CN204269766U - A kind of multi-way switch cabinet acoustoelectric signal harvester - Google Patents
A kind of multi-way switch cabinet acoustoelectric signal harvester Download PDFInfo
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- CN204269766U CN204269766U CN201420750518.2U CN201420750518U CN204269766U CN 204269766 U CN204269766 U CN 204269766U CN 201420750518 U CN201420750518 U CN 201420750518U CN 204269766 U CN204269766 U CN 204269766U
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Abstract
A kind of multi-way switch cabinet acoustoelectric signal harvester, comprises paired sensor assembly, pair signals conditioning module, master control collection analysis circuit module, power supply unit, backstage, first substrate and second substrate; Pair signals conditioning module is fixing on the first substrate, and master control collection analysis circuit module, power supply unit are fixed on second substrate; The local discharge signal of sensor assembly switch cubicle delivers to pair signals conditioning module, pair signals conditioning module carries out A/D conversion after the signal received is carried out filtering, amplification, peak detection process, it is fast that signal after conversion delivers to master control collection analysis circuit mould, by master control collection analysis circuit mould F.F. row data calculation process, extract local discharge characteristic data, and Monitoring Data is uploaded to backstage, meanwhile, realize LCD screen by the mode of expansion soon in conjunction with master control collection analysis circuit mould to show on the spot; Solution switchgear discharge examination is inconvenient, workload is large, Monitoring Data cannot realize long-range problem of checking.
Description
Technical field
The utility model relates to signal detection apparatus, particularly relates to the signal supervisory instrument of switchgear.
Background technology
According to two groups of ASSOCIATE STATISTICS, one group of statistical result showed, with 2004 during 1989 ~ 1997 years, in the fault type of 40.5 below kV electric pressure switchgears, insulation failure and current-carrying fault (containing obstacle) account for 30% ~ 53%; And another group statistical result showed, during 1992 ~ 2002 years, in switchgear fault type, the ratio of insulation failure and current-carrying fault is up to 66%.Insulation failure in above-mentioned two groups of ASSOCIATE STATISTICS results and current-carrying fault, all closely related with electric discharge phenomena.
At present in all faults of switchgear, there is the fault up to 44% can be detected by Partial Discharge Detecting Technology, wherein, the destructive malfunction of 85% is all relevant with partial discharge phenomenon, therefore, discharge examination implemented to medium voltage switchgear equipment or monitor the probability of malfunction that significantly can reduce controller switching equipment.
Means at present in order to implement discharge examination or monitoring to medium voltage switchgear equipment mainly contain handheld instrument and portable instrument patrols and examines test, but these modes have engendered that cabinet external noise is large in actual applications, ultrasound wave cannot Sensitive Detection good airproof performance switch cubicle and by switch cubicle position limitation (as the back side cannot be detected), the person works's amount problem such as increase greatly;
In addition, TEV sensor and ultrasonic sensor are embedded in switch cabinet bus cabin, isolating switch cabin, cable tank indoor although existing at present, but the result of its monitoring and the data display device also just on cabinet shows, scene is still needed to check, owing to carrying out data upload, therefore inconvenient operations staff is directly at Central Control Room or long-rangely check data.
Utility model content
The purpose of this utility model is to provide a kind of multi-way switch cabinet acoustoelectric signal harvester, solves the problem that current switching devices discharge signal cannot effectively gather, collecting work amount large, Monitoring Data cannot realize teletransmission.
For solving the problem, a kind of multi-way switch cabinet acoustoelectric signal harvester that the utility model provides, comprises into sensor assembly, master control collection analysis circuit module, power supply unit, backstage; Sensor assembly is made up of TEV sensor and ultrasonic sensor; Sensor assembly is embedded in switch cubicle; Power supply unit is used for providing power supply; Backstage is used for that Monitoring Data is carried out electric discharge amplitude, historical data curve is shown; Also comprise pair signals conditioning module; Pair signals conditioning module is made up of TEV signal conditioning circuit module, ultrasonic signal conditioning circuit module, two AD conversion module; The signal output part of TEV sensor is electrically connected with TEV signal conditioning circuit module by signal input end, and TEV signal conditioning circuit module by signal output terminal is electrically connected with an AD conversion module signal input part; The signal output part of ultrasonic sensor is electrically connected with the signal input part of ultrasonic signal conditioning circuit module, and ultrasonic signal conditioning circuit module signal output part is electrically connected with another AD conversion module signal input part; Two AD conversion module are all electrically connected with the signal input part of master control collection analysis circuit module; The communication interface of master control collection analysis circuit module is connected with backstage.
TEV signal conditioning circuit module comprises TEV signaling multilevel filtering circuit, TEV signal logarithmic amplifying circuit, TEV signal peak detecting circuit; Wherein, the signal input part of TEV signaling multilevel filtering circuit is electrically connected with TEV sensor signal output terminal; The signal output part of TEV signaling multilevel filtering circuit is electrically connected with the signal input part of TEV signal logarithmic amplifying circuit; The signal output part of TEV signal logarithmic amplifying circuit is electrically connected with the input end of TEV signal peak detecting circuit.
Ultrasonic signal conditioning circuit module comprises ultrasonic signal pre-amplification circuit, ultrasonic signal bandwidth-limited circuit, ultrasonic signal logarithmic amplification electricity, ultrasonic signal peak-detector circuit; Wherein, the signal input part of ultrasonic signal pre-amplification circuit is electrically connected with the signal output part of ultrasonic sensor; The signal output part of ultrasonic signal pre-amplification circuit is electrically connected with the signal input part of ultrasonic signal bandwidth-limited circuit; The signal output part of ultrasonic signal bandwidth-limited circuit is electrically connected with the signal input part of ultrasonic signal logarithmic amplification electricity; The signal output part of ultrasonic signal logarithmic amplification electricity is electrically connected with the signal input part of ultrasonic signal peak-detector circuit.
TEV signal conditioning circuit module is covered by radome; The signal input part of TEV signal conditioning circuit module connects the signal output part of TEV sensor through bnc interface;
Ultrasonic signal conditioning circuit module is covered by radome; The signal input part of ultrasonic signal conditioning circuit module connects the signal output part of ultrasonic sensor through another bnc interface;
The signal output part of two AD conversion module is all electrically connected with FPC seat, and FPC seat is electrically connected through the signal input part of winding displacement with master control collection analysis circuit module.
Pair signals conditioning module is fixing on the first substrate through the first contact pin connector;
Master control collection analysis circuit module, power supply unit are all fixed on second substrate;
Master control acquisition process circuit module is connected with LCD display through expansion interface, shows on the spot for LCD screen; Monitoring Data is uploaded to backstage through 485 interfaces with Modbus agreement by master control acquisition process circuit module.
Power supply unit is protected by radome; The output terminal of power supply unit draws the second contact pin connector, and the second contact pin connector is connected through the power input lead of solder joint with master control collection analysis circuit module; The power input of power supply unit is drawn another and is organized the second contact pin connector, and this group second contact pin connector is connected with power interface through another assembly welding point.
TEV signaling multilevel filtering circuit comprises: resistance R
1, resistance R
2, resistance R
3, resistance R
4, resistance R
5, resistance R
6, resistance R
7, resistance R
8, resistance R
9, resistance R
10, electric capacity C
1, electric capacity C
2, electric capacity C
3, electric capacity C
4, electric capacity C
5, electric capacity C
6, electric capacity C
7, electric capacity C
8, electric capacity C
9, electric capacity C
10, electric capacity C
11, inductance L
1, inductance L
2, diode D
1with diode D
2; Wherein, the input end of TEV signaling multilevel filtering circuit is to series connection access electric capacity C successively between output terminal
5, resistance R
8, inductance L
1and inductance L
2; At TEV signaling multilevel filtering circuit input end and electric capacity C
5between select a node, this node respectively with diode D
1positive pole, diode D
2negative pole connect; Diode D
1negative pole and+5VU voltage between access resistance R
1; Diode D
1with resistance R
1between select a node, between this node and earth terminal, access resistance R
3, resistance R
2with electric capacity C
2connect rear and resistance R
3in parallel; Resistance R
1and select a node between+5VU voltage, access electric capacity C between this node and earth terminal
1; Diode D
2positive pole and-5VU voltage between access resistance R
4; Diode D
2with resistance R
4between select a node, between this node and earth terminal, access resistance R
6, resistance R
5with electric capacity C
4connect rear and resistance R
6in parallel; Resistance R
4and select a node between-5VU voltage, access electric capacity C between this node and earth terminal
3; At electric capacity C
5with resistance R
8between select a node, access resistance R between this node and earth terminal
7; At resistance R
8and inductance L
1between select a node, access resistance R in parallel between this node and earth terminal
9, electric capacity C
6, electric capacity C
7; In inductance L
1and inductance L
2between select a node, access electric capacity C in parallel between this node and earth terminal
8, electric capacity C
9; In inductance L
2and select a node between the output terminal of TEV signaling multilevel filtering circuit, access electric capacity C in parallel between this node and earth terminal
10, electric capacity C
11, resistance R
10;
TEV signal logarithmic amplifying circuit comprises: resistance R
11, resistance R
12, resistance R
13, electric capacity C
12, electric capacity C
13, electric capacity C
14, electric capacity C
15, electric capacity C
16with logarithmic amplifier AD8310; Wherein, electric capacity C is accessed between the INHI pin of TEV signal logarithmic amplifying circuit input end and logarithmic amplifier AD8310
12, electric capacity C
12and select a node between INHI pin, between this node and earth terminal, access resistance R
11; Electric capacity C is accessed between the INLO pin of logarithmic amplifier AD8310 and earth terminal
15; Resistance R is accessed between the INHI pin of logarithmic amplifier AD8310 and INLO pin
13; The COMM pin ground connection of logarithmic amplifier AD8310; Electric capacity C is accessed between the BFIN pin of logarithmic amplifier AD8310 and earth terminal
14; Between+5VT voltage and earth terminal, series connection accesses resistance R successively
12, electric capacity C
13; Resistance R
12with electric capacity C
13between select a node to connect ENBL pin, the Vpos pin of logarithmic amplifier AD8310 simultaneously; Electric capacity C is accessed between the OFLT pin of logarithmic amplifier AD8310 and earth terminal
16; The Vout pin of logarithmic amplifier AD8310 draws the signal output part of wire as TEV signal logarithmic amplifying circuit;
TEV signal peak detecting circuit comprises resistance R
14, resistance R
15, resistance R
16, resistance R
17, electric capacity C
17, electric capacity C
18, electric capacity C
19, diode D
3, diode D
4, operational amplifier A D8066 and operational amplifier A D8056; Wherein, the pin 3 of operational amplifier A D8066 is as signal input part; Resistance R is accessed between the pin 8 of operational amplifier A D8066 and+5VT voltage
14; At pin 8 and the resistance R of operational amplifier A D8066
14between select a node, access electric capacity C between this node and earth terminal
17; Resistance R is accessed between the pin 4 of operational amplifier A D8066 and-5VT voltage
16; Electric capacity C is accessed between the pin 4 of operational amplifier A D8066 and earth terminal
18; The pin two connecting resistance R respectively of operational amplifier A D8066
15one end, diode D
3negative pole, resistance R
15another termination-5VT voltage, diode D
3positive pole connect the pin one of operational amplifier A D8066; The pin one of operational amplifier A D8066 meets diode D
4positive pole, diode D
4negative pole connect the pin 5 of operational amplifier A D8056; At diode D
4negative pole and the pin 5 of operational amplifier A D8056 between select a node, access electric capacity C between this node and earth terminal
19, between this node and-5VT, access resistance R
17; Pin 4 and the pin 8 of operational amplifier A D8056 are all in high-impedance state; The pin 6 adapter pin 7 of operational amplifier A D8056; The pin 7 of operational amplifier A D8056 draws wire, as the signal output part of TEV signal peak detecting circuit.
Ultrasonic signal pre-amplification circuit comprises resistance R
18, resistance R
19, resistance R
20, resistance R
21, resistance R
22, resistance R
23, resistance R
24, resistance R
25, resistance R
26, resistance R
27, resistance R
28, resistance R
29, resistance R
30, resistance R
31, resistance R
32, resistance R
33, electric capacity C
20, electric capacity C
21, electric capacity C
22, electric capacity C
23, electric capacity C
24, electric capacity C
25, electric capacity C
26, electric capacity C
27, electric capacity C
28, electric capacity C
29, electric capacity C
30, electric capacity C
31, the two amplifier AD8058 of first instrument amplifier INA128, second instrument amplifier INA128 and Voltage Feedback; Wherein, electric capacity C is accessed between the signal input part of ultrasonic signal pre-amplification circuit and the pin 3 of first instrument amplifier INA128
21; The pin two of first instrument amplifier INA128 accesses electric capacity C with connecting successively between earth point
20, R
18; Between the pin two of first instrument amplifier INA128 and pin 3, series connection accesses resistance R successively
19, resistance R
20; At resistance R
19with resistance R
20between select a node ground connection; Resistance R is accessed between the pin one of first instrument amplifier INA128 and pin 8
21; Between+5VU voltage and earth terminal, series connection accesses resistance R successively
22, electric capacity C
22; At resistance R
22with electric capacity C
22between select a node to be connected with the pin 7 of first instrument amplifier INA128; Between-5VU voltage and earth terminal, series connection accesses resistance R successively
23, electric capacity C
23; Resistance R
23with electric capacity C
23between select a node to be connected with the pin 4 of first instrument amplifier INA128; Electric capacity C is accessed between the pin 6 of first instrument amplifier INA128 and the pin 3 of second instrument amplifier INA128
24; At pin 3 and the electric capacity C of second instrument amplifier INA128
24between select a node, access resistance R between this node and earth terminal
24; The pin two of second instrument amplifier INA128 is connected rear ground connection with the pin 7 of first instrument amplifier INA128, the pin 5 of first instrument amplifier INA128, the pin 5 of second instrument amplifier INA128 successively; Resistance R is accessed between the pin one of second instrument amplifier INA128 and pin 8
26; Between+5VU voltage and earth terminal, series connection accesses resistance R successively
25, electric capacity C
25; At resistance R
25with electric capacity C
25between select a node to be connected with the pin 7 of second instrument amplifier INA128; Between-5VU voltage and earth terminal, series connection accesses resistance R successively
27, electric capacity C
26; Resistance R
27with electric capacity C
26between select a node to be connected with the pin 4 of second instrument amplifier INA128; Between the pin two of the pin 6 of second instrument amplifier INA128 and the two amplifier AD8058 of Voltage Feedback, series connection accesses electric capacity C successively
27, resistance R
28, electric capacity C
30; At resistance R
28with electric capacity C
30between select a node, access resistance R between this node and earth terminal
29, connect successively between this node and the pin two of the two amplifier AD8058 of Voltage Feedback simultaneously and access electric capacity C
29, resistance R
31; Electric capacity C
29with resistance R
31between select a node, the pin one of the two amplifier AD8058 of this node and Voltage Feedback is connected; Resistance R is accessed between the pin 3 of the two amplifier AD8058 of Voltage Feedback and earth terminal
30; Between+5VU voltage and earth terminal, series connection accesses resistance R successively
32, electric capacity C
31; At resistance R
32with electric capacity C
31between select the pin 8 of the two amplifier AD8058 of a node and Voltage Feedback to be connected; Between-5VU voltage and earth terminal, series connection accesses resistance R successively
33, electric capacity C
28; At resistance R
33with electric capacity C
28between select the pin 4 of the two amplifier AD8058 of a node and Voltage Feedback to be connected; The pin one of the two amplifier AD8058 of Voltage Feedback draws the signal output part of a wire as ultrasonic signal pre-amplification circuit;
Ultrasonic signal bandwidth-limited circuit comprises resistance R
34, resistance R
35, electric capacity C
32, inductance L
3; Wherein, the signal input part of ultrasonic signal bandwidth-limited circuit is connected successively with output terminal and is accessed electric capacity C
32, inductance L
3; At electric capacity C
32and inductance L
3between select a node, access resistance R between this node and earth terminal
34; In inductance L
3and between output terminal, select a node, access resistance R between this node and earth terminal
35;
Ultrasonic signal logarithmic amplifying circuit comprises resistance R
36, resistance R
37, resistance R
38, resistance R
39, resistance R
40, electric capacity C
33, electric capacity C
34, electric capacity C
35, electric capacity C
36, electric capacity C
37, electric capacity C
38, electric capacity C
39, electric capacity C
40with logarithmic amplifier AD8310; Wherein, connect successively between ultrasonic signal logarithmic amplifying circuit input end and the INHI pin of logarithmic amplifier AD8310 and access resistance R
36, electric capacity C
33; At resistance R
36with electric capacity C
33between select a node, between this node and earth terminal, access electric capacity C
34; Resistance R is accessed between the INHI pin of logarithmic amplifier AD8310 and INLO pin
38; Electric capacity C is accessed between the INLO pin of logarithmic amplifier AD8310 and earth terminal
38; The COMM pin ground connection of logarithmic amplifier AD8310; Electric capacity C is accessed between the BFIN pin of logarithmic amplifier AD8310 and earth terminal
36; Between+5VT voltage and earth terminal, series connection accesses resistance R successively
37, electric capacity C
35; Resistance R
37with electric capacity C
35between select a node to connect ENBL pin, the Vpos pin of logarithmic amplifier AD8310 simultaneously; Electric capacity C is accessed between the OFLT pin of logarithmic amplifier AD8310 and earth terminal
37; The Vout pin of logarithmic amplifier AD8310 and signal output part are connected successively and are accessed resistance R
39, electric capacity C
40; At resistance R
39with electric capacity C
40between select a node, access electric capacity C between this node and earth terminal
39; At electric capacity C
40and between signal output part, selecting a node, this node and earth terminal access resistance R
40;
Ultrasonic signal peak-detector circuit comprises resistance R
40, resistance R
40, resistance R
40, resistance R
40, resistance R
40, resistance R
40, electric capacity C
41, electric capacity C
42, electric capacity C
43, diode D
5, diode D
6, the two amplifier AD8058 of the first Voltage Feedback and the two amplifier AD8058 of the second Voltage Feedback; Wherein, the pin 3 of the two amplifier AD8058 of the first Voltage Feedback is as signal input part; Resistance R is accessed between the pin 8 of the two amplifier AD8058 of the first Voltage Feedback and+5VT voltage
41; At pin 8 and the resistance R of the two amplifier AD8058 of the first Voltage Feedback
41between select a node, access electric capacity C between this node and earth terminal
41; Resistance R is accessed between the pin 4 of the two amplifier AD8058 of the first Voltage Feedback and-5VT voltage
43; Electric capacity C is accessed between the pin 4 of the two amplifier AD8058 of the first Voltage Feedback and earth terminal
42; The pin two connecting resistance R respectively of the two amplifier AD8058 of the first Voltage Feedback
42one end, diode D
6negative pole, resistance R
42another termination-5VT voltage, diode D
6positive pole connect the pin one of the two amplifier AD8058 of the first Voltage Feedback; The pin one of the two amplifier AD8058 of the first Voltage Feedback meets diode D
5positive pole, diode D
5negative pole connect the pin 5 of the two amplifier AD8058 of the second Voltage Feedback; Resistance R
44be connected in parallel on diode D
5two ends; At diode D
5negative pole and the pin 5 of the two amplifier AD8058 of the second Voltage Feedback between select a node, access electric capacity C in parallel between this node with earth terminal
43with resistance R
46, and resistance R is accessed between this node and-5VU voltage
45; Pin 4 and the pin 8 of the two amplifier AD8058 of the second Voltage Feedback are all in high-impedance state; The pin 6 adapter pin 7 of the two amplifier AD8058 of the second Voltage Feedback; The pin 7 of the two amplifier AD8058 of the second Voltage Feedback draws wire, as the signal output part of ultrasonic signal peak-detector circuit.
Below in conjunction with accompanying drawing, multi-way switch cabinet acoustoelectric signal harvester is described further.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of multi-way switch cabinet acoustoelectric signal harvester of the present utility model;
Fig. 2 is the anatomical connectivity vertical view of pair signals conditioning module and master control acquisition process circuit module in the utility model;
Fig. 3 is the left view of the structure of pair signals conditioning module in the utility model;
Fig. 4 is the circuit diagram of TEV signal conditioning circuit module in the utility model;
Fig. 5 is the circuit diagram of ultrasonic signal conditioning circuit module in the utility model
Embodiment
As shown in Figure 1, the present embodiment comprises paired sensor assembly 1, pair signals conditioning module 2, master control collection analysis circuit module 3, power supply unit 4, backstage 5; The present embodiment adopts that three sensor assemblies, 1, three pair signals conditioning module, 2, sensor assembly 1 is corresponding with pair signals conditioning module 2 to work; Local discharge signal in switch cubicle is delivered to pair signals conditioning module 2 by sensor assembly 1, pair signals conditioning module 2 carries out A/D conversion after the signal received is carried out filtering, amplification, peak detection process, signal after conversion delivers to master control collection analysis circuit mould fast 3, carried out data operation process by master control collection analysis circuit mould fast 3, extracted local discharge characteristic data, and Monitoring Data is uploaded to backstage 5, the collection analysis of master control simultaneously circuit mould fast 3 realizes LCD screen by the mode of expansion and shows on the spot;
As shown in Figure 2, composition graphs 3, the present embodiment also comprises first substrate 6 and second substrate 7, and pair signals conditioning module 2 is all arranged on first substrate 6; Master control collection analysis circuit module 3 and power supply unit 4 are all fixed on second substrate 7; Sensor assembly 1 is embedded in (not shown) in switch cubicle; The signal output part of pair signals conditioning module 2 is connected through the signal input part of winding displacement with master control collection analysis circuit module 3; Pair signals conditioning module 2, master control collection analysis circuit module 3 are powered by power supply unit 4.
Below the detailed description to each module:
Sensor assembly 1 is made up of TEV sensor 11 and ultrasonic sensor 12; The present embodiment adopts three sensor assemblies 1 (in other actual conditions, can adopt multiple to Signal-regulated kinase 2 according to specific needs); Three sensor assemblies 1, are embedded in switch cabinet bus cabin, isolating switch cabin, cable tank indoor, respectively for receiving key cabinet local discharge signal.
Pair signals conditioning module 2 is made up of TEV signal conditioning circuit module 21, ultrasonic signal conditioning circuit module 22, two AD conversion module 23; Three pair signals conditioning module 2 are fixed on first substrate 6 through the first contact pin connector 26 side by side; TEV signal conditioning circuit module 21 and ultrasonic signal conditioning circuit module 22 all cover with radome 24, noise decrease and electromagnetic interference (EMI); The signal input part of TEV signal conditioning circuit module 21 and ultrasonic signal conditioning circuit module 22 is all connected to bnc interface 25;
Detectable signal is passed to TEV signal conditioning circuit module 21 through bnc interface 25 by TEV sensor 11; The output termination of TEV signal conditioning circuit module 21 is connected with the signal input part of an AD conversion 23, and the signal output part of this AD conversion 23 is electrically connected with FPC seat 27; By the signal of TEV sensor 11 feed-in after TEV signal conditioning circuit module 21 processes, carry out AD conversion, the signal after conversion is sent to master control acquisition process circuit module 3 through FPC seat 27;
Detectable signal is passed to ultrasonic signal conditioning circuit module 22 through bnc interface 25 by ultrasonic sensor 12; The output termination of ultrasonic signal conditioning circuit module 22 is connected with the signal input part of another AD conversion 23, and the signal output part of this AD conversion 23 is electrically connected with FPC seat 27; By the signal of ultrasonic sensor 12 feed-in after ultrasonic signal conditioning circuit module 22 processes, carry out AD conversion, the signal after conversion is sent to master control acquisition process circuit module 3 through FPC seat 27.
Master control acquisition process circuit module 3 comprises mainboard 31, expansion interface 32,485 interface 33 and minimum system plate 34; Mainboard 31 is arranged on second substrate 7;
Expansion interface 32 and 485 interface 33 is drawn by mainboard 31; Minimum system plate 34 is arranged on mainboard 31, and is connected with mainboard 31 through contact pin connector; The modular design that whole master control acquisition process circuit module 3 adopts minimum system plate 34 discrete with expansion; The signal input part of minimum system plate 34 is connected through the FPC seat 27 that winding displacement and three pair signals conditioning module 2 are respective; Minimum system plate 34 receives the switch cubicle discharge signal after processing from three pair signals conditioning module 2, local discharge characteristic data are extracted for ground electric wave and ultrasonic signal feature design local discharge information extraction algorithm, and Monitoring Data to be uploaded with Modbus agreement and is supported that the displaying such as electric discharge amplitude, historical data curve is carried out, to facilitate long-range data of checking in the backstage 5 of this agreement by the RS485 interface 33 of drawing eventually through mainboard 31; Meanwhile, also realize LCD screen by expansion interface 32 to show on the spot;
Power supply unit 4 is arranged on second substrate 7; The excitation output terminal of power supply unit 4 is drawn the second contact pin connector 43, second contact pin connector 43 and to be gone between with the excitation input end of master control collection analysis circuit module 3 through solder joint 42 and be connected; The power input of power supply unit 4 is drawn another and is organized the second contact pin connector 43, and this group contact pin connector is connected with power interface 41 through another assembly welding point 42; Adopt totally-enclosed encapsulation technology to increase radome to power supply unit 4, ensure that power supply unit 4 reduces the interference of system by external environment.
Below that the circuit layout of TEV signal conditioning circuit module 21 and ultrasonic signal conditioning circuit module 22 is described:
As shown in Figure 4, TEV signal conditioning circuit module 21 comprises TEV signaling multilevel filtering circuit 211, TEV signal logarithmic amplifying circuit 212, TEV signal peak detecting circuit 213; Wherein, the input end of the output termination TEV signal logarithmic amplifying circuit 212 of TEV signaling multilevel filtering circuit 211; The input end 213 of the output termination TEV signal peak detecting circuit of TEV signal logarithmic amplifying circuit 212; Below to TEV signaling multilevel filtering circuit 211, TEV signal logarithmic amplifying circuit 212 and the function of TEV signal peak detecting circuit 213, the description of Butut in the present embodiment:
TEV signaling multilevel filtering circuit 211 comprises: resistance R
1, resistance R
2, resistance R
3, resistance R
4, resistance R
5, resistance R
6, resistance R
7, resistance R
8, resistance R
9, resistance R
10, electric capacity C
1, electric capacity C
2, electric capacity C
3, electric capacity C
4, electric capacity C
5, electric capacity C
6, electric capacity C
7, electric capacity C
8, electric capacity C
9, electric capacity C
10, electric capacity C
11, inductance L
1, inductance L
2, diode D
1with diode D
2; Wherein, the input end of TEV signaling multilevel filtering circuit 211 is to series connection access electric capacity C successively between output terminal
5, resistance R
8, inductance L
1and inductance L
2; At TEV signaling multilevel filtering circuit 211 input end and electric capacity C
5between select a node, this node respectively with diode D
1positive pole, diode D
2negative pole connect; Diode D
1negative pole and+5VU voltage between access resistance R
1; Diode D
1with resistance R
1between select a node, between this node and earth terminal, access resistance R
3, resistance R
2with electric capacity C
2connect rear and resistance R
3in parallel; Resistance R
1and select a node between+5VU voltage, access electric capacity C between this node and earth terminal
1; Diode D
2positive pole and-5VU voltage between access resistance R
4; Diode D
2with resistance R
4between select a node, between this node and earth terminal, access resistance R
6, resistance R
5with electric capacity C
4connect rear and resistance R
6in parallel; Resistance R
4and select a node between-5VU voltage, access electric capacity C between this node and earth terminal
3; At electric capacity C
5with resistance R
8between select a node, access resistance R between this node and earth terminal
7; At resistance R
8and inductance L
1between select a node, access resistance R in parallel between this node and earth terminal
9, electric capacity C
6, electric capacity C
7; In inductance L
1and inductance L
2between select a node, access electric capacity C in parallel between this node and earth terminal
8, electric capacity C
9; In inductance L
2and select a node between the output terminal of TEV signaling multilevel filtering circuit 211, access electric capacity C in parallel between this node and earth terminal
10, electric capacity C
11, resistance R
10;
TEV signal logarithmic amplifying circuit 212 comprises: resistance R
11, resistance R
12, resistance R
13, electric capacity C
12, electric capacity C
13, electric capacity C
14, electric capacity C
15, electric capacity C
16with logarithmic amplifier AD8310; Wherein, electric capacity C is accessed between the INHI pin of TEV signal logarithmic amplifying circuit 212 input end and logarithmic amplifier AD8310
12, electric capacity C
12and select a node between INHI pin, between this node and earth terminal, access resistance R
11; Electric capacity C is accessed between the INLO pin of logarithmic amplifier AD8310 and earth terminal
15; Resistance R is accessed between the INHI pin of logarithmic amplifier AD8310 and INLO pin
13; The COMM pin ground connection of logarithmic amplifier AD8310; Electric capacity C is accessed between the BFIN pin of logarithmic amplifier AD8310 and earth terminal
14; Between+5VT voltage and earth terminal, series connection accesses resistance R successively
12, electric capacity C
13; Resistance R
12with electric capacity C
13between select a node to connect ENBL pin, the Vpos pin of logarithmic amplifier AD8310 simultaneously; Electric capacity C is accessed between the OFLT pin of logarithmic amplifier AD8310 and earth terminal
16; The Vout pin of logarithmic amplifier AD8310 draws the signal output part of wire as TEV signal logarithmic amplifying circuit 212;
TEV signal peak detecting circuit 213 comprises resistance R
14, resistance R
15, resistance R
16, resistance R
17, electric capacity C
17, electric capacity C
18, electric capacity C
19, diode D
3, diode D
4, operational amplifier A D8066 and operational amplifier A D8056; Wherein, the pin 3 of operational amplifier A D8066 is as signal input part; Resistance R is accessed between the pin 8 of operational amplifier A D8066 and+5VT voltage
14; At pin 8 and the resistance R of operational amplifier A D8066
14between select a node, access electric capacity C between this node and earth terminal
17; Resistance R is accessed between the pin 4 of operational amplifier A D8066 and-5VT voltage
16; Electric capacity C is accessed between the pin 4 of operational amplifier A D8066 and earth terminal
18; The pin two connecting resistance R respectively of operational amplifier A D8066
15one end, diode D
3negative pole, resistance R
15another termination-5VT voltage, diode D
3positive pole connect the pin one of operational amplifier A D8066; The pin one of operational amplifier A D8066 meets diode D
4positive pole, diode D
4negative pole connect the pin 5 of operational amplifier A D8056; At diode D
4negative pole and the pin 5 of operational amplifier A D8056 between select a node, access electric capacity C between this node and earth terminal
19, between this node and-5VT, access resistance R
17; Pin 4 and the pin 8 of operational amplifier A D8056 are all in high-impedance state; The pin 6 adapter pin 7 of operational amplifier A D8056; The pin 7 of operational amplifier A D8056 draws wire, as the signal output part of TEV signal peak detecting circuit 213.
As shown in Figure 5, ultrasonic signal pre-amplification circuit 221 comprises resistance R
18, resistance R
19, resistance R
20, resistance R
21, resistance R
22, resistance R
23, resistance R
24, resistance R
25, resistance R
26, resistance R
27, resistance R
28, resistance R
29, resistance R
30, resistance R
31, resistance R
32, resistance R
33, electric capacity C
20, electric capacity C
21, electric capacity C
22, electric capacity C
23, electric capacity C
24, electric capacity C
25, electric capacity C
26, electric capacity C
27, electric capacity C
28, electric capacity C
29, electric capacity C
30, electric capacity C
31, the two amplifier AD8058 of first instrument amplifier INA128, second instrument amplifier INA128 and Voltage Feedback; Wherein, electric capacity C is accessed between the signal input part of ultrasonic signal pre-amplification circuit 221 and the pin 3 of first instrument amplifier INA128
21; The pin two of first instrument amplifier INA128 accesses electric capacity C with connecting successively between earth point
20, R
18; Between the pin two of first instrument amplifier INA128 and pin 3, series connection accesses resistance R successively
19, resistance R
20; At resistance R
19with resistance R
20between select a node ground connection; Resistance R is accessed between the pin one of first instrument amplifier INA128 and pin 8
21; Between+5VU voltage and earth terminal, series connection accesses resistance R successively
22, electric capacity C
22; At resistance R
22with electric capacity C
22between select a node to be connected with the pin 7 of first instrument amplifier INA128; Between-5VU voltage and earth terminal, series connection accesses resistance R successively
23, electric capacity C
23; Resistance R
23with electric capacity C
23between select a node to be connected with the pin 4 of first instrument amplifier INA128; Electric capacity C is accessed between the pin 6 of first instrument amplifier INA128 and the pin 3 of second instrument amplifier INA128
24; At pin 3 and the electric capacity C of second instrument amplifier INA128
24between select a node, access resistance R between this node and earth terminal
24; The pin two of second instrument amplifier INA128 is connected rear ground connection with the pin 7 of first instrument amplifier INA128, the pin 5 of first instrument amplifier INA128, the pin 5 of second instrument amplifier INA128 successively; Resistance R is accessed between the pin one of second instrument amplifier INA128 and pin 8
26; Between+5VU voltage and earth terminal, series connection accesses resistance R successively
25, electric capacity C
25; At resistance R
25with electric capacity C
25between select a node to be connected with the pin 7 of second instrument amplifier INA128; Between-5VU voltage and earth terminal, series connection accesses resistance R successively
27, electric capacity C
26; Resistance R
27with electric capacity C
26between select a node to be connected with the pin 4 of second instrument amplifier INA128; Between the pin two of the pin 6 of second instrument amplifier INA128 and the two amplifier AD8058 of Voltage Feedback, series connection accesses electric capacity C successively
27, resistance R
28, electric capacity C
30; At resistance R
28with electric capacity C
30between select a node, access resistance R between this node and earth terminal
29, connect successively between this node and the pin two of the two amplifier AD8058 of Voltage Feedback simultaneously and access electric capacity C
29, resistance R
31; Electric capacity C
29with resistance R
31between select a node, the pin one of the two amplifier AD8058 of this node and Voltage Feedback is connected; Resistance R is accessed between the pin 3 of the two amplifier AD8058 of Voltage Feedback and earth terminal
30; Between+5VU voltage and earth terminal, series connection accesses resistance R successively
32, electric capacity C
31; At resistance R
32with electric capacity C
31between select the pin 8 of the two amplifier AD8058 of a node and Voltage Feedback to be connected; Between-5VU voltage and earth terminal, series connection accesses resistance R successively
33, electric capacity C
28; At resistance R
33with electric capacity C
28between select the pin 4 of the two amplifier AD8058 of a node and Voltage Feedback to be connected; The pin one of the two amplifier AD8058 of Voltage Feedback draws the signal output part of a wire as ultrasonic signal pre-amplification circuit 221;
Ultrasonic signal bandwidth-limited circuit 222 comprises resistance R
34, resistance R
35, electric capacity C
32, inductance L
3; Wherein, the signal input part of ultrasonic signal bandwidth-limited circuit 222 is connected successively with output terminal and is accessed electric capacity C
32, inductance L
3; At electric capacity C
32and inductance L
3between select a node, access resistance R between this node and earth terminal
34; In inductance L
3and between output terminal, select a node, access resistance R between this node and earth terminal
35;
Ultrasonic signal logarithmic amplifying circuit 223 comprises resistance R
36, resistance R
37, resistance R
38, resistance R
39, resistance R
40, electric capacity C
33, electric capacity C
34, electric capacity C
35, electric capacity C
36, electric capacity C
37, electric capacity C
38, electric capacity C
39, electric capacity C
40with logarithmic amplifier AD8310; Wherein, connect successively between ultrasonic signal logarithmic amplifying circuit 223 input end and the INHI pin of logarithmic amplifier AD8310 and access resistance R
36, electric capacity C
33; At resistance R
36with electric capacity C
33between select a node, between this node and earth terminal, access electric capacity C
34; Resistance R is accessed between the INHI pin of logarithmic amplifier AD8310 and INLO pin
38; Electric capacity C is accessed between the INLO pin of logarithmic amplifier AD8310 and earth terminal
38; The COMM pin ground connection of logarithmic amplifier AD8310; Electric capacity C is accessed between the BFIN pin of logarithmic amplifier AD8310 and earth terminal
36; Between+5VT voltage and earth terminal, series connection accesses resistance R successively
37, electric capacity C
35; Resistance R
37with electric capacity C
35between select a node to connect ENBL pin, the Vpos pin of logarithmic amplifier AD8310 simultaneously; Electric capacity C is accessed between the OFLT pin of logarithmic amplifier AD8310 and earth terminal
37; The Vout pin of logarithmic amplifier AD8310 and signal output part are connected successively and are accessed resistance R
39, electric capacity C
40; At resistance R
39with electric capacity C
40between select a node, access electric capacity C between this node and earth terminal
39; At electric capacity C
40and between signal output part, selecting a node, this node and earth terminal access resistance R
40;
Ultrasonic signal peak-detector circuit 224 comprises resistance R
40, resistance R
40, resistance R
40, resistance R
40, resistance R
40, resistance R
40, electric capacity C
41, electric capacity C
42, electric capacity C
43, diode D
5, diode D
6, the two amplifier AD8058 of the first Voltage Feedback and the two amplifier AD8058 of the second Voltage Feedback; Wherein, the pin 3 of the two amplifier AD8058 of the first Voltage Feedback is as signal input part; Resistance R is accessed between the pin 8 of the two amplifier AD8058 of the first Voltage Feedback and+5VT voltage
41; At pin 8 and the resistance R of the two amplifier AD8058 of the first Voltage Feedback
41between select a node, access electric capacity C between this node and earth terminal
41; Resistance R is accessed between the pin 4 of the two amplifier AD8058 of the first Voltage Feedback and-5VT voltage
43; Electric capacity C is accessed between the pin 4 of the two amplifier AD8058 of the first Voltage Feedback and earth terminal
42; The pin two connecting resistance R respectively of the two amplifier AD8058 of the first Voltage Feedback
42one end, diode D
6negative pole, resistance R
42another termination-5VT voltage, diode D
6positive pole connect the pin one of the two amplifier AD8058 of the first Voltage Feedback; The pin one of the two amplifier AD8058 of the first Voltage Feedback meets diode D
5positive pole, diode D
5negative pole connect the pin 5 of the two amplifier AD8058 of the second Voltage Feedback; Resistance R
44be connected in parallel on diode D
5two ends; At diode D
5negative pole and the pin 5 of the two amplifier AD8058 of the second Voltage Feedback between select a node, access electric capacity C in parallel between this node with earth terminal
43with resistance R
46, and resistance R is accessed between this node and-5VU voltage
45; Pin 4 and the pin 8 of the two amplifier AD8058 of the second Voltage Feedback are all in high-impedance state; The pin 6 adapter pin 7 of the two amplifier AD8058 of the second Voltage Feedback; The pin 7 of the two amplifier AD8058 of the second Voltage Feedback draws wire, as the signal output part of ultrasonic signal peak-detector circuit 224.
Above-described embodiment is only be described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection domain that the utility model claims determine.
Claims (8)
1. a multi-way switch cabinet acoustoelectric signal harvester, comprises into sensor assembly (1), power supply unit (4), backstage (5); Sensor assembly (1) is made up of TEV sensor (11) and ultrasonic sensor (12); Sensor assembly (1) is embedded in switch cubicle; Power supply unit (4) is for providing power supply; It is characterized in that,
Also comprise pair signals conditioning module (2); Pair signals conditioning module (2) is made up of TEV signal conditioning circuit module (21), ultrasonic signal conditioning circuit module (22), two AD conversion module (23); The signal output part of TEV sensor (11) is electrically connected with TEV signal conditioning circuit module (21) signal input part, and TEV signal conditioning circuit module (21) signal output part is electrically connected with AD conversion module (23) signal input part; The signal output part of ultrasonic sensor (12) is electrically connected with the signal input part of ultrasonic signal conditioning circuit module (22), and ultrasonic signal conditioning circuit module (22) signal output part is electrically connected with another AD conversion module (23) signal input part; Two AD conversion module (23) are all electrically connected with the signal input part of master control collection analysis circuit module (3); The communication interface of master control collection analysis circuit module (3) is connected with backstage (5).
2. multi-way switch cabinet acoustoelectric signal harvester according to claim 1, it is characterized in that, described TEV signal conditioning circuit module (21) comprises TEV signaling multilevel filtering circuit (211), TEV signal logarithmic amplifying circuit (212), TEV signal peak detecting circuit (213); Wherein, the signal input part of TEV signaling multilevel filtering circuit (211) is electrically connected with TEV sensor (11) signal output part; The signal output part of TEV signaling multilevel filtering circuit (211) is electrically connected with the signal input part of TEV signal logarithmic amplifying circuit (213); The signal output part of TEV signal logarithmic amplifying circuit (213) is electrically connected with the input end of TEV signal peak detecting circuit (213).
3. multi-way switch cabinet acoustoelectric signal harvester according to claim 2, it is characterized in that, ultrasonic signal conditioning circuit module (22) comprises ultrasonic signal pre-amplification circuit (221), ultrasonic signal bandwidth-limited circuit (222), ultrasonic signal logarithmic amplification electricity (223), ultrasonic signal peak-detector circuit (224); Wherein, the signal input part of ultrasonic signal pre-amplification circuit (221) is electrically connected with the signal output part of ultrasonic sensor (12); The signal output part of ultrasonic signal pre-amplification circuit (221) is electrically connected with the signal input part of ultrasonic signal bandwidth-limited circuit (222); The signal output part of ultrasonic signal bandwidth-limited circuit (222) is electrically connected with the signal input part of ultrasonic signal logarithmic amplification electricity (223); The signal output part of ultrasonic signal logarithmic amplification electricity (223) is electrically connected with the signal input part of ultrasonic signal peak-detector circuit (224).
4. multi-way switch cabinet acoustoelectric signal harvester according to claim 3, is characterized in that,
TEV signal conditioning circuit module (21) is covered by radome (24); The signal input part of TEV signal conditioning circuit module (21) connects the signal output part of TEV sensor (11) through bnc interface (25);
Ultrasonic signal conditioning circuit module (22) is covered by radome (24); The signal input part of ultrasonic signal conditioning circuit module (22) connects the signal output part of ultrasonic sensor (12) through another bnc interface (25);
The signal output part of two AD conversion module (23) is all electrically connected with FPC seat (27), and FPC seat (27) is electrically connected through the signal input part of winding displacement with master control collection analysis circuit module (3).
5. multi-way switch cabinet acoustoelectric signal harvester according to claim 4, is characterized in that, pair signals conditioning module (2) is fixed on first substrate (6) through the first contact pin connector (26); Power supply unit (4) is all fixed on second substrate (7);
6. multi-way switch cabinet acoustoelectric signal harvester according to claim 5, it is characterized in that, power supply unit (4) is protected by radome; The output terminal of power supply unit (4) draws the second contact pin connector (43), and the second contact pin connector (43) is connected through the power input lead of solder joint (42) with master control collection analysis circuit module (3); The power input of power supply unit (4) is drawn another and is organized the second contact pin connector (43), and this group second contact pin connector is connected with power interface (41) through another assembly welding point (42).
7. multi-way switch cabinet acoustoelectric signal harvester according to claim 2, is characterized in that,
TEV signaling multilevel filtering circuit (211) comprising: resistance R
1, resistance R
2, resistance R
3, resistance R
4, resistance R
5, resistance R
6, resistance R
7, resistance R
8, resistance R
9, resistance R
10, electric capacity C
1, electric capacity C
2, electric capacity C
3, electric capacity C
4, electric capacity C
5, electric capacity C
6, electric capacity C
7, electric capacity C
8, electric capacity C
9, electric capacity C
10, electric capacity C
11, inductance L
1, inductance L
2, diode D
1with diode D
2; Wherein, the input end of TEV signaling multilevel filtering circuit (211) is to series connection access electric capacity C successively between output terminal
5, resistance R
8, inductance L
1and inductance L
2; At TEV signaling multilevel filtering circuit (211) input end and electric capacity C
5between select a node, this node respectively with diode D
1positive pole, diode D
2negative pole connect; Diode D
1negative pole and+5VU voltage between access resistance R
1; Diode D
1with resistance R
1between select a node, between this node and earth terminal, access resistance R
3, resistance R
2with electric capacity C
2connect rear and resistance R
3in parallel; Resistance R
1and select a node between+5VU voltage, access electric capacity C between this node and earth terminal
1; Diode D
2positive pole and-5VU voltage between access resistance R
4; Diode D
2with resistance R
4between select a node, between this node and earth terminal, access resistance R
6, resistance R
5with electric capacity C
4connect rear and resistance R
6in parallel; Resistance R
4and select a node between-5VU voltage, access electric capacity C between this node and earth terminal
3; At electric capacity C
5with resistance R
8between select a node, access resistance R between this node and earth terminal
7; At resistance R
8and inductance L
1between select a node, access resistance R in parallel between this node and earth terminal
9, electric capacity C
6, electric capacity C
7; In inductance L
1and inductance L
2between select a node, access electric capacity C in parallel between this node and earth terminal
8, electric capacity C
9; In inductance L
2and select a node between the output terminal of TEV signaling multilevel filtering circuit (211), access electric capacity C in parallel between this node and earth terminal
10, electric capacity C
11, resistance R
10;
TEV signal logarithmic amplifying circuit (212) comprising: resistance R
11, resistance R
12, resistance R
13, electric capacity C
12, electric capacity C
13, electric capacity C
14, electric capacity C
15, electric capacity C
16with logarithmic amplifier AD8310; Wherein, electric capacity C is accessed between TEV signal logarithmic amplifying circuit (212) input end and the INHI pin of logarithmic amplifier AD8310
12, electric capacity C
12and select a node between INHI pin, between this node and earth terminal, access resistance R
11; Electric capacity C is accessed between the INLO pin of logarithmic amplifier AD8310 and earth terminal
15; Resistance R is accessed between the INHI pin of logarithmic amplifier AD8310 and INLO pin
13; The COMM pin ground connection of logarithmic amplifier AD8310; Electric capacity C is accessed between the BFIN pin of logarithmic amplifier AD8310 and earth terminal
14; Between+5VT voltage and earth terminal, series connection accesses resistance R successively
12, electric capacity C
13; Resistance R
12with electric capacity C
13between select a node to connect ENBL pin, the Vpos pin of logarithmic amplifier AD8310 simultaneously; Electric capacity C is accessed between the OFLT pin of logarithmic amplifier AD8310 and earth terminal
16; The Vout pin of logarithmic amplifier AD8310 draws the signal output part of wire as TEV signal logarithmic amplifying circuit (212);
TEV signal peak detecting circuit (213) comprises resistance R
14, resistance R
15, resistance R
16, resistance R
17, electric capacity C
17, electric capacity C
18, electric capacity C
19, diode D
3, diode D
4, operational amplifier A D8066 and operational amplifier A D8056; Wherein, the pin 3 of operational amplifier A D8066 is as signal input part; Resistance R is accessed between the pin 8 of operational amplifier A D8066 and+5VT voltage
14; At pin 8 and the resistance R of operational amplifier A D8066
14between select a node, access electric capacity C between this node and earth terminal
17; Resistance R is accessed between the pin 4 of operational amplifier A D8066 and-5VT voltage
16; Electric capacity C is accessed between the pin 4 of operational amplifier A D8066 and earth terminal
18; The pin two connecting resistance R respectively of operational amplifier A D8066
15one end, diode D
3negative pole, resistance R
15another termination-5VT voltage, diode D
3positive pole connect the pin one of operational amplifier A D8066; The pin one of operational amplifier A D8066 meets diode D
4positive pole, diode D
4negative pole connect the pin 5 of operational amplifier A D8056; At diode D
4negative pole and the pin 5 of operational amplifier A D8056 between select a node, access electric capacity C between this node and earth terminal
19, between this node and-5VT, access resistance R
17; Pin 4 and the pin 8 of operational amplifier A D8056 are all in high-impedance state; The pin 6 adapter pin 7 of operational amplifier A D8056; The pin 7 of operational amplifier A D8056 draws wire, as the signal output part of TEV signal peak detecting circuit (213).
8. multi-way switch cabinet acoustoelectric signal harvester according to claim 3, is characterized in that,
Ultrasonic signal pre-amplification circuit (221) comprises resistance R
18, resistance R
19, resistance R
20, resistance R
21, resistance R
22, resistance R
23, resistance R
24, resistance R
25, resistance R
26, resistance R
27, resistance R
28, resistance R
29, resistance R
30, resistance R
31, resistance R
32, resistance R
33, electric capacity C
20, electric capacity C
21, electric capacity C
22, electric capacity C
23, electric capacity C
24, electric capacity C
25, electric capacity C
26, electric capacity C
27, electric capacity C
28, electric capacity C
29, electric capacity C
30, electric capacity C
31, the two amplifier AD8058 of first instrument amplifier INA128, second instrument amplifier INA128 and Voltage Feedback; Wherein, electric capacity C is accessed between the signal input part of ultrasonic signal pre-amplification circuit (221) and the pin 3 of first instrument amplifier INA128
21; The pin two of first instrument amplifier INA128 accesses electric capacity C with connecting successively between earth point
20, R
18; Between the pin two of first instrument amplifier INA128 and pin 3, series connection accesses resistance R successively
19, resistance R
20; At resistance R
19with resistance R
20between select a node ground connection; Resistance R is accessed between the pin one of first instrument amplifier INA128 and pin 8
21; Between+5VU voltage and earth terminal, series connection accesses resistance R successively
22, electric capacity C
22; At resistance R
22with electric capacity C
22between select a node to be connected with the pin 7 of first instrument amplifier INA128; Between-5VU voltage and earth terminal, series connection accesses resistance R successively
23, electric capacity C
23; Resistance R
23with electric capacity C
23between select a node to be connected with the pin 4 of first instrument amplifier INA128; Electric capacity C is accessed between the pin 6 of first instrument amplifier INA128 and the pin 3 of second instrument amplifier INA128
24; At pin 3 and the electric capacity C of second instrument amplifier INA128
24between select a node, access resistance R between this node and earth terminal
24; The pin two of second instrument amplifier INA128 is connected rear ground connection with the pin 7 of first instrument amplifier INA128, the pin 5 of first instrument amplifier INA128, the pin 5 of second instrument amplifier INA128 successively; Resistance R is accessed between the pin one of second instrument amplifier INA128 and pin 8
26; Between+5VU voltage and earth terminal, series connection accesses resistance R successively
25, electric capacity C
25; At resistance R
25with electric capacity C
25between select a node to be connected with the pin 7 of second instrument amplifier INA128; Between-5VU voltage and earth terminal, series connection accesses resistance R successively
27, electric capacity C
26; Resistance R
27with electric capacity C
26between select a node to be connected with the pin 4 of second instrument amplifier INA128; Between the pin two of the pin 6 of second instrument amplifier INA128 and the two amplifier AD8058 of Voltage Feedback, series connection accesses electric capacity C successively
27, resistance R
28, electric capacity C
30; At resistance R
28with electric capacity C
30between select a node, access resistance R between this node and earth terminal
29, connect successively between this node and the pin two of the two amplifier AD8058 of Voltage Feedback simultaneously and access electric capacity C
29, resistance R
31; Electric capacity C
29with resistance R
31between select a node, the pin one of the two amplifier AD8058 of this node and Voltage Feedback is connected; Resistance R is accessed between the pin 3 of the two amplifier AD8058 of Voltage Feedback and earth terminal
30; Between+5VU voltage and earth terminal, series connection accesses resistance R successively
32, electric capacity C
31; At resistance R
32with electric capacity C
31between select the pin 8 of the two amplifier AD8058 of a node and Voltage Feedback to be connected; Between-5VU voltage and earth terminal, series connection accesses resistance R successively
33, electric capacity C
28; At resistance R
33with electric capacity C
28between select the pin 4 of the two amplifier AD8058 of a node and Voltage Feedback to be connected; The pin one of the two amplifier AD8058 of Voltage Feedback draws the signal output part of a wire as ultrasonic signal pre-amplification circuit (221);
Ultrasonic signal bandwidth-limited circuit (222) comprises resistance R
34, resistance R
35, electric capacity C
32, inductance L
3; Wherein, the signal input part of ultrasonic signal bandwidth-limited circuit (222) is connected successively with output terminal and is accessed electric capacity C
32, inductance L
3; At electric capacity C
32and inductance L
3between select a node, access resistance R between this node and earth terminal
34; In inductance L
3and between output terminal, select a node, access resistance R between this node and earth terminal
35;
Ultrasonic signal logarithmic amplifying circuit (223) comprises resistance R
36, resistance R
37, resistance R
38, resistance R
39, resistance R
40, electric capacity C
33, electric capacity C
34, electric capacity C
35, electric capacity C
36, electric capacity C
37, electric capacity C
38, electric capacity C
39, electric capacity C
40with logarithmic amplifier AD8310; Wherein, connect successively between ultrasonic signal logarithmic amplifying circuit (223) input end and the INHI pin of logarithmic amplifier AD8310 and access resistance R
36, electric capacity C
33; At resistance R
36with electric capacity C
33between select a node, between this node and earth terminal, access electric capacity C
34; Resistance R is accessed between the INHI pin of logarithmic amplifier AD8310 and INLO pin
38; Electric capacity C is accessed between the INLO pin of logarithmic amplifier AD8310 and earth terminal
38; The COMM pin ground connection of logarithmic amplifier AD8310; Electric capacity C is accessed between the BFIN pin of logarithmic amplifier AD8310 and earth terminal
36; Between+5VT voltage and earth terminal, series connection accesses resistance R successively
37, electric capacity C
35; Resistance R
37with electric capacity C
35between select a node to connect ENBL pin, the Vpos pin of logarithmic amplifier AD8310 simultaneously; Electric capacity C is accessed between the OFLT pin of logarithmic amplifier AD8310 and earth terminal
37; The Vout pin of logarithmic amplifier AD8310 and signal output part are connected successively and are accessed resistance R
39, electric capacity C
40; At resistance R
39with electric capacity C
40between select a node, access electric capacity C between this node and earth terminal
39; At electric capacity C
40and between signal output part, selecting a node, this node and earth terminal access resistance R
40;
Ultrasonic signal peak-detector circuit (224) comprises resistance R
40, resistance R
40, resistance R
40, resistance R
40, resistance R
40, resistance R
40, electric capacity C
41, electric capacity C
42, electric capacity C
43, diode D
5, diode D
6, the two amplifier AD8058 of the first Voltage Feedback and the two amplifier AD8058 of the second Voltage Feedback; Wherein, the pin 3 of the two amplifier AD8058 of the first Voltage Feedback is as signal input part; Resistance R is accessed between the pin 8 of the two amplifier AD8058 of the first Voltage Feedback and+5VT voltage
41; At pin 8 and the resistance R of the two amplifier AD8058 of the first Voltage Feedback
41between select a node, access electric capacity C between this node and earth terminal
41; Resistance R is accessed between the pin 4 of the two amplifier AD8058 of the first Voltage Feedback and-5VT voltage
43; Electric capacity C is accessed between the pin 4 of the two amplifier AD8058 of the first Voltage Feedback and earth terminal
42; The pin two connecting resistance R respectively of the two amplifier AD8058 of the first Voltage Feedback
42one end, diode D
6negative pole, resistance R
42another termination-5VT voltage, diode D
6positive pole connect the pin one of the two amplifier AD8058 of the first Voltage Feedback; The pin one of the two amplifier AD8058 of the first Voltage Feedback meets diode D
5positive pole, diode D
5negative pole connect the pin 5 of the two amplifier AD8058 of the second Voltage Feedback; Resistance R
44be connected in parallel on diode D
5two ends; At diode D
5negative pole and the pin 5 of the two amplifier AD8058 of the second Voltage Feedback between select a node, access electric capacity C in parallel between this node with earth terminal
43with resistance R
46, and resistance R is accessed between this node and-5VU voltage
45; Pin 4 and the pin 8 of the two amplifier AD8058 of the second Voltage Feedback are all in high-impedance state; The pin 6 adapter pin 7 of the two amplifier AD8058 of the second Voltage Feedback; The pin 7 of the two amplifier AD8058 of the second Voltage Feedback draws wire, as the signal output part of ultrasonic signal peak-detector circuit (224).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420750518.2U CN204269766U (en) | 2014-12-03 | 2014-12-03 | A kind of multi-way switch cabinet acoustoelectric signal harvester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420750518.2U CN204269766U (en) | 2014-12-03 | 2014-12-03 | A kind of multi-way switch cabinet acoustoelectric signal harvester |
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| Publication Number | Publication Date |
|---|---|
| CN204269766U true CN204269766U (en) | 2015-04-15 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420750518.2U Expired - Fee Related CN204269766U (en) | 2014-12-03 | 2014-12-03 | A kind of multi-way switch cabinet acoustoelectric signal harvester |
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| Country | Link |
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| CN (1) | CN204269766U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360252A (en) * | 2014-12-03 | 2015-02-18 | 国家电网公司 | Acoustic and electric signal acquiring device and method of multichannel switch cabinet |
| CN106873582A (en) * | 2015-11-04 | 2017-06-20 | 罗伯特·博世有限公司 | Garden sensor device |
| CN110445481A (en) * | 2019-08-06 | 2019-11-12 | 中国科学院近代物理研究所 | A kind of sampling interval inhomogeneities amendment circuit and method |
| CN113884848A (en) * | 2021-09-23 | 2022-01-04 | 浙江华云电力工程设计咨询有限公司 | Anti-transient pulse interference switch cabinet partial discharge detection system |
-
2014
- 2014-12-03 CN CN201420750518.2U patent/CN204269766U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360252A (en) * | 2014-12-03 | 2015-02-18 | 国家电网公司 | Acoustic and electric signal acquiring device and method of multichannel switch cabinet |
| CN106873582A (en) * | 2015-11-04 | 2017-06-20 | 罗伯特·博世有限公司 | Garden sensor device |
| CN106873582B (en) * | 2015-11-04 | 2021-12-31 | 罗伯特·博世有限公司 | Garden sensor device |
| CN110445481A (en) * | 2019-08-06 | 2019-11-12 | 中国科学院近代物理研究所 | A kind of sampling interval inhomogeneities amendment circuit and method |
| CN113884848A (en) * | 2021-09-23 | 2022-01-04 | 浙江华云电力工程设计咨询有限公司 | Anti-transient pulse interference switch cabinet partial discharge detection system |
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