CN106549370A - A kind of detection protection circuit - Google Patents
A kind of detection protection circuit Download PDFInfo
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- CN106549370A CN106549370A CN201610969368.8A CN201610969368A CN106549370A CN 106549370 A CN106549370 A CN 106549370A CN 201610969368 A CN201610969368 A CN 201610969368A CN 106549370 A CN106549370 A CN 106549370A
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- liang
- protection circuit
- circuit
- gate
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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
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/026—Current limitation using PTC resistors, i.e. resistors with a large positive temperature coefficient
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
-
- 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
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
Abstract
The invention discloses a kind of detection protection circuit, belongs to communication technical field.Detection protection circuit includes power detecting protection circuit and transmitting machine testing protection circuit, and power detecting protection circuit includes reverse protection circuit, mu balanced circuit and current foldback circuit, provides stable forward voltage and electric current to launch machine testing protection circuit；Transmitting machine testing protection circuit includes state detection circuit, reverse driving circuit and action protection circuit, can disconnect the connection with high voltage power supply when emitter breaks down in time.The present invention is by arranging power detecting protection and launching machine testing protection circuit; efficiently solve the problems, such as circuit malfunction and Breakdown Maintenance that input power reversal connection, voltage instability, excessively stream etc. cause; eliminate the unshielded potential safety hazard of transmitting machine testing protection circuit input power; simultaneously efficiently solve the problems, such as emitter after breaking down unprotected measure cause thrashing, improve safety and reliability when high-power transmitter works.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of detection protection circuit.
Background technology
The main task of emitter is the modulation for completing useful low frequency signal to high frequency carrier, and high frequency carrier is changed into
There is in a certain centre frequency certain bandwidth, the electromagnetic wave of antenna transmitting is fitted through.
High-power transmitter is usually operated under high voltage, high current, in order to ensure that emitter is operated in normal condition, is needed
The detection protection circuit of emitter is placed where high voltage, high current, emitter is carried out in real time state detection and
Monitoring, grasps the working condition of emitter, and the triggering system protection action in time when emitter breaks down, protects emitter
It is not damaged by.
During the present invention is realized, inventor has found that prior art at least has problems with：
The detection protection circuit of emitter is generally directly powered by power supply, situations such as reverse power connection, voltage instability, excessively stream
Under, the safety and reliability of meeting extreme influence emitter.
The content of the invention
In order to solve problem of the prior art, a kind of detection protection circuit is embodiments provided.The technical side
Case is as follows：
A kind of detection protection circuit is embodiments provided, the detection protection circuit includes being applied to launch machine examination
Survey protection circuit power detecting protection circuit, the power detecting protection circuit include reverse protection circuit, mu balanced circuit and
Current foldback circuit, the reverse protection circuit, mu balanced circuit and current foldback circuit are sequentially connected in series in voltage-stabilized power supply and described
Between transmitting machine testing protection circuit；
The reverse protection circuit, for just connecing with the voltage-stabilized power supply or reversal connection, is the transmitting machine testing protection electricity
Road provides forward voltage；
The mu balanced circuit, for the forward voltage is controlled below setting voltage；
The current foldback circuit, for the current control that provides the voltage-stabilized power supply below setting electric current.
Alternatively, the reverse protection circuit include the first diode D1, the second diode D2, the 3rd diode D3,
Four diode D4；The positive pole of the positive pole D1 of first diode is connected with the positive pole of the 4th diode D4, and described first
The negative pole of diode D1 is connected with the positive pole of the second diode D2, the negative pole of the second diode D2 and the described 3rd 2
The negative pole connection of pole pipe D3, the positive pole of the 3rd diode D3 are connected with the negative pole of the 4th diode D4；
The tie point of the positive pole of the negative pole of the first diode D1 and the second diode D2 connects for positive source
End, the positive pole of the 3rd diode D3 and the tie point of the negative pole of the 4th diode D4 are power cathode connection end, institute
State the second diode D2 negative pole and the negative pole of the 3rd diode D3 tie point be circuit anode connection end, described first
The positive pole of diode D1 is circuit negative pole connection end with the tie point of the positive pole of the 4th diode D4；The positive source connects
End and the power cathode connection end are connect for being connected with the voltage-stabilized power supply respectively, the circuit anode connection end for institute
The input connection of mu balanced circuit is stated, the circuit negative pole connection end is for being connected with the output end of the mu balanced circuit.
Preferably, the reverse protection circuit also includes current-limiting resistance R1 and LED, the current-limiting resistance R1
One end be connected with the positive source connection end, the other end of the current-limiting resistance R1 and the LED it is negative
Pole connects, and the positive pole of the LED is connected with the power cathode connection end.
Preferably, the mu balanced circuit includes protective resistance R2 and Zener diode D5, one end of protective resistance R2
It is connected with the circuit anode connection end, the other end of protective resistance R2 negative pole respectively with the Zener diode D5,
The current foldback circuit connection, the positive pole of the Zener diode D5 are connected with the circuit negative pole connection end.
It is highly preferred that the current foldback circuit includes semistor R3, the positive temperature coefficient temperature-sensitive
One end of resistance R3 is connected with the negative pole of the Zener diode D5, the other end of the semistor R3 and institute
State the protection circuit connection of transmitting machine testing.
Further, the power detecting protection circuit also includes filter circuit, and the filter circuit includes electrochemical capacitor
C1 and electric capacity C2, the positive pole of the electrochemical capacitor C1 are connected with the semistor R3, the electrochemical capacitor C1
Negative pole and the Zener diode D5 positive pole connection, one end of the electric capacity C2 and the semistor R3
Connection, the other end of the electric capacity C2 are connected with the positive pole of the Zener diode D5.
Alternatively, the detection protection circuit also includes the transmitting machine testing protection circuit, and the transmitting machine testing is protected
Protection circuit includes：
State detection circuit, for defeated when transmitter failure described at least two in five emitters A, B, C, D, E
Be out of order signal；
Reverse driving circuit, for the fault-signal is converted to drive signal；
Action protection circuit, for disconnect under the driving of the drive signal described five emitters A, B, C, D, E with
The connection of high voltage power supply.
Preferably, the state detection circuit include first liang of input and door U11, second liang of input and door U12, the
Three liang of inputs and door U13, the 4th liang of input and door U14, first liang of input OR gate U21, second liang of input OR gate
U22, the 3rd liang of input OR gate U23, the 4th liang of input OR gate U24, the 5th liang of input OR gate U31, the 6th liang of input
OR gate U32；
, for being connected with the emitter E, described first liang defeated for one input of first liang of input and door U11
Enter end with another input of door U11 for being connected with the emitter D；One of first liang of input OR gate U21
Input for being connected with the emitter E, another input of first liang of input OR gate U21 for described
Penetrate machine D connections；The output of one input of second liang of input OR gate U22 and first liang of input OR gate U21
End connection, another input of second liang of input OR gate U22 is for being connected with the emitter C；Described 3rd liang
One input of input OR gate U23 is connected with the output end of second liang of input OR gate U22, the 3rd liang of input
Another input of OR gate U23 is held for being connected with the emitter B；Second liang of input is defeated with one of door U12
Enter end to be connected with the output end of the 3rd liang of input OR gate U23, another input of second liang of input and door U12
Hold for being connected with the emitter A；One input and first liang of input of the 3rd liang of input and door U13
The output end connection of OR gate U21, another input of the 3rd liang of input and door U13 is for connecting with the emitter C
Connect；The 4th liang of input is connected with an input of door U14 with the output end of second liang of input OR gate U22,
The 4th liang of input and another input of door U14 are for being connected with the emitter B；The 4th liang of input or
One input of door U24 is connected with the output end of door U12 with second liang of input, the 4th liang of input OR gate
Another input of U24 is connected with the output end of door U13 with the 3rd liang of input；The 5th liang of input OR gate
One input of U31 is connected with the output end of door U14 with the 4th liang of input, the 5th liang of input OR gate U31
Another input be connected with the output end of door U11 with first liang of input；The 6th liang of input OR gate U32's
One input is connected with the output end of the 5th liang of input OR gate U31, and the 6th liang of input OR gate U32's is another
Individual input is connected with the output end of the 4th liang of input OR gate U24, the output end of the 6th liang of input OR gate U32
It is connected with the reverse driving circuit.
It is highly preferred that the reverse driving circuit includes two input NAND gates U4, two inputs NAND gate U4
One input is connected with the state detection circuit, another input of two inputs NAND gate U4 for it is described
Power detecting protection circuit connects, and the output end of two inputs NAND gate U4 is connected with the action protection circuit.
Further, the action protection circuit includes relay U5 and sustained diode 6, in the relay U5
One end of coil is connected with the reverse driving circuit, the other end of the relay U5 coils for the power detecting
Protection circuit connects, and the movable contact in the relay U5 is for being connected with the high voltage power supply, normal in the relay U5
Closed contact for being connected with described five emitters A, B, C, D, E, the positive pole of the sustained diode 6 and the reverse drive
Circuit connects, and the negative pole of the sustained diode 6 is for being connected with the power detecting protection circuit.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：
By voltage-stabilized power supply and transmitting machine testing protection circuit between be sequentially connected in series reverse protection circuit, mu balanced circuit,
Current foldback circuit, reverse protection circuit can be carried for transmitting machine testing protection circuit when voltage-stabilized power supply is just being connect with reversal connection
For forward voltage, mu balanced circuit can play a part of pressure limiting, and current foldback circuit can play a part of current limliting, effectively solving
Circuit malfunction and Breakdown Maintenance problem that voltage-stabilized power supply reversal connection, voltage instability, excessively stream etc. cause, eliminate transmitting machine testing and protect
The unshielded potential safety hazard of protection circuit input voltage-stabilized power supply, improves the safety and reliability of emitter.And circuit is simple,
Constituted using existing components and parts, cost of implementation is low.
Description of the drawings
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to making needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, can be obtaining other according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of structural representation of detection protection circuit that the embodiment of the present invention one is provided；
Fig. 2 is a kind of structural representation of detection protection circuit that the embodiment of the present invention two is provided.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment one
A kind of detection protection circuit is embodiments provided, the detection protection circuit includes being applied to launch machine testing
The power detecting protection circuit of protection circuit, referring to Fig. 1, the power detecting protection circuit includes reverse protection circuit 1, voltage stabilizing electricity
Road 2 and current foldback circuit 3, reverse protection circuit 1, mu balanced circuit 2, current foldback circuit 3 are sequentially connected in series in voltage-stabilized power supply 10
And transmitting machine testing protection circuit 20 between.
In the present embodiment, reverse protection circuit 1, for just connecing with voltage-stabilized power supply 10 or reversal connection, is that transmitting machine testing is protected
Protection circuit 20 provides forward voltage；Mu balanced circuit 2, for forward voltage is controlled below setting voltage；Current foldback circuit
3, for the current control that provides voltage-stabilized power supply 10 below setting electric current.
Wherein, just connecing and referring to that the anode connection terminal of reverse protection circuit is connected with the positive pole of voltage-stabilized power supply, reverse protection electricity
The negative pole connection end on road is connected with the negative pole of voltage-stabilized power supply；Reversal connection refers to the anode connection terminal and voltage-stabilized power supply of reverse protection circuit
Negative pole connection, the negative pole connection end of reverse protection circuit is connected with the positive pole of voltage-stabilized power supply.
Alternatively, referring to Fig. 1, reverse protection circuit 1 can including the first diode D1, the second diode D2, the three or two
Pole pipe D3, the 4th diode D4.The positive pole of the positive pole D1 of the first diode is connected with the positive pole of the 4th diode D4, the one or two pole
The negative pole of pipe D1 is connected with the positive pole of the second diode D2, and the negative pole of the negative pole and the 3rd diode D3 of the second diode D2 connects
Connect, the positive pole of the 3rd diode D3 is connected with the negative pole of the 4th diode D4.
The tie point of the positive pole of the negative pole of the first diode D1 and the second diode D2 be positive source connection end, the three or two
The tie point of the negative pole of the positive pole of pole pipe D3 and the 4th diode D4 be power cathode connection end, the negative pole of the second diode D2 with
The tie point of the negative pole of the 3rd diode D3 is circuit anode connection end, the positive pole and the 4th diode D4 of the first diode D1
The tie point of positive pole is circuit negative pole connection end.Positive source connection end and power cathode connection end be used for respectively with voltage-stabilized power supply
10 connections, for being connected with the input of mu balanced circuit 2, circuit negative pole connection end is used for and mu balanced circuit for circuit anode connection end
2 output end connection.
In implementing, can be connected with the positive pole of voltage-stabilized power supply 10 with positive source connection end, power cathode connection end
It is connected with the negative pole of voltage-stabilized power supply 10；Can also positive source connection end be connected with the negative pole of voltage-stabilized power supply 10, power cathode connect
Connect end to be connected with the positive pole of voltage-stabilized power supply 10.
Specifically, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4 can be Xiao
Special based diode, forward bias voltage relatively low (about 0.2V), loss pressure drop are little, and cost of implementation is low.
Preferably, referring to Fig. 1, reverse protection circuit 1 can also include current-limiting resistance R1 and LED, current limliting
One end of resistance R1 is connected with positive source connection end, and the other end of current-limiting resistance R1 is connected with the negative pole of LED,
The positive pole of LED is connected with power cathode connection end.Reverse protection circuit can be utilized in voltage-stabilized power supply reversal connection
Light emitting diode sends ruddiness warning, to remind staff.
Specifically, LED can be red light emitting diodes, and warning effect is good.Current-limiting resistance R1 can be
2.2KΩ。
Alternatively, referring to Fig. 1, mu balanced circuit 2 can include protective resistance R2 and Zener diode D5, protective resistance R2
One end is connected with circuit anode connection end, the other end of protective resistance R2 negative pole respectively with Zener diode D5, overcurrent protection
Circuit 3 connects, and the positive pole of Zener diode D5 is connected with circuit negative pole connection end.
Specifically, Zener diode D5 can be Zener diode 1N5252B, and cost of implementation is low.
Alternatively, referring to Fig. 1, current foldback circuit 3 can include positive temperature coefficient (English：Positive
Temperature Coefficient, abbreviation PTC) thermistor R3, one end and the Zener diode D5 of PTC thermistor R3
Negative pole connection, the other end of PTC thermistor R3 is connected with machine testing protection circuit 20 is launched.
Specifically, PTC thermistor R3 can be RXEF017-ND, and cost of implementation is low.
In a kind of implementation of the present embodiment, referring to Fig. 1, the power detecting protection circuit can also include filtered electrical
Road 4, filter circuit 4 are connected between current foldback circuit 3 and transmitting machine testing protection circuit 20.
Alternatively, filter circuit 4 can include electrochemical capacitor C1 and electric capacity C2, positive pole and the PTC temperature-sensitives of electrochemical capacitor C1
Resistance R3 connections, the positive pole connection of the negative pole and Zener diode D5 of electrochemical capacitor C1, one end of electric capacity C2 and PTC thermistor
R3 connects, and the other end of electric capacity C2 is connected with the positive pole of Zener diode D5.
Specifically, the specification of electrochemical capacitor C1 can be 470 μ F/50V, and the specification of electric capacity C2 can be 0.1 μ F.
It should be noted that the generally output 24V direct currents of voltage-stabilized power supply 10 supply electricity to power detecting protection circuit, launch machine testing
Protection circuit 20 generally needs 5V direct currents, therefore in actual applications, power detecting protection circuit and transmitting machine testing are protected
Can also connect between circuit 20 voltage conversion circuit, 24V direct currents are converted to into 5V direct currents.
Following is a brief introduction of the operation principle of power detecting protection circuit provided in an embodiment of the present invention：
When voltage-stabilized power supply 10 just connects, i.e., the positive pole of voltage-stabilized power supply 10 is connected with positive source connection end, voltage-stabilized power supply 10
Negative pole be connected with power cathode connection end, the second diode D2 and the 4th diode D4 conductings, the first diode D1, the three or two
Pole pipe D3 and LED cut-off, reverse protection circuit 1 are not processed to signal；When 10 reversal connection of voltage-stabilized power supply
When, i.e., the positive pole of voltage-stabilized power supply 10 is connected with power cathode connection end, and negative pole and the positive source connection end of voltage-stabilized power supply 10 connect
Connect, the first diode D1, the 3rd diode D3 and LED are turned on, the second diode D2 and the 4th diode D4
Cut-off, signals reverse is exported by reverse protection circuit 1, and luminous alarm.
No matter voltage-stabilized power supply 10 is just connecing or reversal connection simultaneously, and mu balanced circuit 2 all carries out voltage stabilizing process, and even signal voltage surpasses
Setting value (such as 24V) is crossed, Zener diode D5 is by voltage stabilization in setting value.Current foldback circuit 3 carries out overcurrent protection, even
Signal code is less than rated current, then PTC thermistor R3 is in low resistance state, does not affect the normal work of circuit；If signal is electric
Stream makes circuit in " disconnected as, when fault substantially exceeds rated current, PTC thermistor R3 is suddenly generated heat in high-impedance state
Open " state, it is to avoid circuit is destroyed；After failture evacuation, PTC thermistor R3 is recovered automatically to low resistance state, and circuit is extensive
Multiple normal work.Filter circuit 4 is filtered, by the electric capacity of two different capacitances, high frequency spurs in filtering circuit and low
Frequency clutter.
The embodiment of the present invention is by being sequentially connected in series reverse protection electricity between voltage-stabilized power supply and transmitting machine testing protection circuit
Road, mu balanced circuit, current foldback circuit, reverse protection circuit can be transmitting machine examination when voltage-stabilized power supply is just being connect with reversal connection
Survey protection circuit and forward voltage is provided, mu balanced circuit can play a part of pressure limiting, and current foldback circuit can play current limliting
Effect, efficiently solves the problems, such as circuit malfunction and Breakdown Maintenance that voltage-stabilized power supply reversal connection, voltage instability, excessively stream etc. cause, eliminates
The unshielded potential safety hazard of transmitting machine testing protection circuit input voltage-stabilized power supply, improves the security and reliability of emitter
Property.And circuit is simple, constituted using existing components and parts, cost of implementation is low.
Embodiment two
A kind of detection protection circuit is embodiments provided, referring to Fig. 2, the detection protection circuit includes launching machine examination
Survey protection circuit 20 and power detecting protection circuit 30.Specifically, power detecting protection circuit 30 can be provided for embodiment one
Power detecting protection circuit.
In the present embodiment, launching machine testing protection circuit 20 can include：
State detection circuit 21, for exporting when at least two transmitter failure in five emitters A, B, C, D, E
Fault-signal；
Reverse driving circuit 22, for fault-signal is converted to drive signal；
Action protection circuit 23, for five emitters A, B, C, D, E and high-tension electricity are disconnected under the driving of drive signal
The connection in source 40 (such as 10KV).
Alternatively, referring to Fig. 2, state detection circuit 21 can be including first liang of input and door U11, second liang of input
With door U12, the 3rd liang of input and door U13, the 4th liang of input and door U14, first liang of input OR gate U21, second liang it is defeated
Enter to hold OR gate U22, the 3rd liang of input OR gate U23, the 4th liang of input OR gate U24, the 5th liang of input OR gate U31, the 6th
Two input OR gate U32.
One input of first liang of input and door U11 for being connected with emitter E, first liang of input and door U11
Another input for being connected with emitter D；One input of first liang of input OR gate U21 for emitter E
Connection, another input of first liang of input OR gate U21 is for being connected with emitter D；Second liang of input OR gate U22's
One input is connected with the output end of first liang of input OR gate U21, another input of second liang of input OR gate U22
For being connected with emitter C；The output of one input and second liang of input OR gate U22 of the 3rd liang of input OR gate U23
End connection, another input of the 3rd liang of input OR gate U23 is for being connected with emitter B；Second liang of input and door U12
An input be connected with the output end of the 3rd liang of input OR gate U23, another input of second liang of input and door U12
Hold for being connected with emitter A；3rd liang of input is defeated with first liang of input OR gate U21 with an input of door U13
Go out end connection, another input of the 3rd liang of input and door U13 is for being connected with emitter C；4th liang of input and door
One input of U14 is connected with the output end of second liang of input OR gate U22, the 4th liang of input and door U14 another
Input is for being connected with emitter B；One input of the 4th liang of input OR gate U24 and second liang of input and door U12
Output end connection, the output end company of another input of the 4th liang of input OR gate U24 and the 3rd liang of input and door U13
Connect；One input of the 5th liang of input OR gate U31 is connected with the output end of door U14 with the 4th liang of input, and the 5th liang defeated
Enter to hold another input of OR gate U31 to be connected with the output end of door U11 with first liang of input；6th liang of input OR gate
One input of U32 is connected with the output end of the 5th liang of input OR gate U31, the 6th liang of input OR gate U32 another
Input is connected with the output end of the 4th liang of input OR gate U24, the output end and reverse drive of the 6th liang of input OR gate U32
Circuit 22 connects.
Specifically, first liang of input and door U11, second liang of input and door U12, the 3rd liang of input and door U13, the
From a piece of 74LS08, four liang of inputs can realize that a piece of 74LS08 includes four tunnels, two input and door, uses here with door U14
To four tunnels.First liang of input OR gate U21, second liang of input OR gate U22, the 3rd liang of input OR gate U23, the 4th liang of input
End OR gate U24, the 5th liang of input OR gate U31, the 6th liang of input OR gate U32 can select two panels 74LS32, it is a piece of including
Four tunnels, two input OR gate, shares six tunnels here.
In the present embodiment, the truth table of state detection circuit 21 can be as shown in following table one：
Table one
Simplification of a formula is carried out according to truth table：
Y=∑ m (3,5～7,9～15,17～31)
=BE+BD+AE+AD+AB+DE+CD+CE+BC+AC
=A (B+C+D+E)+B (C+D+E)+C (D+E)+DE.
It is readily apparent that, above-mentioned fraction in lowest terms is consistent with the circuit diagram of above-mentioned state detection circuit 21.
Alternatively, referring to Fig. 2, reverse driving circuit 22 can include two input NAND gates U4, two input NAND gates
One input of U4 is connected with state detection circuit 21, and another inputs of two input NAND gates U4 is for examining with power supply
Survey protection circuit 30 to connect, the output end of two input NAND gates U4 is connected with action protection circuit 23.
Specifically, reverse driving circuit 22 can select a piece of DS75752, a piece of DS75752 to include two input of two-way
NAND gate, is only used all the way here.
Alternatively, referring to Fig. 2, action protection circuit can include relay U5, one end of the coil in relay U5 with
Reverse driving circuit 22 connects, the other end of relay U5 coils for being connected with power detecting protection circuit 30, relay
Movable contact in U5 for being connected with high voltage power supply 40, the normally-closed contact in relay U5 for five emitter A, B, C, D,
E connects.
Specifically, the normally opened relay SPST-NO of the single-pole single-throw(SPST that relay U5 can be with selection work voltage as 5V.
Preferably, action protection circuit can also include sustained diode 6, the positive pole of sustained diode 6 and reversely drive
Dynamic circuit 22 connects, and the negative pole of sustained diode 6 is for being connected with power detecting protection circuit 30.Sustained diode 6 can be with
Prevent the counter electromotive force that relay is produced when disconnecting from impacting to circuit, damage chip, play afterflow effect.
Specifically, sustained diode 6 can select 1N4148.
Following is a brief introduction of the operation principle of transmitting machine testing protection circuit provided in an embodiment of the present invention：
When emitter is normal, output low level signal " 0 " is to state detection circuit 21；When transmitter failure, output
High level signal " 1 " is to state detection circuit 21.
If during an at most transmitter failure, output low level signal of state detection circuit 21 " 0 ", reverse driving circuit is defeated
Go out high level signal " 1 ", relay power-off is normally opened, attonity.
If during at least two transmitter failures, output high level signal of state detection circuit 21 " 1 " (i.e. fault-signal), instead
To drive circuit output low level signal " 0 " (i.e. drive signal), relay conducting, trigger relay generation action, five are sent out
The connection that machine is penetrated with high voltage power supply disconnects, and five emitters quit work, and protect emitter and system safety.
The embodiment of the present invention is exported when at least two transmitter failure in five emitters by state detection circuit
Fault-signal is converted to drive signal by fault-signal, reverse driving circuit, and action protection circuit is under the driving of drive signal
The connection of five emitters and high voltage power supply is disconnected, the unprotected measure after emitter breaks down that efficiently solves causes system
The problem of failure, improves safety and reliability when high-power transmitter works.And circuit is simple, it is only necessary to a small amount of
Gate chip, relay, diode and resistance and electric capacity, cost of implementation are low.
The foregoing is only presently preferred embodiments of the present invention, not to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (10)
1. it is a kind of to detect protection circuit, it is characterised in that the detection protection circuit includes being applied to launch machine testing protection electricity
The power detecting protection circuit on road, the power detecting protection circuit include reverse protection circuit, mu balanced circuit and overcurrent protection
Circuit, the reverse protection circuit, mu balanced circuit and current foldback circuit are sequentially connected in series in voltage-stabilized power supply and the transmitting machine examination
Survey between protection circuit；
The reverse protection circuit, for just connecing with the voltage-stabilized power supply or reversal connection, is that the transmitting machine testing protection circuit is carried
For forward voltage；
The mu balanced circuit, for the forward voltage is controlled below setting voltage；
The current foldback circuit, for the current control that provides the voltage-stabilized power supply below setting electric current.
2. detection protection circuit according to claim 1, it is characterised in that the reverse protection circuit includes the one or two pole
Pipe D1, the second diode D2, the 3rd diode D3, the 4th diode D4；The positive pole of the positive pole D1 of first diode and institute
The positive pole connection of the 4th diode D4 is stated, the negative pole of the first diode D1 is connected with the positive pole of the second diode D2,
The negative pole of the second diode D2 is connected with the negative pole of the 3rd diode D3, the positive pole of the 3rd diode D3 and institute
State the negative pole connection of the 4th diode D4；
The tie point of the positive pole of the negative pole of the first diode D1 and the second diode D2 be positive source connection end, institute
State the 3rd diode D3 positive pole and the negative pole of the 4th diode D4 tie point be power cathode connection end, described second
The tie point of the negative pole of diode D2 and the negative pole of the 3rd diode D3 is circuit anode connection end, first diode
The positive pole of D1 is circuit negative pole connection end with the tie point of the positive pole of the 4th diode D4；The positive source connection end and
The power cathode connection end be used for be connected with the voltage-stabilized power supply respectively, the circuit anode connection end for the voltage stabilizing
The input connection of circuit, the circuit negative pole connection end is for being connected with the output end of the mu balanced circuit.
3. detection protection circuit according to claim 2, it is characterised in that the reverse protection circuit also includes current limliting electricity
Resistance R1 and LED, one end of the current-limiting resistance R1 are connected with the positive source connection end, the current-limiting resistance
The other end of R1 is connected with the negative pole of the LED, the positive pole of the LED and the power cathode
Connection end connects.
4. detection protection circuit according to claim 2, it is characterised in that the mu balanced circuit include protective resistance R2 and
Zener diode D5, one end of protective resistance R2 are connected with the circuit anode connection end, protective resistance R2 it is another
One end negative pole respectively with the Zener diode D5, the current foldback circuit are connected, the positive pole of the Zener diode D5
It is connected with the circuit negative pole connection end.
5. detection protection circuit according to claim 4, it is characterised in that the current foldback circuit includes positive temperature system
Number thermistor R3, one end of the semistor R3 is connected with the negative pole of the Zener diode D5, described
The other end of semistor R3 is connected with the transmitting machine testing protection circuit.
6. detection protection circuit according to claim 5, it is characterised in that the power detecting protection circuit also includes filter
Wave circuit, the filter circuit include electrochemical capacitor C1 and electric capacity C2, the positive pole of the electrochemical capacitor C1 and the positive temperature system
The positive pole connection of the R3 connections of number thermistor, the negative pole of the electrochemical capacitor C1 and the Zener diode D5, the electric capacity C2
One end be connected with the semistor R3, the other end of the electric capacity C2 is with the Zener diode D5 just
Pole connects.
7. the detection protection circuit according to any one of claim 1～6, the detection protection circuit also include the transmitting
Machine testing protection circuit, the transmitting machine testing protection circuit include：
State detection circuit, for the output when transmitter failure described at least two in five emitters A, B, C, D, E therefore
Barrier signal；
Reverse driving circuit, for the fault-signal is converted to drive signal；
Action protection circuit, for described five emitters A, B, C, D, E and high pressure are disconnected under the driving of the drive signal
The connection of power supply.
8. detection protection circuit according to claim 7, it is characterised in that the state detection circuit include first liang it is defeated
Enter end and door U11, second liang of input and door U12, the 3rd liang of input and door U13, the 4th liang of input and door U14, first
Two input OR gate U21, second liang of input OR gate U22, the 3rd liang of input OR gate U23, the 4th liang of input OR gate U24,
5th liang of input OR gate U31, the 6th liang of input OR gate U32；
One input of first liang of input and door U11 for being connected with the emitter E, first liang of input
With another input of door U11 for being connected with the emitter D；One input of first liang of input OR gate U21
Hold for being connected with the emitter E, another input of first liang of input OR gate U21 for the emitter
D connects；One input of second liang of input OR gate U22 is connected with the output end of first liang of input OR gate U21
Connect, another input of second liang of input OR gate U22 is for being connected with the emitter C；The 3rd liang of input
End OR gate U23 an input be connected with the output end of second liang of input OR gate U22, the 3rd liang of input or
Another input of door U23 is for being connected with the emitter B；One input of second liang of input and door U12
It is connected with the output end of the 3rd liang of input OR gate U23, another input of second liang of input and door U12 is used
In being connected with the emitter A；One input and first liang of input OR gate of the 3rd liang of input and door U13
The output end connection of U21, the 3rd liang of input and another input of door U13 are for being connected with the emitter C；Institute
State the 4th liang of input to be connected with an input of door U14 with the output end of second liang of input OR gate U22, described
Four liang of inputs and another input of door U14 are for being connected with the emitter B；The 4th liang of input OR gate U24
An input be connected with the output end of door U12 with second liang of input, the 4th liang of input OR gate U24's is another
One input is connected with the output end of door U13 with the 3rd liang of input；One of the 5th liang of input OR gate U31
Input is connected with the output end of door U14 with the 4th liang of input, and another of the 5th liang of input OR gate U31 is defeated
Enter end to be connected with the output end of door U11 with first liang of input；One input of the 6th liang of input OR gate U32
Be connected with the output end of the 5th liang of input OR gate U31, another input of the 6th liang of input OR gate U32 with
The output end connection of the 4th liang of input OR gate U24, the output end of the 6th liang of input OR gate U32 are reverse with described
Drive circuit connects.
9. detection protection circuit according to claim 8, it is characterised in that the reverse driving circuit includes two inputs
NAND gate U4, an input of two inputs NAND gate U4 are connected with the state detection circuit, two input
Another input of NAND gate U4 for being connected with the power detecting protection circuit, two inputs NAND gate U4 it is defeated
Go out end to be connected with the action protection circuit.
10. detection protection circuit according to claim 9, it is characterised in that the action protection circuit includes relay
U5 and sustained diode 6, one end of the coil in the relay U5 are connected with the reverse driving circuit, the relay
The other end of U5 coils for being connected with the power detecting protection circuit, the movable contact in the relay U5 for institute
High voltage power supply connection is stated, the normally-closed contact in the relay U5 is for being connected with described five emitters A, B, C, D, E, described
The positive pole of sustained diode 6 is connected with the reverse driving circuit, the negative pole of the sustained diode 6 for the power supply
Detection protection circuit connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610969368.8A CN106549370A (en) | 2016-10-27 | 2016-10-27 | A kind of detection protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610969368.8A CN106549370A (en) | 2016-10-27 | 2016-10-27 | A kind of detection protection circuit |
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| Publication Number | Publication Date |
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| CN106549370A true CN106549370A (en) | 2017-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610969368.8A Pending CN106549370A (en) | 2016-10-27 | 2016-10-27 | A kind of detection protection circuit |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1377114A (en) * | 2002-04-26 | 2002-10-30 | 艾默生网络能源有限公司 | Auxilitary power supply |
| CN203086112U (en) * | 2012-12-27 | 2013-07-24 | 凯盛重工有限公司 | Comprehensive multi-loop motor protector for coal mine |
| CN203491754U (en) * | 2013-10-14 | 2014-03-19 | 成都天宇创新科技有限公司 | Reverse-connection-prevention protective plate for vanadium cell |
| CN203775016U (en) * | 2014-03-21 | 2014-08-13 | 北京经纬恒润科技有限公司 | Self-locking high-end driving circuit |
| CN104158307A (en) * | 2014-08-22 | 2014-11-19 | 重庆大学 | Online energy acquiring system used for ultrahigh voltage quad-bundled conductor power transmission line de-icing device |
| CN105262059A (en) * | 2015-09-30 | 2016-01-20 | 奇瑞汽车股份有限公司 | Active short-circuit protection circuit of electric automobile |
| CN205160064U (en) * | 2015-11-13 | 2016-04-13 | 成都秦川科技发展有限公司 | Power consumption device power anti -reverse connection circuit |
| CN205542596U (en) * | 2016-04-18 | 2016-08-31 | 广东美的生活电器制造有限公司 | Control circuit and domestic appliance |
-
2016
- 2016-10-27 CN CN201610969368.8A patent/CN106549370A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1377114A (en) * | 2002-04-26 | 2002-10-30 | 艾默生网络能源有限公司 | Auxilitary power supply |
| CN203086112U (en) * | 2012-12-27 | 2013-07-24 | 凯盛重工有限公司 | Comprehensive multi-loop motor protector for coal mine |
| CN203491754U (en) * | 2013-10-14 | 2014-03-19 | 成都天宇创新科技有限公司 | Reverse-connection-prevention protective plate for vanadium cell |
| CN203775016U (en) * | 2014-03-21 | 2014-08-13 | 北京经纬恒润科技有限公司 | Self-locking high-end driving circuit |
| CN104158307A (en) * | 2014-08-22 | 2014-11-19 | 重庆大学 | Online energy acquiring system used for ultrahigh voltage quad-bundled conductor power transmission line de-icing device |
| CN105262059A (en) * | 2015-09-30 | 2016-01-20 | 奇瑞汽车股份有限公司 | Active short-circuit protection circuit of electric automobile |
| CN205160064U (en) * | 2015-11-13 | 2016-04-13 | 成都秦川科技发展有限公司 | Power consumption device power anti -reverse connection circuit |
| CN205542596U (en) * | 2016-04-18 | 2016-08-31 | 广东美的生活电器制造有限公司 | Control circuit and domestic appliance |
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