CN106655135A - CAN bus lightning protection device capable of automatically detecting lightning stroke number - Google Patents
CAN bus lightning protection device capable of automatically detecting lightning stroke number Download PDFInfo
- Publication number
- CN106655135A CN106655135A CN201611011279.9A CN201611011279A CN106655135A CN 106655135 A CN106655135 A CN 106655135A CN 201611011279 A CN201611011279 A CN 201611011279A CN 106655135 A CN106655135 A CN 106655135A
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- China
- Prior art keywords
- absorbing element
- surge absorbing
- lightning
- resistance
- canh
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/17—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values giving an indication of the number of times this occurs, i.e. multi-channel analysers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to the technical field of electrical equipment lightning protection, and particularly provides a CAN bus lightning protection device capable of automatically detecting the lightning stroke number. The CAN bus lightning protection device comprises a CAN interface chip. The chip is provided with a CANH end and a CANL end. A CANH end lightning stroke number detection circuit, a signal lightning protection circuit and a CANL end lightning stroke number detection circuit are connected in series between the CANH end and CANL end in turn. The first OUT-A end of the CANH end lightning stroke number detection circuit is connected with the first input end of a single-chip microcomputer. The second OUT-A end of the CANL end lightning stroke number detection circuit is connected with the second input end of the single-chip microcomputer. The CAN bus lightning protection device is scientific and reasonable in design and safe and reliable, lightning protection is performed on a signal transmission circuit, and the number of the lightning strokes of each port of the signal transmission circuit can also be automatically detected so that the basis of lightning protection design can be provided for engineering designers.
Description
Technical field
The present invention relates to lightningproof technical field, specially a kind of CAN of energy automatic detection number of lightning strokes
Bus lightning protection device.
Background technology
Caused by the induced lightening of namely our the daily theorys of the electromagnetic pulse in thunder and lightning is mainly by electromagnetic induction effect, it is led
Affect electronic equipment and system.Induced lightening is the produced momentary pulse magnetic field when thunder is dodged, this powerful induced field,
Charge inducing, including wired, wireless communication networks, power grid system can be produced in the metalolic network in the range of the 1km of ground
The line systems such as network.The charge inducing of high intensity can form powerful instantaneous pressure electric field in these metalolic networks, so as to shape
In pairs the high pressure arc discharge of electrical equipment, eventually results in electric equipment and burns, and the harm that wherein weak electricity system is subject to is bigger.
The residual voltage that at present lightning protection device on the market pays attention to lightning protection, efficiently releases surge current and reduce line-to-line mostly
Deng conventional shocking preventing technology means, rarer lightning protection device can be detected to the number of times that electrical equipment various pieces are struck by lightning automatically
And statistics, so as to equipment research staff or project planner are always next according to conventional experience when lightning protection device is designed
Design, due to lacking objective, effective data as foundation, so final design lightning-protected product out or lightening protection engineering are always
User is made it difficult for be satisfied with.
The content of the invention
It is an object of the invention to provide a kind of design science is reasonable, make simple, safe and reliable, can be CAN system
There is provided lightning protection while can also automatic detection, count the number of times that its each position is struck by lightning.
The technical solution used in the present invention：
A kind of CAN lightning protection device of energy automatic detection number of lightning strokes, including CAN interface chip, there is a CANH ends on chip
With a CANL ends, it is characterised in that：Also include the CANH ends thunderbolt being connected in turn between the CANH ends and the CANL ends
Number of times detection circuit, signal lighting protection protection circuit and CANL ends number of lightning strokes detection circuit, the detection of CANH ends number of lightning strokes
Circuit, signal lighting protection protection circuit, CANL ends number of lightning strokes detection circuit are sequentially connected in series, CANH ends number of lightning strokes detection electricity
The first OUT-A ends on road connect the first input end of single-chip microcomputer, and CANL ends number of lightning strokes detects the 2nd OUT-A ends of circuit
Connect the second input of the single-chip microcomputer.
Thunder-strike current is leaked into the earth while the residual voltage between circuit to be down to lower, protection CAN by signal lighting protection protection circuit
Bus system, whenever thunder and lightning hits CAN system once, number of lightning strokes detection circuit will transmit a high level signal
To the single-chip microcomputer for being connected, single-chip microcomputer can judge the lightning surge and number of lightning strokes of current appearance, can automatically add up the thunder for occurring
Hit number of times.
Further, number of lightning strokes detection circuit in the CANH ends is inhaled by first resistor R1, second resistance R2, the 5th surge
Receive element D5, the first two-way optocoupler U1 compositions, CANH ends Jing second resistances R2 and described signal lighting protection protection circuit one end
Connection, also successively first resistor R1, the 5th surge absorbing element D5 described in Jing and signal lighting protection protection are electric at the CANH ends
Road one end connects, and the two ends of the 5th surge absorbing element D5 simultaneously connect the input group of the described first two-way optocoupler U1, wherein
The anode input of the first two-way optocoupler U1 is connected with the common port of first resistor R1, the 5th surge absorbing element D5, institute
The negative electrode input for stating the first two-way optocoupler U1 is connected with described signal lighting protection protection circuit one end, the first two-way optocoupler U1
The negative electrode input also electric capacity C3 of Jing the 3rd ground connection.
CANH ends number of lightning strokes detection circuit adopt two-way optocoupler U1 be in order to meet thunderbolt polarity for just, ground potential be
When negative and thunderbolt polarity be bear, ground potential for timing number of lightning strokes detection needs, first resistor R1 is to ensure first pair
Do not damaged by surge current to optocoupler U1, the 5th surge absorbing element D5 is to ensure that the first two-way optocoupler U1 does not receive surge
The damage of voltage, when thunder and lightning hits CANH ends, detection circuit will externally send a high level signal.
Further, the signal lighting protection protection circuit by the first electric capacity C1, the 5th resistance R5, the 6th resistance R6, second
Surge absorbing element D2, the 3rd surge absorbing element D3, the 4th surge absorbing element D4, the 6th surge absorbing element T1 compositions,
Second resistance R2, the 4th surge absorbing element D4, the first electric capacity C1 have wherein been sequentially connected in series between CANH ends and signal ground GND,
The 4th resistance R4, the 3rd surge absorbing element D3, the first electric capacity C1, CANH have been sequentially connected in series between CANL ends and signal ground GND
End and CANL ends between be sequentially connected in series second resistance R2, the 5th resistance R5, the second surge absorbing element D2, the 6th resistance R6,
4th resistance R4, wherein the 6th surge absorbing element T1 and connecing the two ends of the second surge absorbing element D2.
CANL ends number of lightning strokes detection circuit adopt two-way optocoupler U2 be in order to meet thunderbolt polarity for just, ground potential be
When negative and thunderbolt polarity be bear, ground potential for timing number of lightning strokes detection needs, 3rd resistor R3 is to ensure second pair
Do not damaged by surge current to optocoupler U2, the first surge absorbing element D1 is to ensure that the second two-way optocoupler U2 does not receive surge
The damage of voltage, when thunder and lightning hits CANL ends, detection circuit will externally send a high level signal.
Further, the signal lighting protection protection circuit by the first electric capacity C1, the 5th resistance R5, the 6th resistance R6, second
Surge absorbing element D2, the 3rd surge absorbing element D3, the 4th surge absorbing element D4, the 6th surge absorbing element T1 compositions,
Second resistance R2, the 4th surge absorbing element D4, the first electric capacity C1 have wherein been sequentially connected in series between CANH ends and signal ground GND,
The 4th resistance R4, the 3rd surge absorbing element D3, the first electric capacity C1, CANH have been sequentially connected in series between CANL ends and signal ground GND
End and CANL ends between be sequentially connected in series second resistance R2, the 5th resistance R5, the second surge absorbing element D2, the 6th resistance R6,
4th resistance R4, wherein the 6th surge absorbing element T1 and connecing the two ends of the second surge absorbing element D2.
No matter thunder and lightning hits CANH ends or CANL ends, and signal lighting protection protection circuit all efficiently can leak in lightning surge electric current
Greatly, while the residual voltage between CANH ends and CANL ends to be down to lower, protection CAN system and equipment behind.
Further, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3 are safety electric capacity, and the first surge is inhaled
Receive element D1, the second surge absorbing element D2, the 3rd surge absorbing element D3, the 4th surge absorbing element D4, the 5th surge to inhale
Receive element D5 and be two-way transient voltage suppressor, the 6th surge absorbing element T1 is two-way S.E.T electrostatic Surge suppression
Device.
Because CAN bus circuit has coupling dangerous voltage, it is in the case of now making full use of safety condenser failure disconnected
Line state this feature, it is to avoid signal ground GND and the short circuit of CAN lines and the situation that carries dangerous voltage occurs, while safety electric capacity
Thunder-strike current of releasing is also acted as, strengthened common mode lightning protection effect, protected two-way transient voltage suppressor etc. to act on, and two-way wink
Time variant voltage suppresses the reaction time of diode to be less than two-way S.E.T electrostatic surge suppressor, can reach and quickly lets out surge current
Enter the effect of the earth.
In sum, as a result of such scheme, the present invention has advantages below：
（1）A kind of CAN lightning protection device of energy automatic detection number of lightning strokes, required electronic devices and components are existing product, nothing
Complicated welding is needed to complete by only needing simpler production.
（2）Design science of the present invention is reasonable, safe and reliable, while whole lightning-proof protection can be carried out to CAN bus circuit
Automatically CANH ends to CAN system, CANL ends are detected and are counted, and can be passed through data by the number of times that thunder and lightning hits
Transmit to communication module or alarm module after single-chip microcomputer process, for the timely handling failure of administrative staff foundation is provided.
Description of the drawings
In order to be illustrated more clearly that present example or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing wanted needed for technology description to do simply to introduce, it is clear that drawings in the following description are only some of the present invention
Example, to those skilled in the art, on the premise of creativeness is not paid, can be with according to these accompanying drawings acquisitions
Other accompanying drawings.
A kind of CAN lightning protection device circuit theory diagrams of energy automatic detection number of lightning strokes of Fig. 1.
Specific embodiment
Below in conjunction with the accompanying drawing in present example, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground description, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.Based on this
Embodiment in bright, the every other reality that those of ordinary skill in the art are obtained on the premise of creative work is not made
Example is applied, the scope of protection of the invention is belonged to.
Embodiment 1：
A kind of CAN lightning protection device of energy automatic detection number of lightning strokes, including CAN interface chip, there is a CANH ends on chip
With a CANL ends, it is characterised in that：Also include the CANH ends thunderbolt being connected in turn between the CANH ends and the CANL ends
Number of times detection circuit, signal lighting protection protection circuit and CANL ends number of lightning strokes detection circuit, the detection of CANH ends number of lightning strokes
Circuit, signal lighting protection protection circuit, CANL ends number of lightning strokes detection circuit are sequentially connected in series, CANH ends number of lightning strokes detection electricity
The first OUT-A ends on road connect the first input end of single-chip microcomputer, and CANL ends number of lightning strokes detects the 2nd OUT-A ends of circuit
Connect the second input of the single-chip microcomputer.CANH ends number of lightning strokes detection circuit by first resistor R1, second resistance R2,
5th surge absorbing element D5, the first two-way optocoupler U1 compositions, CANH ends Jing second resistances R2 are protected with the signal lighting protection
Protection circuit one end connects, the CANH ends also first resistor R1, the 5th surge absorbing element D5 and the signal described in Jing successively
Lightning protection circuit one end connects, and the two ends of the 5th surge absorbing element D5 simultaneously connect the input of the described first two-way optocoupler U1
End group, wherein the anode input of the first two-way optocoupler U1 and first resistor R1, the 5th surge absorbing element D5 it is public
End connection, the negative electrode input of the first two-way optocoupler U1 is connected with described signal lighting protection protection circuit one end, and described first
The negative electrode input of the two-way optocoupler U1 also electric capacity C3 of Jing the 3rd are grounded.CANL ends number of lightning strokes detects circuit by 3rd resistor
R3, the 4th resistance R4, the first surge absorbing element D1, the second two-way optocoupler U2 composition, the resistance R4 of CANL ends the 4th with
Signal lighting protection protection circuit one end connection, also successively 3rd resistor R3, the first surge absoption are first described in Jing at the CANL ends
Part D1 is connected with described signal lighting protection protection circuit one end, and the two ends of the first surge absorbing element D1 simultaneously connect described second pair
To the input group of optocoupler U2, wherein the negative electrode input of the second two-way optocoupler U2 is inhaled with 3rd resistor R3, the first surge
Receive the common port connection of element D1, the anode input of the second two-way optocoupler U2 and described signal lighting protection protection circuit one end
Connection, anode input also the second electric capacity of Jing C2 ground connection of the second two-way optocoupler U2.The signal lighting protection protection circuit by
It is first electric capacity C1, the 5th resistance R5, the 6th resistance R6, the second surge absorbing element D2, the 3rd surge absorbing element D3, the 4th unrestrained
Absorber element D4, the 6th surge absorbing element T1 composition is gushed, wherein second has been sequentially connected in series between CANH ends and signal ground GND electric
Resistance R2, the 4th surge absorbing element D4, the first electric capacity C1, be sequentially connected in series between CANL ends and signal ground GND the 4th resistance R4,
3rd surge absorbing element D3, the first electric capacity C1, have been sequentially connected in series second resistance R2, the 5th resistance between CANH ends and CANL ends
R5, the second surge absorbing element D2, the 6th resistance R6, the 4th resistance R4, wherein the 6th surge absorbing element T1 and to connect second unrestrained
Gush the two ends of absorber element D2.The first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3 are safety electric capacity, the first surge
Absorber element D1, the second surge absorbing element D2, the 3rd surge absorbing element D3, the 4th surge absorbing element D4, the 5th surge
Absorber element D5 is two-way transient voltage suppressor, and the 6th surge absorbing element T1 is the suppression of two-way S.E.T electrostatic surge
Device processed.
In the present embodiment, as shown in figure 1, first resistor R1,3rd resistor R3, the 5th resistance R5, the 6th resistance R6
Current-limiting resistance is, second resistance R2 and the 4th resistance R4 are sample resistance.
When without thunderbolt, second resistance R2 is presented on the line high impedance, the internal illumination two of the first two-way optocoupler U1
Pole pipe is not turned on, thus the phototriode inside the first two-way optocoupler U1 does not work, so the OUT- of the first two-way optocoupler U1
A ends are without high level output.When occurring lightning surge electric current on CANH end lines, second resistance R2 place circuit is presented low-resistance
Resist and have electric current to flow through, at this moment the first two-way optocoupler U1 interior light emitting diodes conducting, at this moment two-way optocoupler U1 inside photoelectricity three
Pole pipe works, so as to the OUT-A ends of the first two-way optocoupler U1 export high level.The high level that single-chip microcomputer is exported according to OUT-A ends
Judge the current lightning surge for occurring and number of lightning strokes and can automatically accumulate the number of lightning strokes of generation, due to first resistor R1 and the
Five surge absorbing element D5 optocoupler U1s two-way to first is protected, so the first two-way optocoupler U1 will not be punctured by lightning surge
Damage.Lightning surge electric current flows through second resistance R2 rear portion and can leak into the earth by the 3rd electric capacity C3 Jing signal ground GND, separately
A part can leak into the earth by the 4th surge absorbing element D4 and the first electric capacity C1 Jing signal ground GND, and minority surge current leads to
Cross the 5th resistance R5 the second surge absorbing element D2 of inflow, the 6th surge absorbing element T1 to flow out from the 6th resistance R6, due to electricity
Stream is that the circuit for taking the lead in selecting resistance value little passes through, therefore a last minority lightning surge electric current part passes through the second electric capacity C2
Jing signal ground GND leak into the earth, and another part is leaked into by the 3rd surge absorbing element D3 and the first electric capacity C1 Jing signal ground GND
Greatly.Meanwhile, single-chip microcomputer can provide data note to be connected with the external equipment such as communication module, alarm module for administrative staff
The services such as record, alarm warning.Also it is in the same manner, just to repeat no more here when occurring lightning surge electric current on CANL end lines.
Presently preferred embodiments of the present invention is the foregoing is only and oneself, not to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (5)
1. a kind of CAN lightning protection device of energy automatic detection number of lightning strokes, including CAN interface chip, there is a CANH on chip
End and a CANL ends, it is characterised in that：Also include the CANH ends thunder being connected in turn between the CANH ends and the CANL ends
Hit number of times detection circuit, signal lighting protection protection circuit and CANL ends number of lightning strokes detection circuit, the inspection of CANH ends number of lightning strokes
Slowdown monitoring circuit, signal lighting protection protection circuit, CANL ends number of lightning strokes detection circuit are sequentially connected in series, the detection of CANH ends number of lightning strokes
First OUT-A ends of circuit connect the first input end of single-chip microcomputer, and CANL ends number of lightning strokes detects the 2nd OUT-A of circuit
Second input of the end connection single-chip microcomputer.
2. it is according to claim 1 it is a kind of can automatic detection number of lightning strokes CAN lightning protection device, it is characterised in that：
Number of lightning strokes detection circuit in the CANH ends is by first resistor R1, second resistance R2, the 5th surge absorbing element D5, first two-way
Optocoupler U1 is constituted, and CANH ends Jing second resistances R2 are connected with described signal lighting protection protection circuit one end, and the CANH ends are also
Successively first resistor R1, the 5th surge absorbing element D5 are connected with described signal lighting protection protection circuit one end described in Jing, and described
The two ends of five surge absorbing element D5 simultaneously connect the input group of the described first two-way optocoupler U1, wherein the sun of the first two-way optocoupler U1
Pole input is connected with the common port of first resistor R1, the 5th surge absorbing element D5, the first two-way optocoupler U1's
Negative electrode input is connected with described signal lighting protection protection circuit one end, the negative electrode input also Jing of the first two-way optocoupler U1
Three electric capacity C3 are grounded.
3. it is according to claim 1 it is a kind of can automatic detection number of lightning strokes CAN lightning protection device, it is characterised in that：
Number of lightning strokes detection circuit in the CANL ends is by 3rd resistor R3, the 4th resistance R4, the first surge absorbing element D1, second two-way
Optocoupler U2 is constituted, and the resistance R4 of CANL ends the 4th is connected with the signal lighting protection protection circuit other end, the CANL ends
Also successively 3rd resistor R3, the first surge absorbing element D1 are connected with the signal lighting protection protection circuit other end described in Jing, institute
State the two ends of the first surge absorbing element D1 and connect the input group of the described second two-way optocoupler U2, wherein the second two-way optocoupler U2
Negative electrode input be connected with the common port of 3rd resistor R3, the first surge absorbing element D1, the second two-way optocoupler
The anode input of U2 is connected with the signal lighting protection protection circuit other end, the anode input of the second two-way optocoupler U2
Also the second electric capacity of Jing C2 is grounded.
4. it is according to claim 1 it is a kind of can automatic detection number of lightning strokes CAN lightning protection device, it is characterised in that：
The signal lighting protection protection circuit by the first electric capacity C1, the 5th resistance R5, the 6th resistance R6, the second surge absorbing element D2,
Three surge absorbing element D3, the 4th surge absorbing element D4, wherein the 6th surge absorbing element T1 compositions, CANH ends and signal ground
Be sequentially connected in series second resistance R2, the 4th surge absorbing element D4, the first electric capacity C1 between GND, CANL ends and signal ground GND it
Between be sequentially connected in series the 4th resistance R4, the 3rd surge absorbing element D3, the first electric capacity C1, go here and there successively between CANH ends and CANL ends
Second resistance R2, the 5th resistance R5, the second surge absorbing element D2, the 6th resistance R6, the 4th resistance R4 are connected to, wherein the 6th is unrestrained
Gush absorber element T1 and connect the two ends of the second surge absorbing element D2.
5. it is according to claim 1 it is a kind of can automatic detection number of lightning strokes CAN lightning protection device, it is characterised in that：
The first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3 are safety electric capacity, the first surge absorbing element D1, the second surge
Absorber element D2, the 3rd surge absorbing element D3, the 4th surge absorbing element D4, the 5th surge absorbing element D5 are two-way wink
Time variant voltage suppresses diode, and the 6th surge absorbing element T1 is two-way S.E.T electrostatic surge suppressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611011279.9A CN106655135A (en) | 2016-11-17 | 2016-11-17 | CAN bus lightning protection device capable of automatically detecting lightning stroke number |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611011279.9A CN106655135A (en) | 2016-11-17 | 2016-11-17 | CAN bus lightning protection device capable of automatically detecting lightning stroke number |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106655135A true CN106655135A (en) | 2017-05-10 |
Family
ID=58808017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611011279.9A Pending CN106655135A (en) | 2016-11-17 | 2016-11-17 | CAN bus lightning protection device capable of automatically detecting lightning stroke number |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106655135A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445113A (en) * | 2019-08-27 | 2019-11-12 | 中国工程物理研究院激光聚变研究中心 | A kind of strong electromagnetic pulse integrated protection device with detecting display function |
| CN111487557A (en) * | 2020-03-26 | 2020-08-04 | 深圳市普威技术有限公司 | DS L circuit lightning stroke detection statistical circuit |
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| CN111487557B (en) * | 2020-03-26 | 2022-07-05 | 深圳市普威技术有限公司 | DSL circuit lightning stroke detection statistical circuit |
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Application publication date: 20170510 |