CN207766138U - A kind of Q-switch driving power controller failure detection device - Google Patents
A kind of Q-switch driving power controller failure detection device Download PDFInfo
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- CN207766138U CN207766138U CN201721699473.0U CN201721699473U CN207766138U CN 207766138 U CN207766138 U CN 207766138U CN 201721699473 U CN201721699473 U CN 201721699473U CN 207766138 U CN207766138 U CN 207766138U
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Abstract
The utility model discloses a kind of Q-switch driving power controller failure detection devices, including：Signal input unit, for generating input signal；Control unit is connect with the signal input unit, for according to the input signal output digital reference signal and pulse control signal received；D/A conversion unit is connect with described control unit, for the digital reference signal to be converted into analog voltage reference；Radio frequency MOS output units, connect with described control unit, for exporting radiofrequency signal according to the pulse control signal received；Fault detection unit is connect with the D/A conversion unit and radio frequency MOS output units respectively, for carrying out fault detect according to the radiofrequency signal and analog voltage reference that receive.Implement to export the utility model has the beneficial effects that Q-switch power-supply controller of electric can be carried out fault detect and feedback, greatly facilitates the use of Q-switch driving power controller.
Description
Technical field
The utility model is related to power supply control fields, more specifically to a kind of Q-switch driving power controller failure
Detection device.
Background technology
Q-switch driving power is to drive the power supply of Q-switch, is a kind of power source special of driving Q-switch element manipulation, root
Corresponding radiofrequency signal is applied on Q-switch element according to external control signal, completing laser, whether there is or not control and carry out Q modulation.Q
The size of the radio-frequency power of Switching Power Supply output directly affects the performance of Q switch work, so being directed to different Q-switch elements
With different application scenarios, radio-frequency power should be exported and adjusted to value appropriate.
In solid state laser normal use, it is necessary to assure the normal work of Q-switch driving power.Therefore in solid-state laser
Device is in use, fault detect and protective device to Q-switch driving power are most important, the especially shape of Q-switch driving power
State failure is fed back and protection control.
Utility model content
The technical problem to be solved by the present invention is to exist for the Q-switch driving power controller of the prior art
Failure is fed back and the defect of protection control etc., provide a kind of fault detect that can effectively realize Q-switch power-supply controller of electric and
Feed back the Q-switch driving power controller failure detection device and method of output.
Technical solution adopted by the utility model to solve its technical problems is：Construct a kind of Q-switch driving power control
Device failure detector, including：
Signal input unit, for generating input signal；
Control unit is connect with the signal input unit, for exporting numerical reference according to the input signal received
Signal and pulse control signal；
D/A conversion unit is connect with described control unit, for the digital reference signal to be converted into simulating
Reference voltage；
Radio frequency MOS output units, connect with described control unit, for defeated according to the pulse control signal received
Go out radiofrequency signal；
Fault detection unit is connect with the D/A conversion unit and radio frequency MOS output units respectively, is used for basis
The radiofrequency signal received and analog voltage reference carry out fault detect.
Further include failure output unit in above-mentioned Q-switch driving power controller failure detection device, the failure inspection
It surveys unit to connect with described control unit and be used to export failure detection result to described control unit, the failure output is single
Member connect with described control unit and is shown for carrying out fault alarm according to the failure detection result received.
In above-mentioned Q-switch driving power controller failure detection device, the input that the signal input unit generates is believed
Number include radio frequency low-power digital reference signal and radio frequency high-power digital reference signal, described control unit penetrates what is received
Frequency low-power digital reference signal and radio frequency high-power digital reference signal are exported to the D/A conversion unit, the number
Type matrix is intended exporting to the fault detection unit, the analog voltage reference after converting unit is converted into the analog voltage reference
Including radio frequency low power analog reference voltage and radio frequency high-power analog voltage reference.
In above-mentioned Q-switch driving power controller failure detection device, the input that the signal input unit generates is believed
Number include enable signal and pulse-width signal, described control unit is used for according to the enable signal that receives and pulsewidth tune
Signal processed exports pulse control signal to the radio frequency MOS output units, and the radio frequency MOS output units are according to the pulse control
Signal processed exports radiofrequency signal, and the fault detection unit is according to the radio frequency low power analog reference voltage received and penetrates
The analog voltage reference of frequency high power and the radiofrequency signal carry out fault detect and export failure detection result to the control
Unit processed.
In above-mentioned Q-switch driving power controller failure detection device, the failure detection result is radio frequency low-power
Fault-signal and one kind in radio frequency high-power fault-signal and/or open circuit fault signal, and described control unit is receiving
When the open circuit fault signal, controls the radio frequency MOS output units and be in off-position.
The utility model also provides a kind of fault detection unit, is detected for above-mentioned Q-switch driving power controller failure
Device, the fault detection unit include transformer, the first operational amplifier, second operational amplifier and third operation amplifier
The primary coil of device, the transformer connects the radio frequency MOS output units, one end difference of the secondary electric circle of the transformer
Connect the reverse input end of the first operational amplifier and the input in the same direction of second operational amplifier and third operational amplifier
The noninverting input at end, first operational amplifier connects the radio frequency low power analog reference voltage, second operation
The reverse input end of amplifier connects radio frequency high-power analog voltage reference, the other end connection of the secondary coil of the transformer
The reverse input end of the third operational amplifier, first operational amplifier, second operational amplifier and third operation
The output end of amplifier is separately connected described control unit.
In above-mentioned Q-switch driving power controller failure detection device, the fault detection unit includes transformer,
One operational amplifier, second operational amplifier and third operational amplifier, the transformer primary coil connection described in penetrate
Frequency MOS output units, one end of the secondary electric circle of the transformer be separately connected the reverse input end of the first operational amplifier, with
And the noninverting input of second operational amplifier and third operational amplifier, the noninverting input of first operational amplifier connect
Connect the radio frequency low power analog reference voltage, the reverse input end connection radio frequency high-power simulation of the second operational amplifier
Reference voltage, the other end of the secondary coil of the transformer connects the reverse input end of the third operational amplifier, described
The output end of first operational amplifier, second operational amplifier and third operational amplifier is separately connected described control unit.
In above-mentioned Q-switch driving power controller failure detection device, the fault detection unit further includes first whole
Unit, the second rectification unit and voltage regulation unit are flowed, wherein：First rectification unit is connected to time of the transformer
Between one end and the reverse input end of first operational amplifier of grade coil, second rectification unit is connected to the change
Between the other end of the secondary coil of depressor and the reverse input end of the third operational amplifier, the voltage regulation unit connects
It connects between first rectification unit and the noninverting input of the third operational amplifier, and for adjusting the radio frequency MOS
The voltage magnitude of the radiofrequency signal of output unit output, the third operational amplifier is for detecting open circuit fault signal.
The utility model also provides another fault detection unit, is used for above-mentioned Q-switch driving power controller failure
Detection device, the fault detection unit include the connection radio frequency MOS output units for decaying to radiofrequency signal
And the π type attenuation networks of radiofrequency signal of the two-way with different voltages amplitude are exported, it is connected respectively with the π types attenuation network
The first front-end receiver and the second front-end receiver for carrying out rectification and gain amplification, connect with first front-end receiver
The first low-pass filter connect, the second low-pass filter being connect with second front-end receiver, is separately connected described first
The operational amplifier difference block of low-pass filter and the second low-pass filter, and respectively with first low-pass filter,
The operational amplifier comparator module of D/A conversion unit connection, wherein：The operational amplifier comparator module and fortune
Amplifier differential module is calculated to connect with described control unit respectively.
In above-mentioned Q-switch driving power controller failure detection device, the fault detection unit includes described in connection
Radio frequency MOS output units for being decayed and being exported radiofrequency signal of the two-way with different voltages amplitude to radiofrequency signal
π type attenuation networks, the first front-end receiver for carrying out rectification and gain amplification connected respectively with the π types attenuation network
With the second front-end receiver, the first low-pass filter being connect with first front-end receiver, with second preamble reception
Second low-pass filter of device connection, is separately connected the operational amplifier of first low-pass filter and the second low-pass filter
Difference block, and the operational amplifier comparator that is connect respectively with first low-pass filter, D/A conversion unit
Module, wherein：The operational amplifier comparator module is connected with described control unit respectively with operational amplifier difference block.
The utility model also provides a kind of Q-switch driving power controller failure detection method, the Q-switch driving power
Controller failure detection method includes：
Digital reference signal inputs；
The digital reference signal is converted to analog voltage reference；
Pulse control signal is exported, radiofrequency signal is exported according to the pulse control signal；
Fault detect is carried out according to the analog voltage reference and radiofrequency signal.
In above-mentioned Q-switch driving power controller failure detection method, according to analog voltage reference and radiofrequency signal
Fault detect is carried out to specifically include：
Analog voltage reference is compared with radiofrequency signal, the event of radio frequency low-power is judged whether according to comparison result
Barrier or radio frequency high-power failure, and if it exists, then export radio frequency low-power fault-signal or radio frequency high-power fault-signal；If not depositing
Then judging whether open circuit fault, and if it exists, then export open circuit fault signal to control Q-switch driving power controller
In off-position, if being not present, controls Q-switch driving power controller and be in power supply state.
In above-mentioned Q-switch driving power controller failure detection method, further include before exporting pulse control signal：
Enable signal is judged whether, if judging whether reset signal in the presence of if, if there is no close pulse
Control the output of signal；
If there are reset signal, pulse control signal is exported again according to the signal is resetted.
Implement the Q-switch driving power controller failure detection device and method of the utility model, has below beneficial to effect
Fruit：Analog voltage reference is received respectively from D/A conversion unit and radio frequency MOS output units by fault detection unit
Failure detection result is exported after being compared with radiofrequency signal, and failure detection result is exported to control unit, passes through the event
Barrier detection unit can detect radio frequency low-power failure, radio frequency high-power failure and open circuit fault, and control unit is connecing
When receiving open circuit fault signal, radio frequency MOS output units can be controlled and be in off-position, that is, cut off radio frequency MOS output units
Power supply system, while break impulse control signal gives radio frequency MOS output units.Therefore, pass through the failure of Q-switch power-supply controller of electric
Detection and feedback output realize protection and the operations such as reset, enabled of Q-switch power-supply controller of electric, to greatly facilitate Q
The use of switch drive power-supply controller of electric.
Description of the drawings
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing：
Fig. 1 is the structural schematic diagram of Q-switch driving power controller failure detection device provided by the utility model；
Fig. 2 is the circuit diagram of the first preferred embodiment of fault detection unit in Fig. 1；
Fig. 3 is the circuit diagram of the second preferred embodiment of fault detection unit in Fig. 1；
Fig. 4 is the flow diagram of Q-switch driving power controller failure detection method provided by the utility model.
Specific implementation mode
For a clearer understanding of the technical features, objectives and effects of the utility model, now control attached drawing is detailed
Illustrate specific embodiment of the present utility model.
It is the structural representation of Q-switch driving power controller failure detection device provided by the utility model referring to Fig. 1
Figure.In this embodiment, failure detector includes：
Signal input unit 101, for generating input signal, input signal here includes pulse-width signal, is enabled
Signal, reset signal, radio frequency low-power digital reference signal and radio frequency high-power digital reference signal.Control unit 102, with letter
Number input unit 101 connects, and signal input unit 101 is supplied to 102 input signal of control unit.D/A conversion unit
103, it is connect with control unit 102, turns analog circuit for multipath high-speed number, for digital voltage to be converted into analog voltage,
In the present embodiment, control unit 102 receives the radio frequency low-power digital reference signal and radio frequency that signal input unit 101 generates
High-power digital reference signal, i.e. digital reference signal export the digital reference signal to D/A conversion unit 103,
It is converted into analog voltage reference output, analog voltage reference here includes radio frequency low power analog reference voltage and radio frequency Gao Gong
Rate analog voltage reference.
Radio frequency MOS output units 104, connect with control unit 102, and control unit 102 receives signal input unit here
101 pulse-width signals generated, export a synchronous pulse control signal to radio frequency MOS output units 104, radio frequency MOS
Output unit 104 is rf signal amplification circuit, and a radiofrequency signal is exported to failure according to the pulse control signal received
Detection unit 105.Fault detection unit 105 connects with digital-to-analogue conversion module 103 and radio frequency MOS output units 104 respectively
It connects, for carrying out fault detect, in the present embodiment fault detect according to the radiofrequency signal and analog voltage reference that receive
Unit 105 can be used for radio frequency low-power, radio frequency high-power and open circuit fault detection.
Q-switch driving power controller failure detection device further includes failure output unit 106, above-mentioned fault detection unit
105 also connect with control unit 102 and are used to after carrying out fault detect export testing result to control unit 102, and failure is defeated
Go out unit 106 to connect with control unit 102 and be used to carry out malfunction coefficient according to the failure detection result received, in this implementation
Example in, fault detection unit 105 detect to deposit after a failure, by control unit 102 can control failure output unit 106 into
Row fault alarm exports.
For fault detection unit 105 after detecting fault-signal, control unit 102 can not only control event in the present embodiment
Hinder output unit 106 and carry out fault alarm output, but also open circuit protection operation can be carried out, to play protection whole device
Effect.
Above-mentioned fault detection unit 105 according to the analog voltage reference received i.e. radio frequency low power analog reference voltage and
The radiofrequency signal that radio frequency high-power analog voltage reference and radio frequency MOS output units 104 export exports failure after being compared
Testing result, and failure detection result is exported to control unit 102.Here failure detection result is radio frequency low-power failure
Signal and one kind in radio frequency high-power fault-signal and/or open circuit fault signal, and control unit 102 is receiving breaking event
When hindering signal, control radio frequency MOS output units 104 are in off-position, that is, cut off the power supply system of radio frequency MOS output units 104
System, while break impulse controls signal to radio frequency MOS output units 104.If fault detection unit 105 detects fault-signal,
Control unit 102 can control failure output unit 106 and export a total failare alarm signal.In addition, control unit 102 is receiving
When the enable signal and reset signal that generate to signal input unit 101, the power supply system of radio frequency MOS output units 104 is connected
System, while the fault-signal that detection fault detection unit 105 exports again, and generate radio frequency low-power failure if had before
Signal, radio frequency high-power fault-signal or open circuit fault signal can then eliminate the fault alarm letter of the generation of failure output unit 106
It is detected again again after number.
Specifically, fault detection unit 105 includes transformer T1, the first operational amplifier IC1, second operational amplifier
IC2 and third operational amplifier IC3, physical circuit schematic diagram are as shown in Figure 2.One end of the primary coil of transformer T1 point
Not Lian Jie radio frequency MOS output units 105 (i.e. radiofrequency signal input) and ground, one end of the secondary electric circle of transformer T1 connects respectively
The reverse input end of the first operational amplifier IC1, the noninverting input of second operational amplifier IC2 and third operation is connect to put
The noninverting input of big device IC3, the noninverting input of the first operational amplifier IC1 connect radio frequency low power analog reference voltage
The reverse input end of DA1, second operational amplifier IC2 connect radio frequency high-power analog voltage reference DA2, the primary of transformer T1
The other end of coil is grounded.The reversed input of the other end connection third operational amplifier IC3 of the secondary coil of transformer T1
The output end of end, the first operational amplifier IC 1, second operational amplifier IC 2 and third operational amplifier IC 3 connect respectively
Connect control unit 102.
Above-mentioned fault detection unit 105 further includes the first rectification unit (in the present embodiment, preferably diode D1),
Two rectification units (in the present embodiment, preferably diode D2) and voltage regulation unit 200, wherein：Diode D1 is connected to
Between one end of the secondary coil of transformer T1 and the reverse input end of the first operational amplifier IC1, diode D2 is connected to change
Between the other end and the reverse input end of third operational amplifier IC1 of the secondary coil of depressor T1, voltage regulation unit 200 connects
It connects between the cathode of diode D1 and the noninverting input of third operational amplifier IC3, and for adjusting radio frequency MOS output units
The voltage magnitude of the radiofrequency signal RF of 105 outputs, third operational amplifier IC1 is for detecting open circuit fault signal.
Preferably, voltage regulation unit 200 includes adjustable resistor R1 and pull-up resistor R2, wherein：Adjustable resistor R1
Movable plate pin connection diode D1 cathode, stator pin one end ground connection of adjustable resistor R1, the other end respectively with third
The in-phase input end of operational amplifier IC3 is connected with one end of pull-up resistor R2, and the other end of pull-up resistor R2 connects power supply
VCC。
According to the particular circuit configurations of above-mentioned fault detection unit 105, concrete operating principle is：
The primary coil of transformer T1 receives the radiofrequency signal RF of the output of radio frequency MOS output units 104, secondary coil
The voltage magnitude of radiofrequency signal is obtained by diode D1 rectifications, when the voltage magnitude of radiofrequency signal is low less than DA1 values, that is, radio frequency
When power reference voltage, the first operational amplifier IC1 exports high level, and fault detection unit 105 just will produce radio frequency low-power
Fault-signal, i.e. low-power are alarmed；When the voltage magnitude of radiofrequency signal is higher than DA2 values, second operational amplifier IC2 outputs are high
Level, fault detection unit 105 just will produce radio frequency high-power fault-signal, i.e. high power is alarmed；Pass through voltage regulation unit
Pull-up resistor R2 in 200 connects the partial pressure of power supply VCC and adjustable resistor R1, adjusts the voltage magnitude and two of radiofrequency signal
Pole pipe D2 rectifications obtain the voltage magnitude of earth signal, and are exported by the both ends third operational amplifier IC3 differential signal, in radio frequency
In the case that MOS output units 104 have external load, third operational amplifier IC3 output ends export high level, in radio frequency MOS
In the case that output unit 104 does not have external load, third operational amplifier IC3 output ends export low level, i.e. open circuit fault
Signal, failure output unit 106 carry out open circuit fault alarm indication.Control unit 102 is receiving fault detection unit simultaneously
After the open circuit fault signal of 105 outputs, the power supply system of radio frequency MOS output units 104 can be cut off, Pulse Width Control is also no longer exported
Signal is to radio frequency MOS output units 104, to play the role of protecting whole system.
As shown in figure 3, the circuit diagram of another preferred embodiment for above-mentioned fault detection unit 105, in the implementation
In example, fault detection unit 105 includes the π types attenuation network 400 of connection radio frequency MOS output units 104, is decayed respectively with π types
The first front-end receiver 401 and the second front-end receiver 402 that network 400 connects, the connect with the first front-end receiver 401
One low-pass filter 403, the second low-pass filter 404 being connect with the second front-end receiver 402, is separately connected the first low pass filtered
The operational amplifier difference block 405 of wave device 403 and the second low-pass filter 404, and respectively with the first low-pass filter
403, the operational amplifier comparator module 406 that D/A conversion unit 103 connects.Wherein：Operational amplifier comparator mould
Block 406 is connected with control unit 102 respectively with operational amplifier difference block 405.
Specifically, π types attenuation network 400 passes through magnetic according to the radiofrequency signal received from radio frequency MOS output units 104
Core inductance generates rf attenuation signal, which passes through two-way lawnmower receiver i.e. the first front-end receiver
401 and second front-end receiver 402 carry out rectification and gain amplification, wherein the radiofrequency signal after the first front-end receiver 401
With high voltage amplitude, the radiofrequency signal through the second front-end receiver 402 has low voltage amplitudes, corresponding respectively again later to send out
Give two-way low-pass filter i.e. the first low-pass filter 403 and the second low-pass filter 404.By the first low-pass filter
403 radiofrequency signal is sent respectively to operational amplifier comparator module 406 and operational amplifier difference block 405, by
The radiofrequency signal of two low-pass filters 404 is then sent to operational amplifier difference block 405.
Control unit 102 passes through D/A conversion unit 103, the radio frequency low-power reference voltage and radio frequency Gao Gong of generation
Rate reference voltage is separately connected operational amplifier comparator module 406, and operational amplifier comparator module 406 is by low with first
The signal that bandpass filter 403 generates is compared, it is to be understood that operational amplifier comparator module 406 here is packet
Two comparator modules are included, are respectively intended to radio frequency low-power reference voltage and radio frequency high-power reference voltage and the first low pass
Filter 403 generate signal be compared, you can by corresponding comparison result judge whether there is generate low-power failure and
High power failure exports a low-power alarm voltage, a high power alarm voltage accordingly, to 102 meeting of control unit
According to the voltage signal of the two comparator modules output to determine whether having low-power failure and high power failure, to defeated
It has corresponding fault-signal to failure output unit 106 and carries out malfunction coefficient.
Operational amplifier difference block 405 is then low according to the first low-pass filter 403 (high voltage) and second that receive
Bandpass filter 404 (low-voltage) carries out calculus of differences, according to one generated by control unit 102 for judging whether there is connection
The detection signal of external loading to generate different VSWR standing wave voltage feedback signals, and then judges radio frequency MOS output units
Whether 104 connect load, and the voltage feedback signal judgement that control unit 102 is exported according to operational amplifier difference block 405 is
It is no that there is open circuit fault, if having detected open circuit fault, controls failure output unit 106 and carry out open circuit fault alarm, together
When can cut off the power supply systems of radio frequency MOS output units 104, play the role of protecting whole system.
As described above, the utility model provides two kinds of fault detection units, as shown in Figures 2 and 3.
Preferably, above-mentioned failure output unit 106 includes three light emitting diodes for being separately connected control unit 102, right
It is indicated applied to radio frequency low-power indicating fault, radio frequency high-power indicating fault and open circuit fault.
The utility model also provides a kind of Q-switch driving power controller failure detection method, based on above-mentioned Q-switch
Driving power controller failure detection device.Its flow chart is as shown in figure 3, the fault detection method includes the following steps：
S300：Digital reference signal inputs, and in the present embodiment, which includes two reference signals, is penetrated
Frequency low-power digital reference signal and radio frequency high-power digital reference signal, are generated by signal input unit 101, can be strings
Row bus or parallel bus numeral input, output is to digital simulation turn after control unit 102 receives the two reference signals
Change unit 103.
S301：D/A conversion unit 103 is the DA devices of high speed, and digital reference signal is converted to simulation benchmark electricity
Pressure, in the present embodiment, radio frequency low-power digital reference signal and radio frequency high-power digital reference signal is converted into penetrating respectively
Frequency low power analog reference voltage and radio frequency high-power analog voltage reference.
S304：Control unit 102 exports arteries and veins according to the pulse-width signal generated by signal input unit 101 received
To radio frequency MOS output units 104, radio frequency MOS output units 104 export radio frequency according to the pulse control signal to be believed punching control signal
Number, pulse-width signal here includes external Q impulse signal and the detection signal that itself generates, can select fixed arteries and veins
Width modulation input, the one of which in variable impulse width modulation input.
Fault detection unit 105 is according to the radio frequency low power analog reference voltage exported by D/A conversion unit 103
The radiofrequency signal exported with radio frequency high-power analog voltage reference and radio frequency MOS cell 104 carries out fault detect.Specifically,
In the present embodiment, fault detection unit 105 is mainly used for after radiofrequency signal is converted into voltage magnitude, respectively work(low with radio frequency
Rate analog voltage reference and radio frequency high-power analog voltage reference are compared, and radio frequency low power analog reference voltage and radio frequency are high
Power analog reference voltage is detected with carrying out the detection of radio frequency low-power fault-signal and radio frequency high-power fault-signal.These events
Barrier detection signal can feed back to control unit 102, and control unit 102 can carry out following steps：
S305：Judge whether radio frequency low-power failure or radio frequency high-power failure, if in the presence of if by radio frequency low-power
Fault-signal or radio frequency high-power fault-signal are exported to be shown to the progress fault alarm of failure output unit 106, if there is no penetrate
Frequency low-power failure or radio frequency high-power failure then enter step S306.Here control unit 102 can be according to the failure received
Signal control failure output unit 106 carries out corresponding fault alarm output, and fault alarm output mainly has three tunnels, total alert all the way
Warning output is accused, in addition two-way is radio frequency low-power fault alarm and radio frequency high-power fault alarm respectively.
S306：Open circuit fault signal detection, i.e. fault detection unit 105 are detected meeting open circuit fault and tie detection
Fruit feeds back to control unit 102, and fault detection unit 105 is specifically to pass through after the voltage magnitude of radiofrequency signal can be adjusted
Differential signal exports, and open circuit fault signal is exported in the case of no external load.If it is disconnected that control unit 102 receives this
Road fault-signal, control failure output unit 106 carry out open circuit fault alarm, simultaneously switch off the confession of radio frequency MOS output units 104
Electric system, radio frequency MOS output units 104 do not generate radiofrequency signal output and it is defeated to connect radio frequency MOS if open circuit fault is not present
Go out unit 104, normal powering load.
It is exported according to the pulse-width signal generated by signal input unit 101 received in above-mentioned control unit 102
Before pulse control signal is to radio frequency MOS output units 104, further include control unit 102 judge whether enable signal and
The step of reset signal, specifically includes：
S302：Judge whether enable signal, i.e., whether control unit 102 receives is produced by signal input unit 101
Raw enable signal.If entering step S303 in the presence of if, if there is no the output for closing pulse control signal, refer to external control
Signal and the internal signal generated not will produce output control.
S303：It judges whether reset signal, i.e., whether has the reset letter for receiving and being generated by signal input unit 101
Number, if there are reset signal, pulse control signal is exported according to reset signal again, reset signal refers to that can generate detection
Pulse, it is normal in connection for detecting open circuit fault, fault alarm output can be eliminated, if there is no reset letter
Number then enter step S304.
The Q-switch driving power failure detector and fault detection method for implementing the utility model, pass through fault detect
Unit 105 receives analog voltage reference (in this reality respectively from D/A conversion unit 103 and radio frequency MOS output units 104
Apply in example as radio frequency low power analog reference voltage and radio frequency high-power analog voltage reference) and radiofrequency signal be compared it is rear defeated
Be out of order testing result, and failure detection result is exported to control unit 102, can be examined by the fault detection unit 105
Radio frequency low-power failure, radio frequency high-power failure and open circuit fault are measured, and control unit 102 is receiving open circuit fault letter
Number when, radio frequency MOS output units 104 can be controlled and be in off-position, that is, cut off the power supply system of radio frequency MOS output units 104,
Break impulse controls signal to radio frequency MOS output units 104 simultaneously.Therefore, by the fault detect of Q-switch power-supply controller of electric and
Feedback output realizes protection and the operations such as reset, enabled of Q-switch power-supply controller of electric, is driven to greatly facilitate Q-switch
The use of dynamic power-supply controller of electric.
The embodiments of the present invention are described above in conjunction with attached drawing, but the utility model is not limited to
The specific implementation mode stated, the above mentioned embodiment is only schematical, rather than restrictive, this field it is common
Technical staff is not departing from the utility model aims and scope of the claimed protection situation under the enlightenment of the utility model
Under, many forms can be also made, these are belonged within the protection of the utility model.
Claims (8)
1. a kind of Q-switch driving power controller failure detection device, which is characterized in that including：
Signal input unit, for generating input signal；
Control unit is connect with the signal input unit, for exporting digital reference signal according to the input signal received
And pulse control signal；
D/A conversion unit is connect with described control unit, for the digital reference signal to be converted into simulation benchmark
Voltage；
Radio frequency MOS output units, connect with described control unit, for being penetrated according to the pulse control signal output received
Frequency signal；
Fault detection unit is connect with the D/A conversion unit and radio frequency MOS output units respectively, for according to reception
The radiofrequency signal arrived and analog voltage reference carry out fault detect.
2. Q-switch driving power controller failure detection device according to claim 1, which is characterized in that further include event
Hinder output unit, the fault detection unit connect with described control unit and for exporting failure detection result to the control
Unit processed, the failure output unit connect with described control unit and for carrying out event according to the failure detection result received
Hinder alarm indication.
3. Q-switch driving power controller failure detection device according to claim 1, which is characterized in that the signal
The input signal that input unit generates includes radio frequency low-power digital reference signal and radio frequency high-power digital reference signal, described
Control unit exports the radio frequency low-power digital reference signal received and radio frequency high-power digital reference signal to the number
Type matrix intends converting unit, and output is to the fault detect after the D/A conversion unit is converted into the analog voltage reference
Unit, the analog voltage reference include radio frequency low power analog reference voltage and radio frequency high-power analog voltage reference.
4. Q-switch driving power controller failure detection device according to claim 3, which is characterized in that the signal
The input signal that input unit generates includes enable signal and pulse-width signal, and described control unit is used for what basis received
The enable signal and pulse-width signal export pulse control signal to the radio frequency MOS output units, and the radio frequency MOS is defeated
Go out unit and radiofrequency signal is exported according to the pulse control signal, the fault detection unit is low according to the radio frequency received
Power analog reference voltage and radio frequency high-power analog voltage reference and the radiofrequency signal carry out fault detect and by failures
Testing result is exported to described control unit.
5. Q-switch driving power controller failure detection device according to claim 4, which is characterized in that the failure
Testing result is radio frequency low-power fault-signal and one kind in radio frequency high-power fault-signal and/or open circuit fault signal, and
Described control unit controls the radio frequency MOS output units and is in off-position when receiving the open circuit fault signal.
6. Q-switch driving power controller failure detection device according to claim 4, which is characterized in that the failure
Detection unit includes transformer, the first operational amplifier, second operational amplifier and third operational amplifier, the transformer
Primary coil connect the radio frequency MOS output units, one end of the secondary electric circle of the transformer is separately connected the first operation
The noninverting input of the reverse input end and second operational amplifier and third operational amplifier of amplifier, first fortune
The noninverting input for calculating amplifier connects the radio frequency low power analog reference voltage, the second operational amplifier it is reversed defeated
Enter end connection radio frequency high-power analog voltage reference, the other end of the secondary coil of the transformer connects the third operation and puts
The reverse input end of big device, first operational amplifier, second operational amplifier and third operational amplifier output end
It is separately connected described control unit.
7. Q-switch driving power controller failure detection device according to claim 6, which is characterized in that the failure
Detection unit further includes the first rectification unit, the second rectification unit and voltage regulation unit, wherein：First rectification unit
It is connected between one end of the secondary coil of the transformer and the reverse input end of first operational amplifier, described second
Rectification unit be connected to the other end of the secondary coil of the transformer and the third operational amplifier reverse input end it
Between, the voltage regulation unit connects between first rectification unit and the noninverting input of the third operational amplifier,
And the voltage magnitude of the radiofrequency signal for adjusting the radio frequency MOS output units output, the third operational amplifier are used for
Detect open circuit fault signal.
8. Q-switch driving power controller failure detection device according to claim 4, which is characterized in that the failure
Detection unit includes the connection radio frequency MOS output units for being decayed and being exported two-way to radiofrequency signal with difference
The π type attenuation networks of the radiofrequency signal of voltage magnitude, what is connected respectively with the π types attenuation network is used to carry out rectification and gain
The first front-end receiver and the second front-end receiver of amplification, the first low-pass filtering being connect with first front-end receiver
Device, the second low-pass filter being connect with second front-end receiver are separately connected first low-pass filter and second
The operational amplifier difference block of low-pass filter, and respectively with first low-pass filter, D/A conversion unit
The operational amplifier comparator module of connection, wherein：The operational amplifier comparator module and operational amplifier difference block
It is connected respectively with described control unit.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107786077A (en) * | 2017-12-08 | 2018-03-09 | 深圳瑞丰恒激光技术有限公司 | A kind of Q-switch driving power controller failure detection means and method |
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2017
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107786077A (en) * | 2017-12-08 | 2018-03-09 | 深圳瑞丰恒激光技术有限公司 | A kind of Q-switch driving power controller failure detection means and method |
| CN107786077B (en) * | 2017-12-08 | 2024-05-31 | 深圳瑞丰恒激光技术有限公司 | Q-switch driving power supply controller fault detection device and method |
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