CN107482605A - A kind of anti-over-pressed K line communication devices - Google Patents
A kind of anti-over-pressed K line communication devices Download PDFInfo
- Publication number
- CN107482605A CN107482605A CN201710918481.8A CN201710918481A CN107482605A CN 107482605 A CN107482605 A CN 107482605A CN 201710918481 A CN201710918481 A CN 201710918481A CN 107482605 A CN107482605 A CN 107482605A
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- Prior art keywords
- triode
- resistance
- communication devices
- pressed
- diode
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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
- H02H9/044—Physical layout, materials not provided for elsewhere
Abstract
The invention discloses a kind of anti-over-pressed K line communication devices, including K line ends, power end and receiving terminal and transmitting terminal, in addition to for turning on the first triode and the second triode of control to communication；The base stage of first triode is connected by one the 4th resistance with K line ends, the colelctor electrode of first triode is connected with receiving terminal and is also connected by one the 5th resistance with ground wire, the emitter stage of first triode is connected by a second resistance with power end, and anti-overvoltage circuit is received so as to be formed；The base stage of second triode passes through one the 8th resistance and transmitting terminal, the colelctor electrode of second triode is connected with K line ends and is also connected by one the 7th resistance with power end, the emitter stage of second triode is connected with ground wire, and anti-overvoltage circuit is sent so as to be formed.Anti- overvoltage capabilities can be effectively improved by the present invention, damage of the anti-overvoltage to K line communication devices, improve production efficiency.
Description
Technical field
The present invention relates to K line communication fields, more particularly to a kind of anti-over-pressed K line communication devices.
Background technology
Engine with ECU has to detect by ECU before dispatching from the factory, and the communication of which part equipment room is, it is necessary to logical
K line communication devices are crossed to be detected.But existing K lines communication, without anti-over-pressed function is designed, this is allowed for when in use,
Easily cause K line communication devices to burn out, and influence production, when K line communication devices are damaged and can also be detected, K
Line communication device easily makes the data of transmission mistake occur, so that deviation occur in ECU testing results, can have a strong impact on product
Quality, even more so that occurring inconceivable consequence when in use.
The content of the invention
It is an object of the present invention to provide a kind of anti-over-pressed K line communication devices, anti-overvoltage capabilities can be effectively improved, are carried
High efficiency.
To realize the purpose, there is provided a kind of anti-over-pressed K line communication devices, including the K lines for being attached with ECU
Hold, for the power end being connected with external power source and receiving terminal and transmitting terminal for being connected with hardware interface, in addition to be used for
To the first triode and the second triode of communication conducting control；The base stage of first triode is used for K line ends by one
The 4th resistance that input signal is depressured is connected with K line ends, the colelctor electrode of first triode be connected with receiving terminal and
The 5th resistance for also being used to stablize receiving terminal output current potential by one is connected with ground wire, and the emitter stage of first triode passes through
One second resistance for being used to stablize the first triode input power is connected with power end, and so as to be formed, reception is anti-to cross piezoelectricity
Road；The base stage of second triode passes through the 8th resistance and transmitting terminal for being used for current limliting, the current collection of second triode
Pole is connected with K line ends and also connected by the 7th resistance for being used to stablize the second triode input power with power end
Connect, the emitter stage of second triode is connected with ground wire, and anti-overvoltage circuit is sent so as to be formed.
Preferably, the power end is passed sequentially through for carrying out the first resistor of current limliting to input power and for power supply
End stabilized input voltage is connected after the first diode of setting magnitude of voltage is connected with ground wire, the first resistor and first
The connection end of diode and second resistance and the 7th resistance, form the input power circuit of current limliting and voltage stabilizing.
Preferably, the first resistor is 90K Ω -150K Ω, and the second resistance is 100 Ω -300 Ω, the described 7th
Resistance is 300 Ω -600 Ω.
Preferably, the stable input voltage at the first diode both ends is direct current 24V.
Preferably, the amplification electricity for ensuring the first triode is parallel between the emitter stage of first triode and base stage
The 3rd resistor of potential difference and the second diode, the 3rd resistor connected with the second diodes in parallel and the second diode just
Pole is connected with the base stage of the first triode.
Preferably, the 3rd resistor is 150K Ω -250K Ω.
Preferably, the base stage of second triode is also used to ensure the second triode base stage stabilized input voltage by one
The 3rd diode be connected with ground wire, wherein, the positive pole of the 3rd diode is connected with ground wire.
Preferably, when the receiving terminal is also passed sequentially through with the 6th resistance for being used for current limliting and one for reception signal
It is connected after carrying out the light emitting diode series connection of luminescence display with ground wire, so as to form reception indicating circuit.
Preferably, the 4th resistance is 2.5K Ω -3K Ω, and the 8th resistance is 8K Ω -12K Ω.
Compared with prior art, its advantage is the present invention：
, can be effective by each voltage stabilizing flow restriction by the first triode of design and the second triode in the present invention
Anti- overvoltage capabilities are improved, damage of the anti-overvoltage to K line communication devices, improve production efficiency.Clever structure of the present invention, cost
It is low, it is anti-over-pressed so as to be solved the problems, such as with less cost.In the present invention by designing first resistor and the first diode energy
It is 24V enough to make power end stable operating voltage, and electric current will not cause to damage to element, forms protective circuit of voltage regulation.At this
By setting light emitting diode in receiving terminal in invention, the process of reception signal can be prompted.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
Embodiment
With reference to embodiment, the invention will be further described, but does not form any limitation of the invention, any
In the modification for the limited number of time that scope of the invention as claimed is made, still in scope of the presently claimed invention.
As shown in figure 1, the invention provides a kind of anti-over-pressed K line communication devices, including for being attached with ECU
K line ends 2, for the power end 1 being connected with external power source and receiving terminal 3 and transmitting terminal 4 for being connected with hardware interface, also wrap
Include the first triode X1 and the second triode X2 for turning on control to communication；First triode X1 base stage is used for by one
The 4th resistance R4 being depressured to the input signal of K line ends 2 is connected with K line ends 2, the first triode X1 colelctor electrode and receiving terminal
3 connect and are also connected by one for stablizing the 5th resistance R5 of the output current potential of receiving terminal 3 with ground wire, the first triode X1's
Emitter stage is connected by a second resistance R2 for being used to stablize the first triode X1 input powers with power end 1, so as to
Formed and receive anti-overvoltage circuit；Second triode X2 base stage is by the 8th resistance R8 and the transmitting terminal 4 for being used for current limliting, and second
Triode X2 colelctor electrode is connected with K line ends 2 and is also used for what the second triode X2 input powers were stablized by one
7th resistance R7 is connected with power end 1, and the second triode X2 emitter stage is connected with ground wire, and so as to be formed, transmission is anti-to cross piezoelectricity
Road.
Power end 1 passes sequentially through for carrying out the first resistor R1 of current limliting to input power and for being inputted to power end 1
Voltage stabilization is connected after the first diode D1 of setting magnitude of voltage is connected with ground wire, first resistor R1 and the first diode
D1 connection end and second resistance R2 and the 7th resistance R7, form the input power circuit of current limliting and voltage stabilizing.First diode D1
The stable input voltage at both ends is direct current 24V.
First resistor R1 is 100K Ω, and second resistance R2 is 200 Ω, and the 7th resistance R7 is 500 Ω.4th resistance R4 is
2.7K Ω, the 8th resistance R8 are 10K Ω.
In addition, first resistor R1 can also can also be for 90K Ω or 120K Ω or 150K Ω, the second resistance R2
100 Ω or 300 Ω, the 7th resistance R7 can also be 300 Ω or 400 Ω or 600 Ω, and the 4th resistance R4 can also be 2.5K
Ω or 3K Ω, the 8th resistance R8 are 8K Ω or 11K Ω or 12K Ω.
In embodiment, the first triode X1 and the second triode X2 selection low-power transistors, receiving terminal 3 and transmitting terminal
4 are arranged to asynchronous transmission standard interface RS-232 two ports, and K line ends 2 connect ECU K line connections, can be written and read ECU
Data, power end 1 connects direct current+24V power supplys, and ground wire connects direct current -24V power supplys.5th resistance R5 is arranged to 1K Ω.
In the present embodiment, the selection to second resistance R2 and the 7th resistance R7 resistances, the first triode X1 are passed through
With being worked under stable power supply for the second triode X2 so that the signal voltage of sending and receiving is stable.
In the present embodiment, by the selection to first resistor R1 and the first diode D1, protective circuit of voltage regulation, energy are formed
It is 24V enough to make power end stable operating voltage, and electric current will not cause to damage to element, so that the signal voltage of sending and receiving
It is stable.
The amplification potential difference for ensuring the first triode X1 is parallel between first triode X1 emitter stage and base stage
3rd resistor R3 and the second diode D2,3rd resistor R3 and the second diode D2 be connected in parallel and the second diode D2 just
Pole is connected with the first triode X1 base stage.3rd resistor R3 is 200K Ω.In addition, 3rd resistor R3 can also be 150K Ω or
180K Ω or 220K Ω or 250K Ω.
Second triode X2 base stage is also used to ensure the 3rd of the second triode X2 base stage stabilized input voltages by one
Diode D3 is connected with ground wire, wherein, the 3rd diode D3 positive pole is connected with ground wire.
Receiving terminal 3 also passes sequentially through is used for the 6th resistance R6 and one of current limliting for being lighted during reception signal with one
It is connected after the light emitting diode D4 series connection of display with ground wire, so as to form reception indicating circuit.In addition, transmitting terminal 4 can also be set
Put light emitting diode and be transmitted information alert, and receiving terminal 3 and transmitting terminal 4 are by selecting the light emitting diodes of different colours
Make a distinction.
In the present embodiment, the 6th resistance R6 is arranged to 1K Ω, and uses when each resistance is all according to general work
Direct current 24V power supplys carry out selection, so that the working stability of the present apparatus, excellent performance.
In the workflow of the present embodiment:When needing detection, the K line ends 2 of the present apparatus and ECU K lines connection are connected
Connect, power end 1 connects direct current 24V power supplys, and receiving terminal 3 and transmitting terminal 4 draw with No. 2 pins of the DB-9 interfaces of use and No. 3 respectively
Pin connects；When receiving the signal from ECU, signal is entered by K line ends 2, after being depressured by the 4th resistance R4, triggering first
Triode X1 break-make, after the voltage of power end 1 is by first resistor R1 and second resistance R2 decompression and current limliting, pass through first
Triode X1 is to receiving terminal 3 so that the input signal of K line ends 2 is converted into setting the signal output of voltage, and passes through light emitting diode
D4 is prompted；When sending signal to ECU, after the signal of transmission carries out current limliting by the 8th resistance R8, the second three-level is triggered
Pipe X2 break-make, after the voltage of power end 1 is by first resistor R1 and second resistance R2 decompression and current limliting, pass through the second three-level
Pipe X2 forms loop, the voltage swing of the output signal of K line ends 2 for the second triode X2 colelctor electrodes voltage swing and stably.
Anti- overvoltage capabilities can be effectively improved by the present invention, damage of the anti-overvoltage to K line communication devices, improve production
Efficiency.
It the above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, do not taking off
On the premise of from structure of the present invention, several modifications and improvements can also be made, these effects implemented all without the influence present invention
And practical applicability.
Claims (9)
1. a kind of anti-over-pressed K line communication devices, including the K line ends (2) for being attached with ECU, it is used for and external power source
The power end (1) of connection and the receiving terminal for being connected with hardware interface (3) and transmitting terminal (4), it is characterised in that：Also include using
In the first triode (X1) and the second triode (X2) that control is turned on to communication；The base stage of first triode (X1) passes through
One the 4th resistance (R4) for being used to be depressured K line ends (2) input signal is connected with K line ends (2), first triode
(X1) colelctor electrode is connected with receiving terminal (3) and also exports the 5th resistance of current potential for stablizing receiving terminal (3) by one
(R5) it is connected with ground wire, the emitter stage of first triode (X1) is used to enter the first triode (X1) input power by one
The stable second resistance (R2) of row is connected with power end (1), and anti-overvoltage circuit is received so as to be formed；Second triode (X2)
Base stage pass through the 8th resistance (R8) and the transmitting terminal (4) for being used for current limliting, colelctor electrode and the K lines of second triode (X2)
End (2) connects and also passes through the 7th resistance (R7) and power supply for being used to stablize the second triode (X2) input power
(1) connection is held, the emitter stage of second triode (X2) is connected with ground wire, and anti-overvoltage circuit is sent so as to be formed.
A kind of 2. anti-over-pressed K line communication devices according to claim 1, it is characterised in that：The power end (1) is successively
By for carrying out the first resistor (R1) of current limliting to input power and for electric in setting to power end (1) stabilized input voltage
The first diode (D1) of pressure value is connected after being connected with ground wire, the company of the first resistor (R1) and the first diode (D1)
End and second resistance (R2) and the 7th resistance (R7) are connect, forms the input power circuit of current limliting and voltage stabilizing.
A kind of 3. anti-over-pressed K line communication devices according to claim 2, it is characterised in that：The first resistor (R1)
For 90K Ω -150K Ω, the second resistance (R2) is 100 Ω -300 Ω, and the 7th resistance (R7) is 300 Ω -600 Ω.
A kind of 4. anti-over-pressed K line communication devices according to claim 2, it is characterised in that：First diode
(D1) the stable input voltage at both ends is direct current 24V.
A kind of 5. anti-over-pressed K line communication devices according to claim 1, it is characterised in that：First triode
(X1) be parallel between emitter stage and base stage the amplification potential difference for ensuring the first triode (X1) 3rd resistor (R3) and
Second diode (D2), the 3rd resistor (R3) and the second diode (D2) be connected in parallel and the second diode (D2) just
Pole is connected with the base stage of the first triode (X1).
A kind of 6. anti-over-pressed K line communication devices according to claim 5, it is characterised in that：The 3rd resistor (R3)
For 150K Ω -250K Ω.
A kind of 7. anti-over-pressed K line communication devices according to claim 1, it is characterised in that：Second triode
(X2) base stage also passes through the 3rd diode (D3) and ground for ensuring the second triode (X2) base stage stabilized input voltage
Line connects, wherein, the positive pole of the 3rd diode (D3) is connected with ground wire.
A kind of 8. anti-over-pressed K line communication devices according to claim 1, it is characterised in that：The receiving terminal (3) also according to
It is secondary by with one be used for current limliting the 6th resistance (R6) and one be used for reception signal when progress luminescence display light emitting diode
(D4) it is connected after connecting with ground wire, so as to form reception indicating circuit.
A kind of 9. anti-over-pressed K line communication devices according to claim 1, it is characterised in that：4th resistance (R4)
For 2.5K Ω -3K Ω, the 8th resistance (R8) is 8K Ω -12K Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710918481.8A CN107482605A (en) | 2017-09-30 | 2017-09-30 | A kind of anti-over-pressed K line communication devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710918481.8A CN107482605A (en) | 2017-09-30 | 2017-09-30 | A kind of anti-over-pressed K line communication devices |
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| Publication Number | Publication Date |
|---|---|
| CN107482605A true CN107482605A (en) | 2017-12-15 |
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ID=60605862
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710918481.8A Pending CN107482605A (en) | 2017-09-30 | 2017-09-30 | A kind of anti-over-pressed K line communication devices |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010094347A (en) * | 2000-04-06 | 2001-10-31 | 밍 루 | ECU error code displayer in car audio |
| CN201222724Y (en) * | 2008-07-08 | 2009-04-15 | 上海海能汽车电子有限公司 | Circuit for switching signal |
| CN106505516A (en) * | 2016-11-21 | 2017-03-15 | 法乐第(北京)网络科技有限公司 | A kind of overvoltage crowbar and electronic control unit ECU output circuits |
| CN107168901A (en) * | 2016-03-08 | 2017-09-15 | 德昌电机(深圳)有限公司 | Mongline two-way communication circuit |
| CN207218243U (en) * | 2017-09-30 | 2018-04-10 | 广西玉柴机器股份有限公司 | A kind of anti-over-pressed K line communication devices |
-
2017
- 2017-09-30 CN CN201710918481.8A patent/CN107482605A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010094347A (en) * | 2000-04-06 | 2001-10-31 | 밍 루 | ECU error code displayer in car audio |
| CN201222724Y (en) * | 2008-07-08 | 2009-04-15 | 上海海能汽车电子有限公司 | Circuit for switching signal |
| CN107168901A (en) * | 2016-03-08 | 2017-09-15 | 德昌电机(深圳)有限公司 | Mongline two-way communication circuit |
| CN106505516A (en) * | 2016-11-21 | 2017-03-15 | 法乐第(北京)网络科技有限公司 | A kind of overvoltage crowbar and electronic control unit ECU output circuits |
| CN207218243U (en) * | 2017-09-30 | 2018-04-10 | 广西玉柴机器股份有限公司 | A kind of anti-over-pressed K line communication devices |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171215 |
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| RJ01 | Rejection of invention patent application after publication |