A wireless communication engineering supervision system

Abstract

This invention discloses a wireless communication engineering supervision system, including an amplitude-frequency output circuit, an amplitude distortion detection circuit, and a power adjustment circuit. When the operational amplifier AR1 outputs a positive level, the amplitude of the frequency band is detected by the charging of capacitor C1. When the operational amplifier AR1 outputs a negative level, the amplitude of the frequency band is detected by the charging of capacitor C2. When the operational amplifier AR10 outputs a positive level, it is determined that the 2FSK wireless signal has amplitude distortion. Based on the outputs of operational amplifier AR1 and AR7, a specific resistor from resistors R18-R22 is selected and connected between the +12V power supply and inductor L4 to determine the amplification factor of the voltage amplifier circuit. The conduction and cutoff of transistors Q7-Q8 are used to amplify the supply and collector current of the 2FSK wireless signal. This system can detect the state of amplitude distortion in the 2FSK wireless signal and perform power amplification with different amplification factors for the two different carrier frequency bands when amplitude distortion occurs.

Description

Technical Field

[0001] This invention relates to the field of wireless communication engineering technology, and in particular to a wireless communication engineering supervision system. Background Technology

[0002] Wireless communication engineering is one of the foundations for the rapid development of the modern communication industry. It holds an important position and plays a vital role in modern society. The development of wireless communication technology will drive the progress of science and technology step by step. However, due to the refraction and reflection of obstacles encountered during wireless communication transmission, wireless communication signals will be lost and attenuated.

[0003] 2FSK modulation means that the symbol "0" corresponds to carrier frequency f1, and the symbol "1" corresponds to the modulated waveform of carrier frequency f2. That is, 2FSK uses two different frequency carriers to transmit digital messages. However, since the attenuation of wireless signals of different frequencies is not the same when they are transmitted in different environments, the amplitude of the 2FSK wireless signal received by the 2FSK receiving antenna and transmitted by the corresponding 2FSK transmitter in the communication engineering has different attenuation. That is, the 2FSK wireless signal exhibits amplitude distortion. Specifically, the attenuation amplitude of the 2FSK wireless signal segment at frequency f1 is inconsistent with the attenuation amplitude of the 2FSK wireless signal segment at frequency f2.

[0004] If a conventional power amplifier is used to amplify the 2FSK wireless signal received by the 2FSK receiving antenna in a communication engineering project, and then the signal is directly transmitted to the 2FSK mixer in a communication engineering project for subsequent mixing and sampling decision, the risk of bit errors and packet loss after sampling decision is extremely high, which will seriously reduce the accuracy of wireless communication. Summary of the Invention

[0005] In view of the above situation and to overcome the defects of the prior art, the purpose of this invention is to provide a wireless communication engineering supervision system that can detect the amplitude distortion of 2FSK wireless signals and perform power amplification of two different carrier frequency bands by different amplification factors when amplitude distortion of 2FSK wireless signals occurs, thereby improving the accuracy of wireless communication.

[0006] The technical solution includes a 2FSK transmitter, a 2FSK receiving antenna, a 2FSK amplitude adjustment module, and a 2FSK mixer. The 2FSK receiving antenna receives the 2FSK wireless signal from the 2FSK transmitter and transmits it to the 2FSK amplitude adjustment module. The 2FSK amplitude adjustment module compares the amplitudes of the two carrier frequencies of the 2FSK wireless signal and amplifies the power of the 2FSK wireless signal before transmitting it to the 2FSK mixer. The 2FSK amplitude adjustment module includes an amplitude-frequency output circuit, an amplitude distortion detection circuit, and a power adjustment circuit.

[0007] The amplitude-frequency output circuit uses operational amplifier AR1 to compare the output of frequency sensor J1 with the voltage division value of resistors R1-R2. When operational amplifier AR1 outputs a positive level, it charges capacitor C1 using the positive half-cycle of the 2FSK wireless signal; when operational amplifier AR1 outputs a negative level, it charges capacitor C2 using the positive half-cycle of the 2FSK wireless signal. The amplitude distortion detection circuit uses operational amplifier AR6 to perform differential calculations on the voltages across capacitor C1 and C2. Operational amplifier AR7 compares the output of operational amplifier AR6 with ground. When operational amplifier AR7 outputs a positive level, the voltage across capacitor C1 is transmitted to the inverting input of operational amplifier AR8; when operational amplifier AR7 outputs a negative level, the voltage across capacitor C2 is transmitted to the inverting input of operational amplifier AR8. Operational amplifier AR8 amplifies the signal from the inverting input. Operational amplifier AR9 amplifies the signal from operational amplifier AR8. When the output is inverted, op-amp AR10 compares the output of op-amp AR6 with the output of op-amp AR9. If op-amp AR10 does not output a positive level, then resistor R18 in the power regulation circuit is connected between the +12V power supply and inductor L4. If op-amp AR10 outputs a positive level, op-amp AR1 outputs a positive level, and op-amp AR7 outputs a negative level, then resistor R19 is connected between the +12V power supply and inductor L4. If op-amp AR1 and op-amp AR7 both output a positive level, then resistor R20 is connected between the +12V power supply and inductor L4. If op-amp AR1 outputs a negative level and op-amp AR7 outputs a positive level, then resistor R21 is connected between the +12V power supply and inductor L4. If op-amp AR1 and op-amp AR7 both output a negative level, then resistor R22 is connected between the +12V power supply and inductor L4.

[0008] Due to the adoption of the above technical solutions, the present invention has the following advantages compared with the prior art:

[0009] Frequency sensor J1 is used to convert the frequency of the 2FSK wireless signal into a DC voltage in real time, and compares it with the voltage division value of resistors R1-R2 to distinguish the two carrier frequencies of the 2FSK wireless signal. Capacitor C1 is used to detect the amplitude of the 2FSK wireless signal in carrier frequency band f1, and capacitor C2 is used to detect the amplitude of the 2FSK wireless signal in carrier frequency band f2. Operational amplifier AR6 is used to perform a difference operation on the amplitude of the 2FSK wireless signal in carrier frequency band f1 and carrier frequency band f2, and obtain the difference between the two amplitudes. This difference is then compared with the smaller amplitude of the two values. Comparisons were made to determine the amplitude distortion state of the 2FSK wireless signal;

[0010] When the 2FSK wireless signal has no amplitude distortion, resistor R18 is connected between the +12V power supply and inductor L4. Resistor R18 determines the amplification factor of the voltage amplifier circuit, allowing both carrier frequencies of the 2FSK wireless signal to be amplified together. When the 2FSK wireless signal has amplitude distortion, the magnitudes of the corresponding amplitudes of the two carrier frequencies are compared. The carrier frequency with the larger amplitude is connected to a larger resistor to select a smaller amplification factor for that carrier frequency, and the carrier frequency with the smaller amplitude is connected to a smaller resistor to select a larger amplification factor for that carrier frequency. This allows for different amplification factors for the two different carrier frequency bands when the 2FSK wireless signal has amplitude distortion, thereby improving the accuracy of wireless communication. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the amplitude-frequency output circuit of a wireless communication engineering supervision system according to the present invention;

[0012] Figure 2 This is a schematic diagram of an amplitude distortion detection circuit for a wireless communication engineering supervision system according to the present invention.

[0013] Figure 3 This is a schematic diagram of the power adjustment circuit of a wireless communication engineering supervision system according to the present invention. Detailed Implementation

[0014] The foregoing and other technical contents, features and effects of the present invention are described in conjunction with the appendix below. Figure 1 To be continued Figure 3 The detailed description of the embodiments will make this clear. All structural details mentioned in the following embodiments are based on the accompanying drawings.

[0015] This invention is limited to communication systems using 2FSK modulation, and the two carrier frequencies f1 and f2 used in 2FSK modulation are different, with f1 < f2.

[0016] To detect the amplitude of each of the two carrier frequencies of the 2FSK wireless signal, the amplitude-frequency output circuit uses a WBF122U01 frequency sensor J1 to sample the 2FSK wireless signal received by the 2FSK receiving antenna in the communication project. It converts the frequency of the 2FSK wireless signal into a DC voltage in real time and outputs it. The DC voltage signal output by the frequency sensor J1 is directly proportional to the frequency; that is, the higher the frequency, the larger the DC voltage signal output by the frequency sensor J1. An operational amplifier AR1 is used to compare the DC voltage signal output by the frequency sensor J1 with the voltage division value of resistors R1-R2. The voltage division value of resistors R1-R2 is set according to the average value of the DC voltage value converted by the frequency sensor J1 at frequency f1 and the DC voltage value converted by the frequency sensor J1 at frequency f2.

[0017] When the operational amplifier AR1 outputs a positive level, it indicates that the 2FSK wireless signal is in the signal segment with a carrier frequency of f2. Relay K1 is turned on, and the 2FSK wireless signal segment with a frequency of f2 is transmitted to the anode of diode D1 through contact 1 of relay K1 and contact 2. The positive half-cycle of the 2FSK wireless signal segment with a frequency of f2 is used to turn on diode D1, so that the positive half-cycle of the 2FSK wireless signal segment with a frequency of f2 charges capacitor C1 to the peak value. The voltage on capacitor C1 is output through operational amplifier AR3, which is the amplitude of the 2FSK wireless signal segment with a frequency of f2.

[0018] When the operational amplifier AR1 outputs a negative level, it indicates that the 2FSK wireless signal is in the signal segment with a carrier frequency of f1. Transistor Q1 is turned on, and relay K2 is turned on accordingly. The 2FSK wireless signal segment with frequency f1 is transmitted to the anode of diode D2 through contact 4 of relay K2. The positive half-cycle of the 2FSK wireless signal segment with frequency f1 is used to turn on diode D2, so that the positive half-cycle of the 2FSK wireless signal segment with frequency f1 charges capacitor C2 to the peak value. The voltage on capacitor C2 is output through operational amplifier AR5, which is the amplitude of the 2FSK wireless signal segment with frequency f1.

[0019] In addition, the function of inductor L1 is to pass DC and block AC, filtering out AC interference in the DC voltage signal output by frequency sensor J1; operational amplifiers AR2-AR5 use themselves as followers to provide isolation; resistors R3 and R4 are current-limiting resistors.

[0020] To detect amplitude distortion in 2FSK wireless signals, an amplitude distortion detection circuit is used, employing an operational amplifier AR6 and resistors R5-R8 to form a differential circuit. The scaling factor of the differential circuit is determined by the ratio of resistors R8 and R7, and the scaling factor is set close to 1. The differential circuit performs a differential operation between the output of operational amplifier AR3 and the output of operational amplifier AR5, that is, it performs a differential operation between the amplitude of the 2FSK wireless signal segment at frequency f2 and the amplitude of the 2FSK wireless signal segment at frequency f1. Simultaneously, operational amplifier AR7 is used to compare the difference obtained by the differential circuit with ground.

[0021] When op-amp AR7 outputs a positive level, it indicates that the difference obtained by the differential circuit is positive, meaning the amplitude of the 2FSK wireless signal segment at frequency f2 is smaller than the amplitude of the 2FSK wireless signal segment at frequency f1. Relay K3 conducts, and its contact 1 connects to contact 2. Therefore, the amplitude of the 2FSK wireless signal segment at frequency f2 is transmitted to the inverting proportional operational circuit composed of op-amp AR8 and resistors R9-R11. The proportional coefficient of the inverting proportional operational circuit is determined by the ratio of resistor R10 to resistor R9, and the proportional coefficient of the inverting proportional operational circuit is set to... The inverting amplifier circuit reduces the amplitude of the 2FSK wireless signal band with frequency f2 back to its original value. The signal is then transmitted to the inverting circuit composed of operational amplifier AR9 and resistors R12-R14. The scaling factor of the inverting circuit is determined by the ratio of resistor R13 to resistor R12. The scaling factor of the inverting proportional operational circuit is set to 1. After inverting the output of the inverting proportional operational circuit, the signal is transmitted to the non-inverting input of operational amplifier AR10, which is the amplitude of the 2FSK wireless signal segment at frequency f2. The signal is transmitted to the non-inverting input of operational amplifier AR10. AR10 compares the difference obtained from the differential circuit with the output of the inverting circuit. Specifically, it compares the difference between the amplitudes of the 2FSK wireless signal band at frequency f2 and f1 with the amplitude of the 2FSK wireless signal band at frequency f2. Make comparisons;

[0022] When the operational amplifier AR7 outputs a negative level, it indicates that the difference obtained by the differential circuit is negative, meaning that the amplitude of the 2FSK wireless signal segment at frequency f1 is smaller than the amplitude of the 2FSK wireless signal segment at frequency f2. Transistor Q2 turns on, and relay K4 subsequently turns on, with contact 1 connecting contact 2. The amplitude of the 2FSK wireless signal segment at frequency f1 is then transmitted to the inverting amplifier circuit, which reduces the amplitude of the 2FSK wireless signal segment at frequency f1 back to its original value. The signal is then transmitted to the inverting circuit, which inverts the output of the inverting proportional operational amplifier circuit and transmits it to the non-inverting input of the operational amplifier AR10, which is the amplitude of the 2FSK wireless signal segment at frequency f1. The signal is transmitted to the non-inverting input of operational amplifier AR10. Operational amplifier AR10 then calculates the difference between the amplitude of the 2FSK wireless signal band at frequency f1 and the amplitude of the 2FSK wireless signal band at frequency f2, and compares this difference with the amplitude of the 2FSK wireless signal band at frequency f1. Make comparisons;

[0023] If op-amp AR10 does not output a positive level, it means that the difference between the amplitude of the 2FSK wireless signal band at frequency f1 and the amplitude of the 2FSK wireless signal band at frequency f2 is less than or equal to the amplitude of the 2FSK wireless signal band at frequency f1. If the 2FSK wireless signal is determined to have no amplitude distortion, then it is determined that the difference between the amplitude of the 2FSK wireless signal segment at frequency f1 and the amplitude of the 2FSK wireless signal segment at frequency f2 is greater than the amplitude of the 2FSK wireless signal segment at frequency f1. This indicates that the 2FSK wireless signal has amplitude distortion; in addition, resistors R15-R17 are current-limiting resistors.

[0024] To determine the amplification factor for the two carrier frequency bands based on the amplitude distortion state of the 2FSK wireless signal, and to amplify the power of the 2FSK wireless signal, a power adjustment circuit is used. This circuit comprises relays K5-K11, dual-gate field-effect transistor Q3, transistors Q4-Q6, inductors L2-L5, capacitors C3 and C6, and resistors R18-R26 to form a voltage amplifier circuit. Based on the frequency of the 2FSK wireless signal band and the corresponding amplitude difference, a specific resistor from R18-R22 is selected and connected between the +12V power supply and inductor L4 to determine the amplification factor of the voltage amplifier circuit. Furthermore, the resistance of resistor R19 is greater than that of resistor R20. 19. The resistance value of resistor R20 is set according to the amplification factor required when amplifying the amplitude of the 2FSK wireless signal segment at frequency f2 to the amplitude required by the 2FSK mixer in the communication engineering; the resistance value of resistor R21 is greater than the resistance value of resistor R22, and the resistance values ​​of resistors R21 and R22 are set according to the amplification factor required when amplifying the amplitude of the 2FSK wireless signal segment at frequency f1 to the amplitude required by the 2FSK mixer in the communication engineering; the amplification factor of resistor R18 is set according to the average of the amplitudes of the 2FSK wireless signal segments at frequency f1 and f2 to the amplitude required by the 2FSK mixer in the communication engineering.

[0025] A voltage amplifier circuit is used to amplify the 2FSK wireless signal using a common-source voltage amplification. Resistor R26 acts as a negative feedback resistor in the static state and stabilizes the static operating point of the dual-gate field-effect transistor Q3 when the temperature changes. Capacitor C6 is a bypass capacitor that short-circuits resistor R26 in the dynamic state, increasing the amplification factor of the voltage amplifier circuit. Resistor R24 ​​sets the first gate voltage of the dual-gate field-effect transistor Q8, while resistors R23 and R25 are bias resistors that set the second gate voltage of the dual-gate field-effect transistor Q3. Inductors L2-L5 prevent noise from entering the voltage amplifier circuit, absorb noise, and stabilize the static operating point of the voltage amplifier circuit.

[0026] A current amplifier circuit is constructed using capacitors C4-C5, diodes D3-D4, transistors Q7-Q8, and resistors R27-R28 to amplify the 2FSK wireless signal using a common-collector current amplifier. In the static state, resistors R27 and R28 provide base bias voltages for transistors Q7 and Q8, respectively, and the emitter-junction voltages of transistors Q7 and Q8 are the forward voltage drops of diodes D3 and D4, respectively. This causes diodes D3 and D4 to be in a weak conducting state, i.e., a Class AB operating state, to overcome crossover distortion. In the dynamic state, when the input is the positive half-cycle of the 2FSK wireless signal, transistor Q7 conducts, and transistor Q8 is cut off. The +12V power supply outputs compensation voltage through transistor Q7. The current amplifier circuit outputs the positive half-cycle of the 2FSK wireless signal. When the input is the negative half-cycle of the 2FSK wireless signal, transistor Q7 is cut off and transistor Q8 is turned on. The -12V power supply outputs a compensation current through transistor Q8, forming the negative half-cycle of the 2FSK wireless signal output by the current amplifier circuit. Transistors Q7 and Q8 work alternately, and after being added together, a complete output waveform is obtained. Power amplification is achieved in the form of compensation and current amplification. The 2FSK wireless signal after power amplification is transmitted to the 2FSK mixer in the communication engineering. Transistors Q7 and Q8 are high-power transistors with the same characteristics. Resistors R27 and R28 have the same resistance value, and capacitors C4-C5 are coupling capacitors.

[0027] If the operational amplifier AR10 does not output a positive level, that is, the 2FSK wireless signal does not have amplitude distortion, then the relay K5 is cut off, its contact 1 connects to contact 2, and the resistor R18 is connected between the power supply +12V and the inductor L4 to determine the amplification factor of the voltage amplifier circuit, so that the 2FSK wireless signal segment with frequency f1 and the 2FSK wireless signal segment with frequency f2 are amplified together.

[0028] If op-amp AR10 outputs a positive level, indicating amplitude distortion of the 2FSK wireless signal, relay K5 conducts, and its contact 1 connects to contact 3. Under this condition, when op-amp AR1 outputs a positive level and op-amp AR7 outputs a negative level, it means the 2FSK wireless signal is in the f2 frequency band, and the amplitude of the 2FSK wireless signal segment at frequency f2 is greater than the amplitude of the 2FSK wireless signal segment at frequency f1. In this case, resistor R19 is connected between the +12V power supply and inductor L4 to determine the amplification factor of the voltage amplifier circuit, thus amplifying the 2FSK wireless signal segment at frequency f2 with a larger amplitude. When op-amp AR1 and op-amp AR7 both output a positive level, it means the 2FSK wireless signal is in the f2 frequency band, and the amplitude of the 2FSK wireless signal segment at frequency f2 is less than the amplitude of the 2FSK wireless signal segment at frequency f1. In this case, resistor R20 is connected between the +12V power supply and inductor L4 to determine the amplification factor of the voltage amplifier circuit. To amplify the voltage of the 2FSK wireless signal segment with frequency f2 and smaller amplitude, when op-amp AR1 outputs a negative level and op-amp AR7 outputs a positive level, it indicates that the 2FSK wireless signal is in the f1 frequency band, and the amplitude of the 2FSK wireless signal segment with frequency f1 is greater than that with frequency f2, resistor R21 is connected between the +12V power supply and inductor L4 to determine the amplification factor of the voltage amplification circuit, thus amplifying the 2FSK wireless signal segment with frequency f1 and larger amplitude. When op-amp AR1 and op-amp AR7 output a negative level, it indicates that the 2FSK wireless signal is in the f1 frequency band, and the amplitude of the 2FSK wireless signal segment with frequency f1 is less than that with frequency f2, resistor R22 is connected between the +12V power supply and inductor L4 to determine the amplification factor of the voltage amplification circuit, thus amplifying the 2FSK wireless signal segment with frequency f1 and smaller amplitude.

[0029] The specific structure of the amplitude-frequency output circuit is as follows: the IN pin of frequency sensor J1 is connected to the non-inverting input of operational amplifier AR2, the non-inverting input of operational amplifier AR4, one end of capacitor C3 in the power adjustment circuit, and the output port of the 2FSK receiving antenna in the communication engineering. The VCC pin of frequency sensor J1 is connected to the +12V power supply, and the GND pin of frequency sensor J1 is grounded. The OUT pin of frequency sensor J1 is connected to one end of inductor L1, and the other end of inductor L1 is connected to the non-inverting input of operational amplifier AR1. The inverting input of operational amplifier AR1 is connected to one end of resistors R1 and R2. The other end of resistor R1 is connected to the +12V power supply, and the other end of resistor R2 is grounded. The output of operational amplifier AR1 is connected to one end of resistors R3 and R4. The other end of resistor R3 is connected to contact 3 of relay K1 and contact 1 of relay K6 in the power adjustment circuit. The other end of resistor R4 is connected to the base of transistor Q1 and the base of transistor Q5 in the power adjustment circuit. The inverting input of operational amplifier AR2 is connected to operational amplifier A... The output of R2 is connected to contact 1 of relay K1. Contact 2 of relay K1 is connected to the anode of diode D1. Contact 4 of relay K1 is grounded and connected to one end of capacitor C1. The cathode of diode D1 is connected to the other end of capacitor C1 and the non-inverting input of operational amplifier AR3. The inverting input of operational amplifier AR3 is connected to the output of operational amplifier AR3 and one end of resistor R7 in the amplitude distortion detection circuit. Contact 1 of relay K3 is connected to the emitter of transistor Q1 and connected to the +6V power supply. The collector of transistor Q1 is connected to the relay K3. Contact 1 of electrical appliance K2 and contact 2 of relay K2 are grounded. The inverting input of op-amp AR4 is connected to the output of op-amp AR4 and contact 3 of relay K2. Contact 4 of relay K2 is connected to the anode of diode D2. The cathode of diode D2 is connected to one end of capacitor C2 and the non-inverting input of op-amp AR5. The other end of capacitor C2 is grounded. The inverting input of op-amp AR5 is connected to the output of op-amp AR5 and one end of resistor R5 in the amplitude distortion detection circuit and contact 2 of relay K4.

[0030] The specific structure of the amplitude distortion detection circuit is as follows: the non-inverting input of operational amplifier AR6 is connected to one end of resistor R6 and the other end of resistor R5, with the other end of resistor R6 grounded. The inverting input of operational amplifier AR6 is connected to one end of resistor R8 and the other end of resistor R7. The other end of resistor R8 is connected to the output of operational amplifier AR6, the non-inverting input of operational amplifier AR7, and the inverting input of operational amplifier AR10, with the inverting input of operational amplifier AR7 grounded. The output of operational amplifier AR7 is connected to one end of resistors R15 and R16. The other end of resistor R15 is connected to contact 3 of relay K3 and contact 4 of relay K8 and contact 2 of relay K10 in the power adjustment circuit. Contact 4 of relay K3 is grounded and contact 3 of relay K4 is connected. The other end of resistor R16 is connected to the base of transistor Q2 and the bases of transistors Q4 and Q6 in the power adjustment circuit. The emitter of transistor Q2... The transistor Q2 is connected to a +6V power supply. The collector of transistor Q2 is connected to contact 4 of relay K4. Contact 2 of relay K3 is connected to contact 1 of relay K4 and one end of resistor R9. The other end of resistor R9 is connected to one end of resistor R10 and the inverting input of op-amp AR8. The output of op-amp AR8 is connected to the other end of resistor R10 and one end of resistor R1. The non-inverting input of op-amp AR8 is connected to one end of resistor R11. The other end of resistor R11 is grounded. The other end of resistor R12 is connected to one end of resistor R13 and the inverting input of op-amp AR9. The non-inverting input of op-amp AR9 is connected to one end of resistor R1. The other end of resistor R14 is grounded. The other end of resistor R13 is connected to the output of op-amp AR9 and the non-inverting input of op-amp AR10. The output of op-amp AR10 is connected to one end of resistor R17. The other end of resistor R17 is connected to contact 4 of relay K5 in the power adjustment circuit.

[0031] The specific structure of the power regulation circuit is as follows: contact 1 of relay K5 is connected to the +12V power supply; contact 5 of relay K5 is grounded; contact 2 of relay K5 is connected to one end of resistor R18; contact 3 of relay K5 is connected to contact 3 of relay K6, contact 3 of relay K9, one end of resistor R23, and one end of resistor R24; the other end of resistor R23 is connected to one end of inductor L2; the other end of inductor L2 is connected to the other end of capacitor C3, one end of inductor L3, and the second gate of dual-gate field-effect transistor Q3; the other end of inductor L3 is connected to one end of resistor R25; the other end of resistor R25 is grounded; and the other end of resistor R24 ​​is connected to the first gate of dual-gate field-effect transistor Q3. The relay's contacts are connected as follows: contact 2 of relay K6 is grounded; contact 4 of relay K6 is connected to contact 3 of relay K7 and contact 1 of relay K8; contact 1 of relay K7 is connected to the collector of transistor Q4; the emitter of transistor Q4 is connected to the +6V power supply; contact 2 of relay K7 is grounded; contact 4 of relay K7 is connected to one end of resistor R19; contact 2 of relay K8 is connected to one end of resistor R20; contact 3 of relay K8 is grounded and connected to contact 1 of relay K10; contact 1 of relay K9 is connected to the collector of transistor Q5; the emitter of transistor Q5 is connected to the +6V power supply; contact 2 of relay K9 is grounded; and contact 4 of relay K9 is connected to contact 3 of relay K10. Contact 1 of relay K11 and contact 4 of relay K10 are connected to one end of resistor R21. Contact 2 of relay K11 is connected to one end of resistor R22. Contact 4 of relay K11 is grounded. Contact 3 of relay K11 is connected to the collector of transistor Q6. The emitter of transistor Q6 is connected to the +6V power supply. The other end of resistor R18 is connected to the other ends of resistors R19, R20, R21, and R22, and one end of inductor L4. The other end of inductor L4 is connected to one end of capacitor C4 and the drain of dual-gate field-effect transistor Q3. The source of dual-gate field-effect transistor Q3 is connected to one end of inductor L5. The other end of inductor L5 is connected to capacitor C4. C6, one end of resistor R26, the other end of resistor R26 is grounded and connected to the other end of capacitor C6, the other end of capacitor C4 is connected to the cathode of diode D3 and the anode of diode D4, the anode of diode D3 is connected to one end of resistor R27 and the base of transistor Q7, the other end of resistor R27 is connected to the +12V power supply and the collector of transistor Q7, the emitter of transistor Q7 is connected to one end of capacitor C5 and the emitter of transistor Q8, the cathode of diode D4 is connected to one end of resistor R28 and the base of transistor Q8, the other end of resistor R28 is connected to the -12V power supply and the collector of transistor Q8, and the other end of capacitor C5 is connected to the input port of the 2FSK mixer for communication engineering.

[0032] In practical application, the amplitude-frequency output circuit uses operational amplifier AR1 to compare the output of frequency sensor J1 with the voltage division value of resistors R1-R2. When operational amplifier AR1 outputs a positive level, capacitor C1 is charged using the positive half-cycle of the 2FSK wireless signal; when operational amplifier AR1 outputs a negative level, capacitor C2 is charged using the positive half-cycle of the 2FSK wireless signal. The amplitude distortion detection circuit uses operational amplifier AR6 to perform differential calculations on the voltages of capacitors C1 and C2. Operational amplifier AR7 compares the output of operational amplifier AR6 with ground. When operational amplifier AR7 outputs a positive level, the voltage on capacitor C1 is transmitted to the inverting input of operational amplifier AR8; when operational amplifier AR7 outputs a negative level, the voltage on capacitor C2 is transmitted to the inverting input of operational amplifier AR8. Operational amplifier AR8 amplifies the signal from the inverting input. Operational amplifier AR9 inverts the output of operational amplifier AR8. Operational amplifier AR10 compares the outputs of operational amplifier AR6 and AR9.

[0033] If op-amp AR10 does not output a positive level, resistor R18 in the power regulation circuit is connected between the +12V power supply and inductor L4. If op-amp AR10 outputs a positive level, op-amp AR1 outputs a positive level, and op-amp AR7 outputs a negative level, resistor R19 is connected between the +12V power supply and inductor L4. If op-amp AR1 and op-amp AR7 both output a positive level, resistor R20 is connected between the +12V power supply and inductor L4. If op-amp AR1 outputs a negative level and op-amp AR7 outputs a positive level, resistor R21 is connected between the +12V power supply and inductor L4. If op-amp AR1 and op-amp AR7 both output a negative level, resistor R22 is connected between the +12V power supply and inductor L4. A current amplification circuit is formed using capacitors C4-C5, diodes D3-D4, transistors Q7-Q8, and resistors R27-R28 to perform common-collector current amplification on the 2FSK wireless signal. In the static state, resistors R27 and R28 provide base bias voltages for transistors Q7 and Q8, respectively. The emitter junction voltages of transistors Q7 and Q8 are the forward voltage drops of diodes D3 and D4, respectively, causing diodes D3 and D4 to be in a weak conducting state. In the dynamic state, when the input is the positive half-cycle of the 2FSK wireless signal, transistor Q7 conducts and transistor Q8 is cut off. The +12V power supply outputs a compensation current through transistor Q7, forming the current amplifier circuit outputting the positive half-cycle of the 2FSK wireless signal. When the input is the negative half-cycle of the 2FSK wireless signal, transistor Q7 is cut off and transistor Q8 conducts. The -12V power supply outputs a compensation current through transistor Q8, forming the current amplifier circuit outputting the negative half-cycle of the 2FSK wireless signal. Transistors Q7 and Q8 work alternately, and their sums produce a complete output waveform, achieving power amplification through compensation and current amplification.

[0034] The above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and it should not be considered that the specific implementation of the present invention is limited to this. For those skilled in the art to which the present invention pertains and related fields, any extensions, operation methods, and data substitutions made based on the technical solution concept of the present invention should fall within the protection scope of the present invention.

Claims

1. A wireless communication engineering supervision system, comprising a 2FSK transmitter, a 2FSK receiving antenna, a 2FSK amplitude adjustment module, and a 2FSK mixer, characterized in that, The 2FSK receiving antenna of the communication engineering receives the 2FSK wireless signal from the 2FSK transmitter of the communication engineering and transmits it to the 2FSK amplitude adjustment module of the communication engineering. The 2FSK amplitude adjustment module of the communication engineering compares the amplitude of the two carrier frequencies of the 2FSK wireless signal and transmits the 2FSK wireless signal to the 2FSK mixer after power amplification. The 2FSK amplitude adjustment module of the communication engineering includes an amplitude frequency output circuit, an amplitude distortion detection circuit and a power adjustment circuit. The amplitude-frequency output circuit uses operational amplifier AR1 to compare the output of frequency sensor J1 with the voltage division value of resistors R1-R2. When operational amplifier AR1 outputs a positive level, capacitor C1 is charged using the positive half-cycle of the 2FSK wireless signal; when operational amplifier AR1 outputs a negative level, capacitor C2 is charged using the positive half-cycle of the 2FSK wireless signal. The amplitude distortion detection circuit uses operational amplifier AR6 to perform a difference operation between the amplitude of the 2FSK wireless signal in carrier frequency band f_1 and carrier frequency band f_2, obtaining the difference between the two amplitudes, and then comparing this difference with... The smaller of the two amplitude values ​​is compared by one-quarter, which is determined by the ratio of resistors R10 and R9. This comparison is used to determine the amplitude distortion state of the 2FSK wireless signal. Specifically, operational amplifier AR6 performs differential calculations on the voltages across capacitors C1 and C2. Operational amplifier AR7 compares the output of operational amplifier AR6 with ground. When operational amplifier AR7 outputs a positive level, the voltage across capacitor C1 is transferred to the inverting input of operational amplifier AR8; when operational amplifier AR7 outputs a negative level, the voltage across capacitor C2 is transferred to the inverting input of operational amplifier AR8. At the inverting input of op-amp AR8, op-amp AR8 amplifies the signal from the inverting input. Op-amp AR9 inverts the output of op-amp AR8. Op-amp AR10 compares the outputs of op-amp AR6 and op-amp AR9. If op-amp AR10 does not output a positive level, resistor R18 in the power regulation circuit is connected between the +12V power supply and inductor L4. If op-amp AR10 outputs a positive level, op-amp AR1 outputs a positive level, and op-amp AR7 outputs a negative level, resistor R19 is connected between the +12V power supply and inductor L4. When both op-amp AR1 and op-amp AR7 output a positive level, resistor R20 is connected between the +12V power supply and inductor L4. When both op-amp AR1 and op-amp AR7 output a negative level, resistor R21 is connected between the +12V power supply and inductor L4. When both op-amp AR1 and op-amp AR7 output a negative level, resistor R22 is connected between the +12V power supply and inductor L4. The resistance of resistor R19 is greater than that of resistor R20, and the resistance of resistor R21 is greater than that of resistor R22.

2. The wireless communication engineering supervision system as described in claim 1, characterized in that, The amplitude-frequency output circuit includes a frequency sensor J1 selected as WBF122U01. The IN pin of the frequency sensor J1 is connected to the non-inverting input of operational amplifier AR2, the non-inverting input of operational amplifier AR4, one end of capacitor C3 in the power adjustment circuit, and the output port of the 2FSK receiving antenna in the communication engineering. The VCC pin of the frequency sensor J1 is connected to the +12V power supply, the GND pin of the frequency sensor J1 is grounded, and the OUT pin of the frequency sensor J1 is connected to one end of inductor L1, and the other end of inductor L1... Connect the non-inverting input of op-amp AR1 to one end of resistors R1 and R2. Connect the other end of resistor R1 to the +12V power supply and the other end of resistor R2 to ground. Connect the output of op-amp AR1 to one end of resistors R3 and R4. Connect the other end of resistor R3 to contact 3 of relay K1 and contact 1 of relay K6 in the power regulation circuit. Connect the other end of resistor R4 to the base of transistor Q1 and the base of transistor Q5 in the power regulation circuit. Connect the inverting input of op-amp AR2 to the... The input terminal is connected to the output terminal of op-amp AR2 and contact 1 of relay K1. Contact 2 of relay K1 is connected to the anode of diode D1. Contact 4 of relay K1 is grounded and connected to one end of capacitor C1. The cathode of diode D1 is connected to the other end of capacitor C1 and the non-inverting input terminal of op-amp AR3. The inverting input terminal of op-amp AR3 is connected to the output terminal of op-amp AR3 and one end of resistor R7 in the amplitude distortion detection circuit, contact 1 of relay K3, and the emitter of transistor Q1 is connected to the +6V power supply. The collector of transistor Q1... The electrode is connected to contact 1 of relay K2, contact 2 of relay K2 is grounded, the inverting input of op-amp AR4 is connected to the output of op-amp AR4 and contact 3 of relay K2, contact 4 of relay K2 is connected to the anode of diode D2, the cathode of diode D2 is connected to one end of capacitor C2 and the non-inverting input of op-amp AR5, the other end of capacitor C2 is grounded, the inverting input of op-amp AR5 is connected to the output of op-amp AR5 and one end of resistor R5 in the amplitude distortion detection circuit and contact 2 of relay K4.

3. The wireless communication engineering supervision system as described in claim 1, characterized in that, The amplitude distortion detection circuit includes an operational amplifier AR6. The non-inverting input of AR6 is connected to one end of resistor R6 and the other end of resistor R5. The other end of resistor R6 is grounded. The inverting input of AR6 is connected to one end of resistor R8 and the other end of resistor R7. The other end of resistor R8 is connected to the output of AR6, the non-inverting input of AR7, and the inverting input of AR10. The inverting input of AR7 is grounded. The output of AR7 is connected to one end of resistors R15 and R16. The other end of resistor R15 is connected to contact 3 of relay K3 and contact 4 of relay K8 and contact 2 of relay K10 in the power adjustment circuit. Contact 4 of relay K3 is grounded, and contact 3 of relay K4 is connected. The other end of resistor R16 is connected to the base of transistor Q2 and the bases of transistors Q4 and Q6 in the power adjustment circuit. The output of transistor Q2... The emitter is connected to the +6V power supply. The collector of transistor Q2 is connected to contact 4 of relay K4. Contact 2 of relay K3 is connected to contact 1 of relay K4 and one end of resistor R9. The other end of resistor R9 is connected to one end of resistor R10 and the inverting input of op-amp AR8. The output of op-amp AR8 is connected to the other end of resistor R10 and one end of resistor R1. The non-inverting input of op-amp AR8 is connected to one end of resistor R11. The other end of resistor R11 is grounded. The other end of resistor R12 is connected to one end of resistor R13 and the inverting input of op-amp AR9. The non-inverting input of op-amp AR9 is connected to one end of resistor R1. The other end of resistor R14 is grounded. The other end of resistor R13 is connected to the output of op-amp AR9 and the non-inverting input of op-amp AR10. The output of op-amp AR10 is connected to one end of resistor R17. The other end of resistor R17 is connected to contact 4 of relay K5 in the power adjustment circuit.

4. The wireless communication engineering supervision system as described in claim 1, characterized in that, The power regulation circuit includes a relay K5. Contact 1 of relay K5 is connected to the +12V power supply, contact 5 of relay K5 is grounded, contact 2 of relay K5 is connected to one end of resistor R18, contact 3 of relay K5 is connected to contact 3 of relay K6, contact 3 of relay K9, one end of resistor R23, and one end of resistor R24. The other end of resistor R23 is connected to one end of inductor L2. The other end of inductor L2 is connected to the other end of capacitor C3, one end of inductor L3, and the second gate of dual-gate field-effect transistor Q3. The other end of inductor L3 is connected to one end of resistor R25, the other end of resistor R25 is grounded, and the other end of resistor R24 ​​is connected to the first gate of dual-gate field-effect transistor Q3. The gate of relay K6 is connected to ground at contact 2. Contact 4 of relay K6 is connected to contact 3 of relay K7 and contact 1 of relay K8. Contact 1 of relay K7 is connected to the collector of transistor Q4. The emitter of transistor Q4 is connected to the +6V power supply. Contact 2 of relay K7 is grounded. Contact 4 of relay K7 is connected to one end of resistor R19. Contact 2 of relay K8 is connected to one end of resistor R20. Contact 3 of relay K8 is grounded and connected to contact 1 of relay K10. Contact 1 of relay K9 is connected to the collector of transistor Q5. The emitter of transistor Q5 is connected to the +6V power supply. Contact 2 of relay K9 is grounded. Contact 4 of relay K9 is connected to contact 1 of relay K10. Contact 1 of relay K11 and contact 4 of relay K10 are connected to one end of resistor R21. Contact 2 of relay K11 is connected to one end of resistor R22. Contact 4 of relay K11 is grounded. Contact 3 of relay K11 is connected to the collector of transistor Q6. The emitter of transistor Q6 is connected to the +6V power supply. The other end of resistor R18 is connected to the other ends of resistors R19, R20, R21, and R22, and one end of inductor L4. The other end of inductor L4 is connected to one end of capacitor C4 and the drain of dual-gate MOSFET Q3. The source of dual-gate MOSFET Q3 is connected to one end of inductor L5. The other end of inductor L5 is connected to capacitor C4. C6, one end of resistor R26, the other end of resistor R26 is grounded and connected to the other end of capacitor C6, the other end of capacitor C4 is connected to the cathode of diode D3 and the anode of diode D4, the anode of diode D3 is connected to one end of resistor R27 and the base of transistor Q7, the other end of resistor R27 is connected to the +12V power supply and the collector of transistor Q7, the emitter of transistor Q7 is connected to one end of capacitor C5 and the emitter of transistor Q8, the cathode of diode D4 is connected to one end of resistor R28 and the base of transistor Q8, the other end of resistor R28 is connected to the -12V power supply and the collector of transistor Q8, and the other end of capacitor C5 is connected to the input port of the 2FSK mixer for communication engineering.

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