CN114414489B - A SF6 Gas Optical Sensing Information Monitoring System - Google Patents

Abstract

The invention discloses an SF6 gas optical sensing information monitoring system, wherein when an operational amplifier AR1 outputs a positive level and an operational amplifier AR4 does not output a positive level, a first oscillation network is connected between the in-phase input end and the output end of an operational amplifier AR7, when the operational amplifier AR1 does not output the positive level and the operational amplifier AR4 outputs the positive level, a second oscillation network is connected between the in-phase input end and the output end of the operational amplifier AR7, when the operational amplifier AR1 and the operational amplifier AR4 both output the positive level, a third oscillation network is connected between the in-phase input end and the output end of the operational amplifier AR7, when an operational amplifier AR3 outputs the positive level or the operational amplifier AR6 outputs the positive level, a sine wave modulation signal is transmitted to the base electrode of a triode Q1 through a second local oscillation network, and a second frequency selection network is connected to the collector electrode of the triode Q1, otherwise, the sine wave modulation signal is transmitted to the base electrode of the triode Q1 through the first local oscillation network, and the first frequency selection network is connected to the collector electrode of the triode Q1, so that a corresponding prompt is sent to an optical monitoring control terminal according to the size of an incident angle.

Description

A SF6 Gas Optical Sensing Information Monitoring System

technical field

The invention relates to the technical field of SF6 gas monitoring, in particular to an SF6 gas optical sensing information monitoring system.

Background technique

Pure SF6 gas has excellent insulation performance and arc extinguishing performance, and is widely used in high- and medium-voltage electrical equipment. With the popularization of SF6 gas-insulated equipment and the increase in operating life, the requirements for installation, commissioning, maintenance and maintenance of SF6 electrical equipment are getting higher and higher, especially the requirements for testing the gas moisture in SF6 electrical equipment are more stringent;

For the measurement of SF6 gas moisture, the prior art usually adopts the optical detection method, and the specific working principle is: the first light source transmitter and the second light source transmitter are arranged on one side of the SF6 gas to be measured, and the corresponding first optical receiving sensor and the second optical receiving sensor are arranged on the other side of the SF6 gas to be measured, which are respectively used to receive the first light source transmitter and the second light source transmitter. The light energy absorbed in the SF6 gas is used to calculate the moisture content in the SF6 gas;

However, this optical detection method has extremely high requirements for setting the positions of the first light source emitter and the second light source emitter, and the positions of the first optical receiving sensor and the second optical receiving sensor. If the second light source passes through the SF6 gas to be measured and fails to enter the second optical receiving sensor vertically, there will be errors in the two sets of measurement signals obtained, and the error will increase with the increase of the incident angle of the light source, which will affect the accuracy of the two sets of measurement signals, thereby reducing the detection accuracy of the moisture content in the SF6 gas.

Contents of the invention

For above-mentioned situation, in order to overcome the defective of prior art, the object of the present invention is to provide a kind of SF6 gas optical sensing information monitoring system, can detect the incident angle that the first light source passes through to-be-measured SF6 gas and injects into the first optical receiving sensor, and detects the incident angle that the second light source passes through to-be-measured SF6 gas and injects into the second optical receiving sensor, and sends corresponding prompt to optical monitoring control terminal according to the size of incident angle, thereby improves the accuracy of two groups of measurement signals, improves the detection accuracy to the moisture content in SF6 gas.

The technical solution is to include the position of the first light source transmitter, the second light source transmitter, the first optical receiving sensor, the second optical receiving sensor, the first beam analyzer, the second beam analyzer, the SF6 gas monitoring control terminal and the optical monitoring control terminal. The first light source transmitter generates and emits the first light source, and the second light source transmitter generates and emits the second light source. Comparing the size of the incident angle, and sending a prompt to the SF6 gas monitoring control terminal, the SF6 gas monitoring control terminal includes a first optical detection circuit, a second optical detection circuit, a modulation signal generation circuit, and a frequency modulation transmission circuit;

The first optical detection circuit uses the operational amplifier AR1 to compare the first incident angle signal output by the first beam analyzer with the divided voltage value of the resistors R1-R2. When the operational amplifier AR1 outputs a positive level, use the operational amplifier AR3 to compare the first incident angle signal with the divided voltage value of the resistors R3-R4. The second optical detection circuit uses the operational amplifier AR4 to compare the second incident angle signal output by the second beam analyzer with the divided voltage value of the resistors R7-R8. AR6 compares the first incident angle signal with the divided voltage value of the resistors R9-R10. When the operational amplifier AR1 outputs a positive level and the operational amplifier AR4 does not output a positive level, the first oscillating network composed of capacitors C5-C6 and resistors R15-R16 in the modulation signal generating circuit is connected between the non-inverting input terminal of the operational amplifier AR7 and the output terminal of the operational amplifier AR7. The second oscillating network composed of R20 is connected between the non-inverting input terminal of the operational amplifier AR7 and the output terminal of the operational amplifier AR7. When the operational amplifier AR1 outputs a positive level and the operational amplifier AR4 outputs a positive level, the third oscillating network composed of capacitors C7-C8 and resistors R17-R18 is connected between the non-inverting input terminal of the operational amplifier AR7 and the output terminal of the operational amplifier AR7. The second local oscillator network composed of inductor L4, varactor diode D6 and crystal oscillator Y2 in the FM transmitting circuit is transmitted to the base of the transistor Q1, and the second frequency selection network composed of capacitor C14 and inductor L6 is connected to the collector of the transistor Q1. On the contrary, the sine wave modulation signal output by the operational amplifier AR7 is transmitted to the base of the transistor Q1 through the first local oscillator network composed of the inductor L3, varactor diode D5 and crystal oscillator Y1 in the FM transmitting circuit, and the capacitor C13, inductor L5 The formed first frequency selection network is connected to the collector of the triode Q1.

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

Use the first optical detection circuit to detect the incident angle of the first light source passing through the SF gas to be measured and inject the second optical receiving sensor after passing through the SF gas to be measured, and use the second optical detection circuit to detect the incident angle of the second light source passing through the SF gas to be measured and inject the second optical receiving sensor. f₁The sine wave modulation signal and the first local oscillator signal are modulated and sent to the first communication module of the SF6 gas monitoring and control terminal; under the premise that the first light source passes through the SF6 gas to be measured and then vertically injects into the first optical receiving sensor, when the second light source passes through the SF6 gas to be measured and enters the second optical receiving sensor at an angle of incidence greater than 0 ° and less than 30 °, the frequency used is that the generation frequency is f₂The sine wave modulation signal and the first local oscillator signal are modulated and transmitted to the first communication module of the SF6 gas monitoring control terminal; under the premise that the incident angle of the first light source passing through the SF6 gas to be measured and entering the second optical receiving sensor is greater than 0 ° and less than 30 °, when the first light source passes through the SF6 gas to be measured and the incident angle of the second optical receiving sensor is greater than 0 ° and less than 30 °, the frequency used is that the generated frequency is f₃The sine wave modulation signal and the first local oscillator signal are modulated and then transmitted to the first communication module of the SF6 gas monitoring and control terminal;

Under the premise that the second light source passes through the SF6 gas to be measured and then shoots vertically into the second optical receiving sensor, when the first light source passes through the SF6 gas to be measured and then enters the first optical receiving sensor at an angle of incidence greater than 30° and less than 90°, the frequency used is f₁The sine wave modulation signal and the second local oscillator signal are modulated and then sent to the second communication module of the SF6 gas monitoring and control terminal; under the premise that the first light source passes through the SF6 gas to be measured and then vertically injects into the first optical receiving sensor, when the second light source passes through the SF6 gas to be measured and enters the second optical receiving sensor at an angle of incidence greater than 30 ° and less than 90 °, the frequency used is that the generated frequency is f₂The sine wave modulation signal and the second local oscillator signal are modulated and sent to the second communication module of the SF6 gas monitoring control terminal; under the premise that the incident angle of the first light source passing through the SF6 gas to be measured and entering the second optical receiving sensor is greater than 30 ° and less than 90 °, when the first light source passes through the SF6 gas to be measured and the incident angle of entering the second optical receiving sensor is greater than 30 ° and less than 90 °, the frequency used is f₃The sine wave modulation signal and the second local oscillator signal are modulated and then transmitted to the second communication module of the SF6 gas monitoring and control terminal, so as to send corresponding prompts to the SF6 gas monitoring and control terminal according to the incident angle, thereby improving the accuracy of the two sets of measurement signals and improving the detection accuracy of the moisture content in the SF6 gas.

Description of drawings

Fig. 1 is the schematic diagram of the first optical detection circuit of the present invention;

Fig. 2 is the schematic diagram of the second optical detection circuit of the present invention;

Fig. 3 is the schematic diagram of the modulation signal generation circuit of the present invention;

Fig. 4 is a schematic diagram of the FM transmitting circuit of the present invention.

Detailed ways

The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to accompanying drawings 1 to 4 . The structural contents mentioned in the following embodiments are all based on the accompanying drawings of the description.

In order to detect the incident angle of the first light source entering the first optical receiving sensor after passing through the SF6 gas to be measured, and judge the incident angle, the first optical detection circuit is used, and the first beam analyzer is used to measure the incident angle of the first light source entering the first optical receiving sensor, and it is transmitted to the angle transmitter J1. The angle transmitter J1 converts the incident angle angle measured by the first beam analyzer into a DC voltage signal and outputs it as the first incident angle signal. The corresponding conversion is 0-10V, where 0° corresponds to 0V, and 90° corresponds to 10V; and the incident angle received by the angle transmitter J1 is proportional to the DC voltage signal output by the angle transmitter J1;

After the first incident angle signal is filtered by the first filter network composed of capacitors C1-C2 and inductor L1, it is transmitted to the non-inverting input terminal of the operational amplifier AR1 and the non-inverting input terminal of the operational amplifier AR2. The operational amplifier AR1 is used to compare the first incident angle signal with the divided voltage value of the resistors R1-R2. The divided voltage value of the resistors R1-R2 is set according to 0V and is slightly larger than 0V. If the first incident angle signal is less than or equal to the divided voltage value of the resistors R1-R2, the first beam analyzer The measured angle of incidence is 0°, that is, the first light source passes through the SF6 gas to be measured and can enter the first optical receiving sensor vertically, then the operational amplifier AR1 cannot output a positive level at this time; if the first incident angle signal is greater than the partial voltage value of the resistors R1-R2, it indicates that the incident angle measured by the first beam analyzer is greater than 0°, that is, the first light source passes through the SF6 gas to be measured and fails to enter the first optical receiving sensor vertically. 1 Connect contact 2, contact 3 connect to contact 4, use the operational amplifier AR3 to compare the first incident angle signal with the voltage division value of the resistor R3-R4, wherein the voltage division value of the resistor R3-R4 is set according to the DC voltage output by the angle transmitter J1 at 30°;

If the first incident angle signal is less than or equal to the divided voltage value of resistors R3-R4, it means that the incident angle measured by the first beam analyzer is greater than 0° and less than 30°, and the operational amplifier AR3 cannot output a positive level at this time; The device AR2 itself is used as a follower and plays an isolation role.

In order to detect the incident angle at which the second light source passes through the SF6 gas to be measured and enters the second optical receiving sensor, and judge the incident angle, the second optical detection circuit is used to measure the incident angle at which the second light source enters the second optical receiving sensor with the second beam analyzer, and it is transmitted to the angle transmitter J2.

After the second incident angle signal is filtered by the second filter network composed of capacitors C3-C4 and inductor L2, it is transmitted to the non-inverting input terminal of the operational amplifier AR4 and the non-inverting input terminal of the operational amplifier AR5. The operational amplifier AR4 is used to compare the second incident angle signal with the divided voltage value of the resistors R7-R8. The divided voltage value of the resistors R7-R8 is set according to 0V and is slightly larger than 0V. If the second incident angle signal is less than or equal to the divided voltage value of the resistors R7-R8, the second beam analyzer The measured angle of incidence is 0°, that is, the second light source passes through the SF6 gas to be measured and can enter the second optical receiving sensor vertically, then the op amp AR4 cannot output a positive level at this time; if the second incident angle signal is greater than the partial voltage value of the resistors R7-R8, it indicates that the incident angle measured by the second beam analyzer is greater than 0°, that is, the second light source passes through the SF6 gas to be measured and fails to enter the second optical receiving sensor vertically, then the op amp AR4 outputs a positive level at this time, the diode D3 is turned on, and the relay K2 is turned on, and its contacts 1 Connect contact 2, contact 3 connect to contact 4, use the operational amplifier AR6 to compare the second incident angle signal with the voltage division value of the resistor R9-R10, wherein the voltage division value of the resistor R9-R10 is set according to the DC voltage output by the angle transmitter J2 at 30°;

If the second incident angle signal is less than or equal to the divided voltage value of the resistor R9-R10, it means that the incident angle measured by the second beam analyzer is greater than 0° and less than 30°, and the operational amplifier AR6 cannot output a positive level; , The op amp AR5 itself is used as a follower and plays an isolation role.

In order to send corresponding prompts to the SF6 gas monitoring and control terminal according to the size of the incident angle, the modulated signal generating circuit is used to determine the state that the incident angle measured by the first beam analyzer is greater than 0°, and the incident angle measured by the second beam analyzer is greater than 0°, to determine the generation of sine wave modulation signals with frequencies _f1 , _f2 , _f13 to prompt the SF6 monitoring control terminal. 6 After the gas is vertically injected into the state of the second optical receiving sensor, and the generated sine wave modulation signal is transmitted to the FM transmitting circuit;

When the op amp AR1 outputs a positive level and the op amp AR4 does not output a positive level, that is, the first light source passes through the SF6 gas to be measured and fails to vertically inject into the first optical receiving sensor and the second light source passes through the SF6 gas to be measured and shoots into the second optical receiving sensor vertically, the relay K3 is not conducted, its contact 1 is connected to the contact 2, the relay K4 is not conducted, its contact 1 is connected to the contact 2, the relay K8 is not conducted, the relay K5 is conducted, its contact 1 is connected to the contact 2, the relay K6 is conducted, and its contact 1 is connected to the contact 3. K7 is turned on, its contact 1 is connected to contact 3, and the first oscillating network composed of capacitors C5-C6 and resistors R15-R16 is connected between the non-inverting input terminal of the operational amplifier AR7 and the output terminal of the operational amplifier AR7. The first oscillating network is both a frequency selection network and a positive feedback network, and its frequency selection frequency is Among them, R ₁₅ ＝R ₁₆ ＝R _X , C ₅ ＝C ₆ ＝C _X , due to electric disturbance, the circuit produces an output with a small amplitude, which contains abundant frequencies, because the positive feedback network feeds back the output to the non-inverting input terminal of the operational amplifier AR7 through the first oscillating network as the input signal, so the circuit only produces a positive feedback process for the sine wave with frequency f ₁ , and the signals of other frequencies are rapidly attenuated to zero, so that the sine wave oscillation circuit generates a sine wave with frequency f ₁ A sine wave modulation signal to prompt the first light source to pass through the SF6 gas to be measured and fail to enter the first optical receiving sensor vertically;

When the operational amplifier AR1 does not output a positive level and the operational amplifier AR4 outputs a positive level, that is, the first light source passes through the SF6 gas to be measured and shoots vertically into the first optical receiving sensor, and the second light source passes through the SF6 gas to be measured and fails to shoot vertically into the second optical receiving sensor, the relay K5 is not conducted, the relay K6 is not conducted, its contact 1 is connected to the contact 2, the relay K7 is not conducted, its contact 1 is connected to the contact 2, the relay K3 is conducted, its contact 1 is connected to the contact 3, the relay K4 is conducted, and its contact 1 is connected to the contact 3. K8 is turned on, its contact 1 is connected to contact 2, and the second oscillating network composed of capacitors C9-C10 and resistors R19-R20 is connected between the non-inverting input terminal of the operational amplifier AR7 and the output terminal of the operational amplifier AR7. The second oscillating network is both a frequency selection network and a positive feedback network, and its frequency selection frequency is Among them, R ₁₉ ＝R ₂₀ ＝ _RY , C ₉ ＝C ₁₀ ＝C _Y , due to electrical disturbance, the circuit produces an output with a small amplitude, which contains abundant frequencies, because the positive feedback network feeds back the output to the non-inverting input terminal of the operational amplifier AR7 through the second oscillating network as the input signal, so the circuit only produces positive feedback for the sine wave with frequency f ₂ , and the signals of other frequencies are rapidly attenuated to zero, so that the sine wave oscillating circuit generates frequency f ₂ A sine wave modulation signal to prompt the second light source to pass through the SF6 gas to be measured and fail to enter the first optical receiving sensor vertically;

When the op amp AR1 outputs a positive level and the op amp AR4 outputs a positive level, that is, the first light source passes through the SF6 gas to be measured and fails to vertically inject into the first optical receiving sensor and the second light source passes through the SF6 gas to be measured and fails to enter the second optical receiving sensor vertically, the relay K5 is turned on, its contact 1 is connected to the contact 2, the relay K6 is turned on, its contact 1 is connected to the contact 3, the relay K7 is turned on, its contact 1 is connected to the contact 3, the relay K3 is turned on, its contact 1 is connected to the contact 3, the relay K4 is turned on, and its contact 1 connects the contact 3, the relay K8 conducts, its contact 1 connects the contact 2, and the third oscillating network composed of C7-C8 and resistors R17-R18 is connected between the non-inverting input terminal of the operational amplifier AR7 and the output terminal of the operational amplifier AR7. The third oscillating network is both a frequency selection network and a positive feedback network, and its frequency selection frequency is 其中R ₁₇ ＝R ₁₈ ＝R _Z ，C ₇ ＝C ₈ ＝C _Z ，由于电扰动，电路产生一个幅值很小的输出量，它含有丰富的频率，因为正反馈网络将输出经第三振荡网络反馈至运放器AR7的同相输入端作为输入信号，所以电路只对频率为f ₃的正弦波产生正反馈过程，其它频率的信号均被迅速衰减为零，从而使正弦波振荡电路产生频率为f ₃的正弦波调制信号，以提示第一光源穿过待测SF6气体后未能够垂直射入第一光学接收传感器，且第二光源穿过待测SF6气体后未能够垂直射入第二光学接收传感器。

In order to send corresponding prompts to the SF6 gas monitoring and control terminal according to the size of the incident angle, the FM transmitting circuit is used to determine the generation frequency as f according to the state that the incident angle angle measured by the first beam analyzer is greater than 30°, and the state that the incident angle angle measured by the second beam analyzer is greater than 30°._H1, f_H2local oscillator signal to prompt the SF6 monitoring control terminal first light source to pass through the SF gas to be measured and inject the first optical receiving sensor with an angle of incidence greater than 30 ° and the second light source to pass through the SF gas to be measured and inject the second optical receiving sensor with an angle of incidence greater than 30 °, and modulate the local oscillator signal generated with the sine wave modulation signal output by the modulation signal generation circuit, and transmit it to the SF gas monitoring control terminal after modulation;

The op amp AR8 and resistors R21-R24 are used to form an adding circuit, and the adding circuit adds the output of the op amp AR3 and the output of the op amp AR6, wherein the proportional coefficient of the adding circuit is determined by the ratio of the resistor R22 to the resistor R21;

When the operational amplifier AR3 outputs a positive level or the operational amplifier AR6 outputs a positive level, that is, the incident angle of the first light source passing through the SF6 gas to be measured and entering the first optical receiving sensor is greater than 30° or the incident angle of the second light source passing through the SF6 gas to be measured and entering the second optical receiving sensor is greater than 30°, the adding circuit will output a positive level, so that the relay K9 is turned on, its contact 1 is connected to the contact 3, the relay K10 is turned on, its contact 1 is connected to the contact 3, and the relay K11 is turned on, and its contact 3 is connected. The contact 4 makes the relay K12 conduct, and its contact 1 is connected to the contact 3. The sine wave modulation signal output by the operational amplifier AR7 is transmitted to the base of the transistor Q1 through the second local oscillator network composed of the inductor L4, the varactor diode D6 and the crystal oscillator Y2 in the FM transmitting circuit, and the second frequency selection network composed of the capacitor C14 and the inductor L6 is connected to the collector of the transistor Q1; The equivalent capacitance of D6 changes very sensitively with the reverse voltage applied to both ends, so that the center frequency generated by the crystal oscillator Y2 is f_H2The second local oscillator signal changes accordingly to achieve the purpose of frequency modulation to obtain a second modulated signal. The second modulated signal is frequency-multiplied and amplified by the second frequency-selective network, and then transmitted to the second communication module in the SF6 gas monitoring and control terminal through the antenna E1, and the transistor Q1 uses its switching characteristics to make the second frequency-selective network resonantly amplify the second modulated signal output by the crystal oscillator Y2 when it is turned on.

On the contrary, when both op amp AR3 and op amp AR6 do not output positive level, that is, the incident angle of the first light source passing through the SF6 gas to be measured and entering the first optical receiving sensor is less than 30° and the incident angle of the second light source passing through the SF6 gas to be measured and entering the second optical receiving sensor is less than 30°, the adding circuit does not output, so that the relay K9 is cut off, its contact 1 is connected to the contact 2, the relay K10 is cut off, its contact 1 is connected to the contact 2, and the relay K11 is cut off, and its contact 3 is connected to the contact 5, and the relay K11 is cut off, and its contact 3 is connected to the contact 5. K12 cuts off, its contact 1 connects to contact 2, the sine wave modulation signal output by the operational amplifier AR7 is transmitted to the base of the transistor Q1 through the first local oscillator network composed of the inductor L3, varactor diode D5, and crystal oscillator Y1 in the FM transmitting circuit, and the first frequency selection network composed of the capacitor C13 and the inductor L5 is connected to the collector of the triode Q1; The capacity is extremely sensitive to changes with the reverse voltage applied to both ends, so that the center frequency generated by the crystal oscillator Y1 is f_H1The first local oscillator signal changes accordingly to achieve the purpose of frequency modulation to obtain the first modulated signal. The first modulated signal is frequency-multiplied and amplified by the first frequency-selective network, and then transmitted to the first communication module in the SF6 gas monitoring and control terminal through the antenna E1, and the transistor Q1 utilizes its switching characteristics to make the first frequency-selective network resonate and amplify the first modulated signal output by the crystal oscillator Y1 when it is turned on.

And inductance L3 and inductance L4 are high-frequency choke coils, which can prevent the intrusion of high-frequency signals in the subsequent stage circuit. Resistors R26 and R27 are bias resistors, which jointly determine the base voltage of transistor Q1; resistor R28 is a voltage negative feedback resistor, which is used to suppress the influence of temperature changes on the static operating point of transistor Q1; capacitor C12 is a bypass capacitor, which is used to increase the amplification factor by inputting the AC signal of transistor Q1; Certain frequencies of wireless interference waves at the base are bypassed to the emitter to achieve the effect of eliminating radio wave interference, and the specific frequency is determined by the capacitance of capacitor C11.

The specific structure of the first optical detection circuit, the IN pin of the angle transmitter J1 is connected to the output port of the first beam analyzer, the OUT pin of the angle transmitter J1 is connected to the inductor L1 and one end of the capacitor C1, the other end of the inductor L1 is connected to one end of the capacitor C2, the non-inverting input end of the operational amplifier AR2 and the non-inverting input end of the operational amplifier AR1, the other end of the capacitor C1 is grounded and the other end of the capacitor C2, and one end of the resistor R2, and the other end of the resistor R2 is connected to one end of the resistor R1 and the operational amplifier. The inverting input terminal of the resistor AR1, the other end of the resistor R1 is connected to the power supply +12V, the output terminal of the operational amplifier AR1 is connected to the anode of the diode D1, the cathode of the diode D1 is connected to one end of the resistor R5, the other end of the resistor R5 is connected to the contact 5 of the relay K1, the contact 3 of the relay K5, the contact 4 of the relay K6, and the contact 4 of the relay K7 in the modulation signal generating circuit, the inverting input terminal of the operational amplifier AR2 is connected to the output terminal of the operational amplifier AR2 and the contact 3 of the relay K1, and the contact of the relay K1 1 Connect one end of resistor R3 and resistor R4, the other end of resistor R3 is grounded, the other end of resistor R4 is connected to power supply +12V, contact 6 of relay K1 is grounded, contact 4 of relay K1 is connected to the non-inverting input end of op amp AR3, contact 2 of relay K1 is connected to the inverting input end of op amp AR3, the output end of op amp AR3 is connected to the anode of diode D2, and the cathode of diode D2 is connected to one end of resistor R23 in the FM transmission circuit.

The specific structure of the second optical detection circuit, the IN pin of the angle transmitter J2 is connected to the output port of the second beam analyzer, the OUT pin of the angle transmitter J2 is connected to the inductor L2 and one end of the capacitor C3, the other end of the inductor L2 is connected to one end of the capacitor C4, the non-inverting input end of the operational amplifier AR4 and the non-inverting input end of the operational amplifier AR5, the other end of the capacitor C3 is grounded and connected to the other end of the capacitor C4, and one end of the resistor R8, and the other end of the resistor R8 is connected to one end of the resistor R7 and the operational amplifier. The inverting input terminal of the device AR4, the other end of the resistor R7 is connected to the power supply +12V, the output terminal of the operational amplifier AR4 is connected to the anode of the diode D3, the cathode of the diode D3 is connected to one end of the resistor R11, the other end of the resistor R11 is connected to the contact 5 of the relay K2, the contact 4 of the relay K3 in the modulation signal generating circuit, the contact 4 of the relay K4 and the contact 3 of the relay K8, the inverting input terminal of the operational amplifier AR5 is connected to the output terminal of the operational amplifier AR5 and the contact 3 of the relay K2, and the relay K2 The contact 1 of the relay K2 is connected to the resistor R9, one end of the resistor R10, the other end of the resistor R9 is grounded, the other end of the resistor R10 is connected to the power supply +12V, the contact 6 of the relay K2 is grounded, the contact 4 of the relay K2 is connected to the non-inverting input terminal of the operational amplifier AR6, the contact 2 of the relay K2 is connected to the inverting input terminal of the operational amplifier AR6, the output terminal of the operational amplifier AR6 is connected to the anode of the diode D4, and the cathode of the diode D4 is connected to one end of the resistor R24 in the FM transmission circuit.

The specific structure of the modulation signal generating circuit, the inverting input terminal of the operational amplifier AR7 is connected to one end of the resistor R13 and the resistor R14, the other end of the resistor R13 is grounded, the other end of the resistor R14 is connected to the output terminal of the operational amplifier AR7, the contact 1 of the relay K5, the contact 1 of the relay K8, the contact 3 of the relay K7 and the contact 1 of the relay K9 in the FM transmission circuit, the non-inverting input terminal of the operational amplifier AR7 is connected to the capacitor C5, the capacitor C6, the capacitor C7, the capacitor C8, and the capacitor C 9. One end of capacitor C10 and one end of resistor R15, resistor R17, and resistor R19, the other end of capacitor C5 is grounded and the other end of resistor R15, the other end of capacitor C6 is connected to one end of resistor R16, the other end of resistor R16 is connected to contact 2 of relay K3, the other end of capacitor C7 is grounded to the other end of resistor R17, the other end of capacitor C8 is connected to one end of resistor R18, the other end of resistor R18 is connected to contact 3 of relay K3, resistor R1 The other end of 9 is grounded, the other end of capacitor C9, contact 5 of relay K3, the other end of capacitor C10 is connected to one end of resistor R20, the other end of resistor R20 is connected to contact 2 of relay K6, contact 2 of relay K5 is connected to contact 2 of relay K4, contact 4 of relay K5 is grounded, contact 1 of relay K4 is connected to contact 1 of relay K3, contact 5 of relay K4 is grounded, contact 3 of relay K4 is connected to contact 3 of relay K6, contact 5 of relay K6 is grounded, and contact 1 of relay K6 is connected to ground. Contact 1 of relay K7, contact 5 of relay K7 are grounded, contact 2 of relay K7 is connected to contact 2 of relay K8, and contact 4 of relay K8 is grounded.

The specific structure of the FM transmission circuit is that the contact 5 of the relay K9 is grounded, the contact 3 of the relay K9 is connected to one end of the inductor L4, the other end of the inductor L4 is connected to the cathode of the varactor diode D6 and one end of the crystal oscillator Y2, the anode of the varactor diode D6 is connected to the ground, the other end of the crystal oscillator Y2 is connected to the contact 3 of the relay K10, the contact 2 of the relay K9 is connected to one end of the inductor L3, the other end of the inductor L3 is connected to the cathode of the varactor diode D5 and one end of the crystal oscillator Y1, and the varactor diode D5 The anode of the crystal oscillator Y1 is connected to the contact 2 of the relay K10, the contact 5 of the relay K10 is connected to one end of the resistor R25, the contact 1 of the relay K11, the contact 4 of the relay K12 and the contact 4 of the relay K9, the other end of the resistor R25 is connected to one end of the resistor R22 and the output terminal of the op amp AR8, the other end of the resistor R22 is connected to one end of the resistor R21 and the inverting input of the op amp AR8, the other end of the resistor R21 is grounded, and the op amp The non-inverting input terminal of AR8 is connected to the other end of resistor R23 and the other end of resistor R24, the contact 4 of relay K10 is grounded and one end of resistor R27, the other end of resistor R27 is connected to contact 1 of relay K10, one end of resistor R26, one end of capacitor C11 and the base of transistor Q1, the other end of resistor R26 is connected to power supply +12V and contact 3 of relay K11, the other end of capacitor C11 is connected to capacitor C12 and one of resistor R28 terminal and the emitter of transistor Q1, the other end of capacitor C12 is grounded and the other end of resistor R28, the collector of transistor Q1 is connected to antenna E1 and contact 1 of relay K12, contact 2 of relay K11 is grounded, contact 4 of relay K11 is connected to one end of capacitor C14 and inductor L6, the other end of capacitor C14 is connected to the other end of inductor L6 and contact 3 of relay K12, contact 5 of relay K11 is connected to capacitor C13, one end of inductor L5, capacitor C The other end of 13 is connected to the other end of the inductance L5 and the contact 2 of the relay K12, the contact 5 of the relay K12 is grounded, and the contact 4 of the relay K13 is grounded.

When the present invention is specifically used, the first optical detection circuit uses the operational amplifier AR1 to compare the first incident angle signal output by the first beam analyzer with the divided voltage value of the resistors R1-R2. When the operational amplifier AR1 outputs a positive level, the operational amplifier AR3 is used to compare the first incident angle signal with the divided voltage value of the resistors R3-R4. , use the operational amplifier AR6 to compare the first incident angle signal with the voltage divider value of the resistors R9-R10;

When the operational amplifier AR1 outputs a positive level and the operational amplifier AR4 does not output a positive level, the first oscillating network composed of capacitors C5-C6 and resistors R15-R16 in the modulation signal generating circuit is connected between the non-inverting input terminal of the operational amplifier AR7 and the output terminal of the operational amplifier AR7. Between the output terminals of the amplifier AR7, when the operational amplifier AR1 outputs a positive level and the operational amplifier AR4 outputs a positive level, the third oscillation network composed of capacitors C7-C8 and resistors R17-R18 is connected between the non-inverting input terminal of the operational amplifier AR7 and the output terminal of the operational amplifier AR7. The second local oscillator network is transmitted to the base of the transistor Q1, and the second frequency selection network composed of the capacitor C14 and the inductor L6 is connected to the collector of the transistor Q1. On the contrary, the sine wave modulation signal output by the operational amplifier AR7 is transmitted to the base of the transistor Q1 through the first local oscillator network composed of the inductor L3, the varactor diode D5 and the crystal oscillator Y1 in the FM transmitter circuit, and the first frequency selection network composed of the capacitor C13 and the inductor L5 is connected to the collector of the transistor Q1.

The above is a further detailed description of the present invention in conjunction with specific implementation methods, and it cannot be determined that the specific implementation of the present invention is limited thereto; for those skilled in the art to which the present invention belongs and related technical fields, on the premise of the idea of the technical solution of the present invention, the expansion, operation method, and data replacement should all fall within the protection scope of the present invention.

Claims (5)

1. The SF6 gas optical sensing information monitoring system comprises a first light source emitter, a second light source emitter, a first optical receiving sensor, a second optical receiving sensor, a first light beam analyzer, a second light beam analyzer, an SF6 gas monitoring control terminal and an optical monitoring control terminal, and is characterized in that the first light source emitter generates and emits a first light source, the first light source penetrates through SF6 gas to be detected and then emits a first light source, the second light source generates and emits a second light source, the second light source penetrates through SF6 gas to be detected and then emits into the second optical receiving sensor, the first light beam analyzer measures the incident angle of the first light source emitted into the first optical receiving sensor, the second light beam analyzer measures the incident angle of the second light source emitted into the second optical receiving sensor, and the SF6 gas monitoring control terminal compares the incident angle and sends a prompt to the SF6 gas monitoring control terminal;

the SF6 gas monitoring control terminal comprises a first optical detection circuit, a second optical detection circuit, a modulation signal generation circuit and a frequency modulation transmitting circuit; the first optical detection circuit compares the first incident angle signal output by the first beam analyzer with the voltage division value of the resistors R1-R2 by using the operational amplifier AR1, when the operational amplifier AR1 outputs positive level, the first incident angle signal is compared with the voltage division value of the resistors R3-R4 by using the operational amplifier AR3, the second optical detection circuit compares the second incident angle signal output by the second beam analyzer with the voltage division value of the resistors R7-R8 by using the operational amplifier AR4, when the operational amplifier AR4 outputs positive level, the first incident angle signal is compared with the voltage division value of the resistors R9-R10 by using the operational amplifier AR6, when the operational amplifier AR1 outputs positive level and the operational amplifier AR4 does not output positive level, a first oscillation network composed of the capacitors C5-C6 and the resistors R15-R16 in the modulation signal generation circuit is connected between the in-phase input end of the operational amplifier AR7 and the output end of the operational amplifier AR7, when the operational amplifier AR1 does not output positive level and the operational amplifier AR4 outputs positive level, a second oscillation network composed of capacitors C9-C10 and resistors R19-R20 is connected between the non-inverting input end of the operational amplifier AR7 and the output end of the operational amplifier AR7, when the operational amplifier AR1 outputs positive level and the operational amplifier AR4 outputs positive level, a third oscillation network composed of capacitors C7-C8 and resistors R17-R18 is connected between the non-inverting input end of the operational amplifier AR7 and the output end of the operational amplifier AR7, when the operational amplifier AR3 outputs positive level or the operational amplifier AR6 outputs positive level, a sine wave modulation signal output by the operational amplifier AR7 is transmitted to the base electrode of the triode Q1 through a second local oscillation network composed of an inductor L4, a varactor diode D6 and a crystal oscillator Y2 in a frequency modulation transmitting circuit, and a second frequency selection network composed of the capacitors C14 and the inductor L6 is connected to the collector electrode of the triode Q1, otherwise, the sine wave modulation signal output by the operational amplifier AR7 is transmitted to the base electrode of the triode Q1 through a first local oscillation network composed of an inductor L3, a varactor diode D5 and a crystal oscillator Y1 in the frequency modulation transmitting circuit, and a first frequency selection network composed of a capacitor C13 and an inductor L5 is connected to the collector electrode of the triode Q1.

2. The SF6 gas optical sensing information monitoring system of claim 1, wherein the first optical detection circuit comprises an angle transmitter J1, an IN pin of the angle transmitter J1 is connected to an output port of the first beam analyzer, an OUT pin of the angle transmitter J1 is connected to an inductor L1 and one end of a capacitor C1, the other end of the inductor L1 is connected to a non-inverting input terminal of an operational amplifier AR2 and a non-inverting input terminal of the operational amplifier AR1, the other end of the capacitor C1 is grounded and the other end of the capacitor C2 is connected to one end of a resistor R2, the other end of the resistor R2 is connected to one end of an inverting input terminal of the operational amplifier AR1, the other end of the resistor R1 is connected to +12v, an output of the operational amplifier AR1 is connected to an anode of the diode D1, one end of a cathode of the diode D1 is connected to one end of the resistor R5, the other end of the resistor R5 is connected to a contact 5 of the relay K1, a contact 3 of the relay K5 is connected to the other end of the modulating signal generator circuit, a contact 4 of the relay K6, a contact 4 of the relay K7 is connected to the contact 4 of the relay AR2, the other end of the contact 4 of the operational amplifier AR2 is connected to the other end of the output of the resistor R2 and the other end of the resistor R2 is connected to the other end of the resistor 3, and the other end of the output of the resistor 2 is connected to the output of the resistor 3 is connected to the other end of the output end of the resistor 2 is connected to the output 3.

3. The SF6 gas optical sensing information monitoring system of claim 1, wherein the second optical detection circuit comprises an angle transmitter J2, an IN pin of the angle transmitter J2 is connected with an output port of the second beam analyzer, an OUT pin of the angle transmitter J2 is connected with an inductor L2 and one end of a capacitor C3, the other end of the inductor L2 is connected with an IN-phase input end of an operational amplifier AR4 and an IN-phase input end of an operational amplifier AR5, the other end of the capacitor C3 is connected with the ground and the other end of the capacitor C4, one end of a resistor R8, the other end of the resistor R8 is connected with one end of a resistor R7 and an opposite-phase input end of the operational amplifier AR4, the other end of the resistor R7 is connected with a power supply +12V, the output end of the operational amplifier AR4 is connected with an anode of a diode D3, and a cathode of the diode D3 is connected with one end of a resistor R11, the other end of the resistor R11 is connected with a contact 5 of the relay K2, a contact 4 of the relay K3 of the modulation signal generation circuit, a contact 4 of the relay K4 and a contact 3 of the relay K8, an inverting input end of the operational amplifier AR5 is connected with an output end of the operational amplifier AR5 and the contact 3 of the relay K2, a contact 1 of the relay K2 is connected with one end of the resistor R9 and one end of the resistor R10, the other end of the resistor R9 is grounded, the other end of the resistor R10 is connected with a power supply +12V, a contact 6 of the relay K2 is grounded, a contact 4 of the relay K2 is connected with an IN-phase input end of the operational amplifier AR6, an output end of the operational amplifier AR6 is connected with an anode of the diode D4, and a cathode of the diode D4 is connected with one end of the resistor R24 IN the frequency modulation transmitting circuit.

4. An SF6 gas optical sensing information monitoring system of claim 1, wherein the modulation signal generating circuit comprises an operational amplifier AR7, the inverting input of the operational amplifier AR7 is connected to a resistor R13 and one end of a resistor R14, the other end of the resistor R13 is grounded, the other end of the resistor R14 is connected to the output of the operational amplifier AR7, a contact 1 of a relay K5, a contact 1 of a relay K8, a contact 3 of the relay K7 and a contact 1 of a relay K9 of the frequency modulation transmitting circuit, the non-inverting input of the operational amplifier AR7 is connected to a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, one end of a capacitor C10 and one end of a resistor R15, a resistor R17 and one end of a resistor R19, the other end of the capacitor C5 is grounded and the other end of the resistor R15, the other end of the resistor R16 is connected to one end of the resistor R16, the other end of the resistor R16 is connected to a contact 2 of the relay K3 of the resistor, the other end of the capacitor C7 is grounded and the other end of the resistor R17, the other end of the capacitor C8 is grounded with one end of the resistor R18, the other end of the resistor R18 is grounded with the contact 3 of the relay K3, the other end of the resistor R19 is grounded with the other end of the capacitor C9, the contact 5 of the relay K3, the other end of the capacitor C10 is grounded with one end of the resistor R20, the other end of the resistor R20 is grounded with the contact 2 of the relay K6, the contact 2 of the relay K5 is grounded with the contact 2 of the relay K4, the contact 1 of the relay K4 is grounded with the contact 1 of the relay K3, the contact 5 of the relay K4 is grounded with the contact 5 of the relay K6, the contact 1 of the relay K6 is grounded with the contact 1 of the relay K7, the contact 5 of the relay K7 is grounded with the contact 2 of the relay K8, and the contact 4 of the relay K8 is grounded.

5. An SF6 gas optical sensing information monitoring system according to claim 1, wherein the frequency modulation transmitting circuit comprises a relay K9, a contact 5 of the relay K9 is grounded, a contact 3 of the relay K9 is connected with one end of an inductor L4, the other end of the inductor L4 is connected with a cathode of a varactor D6 and one end of a crystal oscillator Y2, an anode of the varactor D6 is grounded, the other end of the crystal oscillator Y2 is connected with a contact 3 of a relay K10, a contact 2 of the relay K9 is connected with one end of the inductor L3, the other end of the inductor L3 is connected with a cathode of a varactor D5 and one end of a crystal oscillator Y1, the other end of the varactor D5 is grounded, the other end of the crystal oscillator Y1 is connected with a contact 2 of a relay K10, a contact 5 of the relay K10 is connected with one end of a resistor R25, a contact 1 of a relay K11, a contact 4 of a relay K12 and a contact 4 of the relay K9, one end of a resistor R25 is connected with an output end of an operational amplifier AR8, the other end of the resistor R22 is connected with one end of the resistor R21 and the inverting input end of the operational amplifier AR8, the other end of the resistor R21 is grounded, the non-inverting input end of the operational amplifier AR8 is connected with the other end of the resistor R23 and the other end of the resistor R24, the contact 4 of the relay K10 is grounded and one end of the resistor R27 is connected with the contact 1 of the relay K10, one end of the resistor R26, one end of the capacitor C11 and the base electrode of the triode Q1, the other end of the resistor R26 is connected with the power +12V and the contact 3 of the relay K11, the other end of the capacitor C11 is connected with the capacitor C12, one end of the resistor R28 and the emitter of the triode Q1, the other end of the capacitor C12 is grounded and the other end of the resistor R28, the collector of the triode Q1 is connected with the antenna E1 and the contact 1 of the relay K12, the contact 2 of the relay K11 is grounded, the contact 4 of the relay K11 is connected with one end of the capacitor C14 and the inductor L6, the other end of the capacitor C14 is connected with the other end of the inductor L6 and the contact 3 of the relay K12, the contact 5 of the relay K11 is connected with the capacitor C13 and one end of the inductor L5, the other end of the capacitor C13 is connected with the other end of the inductor L5 and the contact 2 of the relay K12, the contact 5 of the relay K12 is grounded, and the contact 4 of the relay K13 is grounded.