CN103941181A - Test device for acquiring on-off state of thyristor impulse power switch assembly - Google Patents
Test device for acquiring on-off state of thyristor impulse power switch assembly Download PDFInfo
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- CN103941181A CN103941181A CN201410138913.XA CN201410138913A CN103941181A CN 103941181 A CN103941181 A CN 103941181A CN 201410138913 A CN201410138913 A CN 201410138913A CN 103941181 A CN103941181 A CN 103941181A
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Abstract
The invention provides a test device for acquiring the on-off state of a thyristor impulse power switch assembly. The test device comprises a current sensor, a preprocessing circuit, a constant current source conversion circuit, a sampling resistor, a shaping and comparing circuit, a data collector, an electro-optic conversion circuit, a photovoltaic conversion circuit and a control module. The current sensor is arranged in a resistance-capacitance absorption circuit of a thyristor assembly in a sleeved mode. The input end of the preprocessing circuit is connected with the current sensor through a first double-core shielding double-twisted cable. The input end of the constant current source conversion circuit is connected with the output end of the preprocessing circuit. The input end of the shaping and comparing circuit is connected with the two ends of the sampling resistor. The input end of the data collector is connected with the two ends of the sampling resistor. The input end of the electro-optic conversion circuit is connected with the output end of the shaping and comparing circuit. The input end of the photovoltaic conversion circuit is connected with the output end of the electro-optic conversion circuit through a cable. The control module is connected with the output end of the photovoltaic conversion circuit. According to the test device, the work state of the impulse power switch assembly can be monitored fast, reliably and safely, state signals can be transmitted in a long distance, and the test device can adapt to a strong electromagnetic environment occasion.
Description
Technical field
The present invention relates to electron electric power technical field, particularly a kind of proving installation that obtains the component open-closed state of thyristor pulse power switch.
Background technology
Power Electronic Technique has developed into very high level at present, high-voltage and high-power power electronic device, for example IGBT(Insulated Gate Bipolar Transistor, igbt), power MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor, metal-oxide layer semiconductcor field effect transistor), GTO(Gate Turn-Off Thyristor, gate level turn-off thyristor), thyristor SCR(silicon controlled rectifier), IGCT(Intergrated Gate Commutated Thyristors, integrated gate commutated thyristor), MAGT(MOS gate pole control-thyristor) and IEGT(Injection Enhanced Gate Transistor, electron injection enhancement gate pole transistor) all succeed in developing and a large amount of through engineering approaches use, further promote the development of Pulse Power Techniques.In view of thyristor device has that voltage is high, electric current is large and high reliability, its be unique can with the element of not controlling type device and comparing favourably.It has been taken as pulse power switch at present, is widely used in the new concept weapon such as high energy weapon, electromagnetic launch system, simulated-nuclear explosion switchgear and new high-tech experimental provision.
Utilize two identical thyristors to press-fit back-to-back and serve as pulse power switch assembly (hereinafter to be referred as thyristor assembly), because operation is on-the-spot and control center's apart from each other, generally exceeding hundreds of rice.Therefore, the sensing head that this special running environment detects on off operating mode and subsequent treatment device thereof require very harsh, comprise following two aspects:
(1) while work due to thyristor assembly, voltage is up to thousands of volts, and the insulating property of the sensing head of requirement detection thyristor assembly on off operating mode must be up to tens of kilovolts;
(2) while work due to thyristor assembly, electric current is up to tens of kiloamperes, require to detect thyristor assembly on off operating mode and subsequent treatment device must there is the ability of good anti-strong electromagnetic.
Research shows, the condition that makes thyristor switch and assembly conducting thereof is that thyristor bears positive anode (A) voltage, and apply trigger pulse electric current at gate pole (G), i.e. voltage U GK>0 between voltage U AK>0 and gate pole and negative electrode between anode and negative electrode (K).A large amount of engineering practices show, while utilizing thyristor to serve as pulse power switch assembly, owing to driving loop fault to cause that thyristor assembly does not have the open fault of conducting, or because long-time logical heavy current is crossed the short trouble that thermal breakdown causes that thyristor assembly is straight-through, in addition, also having small part is because over-voltage breakdown causes the straight-through short trouble of thyristor assembly.These two kinds of faults all will directly affect the reliability and security of pulse power switch assembly operating.Therefore, in real time, accurately and the component open-closed running status of fast monitored change-over switch, to guarantee it can be safely, reliable and healthy move most important.
Summary of the invention
Object of the present invention is intended at least solve one of described technological deficiency.
For this reason, the object of the invention is to propose a kind of proving installation that obtains the component open-closed state of thyristor pulse power switch, this device can be fast, the duty of reliable and safety monitoring pulse power switch assembly, can long-distance transmissions status signal, can also adapt to strong electromagnetic environment occasion.
To achieve these goals, embodiments of the invention provide a kind of proving installation that obtains the component open-closed state of thyristor pulse power switch, comprise: current sensor, described current sensor is sheathed in the resistance-capacitance absorption loop of thyristor assembly, and the secondary wiring terminals of described current sensor is connected to respectively the two ends of terminal resistance; Pre-process circuit, the input end of described pre-process circuit is connected with the secondary wiring terminals of described current sensor by the first twin-core Shielded Twisted Pair cable, described pre-process circuit is for receiving the terminal voltage signal of described terminal resistance and described terminal voltage signal being carried out to pre-service, wherein, the terminal voltage signal of described terminal resistance is for characterizing the on off operating mode of thyristor pulse power switch assembly; Constant current source change-over circuit, the input end of described constant current source change-over circuit is connected with the output terminal of described pre-process circuit, and the output terminal of described constant current source change-over circuit is connected with the input end of the second twin-core shielding twisted wire cable, described constant current source change-over circuit is used for the terminal voltage signal of the terminal resistance that receives the on off operating mode for representing thyristor pulse power switch assembly, and described terminal voltage signal is converted to current signal, and described current signal transfer to described the second twin-core is shielded to twisted wire cable; Sampling resistor, the two ends of described sampling resistor are connected with the output terminal of described the second twin-core shielding twisted wire respectively, for receiving the current signal of described the second twin-core shielding twisted wire, and generate terminal voltage signal at the two ends of described sampling resistor; Shaping and comparator circuit, described shaping is connected with the input end of comparator circuit and the two ends of described sampling resistor, for receiving the terminal voltage signal of described sampling resistor, and obtain the low and high level signal of the on off operating mode that characterizes thyristor pulse power switch assembly according to the terminal voltage signal of described sampling resistor; Data acquisition unit, the input end of described data acquisition unit is connected with the two ends of described sampling resistor, obtains the analog quantity of the on off operating mode of thyristor pulse power switch assembly for receiving the terminal voltage signal of described sampling resistor with Real-time Collection; Electro-optical conversion circuit, the input end of described electro-optical conversion circuit is connected with the output terminal of comparator circuit with described shaping, for being converted to light pulse signal from the level signal of described shaping and comparator circuit; Photoelectric switching circuit, the input end of described photoelectric switching circuit is connected with the output terminal of described electro-optical conversion circuit by optical cable, for described light pulse signal conversion process being obtained to the voltage signal of the on off operating mode for characterizing thyristor pulse power switch assembly; Control module, described control module is connected with the output terminal of described photoelectric switching circuit, for according to the on off operating mode that detects thyristor pulse power switch assembly for characterizing the voltage signal of on off operating mode of thyristor pulse power switch assembly receiving.
In one embodiment of the invention, described current sensor is High-Voltage Insulation type current sensor, and wherein, described current sensor comprises: current sensor coil; Shield overcoat, be positioned at the skin of described current sensor coil, the input terminal of described current sensor and outlet terminal are drawn by described the first twin-core Shielded Twisted Pair; Insulating coating, described insulating coating is positioned at the skin of described shielding overcoat, and fills with and have fluid sealant in described insulating coating.
In yet another embodiment of the present invention, described pre-process circuit comprises: instrument operational amplifier, described instrument is with being parallel with the first resistance between the first pin of operational amplifier and the 8th pin, the second pin is connected with one end of the second resistance, the other end of described the second resistance is connected with one end of described terminal resistance, three-prong is connected with one end of the 3rd resistance, described the 3rd other end of resistance and the other end of described terminal resistance are connected, the 4th pin connects negative supply, the 5th pin ground connection, the 6th pin is connected with one end of the 4th resistance, another termination output port of described the 4th resistance, the 7th pin connects positive supply.
In another embodiment of the present invention, described constant current source change-over circuit comprises: the first operational amplifier, the electrode input end of described the first operational amplifier is connected with one end of the 5th resistance, described the 5th other end of resistance and the output port of described pre-process circuit are connected, the negative input of described the first operational amplifier is connected with one end of the 6th resistance, and described the 6th other end of resistance and the output port of described pre-process circuit are connected; Follower, the input end of described follower is connected with the output terminal of described the first operational amplifier; The second operational amplifier, the electrode input end of described the second operational amplifier is connected with the output terminal of described follower by resistance, negative input and output terminal short circuit, and output terminal is connected to the electrode input end of described the first operational amplifier, between the electrode input end of described the second operational amplifier and signal ground, be parallel with the first electric capacity, and the input end of the second twin-core shielding twisted wire described in two terminations of the first electric capacity, sampling resistor described in the output termination of described the second twin-core shielding twisted wire.
In one embodiment of the invention, described constant current source change-over circuit comprises: difference amplifier chip, and second of described difference amplifier chip is connected with the output port of described pre-process circuit with three-prong; Follower, the input end of described follower is connected with the output terminal of described difference amplifier chip; The second operational amplifier, the electrode input end of the second operational amplifier is connected with the output terminal of described follower by resistance, negative input and output terminal short circuit, and output terminal is connected to the first pin of described difference amplifier chip, between the electrode input end of described the second operational amplifier and signal ground, be parallel with the first electric capacity, and the input end of the second twin-core shielding twisted wire described in two terminations of the first electric capacity, sampling resistor described in the output termination of described the second twin-core shielding twisted wire.
In yet another embodiment of the present invention, described shaping and comparator circuit comprise: diode, and described diode anode is connected with one end of described sampling resistor by resistance, and negative electrode is connected with electrochemical capacitor is anodal, the minus earth of described electrochemical capacitor, described electrochemical capacitor and the second Capacitance parallel connection; The first comparer, the electrode input end of described the first comparer is connected with the electrode input end of described electrochemical capacitor by resistance, and the electrode input end of described the first comparer is further connected with the output terminal of the first comparer by resistance; The second comparer, described the second comparer negative input is connected with the positive terminal of described electrochemical capacitor by resistance, the electrode input end of described the second comparer is connected with the output terminal of described the second comparer by resistance, the first comparer is connected with the output terminal of the second comparer, and output characterizes the low and high level signal of the on off operating mode of thyristor pulse power switch assembly.
In another embodiment of the present invention, described electro-optical conversion circuit comprises: with gate drive circuit, described and the first pin gate drive circuit connects the low and high level signal of the on off operating mode that characterizes thyristor pulse power switch assembly, the second pin and the first pin short circuit; Send optical fiber head, described transmission optical fiber head is connected with the three-prong of gate drive circuit with described, low and high level signal is converted to light signal, and is sent to described photoelectric switching circuit by optical cable.
In one embodiment of the invention, described photoelectric switching circuit comprises: receive optical fiber head, described reception optical fiber head is connected with described optical cable, for receiving optical signals, and described light signal is converted to the voltage signal of the on off operating mode of corresponding sign thyristor pulse power switch assembly.
In yet another embodiment of the present invention, described optical cable is single core single-mode fiber or single core multimode optical fiber.
According to the proving installation that obtains the component open-closed state of thyristor pulse power switch of the embodiment of the present invention, current sensing head adopts insulated type structure, by current sensing head heeling-in having in the sheath of High-Voltage Insulation ability, utilize constant current source transmission to characterize the voltage signal of the on off operating mode of thyristor pulse power switch assembly, can detect easily the open fault of thyristor assembly operation or the voltage signal of short trouble, and this voltage signal is converted to current signal, can be used for long-distance transmissions, can also status information be uploaded to relevant host computer or correlation control unit in real time via optical cable, provide steering order for participating in blocking the important operations such as thyristor assembly driving pulse, solve the technical barrier that works in the remote state-detection of thyristor pulse power switch assembly under strong electromagnetic environment, guarantee that pulse power switch assembly can be healthy, safety, reliability service.
The aspect that the present invention is additional and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Brief description of the drawings
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination is understood becoming the description of embodiment obviously and easily, wherein:
Fig. 1 is according to the structural representation of the proving installation that obtains the component open-closed state of thyristor pulse power switch of the embodiment of the present invention;
Fig. 2 is the High-Voltage Insulation type structural representation according to the current sensor of the embodiment of the present invention;
Fig. 3 is according to the schematic diagram of the pre-process circuit of the embodiment of the present invention;
Fig. 4 is the schematic diagram of constant current source change-over circuit according to an embodiment of the invention;
Fig. 5 is the schematic diagram of constant current source change-over circuit in accordance with another embodiment of the present invention;
Fig. 6 is according to the schematic diagram of the shaping of the embodiment of the present invention and comparator circuit;
Fig. 7 is according to the schematic diagram of the electro-optical conversion circuit of the embodiment of the present invention;
Fig. 8 is according to the schematic diagram of the photoelectric switching circuit of the embodiment of the present invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Be exemplary below by the embodiment being described with reference to the drawings, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
In the present invention, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be also electrical connection; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can understand as the case may be above-mentioned term concrete meaning in the present invention.
Fig. 1 is according to the structural representation of the proving installation that obtains the component open-closed state of thyristor pulse power switch of the embodiment of the present invention.
As shown in Figure 1, the proving installation that obtains the component open-closed state of thyristor pulse power switch of the embodiment of the present invention, comprising: current sensor 2, the first twin-core Shielded Twisted Pair cable 3, pre-process circuit 4, constant current source change-over circuit 5, the second twin-core Shielded Twisted Pair cable 6, shaping and comparator circuit 7, data acquisition unit 12, electro-optical conversion circuit 8, optical cable 9, photoelectric switching circuit 10 and control module 11.The present invention can fast, reliably monitor the on off operating mode of pulse power switch assembly, guarantees that it is in the time moving each time, can be healthy, safety and reliably working.
First whole circuit structure and the workflow of the proving installation that obtains the component open-closed state of thyristor pulse power switch are described below.
Specifically, current sensor 2 is sheathed in capacitance-resistance (the being RC) absorption circuit that is enclosed within the thyristor assembly being made up of two back-to-back thyristor T1 and T2, subsequent process circuit is placed in the secondary low-voltage end of current sensor, by current sensor 2, itself and subsequent process circuit is carried out to electrical isolation.The secondary wiring terminals two ends of current sensor 2 are via interface P
1and P
2meet respectively terminal resistance R
ttwo ends, and via the first twin-core Shielded Twisted Pair cable 3 the input end P with pre-process circuit 4
3and P
4be connected, the input end P of the output terminal of pre-process circuit 4 and constant current source change-over circuit 5
5and P
6be connected, the input end P of the output terminal of constant current source change-over circuit 5 and the second twin-core Shielded Twisted Pair cable 6
7and P
8be connected, the output terminal P of the second twin-core Shielded Twisted Pair cable 6
9and P
10connect respectively sampling resistor R
ltwo ends, sampling resistor R
lterminal voltage V
lbe divided into two transmission paths, wherein a road is connected with data acquisition unit 12, and an other road is connected with the input end of comparator circuit 7 with shaping, the output terminal of shaping and comparator circuit 7 and the input end P of electro-optical conversion circuit 8
11and P
12be connected, the output terminal of electro-optical conversion circuit 8 is connected with photoelectric switching circuit 10 via optical cable 9, the input end P of the output terminal of photoelectric switching circuit 10 and host computer or correlation control unit 11
13and P
14be connected.
Fig. 2 is the High-Voltage Insulation type structural representation according to the current sensor of the embodiment of the present invention.
In one embodiment of the invention, current sensor can be High-Voltage Insulation type current sensor.As shown in Figure 2, current sensor comprises: current sensor coil 21, shielding overcoat 22 and insulating coating 23.Wherein, shielding overcoat 22 is positioned at the skin of current sensor coil 21, the input terminal P of current sensor 2
1with outlet terminal P
2draw by the first twin-core Shielded Twisted Pair 3.By said structure, as in insulating coating 23, insulating coating 23 is positioned at the skin of shielding overcoat 22, and the interior filling of insulating coating 23 has fluid sealant, is convenient to solidify said structure, strengthens the insulating capacity of whole sensing head.In an example of the present invention, current sensor coil 21 can be Luo-coil.
Fig. 3 is according to the schematic diagram of the pre-process circuit of the embodiment of the present invention.
The input end of pre-process circuit 4 is connected with the secondary wiring terminals of current sensor 2 by the first twin-core Shielded Twisted Pair cable 3, for receiving terminal resistance R
tterminal voltage signal and terminal voltage signal is carried out to pre-service.Wherein, terminal resistance R
tterminal voltage signal for characterizing the on off operating mode of thyristor pulse power switch assembly.
Pre-process circuit 4 comprises instrument operational amplifier, its China National Instruments Import & Export Corporation is with being parallel with the first resistance between the first pin of operational amplifier and the 8th pin, the second pin is connected with one end of the second resistance, the other end of the second resistance is connected with one end of terminal resistance, three-prong is connected with one end of the 3rd resistance, the 3rd other end of resistance and the other end of terminal resistance are connected, the 4th pin connects negative supply, the 5th pin ground connection, the 6th pin is connected with one end of the 4th resistance, another termination output port of the 4th resistance, the 7th pin connects positive supply.In an example of the present invention, instrument operational amplifier A P
1model can be AD620.
As shown in Figure 3, the connection terminal P of pre-process circuit 4
3and P
4, connect respectively terminal resistance R
t, terminal resistance R
ta termination the 3rd resistance R
41one end, the 3rd resistance R
41another termination instrument operational amplifier A P
1three-prong A
3pin, terminal resistance R
tanother termination second resistance R
42one end, the second resistance R
42another termination instrument operational amplifier A P
1the second pin A
2pin, the first resistance R
43be attempted by instrument operational amplifier A P
1the first pin A
1pin and the 8th pin A
8between pin, instrument operational amplifier A P
1the 7th pin A
7pin meets positive supply+V
dC1, instrument operational amplifier A P
1the 4th pin A
4pin meets negative supply-V
dC1, instrument operational amplifier A P
1the 5th pin A
5pin ground wire GND1, instrument operational amplifier A P
1output pin the 6th pin A
6connect the 4th resistance R
44one end, capacitor C
41a termination instrument operational amplifier A P
1three-prong A
3pin, capacitor C
41other end ground wire GND1, capacitor C
43one end ground wire GND1, capacitor C
43another termination positive supply+V
dC1, capacitor C
42a termination instrument operational amplifier A P
1the second pin A
2pin, capacitor C
42other end ground wire GND1, capacitor C
44one end ground wire GND1, capacitor C
44another termination negative supply-V
dC1, the 4th resistance R
44a termination instrument put AP with operational amplifier
1output pin the 6th pin A
6, the 4th resistance R
44another termination output port P
5, capacitor C
45a termination output port P
5, capacitor C
45another termination output port P
6, output port P
6ground wire GND1.
The input end of constant current source change-over circuit 5 is connected with the output terminal of pre-process circuit 4, and the output terminal of constant current source change-over circuit 5 is connected with the input end of the second twin-core shielding twisted wire cable 6.Constant current source change-over circuit 5 is for receiving the terminal resistance R of the on off operating mode that represents thyristor pulse power switch assembly
tterminal voltage signal, and terminal voltage signal is converted to current signal, and by current signal transfer to the second twin-core shielding twisted wire cable 6.
Constant current source change-over circuit 5 in the proving installation that obtains the component open-closed state of thyristor pulse power switch of the present invention can adopt operational amplifier or difference amplifier chip.With reference to figure 4 or Fig. 5, the constant current source change-over circuit 5 of above-mentioned two kinds of forms is described respectively below.
Fig. 4 is the schematic diagram of constant current source change-over circuit according to an embodiment of the invention.
Constant current source change-over circuit comprises: the first operational amplifier, follower and the second operational amplifier.Wherein, the electrode input end of the first operational amplifier is connected with one end of the 5th resistance, the 5th other end of resistance and the output port of pre-process circuit are connected, the negative input of the first operational amplifier is connected with one end of the 6th resistance, and the 6th other end of resistance and the output port of pre-process circuit are connected.The input end of follower is connected with the output terminal of the first operational amplifier.The electrode input end of the second operational amplifier is connected with the output terminal of follower by resistance, negative input and output terminal short circuit, and output terminal is connected to the electrode input end of the first operational amplifier, between the electrode input end of the second operational amplifier and signal ground, be parallel with the first electric capacity, and the input end of two termination the second twin-core shielding twisted wires of the first electric capacity, the output termination sampling resistor of the second twin-core shielding twisted wire.
As shown in Figure 4, the connection terminal P of constant current source change-over circuit 5
5connect the 6th resistance R
51one end, the 6th resistance R
51another termination the first operational amplifier A P
2negative input A
2pin, the connection terminal P of constant current source change-over circuit 5
6connect the 5th resistance R
52one end, the 5th resistance R
52another termination the first operational amplifier A P
2electrode input end A
3pin, resistance R
53be attempted by the first operational amplifier A P
2a
2pin and A
6between pin, the first operational amplifier A P
2a
4pin meets negative supply-V
dC1, the first operational amplifier A P
2a
7pin meets positive supply+V
dC1, resistance R
54a termination first operational amplifier A P
2a
3pin, resistance R
54another termination the second operational amplifier A P
4output pin C
6, capacitor C
51a termination negative supply-V
dC1, capacitor C
51other end ground wire GND1, capacitor C
52a termination positive supply+V
dC1, capacitor C
52other end ground wire GND1.Follower AP
3input pin B
2meet the first operational amplifier A P
2output pin A
6, follower AP
3b
5pin meets positive supply+V
dC1.Follower AP
3b
3pin meets negative supply-V
dC1, follower AP
3output pin B
4connecting resistance R
eone end, resistance R
eanother termination the second operational amplifier A P
4c
3pin, the second operational amplifier A P
4c
2pin and C
6pin short circuit, the second operational amplifier A P
4c
4pin meets negative supply-V
dC1, the second operational amplifier A P
4c
7pin meets positive supply+V
dC1.The first capacitor C
53be attempted by the output wiring terminal P of constant current source change-over circuit 5
7and P
8between, and connection terminal P
8ground wire GND1.The output wiring terminal P of constant current source change-over circuit 5
7and P
8via the second twin-core Shielded Twisted Pair cable 6, respectively with connection terminal P
9and P
10be connected, sampling resistor R
lbe attempted by connection terminal P
9and P
10between, obtain the current signal I of the on off operating mode that characterizes thyristor pulse power switch assemblies via constant current source change-over circuit 5
t, this current signal I
tflow through sampling resistor, thereby obtain the voltage signal VL(VL=IT × RL of the on off operating mode that characterizes thyristor pulse power switch assembly).Wherein, this signal is divided into two transmission paths, wherein a road is transferred to data acquisition unit 12, obtained the analog quantity of the on off operating mode that characterizes thyristor pulse power switch assembly by data acquisition unit 12 Real-time Collections, an other road is transferred to continuation in shaping and comparator circuit 7 and processes the low and high level signal that obtains the on off operating mode that characterizes thyristor pulse power switch assembly, i.e. switching value signal.
In one embodiment of the invention, constant current source change-over circuit 5 can also adopt difference amplifier chip.The difference amplifier chip that for example model is INA105.
Fig. 5 is the schematic diagram of constant current source change-over circuit 5 in accordance with another embodiment of the present invention.
Constant current source change-over circuit 5 comprises: difference amplifier chip, follower and the second operational amplifier.Wherein, second of difference amplifier chip is connected with the output port of pre-process circuit 4 with three-prong.The input end of follower is connected with the output terminal of difference amplifier chip.The electrode input end of the second operational amplifier is connected with the output terminal of follower by resistance, negative input and output terminal short circuit, and output terminal is connected to the first pin of difference amplifier chip, between the electrode input end of the second operational amplifier and signal ground, be parallel with the first electric capacity, and the input end of the second twin-core shielding twisted wire described in two terminations of the first electric capacity, the output termination sampling resistor of the second twin-core shielding twisted wire.The two ends of sampling resistor are connected with the output terminal of the second twin-core shielding twisted wire 6 respectively, for receiving the current signal of the second twin-core shielding twisted wire 6, and generate terminal voltage signal at the two ends of sampling resistor 6.
As shown in Figure 5, the connection terminal P of constant current source change-over circuit 5
5meet difference amplifier chip AP
2the second pin A
2pin, the connection terminal P of constant current source change-over circuit 5
6meet difference amplifier chip AP
2three-prong A
3pin, difference amplifier chip AP
2the 5th pin A
5pin and the 6th pin A
6pin short circuit, difference amplifier chip AP
2the 4th pin A
4pin meets negative supply-V
dC1, difference amplifier chip AP
2the 7th pin A
7pin meets positive supply+V
dC1.Difference amplifier chip AP
2a
1pin meets the second operational amplifier A P
4output pin C
6, capacitor C
51a termination negative supply-V
dC1, capacitor C
51other end ground wire GND1, follower AP
3input pin B
2meet difference amplifier chip AP
2output pin A
6, follower AP
3b
5pin meets positive supply+V
dC1, follower AP
3b
3pin meets negative supply-V
dC1, follower AP
3output pin B
4connecting resistance R
eone end, resistance R
eanother termination amplifier AP
4c
3pin, the second operational amplifier A P
4c
2pin and C
6pin short circuit, the second operational amplifier A P
4c
4pin meets negative supply-V
dC1, the second operational amplifier A P
4c
7pin meets positive supply+V
dC1.The first capacitor C
53be attempted by the output wiring terminal P of constant current source change-over circuit 5
7and P
8between, and connection terminal P
8ground wire GND1, the output wiring terminal P of constant current source change-over circuit 5
7and P
8via the second twin-core Shielded Twisted Pair cable 6, respectively with connection terminal P
9and P
10be connected.Sampling resistor R
lbe attempted by connection terminal P
9and P
10between, obtain the anti-current signal I of the on off operating mode of sign thyristor pulse power switch assembly via constant current source change-over circuit 5
t, current signal I
tflow through sampling resistor, thereby obtain the voltage signal V of the on off operating mode that characterizes thyristor pulse power switch assembly
l(V
l=I
t× R
l), this signal is divided into two transmission paths, wherein a road is transferred to data acquisition unit 12, obtained the analog quantity of the on off operating mode that characterizes thyristor pulse power switch assembly by data acquisition unit 12 Real-time Collections, an other road is transferred to continuation in shaping and comparator circuit 7 and processes the low and high level signal that obtains the on off operating mode that characterizes thyristor pulse power switch assembly, i.e. switching value signal.
In an example of the present invention, the first and second operational amplifiers can be selected single channel operational amplifier or two-way operational amplifier, for example, and the single channel operational amplifier that model is OP07, or the model two-way operational amplifier that is OP284.
In another example of the present invention, follower AP
3: can select BUF634 when electric current less (as being no more than 250mA), when electric current can be selected power operational amplifier PA01 when large (as exceeding 1A).
Fig. 6 is according to the schematic diagram of the shaping of the embodiment of the present invention and comparator circuit.
Shaping is connected with the input end of comparator circuit 7 and the two ends of sampling resistor, for receiving sampling resistor R
lterminal voltage signal V
l, and according to sampling resistor R
lterminal voltage signal obtain the low and high level signal of the on off operating mode that characterizes thyristor pulse power switch assembly.
Shaping and comparator circuit comprise: diode, the first comparer and the second comparer.Wherein, diode anode is connected with one end of sampling resistor by resistance, and negative electrode is connected with electrochemical capacitor is anodal, the minus earth of electrochemical capacitor, electrochemical capacitor and the second Capacitance parallel connection.The electrode input end of the first comparer is connected with the electrode input end of electrochemical capacitor by resistance, and the electrode input end of the first comparer is further connected with the output terminal of the first comparer by resistance.The negative input of the second comparer is connected with the positive terminal of electrochemical capacitor by resistance, the electrode input end of the second comparer is connected with the output terminal of the second comparer by resistance, the first comparer is connected with the output terminal of the second comparer, and output characterizes the low and high level signal of the on off operating mode of thyristor pulse power switch assembly.
As shown in Figure 6, the connection terminal P of shaping and comparator circuit 7
9and P
10via the second twin-core Shielded Twisted Pair cable 6, respectively with the output wiring terminal P of constant current source change-over circuit 5
7and P
8be connected, sampling resistor R
lbe attempted by connection terminal P
9and P
10between, connection terminal P
10gND1 is connected with ground wire, connection terminal P
9with resistance R
71one end be connected, resistance R
71the other end and diode D
71anode be connected, diode D
71negative electrode and resistance R
72one end be connected, resistance R
72the other end and electrochemical capacitor C
72positive pole be connected, electrochemical capacitor C
72positive pole and the second capacitor C
71one end short circuit, electrochemical capacitor C
72negative pole and the second capacitor C
71other end short circuit and be connected with ground wire GND1, resistance R
74a termination electrochemical capacitor C
72positive pole, resistance R
74another termination the first comparer AP
5electrode input end A
3pin, resistance R
75a termination electrochemical capacitor C
72positive pole, resistance R
75another termination the second comparer AP
6negative input A
6pin, resistance R
76one end ground wire GND1, resistance R
76another termination the first comparer AP
6a
5pin, resistance R
77a termination second comparer AP
6electrode input end A
5pin, resistance R
77another termination the second comparer AP
6output terminals A
7pin, resistance R
78a termination first comparer AP
5electrode input end A
3pin, resistance R
78another termination the first comparer AP
5output terminals A
1pin, resistance R
79a termination first comparer AP
5output terminals A
1pin, resistance R
79another termination positive supply+V
dC1, the first comparer AP
5a
8pin meets positive supply+V
dC1, the second comparer AP
6a
4pin meets negative supply-V
dC1, the first comparer AP
5output terminals A
1pin and output wiring terminal P
11be connected, the second comparer AP
6output terminals A
7pin and output wiring terminal P
12be connected, via shaping and comparator circuit 7, obtain the low and high level signal V of the on off operating mode that characterizes thyristor pulse power switch assembly
zT1.
In an example of the present invention China, the first and second comparers can be selected single channel comparer or two-way comparer, the two-way comparer that the single channel comparer that for example model is LM331 or model are LM393.
The input end of data acquisition unit 12 and sampling resistor R
ltwo ends be connected, for receiving sampling resistor R
lterminal voltage signal obtain the analog quantity of the on off operating mode of thyristor pulse power switch assembly with Real-time Collection.
In one embodiment of the invention, the commercial Acquisition Circuit card DI-710 series of products that data acquisition unit 12 can adopt DATAQ instrument to produce, it has independently 16 data acquisition channels, also can adopt high-grade single-chip microcomputer or dsp chip to build capture card.At this, pardon this patent and repeat no more.
Fig. 7 is according to the schematic diagram of the electro-optical conversion circuit of the embodiment of the present invention.
The input end of electro-optical conversion circuit 8 is connected with the output terminal of comparator circuit 7 with shaping, for being converted to light pulse signal from the level signal of shaping and comparator circuit 7.
Electro-optical conversion circuit comprises: with gate drive circuit with send optical fiber head, wherein, connect low and high level signal, the second pin and the first pin short circuit of the on off operating mode that characterizes thyristor pulse power switch assembly with the first pin of gate drive circuit.Send optical fiber head and be connected with the three-prong of gate drive circuit, low and high level signal is converted to light signal, and is sent to photoelectric switching circuit 10 by optical cable.In one embodiment of the invention, optical cable is single core single-mode fiber or single core multimode optical fiber.
As shown in Figure 7, the connection terminal P of electro-optical conversion circuit 8
11connect and gate drive circuit AP
7b
1pin, the connection terminal P of electro-optical conversion circuit 8
12connect and gate drive circuit AP
7b
4pin, with gate drive circuit AP
7the first pin B
1pin and the second pin B
2pin short circuit, with gate drive circuit AP
7b
4pin ground wire GND1, with gate drive circuit AP
7b
8pin meets positive supply+V
dC2, with gate drive circuit AP
7b
6pin and B
7pin short circuit and being connected with ground wire GND1, with gate drive circuit AP
7three-prong B
3pin receives and sends optical fiber head OP
1a
6pin, sends optical fiber head OP
1a
6pin respectively with A
2pin and A
7pin short circuit, capacitor C
82one end receive and send optical fiber head OP
1a
7pin, capacitor C
82other end ground wire GND1, capacitor C
81a termination positive supply+V
dC2, capacitor C
81other end ground wire GND1, resistance R
81one end receive and send optical fiber head OP
1a
2pin, resistance R
81another termination positive supply+V
dC2, therefore, via electro-optical conversion circuit 8, by the low and high level signal V of the on off operating mode of sign thyristor pulse power switch assembly
zT1be converted to light signal, transfer to photoelectric switching circuit 10 via optical cable 9.
In an example of the present invention, with the model of gate drive circuit be SN75451, sending the model of optical fiber head is HFBR-1412T.
Fig. 8 is according to the schematic diagram of the photoelectric switching circuit of the embodiment of the present invention.
The input end of photoelectric switching circuit 10 is connected with the output terminal of electro-optical conversion circuit 8 by optical cable 9, for light pulse signal conversion process being obtained to the voltage signal of the on off operating mode for characterizing thyristor pulse power switch assembly.
Photoelectric switching circuit comprises: receive optical fiber head, wherein receive optical fiber head and be connected with optical cable 9, for receiving optical signals, and this light signal is converted to the voltage signal of the on off operating mode of corresponding sign thyristor pulse power switch assembly.
As shown in Figure 8, photoelectric switching circuit 10 receives the low and high level signal V of the on off operating mode of the sign thyristor pulse power switch assembly from electro-optical conversion circuit 8 via optical cable 9
zT1, receive optical fiber head OP
2a
2pin meets positive supply+V
dC3, receive optical fiber head OP
2a
3pin and A
7pin short circuit and being connected with ground wire GND2, receives optical fiber head OP
2a
2pin meets positive supply+V
dC3, receive optical fiber head OP
2a
6pin connecting resistance R
101one end, resistance R
101another termination positive supply+V
dC3, capacitor C
101one end with receive optical fiber head OP
2a
6pin is connected, capacitor C
101other end ground wire GND2, capacitor C
102a termination positive supply+V
dC3, capacitor C
102other end ground wire GND2, output wiring terminal P
13meet the A of photoelectric switching circuit 10
6pin, output wiring terminal P
14ground wire GND2.Therefore, the low and high level signal V of on off operating mode of thyristor pulse power switch assembly will be characterized via photoelectric switching circuit 10
zT2be converted to electric signal, and electric signal is passed to control module 11, control module 11, according to obtained result (whether having digital quantity), finally obtains the on off operating mode of thyristor assembly operation, and provides steering order for participating in blocking the important operations such as thyristor assembly driving pulse.
In an example of the present invention, the model that receives optical fiber head is HFBR-2412T.
Control module 11 is connected with the output terminal of photoelectric switching circuit 10, for according to the on off operating mode that detects thyristor pulse power switch assembly for characterizing the voltage signal of on off operating mode of thyristor pulse power switch assembly receiving.
In one embodiment of the invention, control module 11 can be host computer or correlation control unit 11, depending on concrete application scenario, can adopt computing machine, high-grade single-chip microcomputer or dsp chip, DSP+FPGA chip or industrial computer.
To sum up, the workflow of the proving installation that obtains the component open-closed state of thyristor pulse power switch of the present invention is as follows:
Because terminal resistance RT is serially connected in the secondary side of High-Voltage Insulation type current sensor 2, it belongs to low pressure end, both can be used as the output terminal of sensor, can be used as again the input end of pre-process circuit 4, via the first twin-core Shielded Twisted Pair cable 3, by the terminal resistance R of the on off operating mode of sign thyristor pulse power switch assembly
tterminal voltage signal V
t, be transferred to pre-process circuit 4.By pre-process circuit 4 to this terminal voltage signal V
tcarry out, after rough handling, being transferred to constant current source change-over circuit 5, then will characterize the voltage signal V of on off operating mode of thyristor pulse power switch assembly by constant current source change-over circuit 5
tbe converted to current signal I
t, be transferred to sampling resistor R via the second twin-core Shielded Twisted Pair cable 6
l, the terminal voltage V obtaining
l(V
l=I
t× R
l), be divided into two transmission paths.Wherein a road is transferred to data acquisition unit 12, is obtained the analog quantity V of the on off operating mode that characterizes thyristor pulse power switch assembly by data acquisition unit 12 Real-time Collections
l, another road is transferred to shaping and comparator circuit 7, obtain the low and high level signal of the on off operating mode that characterizes thyristor pulse power switch assembly, again this level signal is processed and obtained light pulse signal through electro-optical conversion circuit 8, be transferred to photoelectric switching circuit 10 by optical cable 9, obtained the voltage signal of the on off operating mode that characterizes thyristor pulse power switch assembly by photoelectric switching circuit 10 conversion process, again this voltage signal is transferred to control module 11, whether control module 11 is according to obtained result (having digital quantity), finally obtain the on off operating mode of thyristor assembly operation.
The voltage signal VLIN(of the on off operating mode to sign thyristor pulse power switch assembly is as shown in Figure 5 below) and reference voltage V
r1and V
r2magnitude relationship and the different conditions brief summary of thyristor assembly T1 and T2 as follows:
(1) at V
r1>V
r2time, as the V that satisfies condition
lIN<V
r2time, i.e. comparator circuit output low level, represents thyristor assembly short-circuit condition (conducting all the time of thyristor assembly);
(2) at V
r1>V
r2time, as the V that satisfies condition
lIN>V
r1time, i.e. comparator circuit output low level, represents thyristor assembly open-circuit condition (thyristor assembly disconnects access failure all the time);
(3) at V
r1>V
r2time, as the >V that satisfies condition
r1v
lIN>V
r2time, i.e. comparator circuit output high level, represents thyristor assembly normal condition.
As can be seen here, when characterizing the low and high level signal V of on off operating mode of thyristor pulse power switch assembly
zT2during for low level, represent that thyristor assembly has fault, it can be used as the steering order of blocking electromagnetic irradiating device change-over switch.For further analysis of failure feature and accurately localization of fault, the measured data that can obtain by analysis data acquisition unit 12, and judge that in conjunction with the fault tree of early stage accumulation thyristor assembly is for open circuit or short trouble, and which kind of fault of which thyristor assembly appearance.
Need to remind reference voltage V
r1and V
r2between difference reflected the stagnant loop voltag value (error amount) of comparator circuit, should take into account tested voltage range, also to consider the sensitivity characteristics of comparer.Therefore, the present invention advises V
r1and V
r2difference be between 0.1V-0.2V.
According to the proving installation that obtains the component open-closed state of thyristor pulse power switch of the embodiment of the present invention, current sensing head adopts insulated type structure, by current sensing head heeling-in having in the sheath of High-Voltage Insulation ability, utilize constant current source transmission to characterize the voltage signal of the on off operating mode of thyristor pulse power switch assembly, can detect easily the open fault of thyristor assembly operation or the voltage signal of short trouble, and this voltage signal is converted to current signal, can be used for long-distance transmissions, can also status information be uploaded to relevant host computer or correlation control unit in real time via optical cable, provide steering order for participating in blocking the important operations such as thyristor assembly driving pulse, solve the technical barrier that works in the remote state-detection of thyristor pulse power switch assembly under strong electromagnetic environment, guarantee that pulse power switch assembly can be healthy, safety, reliability service.
The proving installation that obtains the component open-closed state of thyristor pulse power switch of the embodiment of the present invention at least comprises following beneficial effect:
(1) this proving installation for current sensor has designed high voltage bearing insulating sheath structure, solved the High-Voltage Insulation problem of thyristor assembly state detection sensor in electromagnetic launch system.
(2) characteristic quantity that this proving installation extracts comes from the out secondary of High-Voltage Insulation type sensor, because it is low pressure end, thereby greatly reduces the insulating requirements of circuit, has simplified the version of circuit.
(3) voltage signal of thyristor assembly running status is converted to current signal by this proving installation, both realized long-distance transmissions status signal, can also adapt to the special electromagnetic environment of electromagnetic launch system.
(4) this proving installation both can have been exported digital quantity, can also transmit analog quantity, and quantity of information is abundant, had strengthened the adaptive faculty of proving installation.
(5) this proving installation adopts modular design, is easy to expansion, convenient operation.
The proving installation that obtains the component open-closed state of thyristor pulse power switch of the embodiment of the present invention can promote the use of in the proving installation that comprises thyristor, IGBT, field effect transistor, IGCT pipe large-capacity power electronics converting means on off operating mode.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And specific features, structure, material or the feature of description can be with suitable mode combination in any one or more embodiment or example.
Although illustrated and described embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art can change above-described embodiment within the scope of the invention in the situation that not departing from principle of the present invention and aim, amendment, replacement and modification.Scope of the present invention is extremely equal to and limits by claims.
Claims (9)
1. a proving installation that obtains the component open-closed state of thyristor pulse power switch, is characterized in that, comprising:
Current sensor, described current sensor is sheathed in the resistance-capacitance absorption loop of thyristor assembly, and the secondary wiring terminals of described current sensor is connected to respectively the two ends of terminal resistance;
Pre-process circuit, the input end of described pre-process circuit is connected with the secondary wiring terminals of described current sensor by the first twin-core Shielded Twisted Pair cable, described pre-process circuit is for receiving the terminal voltage signal of described terminal resistance and described terminal voltage signal being carried out to pre-service, wherein, the terminal voltage signal of described terminal resistance is for characterizing the on off operating mode of thyristor pulse power switch assembly;
Constant current source change-over circuit, the input end of described constant current source change-over circuit is connected with the output terminal of described pre-process circuit, and the output terminal of described constant current source change-over circuit is connected with the input end of the second twin-core shielding twisted wire cable, described constant current source change-over circuit is used for the terminal voltage signal of the terminal resistance that receives the on off operating mode for representing thyristor pulse power switch assembly, and described terminal voltage signal is converted to current signal, and described current signal transfer to described the second twin-core is shielded to twisted wire cable;
Sampling resistor, the two ends of described sampling resistor are connected with the output terminal of described the second twin-core shielding twisted wire respectively, for receiving the current signal of described the second twin-core shielding twisted wire, and generate terminal voltage signal at the two ends of described sampling resistor;
Shaping and comparator circuit, described shaping is connected with the input end of comparator circuit and the two ends of described sampling resistor, for receiving the terminal voltage signal of described sampling resistor, and obtain the low and high level signal of the on off operating mode that characterizes thyristor pulse power switch assembly according to the terminal voltage signal of described sampling resistor;
Data acquisition unit, the input end of described data acquisition unit is connected with the two ends of described sampling resistor, obtains the analog quantity of the on off operating mode of thyristor pulse power switch assembly for receiving the terminal voltage signal of described sampling resistor with Real-time Collection;
Electro-optical conversion circuit, the input end of described electro-optical conversion circuit is connected with the output terminal of comparator circuit with described shaping, for being converted to light pulse signal from the level signal of described shaping and comparator circuit;
Photoelectric switching circuit, the input end of described photoelectric switching circuit is connected with the output terminal of described electro-optical conversion circuit by optical cable, for described light pulse signal conversion process being obtained to the voltage signal of the on off operating mode for characterizing thyristor pulse power switch assembly;
Control module, described control module is connected with the output terminal of described photoelectric switching circuit, for according to the on off operating mode that detects thyristor pulse power switch assembly for characterizing the voltage signal of on off operating mode of thyristor pulse power switch assembly receiving.
2. the proving installation that obtains the component open-closed state of thyristor pulse power switch as claimed in claim 1, is characterized in that, described current sensor is High-Voltage Insulation type current sensor, and wherein, described current sensor comprises:
Current sensor coil;
Shield overcoat, be positioned at the skin of described current sensor coil, the input terminal of described current sensor and outlet terminal are drawn by described the first twin-core Shielded Twisted Pair;
Insulating coating, described insulating coating is positioned at the skin of described shielding overcoat, and fills with and have fluid sealant in described insulating coating.
3. the proving installation that obtains the component open-closed state of thyristor pulse power switch as claimed in claim 1, is characterized in that, described pre-process circuit comprises:
Instrument operational amplifier, described instrument is with being parallel with the first resistance between the first pin of operational amplifier and the 8th pin, the second pin is connected with one end of the second resistance, the other end of described the second resistance is connected with one end of described terminal resistance, three-prong is connected with one end of the 3rd resistance, described the 3rd other end of resistance and the other end of described terminal resistance are connected, the 4th pin connects negative supply, the 5th pin ground connection, the 6th pin is connected with one end of the 4th resistance, another termination output port of described the 4th resistance, the 7th pin connects positive supply.
4. the proving installation that obtains the component open-closed state of thyristor pulse power switch as claimed in claim 1, is characterized in that, described constant current source change-over circuit comprises:
The first operational amplifier, the electrode input end of described the first operational amplifier is connected with one end of the 5th resistance, described the 5th other end of resistance and the output port of described pre-process circuit are connected, the negative input of described the first operational amplifier is connected with one end of the 6th resistance, and described the 6th other end of resistance and the output port of described pre-process circuit are connected;
Follower, the input end of described follower is connected with the output terminal of described the first operational amplifier;
The second operational amplifier, the electrode input end of described the second operational amplifier is connected with the output terminal of described follower by resistance, negative input and output terminal short circuit, and output terminal is connected to the electrode input end of described the first operational amplifier, between the electrode input end of described the second operational amplifier and signal ground, be parallel with the first electric capacity, and the input end of the second twin-core shielding twisted wire described in two terminations of the first electric capacity, sampling resistor described in the output termination of described the second twin-core shielding twisted wire.
5. the proving installation that obtains the component open-closed state of thyristor pulse power switch as claimed in claim 4, is characterized in that, described constant current source change-over circuit comprises:
Difference amplifier chip, second of described difference amplifier chip is connected with the output port of described pre-process circuit with three-prong;
Follower, the input end of described follower is connected with the output terminal of described difference amplifier chip;
The second operational amplifier, the electrode input end of described the second operational amplifier is connected with the output terminal of described follower by resistance, negative input and output terminal short circuit, and output terminal is connected to the first pin of described difference amplifier chip, between the electrode input end of described the second operational amplifier and signal ground, be parallel with the first electric capacity, and the input end of the second twin-core shielding twisted wire described in two terminations of the first electric capacity, sampling resistor described in the output termination of described the second twin-core shielding twisted wire.
6. the proving installation that obtains the component open-closed state of thyristor pulse power switch as claimed in claim 1, is characterized in that, described shaping and comparator circuit comprise:
Diode, described diode anode is connected with one end of described sampling resistor by resistance, and negative electrode is connected with electrochemical capacitor is anodal, the minus earth of described electrochemical capacitor, described electrochemical capacitor and the second Capacitance parallel connection;
The first comparer, the electrode input end of described the first comparer is connected with the electrode input end of described electrochemical capacitor by resistance, and the electrode input end of described the first comparer is further connected with the output terminal of the first comparer by resistance;
The second comparer, described the second comparer negative input is connected with the positive terminal of described electrochemical capacitor by resistance, the electrode input end of described the second comparer is connected with the output terminal of described the second comparer by resistance, the first comparer is connected with the output terminal of the second comparer, and output characterizes the low and high level signal of the on off operating mode of thyristor pulse power switch assembly.
7. the proving installation that obtains the component open-closed state of thyristor pulse power switch as claimed in claim 1, is characterized in that, described electro-optical conversion circuit comprises:
With gate drive circuit, described and the first pin gate drive circuit connects the low and high level signal of the on off operating mode that characterizes thyristor pulse power switch assembly, the second pin and the first pin short circuit;
Send optical fiber head, described transmission optical fiber head is connected with the three-prong of gate drive circuit with described, low and high level signal is converted to light signal, and is sent to described photoelectric switching circuit by optical cable.
8. the proving installation that obtains the component open-closed state of thyristor pulse power switch as claimed in claim 1, is characterized in that, described photoelectric switching circuit comprises:
Receive optical fiber head, described reception optical fiber head is connected with described optical cable, for receiving optical signals, and described light signal is converted to the voltage signal of the on off operating mode of corresponding sign thyristor pulse power switch assembly.
9. the proving installation that obtains the component open-closed state of thyristor pulse power switch as claimed in claim 1, is characterized in that, described optical cable is single core single-mode fiber or single core multimode optical fiber.
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| CN109541373A (en) * | 2018-11-27 | 2019-03-29 | 彭雪海 | A kind of quick twisted pair wire on off test instrument |
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| Publication number | Publication date |
|---|---|
| CN103941181B (en) | 2017-01-18 |
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