuit consists of diodes D1, D2, D3, D4 and D5.
3. The on-board transmitter power output and modulation degree detection circuit of claim 1, wherein: the matching circuit is composed of a pi-type circuit with equivalent impedance of 50 omega, which is composed of R10, R11 and R5.
4. The on-board transmitter power output and modulation degree detection circuit of claim 1, wherein: the filter circuit is composed of L1, C3, C8, L4, C4 and C9.
5. The on-board transmitter power output and modulation degree detection circuit of claim 1, wherein: the envelope detection circuit is mainly composed of a detection diode VD1 and an operational amplifier N1, and comprises related peripheral circuits.
6. The on-board transmitter power output and modulation degree detection circuit of claim 1, wherein: the power detection circuit is composed of an operational amplifier N2 and relevant peripheral circuits.
7. The on-board transmitter power output and modulation degree detection circuit of claim 1, wherein: the single chip microcomputer is STM32H743ZIT 6.
8. The on-board transmitter power output and modulation degree detection circuit of claim 1, wherein: the modulation degree and the power value output by the single chip microcomputer are analog quantity or digital quantity, the analog quantity realizes analog output through a DA converter in the single chip microcomputer, and the digital quantity can realize RS232 serial port data or SPI data output according to different interface protocols.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922057572.4U CN210578504U (en) | 2019-11-26 | 2019-11-26 | Power output and modulation degree detection circuit of airborne transmitter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922057572.4U CN210578504U (en) | 2019-11-26 | 2019-11-26 | Power output and modulation degree detection circuit of airborne transmitter |
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| CN210578504U true CN210578504U (en) | 2020-05-19 |
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| CN201922057572.4U Active CN210578504U (en) | 2019-11-26 | 2019-11-26 | Power output and modulation degree detection circuit of airborne transmitter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110808747A (en) * | 2019-11-26 | 2020-02-18 | 中兵通信科技股份有限公司 | Power output and modulation degree detection circuit of airborne transmitter |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110808747A (en) * | 2019-11-26 | 2020-02-18 | 中兵通信科技股份有限公司 | Power output and modulation degree detection circuit of airborne transmitter |
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