Repeater control system

Abstract

The relay control system of the present application, the signal strength acquisition circuit acquires the amplitude of the relay input signal, and outputs to the attenuation amount calculation circuit after filtering and following, calculates the difference with the relay output standard signal, and obtains the attenuation amount added to the gate of the field effect transistor T1, controls the resistance between the drain and source of the field effect transistor T1, the amplifier amplification adjustment circuit adopts frequency selection to receive the relay input signal, and adds to the input end of the photoelectric coupler U1 through the amplification of the operational amplifier AR4, the amplified voltage controls the amplification multiple of the feedback control operational amplifier AR4, the resistance R15, the resistance R16 or the resistance R16 to ground in series, which is used to further adjust the input end voltage of the photoelectric coupler U1, so as to realize the two-stage dynamic adjustment of the amplification multiple, the amplifier power supply adjustment circuit receives the voltage after the voltage division of the resistance R8, the resistance between the drain and source of the field effect transistor T1 and the resistance R9, and adds to the control electrode of the thyristor BCR1, adjusts the output voltage of the thyristor BCR1, provides appropriate power supply for the operational amplifier AR4, and reduces the power consumption.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of repeater, in particular to a repeater control system. BACKGROUND

[0002] The repeater is used for amplifying and retransmitting the transmitted signal when the isomeric network segments with the same interface and the same medium access control protocol are interconnected, so that the signal attenuation caused by the too long network cable line can be avoided, and the transmission reliability can be effectively improved. The existing repeater amplification usually adopts an amplifier to amplify and then completes the amplification function through an optoelectronic coupler isolation. Since the signal input to the repeater is variable, if the amplification multiple and working voltage of the amplifier are fixed, the output signal will be distorted and the power consumption will be increased. SUMMARY

[0003] In view of the defects in the prior art, the present application aims to provide a repeater control system, which effectively solves the problem that the fixed amplification multiple and working voltage of the existing amplifier will cause the output signal to be distorted and the power consumption to be increased.

[0004] The technical solution thereof is to include a signal strength acquisition circuit, an attenuation amount calculation circuit, an amplifier amplification adjustment circuit and an amplifier power supply adjustment circuit. The signal strength acquisition circuit is connected to the attenuation amount calculation circuit. The attenuation amount calculation circuit is connected to the amplifier amplification adjustment circuit and the amplifier power supply adjustment circuit respectively. The amplifier power supply adjustment circuit is connected to the amplifier amplification adjustment circuit.

[0005] Preferably, the amplifier regulating circuit comprises a resistor R11, one end of the resistor R11 is connected to the drain of the field effect transistor T1, the other end of the resistor R11 is connected to one end of the capacitor C4, one end of the resistor R13, and the inverting input terminal of the operational amplifier AR4 respectively, the non-inverting input terminal of the operational amplifier AR4 is connected to the other end of the capacitor C4 and one end of the resistor R14 respectively, the other end of the resistor R14 is connected to one end of the capacitor C5, one end of the ground capacitor C6, and one end of the ground inductor L1 respectively, the other end of the capacitor C5 is connected to the repeater input signal, the output terminal of the operational amplifier AR4 is connected to the other end of the resistor R13 and pin 1 of the optoelectronic coupler U1 respectively, the VCC terminal of the operational amplifier AR4 is connected to the first base of the thyristor BCR1, the GND terminal of the operational amplifier AR4 is connected to the ground, one end of the resistor R15 and the collector of the triode Q4 are connected to pin 2 of the optoelectronic coupler U1 respectively, the other end of the resistor R15 is connected to the emitter of the triode Q4 and one end of the ground resistor R16 respectively, one end of the resistor R18 is connected to the base of the triode Q4, the other end of the resistor R18 is connected to the emitter of the triode Q2, the base of the triode Q2 is connected to the collector of the triode Q3, the base of the triode Q3 is connected to the output terminal of the operational amplifier AR4, the collector of the triode Q2 and the emitter of the triode Q3 are connected to the output terminal of the operational amplifier AR1, pin 4 of the optoelectronic coupler U1 is connected to the power supply +6V through the resistor R17, and pin 3 of the optoelectronic coupler U1 is the repeater output signal.

[0006] Preferably, the amplifier power supply regulating circuit comprises a resistor R10, one end of the resistor R10 is connected to the drain of the field effect transistor T1, the other end of the resistor R10 is connected to the base of the triode Q1, the emitter of the triode Q1 is connected to the ground, the collector of the triode Q1 is connected to one end of the resistor R12, the other end of the resistor R12 is connected to the control electrode of the thyristor BCR1, the second base of the thyristor BCR1 is connected to the power supply +30V, and the first base of the thyristor BCR1 is connected to the VCC terminal of the operational amplifier AR4.

[0007] The beneficial effects of the present application are: 1, the amplitude of the relay input signal is collected by using the resistor R1, and after filtering and following, the output is output to the differential amplifier to calculate the difference between the signal strength collection circuit output signal and the relay output standard signal, and the attenuation amount is obtained, that is, the amount of amplifier compensation amplification is added to the gate of the field effect tube T1 to control the resistance between the drain and source of the field effect tube T1. The output voltage of the operational amplifier AR4 is fed back to the inverting input terminal of the operational amplifier AR4 through the resistance R13, the resistance R11, the resistance between the drain and source of the field effect tube T1, and the resistance R9. The feedback voltage controls the amplification multiple of the operational amplifier AR4. The output signal of the operational amplifier AR4 is added to pin 1 of the optocoupler U1. Pin 2 of the optocoupler U1 is connected to ground through the series connection of the resistance R15 and the resistance R16 or the resistance R16, which is used to further adjust the input voltage of the optocoupler U1. The optocoupler U1 converts and isolates the input voltage and outputs it. In this way, the dynamic adjustment of the amplification multiple of the operational amplifier AR4 and the optocoupler is realized.

[0008] 2, the voltage after receiving the resistance R8, the resistance between the drain and source of the field effect tube T1, and the resistance R9 is divided, and is added to the base of the triode Q1 through the resistance R10. The collector of the triode Q1 is connected to the control electrode of the thyristor BCR1 through the resistance R12. The size of the output voltage of the first base of the thyristor BCR1 is adjusted to provide a suitable power supply for the operational amplifier AR4. The power consumption is reduced, and the energy utilization rate is improved. BRIEF DESCRIPTION OF DRAWINGS

[0009] Fig. 1 The circuit schematic diagram of the present application.

[0010] Fig. 2 The circuit block diagram of the present application. DETAILED DESCRIPTION

[0011] The foregoing and other technical contents, features and effects of the present application will be described in detail below with reference to the accompanying drawings. Figs. 1-2 The detailed description of the embodiments will be clearly presented. The structural contents mentioned in the following embodiments are all referred to the drawings.

[0012] The exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0013] The embodiment one is a relay control system, which comprises a signal strength acquisition circuit, an attenuation amount calculation circuit, an amplifier amplification adjustment circuit and an amplifier power supply adjustment circuit. The signal strength acquisition circuit adopts resistance R1 to acquire the amplitude of the relay input signal, filters through resistance R2, capacitor C1 and C2, and then outputs to the attenuation amount calculation circuit through operational amplifier AR1 following. The difference between the output signal of the signal strength acquisition circuit and the standard signal of the relay is calculated by the differential amplifier composed of operational amplifier AR3, resistance R3, resistance R5, resistance R6 and operational amplifier AR2, so as to obtain the attenuation amount, i.e. the amount of amplifier compensation amplification, which is added to the gate of field effect tube T1 to control the resistance between the drain and source of field effect tube T1. The amplifier amplification adjustment circuit adopts a frequency selection circuit to receive the relay input signal and add to the non-inverting input terminal of operational amplifier AR4. The voltage at the output terminal of operational amplifier AR4 is fed back to the inverting input terminal of operational amplifier AR4 through resistance R13, resistance R11, the resistance between the drain and source of field effect tube T1 and resistance R9, so as to control the amplification multiple of operational amplifier AR4 through the feedback voltage. Capacitor C4 is the differential filter capacitor of operational amplifier AR4. The output signal of operational amplifier AR4 is added to pin 1 of photoelectric coupler U1. Pin 2 of photoelectric coupler U1 is connected to resistance R15 and resistance R16 in series to ground, so as to further adjust the voltage at the input terminal of photoelectric coupler U1. Specifically, the difference between the standard signal of the relay and the output signal of operational amplifier AR4 is calculated by the subtracter composed of triodes Q2 and Q3. When the difference is positive and higher than the turn-on voltage of triode Q4, triode Q4 is turned on, resistance R15 is short-circuited, the voltage at the input terminal of photoelectric coupler U1 is increased, and photoelectric coupler U1 converts and isolates the input voltage and then outputs, so as to realize the dynamic adjustment of the amplification multiple of operational amplifier AR4 and photoelectric coupler. The amplifier power supply adjustment circuit receives the voltage after resistance R8, the resistance between the drain and source of field effect tube T1 and resistance R9 are divided, and then adds to the base of triode Q1 through resistance R10. The collector of triode Q1 is connected to the control electrode of thyristor BCR1 through resistance R12, so as to adjust the size of the output voltage of the first base of thyristor BCR1 and provide appropriate power supply for operational amplifier AR4, thereby reducing the power consumption and improving the energy utilization rate.

[0014] In the embodiment two, on the basis of the embodiment one, the signal strength collecting circuit adopts resistance R1 to collect the amplitude of the repeater input signal, filters through resistance R2, capacitor C1 and C2, and then outputs to the attenuation amount calculating circuit through operational amplifier AR1 following, which comprises resistance R1, one end of which is connected with the repeater input signal, and the other end of which is connected with one end of ground capacitor C1 and one end of resistance R2 respectively, and the other end of resistance R2 is connected with one end of ground capacitor C2 and non-inverting input terminal of operational amplifier AR2 respectively.

[0015] In the embodiment three, on the basis of the embodiment one, the attenuation amount calculating circuit adopts differential amplifier composed of operational amplifier AR3, resistance R3, resistance R5, resistance R6 and operational amplifier AR2 to calculate the difference between the output signal of the signal strength collecting circuit and the repeater output standard signal (specifically the amplitude of high level signal), and then obtains the attenuation amount, that is, the amount of amplifier compensation amplification, which is added to the gate of field effect transistor T1 through resistance R7 and electrolytic capacitor E1 reverse charging, to control the resistance value between the drain and source of field effect transistor T1, which comprises operational amplifier AR3, the non-inverting input terminal of which is connected with the other end of resistance R3, and the non-inverting input terminal of which is connected with one end of resistance R5 and one end of resistance R6 respectively, and the other end of resistance R5 is connected with the output terminal and the inverting input terminal of operational amplifier AR1 respectively, and the non-inverting input terminal of operational amplifier AR1 is connected with the repeater output standard signal, and the other end of resistance R6 is connected with the output terminal of operational amplifier AR3 and one end of resistance R7 respectively, and the other end of resistance R7 is connected with the negative pole of ground electrolytic capacitor E1 and the gate of field effect transistor T1 respectively, and the source of field effect transistor T1 is connected with one end of ground capacitor C3 and one end of ground resistance R9 respectively, and the drain of field effect transistor T1 is connected with one end of resistance R8 and one end of resistance R10 respectively, and the other end of resistance R8 is connected with power supply +6V.

[0016] In the fourth embodiment, on the basis of the first embodiment, the amplifier amplification adjusting circuit adopts a frequency selection circuit composed of a capacitor C5, a resistor R14, a capacitor C6 and an inductor L1 to receive the repeater input signal and add it to the non-inverting input terminal of an operational amplifier AR4, and the inverting input terminal of the operational amplifier AR4 is connected to a feedback voltage. Specifically, the output terminal voltage of the operational amplifier AR4 is divided by a resistor R13, a resistor R11, the resistance between the drain and source of a field effect transistor T1, and a resistor R9, and then fed back to the inverting input terminal of the operational amplifier AR4, so as to control the amplification multiple of the operational amplifier AR4 through the feedback voltage. The capacitor C4 is a differential filter capacitor of the operational amplifier AR4. The output signal of the operational amplifier AR4 is added to pin 1 of a photoelectric coupler U1, and pin 2 of the photoelectric coupler U1 is connected to a resistor R15 and a resistor R16 in series to ground, so as to further adjust the input voltage of the photoelectric coupler U1. Specifically, a difference between the repeater output standard signal and the output signal of the operational amplifier AR4 is calculated by a subtracter composed of a triode Q2 and a triode Q3, and the difference is added to the base of a triode Q4 through a resistor R18. When the difference is positive and higher than the conduction voltage of the triode Q4, the triode Q4 is turned on, the resistor R15 is short-circuited, the input voltage of the photoelectric coupler U1 is increased, and the photoelectric coupler U1 converts and isolates the input voltage and then outputs the same, so as to realize dynamic adjustment of the amplification multiple of the two stages of the operational amplifier AR4 and the photoelectric coupler, improve the amplification precision, and avoid the problem of amplification distortion. The resistor R11 is connected at one end to the drain of the field effect transistor T1, and at the other end to one end of the capacitor C4, one end of the resistor R13, and the inverting input terminal of the operational amplifier AR4. The non-inverting input terminal of the operational amplifier AR4 is connected at one end to the other end of the capacitor C4 and one end of the resistor R14. The other end of the resistor R14 is connected to one end of the capacitor C5, one end of the capacitor C6, and one end of the inductor L1. The other end of the capacitor C5 is connected to the repeater input signal. The output terminal of the operational amplifier AR4 is connected to the other end of the resistor R13 and pin 1 of the photoelectric coupler U1. The VCC terminal of the operational amplifier AR4 is connected to the first base of a thyristor BCR1. The GND terminal of the operational amplifier AR4 is connected to ground. Pin 2 of the photoelectric coupler U1 is connected at one end to the resistor R15 and at the other end to the collector of the triode Q4. The other end of the resistor R15 is connected to the emitter of the triode Q4 and one end of a ground resistor R16. The base of the triode Q4 is connected at one end to the resistor R18 and at the other end to the emitter of the triode Q2. The base of the triode Q2 is connected to the collector of the triode Q3. The base of the triode Q3 is connected to the output terminal of the operational amplifier AR4. The collector of the triode Q2 and the emitter of the triode Q3 are connected to the output terminal of the operational amplifier AR1. Pin 4 of the photoelectric coupler U1 is connected through a resistor R17 to a power supply +6V. Pin 3 of the photoelectric coupler U1 is the repeater output signal.

[0017] In the fifth embodiment, on the basis of the first embodiment, the amplifier power supply adjusting circuit receives the resistance R8, the field effect tube T1 drain-source resistance, the resistance R9 voltage after voltage division, and adds to the base of the triode Q1 through the resistance R10. The collector of the triode Q1 is connected to the control electrode of the thyristor BCR1 through the resistance R12. The size of the first base output voltage of the thyristor BCR1 is adjusted. The appropriate power supply is provided for the operational amplifier AR4. The power consumption is reduced. The energy utilization rate is improved. The resistance R10 is included. One end of the resistance R10 is connected to the drain of the field effect tube T1. The other end of the resistance R10 is connected to the base of the triode Q1. The emitter of the triode Q1 is connected to the ground. The collector of the triode Q1 is connected to one end of the resistance R12. The other end of the resistance R12 is connected to the control electrode of the thyristor BCR1. The second base of the thyristor BCR1 is connected to the power supply +30V. The first base of the thyristor BCR1 is connected to the VCC end of the operational amplifier AR4.

[0018] The application specifically uses the signal strength acquisition circuit to adopt resistance R1 to collect the amplitude of the repeater input signal, and outputs to the attenuation calculation circuit after filtering and following. The difference between the signal strength acquisition circuit output signal and the repeater output standard signal is calculated by using a differential amplifier to obtain the attenuation, which is the amount of amplifier compensation amplification, and is added to the gate of field effect tube T1 to control the resistance between the drain and source of field effect tube T1. The amplifier amplification adjusting circuit adopts a frequency selection circuit to receive the repeater input signal and add to the non-inverting input terminal of operational amplifier AR4. The inverting input terminal of operational amplifier AR4 is connected to a feedback voltage. Specifically, the output terminal voltage of operational amplifier AR4 is fed back to the inverting input terminal of operational amplifier AR4 after being divided by resistance R13, resistance R11, the resistance between the drain and source of field effect tube T1, and resistance R9. The amplification multiple of operational amplifier AR4 is controlled by the feedback voltage. Capacitor C4 is the differential filter capacitor of operational amplifier AR4. The output signal of operational amplifier AR4 is added to pin 1 of photoelectric coupler U1. Pin 2 of photoelectric coupler U1 is connected to resistance R15 and resistance R16 in series to ground, to further adjust the input voltage of photoelectric coupler U1. Specifically, the difference between the repeater output standard signal and the output signal of operational amplifier AR4 is calculated by using the subtracter composed of triodes Q2 and Q3. When the difference is positive and higher than the turn-on voltage of triode Q4, triode Q4 is turned on, resistance R15 is short-circuited, the input voltage of photoelectric coupler U1 is increased, and the input voltage of photoelectric coupler U1 is converted and isolated and then output, so as to realize the dynamic adjustment of the amplification multiple of operational amplifier AR4 and photoelectric coupler. The amplifier power supply adjusting circuit receives the voltage after resistance R8, the resistance between the drain and source of field effect tube T1, and resistance R9 are divided, and adds to the base of triode Q1 through resistance R10. The collector of triode Q1 is connected to the control electrode of thyristor BCR1 through resistance R12, to adjust the size of the output voltage of the first base of thyristor BCR1 and provide appropriate power supply for operational amplifier AR4, so as to reduce the power consumption and improve the energy utilization rate.

Claims

1. A repeater control system comprising a signal strength acquisition circuit, an attenuation amount calculation circuit, an amplifier amplification adjustment circuit, and an amplifier power supply adjustment circuit, characterized by, The signal strength acquisition circuit is connected with the attenuation amount calculation circuit, the attenuation amount calculation circuit is connected with the amplifier amplification adjustment circuit and the amplifier power supply adjustment circuit respectively, and the amplifier power supply adjustment circuit is connected with the amplifier amplification adjustment circuit. The signal strength acquisition circuit adopts the resistance R1 to collect the amplitude of the relay input signal, filters through the resistance R2, the capacitor C1 and the capacitor C2, and then outputs to the attenuation amount calculation circuit through the operational amplifier AR1. The difference between the output signal of the signal strength acquisition circuit and the standard signal of the relay is calculated by the differential amplifier composed of the operational amplifier AR3, the resistance R3, the resistance R5, the resistance R6 and the operational amplifier AR2, and the attenuation amount is obtained, that is, the amount of amplifier compensation amplification, which is added to the gate of the field effect tube T1 to control the resistance between the drain and the source of the field effect tube T1. The amplifier amplification adjustment circuit adopts the frequency selection circuit to receive the relay input signal and add to the non-inverting input terminal of the operational amplifier AR4. The feedback voltage is connected to the inverting input terminal of the operational amplifier AR4. The output voltage of the operational amplifier AR4 is fed back to the inverting input terminal of the operational amplifier AR4 through the resistance R13, the resistance R11, the resistance between the drain and the source of the field effect tube T1 and the resistance R9. The amplification multiple of the operational amplifier AR4 is controlled by the feedback voltage. The capacitor C4 is the differential filter capacitor of the operational amplifier AR4. The output signal of the operational amplifier AR4 is added to the pin 1 of the photoelectric coupler U1. The pin 2 of the photoelectric coupler U1 is connected with the resistance R15 and the resistance R16 in series to the ground, which is used to further adjust the input voltage of the photoelectric coupler U1. When the difference between the standard signal of the relay and the output signal of the operational amplifier AR4 is a positive difference and is higher than the turn-on voltage of the triode Q4, the triode Q4 is turned on, the resistance R15 is short-circuited, the input voltage of the photoelectric coupler U1 is increased, and the input voltage of the photoelectric coupler U1 is converted and isolated and then output, so as to realize the dynamic adjustment of the amplification multiple of the two stages of the operational amplifier AR4 and the photoelectric coupler. The amplifier power supply adjustment circuit receives the voltage after the resistance R8, the resistance between the drain and the source of the field effect tube T1 and the resistance R9 are divided, and then adds the voltage to the base of the triode Q1 through the resistance R10. The collector of the triode Q1 is connected to the control electrode of the thyristor BCR1 through the resistance R12, so as to adjust the output voltage of the first base of the thyristor BCR1 and supply power for the operational amplifier AR4.

2. The repeater control system of claim 1, wherein, The signal strength acquisition circuit comprises the resistance R1. One end of the resistance R1 is connected with the relay input signal, and the other end of the resistance R1 is connected with one end of the ground capacitor C1 and one end of the resistance R2 respectively. The other end of the resistance R2 is connected with one end of the ground capacitor C2 and the non-inverting input terminal of the operational amplifier AR2 respectively. The inverting input terminal of the operational amplifier AR2 is connected with the output terminal of the operational amplifier AR1 and one end of the resistance R3 respectively.

3. The repeater control system of claim 1, wherein, The attenuation amount calculation circuit comprises an operational amplifier AR3, the non-inverting input of the operational amplifier AR3 is connected to the other end of a resistor R3, the inverting input of the operational amplifier AR3 is connected to one end of a resistor R5 and one end of a resistor R6 respectively, the other end of the resistor R5 is connected to the output and the inverting input of an operational amplifier AR1 respectively, the non-inverting input of the operational amplifier AR1 is connected to a relay output standard signal, the other end of the resistor R6 is connected to the output of the operational amplifier AR3 and one end of a resistor R7 respectively, the other end of the resistor R7 is connected to the negative electrode of a ground electrolytic capacitor E1 and the gate of a field effect transistor T1 respectively, the source of the field effect transistor T1 is connected to one end of a ground capacitor C3 and one end of a ground resistor R9 respectively, the drain of the field effect transistor T1 is connected to one end of a resistor R8 and one end of a resistor R10 respectively, and the other end of the resistor R8 is connected to a power supply +6V.

4. The repeater control system of claim 1, wherein, The amplifier amplification adjustment circuit comprises a resistor R11, one end of the resistor R11 is connected to the drain of the field effect transistor T1, the other end of the resistor R11 is connected to one end of a capacitor C4, one end of a resistor R13 and the inverting input of an operational amplifier AR4 respectively, the non-inverting input of the operational amplifier AR4 is connected to the other end of the capacitor C4 and one end of a resistor R14 respectively, the other end of the resistor R14 is connected to one end of a capacitor C5, one end of a ground capacitor C6 and one end of a ground inductor L1 respectively, the other end of the capacitor C5 is connected to a relay input signal, the output of the operational amplifier AR4 is connected to the other end of the resistor R13 and pin 1 of a photoelectric coupler U1 respectively, the VCC terminal of the operational amplifier AR4 is connected to the first base of a thyristor BCR1, the GND terminal of the operational amplifier AR4 is connected to ground, pin 2 of the photoelectric coupler U1 is connected to one end of a resistor R15 and the collector of a triode Q4 respectively, the other end of the resistor R15 is connected to the emitter of the triode Q4 and one end of a ground resistor R16 respectively, one end of a resistor R18 is connected to the base of the triode Q4, the other end of the resistor R18 is connected to the emitter of a triode Q2, the base of the triode Q2 is connected to the collector of a triode Q3, the base of the triode Q3 is connected to the output of the operational amplifier AR4, the collector of the triode Q2 and the emitter of the triode Q3 are connected to the output of the operational amplifier AR1, pin 4 of the photoelectric coupler U1 is connected to a power supply +6V through a resistor R17, and pin 3 of the photoelectric coupler U1 is a relay output signal.

5. The repeater control system of claim 1, wherein, The amplifier power supply adjustment circuit comprises a resistor R10, one end of the resistor R10 is connected to the drain of the field effect transistor T1, the other end of the resistor R10 is connected to the base of a triode Q1, the emitter of the triode Q1 is connected to ground, the collector of the triode Q1 is connected to one end of a resistor R12, the other end of the resistor R12 is connected to the control electrode of a thyristor BCR1, the second base of the thyristor BCR1 is connected to a power supply +30V, and the first base of the thyristor BCR1 is connected to the VCC terminal of the operational amplifier AR4.

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