CN206710917U - Device is found based on APC and the laser semiconductor material evidence of constant temperature intelligent control - Google Patents
Device is found based on APC and the laser semiconductor material evidence of constant temperature intelligent control Download PDFInfo
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- CN206710917U CN206710917U CN201720220468.0U CN201720220468U CN206710917U CN 206710917 U CN206710917 U CN 206710917U CN 201720220468 U CN201720220468 U CN 201720220468U CN 206710917 U CN206710917 U CN 206710917U
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Abstract
Device is found based on APC and the laser semiconductor material evidence of constant temperature intelligent control the utility model discloses a kind of, optical lens combination structure, cooling mechanism, control system storehouse and battery installation storehouse including coaxial distribution and order socket, multiple-channel output driving control system is set in the control system storehouse, and multiple-channel output driving control system includes the automated power control drive circuit for exporting stable light and the intelligent constant-temperature for preventing optical maser wavelength from drifting about controls semiconductor cooler circuit.The utility model finds device based on APC and the laser semiconductor material evidence of constant temperature intelligent control, exports stable luminous power, possesses the laser semiconductor working environment for preventing that optical maser wavelength from drifting about.
Description
Technical field
It the utility model is related to technical field of photoelectric instruments, more particularly to a kind of swashing based on APC and constant temperature intelligent control
Photosemiconductor material evidence finds device.
Background technology
In existing laser discovering device, the PD in laser semiconductor as the reference voltage, attends by LD transmitting laser outputs
The rise of power, laser discovering device indoor temperature increase, and because laser is very high for the sensitiveness of temperature, power is not
Disconnected rise, it will be unable to ensure the stability that laser is luminous；In existing portable laser discovering device, only with letters such as fans
Single active heat removal form, it is difficult to meet the low-temperature working environment of laser, and then cause, the laser spectrum wavelength of light output is with temperature
The rise of degree and drift about, can not meet to excite the fluorescence of material evidence to show；For example, the laser spectrum of conventional 445nm wavelength
It can be achieved to excite sweat vestige biological evidence, but as the rise of temperature, wavelength can constantly increase, once exceeding this
Wavelength, it may be difficult to show sweat vestige biological evidence well.
Utility model content
The utility model provides a kind of based on APC and the laser semiconductor material evidence of constant temperature intelligent control discovery device, output
Stable luminous power, possesses the laser semiconductor working environment for preventing that optical maser wavelength from drifting about.
The utility model uses following technical scheme：
Device, including coaxial distribution and order socket are found based on APC and the laser diode material evidence of constant temperature intelligent control
Optical lens combination structure, cooling mechanism, control system storehouse and battery installation storehouse, it is characterised in that the control system storehouse
Interior setting multiple-channel output driving control system, multiple-channel output driving control system include being used for the automated power control for exporting stable light
Drive circuit processed and the intelligent constant-temperature for preventing optical maser wavelength from drifting about control semiconductor cooler circuit.
Further, the automated power control drive circuit include order electrical connection dc source, first comparator,
Electric capacity charge and discharge module, constant current source module, laser diode, the pole of photoelectricity two for detecting the laser diode Output optical power
Pipe and backfeed loop module, the input of the output end connection first comparator of backfeed loop module form closed circuit, passed through
The luminous power of negative feedback mechanism stabilized lasers diode stablizes light so as to export.
Preferably, the constant current source module includes the first operational amplifier, the second operational amplifier, the first triode, the
Two triodes, the first diode, the second diode, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance,
First electric capacity and voltage-regulator diode；
First operational amplifier, its normal phase input end connect the output end of the electric capacity charge and discharge module as the constant-current source
The input of module, its inverting input connect the first end of the first electric capacity, the second end connection first fortune of the first electric capacity
The output end of amplifier is calculated, its output end connects the control terminal of the first triode by first resistor；The control of first triode
The anode of end connection voltage-regulator diode, the negative electrode of voltage-regulator diode connect the negative electrode of the first diode, the anode of the first diode
Connect the inverting input of first operational amplifier；
First triode, its hot end connection power end, the second resistance that its cold end is used for partial pressure by one connect
Connect output end of the laser diode as the constant current source module；
Second triode, its hot end connect the negative electrode of the voltage-regulator diode, its cold end ground connection, its control terminal
The first end of second resistance is connected, the second end of second resistance connects the anode of the second diode, and the negative electrode of the second diode connects
Connect the inverting input of first operational amplifier；
Second operational amplifier, its normal phase input end and 3rd resistor first end connection, its inverting input respectively with
The second end connection of 3rd resistor connects with the first end of the 4th resistance, the second end of the 4th resistance and second operation amplifier
The output end connection of device, the output end of second operational amplifier A 2 by one be used for the 5th resistance of defencive function with it is described
The inverting input connection of first operational amplifier, for detecting the output end current of the constant current source module.
Further, the backfeed loop module includes current detecting chip, the 3rd operational amplifier, the 4th operation amplifier
Device, the 6th resistance and the 7th resistance, the input of the output end of the photodiode as current detecting chip, current detecting
The output end of chip connects the normal phase input end of the 3rd operational amplifier, and it is defeated that the inverting input of the 3rd operational amplifier connects its
Go out end, the inverting input of the output end connection four-operational amplifier of the 3rd operational amplifier, four-operational amplifier is just
Phase input connects the output end of four-operational amplifier by the 6th resistance, and the normal phase input end of four-operational amplifier passes through
7th resistance eutral grounding, the input of the output end of four-operational amplifier as the first comparator.
Preferably, the multiple-channel output driving control system also includes delay startup gradually bright drive circuit, for preventing from grasping by mistake
Make the moment startup laser diode to light,
Gradually bright drive circuit is arranged between the dc source and the first comparator delay startup, the dc source
Output end connection delay startup gradually bright drive circuit input, the output end connection described first of delay startup gradually bright drive circuit
The input of comparator.
Further, gradually bright drive circuit includes the first π types filter circuit, the time delay network being sequentially connected with to the delay startup
Circuit and the 2nd π type filter circuits；
The time delay network circuit includes triode in parallel, the 8th resistance, the 4th electric capacity, the 5th electric capacity, the 8th electric capacity, the
Three electrochemical capacitors and the 9th electrochemical capacitor；The output end of the first π type filter circuits is as the defeated of the time delay network circuit
Enter end, the input of the time delay network circuit connects the first end of the 8th resistance, and the second end of the 8th resistance passes through institute
The 3rd electrochemical capacitor ground connection is stated, the second end of the 8th resistance connects the anode of the 3rd electrochemical capacitor；The time delay network electricity
The input on road connects the colelctor electrode of the triode in parallel, and the base stage of the triode in parallel passes through the 5th capacity earth, institute
The common port between the base stage of triode in parallel and the 5th electric capacity is stated, passes through the second end of the resistance of the 4th capacitance connection the 8th
Common port between the anode of the 3rd electrochemical capacitor, the emitter stage of the triode in parallel pass through the described 9th electrolysis electricity
Hold ground connection, the emitter stage of the triode in parallel is connected with the anode of the 9th electrochemical capacitor, the hair of the triode in parallel
Emitter-base bandgap grading is used as the output end of the time delay network circuit by the 8th electric capacity.
Further, the intelligent constant-temperature control semiconductor cooler circuit includes
Thermistor, the environment temperature of laser diode work in device, its output end are found for gathering the material evidence
The input of an one-chip computer is connected by an analog to digital conversion circuit；
One-chip computer, its first output end connect semiconductor refrigeration circuit by a D/A converting circuit, and it second
Output end connects a fan；
Semiconductor refrigerating circuit, including the second comparator, phase inverter, subtracting amplifier, directing controller, semiconductor refrigerating
Device and sample resistance；Second comparator, the output end of its first input end connection D/A converting circuit, which is used as, partly to be led
The input of system cold circuit, its first output end connect the input of the directing controller, its second output end connection one
The input of phase inverter, the output end of the phase inverter connect the input of the directing controller；Directing controller, it first
Output end connects the first input end of the semiconductor cooler, its second output end connects the first end of the sample resistance,
Second end of the sample resistance connects the second input of the semiconductor cooler, there is provided bidirectional current；Subtracting amplifier,
Its first input end connects the first end of the sample resistance, and its second input connects the second end of the sample resistance, its
Output end connects the second input of second comparator, and forming negative feedback mechanism makes the electric current of output constant；
Constant-current source, power supply is provided for thermistor, analog to digital conversion circuit and one-chip computer.
Preferably, the directing controller include the first NPN triode, the second NPN triode, the first PNP triodes and
Second PNP triode,
The base stage of first NPN triode and the first PNP triode connects the output end of second comparator respectively, and first
The Base-Emitter of NPN triode and the first PNP triode connects the semiconductor cooler respectively, the first NPN triode and
The colelctor electrode of first PNP triode connects power supply respectively；The base stage of second NPN triode and the second PNP triode connects respectively
The colelctor electrode of the output end of the phase inverter, the second NPN triode and the second PNP triode is grounded respectively, the second NPN triode
The first end of the sample resistance, the second end connection of the sample resistance are connected respectively with the emitter stage of the second PNP triode
The semiconductor cooler.
Further, multiple-channel output driving control system is set in the control system storehouse and also set on axis in storehouse
Put the fan for radiating；The cooling mechanism is multi-through hole radiator, and laser half is set on the axis of multi-through hole radiator inside
Conductor, semiconductor cooler is set in the rear end of laser semiconductor, in the more of fan, multi-through hole radiator and semiconductor cooler
The effect of weight radiating and cooling is lower to keep laser semiconductor operating ambient temperature to prevent optical maser wavelength from drifting about；The optical lens combination knot
Structure includes the first optical lens combination structure and the second optical lens combination structure of the neighbouring cooling mechanism, the first optical lens
Mirror combining structure sets biconvex lens and flat glass from back to front along axis, the second optical lens combination structure, along axis from
Laser facula shaping homogenization lens and aspherical biconvex lens are set forward afterwards.
Beneficial effect
(1) automated power control drive circuit, by the discharge and recharge of electric capacity charge and discharge module, and backfeed loop module is anti-
Infeed mechanism so that constant current source module is finely adjusted electric current, so as to reach the stable luminous power of laser semiconductor output.
(2) control semiconductor cooler circuit to detect present laser semiconductor by thermistor by intelligent constant-temperature to work
Environment temperature, single-chip microcomputer provides corresponding control signal, and driving directing controller provides bidirectional current, control executing agency half
Conductor refrigerator TEC freezes or heating so that the environment temperature of laser semiconductor work is constant, so as to prevent laser wave journey by raft down the Yangtze River
Move.
(3) delay startup gradually bright drive circuit, time delay network circuit is realized using triode in parallel and electric capacity by discharge and recharge,
Personal injury caused by so as to protect laser semiconductor and prevent maloperation.
Brief description of the drawings
Fig. 1 is the utility model embodiment 1 based on APC and the laser semiconductor material evidence of constant temperature intelligent control discovery device
Structural representation；
Fig. 2 is the structural representation for the automated power control APC drive circuits that the utility model embodiment 1 provides；
Fig. 3 is the structural representation for the intelligent constant-temperature control semiconductor cooler circuit that the utility model embodiment 1 provides；
Fig. 4 is the structural representation for the automated power control APC drive circuits that the utility model embodiment 2 provides；
Fig. 5 is the structural representation for the intelligent constant-temperature control semiconductor cooler circuit that the utility model embodiment 2 provides；
Fig. 6 is the structural representation for the automated power control APC drive circuits that the utility model embodiment 3 provides；
Fig. 7 is the structural representation for the delay startup gradually bright drive circuit that the utility model embodiment 3 provides.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Embodiment 1
Referring to Fig. 1, device, including coaxial line L distributions are found based on APC and the laser semiconductor material evidence of constant temperature intelligent control
And optical lens combination structure, cooling mechanism, control system storehouse 13 and the aluminum production cell installation storehouse 14 of order socket, the aluminum
Double group lithium batteries 17 are placed in the inside of battery installation storehouse 14, and rear portion sets aluminum production cell to install storehouse closure 15, aluminum production cell installation
Material evidence is arranged on storehouse 14 and finds that device provides the derailing switch 16 of on/off；Multiple-channel output is set to drive in control system storehouse 13
Control system 3 and fan 23 for radiating is also set up on axis L in storehouse；Cooling mechanism is multi-through hole radiator 10, more
Laser semiconductor 104 is set on the inside axis L of through hole radiator 10, semiconductor refrigerating is set in the rear end of laser semiconductor 104
Device 2 (Thermo Electric Cooler, hereinafter referred to as TEC), in the multiple of fan 23, multi-through hole radiator 10 and TEC 2
Radiating and cooling effect is lower to keep the operating ambient temperature of laser semiconductor 104 to prevent optical maser wavelength from drifting about；Optical lens combines structure
The second optical lens that structure 11 and neighbouring cooling mechanism are combined including the first optical lens combines structure 12, the first optical lens
Combining structure 11 sets biconvex lens 8 and flat glass 9, the second optical lens combination structure 12, edge from back to front along axis L
Axis L sets laser facula shaping homogenization lens 5 and aspherical biconvex lens 6,7 from back to front.
In use, opening derailing switch 16, the drive control of multiple-channel output driving control system 3 is launched in laser semiconductor 104
Laser, its light beam is by shaping homogenization lens 5, the light beam by the beam shaping of elliptic systems into approximate circle distribution, the shaping
Beam sequence afterwards is expanded by aspherical biconvex lens 6,7 and biconvex lens 8, and being irradiated finally by flat glass 9 needs
The object surface to be detected, check biological evidence.
Wherein, multiple-channel output driving control system 3 include being used for the automated power control drive circuit for exporting stable light and
Intelligent constant-temperature for preventing optical maser wavelength from drifting about controls semiconductor cooler circuit.
Referring to Fig. 2, automated power control (Automatic Power Control, abbreviation APC) drive circuit includes order
Double groups of lithium batteries 100, first comparator 101, electric capacity charge and discharge module 102, constant current source module 103, the laser diode of electrical connection
(LD), for detecting the photodiode PD and backfeed loop module 105 of the laser diode LD Output optical power, wherein,
Laser diode LD and photodiode PD encapsulation composition laser semiconductors 104, the output end connection the of backfeed loop module 105
The input of one comparator 101 forms closed circuit, by negative feedback mechanism stabilized lasers diode LD luminous power so as to
The stable light of output.
The operation principle of APC drive circuits：After system electrification, the normal phase input end setting positive voltage of first comparator 101
Value VSET, negative-phase input voltage are assumed to be 0, then the low level that first comparator 101 exports causes capacitor charge and discharge module 102
Electric capacity is charged, with the slow rising of capacitance voltage, the driving current of constant current source module 103 constantly raises, laser diode
LD output intensities constantly raise, and photodiode PD probe currents become big, so as to cause the output voltage of backfeed loop module 105
Rise, until after exceeding the normal phase input end voltage VSET of first comparator 101, first comparator 101 is exported by low transition
For the inverse process of high level, then execution said process：Electric capacity charge and discharge module 102 is discharged, the power of laser semiconductor 104 reduces,
Thus move in circles, the final luminous power of stabilized lasers semiconductor 104.
Capacitor charge and discharge module 102 is according to the high-low cycle saltus step of the output voltage of first comparator 101 come to electric capacity charge and discharge
Electric module 102 carries out discharge and recharge, and most its voltage value stabilization is in certain preset value at last, so as to indirect control constant current source module 103
Input voltage, and the electric current of laser semiconductor 104 is further controlled, constant current source module 103 directly drives laser semiconductor 104,
The input voltage and driving current direct proportionality of laser semiconductor 104.
Referring to Fig. 3, the intelligent constant-temperature control semiconductor cooler circuit includes
Thermistor 21, the environment temperature for finding that laser semiconductor 104 works in device for gathering the material evidence, its is defeated
Go out the input that end connects one-chip computer 20 by A/D change-over circuits 22；
One-chip computer 20 (model 89C52), its first output end connect semiconductor refrigerating by D/A change-over circuits 24
Circuit 25, its second output end connect a fan 23；One-chip computer 20 is also connected with display 27 and overload alarm respectively
Circuit 28.
Semiconductor refrigerating circuit 25, including the second comparator A5, phase inverter I1, subtracting amplifier A6, directing controller, half
Conductor refrigerator TEC and sample resistance R；The output end of second comparator A5, its first input end connection D/A change-over circuit 24 is made
For the input of semiconductor refrigerating circuit 25, its first output end connects the input of the directing controller, its second output
End connection phase inverter I1 input, phase inverter I1 output end connect the input of the directing controller；Oriented control
Device, its first output end connection semiconductor cooler TEC first input end, its second output end connect the sample resistance R
First end, sample resistance R the second end connection semiconductor cooler TEC the second input, there is provided bidirectional current；Subtraction is put
Big device A6, its first input end connection sample resistance R first end, its second input connection sample resistance R the second end, its
Output end connects the second comparator A5 the second input, and forming negative feedback mechanism makes the electric current of output constant；
Constant-current source 26, it is that thermistor 21, A/D change-over circuits 22 and one-chip computer 20 provide power supply.
Intelligent constant-temperature controls semiconductor cooler circuit operation principle：Semiconductor laser is gathered in real time using thermistor 21
The temperature data of device, is then converted to data signal by A/D change-over circuits 22, and deposit single-chip microcomputer 89C52 internal data is deposited
Reservoir, send display 27 to show, and compared with setting value, controlled quentity controlled variable and defeated by single-chip microcomputer 20 is obtained by PID algorithms
Go out, by D/A change-over circuits 24 connect semiconductor refrigerating circuit 25 go control executing agency semiconductor cooler TEC refrigeration or
Heating, to keep the temperature of laser diode LD in multi-through hole radiator 10 constant, so as to ensure that laser semiconductor 104 exists
Worked under stationary temperature.Semiconductor cooler TEC is driven with adjustable voltage-controlled current source.Display 27 uses digital-scroll technique,
It can show and temperature and the in real time temperature of monitoring laser diode LD are set.Overload alarm circuit 28 is used to monitor laser diode LD
Temperature exceed set temperature limitation when alarm.
Embodiment 2
The present embodiment is based on embodiment 1, is different from part and is, referring to Fig. 4, automated power control APC drive circuits
In, constant current source module 103 includes the first operational amplifier A 1 (model LT1006), (model of the second operational amplifier A 2
LT1789), the first triode Q1, the second triode Q2, the first diode D1, the second diode D2, first resistor R1, the second electricity
Hinder R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the first electric capacity C1 and voltage-regulator diode DW1；
First operational amplifier A 1, the output end of its normal phase input end connection electric capacity charge and discharge module 102 is as constant-current source mould
The input of block 103, its inverting input connect the first electric capacity C1 first end, the first electric capacity C1 the second end connection first
The output end of operational amplifier A 1, the control terminal that its output end passes through first resistor R1 the first triodes of connection Q1；One or three pole
Pipe Q1 control terminal connection voltage-regulator diode DW1 anode, voltage-regulator diode DW1 negative electrode connect the first diode D1 the moon
Pole, the first diode D1 anode connect the inverting input of the first operational amplifier A 1；
First triode Q1, its hot end connection power end VCC, its cold end pass through second electricity for being used for partial pressure
Resistance connects output end of the laser diode LD as the constant current source module；
Second triode Q2, its hot end connect the negative electrode of the voltage-regulator diode DW1, and its cold end is grounded, its
Control terminal connection second resistance R2 first end, second resistance R2 the second diode D2 of the second end connection anode, the two or two
Pole pipe D2 negative electrode connects the inverting input of the first operational amplifier A 1；
Second operational amplifier A 2, its normal phase input end are connected with 3rd resistor R3 first end, its inverting input point
It is not connected with 3rd resistor R3 the second end and the connection of the 4th resistance R4 first end, the 4th resistance R4 the second end is transported with second
Amplifier A2 output end connection is calculated, the output end of the second operational amplifier A 2 passes through a 5th resistance R5 for being used for defencive function
It is connected with the inverting input of the first operational amplifier A 1, for detecting the output end current of constant current source module 103.
Capacitor charge and discharge module 102 is to form backfeed loop, realize the vital part of automated power control.It is stable
The power of laser semiconductor 104 is that the electric current that laser semiconductor 104 is flowed through by fine setting realizes that this fine adjustment function is to pass through
What the mechanism of automatic fluctuations was realized.First operational amplifier is fed back to by the fixed gain output of the second operational amplifier A 2
A1 inverting inputs and form closed loop, the introducing of the second operational amplifier A 2 enables the common ground of laser diode LD negative electrode, to be easy to
Test.In addition, adding laser diode LD switch off current control circuit, the output Enable Pin of the first operational amplifier A 1 passes through
First triode Q1 base potential is turned off into laser diode LD electric current with drawing, switchs and closes equivalent to laser semiconductor 104
Close, and when the switch is opened, laser diode LD electric current can be achieved and slowly rise to predetermined value.On component is chosen,
LT1006 operational amplifiers and LT1789 instrument amplifiers are single supply power supply type amplifiers, disclosure satisfy that single supply power supply
Demand.In circuit work, the multiplication factor of the second operational amplifier A 2 (LT1789) is A=10, flows through laser diode LD electricity
Stream I and input voltage U relation be：I=0.1U.
Wherein, I unit is milliampere, and U unit is volt, i.e., when input voltage changes to 2.5V by 0V, can be achieved
Laser diode current by 0mA to 250mA linear change.
PIN or PD photodetectors are come with butterfly encapsulation laser semiconductor 104 to be used to detect light intensity, photodetection
Device can obtain and detect the current signal of light intensity proportion relation, by carrying out voltage conversion to the current signal, putting
Big processing can obtain the monitoring signals of practicality.
Backfeed loop module 105 includes current detecting chip (model MAX4008), the 3rd operational amplifier A the 3, the 4th
Operational amplifier A 4, the 6th resistance R6 and the 7th resistance R7, photodiode PD output end is as current detecting chip
MAX4008 input, current detecting chip MAX4008 output end connect the normal phase input end of the 3rd operational amplifier, the
The inverting input of three operational amplifiers connects its output end, and the output end of the 3rd operational amplifier A 3 connects the 4th operation amplifier
Device A4 inverting input, four-operational amplifier A4 normal phase input end pass through the 6th resistance R6 connection four-operational amplifiers
A4 output end, four-operational amplifier A4 normal phase input end are grounded by the 7th resistance R7, four-operational amplifier A4's
Input of the output end as first comparator A1.
MAX4008 is a high-precision current detection chip, dedicated for detection PD or PIN photoelectricity in fiber optic applications
The electric current of detector, its REF pins are reference current input pins, and OUT pins are to detect voltage output pin, its magnitude of voltage
Size and REF pin electric currents are proportional.When REF reference currents change in the range of 250nA to 2.5mA, current detecting
Chip MAX4008 accuracy of detection can be maintained within 5%；On the premise of precision is loosened to 10%, detection current range can
Expand to 10nA to 10mA.Current detecting chip MAX4008 output voltage UMAX4008(unit mV) and reference current IREFIt is (single
Position μ A) relational expression be：UMAX4008=IREFR
Thus, output voltage range corresponding to 250nA~2.5mA REF reference current values is 0.25mV~2.5V.
0.25mV~2.5V magnitude of voltage needs to convert is amplified to required voltage range, and this operational amplifier A 4 by being made up of
In-phase proportion computing circuit realizes that its proportionality coefficient is 1+Rf/R.Notice a bit, current detecting chip MAX4008 output
Resistance is 10k Ω, and according to the difference of PIN, luminous intensity etc., current detecting chip MAX4008 output voltage may be as little as
Several millivolts, in order to prevent output voltage from having decay in next stage input, transported in current detecting chip MAX4008 and in-phase proportion
The voltage follower for adding one-level to be made up of operational amplifier A 3 between circuit is calculated, for isolating, is improved in current detecting chip
MAX4008 " bringing onto load " ability.Finally, the output voltage U0 of operational amplifier A 4 and current detecting chip MAX4008 is exported
Voltage UMAX4008Relational expression be：
U0=UMAX4008 × (1+Rf/R)
Rf and R resistance needs to be determined according to specific LD and PIN parameters.
Referring to Fig. 5, directing controller described in semiconductor refrigerating circuit 25 includes the first NPN triode Q3, the 2nd NPN tri-
Pole pipe Q5, the first PNP triode and the second PNP triodes of Q4 Q6, four transistors are Darlington transistor,
First NPN triode Q3 and the first PNP triode Q4 base stage connect the output end of second comparator respectively,
First NPN triode Q3 and the first PNP triode Q4 Base-Emitter connect the semiconductor cooler, the first NPN respectively
Triode Q3 and the first PNP triode Q4 colelctor electrode connect power supply VCC respectively；Second NPN triode Q5 and the 2nd PNP tri- poles
Pipe Q6 base stage connects the colelctor electrode point of phase inverter I1 output end, the second NPN triode Q5 and the second PNP triode Q6 respectively
It is not grounded, the second NPN triode Q5 and the second PNP triode Q6 emitter stage connect sample resistance R first end respectively, take
Sample resistance R the second end connection semiconductor cooler TEC.
Drive part is by the second comparator A5, reverser I1, sample resistance R, semiconductor system in semiconductor refrigerating circuit 25
Cooler TEC and four Darlington transistor compositions, the combining structure of Darlington transistor, can easily realize electric current in electrothermal refrigeration device
Flow direction control, i.e., the purpose of electrothermal refrigeration or heating can reach by the control of input voltage.To avoid driving electricity
The mutation of electric current in road, should also be in the second comparator A5 output one appropriate electric capacity of termination, and to reach smooth electric current, stabilization is warm
The effect of degree.
Referring to accompanying drawing, Vi is the voltage of the second comparator A5 output ends, and V2 is the second NPN triode Q5 and the 2nd PNP tri-
The voltage of pole pipe Q6 emitter stage common port, V3 are the voltage of the second comparator A5 normal phase input ends,
During Vi ＞ V3, V1 is high level, and V2 is low level, and it is from a left side to then flow through the semiconductor cooler TEC senses of current
Right direction；
During Vi ＜ V3, V1 is low level, and V2 is high level, then flows through the TEC senses of current for direction from right to left；
Sample resistance R reflects the electric current I ' for flowing through TEC, and voltage is reduced to I*R, and this voltage drop is put through subtracting amplifier A6
Its big difference, i.e. V3=mRI ', wherein m are multiplication factor.There is Vi=V3 by operational amplifier property V+=V-, so Vi=
MRI ' can regard VCCS as, wherein, transmission function I '/Vi=(1/mR) (A/V).
Constant output current is made using series electric circuit negative feedback structure, there is the spy that can not only freeze but also can heat using TEC
Point, semiconductor refrigerating circuit 25 form mutual symmetry formula voltage-controlled current source, it is provided bidirectional current, and control at any time
Only one works in constant-current source mode, you can reaches requirement.Triode is driven to use Darlington transistor or big work(in circuit
Rate metal-oxide-semiconductor field effect transistor, because the electric current for flowing through power tube is larger, it is necessary to it is fixed on a heat sink, to ensure that they can be
Safety zone works.
Embodiment 3
The present embodiment is based on embodiment 1, is different from part and is, referring to Fig. 6, the multiple-channel output driving control system
Also include delay startup gradually bright drive circuit 300 ', for preventing maloperation moment starts the laser diode from lighting,
Gradually bright drive circuit 300 ' is arranged between double group lithium batteries 100 and first comparator 101 delay startup, double groups of lithium electricity
The input of the output end connection delay startup gradually bright drive circuit 300 ' in pond 100, the output of delay startup gradually bright drive circuit 300 '
The input of end connection first comparator 101.
Laser semiconductor in the moment for starting and closing often due to producing a huge dash current, the electric current
It is enough to damage laser semiconductor, simultaneously because the light source that laser semiconductor is inspired has certain injury to human body, opens
Dynamic moment, which may be because, grasps by mistake or does not pay attention to that the person can be injured, and is designed to the red green gradually increase gradual increment of brightness of delay startup
It can as far as possible reduce and be endangered grasp by mistake caused by, play protection laser semiconductor and safe design.
Referring to Fig. 7, delay startup the first π types that gradually bright drive circuit 300 ' includes being sequentially connected with filter 31 ' circuits, delay net
The π types filter circuit 33 ' of network circuit 32 ' and the 2nd；
The time delay network circuit includes triode Q7 in parallel, the 8th resistance R8, the 4th electric capacity C4, the 5th electric capacity C5, the
Eight electric capacity C8, the 3rd electrochemical capacitor C3 and the 9th electrochemical capacitor C9；The output end of first π types filter circuit 31 ' is as delay net
The input of network circuit 32 ', the input of time delay network circuit 32 ' connect the 8th resistance R8 first end, the 8th resistance R8's
Second end is grounded by the 3rd electrochemical capacitor C3, and the 8th resistance R8 the second end connects the 3rd electrochemical capacitor C3 anode；Delay
The input of lattice network 32 ' connects triode Q7 in parallel colelctor electrode, and triode Q7 in parallel base stage passes through the 5th electric capacity C5
Ground connection, the common port between triode Q7 in parallel base stage and the 5th electric capacity, passes through the resistance of the 4th capacitance connection the 8th
Common port between the anode of second end and the 3rd electrochemical capacitor, triode Q7 in parallel emitter stage pass through the 9th electrolysis electricity
Hold C9 ground connection, triode Q7 in parallel emitter stage is connected with the 9th electrochemical capacitor C9 anode, triode Q7 in parallel emitter stage
It is used as the output end of time delay network circuit 32 ' by the 8th electric capacity C8.
Circuit control principle：Slow turn-on input voltage produces substantial amounts of radio-frequency component in the moment of switch closure, by two
Individual π types filter network has filtered out most of high fdrequency component, and direct current and low frequency component can then pass through.Triode Q7 in parallel its
The major loop and control loop of switch are constituted in fact, and the switch time delay time is mainly by the 8th resistance R8, electric capacity C3, C5, C9 numerical value
Determine, be the 3rd electrochemical capacitor C3 chargings when starting switch electric current pass through the 8th resistance R8 and the 3rd electrochemical capacitor C3, the 3rd
Electrochemical capacitor C3 is in short-circuit conducting state, and the 8th resistance R8 forms closed loop with triode Q7 in parallel, the 5th electric capacity C5, rises
It is in parallel when 3rd electrochemical capacitor C3 and the 5th electric capacity C5 are discharged into balance by triode Q7 in parallel to the effect of delay
When triode Q7 base voltage is reached less than arranges value, main flow electric current realizes conducting, closed loop now by the 8th electric capacity C8
Loop Delay failure.
Laser delays to export, and could must be exported in laser after the completion of phonetic warning by the way of slowly gradually bright.One
Soft starting circuit on kind piece, is encoded with digital circuit to chip system clock, and being converted to step through resistor-type DAC rises
Soft start voltage, and using digital coding overflow position control soft start structure be relatively easy, to work to the conversion of normal condition
Skill, the requirement of device matching are relatively low, and realize and integrated in full sheet.The circuit has been used for the PWM types Buck of a designed, designed
Control chip, to realize the soft start of chip.Reach early warning and prompt facility, also prevent laser hazard effect.
Described above is preferred embodiment of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these are improved and profit
Decorations are also considered as the scope of protection of the utility model.
Claims (9)
1. device is found based on APC and the laser semiconductor material evidence of constant temperature intelligent control, including be coaxially distributed and be sequentially socketed
Optical lens combination structure, cooling mechanism, control system storehouse and battery installation storehouse, it is characterised in that in the control system storehouse
Multiple-channel output driving control system is set, and multiple-channel output driving control system includes being used for the automated power control for exporting stable light
Drive circuit and the intelligent constant-temperature for preventing optical maser wavelength from drifting about control semiconductor cooler circuit.
2. finding device based on APC and the laser semiconductor material evidence of constant temperature intelligent control as claimed in claim 1, its feature exists
In the automated power control drive circuit includes dc source (100), first comparator (101), the electric capacity of order electrical connection
Charge and discharge module (102), constant current source module (103), laser diode (LD), for detecting the laser diode (LD) output light
The photodiode (PD) and backfeed loop module (105) of power, the output end connection first of backfeed loop module (105) are compared
The input of device (101) forms closed circuit, by the luminous power of negative feedback mechanism stabilized lasers diode (LD) so as to defeated
Go out stable light.
3. finding device based on APC and the laser semiconductor material evidence of constant temperature intelligent control as claimed in claim 2, its feature exists
In the constant current source module includes the first operational amplifier, the second operational amplifier, the first triode, the second triode, first
Diode, the second diode, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the first electric capacity and steady
Press diode；
First operational amplifier, its normal phase input end connect the output end of the electric capacity charge and discharge module as the constant current source module
Input, its inverting input connects the first end of the first electric capacity, and the second end of the first electric capacity connects first computing and put
The output end of big device, its output end connect the control terminal of the first triode by first resistor；The control terminal of first triode connects
The anode of voltage-regulator diode is connect, the negative electrode of voltage-regulator diode connects the negative electrode of the first diode, the anode connection of the first diode
The inverting input of first operational amplifier；
First triode, its hot end connection power end, the second resistance that its cold end is used for partial pressure by one connect institute
State output end of the laser diode as the constant current source module；
Second triode, its hot end connect the negative electrode of the voltage-regulator diode, its cold end ground connection, the connection of its control terminal
The first end of second resistance, the second end of second resistance connect the anode of the second diode, the negative electrode connection institute of the second diode
State the inverting input of the first operational amplifier；
The first end connection of second operational amplifier, its normal phase input end and 3rd resistor, its inverting input is respectively with the 3rd
The second end connection of resistance connects with the first end of the 4th resistance, the second end of the 4th resistance and second operational amplifier
Output end connects, and the output end of second operational amplifier passes through the 5th resistance and the described first fortune for being used for defencive function
The inverting input connection of amplifier is calculated, for detecting the output end current of the constant current source module.
4. finding device based on APC and the laser semiconductor material evidence of constant temperature intelligent control as claimed in claim 2, its feature exists
In, the backfeed loop module include current detecting chip, the 3rd operational amplifier, four-operational amplifier, the 6th resistance and
7th resistance, the input of the output end of the photodiode as current detecting chip, the output end of current detecting chip
The normal phase input end of the 3rd operational amplifier is connected, the inverting input of the 3rd operational amplifier connects its output end, the 3rd fortune
The inverting input of the output end connection four-operational amplifier of amplifier is calculated, the normal phase input end of four-operational amplifier passes through
6th resistance connects the output end of four-operational amplifier, and the normal phase input end of four-operational amplifier is connect by the 7th resistance
Ground, the input of the output end of four-operational amplifier as the first comparator.
5. finding device based on APC and the laser semiconductor material evidence of constant temperature intelligent control as claimed in claim 2, its feature exists
In the multiple-channel output driving control system also includes delay startup gradually bright drive circuit, for preventing maloperation moment from starting institute
Laser diode is stated to light,
Gradually bright drive circuit is arranged between the dc source and the first comparator delay startup, the dc source it is defeated
Go out the input of end connection delay startup gradually bright drive circuit, the output end connection described first of delay startup gradually bright drive circuit is compared
The input of device.
6. finding device based on APC and the laser semiconductor material evidence of constant temperature intelligent control as claimed in claim 5, its feature exists
In gradually bright drive circuit includes the first π types filter circuit, time delay network circuit and the 2nd π types being sequentially connected with to the delay startup
Filter circuit；
The time delay network circuit includes triode in parallel, the 8th resistance, the 4th electric capacity, the 5th electric capacity, the 8th electric capacity, the 3rd electricity
Solve electric capacity and the 9th electrochemical capacitor；Input of the output end of the first π type filter circuits as the time delay network circuit,
The input of the time delay network circuit connects the first end of the 8th resistance, and the second end of the 8th resistance passes through the described 3rd
Electrochemical capacitor is grounded, and the second end of the 8th resistance connects the anode of the 3rd electrochemical capacitor；The time delay network circuit it is defeated
Enter the colelctor electrode that end connects the triode in parallel, the base stage of the triode in parallel passes through the 5th capacity earth, the parallel connection
Common port between the base stage of triode and the 5th electric capacity, by the second end of the resistance of the 4th capacitance connection the 8th and described
Common port between the anode of 3rd electrochemical capacitor, the emitter stage of the triode in parallel are connect by the 9th electrochemical capacitor
Ground, the emitter stage of the triode in parallel are connected with the anode of the 9th electrochemical capacitor, the emitter stage of the triode in parallel
It is used as the output end of the time delay network circuit by the 8th electric capacity.
7. finding device based on APC and the laser semiconductor material evidence of constant temperature intelligent control as claimed in claim 1, its feature exists
In the intelligent constant-temperature control semiconductor cooler circuit includes
Thermistor, the environment temperature of laser diode work in device is found for gathering the material evidence, and its output end passes through
One analog to digital conversion circuit connects the input of an one-chip computer；
One-chip computer, its first output end connect semiconductor refrigeration circuit by a D/A converting circuit, its second output
One fan of end connection；
Semiconductor refrigerating circuit, including the second comparator, phase inverter, subtracting amplifier, directing controller, semiconductor cooler and
Sample resistance；Second comparator, the output end that its first input end connects the D/A converting circuit are used as semiconductor system
The input of cold circuit, its first output end connect the input of the directing controller, and the connection one of its second output end is anti-phase
The input of device, the output end of the phase inverter connect the input of the directing controller；Directing controller, its first output
End connects the first input end of the semiconductor cooler, its second output end connects the first end of the sample resistance, described
Second end of sample resistance connects the second input of the semiconductor cooler, there is provided bidirectional current；Subtracting amplifier, it
One input connects the first end of the sample resistance, and its second input connects the second end of the sample resistance, and it is exported
End connects the second input of second comparator, and forming negative feedback mechanism makes the electric current of output constant；
Constant-current source, power supply is provided for thermistor, analog to digital conversion circuit and one-chip computer.
8. finding device based on APC and the laser semiconductor material evidence of constant temperature intelligent control as claimed in claim 7, its feature exists
In the directing controller includes the first NPN triode, the second NPN triode, the first PNP triode and the poles of the 2nd PNP tri-
Pipe,
The base stage of first NPN triode and the first PNP triode connects the output end of second comparator, the first NPN respectively
Triode and the Base-Emitter of the first PNP triode connect the semiconductor cooler, the first NPN triode and first respectively
The colelctor electrode of PNP triode connects power supply respectively；The base stage of second NPN triode and the second PNP triode connects described respectively
The colelctor electrode of the output end of phase inverter, the second NPN triode and the second PNP triode is grounded respectively, the second NPN triode and
The emitter stage of two PNP triodes connects the first end of the sample resistance respectively, described in the second end connection of the sample resistance
Semiconductor cooler.
9. finding device based on APC and the laser semiconductor material evidence of constant temperature intelligent control as claimed in claim 1, its feature exists
In the control system storehouse (13) is interior to be set multiple-channel output driving control system (3) and also set up use on axis (L) in storehouse
In the fan (23) of radiating；The cooling mechanism is multi-through hole radiator (10), on the internal axis (L) of multi-through hole radiator (10)
Laser semiconductor (104) is set, semiconductor cooler (2) is set in the rear end of laser semiconductor (104), in fan (23), more
Laser semiconductor (104) building ring is kept under the multiple heat dissipation cooling effect of through hole radiator (10) and semiconductor cooler (2)
Border temperature prevents optical maser wavelength from drifting about；Optical lens combination structure includes the first optical lens combination structure (11) and neighbouring
The second optical lens combination structure (12) of the cooling mechanism, the first optical lens combination structure (11) is along axis (L) from rear
Biconvex lens (8) and flat glass (9) are set forward, the second optical lens combination structure (12), set from back to front along axis (L)
Put laser facula shaping homogenization lens (5) and aspherical biconvex lens (6,7).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720039704 | 2017-01-13 | ||
| CN2017200397049 | 2017-01-13 |
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| Publication Number | Publication Date |
|---|---|
| CN206710917U true CN206710917U (en) | 2017-12-05 |
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ID=60470594
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720220468.0U Withdrawn - After Issue CN206710917U (en) | 2017-01-13 | 2017-03-08 | Device is found based on APC and the laser semiconductor material evidence of constant temperature intelligent control |
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| CN (1) | CN206710917U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107037840A (en) * | 2017-01-13 | 2017-08-11 | 广州腾德同普光电科技有限公司 | Device is found based on APC and the laser semiconductor material evidence of constant temperature intelligent control |
| WO2022061656A1 (en) * | 2020-09-24 | 2022-03-31 | 深圳市大疆创新科技有限公司 | Laser ranging device |
-
2017
- 2017-03-08 CN CN201720220468.0U patent/CN206710917U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107037840A (en) * | 2017-01-13 | 2017-08-11 | 广州腾德同普光电科技有限公司 | Device is found based on APC and the laser semiconductor material evidence of constant temperature intelligent control |
| CN107037840B (en) * | 2017-01-13 | 2020-04-21 | 广东腾德同普科技股份有限公司 | Laser semiconductor material evidence discovery device based on APC and constant temperature intelligent control |
| WO2022061656A1 (en) * | 2020-09-24 | 2022-03-31 | 深圳市大疆创新科技有限公司 | Laser ranging device |
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