CN202712845U - Surge protection circuit and surge protector - Google Patents
Surge protection circuit and surge protector Download PDFInfo
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- CN202712845U CN202712845U CN 201220129151 CN201220129151U CN202712845U CN 202712845 U CN202712845 U CN 202712845U CN 201220129151 CN201220129151 CN 201220129151 CN 201220129151 U CN201220129151 U CN 201220129151U CN 202712845 U CN202712845 U CN 202712845U
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- discharge protection
- protection circuit
- surge
- circuit
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Abstract
The utility model is suitable to the field of an integrated circuit, and provides a surge protection circuit and a surge protector, wherein the circuit comprises a transient diode, a gas discharge tube and one or more resistors, wherein the gas discharge tube is connected with the one or more resistors in series and then connected with the transient diode in parallel, one end of the transient diode is the input end of the surge protection circuit, and the other end of the transient diode is the output end of the surge protection circuit. The surge protection circuit and the surge protector enable the transient diode to be connected with the gas discharge tube in parallel for discharging, thereby greatly shortening discharging response time and increasing discharging speed and discharging completeness, and the circuit structure is only provided with an access point, thereby reducing insert loss, reducing signal attenuation in the process of transmission, and increasing signal precision.
Description
Technical field
The utility model belongs to field of seismic data acquisition, relates in particular to a kind of surge protecting circuit and surge protector.
Background technology
The seismic network system adopts the instruments such as magnetometer, pendulum clinometer, water pipe instrument, pantograph, gravimeter, atmospherium, cave Wen Yi, limnimeter, underground heat instrument, sseismograph, gas radon instrument to carry out the data-signal collection usually at present; need by surge protection device its external sampled signal passage to be carried out effectively lightning protection, anti-interference protection in the process of collection signal, pulse surge and the transient overvoltage that produces causes damage to instrument and equipment to prevent from being struck by lightning.And, because earthquake data acquisition to the accuracy of semaphore request, consequently must not have any extra impedance decay, to cause distorted signals in the process of signal transmission.
Existing surge protector adopts transient diode (Transient Voltage Suppressor, TVS) or gas discharge tube (Gas discharge tubes, GDT) to carry out surge protection usually.
When adopting separately TVS to carry out surge protection as main discharge; because it is very fast that TVS has the response time; can accomplish 1ns (nanosecond); deboost is also very accurate; but the parasitic capacitance parameter of TVS band itself; thereby affect the effect of system signal transmission, i.e. the insertion loss index of lightning-protected product.
When adopting separately GDT to carry out surge protection as main discharge; because GDT has large vent discharge function; maximum discharge parameter can arrive 50-100kA; but the response time is slow; generally at 100ns (nanosecond); limiting protecting voltage is at more than 3 times of its starting resistor, and this lightning protection component uses separately, and requiring very accurately to high-precision, data reaction, the seismic network system thunder defending is not suitable for.
The utility model content
The purpose of the utility model embodiment is to provide a kind of surge protecting circuit, is intended to solve that existing surge protecting circuit insertion loss is large, the response time is long, is not suitable for the problem of the needs of seismic network system thunder defending.
The utility model embodiment is achieved in that a kind of surge protecting circuit, and described circuit comprises:
One transient state diode, a gas discharge tube and one or more resistance;
Described gas discharge tube is with after one or more described resistance are connected; in parallel with described transient diode again; one end of described transient diode is the input of described surge protecting circuit, and the other end of described transient diode is the output of described surge protecting circuit.
Further, described one or more resistance is specially:
One end of described transient diode is that the input of described surge protecting circuit is connected with an end of described resistance R 1; the other end of described resistance R 1 is connected with an end of described gas discharge tube; the other end of described gas discharge tube is connected with an end of described resistance R 2, and the other end of described transient diode is that the output of described surge protecting circuit is connected with the other end of described resistance R 2.
Another purpose of the utility model embodiment is to provide a kind of surge protector, between the input of described surge protector and the output by many holding wires with is connected a ground wire and is connected, described surge protector also comprises a plurality of first order discharge protection circuits, described first order discharge protection circuit is above-mentioned surge protecting circuit, the input of described first order discharge protection circuit is described surge protecting circuit input, and the output of described first order discharge protection circuit is the output of described surge protecting circuit;
All connect a described first order discharge protection circuit between any two described holding wires;
All be connected a described first order discharge protection circuit between arbitrary described holding wire and the described ground wire;
Described ground wire is connected with the shell of described surge protector.
Further, described surge protector also comprises a plurality of multistage discharge protection circuits, and a plurality of described multistage discharge protection circuits are corresponding in parallel one by one with a plurality of described first order discharge protection circuits respectively, and each described multistage discharge protection circuit is:
A first order discharge protection circuit as claimed in claim 3, the input of described first order discharge protection circuit is the input of described multistage discharge protection circuit, and the output of described first order discharge protection circuit is the output of described multistage discharge protection circuit; Or
A plurality of first order discharge protection circuits as claimed in claim 3; the input of a plurality of described first order discharge protection circuits connects and simultaneously as the input of described multistage discharge protection circuit, and the output of a plurality of described first order discharge protection circuits connects and simultaneously as the output of described multistage discharge protection circuit.
Further, the input of described surge protector and output are the aviation socket interface.
Further, it is characterized in that, the shell of described surge protector is the explosion-proof metal shell of static.
The utility model embodiment is by discharging transient diode is in parallel with gas discharge tube, significantly shortened the discharge response time, improved fully degree of the velocity of discharge and discharge, and this circuit structure only has an access point, reduced insertion loss, reduce the decay of signal in transmission, improve the signal accuracy.
Description of drawings
The exemplary circuit structure chart of a kind of surge protecting circuit that Fig. 1 provides for the utility model one embodiment;
The principle assumption diagram of the surge protector that Fig. 2 provides for the utility model one embodiment;
The principle assumption diagram of the multi-grade surge protection device that Fig. 3 provides for the utility model one embodiment;
The interface structure figure of the surge protector that Fig. 4 provides for the utility model one embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
The utility model embodiment has significantly shortened the discharge response time by discharging transient diode is in parallel with gas discharge tube, has improved fully degree of the velocity of discharge and discharge, and this circuit structure only has an access point, has reduced insertion loss.
Fig. 1 shows the exemplary circuit structure of the surge protecting circuit that the utility model one embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model embodiment.
As the utility model one embodiment, this surge protecting circuit 1 comprises:
One transient state diode (TVS), a gas discharge tube (GDT) and one or more resistance (R1, R2);
GDT is with after one or more resistance are connected, and in parallel with TVS again, the end of this TVS is the input of surge protecting circuit 1, and the other end of TVS is the output of surge protecting circuit 1.
Fig. 1 describes as an example of two resistance example, certainly can increase according to actual needs or reduce the quantity of resistance, when increasing resistance value or increasing resistance quantity, under the constant condition of lightning current, can increase the starting resistor at GDT two ends, directly cause GDT to accelerate to puncture, can shorten GDT start-up time.Can certainly change the order of connecting between resistance and the GDT.
As the utility model one embodiment; the end of transient diode TVS is that the input of surge protecting circuit 1 is connected with an end of resistance R 1; the other end of resistance R 1 is connected with the end of GDT; the other end of GDT is connected with an end of resistance R 2, and the other end of TVS is that the output of surge protecting circuit 1 is connected with the other end of resistance R 2.
In the utility model embodiment, when large electric current occurring, very fast between the response speed of TVS, can reach for 1 nanosecond, therefore at first conducting of TVS, moment discharges, and about 100 nanoseconds, GDT begins response, because the large vent discharge ability that GDT has, in discharge, the parasitic capacitance of TVS is discharged further, to guarantee discharge fully, improved fully degree of the velocity of discharge and discharge.
In the utility model embodiment, because the deboost of TVS is told somebody what one's real intentions are, and the GDT after making it and connecting and resistance are in parallel, therefore the accuracy of deboost can be guaranteed, the requirement of signal transmission level in the earthquake network system can be satisfied, the resistance of adjusting resistance R1, resistance R 2, the decoupling circuit that provides for GDT, TVS secondary discharge, can realize easily that two-stage discharges simultaneously, reach whole circuit response time fast, the requirement that deboost is low.
The utility model embodiment has significantly shortened the discharge response time by discharging transient diode is in parallel with gas discharge tube, has improved fully degree of the velocity of discharge and discharge, and this circuit structure only has an access point, has reduced insertion loss.
Fig. 2 shows the theory structure of the surge protector that the utility model one embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model embodiment.
As the utility model one embodiment, between the input of this surge protector 2 and the output by many holding wires (S1-S3) with is connected a ground wire (GND) and is connected, this surge protector 2 also comprises a plurality of first order discharge protection circuits (SPD1-SPD6);
These a plurality of first order discharge protection circuits (SPD1-SPD6) all can adopt the described surge protecting circuit 1 of above-described embodiment, the input of first order discharge protection circuit is surge protecting circuit 1 input, and the output of first order discharge protection circuit is the output of surge protecting circuit 1;
All connect a first order discharge protection circuit between any two holding wires;
In the utility model embodiment; be connected first order discharge protection circuit SPD1 between holding wire S1 and the holding wire S2; be connected first order discharge protection circuit SPD2 between holding wire S2 and the holding wire S3, be connected first order discharge protection circuit SPD6 between holding wire S1 and the holding wire S3.
All be connected a first order discharge protection circuit between arbitrary holding wire and the ground wire GND;
In the utility model embodiment, holding wire S1, holding wire S2, holding wire S3 are connected first order discharge protection circuit SPD3, SPD5, SPD4 respectively with between the ground wire GND.
This ground wire is connected with the shell of surge protector 2.
In the utility model embodiment; when instantaneous large-current occurring in arbitrary holding wire; large electric current I 2 for example appears among the holding wire S2; first order discharge protection circuit SPD5 vertically releases rapidly; simultaneously first order discharge protection circuit SPD1 and first order discharge protection circuit SPD2 laterally release electric current to rapidly on holding wire S1 and the holding wire S3, and by first order discharge protection circuit SPD3 and the first order discharge protection circuit SPD4 ground of releasing.
The utility model embodiment adopts and comprises that the surge protecting circuit of TVS and GDT structure is as first order discharge protection circuit; shortened the discharge response time; improved fully degree of discharge; and adopt laterally, vertically release simultaneously; further significantly improved the velocity of discharge; realize disposable lightning wave being suppressed to below the safe voltage, ensured Security of the system.
As the utility model one embodiment; this surge protector 2 can also comprise a plurality of multistage discharge protection circuits (SPD11-SPD16); a plurality of multistage discharge protection circuits (SPD11-SPD16) are corresponding in parallel one by one with a plurality of first order discharge protection circuits (SPD1-SPD6) respectively, and each multistage discharge protection circuit is:
The first order discharge protection circuit (being surge protecting circuit 1) that above-described embodiment provides, the input of this first order discharge protection circuit is the input of multistage discharge protection circuit, and the output of first order discharge protection circuit is the output of multistage discharge protection circuit; Or
The first order discharge protection circuit that a plurality of above-described embodiments provide (being surge protecting circuit 1); the input of a plurality of these first order discharge protection circuits connects and simultaneously as the input of multistage discharge protection circuit, and the output of a plurality of first order discharge protection circuits connects and simultaneously as the output of multistage discharge protection circuit.
Below in conjunction with specific embodiment realization of the present utility model is elaborated.
In the utility model embodiment; have six multistage discharge protection circuits (SPD11-SPD16) with this surge protector 2; and each multistage discharge protection circuit comprises that two surge protecting circuits 1 describe for example; referring to Fig. 3; in multistage discharge protection circuit SPD11; two surge protecting circuits 1 are in parallel with first order discharge protection circuit SPD1, can release to improve the velocity of discharge to surge simultaneously by three branch roads when surge occurring, guarantee system security.
Multistage discharge protection circuit SPD12-SPD16 to act on multistage discharge protection circuit SPD11 identical; after increasing multistage discharge protection circuit, can carry out simultaneously by a plurality of surge protecting circuits 1 discharge of horizontal and vertical structure to holding wire; realization is to fully discharge and the shunting of lightning current; further improved the velocity of discharge; improve protective, avoided surge to the destruction of system.
In the utility model embodiment; first order discharge protection circuit and multistage discharge protection circuit concentrated be connected on the pcb board; realize integrated design; when actual installation; only has an access point; so that this surge protector 2 itself no longer increases access point to the circuit that signal transmits, realize easily line-ground, line-line vertically and laterally full guard measure, and signal attenuation is little.
As the utility model one embodiment, input 21 and the output 22 of this surge protector 2 all can adopt the aviation socket interface, as shown in Figure 4, to reduce volume, are convenient to install.
The utility model embodiment is take the aviation socket of 19 cores as example, wherein the functional definition of pin interface such as following table:
| Pin numbering | I/O lead-in |
| 1 | Signal ground |
| 2 | Vertically (UD) divides to output negative terminal (-) |
| 3 | Thing (EW) divides to calibration coil negative terminal (-) |
| 4 | Power supply negative terminal (-) |
| 5 | Bei Nan (NS) minute to calibration coil negative terminal (-) |
| 6 | Vertically (UD) divides to calibration coil anode (+) |
| 7 | Shielding ground (shell picks) |
| 8 | Vertically (UD) divides to calibration coil negative terminal (-) |
| 9 | Bei Nan (NS) minute to calibration coil anode (+) |
| 10 | Power supply anode (+) |
| 11 | Thing (EW) divides to calibration coil anode (+) |
| 12 | Vertically (UD) divides to output plus terminal (+) |
| 13 | Thing (EW) divides to output negative terminal (-) |
| 14 | The output to zero point in Bei Nan (NS) minute/count and adopt control signal CMD input |
| 15 | Bei Nan (NS) minute to output negative terminal (-) |
| 16 | Bei Nan (NS) minute to output plus terminal (+) |
| 17 | Thing (EW) minute output to zero point/count and adopt control |
| 18 | Thing (EW) divides to output plus terminal (+) |
| 19 | Vertically (UD) minute output to zero point/count and adopt control signal WST input |
Pin 1-19 is the multistage discharge by horizontal and vertical structure of the sampled data that receives, having guaranteed effectively on the basis of lightning protection to have reduced the probability of decay only by an interface, guaranteed the accuracy that signal transmits.
As the utility model one preferred embodiment; the shell of this surge protector 2 can adopt the explosion-proof metal shell of static; can prevent that surge protector is struck by lightning when affecting more than suffering maximum magnitude; block the fragment that hits after the fragmentation of internal discharge element, prevent from hitting personnel, the annex instrument that fragment causes and physical damage occurs.
The utility model embodiment discharges by the surge protecting circuit with transient diode and gas discharge tube parallel-connection structure, significantly shortened the discharge response time, improved fully degree of the velocity of discharge and discharge, and deboost is low, accurate, does not affect the system signal transmission quality; And this surge protector is concentrated first order discharge protection circuit and multistage discharge protection circuit and is connected on the pcb board, realize integrated design, when actual installation, only has an access point, realize easily line-ground, line-line vertically with laterally full guard measure, when having reduced insertion loss, be convenient to the design and installation that lightening protection engineering is used; In addition; this surge protector adopts the aviation socket interface of 19 core holding wires; small product size is little, easy for installation; in rack or be affiliated at wall and all can install; adopt the explosion-proof metal shell technique of static; Special grounding wire is provided, carries out simultaneously existing line-ground, line-line vertically and horizontal full guard, improve protective value.
Below only be preferred embodiment of the present utility model, not in order to limiting the utility model, all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (6)
1. a surge protecting circuit is characterized in that, described circuit comprises:
One transient state diode, a gas gas discharge tube and one or more resistance;
Described gas discharge tube is with after one or more described resistance are connected; in parallel with described transient diode again; one end of described transient diode is the input of described surge protecting circuit, and the other end of described transient diode is the output of described surge protecting circuit.
2. surge protecting circuit as claimed in claim 1 is characterized in that, described one or more resistance are specially:
Resistance R 1 and resistance R 2;
One end of described transient diode is that the input of described surge protecting circuit is connected with an end of described resistance R 1; the other end of described resistance R 1 is connected with an end of described gas discharge tube; the other end of described gas discharge tube is connected with an end of described resistance R 2, and the other end of described transient diode is that the output of described surge protecting circuit is connected with the other end of described resistance R 2.
3. surge protector, it is characterized in that, between the input of described surge protector and the output by many holding wires with is connected a ground wire and is connected, described surge protector also comprises a plurality of first order discharge protection circuits, described first order discharge protection circuit is surge protecting circuit as claimed in claim 1 or 2, the input of described first order discharge protection circuit is described surge protecting circuit input, and the output of described first order discharge protection circuit is the output of described surge protecting circuit;
All connect a described first order discharge protection circuit between any two described holding wires;
All be connected a described first order discharge protection circuit between arbitrary described holding wire and the described ground wire;
Described ground wire is connected with the shell of described surge protector.
4. surge protector as claimed in claim 3; it is characterized in that; described surge protector also comprises a plurality of multistage discharge protection circuits, and a plurality of described multistage discharge protection circuits are corresponding in parallel one by one with a plurality of described first order discharge protection circuits respectively, and each described multistage discharge protection circuit is:
A first order discharge protection circuit as claimed in claim 3, the input of described first order discharge protection circuit is the input of described multistage discharge protection circuit, and the output of described first order discharge protection circuit is the output of described multistage discharge protection circuit; Or
A plurality of first order discharge protection circuits as claimed in claim 3; the input of a plurality of described first order discharge protection circuits connects and simultaneously as the input of described multistage discharge protection circuit, and the output of a plurality of described first order discharge protection circuits connects and simultaneously as the output of described multistage discharge protection circuit.
5. surge protector as claimed in claim 3 is characterized in that, the input of described surge protector and output are the aviation socket interface.
6. surge protector as claimed in claim 3 is characterized in that, the shell of described surge protector is the explosion-proof metal shell of static.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220129151 CN202712845U (en) | 2012-03-30 | 2012-03-30 | Surge protection circuit and surge protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220129151 CN202712845U (en) | 2012-03-30 | 2012-03-30 | Surge protection circuit and surge protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202712845U true CN202712845U (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220129151 Expired - Fee Related CN202712845U (en) | 2012-03-30 | 2012-03-30 | Surge protection circuit and surge protector |
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| Country | Link |
|---|---|
| CN (1) | CN202712845U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103368163A (en) * | 2012-03-30 | 2013-10-23 | 深圳市威尔利实业有限公司 | A surge protection circuit and a surge protector |
-
2012
- 2012-03-30 CN CN 201220129151 patent/CN202712845U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103368163A (en) * | 2012-03-30 | 2013-10-23 | 深圳市威尔利实业有限公司 | A surge protection circuit and a surge protector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20190330 |
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| CF01 | Termination of patent right due to non-payment of annual fee |