CN103529371B - A kind of intrusive mood controller switching equipment local discharge on-line monitoring device - Google Patents

A kind of intrusive mood controller switching equipment local discharge on-line monitoring device Download PDF

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CN103529371B
CN103529371B CN201310530894.0A CN201310530894A CN103529371B CN 103529371 B CN103529371 B CN 103529371B CN 201310530894 A CN201310530894 A CN 201310530894A CN 103529371 B CN103529371 B CN 103529371B
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unit
signal
monitoring
mentioned
sensing unit
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CN201310530894.0A
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CN103529371A (en
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卢慧清
吴笃贵
江福官
周彦
朱旻捷
顾爱斌
王勤
蒋华勤
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国网上海市电力公司
厦门红相电力设备股份有限公司
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Abstract

The present invention discloses a kind of intrusive mood controller switching equipment local discharge on-line monitoring device, and it comprises sensing unit and monitoring host computer; Sensing unit is made up of transient earth voltage sensing unit and supersonic sensing unit; Monitoring host computer is made up of signal condition unit, signal processing unit, display unit, ultrasonic signal monitoring unit and power supply unit; Transient earth voltage sensing unit and supersonic sensing unit, be connected with multiple input ends of signal condition unit respectively, and multiple output terminals of signal condition unit are connected with signal processing unit, ultrasonic signal monitoring unit respectively; The output terminal of signal processing unit is connected with display unit; Power supply unit is connected with signal condition unit, signal processing unit, display unit, ultrasonic signal monitoring unit respectively, provides working power; Sensing unit obtains transducing signal, and monitoring host computer receives the detection signal of this sensing unit.

Description

A kind of intrusive mood controller switching equipment local discharge on-line monitoring device

Technical field

The present invention relates to controller switching equipment insulation, current-carrying On-line Fault monitoring field, a kind of intrusive mood controller switching equipment local discharge on-line monitoring device.

Background technology

Controller switching equipment insulation and current-carrying fault account for the 30%-50% that sum occurs fault, are the major failure of controller switching equipment.Insulation and the generation of current-carrying fault all with partial discharge phenomenon output, by detect controller switching equipment shelf depreciation condition adjudgement and analyze controller switching equipment insulation status be apply the most at present, the most extensively, most effective method.

Current controller switching equipment shelf depreciation work of patrolling and examining progressively is carried out, but comes with some shortcomings, and mainly comprises:

(1) existing testing product is many obtains data by controller switching equipment cabinet external detection.Because controller switching equipment working environment is complicated, the signal that shelf depreciation produces very easily is submerged in noise, and testing result reference value declines.

(2) along with controller switching equipment cabinet sealing is become better and better, cabinet obtains data grows difficulty (especially ultrasonic signal) outward, and cabinet external environment noise is large, detects data reliability and declines.

(3) work of patrolling and examining affects comparatively large by controller switching equipment installation site, as switch cubicle, on-the-spot a lot of switch cubicle is all adopt to install by wall, and the switch cubicle back side is less with interval between the walls, and patrol officer cannot arrive its back side and detect, and causes detection not comprehensive.

(4) by the impact of controller switching equipment structural design, part controller switching equipment design height is higher, causes very large task difficulty to controller switching equipment top Partial Discharge Detection.

Along with electrical network scale develops rapidly in recent years, controller switching equipment quantity sharply increases, and patrol and examine workload and increase severely, and patrol officer is substantially without growth, causes patrol officer's labour intensity obviously to increase.

Summary of the invention

The object of the present invention is to provide a kind of intrusive mood controller switching equipment local discharge on-line monitoring device, it can adopt acoustoelectric combined monitoring technology directly to obtain local discharge signal from controller switching equipment inside in the energized state, carry out on-line monitoring to the shelf depreciation state of controller switching equipment, this device can expand communication function establishment partial discharge monitoring system.

In order to achieve the above object, the present invention is achieved through the following technical solutions:

A kind of intrusive mood controller switching equipment local discharge on-line monitoring device, is characterized in, comprises sensing unit and monitoring host computer; Above-mentioned sensing unit is made up of transient earth voltage sensing unit and supersonic sensing unit; Above-mentioned monitoring host computer is made up of signal condition unit, signal processing unit, display unit, ultrasonic signal monitoring unit and power supply unit;

Above-mentioned transient earth voltage sensing unit and above-mentioned supersonic sensing unit, be connected with multiple input ends of above-mentioned signal condition unit respectively, multiple output terminals of above-mentioned signal condition unit are connected with above-mentioned signal processing unit, above-mentioned ultrasonic signal monitoring unit respectively; The output terminal of above-mentioned signal processing unit is connected with above-mentioned display unit; Above-mentioned power supply unit is connected with above-mentioned signal condition unit, signal processing unit, display unit, ultrasonic signal monitoring unit respectively, provides working power; Above-mentioned sensing unit obtains transducing signal, and above-mentioned monitoring host computer receives the detection signal of this sensing unit.

Above-mentioned intrusive mood controller switching equipment local discharge on-line monitoring device, is characterized in, above-mentioned transient earth voltage sensing unit comprises: excretion disposal, signal-transmitting cable and impedance-matching connectors; Above-mentioned excretion disposal is connected with above-mentioned impedance-matching connectors by above-mentioned signal-transmitting cable.

Above-mentioned intrusive mood controller switching equipment local discharge on-line monitoring device, is characterized in, above-mentioned supersonic sensing unit comprises: ultrasonic sensor, signal-transmitting cable and impedance-matching connectors; Above-mentioned ultrasonic sensor is connected with above-mentioned impedance-matching connectors by above-mentioned signal-transmitting cable.

Above-mentioned intrusive mood controller switching equipment local discharge on-line monitoring device, is characterized in, above-mentioned signal condition unit comprises: transient earth voltage signal condition unit and ultrasonic signal conditioning unit; The input end of above-mentioned transient earth voltage signal condition unit, the input end of above-mentioned ultrasonic signal conditioning unit are connected with the output terminal of above-mentioned transient earth voltage sensing unit, the output terminal of above-mentioned supersonic sensing unit respectively, the output terminal of above-mentioned transient earth voltage signal condition unit, an output terminal of above-mentioned ultrasonic signal conditioning unit are connected with multiple input ends of above-mentioned signal processing unit, and another output terminal of above-mentioned ultrasonic signal conditioning unit is connected with above-mentioned ultrasonic signal monitoring unit.

Above-mentioned intrusive mood controller switching equipment local discharge on-line monitoring device; be characterized in, above-mentioned transient earth voltage signal condition unit comprises: prime protection buffer circuit, bandpass filter, logarithmic amplifier, detection shaping circuit, sef-adapting filter and conditioned signal output circuit are sequentially connected in series composition.

Above-mentioned intrusive mood controller switching equipment local discharge on-line monitoring device, be characterized in, above-mentioned ultrasonic signal conditioning unit comprises: coupling coupled circuit, linear amplifier circuit, bandpass filter, logarithmic amplifier, detection shaping circuit, match circuit and conditioned signal output circuit are sequentially connected in series composition.

Above-mentioned intrusive mood controller switching equipment local discharge on-line monitoring device, be characterized in, above-mentioned ultrasonic signal monitoring unit comprises: coupling coupled circuit, linear amplifier and the first bandpass filter are sequentially connected in series, oscillator, attenuator and the second bandpass filter are sequentially connected in series, the output terminal of the first above-mentioned bandpass filter, the output terminal of the second above-mentioned bandpass filter are connected with the input end of Analogue mixer respectively, and above-mentioned Analogue mixer, the 3rd bandpass filter, audio drive circuitry, audio output circuit are sequentially connected in series.

The present invention compared with prior art has the following advantages: all embedded controller switching equipment inside that are installed on of all component such as the sensing unit of this device and monitoring main frame, transient earth voltage sensing unit and supersonic sensing unit are for obtaining transient earth voltage signal and the ultrasonic signal of shelf depreciation generation, two paths of signals transfers to monitoring main frame through high-frequency signal transmission wire, and monitoring result also numerically intuitively shows by monitoring main frame settling signal process.By ultrasonic signal monitoring unit, realize ultrasonic signal by equipment of raising one's voice such as earphones and monitor.Observation process completes automatically, in real time, continuously, without the need to manual intervention, effectively realizes fast inspection, reduces patrol officer and drops into, reduce and patrol and examine labour intensity.

Accompanying drawing explanation

Fig. 1 is the functional structure schematic diagram of a kind of intrusive mood controller switching equipment of the present invention local discharge on-line monitoring device.

Fig. 2 is the transient earth voltage sensing unit schematic diagram of the function of a kind of intrusive mood controller switching equipment of the present invention local discharge on-line monitoring device.

Fig. 3 is the excretion disposal structural representation of a kind of intrusive mood controller switching equipment of the present invention local discharge on-line monitoring device.

Fig. 4 is the supersonic sensing Elementary Function schematic diagram of a kind of intrusive mood controller switching equipment of the present invention local discharge on-line monitoring device.

Fig. 5 is the ultrasonic sensor structural representation of a kind of intrusive mood controller switching equipment of the present invention local discharge on-line monitoring device.

Fig. 6 is the transient earth voltage conditioning unit schematic diagram of the function of a kind of intrusive mood controller switching equipment of the present invention local discharge on-line monitoring device.

Fig. 7 is the ultrasonic signal conditioning unit schematic diagram of the function of a kind of intrusive mood controller switching equipment of the present invention local discharge on-line monitoring device.

Fig. 8 is the ultrasound wave monitoring unit schematic diagram of the function of a kind of intrusive mood controller switching equipment of the present invention local discharge on-line monitoring device.

Fig. 9 is the display unit schematic diagram of the function of a kind of intrusive mood controller switching equipment of the present invention local discharge on-line monitoring device.

Figure 10 is the power supply unit schematic diagram of the function of a kind of intrusive mood controller switching equipment of the present invention local discharge on-line monitoring device.

Embodiment

Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the present invention is further elaborated.

As shown in Figure 1, a kind of intrusive mood controller switching equipment local discharge on-line monitoring device, is characterized in, comprises sensing unit 1 and monitoring host computer 2; Above-mentioned sensing unit 1 is made up of transient earth voltage sensing unit 11 and supersonic sensing unit 12; Above-mentioned monitoring host computer 2 is made up of signal condition unit 21, signal processing unit 22, display unit 23, ultrasonic signal monitoring unit 24 and power supply unit 25.

Above-mentioned transient earth voltage sensing unit 11 and above-mentioned supersonic sensing unit 12, be connected with multiple input ends of above-mentioned signal condition unit 21 respectively, multiple output terminals of above-mentioned signal condition unit 21 are connected with above-mentioned signal processing unit 22, above-mentioned ultrasonic signal monitoring unit 24 respectively; The output terminal of above-mentioned signal processing unit 22 is connected with above-mentioned display unit 23; Above-mentioned power supply unit 25 is connected with above-mentioned signal condition unit 21, signal processing unit 22, display unit 23, ultrasonic signal monitoring unit 24 respectively, provides working power; Above-mentioned sensing unit 1 obtains transducing signal, and above-mentioned monitoring host computer 2 receives the detection signal of this sensing unit 1.

CPU included by above-mentioned signal processing unit 22, design parameter requires to include: the microprocessor of more than 16 and 16, has the FLASH program storage space of more than 32K byte, has abundant I/O interface; Such as PIC series, STM series microprocessor.This A/D module included by signal processing unit 22 can be CPU integration module, also can select independent A/D module, require that the figure place of A/D module is more than 10 and 10, and sampling rate be greater than 500KHz.

As shown in Figure 2, a kind of intrusive mood controller switching equipment local discharge on-line monitoring device transient earth voltage sensing unit 11 comprises: excretion disposal 111, signal-transmitting cable 112 and impedance-matching connectors 113; Above-mentioned excretion disposal 111 obtains transient earth voltage transducing signal, and is connected with above-mentioned impedance-matching connectors 113 by above-mentioned signal-transmitting cable 112.This impedance-matching connectors 113 receives the detection signal of this excretion disposal 111 by this signal-transmitting cable 112.

In the present embodiment, model is selected to be that the coaxial cable for high frequency of RG174 is as above-mentioned signal-transmitting cable 112; Model is selected to be that the 50 Ω impedance-matching connectors of SMA or SMB or BNC are as above-mentioned impedance-matching connectors 123.

As shown in Figure 3, a kind of transient earth voltage sensing unit of intrusive mood controller switching equipment local discharge on-line monitoring device, when high-tension switch cabinet generation shelf depreciation, the discharge electricity amount of electrified body 31 is first gathered in the ground metal portion close with point of discharge, form current impulse, propagate to all directions, the electromagnetic wave produced because of electric discharge is blazed abroad by the seam crossing of metal cabinet or the liner of gas-insulated switch, produce a transient state voltage-to-ground (i.e. " transient earth voltage ") simultaneously, transient state voltage-to-ground generally can only maintain a few nanosecond (ns) between tens millivolts ~ a few volt.By being arranged on the capacitive coupling formula sensor 111 in the grounded metal enclosure 32 of equipment under test, can discharge pulse signal be detected, obtaining the parameter such as amplitude and frequency of this pulse signal.Capacitive coupling formula sensor 111 is similar to RF coupling condenser; sensor insulation course 1111 has insulation and the double effects protected; in the grounded metal enclosure 32 of equipment under test, the change of transient state voltage-to-ground can induce high-frequency current on the metal polar plate of sensor main body 1112; draw interface 1113 by sensor to be connected with its treatment facility; the high-frequency current that sensor main body 1112 exports is processed, namely indirectly can obtain intensity and the frequency of shelf depreciation.

As shown in Figure 4, a kind of supersonic sensing unit 12 of intrusive mood controller switching equipment local discharge on-line monitoring device comprises: ultrasonic sensor 121, signal-transmitting cable 122 and impedance-matching connectors 123; Above-mentioned ultrasonic sensor 121 obtains ultrasonic signal, and is connected with above-mentioned impedance-matching connectors 123 by above-mentioned signal-transmitting cable 122.This impedance-matching connectors 123 receives the detection signal of this ultrasonic sensor 121 by above-mentioned signal-transmitting cable 122.

As shown in Figure 5, above-mentioned supersonic sensing unit 12 is passive sensing unit, above-mentioned ultrasonic sensor 121, utilize the principle of piezoelectric effect, adopt a kind of piezoceramic material of twin crystal oscillator structure, the specific direction of piezoelectric ceramics applies pressure, and piezoelectric ceramics just strains, and produces simultaneously for positive pole another side is the voltage of negative pole.Piezoelectric ceramics is by special technique and cutting, have the resonance frequency of fixing and a bandwidth, different piezoelectric ceramics can be the most responsive to different characteristic frequency, and have certain bandwidth, so the sensor of different crest frequency and bandwidth can be produced, to adapt to different testing requirements.

In the present embodiment, the ultrasonic signal produced due to controller switching equipment electric discharge concentrates on 20KHz-50KHz, selects centre frequency to be the ultrasonic sensor of 40KHz, namely selects NU40C10R-1 type ultrasonic sensor; Model is selected to be that the coaxial cable for high frequency of RG174 is as above-mentioned signal-transmitting cable 122; Model is selected to be that the impedance-matching connectors of 50 Ω of SMA or SMB is as above-mentioned impedance-matching connectors 123.

As shown in Figure 1, a kind of signal condition unit 21 of intrusive mood controller switching equipment local discharge on-line monitoring device comprises: transient earth voltage signal condition unit 211 and ultrasonic signal conditioning unit 212, the input end of above-mentioned transient earth voltage signal condition unit 211, the input end of above-mentioned ultrasonic signal conditioning unit 212 respectively with the output terminal of above-mentioned transient earth voltage sensing unit 11, the output terminal of above-mentioned supersonic sensing unit 12 is connected, the output terminal of above-mentioned transient earth voltage signal condition unit 211, an output terminal of above-mentioned ultrasonic signal conditioning unit 212 is connected with multiple input ends of above-mentioned signal processing unit 22, another output terminal of above-mentioned ultrasonic signal conditioning unit 212 is connected with above-mentioned ultrasonic signal monitoring unit 24.

As shown in Figure 6, a kind of transient earth voltage signal condition unit 211 of intrusive mood controller switching equipment local discharge on-line monitoring device comprises: prime protection buffer circuit 2111, bandpass filter 2112, logarithmic amplifier 2113, detection shaping circuit 2114, sef-adapting filter 2115 and conditioned signal output circuit 2116 are sequentially connected in series composition.Above-mentioned prime protection buffer circuit 2111 obtains the detection signal of above-mentioned transient earth voltage sensing unit 11; this detection signal carries out filtering by bandpass filter 2112; filtered signal amplifies through above-mentioned logarithmic amplifier 2113; be transferred to detection shaping circuit 2114; above-mentioned sef-adapting filter 2115 carries out filtering after obtaining the output end signal of this detection shaping circuit 2114, and filtered Signal transmissions is to conditioned signal output circuit 2116.

In the present embodiment, the design parameter of logarithmic amplifier 2113 requires to include: input dynamic range is greater than 70dB, and instantaneous recovery time is less than 4nS, and band is wider than 200MHz.Sef-adapting filter 2115 take operational amplifier as the modular circuit that core is built, and this operational amplifier need meet design parameter and require to include: band is wider than 200MHz, low noise, and input impedance is greater than 10M Ω.

As shown in Figure 7, a kind of ultrasonic signal conditioning unit 212 of intrusive mood controller switching equipment local discharge on-line monitoring device comprises: coupling coupled circuit 2121, linear amplifier circuit 2122, bandpass filter 2123, logarithmic amplifier 2124, detection shaping circuit 2125, match circuit 2126 and conditioned signal output circuit 2127 are sequentially connected in series composition.The coupling coupled circuit 2121 obtaining above-mentioned supersonic sensing unit 12 processing signals is connected with above-mentioned linear amplifier circuit 2122, the bandpass filter 2123 passed through through amplifying signal carries out filtering, filtered Signal transmissions is to above-mentioned logarithmic amplifier 2124, Signal transmissions after amplification is to above-mentioned detection shaping circuit 2125, the output end signal that above-mentioned match circuit 2126 obtains this detection shaping circuit 2125 processes, and treated Signal transmissions is to conditioned signal output circuit 2127.

In the present embodiment, the design parameter of above-mentioned logarithmic amplifier 2124 requires to include: input dynamic range is greater than 80dB, and instantaneous recovery time is less than 4nS.The design parameter of above-mentioned linear amplifier circuit 2122 requires to include voltage bias and is less than 40uV, and temperature drift is less than 0.5 μ v/C, and common-mode rejection ratio is greater than 120dB.

As shown in Figure 8, a kind of ultrasonic signal monitoring unit 24 of intrusive mood controller switching equipment local discharge on-line monitoring device comprises: coupling coupled circuit 2411, linear amplifier 2412 and the first bandpass filter 2413 are sequentially connected in series, oscillator 2414, attenuator 2415 and the second bandpass filter 2416 are sequentially connected in series, the output terminal of the first above-mentioned bandpass filter 2413, the output terminal of the second above-mentioned bandpass filter 2416 is connected with the input end of Analogue mixer 2417 respectively, above-mentioned Analogue mixer 2417, 3rd bandpass filter 2418, audio drive circuitry 2419, audio output circuit 2420 is sequentially connected in series.Above-mentioned coupling coupled circuit 2411 obtains the detection signal of above-mentioned ultrasonic signal conditioning unit 212, this detection signal carries out Linear Amplifer through above-mentioned linear amplifier 2412, Signal transmissions after amplification carries out filtering, through filtered Signal transmissions to above-mentioned Analogue mixer 2417 to the first bandpass filter 2413; The output terminal of above-mentioned oscillator 2414 is connected with the input end of above-mentioned attenuator 2415, and the second bandpass filter 2416 obtains the output end signal of this attenuator 2415 and carries out filtering, and filtered Signal transmissions is to above-mentioned Analogue mixer 2417; The output end signal of the 3rd bandpass filter 2418 pairs of Analogue mixers 2417 carries out filtering, and filtered Signal transmissions, to above-mentioned, through the output end signal of this audio drive circuitry 2419 process, is transferred to above-mentioned audio output circuit 2420.

Above-mentioned ultrasonic signal monitoring unit 24 utilizes Super heterodyne principle, by ultrasonic signal and intrinsic signals mixing, high-frequency signal is reduced to the low frequency signal that people's ear can be heard, can identify.Such as, the ultrasonic signal of 40KHz is reduced to 1KHz, namely requires that above-mentioned oscillator 2414 produces the signal of 39KHz.

In the present embodiment, the design parameter of above-mentioned linear amplifier 2412 requires to include: voltage bias is less than 40uVdB, and temperature drift is less than 0.5 μ v/C, and common-mode rejection ratio is greater than 120dB.Above-mentioned Analogue mixer 2417 will meet the requirement that input dynamic range is large, twin voltage is powered.

As shown in Figure 9, a kind of display unit 23 of intrusive mood controller switching equipment local discharge on-line monitoring device comprises: scrambler 231 and numeral method unit 232; Above-mentioned scrambler 231 obtains the output signal of above-mentioned signal processing unit 22, and this scrambler 231 is connected with above-mentioned numeral method unit 232.

In the present embodiment, CPU encodes according to the coding rule of this scrambler 231, lights the charactron of this numeral method unit 232.This display unit 23 numerically intuitively shows for signal processing unit 22 is processed the local discharge characteristic data obtained, and these local discharge characteristic data comprise hyperacoustic maximum amplitude, the amplitude of transient earth voltage, the pulse number etc. of transient earth voltage in 1s.

As shown in Figure 10, a kind of power supply unit of intrusive mood controller switching equipment local discharge on-line monitoring device comprises: switch power module 251 and low-pass filter 252; Above-mentioned switch power module 251 obtains the 220VAC/110VDC of power supply end input, and the output end signal after the process of this switch power module 251 is transferred to above-mentioned low-pass filter 252 and processes, output power supply ± 5V.

Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.

Claims (5)

1. an intrusive mood controller switching equipment local discharge on-line monitoring device, is characterized in that, comprises sensing unit (1) and monitoring host computer (2); Described sensing unit (1) is made up of transient earth voltage sensing unit (11) and supersonic sensing unit (12); Described monitoring host computer (2) is made up of signal condition unit (21), signal processing unit (22), display unit (23), ultrasonic signal monitoring unit (24) and power supply unit (25);
Described transient earth voltage sensing unit (11) and described supersonic sensing unit (12), be connected with multiple input ends of described signal condition unit (21) respectively, multiple output terminals of described signal condition unit (21) are connected with described signal processing unit (22), described ultrasonic signal monitoring unit (24) respectively; The output terminal of described signal processing unit (22) is connected with described display unit (23); Described power supply unit (25) is connected with described signal condition unit (21), signal processing unit (22), display unit (23), ultrasonic signal monitoring unit (24) respectively, provides working power; Described sensing unit (1) obtains transducing signal, and described monitoring host computer (2) receives the detection signal of this sensing unit (1);
Described signal condition unit (21) comprising: transient earth voltage signal condition unit (211) and ultrasonic signal conditioning unit (212), the input end of described transient earth voltage signal condition unit (211), the input end of described ultrasonic signal conditioning unit (212) respectively with the output terminal of described transient earth voltage sensing unit (11), the output terminal of described supersonic sensing unit (12) is connected, the output terminal of described transient earth voltage signal condition unit (211), an output terminal of described ultrasonic signal conditioning unit (212) is connected with multiple input ends of described signal processing unit (22), another output terminal of described ultrasonic signal conditioning unit (212) is connected with described ultrasonic signal monitoring unit (24),
Described transient earth voltage signal condition unit (211) comprising: prime protection buffer circuit (2111), bandpass filter (2112), logarithmic amplifier (2113), detection shaping circuit (2114), sef-adapting filter (2115) and conditioned signal output circuit (2116) are sequentially connected in series composition.
2. intrusive mood controller switching equipment local discharge on-line monitoring device as claimed in claim 1, it is characterized in that, described transient earth voltage sensing unit (11) comprising: excretion disposal (111), signal-transmitting cable (112) and impedance-matching connectors (113); Described excretion disposal (111) is connected with described impedance-matching connectors (113) by described signal-transmitting cable (112).
3. intrusive mood controller switching equipment local discharge on-line monitoring device as claimed in claim 1, it is characterized in that, described supersonic sensing unit (12) comprising: ultrasonic sensor (121), signal-transmitting cable (122) and impedance-matching connectors (123); Described ultrasonic sensor (121) is connected with described impedance-matching connectors (123) by described signal-transmitting cable (122).
4. intrusive mood controller switching equipment local discharge on-line monitoring device as claimed in claim 1, it is characterized in that, described ultrasonic signal conditioning unit (212) comprising: coupling coupled circuit (2121), linear amplifier circuit (2122), bandpass filter (2123), logarithmic amplifier (2124), detection shaping circuit (2125), match circuit (2126) and conditioned signal output circuit (2127) are sequentially connected in series composition.
5. intrusive mood controller switching equipment local discharge on-line monitoring device as claimed in claim 1, it is characterized in that, described ultrasonic signal monitoring unit (24) comprising: coupling coupled circuit (2411), linear amplifier (2412) and the first bandpass filter (2413) are sequentially connected in series, oscillator (2414), attenuator (2415) and the second bandpass filter (2416) are sequentially connected in series, the output terminal of described the first bandpass filter (2413), the output terminal of described the second bandpass filter (2416) is connected with the input end of Analogue mixer (2417) respectively, described Analogue mixer (2417), 3rd bandpass filter (2418), audio drive circuitry (2419), audio output circuit (2420) is sequentially connected in series.
CN201310530894.0A 2013-11-01 2013-11-01 A kind of intrusive mood controller switching equipment local discharge on-line monitoring device CN103529371B (en)

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