CN104165657A - Sulfur hexafluoride gas micro-water density integrated monitoring device - Google Patents
Sulfur hexafluoride gas micro-water density integrated monitoring device Download PDFInfo
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- CN104165657A CN104165657A CN201410438380.7A CN201410438380A CN104165657A CN 104165657 A CN104165657 A CN 104165657A CN 201410438380 A CN201410438380 A CN 201410438380A CN 104165657 A CN104165657 A CN 104165657A
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Abstract
The invention discloses a sulfur hexafluoride gas micro-water density integrated monitoring device which comprises a central control circuit, an LED display interface circuit, a sensor input signal circuit, a power circuit, a communication circuit and an active microwave sensing circuit. The LED display interface circuit, the sensor input signal circuit, the power circuit, the communication circuit and the active microwave sensing circuit are all connected with the central control circuit. The LED display interface circuit displays sulfur hexafluoride gas micro-water density parameters sent by the central control circuit. The sensor input signal circuit is connected with a measuring sensor, and the power circuit is connected with an external power source. The communication circuit enables the central control circuit to be in communication with an outside intelligent electronic device, and the active microwave sensing circuit detects whether working personnel conduct routing inspection or not. The sulfur hexafluoride gas micro-water density integrated monitoring device has the advantages of being capable of monitoring the parameters such as the micro-water content and the pressure of SF6 gas in real time, preventing equipment from being burnt or power failure accidents, and the like.
Description
Technical field
The present invention relates to the micro-water-mass density composite monitoring device of a kind of sulfur hexafluoride gas.
Background technology
Sulfur hexafluoride (SF
6) gas is as a kind of fluoride, be not only and destroy earth's ozone layer and produce one of harmful gas of greenhouse effect, and sulfur hexafluoride breaker is after divide-shut brake arcing, can decomposite multiple noxious material, directly affects the healthy of Site Detection personnel.Meanwhile, when the water cut of sulfur hexafluoride gas is too high, the safe operation of entail dangers to electrical equipment, is mainly manifested in the analyte of sulfur hexafluoride gas under electric arc and meets water and chemical reaction can occur generate HF and the H with severe corrosive
2sO
3deng, meeting corrosion and damage insulating part; When temperature reduces, may form condensation water, make insulating part surface insulation intensity significantly reduce even flashover.
Existing detection SF
6the method of gas micro water content, as gravimetric method, electrolytic process, dew point method etc. all belong to off-line preventive test, is the measurement of carrying out under atmospheric pressure after decompression.These methods are owing to having ignored the variation of combined electrical apparatus, the variation of high-voltage switch gear external and internal pressure and tested sulfur hexafluoride gas medium, actual value in micro-water number that sampled point records and combined electrical apparatus, high-voltage switch gear is easy to produce deviation, and measurement result cannot accurately represent the true humidity situation in combined electrical apparatus, high-voltage switch gear.The micro-water content of on-line monitoring sulfur hexafluoride gas can be grasped at any time the variation of gas water content and report to the police in good time, is convenient to the control of electric equipment under operation conditions.
Summary of the invention
The present invention is the weak point existing in above-mentioned prior art for avoiding, and provides a kind of sulfur hexafluoride gas micro-water-mass density composite monitoring device, with Real-Time Monitoring SF
6the parameters such as the micro-water content of gas, pressure, density, temperature, avoid because micro-water content raises, SF
6the equipment burnout that Leakage Gas etc. cause or power outage.
The present invention be technical solution problem by the following technical solutions.
The micro-water-mass density composite monitoring device of sulfur hexafluoride gas, its design feature is to comprise central control circuit, LED display interface circuit, sensor input signal circuit, power circuit, communicating circuit and active microwave sensor circuit; Described LED display interface circuit, sensor input signal circuit, power circuit, communicating circuit and active microwave sensor circuit are all connected with described central control circuit;
Described LED display interface circuit, includes a display screen, for the micro-water-mass density parameter of sulfur hexafluoride gas that shows that central control circuit sends;
Described sensor input signal circuit, for connecting survey sensor, and sends to central control circuit after the measuring-signal of survey sensor is processed;
Described power circuit, for connecting external power source, and carries out after step-down processing as central control circuit, LED display interface circuit, sensor input signal circuit, communicating circuit and active microwave sensor circuit provide working power external power source;
Described communicating circuit, for make central control circuit can with the intercommunication of outside intelligent electronic device;
Whether described active microwave sensor circuit, for detection of having staff to patrol and examine, notify central control circuit Real-time Collection sulfur hexafluoride gas micro-water-mass density parameter when having staff to patrol and examine, and in the demonstration screen display real time data of LED display interface circuit.
The design feature of the micro-water-mass density composite monitoring device of sulfur hexafluoride gas of the present invention is also:
Described central control circuit comprises single-chip microcomputer U1; Described single-chip microcomputer U1 is connected with reset circuit, 3V power circuit, system clock circuit, outer clock circuit and indicator light circuit; Described reset circuit comprises reset chip U8, resistance R 21, resistance R 24, capacitor C 21; Described reset chip U8 is connected with described single-chip microcomputer U1; The two ends of described resistance R 21 are connected on the GND terminal and RSET terminal of described reset chip U8, the two ends of described resistance R 24 are connected on the VCC terminal and MR terminal of described reset chip U8, the two ends of described capacitor C 21 are also connected on the VCC terminal and MR terminal of described reset chip U8, and the VCC connecting terminals of reset chip U8 connects the 3.3V power vd D terminal of single-chip microcomputer U1;
Described 3V power circuit comprises 3V battery BATT, diode D21 and diode D22; The minus earth of described 3V battery BATT, the positive pole of described 3V battery BATT connects the positive pole of described diode D22, the negative pole of described diode D22 connects the VBAT terminal of single-chip microcomputer U1, the negative pole of described diode D21 is also connected with the VBAT terminal of single-chip microcomputer U1, and the positive pole of described diode D21 connects the 3.3V power vd D terminal of single-chip microcomputer U1;
Described system clock circuit comprises capacitor C 31, capacitor C 32 and crystal oscillator Y2; Ground connection after one end of one end of described capacitor C 31 and described capacitor C 32 is connected, the RTCX_1 terminal of the other end single-chip microcomputer U1 of described capacitor C 31, the RTCX_0 terminal of the other end single-chip microcomputer U1 of described capacitor C 32, the two ends of described crystal oscillator Y2 are connected on the RTCX_1 terminal of single-chip microcomputer U1 and the RTCX_0 terminal of single-chip microcomputer U1;
Described outer clock circuit comprises capacitor C 33, capacitor C 34 and crystal oscillator Y1; Ground connection after one end of one end of described capacitor C 33 and described capacitor C 34 is connected, the XTAL_1 terminal of the other end single-chip microcomputer U1 of described capacitor C 33, the XTAL_0 terminal of the other end single-chip microcomputer U1 of described capacitor C 34, the two ends of described crystal oscillator Y1 are connected on the XTAL_1 terminal of single-chip microcomputer U1 and the XTAL_0 terminal of single-chip microcomputer U1;
Described indicator light circuit comprises resistance R 25 and light emitting diode D23; The minus earth of described light emitting diode D23, the positive pole of described light emitting diode D23 is connected with described single-chip microcomputer U1 by described resistance R 25.
Described LED display interface circuit comprises chip U9, capacitor C 303～capacitor C 306 and 4 needle interface J10; Described chip U9 is connected with described single-chip microcomputer U1, and it is upper that the two ends of described capacitor C 303～capacitor C 306 are all connected to chip U9, and that described chip U9 is MAX3232ESA; Described 4 needle interface J10 are connected with described chip U9, and LCDs is connected with chip U9 by 4 needle interface J10.
Described sensor input signal circuit comprises the first bleeder circuit, the second bleeder circuit and the 3rd bleeder circuit; Described the first bleeder circuit comprises swept resistance R304 and 3 needle interface J6; One end ground connection of described swept resistance R304, the other end of described swept resistance R304 is all connected with described 3 needle interface J6 with sliding end; Described 3 needle interface J6 are connected with described single-chip microcomputer U1;
Described the first bleeder circuit comprises swept resistance R305 and 3 needle interface J7; One end ground connection of described swept resistance R305, the other end of described swept resistance R305 is all connected with described 3 needle interface J7 with sliding end; Described 3 needle interface J7 are connected with described single-chip microcomputer U1;
Described the 3rd bleeder circuit resistance R 306 and 3 needle interface J8; One end ground connection of described resistance R 306, the other end of described resistance R 306 is connected with described 3 needle interface J8, and connects power supply VCC; Described 3 needle interface J8 are connected with described single-chip microcomputer U1;
Described power circuit comprises for the first power circuit of provide+5V voltage with for the second source circuit of provide+3.3V voltage;
Described the first power circuit comprises power supply chip U3, resistance R 26, capacitor C 10～capacitor C 14, diode D3, light emitting diode D24 and inductance L 2; The VIN terminal connection+24V direct supply of described power supply chip U3, the GND terminal ground connection of described power supply chip U3, one end of described capacitor C 10～capacitor C 12 connects the VIN terminal of power supply chip U3, the other end ground connection of described capacitor C 10～capacitor C 12; The negative pole of described diode D3 connects the VOUT terminal of power supply chip U3, the plus earth of diode D3; One end of described inductance L 2 connects the VOUT terminal of power supply chip U3, and the other end of inductance L 2 connects the FEEDBACK terminal of power supply chip U3, and the FEEDBACK terminal of described power supply chip U3 is VDD5V output terminal; One end of described capacitor C 13～capacitor C 14 connects the FEEDBACK terminal of power supply chip U3, other end ground connection; One end of described resistance R 26 connects the FEEDBACK terminal of power supply chip U3, and the other end is by described light emitting diode D24 ground connection;
Described second source circuit comprises power supply chip U4, resistance R 11～R13, resistance R 27, capacitor C 15～capacitor C 19, diode D4, light emitting diode D25; The IN terminal of described power supply chip U4 connects the VDD5V direct supply of the first power circuit output, the GND terminal ground connection of described power supply chip U4; The positive pole of described diode D4 and negative pole are connected on the OUT terminal and IN terminal of described power supply chip U4; One end ground connection of described resistance R 11, the other end of described resistance R 11 is connected with the positive pole of diode D4 by resistance R 12, resistance R 13 successively, and described resistance R 11 is connected with the ADJ terminal of power supply chip U4 with the tie point between resistance R 12; Described capacitor C 15 is connected in the two ends of described resistance R 13 in parallel; One end ground connection between described capacitor C 16～capacitor C 19 after connection parallel with one another, the other end is connected with the positive pole of diode D4; One end of described resistance R 27 is connected with the positive pole of diode D4, and the other end is by light emitting diode D25 ground connection.
Described communicating circuit comprises communication chip U2, bi-directional voltage stabilizing pipe ESD2, resistance R 601～R605, triode Q1, fuse F7 and fuse F8; The two ends of described resistance R 601 are connected in the base stage and emitter of described triode Q1, the grounded emitter of described triode Q1, and the collector of described triode Q is connected with communication chip U2; One end of described resistance R 602 is connected with the base stage of triode Q1, and the other end is connected with described single-chip microcomputer U1; One end of described resistance R 603 is connected with the collector of triode Q1, and the other end is connected with described 5V power vd D; One end of described resistance R 604 is connected with communication chip U2 and is connected with resistance R 605 one end, and the other end is connected with described single-chip microcomputer U1;
Described bi-directional voltage stabilizing pipe ESD2 is connected with communication chip U2, and described fuse F7 is all connected with described communication chip U2 with fuse F8.
Described active microwave sensor circuit comprises triode Q5,3 needle interface J9, resistance R 701 and resistance R 702;
One end connection+12V power supply of described resistance R 701 and being connected with 3 needle interface J9, the collector of the other end connecting triode Q5 of described R701 is also connected with described single-chip microcomputer U1; One end of described resistance R 702 is connected with 3 needle interface J9, the base stage of the other end connecting triode Q5 of described R702; The grounded emitter of described triode Q5 is also connected with 3 needle interface J9.
Compared with the prior art, beneficial effect of the present invention is embodied in:
The micro-water-mass density composite monitoring device of sulfur hexafluoride gas of the present invention, connects power supply and inflatable interface (docking valve, aeration valve).Composite monitoring device comprises the central control circuit that drives each module running, the power circuit that monitoring device electric energy is provided to provide with central control circuit, the sensor input signal circuit in order to detection being connected with central control circuit and the intelligent electronic device (IED) being connected with central control circuit by communicating circuit, to further process, detect data, described sensor input signal circuit connection is arranged on the dew point transducer in a measurement air chamber, pressure transducer and temperature sensor, described air chamber is connected to obtain gas to be measured with inflatable interface.This composite monitoring device can Real-Time Monitoring SF
6the micro-water content of gas, pressure, density, temperature, understand SF
6the changing condition such as micro-water, pressure in gas, has reduced because micro-water content raises, SF
6the generation of the accidents such as the high pressure that Leakage Gas etc. cause burns, grid power blackout may.The micro-water-mass density composite monitoring device of sulfur hexafluoride gas is provided with a hummer and connects with central control circuit.
This monitoring device has changed the detection method of traditional sulfur hexafluoride, has greatly reduced the discharge capacity of sulfur hexafluoride gas, and this is to the healthy of safeguard work personnel and alleviate environmental pollution, ensures that the safe operation of electrical equipment has very important meaning.The insulating medium SF of transformer station's inner high voltage equipment
6gas micro water content, pressure, density, the real time monitoring of temperature, particularly relate to a kind of high-voltage switch gear, GIS (GAS INSULATED SWITCHGEAR, Cubicle Gas-Insulated Switchgear), HGIS (Hybrid Gas Insulated Switchgear, Cubicle Gas-Insulated Switchgear) the SF6 gas small water density synthetic monitoring device of high-tension apparatus such as, high-voltage switch gear for transformer station, GIS, the micro-water content of SF6 gas in the airtight tank body of the primary equipments such as HGIS, pressure, density, the Real-Time Monitoring of temperature, liquid crystal display on the spot, transfinite and self check fault audible alarm.
The micro-water-mass density composite monitoring device of sulfur hexafluoride gas of the present invention, having can Real-Time Monitoring SF
6the parameters such as the micro-water content of gas, pressure, density, temperature, avoid because micro-water content raises, SF
6the advantages such as the equipment burnout that Leakage Gas etc. cause or power outage.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the micro-water-mass density composite monitoring device of sulfur hexafluoride gas of the present invention.
Fig. 2 is the circuit diagram of the central control circuit of the micro-water-mass density composite monitoring device of sulfur hexafluoride gas of the present invention.
Fig. 3 is the circuit diagram of the LED display interface circuit of the micro-water-mass density composite monitoring device of sulfur hexafluoride gas of the present invention.
Fig. 4 is the circuit diagram of the sensor input signal circuit of the micro-water-mass density composite monitoring device of sulfur hexafluoride gas of the present invention.
Fig. 5-1 is the circuit diagram of the first power circuit of the micro-water-mass density composite monitoring device of sulfur hexafluoride gas of the present invention.
Fig. 5-2 are the circuit diagram of the second source circuit of the micro-water-mass density composite monitoring device of sulfur hexafluoride gas of the present invention.
Fig. 6 is the circuit diagram of the communicating circuit of the micro-water-mass density composite monitoring device of sulfur hexafluoride gas of the present invention.
Fig. 7 is the circuit diagram of the active microwave sensor circuit of the micro-water-mass density composite monitoring device of sulfur hexafluoride gas of the present invention.
Below pass through embodiment, and the invention will be further described by reference to the accompanying drawings.
Embodiment
Referring to accompanying drawing 1～Fig. 7, the micro-water-mass density composite monitoring device of sulfur hexafluoride gas of the present invention, comprises central control circuit, LED display interface circuit, sensor input signal circuit, power circuit, communicating circuit and active microwave sensor circuit; Described LED display interface circuit, sensor input signal circuit, power circuit, communicating circuit and active microwave sensor circuit are all connected with described central control circuit;
Described LED display interface circuit, includes a display screen, for the micro-water-mass density parameter of sulfur hexafluoride gas that shows that central control circuit sends;
Described sensor input signal circuit, for connecting survey sensor, and sends to central control circuit after the measuring-signal of survey sensor is processed;
Described power circuit, for connecting external power source, and carries out after step-down processing as central control circuit, LED display interface circuit, sensor input signal circuit, communicating circuit and active microwave sensor circuit provide working power external power source;
Described communicating circuit, for make central control circuit can with the intercommunication of outside intelligent electronic device;
Whether described active microwave sensor circuit, for detection of having staff to patrol and examine, notify central control circuit Real-time Collection sulfur hexafluoride gas micro-water-mass density parameter when having staff to patrol and examine, and in the demonstration screen display real time data of LED display interface circuit.
As shown in Figure 2, described central control circuit comprises single-chip microcomputer U1; Described single-chip microcomputer U1 is connected with reset circuit, 3V power circuit, system clock circuit, outer clock circuit and indicator light circuit; Described reset circuit comprises reset chip U8, resistance R 21, resistance R 24, capacitor C 21; Described reset chip U8 is connected with described single-chip microcomputer U1; The two ends of described resistance R 21 are connected on the GND terminal and RSET terminal of described reset chip U8, the two ends of described resistance R 24 are connected on the VCC terminal and MR terminal of described reset chip U8, the two ends of described capacitor C 21 are also connected on the VCC terminal and MR terminal of described reset chip U8, and the VCC connecting terminals of reset chip U8 connects the 3.3V power vd D terminal of single-chip microcomputer U1;
Described 3V power circuit comprises 3V battery BATT, diode D21 and diode D22; The minus earth of described 3V battery BATT, the positive pole of described 3V battery BATT connects the positive pole of described diode D22, the negative pole of described diode D22 connects the VBAT terminal of single-chip microcomputer U1, the negative pole of described diode D21 is also connected with the VBAT terminal of single-chip microcomputer U1, and the positive pole of described diode D21 connects the 3.3V power vd D terminal of single-chip microcomputer U1;
Described system clock circuit comprises capacitor C 31, capacitor C 32 and crystal oscillator Y2; Ground connection after one end of one end of described capacitor C 31 and described capacitor C 32 is connected, the RTCX_1 terminal of the other end single-chip microcomputer U1 of described capacitor C 31, the RTCX_0 terminal of the other end single-chip microcomputer U1 of described capacitor C 32, the two ends of described crystal oscillator Y2 are connected on the RTCX_1 terminal of single-chip microcomputer U1 and the RTCX_0 terminal of single-chip microcomputer U1;
Described outer clock circuit comprises capacitor C 33, capacitor C 34 and crystal oscillator Y1; Ground connection after one end of one end of described capacitor C 33 and described capacitor C 34 is connected, the XTAL_1 terminal of the other end single-chip microcomputer U1 of described capacitor C 33, the XTAL_0 terminal of the other end single-chip microcomputer U1 of described capacitor C 34, the two ends of described crystal oscillator Y1 are connected on the XTAL_1 terminal of single-chip microcomputer U1 and the XTAL_0 terminal of single-chip microcomputer U1;
Described indicator light circuit comprises resistance R 25 and light emitting diode D23; The minus earth of described light emitting diode D23, the positive pole of described light emitting diode D23 is connected with described single-chip microcomputer U1 by described resistance R 25.
Described reset chip U8 is SGM811.Described single-chip microcomputer U1 provides reliable and stable running environment for monitoring device of the present invention; Connection between U1, U8 and each components and parts as shown in Figure 2.The pulse signal that outer clock circuit is used external oscillator to produce is worked for multi-disc single-chip microcomputer simultaneously, so that synchronous between multi-disc single-chip microcomputer.System clock circuit be single-chip microcomputer inside by one for forming the high-gain inverting amplifier of oscillator, quartz oscillator Y2 and two trimmers, formed a stable self-excited oscillator.3V battery BATT provides 3V power supply for single-chip microcomputer U1.When single-chip microcomputer U1 switches on power, for light emitting diode D23 positive pole provides a voltage, light light emitting diode D23.
As shown in Figure 3, described LED display interface circuit comprises chip U9, capacitor C 303～capacitor C 306 and 4 needle interface J10; Described chip U9 is connected with described single-chip microcomputer U1, and it is upper that the two ends of described capacitor C 303～capacitor C 306 are all connected to chip U9, and that described chip U9 is MAX3232ESA; Described 4 needle interface J10 are connected with described chip U9, and LCDs is connected with chip U9 by 4 needle interface J10.
Max3232 adopts proprietary low voltage difference transmitter output stage, utilizes dual charge pump can realize real RS-232 performance when 3.0V to 5.5V Power supply, and device only needs the outside small size charge pump electric capacity of four 0.1uF.Max3232 guarantees the data rate at 120kbps, keeps RS-232 output level simultaneously.
Max3232 has receiver He Er road, No. two drivers, and 1uA shutdown mode is provided, and effectively reduces effect and postpones the battery of portable product.Under shutdown mode, the receiver state of remaining valid, monitors external unit, only consumes 1uA source current, and the pin of max3232, encapsulation and function are compatible with industrial standard MAX242 and MAX232 respectively.Even if be operated under high data rate, the minimum transmitter output voltage of positive and negative 5.0V that max3232 still can keep rs-232 standard to require.By RS232 serial ports, connect LED display, with the data that show that in real time single-chip microcomputer provides.
As shown in Figure 4, described sensor input signal circuit comprises the first bleeder circuit, the second bleeder circuit and the 3rd bleeder circuit; Described the first bleeder circuit comprises swept resistance R304 and 3 needle interface J6; One end ground connection of described swept resistance R304, the other end of described swept resistance R304 is all connected with described 3 needle interface J6 with sliding end; Described 3 needle interface J6 are connected with described single-chip microcomputer U1;
Described the first bleeder circuit comprises swept resistance R305 and 3 needle interface J7; One end ground connection of described swept resistance R305, the other end of described swept resistance R305 is all connected with described 3 needle interface J7 with sliding end; Described 3 needle interface J7 are connected with described single-chip microcomputer U1;
Described the 3rd bleeder circuit resistance R 306 and 3 needle interface J8; One end ground connection of described resistance R 306, the other end of described resistance R 306 is connected with described 3 needle interface J8, and connects power supply VCC; Described 3 needle interface J8 are connected with described single-chip microcomputer U1;
By three bleeder circuits, connect survey sensor, the simulating signal that survey sensor is recorded carries out issuing single-chip microcomputer after voltage division processing, realizes the Real-time Collection of parameter.Described 3 needle interfaces are connected with the signal end of sensor, to obtain the measuring-signal of sensor.Swept resistance is realized dividing potential drop object, and the signal after processing is issued to single-chip microcomputer U1.
As shown in Fig. 5-1 and 5-2, described power circuit comprises for the first power circuit of provide+5V voltage with for the second source circuit of provide+3.3V voltage;
As shown in Fig. 5-1, described the first power circuit comprises power supply chip U3, resistance R 26, capacitor C 10～capacitor C 14, diode D3, light emitting diode D24 and inductance L 2; The VIN terminal connection+24V direct supply of described power supply chip U3, the GND terminal ground connection of described power supply chip U3, one end of described capacitor C 10～capacitor C 12 connects the VIN terminal of power supply chip U3, the other end ground connection of described capacitor C 10～capacitor C 12; The negative pole of described diode D3 connects the VOUT terminal of power supply chip U3, the plus earth of diode D3; One end of described inductance L 2 connects the VOUT terminal of power supply chip U3, and the other end of inductance L 2 connects the FEEDBACK terminal of power supply chip U3, and the FEEDBACK terminal of described power supply chip U3 is VDD5V output terminal; One end of described capacitor C 13～capacitor C 14 connects the FEEDBACK terminal of power supply chip U3, other end ground connection; One end of described resistance R 26 connects the FEEDBACK terminal of power supply chip U3, and the other end is by described light emitting diode D24 ground connection;
As shown in Fig. 5-2, described second source circuit comprises power supply chip U4, resistance R 11～R13, resistance R 27, capacitor C 15～capacitor C 19, diode D4, light emitting diode D25; The IN terminal of described power supply chip U4 connects the VDD5V direct supply of the first power circuit output, the GND terminal ground connection of described power supply chip U4; The positive pole of described diode D4 and negative pole are connected on the OUT terminal and IN terminal of described power supply chip U4; One end ground connection of described resistance R 11, the other end of described resistance R 11 is connected with the positive pole of diode D4 by resistance R 12, resistance R 13 successively, and described resistance R 11 is connected with the ADJ terminal of power supply chip U4 with the tie point between resistance R 12; Described capacitor C 15 is connected in the two ends of described resistance R 13 in parallel; One end ground connection between described capacitor C 16～capacitor C 19 after connection parallel with one another, the other end is connected with the positive pole of diode D4; One end of described resistance R 27 is connected with the positive pole of diode D4, and the other end is by light emitting diode D25 ground connection.
The first power circuit is provide+5V of system power supply, and second source circuit is provide+3.3V of system power supply.Two power circuits are power light by two light emitting diodes.By two power circuits, provide stable working power for LED display, sensor and single-chip microcomputer.
As shown in Figure 6, described communicating circuit comprises communication chip U2, bi-directional voltage stabilizing pipe ESD2, resistance R 601～R605, triode Q1, fuse F7 and fuse F8; The two ends of described resistance R 601 are connected in the base stage and emitter of described triode Q1, the grounded emitter of described triode Q1, and the collector of described triode Q is connected with communication chip U2; One end of described resistance R 602 is connected with the base stage of triode Q1, and the other end is connected with described single-chip microcomputer U1; One end of described resistance R 603 is connected with the collector of triode Q1, and the other end is connected with described 5V power vd D; One end of described resistance R 604 is connected with communication chip U2 and is connected with resistance R 605 one end, and the other end is connected with described single-chip microcomputer U1;
Described bi-directional voltage stabilizing pipe ESD2 is connected with communication chip U2, and described fuse F7 is all connected with described communication chip U2 with fuse F8.
As shown in Figure 6, this circuit is for sending reliable data to host computer in real time for annexation between each parts of described communicating circuit.
As shown in Figure 7, described active microwave sensor circuit comprises triode Q5,3 needle interface J9, resistance R 701 and resistance R 702;
One end connection+12V power supply of described resistance R 701 and being connected with 3 needle interface J9, the collector of the other end connecting triode Q5 of described R701 is also connected with described single-chip microcomputer U1; One end of described resistance R 702 is connected with 3 needle interface J9, the base stage of the other end connecting triode Q5 of described R702; The grounded emitter of described triode Q5 is also connected with 3 needle interface J9.
The micro-water-mass density composite monitoring device of sulfur hexafluoride gas of the present invention, the external dc power adapter power supply described in central control circuit is for to described SF
6gas small water density synthetic monitor provides power supply, described SF
6the gas small water density synthetic monitor communication interface that was connected with intelligent electronic device is realized the photoelectricity isolation of RS485 communication.
SF of the present invention
6the structural representation of gas small water density synthetic monitoring device as shown in Figure 1.The 24V direct current external power adapter that central control circuit connects is used for to described SF
6gas small water density synthetic monitor provides power supply, described SF
6the gas small water density synthetic monitor docking valve that was connected with high-voltage switch gear, GIS, HGIS equipment is realized SF
6being written into of gas, described high-voltage switch gear, GIS, HGIS equipment pass through SF
6the aeration valve of gas small water density synthetic monitor carries out SF
6gas make-up and off-line measurement.It is SF that rain cover is set
6the micro-water pressure density of gas comprehensive monitor outdoor water-proof outer cover.
Described central control circuit is selected the low-power consumption 32-bit microprocessor that has adopted Tail-Chaining interrupt techniques.Described RS485 communication interface is selected photoelectricity isolation unified communications module, has that volume is little, the feature of strong interference immunity.
When staff makes an inspection tour high-voltage switch gear, GIS, HGIS equipment, pass through or rest on SF
6gas small water density synthetic monitor the place ahead, the microwave signal that active microwave sensor circuit is launched is responded to by human motion, active microwave sensor circuit receives the movable signal of reflection, after central control circuit analyzing and processing, controls LED LCD MODULE and shows SF
6the monitoring parameter value that gas small water density synthetic monitor is real-time and state analysis result, such as micro-water content 30ppm, pressure 0.62MPa, 28 degrees Celsius of temperature, state are normal.Reach staff by LCD MODULE on the spot prompts status messages be directly acquainted with the insulation status of high-voltage switch gear, GIS, HGIS equipment, increase work efficiency.
Whether monitoring state information normal hummer, by the prompting of hummer sound different frequency, be beneficial to staff by ear directly judgement be that abnormal or SF appear in the insulation status of high-voltage switch gear, GIS, HGIS equipment
6gas small water density synthetic monitor self duty occurs abnormal, to installing itself, carries out self check, is beneficial to staff timely to SF
6gas small water density synthetic monitor is safeguarded.Staff can remove warning by reset switch after understanding buzzer warning reason.
Described aeration valve is used for the airtight gas tank tonifying Qi of the high-tension apparatuses such as high-voltage switch gear, GIS, HGIS, and described docking valve is for SF
6between the high-tension apparatuses such as gas small water density synthetic monitor and high-voltage switch gear, GIS, HGIS, gas circuit is connected and carries out gas exchange, and described rain cover is for to SF
6the outdoor waterproof protection of gas small water density synthetic monitor.
The micro-water-mass density composite monitoring device of sulfur hexafluoride gas of the present invention, can Real-Time Monitoring SF
6the micro-water content of gas, pressure, density, temperature, understand SF
6the changing condition such as micro-water, pressure in gas, has reduced because micro-water content raises, SF
6the generation of the accidents such as the high pressure that Leakage Gas etc. cause burns, grid power blackout may.
For to SF in the airtight gas tanks of high-tension apparatus such as high-voltage switch gear, GIS, HGIS
6the monitoring of gas, the invention provides a kind of SF6 gas small water density synthetic monitoring device, can Real-Time Monitoring SF
6the micro-water content of gas, pressure, density, temperature, understand in SF6 gas the changing conditions such as micro-water, pressure, reduced because micro-water content raises, SF
6the SF that Leakage Gas etc. cause
6the generation of the accidents such as high-voltage switch gear, GIS, HGIS equipment burnout, power failure may, in the accident of stopping, cause the have a power failure social harmful effect that causes and the production loss of social undertakings.
The micro-water-mass density composite monitoring device of sulfur hexafluoride gas of the present invention, connects power supply and inflatable interface (docking valve, aeration valve).Composite monitoring device comprises the central control circuit that drives each module running, the power circuit that monitoring device electric energy is provided to provide with central control circuit, the sensor input signal circuit in order to detection being connected with central control circuit and the intelligent electronic device (IED) being connected with central control circuit by communicating circuit, to further process, detect data, described sensor input signal circuit connection is arranged on the dew point transducer in a measurement air chamber, pressure transducer and temperature sensor, described air chamber is connected to obtain gas to be measured with inflatable interface.This composite monitoring device can Real-Time Monitoring SF
6the micro-water content of gas, pressure, density, temperature, understand SF
6the changing condition such as micro-water, pressure in gas, has reduced because micro-water content raises, SF
6the generation of the accidents such as the high pressure that Leakage Gas etc. cause burns, grid power blackout may.The micro-water-mass density composite monitoring device of sulfur hexafluoride gas is provided with a hummer and connects with central control circuit.
Embodiment recited above is described the preferred embodiment of the present invention, not the spirit and scope of the present invention is limited.Do not departing under the prerequisite of design concept of the present invention; various modification and improvement that this area ordinary person makes technical scheme of the present invention; all should drop into protection scope of the present invention, the technology contents that the present invention asks for protection, is all documented in claims.
Claims (7)
1. the micro-water-mass density composite monitoring device of sulfur hexafluoride gas, is characterized in that, comprises central control circuit, LED display interface circuit, sensor input signal circuit, power circuit, communicating circuit and active microwave sensor circuit; Described LED display interface circuit, sensor input signal circuit, power circuit, communicating circuit and active microwave sensor circuit are all connected with described central control circuit;
Described LED display interface circuit, includes a display screen, for the micro-water-mass density parameter of sulfur hexafluoride gas that shows that central control circuit sends;
Described sensor input signal circuit, for connecting survey sensor, and sends to central control circuit after the measuring-signal of survey sensor is processed;
Described power circuit, for connecting external power source, and carries out after step-down processing as central control circuit, LED display interface circuit, sensor input signal circuit, communicating circuit and active microwave sensor circuit provide working power external power source;
Described communicating circuit, for make central control circuit can with the intercommunication of outside intelligent electronic device;
Whether described active microwave sensor circuit, for detection of having staff to patrol and examine, notify central control circuit Real-time Collection sulfur hexafluoride gas micro-water-mass density parameter when having staff to patrol and examine, and in the demonstration screen display real time data of LED display interface circuit.
2. the micro-water-mass density composite monitoring device of sulfur hexafluoride gas according to claim 1, is characterized in that, (as shown in Figure 2), described central control circuit comprised single-chip microcomputer U1; Described single-chip microcomputer U1 is connected with reset circuit, 3V power circuit, system clock circuit, outer clock circuit and indicator light circuit; Described reset circuit comprises reset chip U8, resistance R 21, resistance R 24, capacitor C 21; Described reset chip U8 is connected with described single-chip microcomputer U1; The two ends of described resistance R 21 are connected on the GND terminal and RSET terminal of described reset chip U8, the two ends of described resistance R 24 are connected on the VCC terminal and MR terminal of described reset chip U8, the two ends of described capacitor C 21 are also connected on the VCC terminal and MR terminal of described reset chip U8, and the VCC connecting terminals of reset chip U8 connects the 3.3V power vd D terminal of single-chip microcomputer U1;
Described 3V power circuit comprises 3V battery BATT, diode D21 and diode D22; The minus earth of described 3V battery BATT, the positive pole of described 3V battery BATT connects the positive pole of described diode D22, the negative pole of described diode D22 connects the VBAT terminal of single-chip microcomputer U1, the negative pole of described diode D21 is also connected with the VBAT terminal of single-chip microcomputer U1, and the positive pole of described diode D21 connects the 3.3V power vd D terminal of single-chip microcomputer U1;
Described system clock circuit comprises capacitor C 31, capacitor C 32 and crystal oscillator Y2; Ground connection after one end of one end of described capacitor C 31 and described capacitor C 32 is connected, the RTCX_1 terminal of the other end single-chip microcomputer U1 of described capacitor C 31, the RTCX_0 terminal of the other end single-chip microcomputer U1 of described capacitor C 32, the two ends of described crystal oscillator Y2 are connected on the RTCX_1 terminal of single-chip microcomputer U1 and the RTCX_0 terminal of single-chip microcomputer U1;
Described outer clock circuit comprises capacitor C 33, capacitor C 34 and crystal oscillator Y1; Ground connection after one end of one end of described capacitor C 33 and described capacitor C 34 is connected, the XTAL_1 terminal of the other end single-chip microcomputer U1 of described capacitor C 33, the XTAL_0 terminal of the other end single-chip microcomputer U1 of described capacitor C 34, the two ends of described crystal oscillator Y1 are connected on the XTAL_1 terminal of single-chip microcomputer U1 and the XTAL_0 terminal of single-chip microcomputer U1;
Described indicator light circuit comprises resistance R 25 and light emitting diode D23; The minus earth of described light emitting diode D23, the positive pole of described light emitting diode D23 is connected with described single-chip microcomputer U1 by described resistance R 25.
3. the micro-water-mass density composite monitoring device of sulfur hexafluoride gas according to claim 1, is characterized in that, (as shown in Figure 3) described LED display interface circuit comprises chip U9, capacitor C 303～capacitor C 306 and 4 needle interface J10; Described chip U9 is connected with described single-chip microcomputer U1, and it is upper that the two ends of described capacitor C 303～capacitor C 306 are all connected to chip U9, and that described chip U9 is MAX3232ESA; Described 4 needle interface J10 are connected with described chip U9, and LCDs is connected with chip U9 by 4 needle interface J10.
4. the micro-water-mass density composite monitoring device of sulfur hexafluoride gas according to claim 1, is characterized in that, (as shown in Figure 4) described sensor input signal circuit comprises the first bleeder circuit, the second bleeder circuit and the 3rd bleeder circuit; Described the first bleeder circuit comprises swept resistance R304 and 3 needle interface J6; One end ground connection of described swept resistance R304, the other end of described swept resistance R304 is all connected with described 3 needle interface J6 with sliding end; Described 3 needle interface J6 are connected with described single-chip microcomputer U1;
Described the first bleeder circuit comprises swept resistance R305 and 3 needle interface J7; One end ground connection of described swept resistance R305, the other end of described swept resistance R305 is all connected with described 3 needle interface J7 with sliding end; Described 3 needle interface J7 are connected with described single-chip microcomputer U1;
Described the 3rd bleeder circuit resistance R 306 and 3 needle interface J8; One end ground connection of described resistance R 306, the other end of described resistance R 306 is connected with described 3 needle interface J8, and connects power supply VCC; Described 3 needle interface J8 are connected with described single-chip microcomputer U1.
5. the micro-water-mass density composite monitoring device of sulfur hexafluoride gas according to claim 1, it is characterized in that, (as shown in Fig. 5-1 and 5-2) described power circuit comprises for the first power circuit of provide+5V voltage with for the second source circuit of provide+3.3V voltage;
(as shown in Fig. 5-1) described first power circuit comprises power supply chip U3, resistance R 26, capacitor C 10～capacitor C 14, diode D3, light emitting diode D24 and inductance L 2; The VIN terminal connection+24V direct supply of described power supply chip U3, the GND terminal ground connection of described power supply chip U3, one end of described capacitor C 10～capacitor C 12 connects the VIN terminal of power supply chip U3, the other end ground connection of described capacitor C 10～capacitor C 12; The negative pole of described diode D3 connects the VOUT terminal of power supply chip U3, the plus earth of diode D3; One end of described inductance L 2 connects the VOUT terminal of power supply chip U3, and the other end of inductance L 2 connects the FEEDBACK terminal of power supply chip U3, and the FEEDBACK terminal of described power supply chip U3 is VDD5V output terminal; One end of described capacitor C 13～capacitor C 14 connects the FEEDBACK terminal of power supply chip U3, other end ground connection; One end of described resistance R 26 connects the FEEDBACK terminal of power supply chip U3, and the other end is by described light emitting diode D24 ground connection;
(as shown in Fig. 5-2) described second source circuit comprises power supply chip U4, resistance R 11～R13, resistance R 27, capacitor C 15～capacitor C 19, diode D4, light emitting diode D25; The IN terminal of described power supply chip U4 connects the VDD5V direct supply of the first power circuit output, the GND terminal ground connection of described power supply chip U4; The positive pole of described diode D4 and negative pole are connected on the OUT terminal and IN terminal of described power supply chip U4; One end ground connection of described resistance R 11, the other end of described resistance R 11 is connected with the positive pole of diode D4 by resistance R 12, resistance R 13 successively, and described resistance R 11 is connected with the ADJ terminal of power supply chip U4 with the tie point between resistance R 12; Described capacitor C 15 is connected in the two ends of described resistance R 13 in parallel; One end ground connection between described capacitor C 16～capacitor C 19 after connection parallel with one another, the other end is connected with the positive pole of diode D4; One end of described resistance R 27 is connected with the positive pole of diode D4, and the other end is by light emitting diode D25 ground connection.
6. the micro-water-mass density composite monitoring device of sulfur hexafluoride gas according to claim 1, it is characterized in that, (as shown in Figure 6) described communicating circuit comprises communication chip U2, bi-directional voltage stabilizing pipe ESD2, resistance R 601～R605, triode Q1, fuse F7 and fuse F8; The two ends of described resistance R 601 are connected in the base stage and emitter of described triode Q1, the grounded emitter of described triode Q1, and the collector of described triode Q is connected with communication chip U2; One end of described resistance R 602 is connected with the base stage of triode Q1, and the other end is connected with described single-chip microcomputer U1; One end of described resistance R 603 is connected with the collector of triode Q1, and the other end is connected with described 5V power vd D; One end of described resistance R 604 is connected with communication chip U2 and is connected with resistance R 605 one end, and the other end is connected with described single-chip microcomputer U1;
Described bi-directional voltage stabilizing pipe ESD2 is connected with communication chip U2, and described fuse F7 is all connected with described communication chip U2 with fuse F8.
7. the micro-water-mass density composite monitoring device of sulfur hexafluoride gas according to claim 1, is characterized in that, (as shown in Figure 7) described active microwave sensor circuit comprises triode Q5,3 needle interface J9, resistance R 701 and resistance R 702;
One end connection+12V power supply of described resistance R 701 and being connected with 3 needle interface J9, the collector of the other end connecting triode Q5 of described R701 is also connected with described single-chip microcomputer U1; One end of described resistance R 702 is connected with 3 needle interface J9, the base stage of the other end connecting triode Q5 of described R702; The grounded emitter of described triode Q5 is also connected with 3 needle interface J9.
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