An omnidirectional beacon monitoring system for VHF antenna

Abstract

The present invention proposes an omnidirectional beacon monitoring system for a very high frequency antenna, comprising a signal receiving module, a filtering and amplifying module, a detection module, a main control module, a display module, a storage module, an oscillation module and a signal sending module; the output end of the signal receiving module is connected to the input end of the filtering and amplifying module, the output end of the filtering and amplifying module is connected to the input end of the detection module to send the signal to the detection module for signal detection, the output end of the detection module is connected to the input end of the main control module to feed back the detected signal to the main control module, the output end of the main control module is also connected to the input end of the oscillation module, the output end of the oscillation module is connected to the input end of the signal sending module, the signal sent by the main control module reaches the signal sending module through the oscillation module and is sent out. The present invention has the advantages of simple structure, high monitoring accuracy, strong anti-interference and simple structure, and meets the needs of enterprises for omnidirectional beacon signal monitoring.

Description

Technical Field

[0001] The invention relates to the technical field of communication monitoring, and in particular to an omnidirectional beacon monitoring system of a very high frequency antenna. Background Art

[0002] In recent years, with the rapid development of the aviation industry, many navigation technologies have been applied to the aviation field. VHF omnidirectional beacons have the advantages of low cost and multiple routes, and are widely used in aviation radio navigation systems. Omnidirectional beacons work in conjunction with airborne navigation receivers to provide azimuth information to aircraft in an all-round and uninterrupted manner, guiding the aircraft to return along the predetermined route. Existing VHF omnidirectional beacon equipment usually includes power supply systems, transmitter systems, monitoring systems, and antenna systems. In actual applications, the equipment is greatly affected by environmental factors and has a high failure rate. When hardware equipment such as the receiving unit antenna fails, the received signal is lost or intermittent, causing interference to the navigation task. The monitoring system in the existing technology is also affected by the environment and often has problems such as poor signal monitoring accuracy, weak signal monitoring, more signal interference, and unstable signal monitoring. Summary of the invention

[0003] The object of the present invention is to solve at least one of the technical drawbacks.

[0004] To this end, an object of the present invention is to propose an omnidirectional beacon monitoring system for a very high frequency antenna, comprising a signal receiving module, a filtering and amplifying module, a detection module, a main control module, a display module, a storage module, an oscillation module and a signal sending module; the output end of the signal receiving module is connected to the input end of the filtering and amplifying module, the output end of the filtering and amplifying module is connected to the input end of the detection module to send the signal to the detection module for signal detection, the output end of the detection module is connected to the input end of the main control module to feed back the detected signal to the main control module, the output end of the main control module is connected to the input end of the display module and the input end of the storage module, the output end of the main control module is also connected to the input end of the oscillation module, the output end of the oscillation module is connected to the input end of the signal sending module, and the signal sent by the main control module reaches the signal sending module through the oscillation module and is sent out.

[0005] The filtering and amplification module includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a first inductor, a second inductor, a first amplifier, and a second amplifier; the first capacitor, the second capacitor, and the first inductor are connected in parallel, one end of which is connected in parallel to one end of the first resistor and the second resistor, and the other end of which is connected in parallel is grounded, one end of the fifth capacitor is connected to the same-direction input end of the first amplifier through the second inductor and the sixth capacitor, the other end of the first resistor is connected to the other end of the fifth capacitor, and the other end of the second resistor is connected to the same-direction input end of the first amplifier, the third resistor is connected in parallel to the fourth resistor, one end of which is connected in parallel to the other end of the fifth capacitor, and the other end of which is connected in parallel to the reverse input end of the first amplifier and one end of the seventh capacitor, the other end of the seventh capacitor is connected to the output end of the first amplifier, one end of the third capacitor, and one end of the fifth resistor, the other end of the third capacitor is grounded, the other end of the fifth resistor is connected to the same-direction input end of the second amplifier through the sixth resistor, one end of the fourth capacitor is connected to the other end of the fifth resistor, and the other end of the fourth capacitor is connected to the output end of the second amplifier.

[0006] Preferably, the detection module includes a first polar capacitor, a second polar capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a first triode, a second triode, a third triode, a third inductor, a fourth inductor, and a third operational amplifier; the signal input end of the detection module is connected to the positive electrode of the first polar capacitor and the positive electrode of the second polar capacitor, the negative electrode of the first polar capacitor is connected to the positive electrode of the first diode, the negative electrode of the second polar capacitor is connected to the positive electrode of the second diode, one end of the seventeenth resistor is connected to the first diode and the negative electrode of the second diode, the other end of the seventeenth resistor is connected to the negative electrode of the fifth diode and the positive electrode of the fourth diode, the negative electrode of the fourth diode is connected to one end of the thirteenth resistor, one end of the eleventh capacitor, and the positive electrode of the second triode The collector of the first transistor is connected, the base of the second transistor is connected to one end of the fourteenth resistor and one end of the twelfth capacitor, the other end of the twelfth capacitor is connected to the non-inverting input terminal of the third operational amplifier, the emitter of the second transistor is connected to the non-inverting input terminal of the third operational amplifier through the fifteenth resistor, the eighth capacitor is connected in parallel with the ninth resistor, one end of the parallel connection is connected to one end of the seventeenth resistor, one end of the seventh resistor and one end of the fourth inductor, the other end of the parallel connection is connected to one end of the tenth resistor and the collector of the first transistor, the base of the first transistor is connected to the other end of the fourth inductor, the emitter of the first transistor is grounded through the eighth resistor, one end of the tenth resistor is connected to one end of the ninth capacitor, one end of the tenth capacitor and one end of the eleventh resistor, the other end of the eleventh resistor is connected to the anode of the third diode and one end of the twelfth resistor, the base of the third transistor is connected to the other end of the twelfth resistor, the collector of the third transistor is connected to the cathode of the third diode and one end of the third inductor, the emitter of the third transistor is grounded, and the other end of the third inductor is connected to the reverse input terminal of the third operational amplifier through the sixteenth resistor.

[0007] In any of the above schemes, preferably, the oscillation module includes an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a sixth diode, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, a third polarized capacitor, a fourth polarized capacitor, a thirteenth capacitor and a crystal oscillator, the signal input end is connected to one end of the thirteenth capacitor and one end of the eighteenth resistor, the other end of the eighteenth resistor is connected to the base of the fourth transistor, the collector of the fourth transistor is connected to one end of the crystal oscillator and one end of the nineteenth resistor, and the other end of the crystal oscillator is connected to the positive electrode of the fourth polarized capacitor and one end of the 20th resistor The seventh triode base is connected to the other end of the twentieth resistor, the seventh triode emitter is grounded through the twenty-seventh resistor, the seventh triode collector is connected to the fifth triode collector, the other end of the nineteenth resistor is connected to one end of the twenty-second resistor and the anode of the sixth diode, the sixth triode emitter is connected to one end of the twenty-sixth resistor and the cathode of the sixth diode, and the sixth triode collector is connected to one end of the twenty-fifth resistor through the twenty-fourth resistor; the fourth triode emitter is connected to the anode of the third polar capacitor and one end of the twenty-third resistor, the fifth triode base is connected to the other end of the twenty-third resistor and one end of the twenty-fifth resistor through the twenty-first resistor, and the fifth triode emitter is connected to the cathode of the third polar capacitor.

[0008] The advantages and beneficial effects of the present invention over the prior art are as follows:

[0009] 1. The omnidirectional beacon monitoring system of a very high frequency antenna of the present invention has high signal monitoring stability, good anti-interference ability, high monitoring accuracy, and can minimize environmental interference factors. When an abnormal signal is detected, an alarm signal can be sent to the host in time, and abnormal status information can be displayed at the same time. The abnormal information and parameters of the abnormal signal are stored to facilitate maintenance of the equipment.

[0010] 2. The omnidirectional beacon monitoring system of a very high frequency antenna of the present invention has a simple structure, small size, easy installation, low power consumption, low cost, and low failure rate. Compared with other high-cost equipment, it is more suitable for the needs of enterprises and reduces more costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0012] Figure 1 A structural block diagram of an embodiment of an omnidirectional beacon monitoring system for a very high frequency antenna according to the present invention;

[0013] Figure 2A circuit schematic diagram of a filtering and amplifying module in an omnidirectional beacon monitoring system for a very high frequency antenna according to the present invention;

[0014] Figure 3 A circuit schematic diagram of a detection module in an embodiment of an omnidirectional beacon monitoring system for a very high frequency antenna according to the present invention;

[0015] Figure 4 It is a circuit schematic diagram of an oscillating module in an embodiment of an omnidirectional beacon monitoring system for a very high frequency antenna according to the present invention;

[0016] Figure 5 The figure is a schematic diagram of the circuit of a main control module in an embodiment of an omnidirectional beacon monitoring system of a very high frequency antenna according to the present invention. DETAILED DESCRIPTION

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0018] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] like Figures 1 to 4As shown, an omnidirectional beacon monitoring system of a very high frequency antenna according to an embodiment of the present invention comprises a signal receiving module 1, a filtering and amplifying module 2, a detection module 3, a main control module 4, a display module 5, a storage module 6, an oscillation module 7 and a signal sending module 8; the output end of the signal receiving module 1 is connected to the input end of the filtering and amplifying module 2, the signal receiving module 1 transmits the received signal to the filtering and amplifying module 2 for processing, the output end of the filtering and amplifying module 2 is connected to the input end of the detection module 3, the filtering and amplifying module 2 removes impurities and amplifies the signal and then transmits it to the detection module 3, so that the signal is sent to the detection module 3 for signal detection The output end of the detection module 3 is connected to the input end of the main control module 4 to feed back the detected signal to the main control module 4. The output end of the main control module 4 is connected to the input end of the display module 5 and the input end of the storage module 6. The main control module 4 transmits the signal to the display module 5 to display the front-end signal. At the same time, the signal is also transmitted to the storage module 6 to store the parameters of the signal for later maintenance. The output end of the main control module 4 is also connected to the input end of the oscillation module 7. The output end of the oscillation module 7 is connected to the input end of the signal sending module 8. The signal sent by the main control module 4 reaches the signal sending module 8 through the oscillation module 7 and is sent to the main control machine.

[0020] The filtering and amplifying module 2 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first capacitor C1, a second capacitor C2, a third capacitor C4, a fourth capacitor C5, a fifth capacitor C6, a sixth capacitor C7, a seventh capacitor C3, a first inductor L1, a second inductor L2, a first amplifier U1, and a second amplifier U2; the first capacitor C1, the second capacitor C2, and the first inductor L1 are connected in parallel, one end of which is connected in parallel to one end of the first resistor R1 and the second resistor R2, and the other end of which is connected in parallel to ground, one end of the fifth capacitor C6 is connected to the same-direction input end of the first amplifier U1 through the second inductor L2 and the sixth capacitor C7, and the other end of the first resistor R1 is connected to the other end of the fifth capacitor C6 and the input end of the filtering and amplifying module , the other end of the second resistor R2 is connected to the same-direction input end of the first amplifier U1, the third resistor R3 is connected to the fourth resistor R4 in parallel, one end of the parallel connection is connected to the other end of the fifth capacitor C6, the other end of the parallel connection is connected to the reverse input end of the first amplifier U1 and one end of the seventh capacitor C3, the other end of the seventh capacitor C3 is connected to the output end of the first amplifier U1, one end of the third capacitor C4 and one end of the fifth resistor R5, the other end of the third capacitor C4 is grounded, the other end of the fifth resistor R5 is connected to the same-direction input end of the second amplifier U2 through the sixth resistor R6, one end of the fourth capacitor C5 is connected to the other end of the fifth resistor R5, and the other end of the fourth capacitor C5 is connected to the output end of the second amplifier U2; the filtering and amplifying module 2 can denoise the signal and then amplify the denoised signal.

[0021] An omnidirectional beacon monitoring system for a very high frequency antenna in an embodiment of the present invention has high monitoring stability, good anti-interference ability, high monitoring accuracy, and can minimize environmental interference factors. When an abnormal signal is detected, an alarm signal can be sent to the host in a timely manner, and abnormal status information can be displayed at the same time. The abnormal information and parameters of the abnormal signal can be stored to facilitate maintenance of the equipment.

[0022] Specifically, the detection module 3 includes a first polar capacitor C8, a second polar capacitor C9, an eighth capacitor C10, a ninth capacitor C11, a tenth capacitor C12, an eleventh capacitor C13, a twelfth capacitor C14, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a first transistor Q1, a second transistor Q2, a third transistor Q3, a third inductor L3, a fourth inductor L4, and a third operational amplifier U3; the detection module The signal input end of block 3 is connected to the positive electrode of the first polarized capacitor C8 and the positive electrode of the second polarized capacitor C9, the negative electrode of the first polarized capacitor C8 is connected to the positive electrode of the first diode D1, the negative electrode of the second polarized capacitor C9 is connected to the positive electrode of the second diode D2, one end of the seventeenth resistor R17 is connected to the negative electrodes of the first diode D1 and the second diode D2, the other end of the seventeenth resistor R17 is connected to the negative electrode of the fifth diode D5 and the positive electrode of the fourth diode D4, the negative electrode of the fourth diode D4 is connected to one end of the thirteenth resistor R13, one end of the eleventh capacitor C13 and the collector of the second transistor Q2, the base of the second transistor Q2 is connected to one end of the fourteenth resistor R14 and one end of the twelfth capacitor C14, and the other end of the twelfth capacitor C14 is connected to the same-direction input end of the third operational amplifier U3

[0023] The emitter of the second transistor Q2 is connected to the same-direction input terminal of the third operational amplifier U3 through the fifteenth resistor R15, the eighth capacitor C10 is connected in parallel with the ninth resistor R9, one end of the parallel connection is connected to one end of the seventeenth resistor R17, one end of the seventh resistor R7 and one end of the fourth inductor L4, the other end of the parallel connection is connected to one end of the tenth resistor R10 and the collector of the first transistor Q1, the base of the first transistor Q1 is connected to the other end of the fourth inductor L4, the emitter of the first transistor Q1 is grounded through the eighth resistor R8, one end of the tenth resistor R10 is connected to one end of the ninth capacitor C11, the tenth capacitor C1 2 is connected to one end of the eleventh resistor R11, the other end of the eleventh resistor R11 is connected to the anode of the third diode D3 and one end of the twelfth resistor R12, the base of the third triode Q3 is connected to the other end of the twelfth resistor R12, the collector of the third triode Q3 is connected to the cathode of the third diode D3 and one end of the third inductor L3, the emitter of the third triode Q3 is grounded, and the other end of the third inductor L3 is connected to the reverse input end of the third operational amplifier U3 through the sixteenth resistor R16; the detection module 3 transmits the change parameter information of the signal to the main control module 4 by detecting the parameters of the waveform.

[0024] Specifically, the oscillation module 7 includes an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fourth resistor R24, a twenty-fifth resistor R25, a twenty-sixth resistor R26, a twenty-seventh resistor R27, a sixth diode D6, a fourth transistor Q4, a fifth transistor Q5, a sixth transistor Q6, a seventh transistor Q7, a third polarized capacitor C15, and a fourth transistor Q5. The fourth polar capacitor C16, the thirteenth capacitor C18 and the crystal oscillator X1, the signal input end of the oscillation module 7 is connected to one end of the thirteenth capacitor C18 and one end of the eighteenth resistor R18, the other end of the eighteenth resistor R18 is connected to the base of the fourth transistor Q4, the collector of the fourth transistor Q4 is connected to one end of the crystal oscillator X1 and one end of the nineteenth resistor R19, the other end of the crystal oscillator X1 is connected to the positive electrode of the fourth polar capacitor C16 and one end of the twentieth resistor R20, the base of the seventh transistor Q7 is connected to the twentieth transistor R8, and the collector of the fourth transistor Q4 is connected to one end of the crystal oscillator X1 and one end of the nineteenth resistor R19. The other end of the seventh transistor Q7 is connected to the ground through the twenty-seventh resistor R27, the collector of the seventh transistor Q7 is connected to the collector of the fifth transistor Q5, the other end of the nineteenth resistor R19 is connected to one end of the twenty-second resistor R22 and the positive electrode of the sixth diode D6, the emitter of the sixth transistor Q6 is connected to one end of the twenty-sixth resistor R26 and the negative electrode of the sixth diode D6, and the collector of the sixth transistor Q6 is connected to one end of the twenty-fifth resistor R25 through the twenty-fourth resistor R24; the emitter of the fourth transistor Q4 is connected to the positive electrode of the third polar capacitor C15 and one end of the twenty-third resistor R23, the base of the fifth transistor Q5 is connected to the other end of the twenty-third resistor R23 and one end of the twenty-fifth resistor R25 through the twenty-first resistor R21, the emitter of the fifth transistor Q5 is connected to the negative electrode of the third polar capacitor C15, and the oscillation module 7 processes the signal of the main control module 4 and sends it to the signal sending module 8, and the signal sending module 8 then sends it to the host.

[0025] Specifically, the main control module 4 adopts a CMX7042 chip.

[0026] The working principle of this embodiment is as follows: after receiving the signal, the signal receiving module 1 transmits the signal to the filtering and amplifying module 2; the filtering and amplifying module 2 filters and amplifies the signal and transmits it to the detection module 3; the detection module 3 transmits the detected signal parameters to the main control module 4; the main control module 4 processes the signal and displays it through the display module 5, and then transmits the signal parameter information to the storage module 6 for storage; at the same time, the main control module 4 transmits the signal information to the signal sending module 8 through the oscillation module 7; the signal sending module 8 sends the signal to the main control machine, so that the main control machine takes relevant actions after receiving the signal.

[0027] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0028] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An omnidirectional beacon monitoring system for a very high frequency antenna, characterized in that: It includes a signal receiving module, a filtering and amplifying module, a detection module, a main control module, a display module, a storage module, an oscillation module and a signal sending module; the output end of the signal receiving module is connected to the input end of the filtering and amplifying module, the output end of the filtering and amplifying module is connected to the input end of the detection module, so as to send the signal to the detection module for signal detection, the output end of the detection module is connected to the input end of the main control module, so as to feed back the detected signal to the main control module, the output end of the main control module is connected to the input end of the display module and the input end of the storage module, the output end of the main control module is also connected to the input end of the oscillation module, the output end of the oscillation module is connected to the input end of the signal sending module, and the signal sent by the main control module reaches the signal sending module through the oscillation module and is sent out; wherein: The filtering and amplifying module includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a first inductor, a second inductor, a first amplifier, and a second amplifier; the first capacitor, the second capacitor, and the first inductor are connected in parallel, one end of which is connected in parallel to one end of the first resistor and the second resistor, and the other end of which is connected in parallel to ground; one end of the fifth capacitor is connected to the same-direction input end of the first amplifier through the second inductor and the sixth capacitor; the other end of the first resistor is connected to the other end of the fifth capacitor; the other end of the second resistor is connected to the other end of the fifth capacitor. one end is connected to the non-inverting input end of the first amplifier, the third resistor is connected to the fourth resistor in parallel, one end of the parallel connection is connected to the other end of the fifth capacitor, the other end of the parallel connection is connected to the inverting input end of the first amplifier and one end of the seventh capacitor, the other end of the seventh capacitor is connected to the output end of the first amplifier, one end of the third capacitor and one end of the fifth resistor, the other end of the third capacitor is grounded, the other end of the fifth resistor is connected to the non-inverting input end of the second amplifier through the sixth resistor, one end of the fourth capacitor is connected to the other end of the fifth resistor, and the other end of the fourth capacitor is connected to the output end of the fifth capacitor of the second amplifier; The detection module includes a first polar capacitor, a second polar capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a first transistor, a second transistor, a third transistor, a third inductor, a fourth inductor, and a third operational amplifier; the signal input end of the detection module is connected to the positive electrode of the first polar capacitor and the positive electrode of the second polar capacitor, the negative electrode of the first polar capacitor is connected to the positive electrode of the first diode, the negative electrode of the second polar capacitor is connected to the positive electrode of the second diode, one end of the seventeenth resistor is connected to the first diode and the negative electrode of the second diode, the other end of the seventeenth resistor is connected to the negative electrode of the fifth diode and the positive electrode of the fourth diode, the negative electrode of the fourth diode is connected to one end of the thirteenth resistor, one end of the eleventh capacitor and the collector of the second transistor, the base of the second transistor is connected to the base of the first One end of the fourteenth resistor is connected to one end of the twelfth capacitor, the other end of the twelfth capacitor is connected to the non-inverting input end of the third operational amplifier, the emitter of the second transistor is connected to the non-inverting input end of the third operational amplifier through the fifteenth resistor, the eighth capacitor is connected in parallel with the ninth resistor, one end of the parallel connection is connected to one end of the seventeenth resistor, one end of the seventh resistor and one end of the fourth inductor, the other end of the parallel connection is connected to one end of the tenth resistor and the collector of the first transistor, the base of the first transistor is connected to one end of the fourth inductor, and the first three The emitter of the transistor is grounded through the eighth resistor, one end of the tenth resistor is connected to one end of the ninth capacitor, one end of the tenth capacitor and one end of the eleventh resistor, the other end of the eleventh resistor is connected to the anode of the third diode and one end of the twelfth resistor, the base of the third triode is connected to the other end of the twelfth resistor, the collector of the third triode is connected to the cathode of the third diode and one end of the third inductor, the emitter of the third triode is grounded, and the other end of the third inductor is connected to the reverse input end of the third operational amplifier through the sixteenth resistor; The oscillation module includes an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a sixth diode, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, a third polarized capacitor, a fourth polarized capacitor, a thirteenth capacitor and a crystal oscillator, the signal input end is connected to one end of the thirteenth capacitor and one end of the eighteenth resistor, the other end of the eighteenth resistor is connected to the base of the fourth transistor, the collector of the fourth transistor is connected to one end of the crystal oscillator and one end of the nineteenth resistor, the other end of the crystal oscillator is connected to the positive electrode of the fourth polarized capacitor and one end of the twentieth resistor, the base of the seventh transistor is connected to the other end of the twentieth resistor One end is connected, the emitter of the seventh transistor is grounded through the twenty-seventh resistor, the collector of the seventh transistor is connected to the collector of the fifth transistor, the other end of the nineteenth resistor is connected to one end of the twenty-second resistor and the anode of the sixth diode, the emitter of the sixth transistor is connected to one end of the twenty-sixth resistor and the cathode of the sixth diode, and the collector of the sixth transistor is connected to one end of the twenty-fifth resistor through the twenty-fourth resistor; the emitter of the fourth transistor is connected to the anode of the third polar capacitor and one end of the twenty-third resistor, the base of the fifth transistor is connected to the other end of the twenty-third resistor and one end of the twenty-fifth resistor through the twenty-first resistor, and the emitter of the fifth transistor is connected to the cathode of the third polar capacitor.

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