CN209198313U - A kind of near-infrared receives and launch control unit - Google Patents
A kind of near-infrared receives and launch control unit Download PDFInfo
- Publication number
- CN209198313U CN209198313U CN201822103415.8U CN201822103415U CN209198313U CN 209198313 U CN209198313 U CN 209198313U CN 201822103415 U CN201822103415 U CN 201822103415U CN 209198313 U CN209198313 U CN 209198313U
- Authority
- CN
- China
- Prior art keywords
- amplifier
- voltage
- output end
- input terminal
- interface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Amplifiers (AREA)
Abstract
The utility model provides a kind of near-infrared and receives and launch control unit.It includes power module, transmitting module and receiving module.Power module is inputted using DC9-36V, isolation output DC ± 12V, then is converted to DC+5V by DC+12V, therefore the interference effects such as will not net because of city to next stage in input terminal.Transmitting module uses constant current drive mode, combines amplifier with N-channel MOS pipe, is made comparisons by input voltage with sampling resistor both end voltage, in certain loading range, keeps constant output current.Receiving module is converted into voltage by amplifier in such a way that electric current turns voltage, by the photoelectric current that photodiode generates.Feedback resistance by controlling amplifier can control it to receive the sensitivity of light intensity.Next stage is added sign-changing amplifier and amplifies to voltage.Two-stage linkage is adjusted, and is facilitated and is adjusted sensitivity and amplification factor, so in actual application can be more convenient, and obtained signal is more stable.
Description
Technical field
The utility model relates to biphase gas and liquid flow detection and analog electronics technique field, specifically a kind of near-infrared receivings
Receipts and launch control unit.
Background technique
Infrared technique is chiefly used on infrared carrier wave coding wireless data transmission, and most common is exactly IR remote controller.It is existing
The dependency structure of infrared emission, infrared receiving circuit has been disclosed in many patent applications.Such as: it is infrared transmitting circuit, infrared
It receives circuit and infrared receiving/transmitting system (number of patent application: 201310699015.7) is applied to infrared wireless data and communicates, pass through
Electric energy can be directly changed near infrared light (black light) and radiate by infrared transmitter of the data of serial ports Jing Guo system,
Then infrared signal is received by infrared receiver and complete independently is from infrared receiver to output and Transistor-Transistor Logic level signal compatibility
Signal is suitable for various infra-red remote controls and Infrared data transmission；A kind of amplifying circuit (patent for infrared detection system
Application number: 201711475379.1), the reception amplifying circuit of centering infrared warning is designed；It is a kind of transceiving integrated red
External circuit plate (number of patent application: 201410710503.8) being sent the on-off for controlling signal to control infrared lamp by host computer,
And infrared receiver and transmitting one is made into, a lamp holder is for connecting transmitting tube and reception pipe；A kind of 485 turns of infrared electricity
Road and data transmission method (number of patent application: 201610581236.8) being changed to infrared data for 485 data dress using pure hardware,
Infrared data can be also converted into 485 data.
Circuit in above-mentioned patent application is transmitted using infrared data of doing, and principle is by impulse wave by general
Wavelength is the infrared transmitting tube of 940nm, is converted to optical signal launch and goes out, carrier frequency is based on 38kHz and 40kHz, infrared receiver
By amplification inside IC, -- -- after shaping reduction, the original coding that reduction remote controler provides passes through for filtering -- solution modulation -- for gain
It receives head signal output pin and is input to subsequent code recognition circuit.Coding rule accounts for binary signal " 0 ", a pulse
1.2ms；For binary signal " 1 ", a pulse accounts for 2.4ms, and low level is 0.6ms in each pulse.
In the detection process of biphase gas and liquid flow, often the absorption characteristic based near infrared spectrum measures phase content.
When measurement, make near infrared emission probe transmitting near infrared light, near infrared light is visited after passing through the fluid in pipeline by near-infrared reception
Head is received, and near infrared light can be become by fluid absorption mat energy according to the light intensity that near infrared light is absorbed front and back in pipeline
Change, the phase content of two phase flow can be calculated in conjunction with langbobier law.
Two-phase flow containing rate is measured using the absorption characteristic of near-infrared, the driving that it is still necessary to pop one's head near infrared emission
And the conditioning after near-infrared reception probe received signal makes further research.
Utility model content
The purpose of this utility model is to pass through near-infrared on the device for having measurement vertical pipeline biphase gas and liquid flow flow
It receives and launch control unit, solution pops one's head near infrared emission during using near-infrared measuring two-phase flow containing rate
Driving and receive signal conditioning.Above-mentioned setting can convert optical signals to electric signal by near-infrared receiving transducer.Together
When, the utility model is completed to have power supply disturbance and outside electromagnetic interference outside above-mentioned function by reasonable circuit design
Certain shielding action.
The utility model is realized in this way: a kind of near-infrared receives and launch control unit, including power module, transmitting
Module and receiving module；
The external direct current 9V-36V power supply of power module；The power module includes isolation high-voltage electricity potential source and LDO
Power supply chip, external direct current 9V-36V power supply output+12V, 0V and -12V DC voltage after the isolation high-voltage electricity potential source；
The input terminal connection isolation high-voltage electricity potential source of LDO power supply chip+12V DC output end, the output end of the LDO power supply chip
The DC voltage of output+5V, the LDO power supply chip are used to provide voltage for the driving of light emitting diode；
The transmitting module includes light-emitting diodes interface tube, N-channel MOS pipe and the first two-way amplifier；Light emitting diode
Interface is for connecting light emitting diode, the source electrode of the pin connection N-channel MOS pipe of light-emitting diodes interface tube, light-emitting diodes
It is connected digitally after the sampled resistance of another pin of interface tube；The drain electrode connection isolation high-voltage electricity potential source of N-channel MOS pipe+
12V DC output end, the grid of N-channel MOS pipe connect the output end of the post-amplifier of the first two-way amplifier；First two-way
The pre-amplifier of amplifier connects the output end of LDO power supply chip, inverting input terminal as follower, non-inverting input terminal
Connect with its output end；The non-inverting input terminal of the output end connection post-amplifier of the pre-amplifier of first two-way amplifier,
The ungrounded end of the inverting input terminal connection sampling resistor of post-amplifier；
The receiving module includes photodiode interface, amplifier, potentiometer and first resistor；Photodiode interface
For connecting photodiode, two pins of photodiode interface connect with two input terminals of amplifier respectively, and light
One of pin of electric diode interface connects digitally；Potentiometer and first resistor are arranged in parallel in photodiode interface
Between ungrounded pin and the output end of amplifier；Amplifier is for converting the current into voltage；Photodiode receives light
According to rear generation reverse current, the reverse current is through the meeting after amplifier, potentiometer and first resistor again of photodiode interface
Generate voltage output；The potentiometer is used to adjust the sensitivity that photodiode receives light intensity.
It further includes voltage amplifier circuit that the near-infrared, which is received with launch control unit,；The voltage amplifier circuit includes the
Two two-way amplifiers, bandpass filter and external interface；The pre-amplifier of second two-way amplifier is as follower, same to phase
Input terminal connects with the movable contact of potentiometer in receiving module, and inverting input terminal connects after a resistance with its output end；The
The output end of the pre-amplifier of two two-way amplifiers connects after a resistance with the inverting input terminal of post-amplifier, and rear class is put
The inverting input terminal of big device connects after variable resistance with output end simultaneously, and the non-inverting input terminal of post-amplifier is after a resistance
With digitally connect；The output end of post-amplifier connects through the bandpass filter with external interface.
The bandpass filter includes second resistance, 3rd resistor, first capacitor and the second capacitor；Second two-way amplifier
The output end of post-amplifier sequentially connect after first capacitor and second resistance with the ungrounded pin of external interface, second
The both ends of capacitor connect with two pins of external interface respectively；The grounding pin phase of one end of 3rd resistor and external interface
It connects, the other end connects with the connecting node of first capacitor and second resistance.
In the power module, the one end of external direct current 9V-36V power supply by connection filter capacitor after power switch, filtering
Another termination power ground of capacitor；EMC gas-discharge tube is also parallel at the both ends of filter capacitor.The ungrounded end of filter capacitor
Connect after a fuse with the anode of diode, the cathode of diode after a power inductance with the defeated of high-voltage electricity potential source is isolated
Enter end to connect；Shunt capacitance and decoupling capacitor in parallel are equipped with ground terminal in the input terminal of isolation high-voltage electricity potential source.Described
The both ends of decoupling capacitor are also parallel with transient state zener diode.
970nm can be selected in infrared light-emitting diode in the utility model, and driving circuit is driven using constant-current source；For infrared
The near-infrared shortwave of a length of 780nm-1100nm of line medium wave, the optical wavelength that used photodiode can receive is in 320nm-
Between 1100nm, and faint photoelectric current is generated according to the light intensity received, this faint photoelectric current is subjected to integer amplification,
Amplify shared three-level, first order amplification is adjustable to receive luminous intensity sensitivity, and the band that output voltage can be enhanced in second level amplification carries
Ability can be used as control signal so that external equipment is not limited to A/D converter also, and the electricity after conditioning can be improved in third level amplification
Pressure value.
Device in the utility model is applied in the detection of two-phase flow containing rate, passes through same medium different-thickness pair
The different principle of near infrared absorption tests two phase flow, extracts valuable electric signal, and carry out signal characteristic abstraction, meter
It calculates gaseous phase volume and contains rate, founding mathematical models.Contain rate based on different gaseous phase volumes, in conjunction with the resulting electricity of utility model device
Signal establishes two-phase flow containing rate measure equation, verifies the reasonability and feasibility of utility model device.
Detailed description of the invention
Fig. 1 is the circuit structure block diagram of the utility model.
Fig. 2 is the circuit structure diagram of power module in the utility model.
Fig. 3 is the circuit structure diagram of transmitting module in the utility model.
Fig. 4 is the circuit structure diagram of receiving module in the utility model.
Fig. 5 is voltage amplifier circuit figure in the utility model.
Specific embodiment
The utility model is on the basis of theory analysis and previous work experience, according to photoelectric effect mechanism, to near-infrared
The sent out near infrared light of light emitting diode penetrate two phase flow after photodiode receive light intensity and export electric signal between relationship into
Row design.
It is a circuit board that near-infrared provided by the utility model, which is received with launch control unit overall structure, in circuit
8 channels can be set on plate, be equipped with power module, transmitting module, receiving module, voltage amplifier circuit on circuit boards；Together
When be additionally provided with power interface, power switch, power supply indicator, lightsensitivity adjusting knob, electric signal amplification knob, near-infrared hair
Penetrate probe interface, photodiode receiving transducer interface and electrical signal output interface etc..
The utility model passes through driving infrared light-emitting diode (corresponding near infrared emission probe) and (right to photodiode
Answer near-infrared receiving transducer) reversed photoelectric current progress voltage conversion caused by light intensity is received, realize measurableization of light intensity.Under
Face combines Fig. 1-Fig. 5 to retouch power module, transmitting module, receiving module, voltage amplifier circuit in the utility model in detail
It states.
Fig. 1 is the general frame of the utility model circuit structure.Power module is used for transmitting module, receiving module and electricity
Voltage needed for pressing amplifying circuit to provide, for driving infrared light-emitting diode, infrared light-emitting diode issues close red transmitting module
Two phase flow in outer light irradiation pipeline, near infrared light are received by photodiode after two phase flow is absorbed portion of energy, are received
Photodiode can be received the photoelectric current generated after optical signal and be converted to voltage output by module；Voltage amplifier circuit is for docking
The voltage value for receiving module output amplifies.
Fig. 2 is the circuit structure diagram of power module in the utility model.External power supply SVCC provides DC9- for power module
36V voltage, external power supply SVCC pass through one end of connection filter capacitor C2 after power switch S1, another termination of filter capacitor C2
Power ground OGND passes through filter capacitor C2, it is ensured that external power supply SVCC's is steady.It is parallel at the both ends of filter capacitor C2
EMC gas-discharge tube D2, EMC gas-discharge tube D2 is for protecting entire power module.The pin 1 of EMC gas-discharge tube D2 with
The ungrounded end of filter capacitor C2 connects, and the pin 3 of EMC gas-discharge tube D2 meets power ground OGND, EMC gas-discharge tube D2's
Pin 2 meets the earth PG；High voltage (1KV) capacitor C8, high voltage capacitor are provided between the earth PG and power ground OGND simultaneously
C8 can filter out external interference signal.The ungrounded end of filter capacitor C2 is passing through self-recovery fuse F1 connection diode D1 just
Pole, fuse F1 can disconnect in time power supply when late-class circuit short circuit etc. generates high current, the fuse F1 after circuit is normal
It is automatic to restore, ensure that circuit works normally.Diode D1 can prevent reverse power connection from circuit element being caused to burn.Diode D1
Cathode by power inductance L1 connection shunt capacitance C6 and decoupling capacitor C7, shunt capacitance C6 and decoupling capacitor C7 parallel connection are set
It sets, shunt capacitance C6, decoupling capacitor C7 and power inductance L1 form filter.Wink is also parallel at the both ends of decoupling capacitor C7
The big voltage clamp that state zener diode D3, transient state zener diode D3 can input moment is within the scope of certain voltage.It is other
The both ends of road capacitor C6 and decoupling capacitor C7 are separately connected the input terminal Vin and ground terminal GND of isolation high-voltage electricity potential source U2, and isolation is high
The ground terminal GND connection power ground OGND of piezoelectricity potential source U2.Isolation high-voltage electricity potential source U2 is Width funtion input DC ± 12V output, and
Output DC ± 12V is isolation output, can guarantee that prime interference is not coupled to junior by transmission.Isolation high-voltage electricity potential source U2 has
Three output ends, respectively+Vo, 0V and-Vo；Output end+Vo connection power supply VCC, output+12V DC voltage；Output end-Vo
Connect power supply VEE, output -12V DC voltage；Output end 0V connection digitally DGND exports 0V voltage.In power supply VCC and number
Tantalum capacitor C3 and tantalum capacitor C4, tantalum capacitor C3 and tantalum capacitor C4 in parallel is provided with to word between DGND to play a filtering role.LDO
The input terminal Vin of power supply chip U1 connects power supply VCC by pin 2, and the ground terminal G of LDO power supply chip U1 passes through 1 connection number of pin
The output end vo of word ground DGND, LDO power supply chip U1 connect power supply W-VCC, and the output of LDO power supply chip U1 by pin 3
It holds Vo to export DC5V, provides voltage for the driving of light emitting diode.Be provided between power supply W-VCC and digitally DGND for
There are two branches for the tantalum capacitor C5 of filtering, tantalum capacitor C5 parallel connection, and a branch road is the capacitor C1 played a filtering role, another branch
It is equipped with concatenated resistance R1 and power supply indicator D4, resistance R1 plays metering function, and the cathode of power supply indicator D4 connects number
Ground DGND can show whether power module works normally by the light on and off of power supply indicator D4.
Power module is inputted using DC9-36V in the utility model, isolation output DC ± 12V, then is converted by DC+12V
For DC+5V, will not be netted in this way because of city etc. on interference effects to next step voltage at the input end DC9-36V, and the partial circuit
Consider EMC protection, anti-reverse protection, short-circuit protection etc..
Fig. 3 is the circuit structure diagram of transmitting module in the utility model.The utility model devises constant current driving transmitting electricity
Road.It is shown in Fig. 3 two-way amplifier (i.e. the first two-way amplifier), respectively first via amplifier U3A(is also referred to as prime amplification
Device) and No. second amplifier U3B(be also referred to as post-amplifier), be enhancing driving capability using first via amplifier U3A as following
Device uses.Non-inverting input terminal+the INA of first via amplifier U3A connects power supply W-VCC through pin 1, and power supply W-VCC can provide
DC5V voltage, the inverting input terminal-INA of first via amplifier U3A connect the output end of first via amplifier U3A through pin 8
OUTA, output end OUTA connection pin 7；The power cathode V- of first via amplifier U3A connects digitally DGND through pin 2.The
The positive pole V+ of No. two amplifier U3B connects power supply VCC through pin 6, and power supply VCC can provide+12V DC voltage, the second tunnel
Non-inverting input terminal+the INB of amplifier U3B connects the output end OUTA of first via amplifier U3A, No. second amplifier through pin 3
Inverting input terminal-the INB of U3B connects one end of sampling resistor R6 through pin 4, and another termination of sampling resistor R6 is digitally
DGND.Therefore, for No. second amplifier U3B, non-inverting input terminal+INB is the output of first via amplifier U3A
DC5V, inverting input terminal-INB are the end sampling resistor R6 voltage, constitute comparator in this way.No. second amplifier U3B's is defeated
Outlet OUTB through pin 5 connect N-channel MOS FET pipe Q1(MOSFET pipe abbreviation metal-oxide-semiconductor) grid, N-channel MOS FET pipe Q1's
Drain electrode meets power supply VCC, the pin 1 of the source electrode sending and receiving optical diode interface P1 of N-channel MOS FET pipe Q1, light-emitting diodes interface tube P1
Pin 2 connect sampling resistor R6 ungrounded end.Light-emitting diodes interface tube P1 is used to connect light emitting diode.Work as sampling resistor
When the end R6 voltage is less than DC5V, N-channel MOS FET pipe Q1 is opened, and light emitting diode has electric current to flow through；When load changes, adopt
Sample resistance R6 end voltage is greater than DC5V, and then N-channel MOS FET pipe Q1 is closed, and light emitting diode no current flows through.It is supported on certain model
When enclosing interior variation, constitutes PWM wave driving N-channel MOS FET pipe Q1 just to control the constant of electric current, drive light emitting diode
Electric current is constant.
Transmitting module uses the mode of constant current driving in the utility model, is combined using amplifier with N-channel MOS pipe
Mode, made comparisons by input voltage with sampling resistor R6 both end voltage value, in certain loading range, keep output electricity
That flows is constant.
Fig. 4 is the circuit structure diagram of receiving module in the utility model.P2 is photodiode interface in Fig. 4, is used for
Connect photodiode.Photodiode receives illumination, can generate reversed photoelectric current.U5 is amplifier, is turned using for electric current
Voltage, the reverse current very little that photodiode generates, the bias current and bias voltage of amplifier U5 is very small, meets enough
Conversion accuracy.The pin 1 of photodiode interface P2 connects the pin 3 of amplifier U5, and the pin 2 of photodiode interface P2 connects
Connect the pin 2 of amplifier U5.The pin 3 and pin 2 of amplifier U5 is two input terminals, and the pin 1 and 4 of amplifier U5 is hanging,
Pin 3, pin 5, the pin 8 of amplifier U5 meets digitally DGND, and the pin 6 of amplifier U5 is output end, amplifier U5's
Pin 7 connects power supply VCC, and capacitor C11 is additionally provided between power supply VCC and digitally DGND.Photodiode interface P2's draws
Foot 2 connects one end of capacitor C10, the pin 6 of the other end connection amplifier U5 of capacitor C10.Photodiode interface P2's draws
Foot 2 is also connected with one of fixed contact of potentiometer R2, and another fixed contact of potentiometer R2 is hanging.Capacitor C9 and resistance R3
Parallel connection, and the pin 2 of one end connection photodiode interface P2 of capacitor C9, the other end connection potentiometer R2's of capacitor C9 is dynamic
Contact.One end of the movable contact connection resistance R8 of potentiometer R2, the pin 6 of the other end connection amplifier U5 of resistance R8.Photoelectricity
Diode receives illumination and generates reverse current, and reverse current can generate electricity through feedback resistance potentiometer R2 in parallel with resistance R3
Pressure output.The adjustable photodiode of potentiometer R2 receives the sensitivity of light intensity, i.e., when potentiometer R2 is very big, near-infrared
Transmitting probe understands the appearance of some dead zone phenomenon when irradiating near-infrared receiving transducer.So adjusting potentiometer R2 resistance appropriate
Value can improve the sensitivity for receiving light intensity, if the near infrared light distance to be transmitted, can properly increase the electricity of potentiometer R2
Resistance value.
Fig. 5 is voltage amplifier circuit figure in the utility model.When according to regulate shown in Fig. 4 receive light intensity sensitivity it
Afterwards, the amplifying circuit being made of into next stage rail-to-rail amplifier.Rail-to-rail amplifier be also include two-way amplifier (i.e.
Two two-way amplifiers), respectively first via amplifier U4A(is also referred to as pre-amplifier) and No. second amplifier U4B(be also referred to as rear class
Amplifier).Movable contact of the non-inverting input terminal of first via amplifier U4A through potentiometer R2 in 3 connection figure 4 of pin, the first via are put
The inverting input terminal of big device U4A connects one end of resistance R4 through pin 2, and the other end of resistance R4 connects first via amplifier U4A
Output end, the output end of first via amplifier U4A connects pin 1.The pin 4 of first via amplifier U4A connects power supply VEE,
Power supply VEE can provide -12V DC voltage, and capacitor C14 is provided between power supply VEE and digitally DGND.First via amplifier
The pin 8 of U4A connects power supply VCC, and capacitor C12 is provided between power supply VCC and digitally DGND.First via amplifier U4A
Output end the inverting input terminal of No. second amplifier U4B, the non-inverting input terminal of No. second amplifier U4B are connected after resistance R7
One end of resistance R11, another termination of resistance R11 digitally DGND are connected through pin 5.The pin 4 of No. second amplifier U4B connects
Power supply VEE is met, the pin 8 of No. second amplifier U4B connects power supply VCC.The inverting input terminal of No. second amplifier U4B is through pin
A fixed contact of 6 connection variable resistance R5, another fixed contact of variable resistance R5 is hanging, the dynamic touching of variable resistance R5
Point connects the output end of No. second amplifier U4B through pin 7.The output end of No. second amplifier U4B is also connected with capacitor through pin 7
One end of C13, through the pin 1 of resistance R9 connection external interface P3, the pin 2 of external interface P3 connects the other end of capacitor C13
Digitally DGND.The both ends of capacitor C15 are separately connected the pin 1 and pin 2 of external interface P3.One end connection number of resistance R10
Word ground DGND, the other end are connected at the connecting node of capacitor C13 and resistance R9.Capacitor C13, resistance R10, resistance R9 and capacitor
C15 constitutes bandpass filter.In order to guarantee that the voltage signal of external interface P3 output has certain driving capability, guarantee outer
The signal of portion interface P3 output, which can connect A/D acquisition, also can be used as source driving signal etc., and the utility model is by first via amplifier U4A
It is designed as follower, No. second amplifier U4B is designed as sign-changing amplifier, by adjusting the resistance value size of variable resistance R5,
The size of output voltage values can be adjusted.
Receiving module passes through the photoelectric current that photodiode generates in such a way that electric current turns voltage in the utility model
Amplifier is converted into voltage value.Feedback resistance by controlling the part amplifier can control its sensitivity for receiving light intensity,
The feedback resistance resistance value is bigger, then sensitivity is higher, but resistance value is excessive, it may appear that a part of dead zone, received two pole of photoelectricity
Pipe reverse current saturation.After the photoelectric current that photodiode generates is converted into voltage value by amplifier, next stage is added anti-
To amplifier, which is amplified.Two-stage linkage is adjusted, and is facilitated and is adjusted sensitivity and amplification factor, in this way in reality
Can be more convenient in application process, obtained signal is more stable.
The utility model is measured for the phase content of two phase flow in the device of vertical pipeline biphase gas and liquid flow flow and is provided
The support of experimental provision.Thickness d by changing water in pipeline tests two-phase flow containing rate, by the utility model
Signal condition, extract valuable electric signal, and carry out signal characteristic abstraction, obtain letter using nonlinear transportation method
Number characteristic parameter calculates gaseous phase volume and contains rate, founding mathematical models.The change of the thickness d of water in pipeline, electric signal is stable and declines
Subtract trend also clearly, since utility model device power unit uses isolation technology, fully consider EMC protection,
The interference of noise can be efficiently reduced, so having by the two-phase flow containing rate that acquisition electric signal obtains good credible
Degree, measurement result is more accurate, and such measurement form is more rationally effective.
Claims (6)
1. a kind of near-infrared receives and launch control unit, characterized in that including power module, transmitting module and receiving module；
The external direct current 9V-36V power supply of power module；The power module includes isolation high-voltage electricity potential source and LDO power supply
Chip, external direct current 9V-36V power supply output+12V, 0V and -12V DC voltage after the isolation high-voltage electricity potential source；LDO electricity
Source chip input terminal connection isolation high-voltage electricity potential source+12V DC output end, the LDO power supply chip output end output+
The DC voltage of 5V, the LDO power supply chip are used to provide voltage for the driving of light emitting diode；
The transmitting module includes light-emitting diodes interface tube, N-channel MOS pipe and the first two-way amplifier；Light-emitting diodes interface tube
For connecting light emitting diode, the source electrode of the pin connection N-channel MOS pipe of light-emitting diodes interface tube, light emitting diode is connect
It is connected digitally after the sampled resistance of another pin of mouth；+ the 12V of the drain electrode connection isolation high-voltage electricity potential source of N-channel MOS pipe is straight
Output end is flowed, the grid of N-channel MOS pipe connects the output end of the post-amplifier of the first two-way amplifier；The amplification of first two-way
For the pre-amplifier of device as follower, non-inverting input terminal connects the output end of LDO power supply chip, inverting input terminal and its
Output end connects；The non-inverting input terminal of the output end connection post-amplifier of the pre-amplifier of first two-way amplifier, rear class
The ungrounded end of the inverting input terminal connection sampling resistor of amplifier；
The receiving module includes photodiode interface, amplifier, potentiometer and first resistor；Photodiode interface is used for
Photodiode is connected, two pins of photodiode interface connect with two input terminals of amplifier respectively, and photoelectricity two
One of pin of pole pipe interface connects digitally；Potentiometer and first resistor are arranged in parallel to be connect in the non-of photodiode interface
Between ground pin and the output end of amplifier；Amplifier is for converting the current into voltage；After photodiode receives illumination
Reverse current is generated, which can generate after amplifier, potentiometer and first resistor again through photodiode interface
Voltage output；The potentiometer is used to adjust the sensitivity that photodiode receives light intensity.
2. near-infrared according to claim 1 receives and launch control unit, characterized in that further include voltage amplification electricity
Road；The voltage amplifier circuit includes the second two-way amplifier, bandpass filter and external interface；Before second two-way amplifier
As follower, non-inverting input terminal connects grade amplifier with the movable contact of potentiometer in receiving module, inverting input terminal warp
Connect after one resistance with its output end；The output end of the pre-amplifier of second two-way amplifier amplifies after a resistance with rear class
The inverting input terminal of device connects, and the inverting input terminal of post-amplifier connects after variable resistance with output end simultaneously, and rear class is put
The non-inverting input terminal of big device after a resistance with digitally connect；The output end of post-amplifier is through the bandpass filter and outside
Portion's interface connects.
3. near-infrared according to claim 1 receives and launch control unit, characterized in that external direct current 9V-36V power supply
By connecting one end of filter capacitor, another termination power ground of filter capacitor after power switch；The both ends of filter capacitor also
It is parallel with EMC gas-discharge tube.
4. near-infrared according to claim 3 receives and launch control unit, characterized in that the ungrounded end of filter capacitor
Connect after a fuse with the anode of diode, the cathode of diode after a power inductance with the defeated of high-voltage electricity potential source is isolated
Enter end to connect；Shunt capacitance and decoupling capacitor in parallel are equipped with ground terminal in the input terminal of isolation high-voltage electricity potential source.
5. near-infrared according to claim 4 receives and launch control unit, characterized in that the two of the decoupling capacitor
End is also parallel with transient state zener diode.
6. near-infrared according to claim 2 receives and launch control unit, characterized in that the bandpass filter includes
Second resistance, 3rd resistor, first capacitor and the second capacitor；The output end of the post-amplifier of second two-way amplifier sequentially passes through
Connect after first capacitor and second resistance with the ungrounded pin of external interface, the both ends of the second capacitor respectively with external interface
Two pins connect；One end of 3rd resistor connects with the grounding pin of external interface, the other end and first capacitor and the second electricity
The connecting node of resistance connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822103415.8U CN209198313U (en) | 2018-12-14 | 2018-12-14 | A kind of near-infrared receives and launch control unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822103415.8U CN209198313U (en) | 2018-12-14 | 2018-12-14 | A kind of near-infrared receives and launch control unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209198313U true CN209198313U (en) | 2019-08-02 |
Family
ID=67429112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822103415.8U Active CN209198313U (en) | 2018-12-14 | 2018-12-14 | A kind of near-infrared receives and launch control unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209198313U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270026A (en) * | 2018-12-14 | 2019-01-25 | 河北大学 | A kind of near-infrared receives and launch control unit |
-
2018
- 2018-12-14 CN CN201822103415.8U patent/CN209198313U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270026A (en) * | 2018-12-14 | 2019-01-25 | 河北大学 | A kind of near-infrared receives and launch control unit |
| CN109270026B (en) * | 2018-12-14 | 2023-11-03 | 河北大学 | Near infrared receiving and transmitting control device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209231210U (en) | A kind of adjustable near-infrared of transmission power receives and launch control unit | |
| CN205883172U (en) | Mutual impedance amplifier and relevant integrated circuit and optical receiver | |
| CN107104734A (en) | Light transmitting and receiving system visible under water based on bluish-green laser | |
| CN109270026A (en) | A kind of near-infrared receives and launch control unit | |
| CN209198313U (en) | A kind of near-infrared receives and launch control unit | |
| CN208385834U (en) | Laser diode constant current driving system with modulation | |
| CN105141266A (en) | Photoelectric isolation amplifier of analogue signals | |
| CN108055084A (en) | Optical network signal enhances radiating circuit | |
| CN109374576A (en) | A kind of adjustable near-infrared of transmission power receives and launch control unit | |
| CN203643515U (en) | Transient electromagnetic pulse electric field tester | |
| CN113447750A (en) | Optical device test circuit | |
| CN204631100U (en) | Be applicable to the high-speed light isolation voltage sensor of lightning surge environment | |
| CN210157439U (en) | LED current sampling circuit and LED driving power supply | |
| CN204166094U (en) | A kind of LED photovoltaic parameter measurement system | |
| CN205120534U (en) | Dust detection device | |
| CN105136633A (en) | Pulsed infrared dust concentration detection circuit | |
| EP1653607A4 (en) | Circuit for varying gain of preamplifier | |
| CN209448213U (en) | A kind of drive control device of semiconductor laser | |
| CN108418563A (en) | A kind of feedback control circuit of power amplifier | |
| CN104852277B (en) | A kind of driving circuit for mode of laser group and the laser level with the driving circuit | |
| CN110635799A (en) | Analog signal isolation circuit based on optocoupler | |
| CN204349932U (en) | A kind of simple infrared signal two-stage amplifying circuit | |
| CN103487631B (en) | Modulation-demodulation type current sensor | |
| CN214153419U (en) | Multi-component pulse quantum cascade laser-based driving circuit | |
| CN201226017Y (en) | Apparatus for verifying audio power amplification |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |