CN108124351A - A kind of plumb line coordinator - Google Patents
A kind of plumb line coordinator Download PDFInfo
- Publication number
- CN108124351A CN108124351A CN201711417790.3A CN201711417790A CN108124351A CN 108124351 A CN108124351 A CN 108124351A CN 201711417790 A CN201711417790 A CN 201711417790A CN 108124351 A CN108124351 A CN 108124351A
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- Prior art keywords
- resistance
- operational amplifier
- dual operational
- plumb line
- emitting diode
- Prior art date
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- 230000009977 dual effect Effects 0.000 claims abstract description 41
- 230000005669 field effect Effects 0.000 claims abstract description 20
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 18
- 239000010703 silicon Substances 0.000 claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims abstract description 14
- 230000003287 optical effect Effects 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 230000005611 electricity Effects 0.000 claims description 2
- 238000003384 imaging method Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C15/10—Plumb lines
- G01C15/105—Optical plumbing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Led Devices (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention provides a kind of plumb line coordinators of the constant-current drive circuit using light emitting diode.The plumb line coordinator includes：Parallel light generator, optical filter, imaging sensor, data processing unit, display unit, detection control unit and power supply unit；Wherein, parallel light generator includes LED light source；LED light source is driven by the constant-current drive circuit of light emitting diode；The constant-current drive circuit of light emitting diode includes：Reference voltage source VR1, dual operational amplifier U1, resistance R1, resistance R2, dual operational amplifier U2, capacitor C1, MOS field effect transistor switch/power amplifier tube Q1, silicon NPN pipes Q2, resistance R3, adjustable resistance R0 and light emitting diode D1.The light emitting diode in plumb line coordinator can be driven using above-mentioned constant-current drive circuit using the present invention, avoid super-high-current and cause the damage of LED light source, solve damage problem of the high current to the LED light source of plumb line coordinator.
Description
Technical field
This application involves the structure monitoring technical field in civil engineering more particularly to a kind of perseverances using light emitting diode
Flow the plumb line coordinator of driving circuit.
Background technology
Plumb line coordinator of the prior art group in a manner that CCD technologies are combined using light emitting diode (LED) lamp source
Forming apparatus, it is about position of the vertical silk of 1mm or so under CCD camera lenses to capture diameter, so as to achieve the purpose that displacement measurement.
In the prior art, the LED light source adjustment circuit in plumb line coordinator is typically all using constant pressure source adjustment circuit.
In constant pressure source adjustment circuit in the prior art, generally using red light-emitting diode as LED light source, the red light-emitting two
The voltage regulation limits of pole pipe are generally 2.15V~2.25V, and electric current is 20mA~25mA, and DC power supply passes through regulator block LM317
It powers to light emitting diode (LED).
But it is non-linear due to LED C-V characteristics, even the voltage change of very little may also can trigger it is very big
Curent change in addition burn LED.Moreover, the C-V characteristic of LED is unstable, variation with temperature is changed, so, it is existing
Although the voltage for having the constant pressure source adjustment circuit in technology is stablized, electric current might not be stablized.Therefore, in long-time service shape
When under state, the temperature rise of LED causes electric current under constant pressure to increase, thus light decay is caused to accelerate.
Thus, it can be known that since the point light source in plumb line coordinator of the prior art is powered using constant voltage source,
Point light source in plumb line coordinator is likely to cause the too early light decays of the LED in light source and damage due to electric current is larger, so that
Plumb line coordinator is obtained to break down in use.
The content of the invention
In view of this, the present invention provides a kind of plumb line coordinator, so as to which the constant-current drive circuit is used to drive
Light emitting diode avoids super-high-current and causes the damage of LED light source, solves LED light source of the high current to plumb line coordinator
Damage problem.
What technical scheme was specifically realized in：
A kind of plumb line coordinator, the plumb line coordinator include：Parallel light generator, optical filter, imaging sensor, at data
Manage unit, display unit, detection control unit and power supply unit；
Wherein, the parallel light generator includes LED light source；The LED light source is driven by the constant current of light emitting diode
Circuit drives；
The constant-current drive circuit of the light emitting diode includes：Reference voltage source VR1, dual operational amplifier U1, resistance R1,
Resistance R2, dual operational amplifier U2, capacitor C1, MOS field effect transistor switch/power amplifier tube Q1, silicon NPN pipes Q2, resistance R3, can
Adjust resistance R0 and light emitting diode D1；Wherein, the light emitting diode D1 is the LED light source；
The input terminal Vin of the reference voltage source VR1 is connected with the first power supply, the ground terminal of the reference voltage source VR1
GND is grounded, and the output end vo ut of the reference voltage source VR1 is connected with the first input end of the dual operational amplifier U1；
Ground terminal GND of the one end of the resistance R1 respectively with the first power supply and the reference voltage source VR1 is connected；Institute
The one end of the other end of resistance R1 respectively with the first input end of the dual operational amplifier U1 and the resistance R2 is stated to be connected；
The other end of the resistance R2 is connected with the output terminal of the dual operational amplifier U1；
The output terminal of the dual operational amplifier U1 is connected with the first input end of the dual operational amplifier U2；
The second input terminal of the dual operational amplifier U2 respectively with one end of the capacitor C1, the resistance R3 one
One end connection at end, the emitter of the silicon NPN pipes Q2 and the adjustable resistance R0；The output of the dual operational amplifier U2
The grid respectively with the other end of the capacitor C1 and MOS field effect transistor switches/power amplifier tube Q1 is held to be connected；
The drain electrode of the MOS field effect transistor switches/power amplifier tube Q1 and the cathode of the light emitting diode D1 and described
The collector connection of silicon NPN pipes Q2；The source electrode of the MOS field effect transistor switches/power amplifier tube Q1 respectively with the silicon NPN pipes Q2
Base stage and the resistance R3 the other end connection；
The anode of the light emitting diode D1 is connected with second source VCC；
The other end ground connection of the adjustable resistance R0.
Preferably, the dual operational amplifier U1 and dual operational amplifier U2 is LM358 dual operational amplifiers；
Independent operational amplifier there are two being set in the LM358 dual operational amplifiers.
Preferably, the MOS field effect transistor switches/power amplifier tube Q1 is BSS149 field effect transistor switches.
Preferably, the silicon NPN pipes Q2 is 2n2219 switching transistors.
Preferably, the value of the adjustable resistance R0 is 1000 ohm.
Preferably, the resistance value of the resistance R1 is 10K ohm；
The resistance value of the resistance R2 is 30K ohm；
The resistance value of the resistance R3 is 10K ohm.
Preferably, the capacitance of the capacitor C1 is 153nF.
As above as it can be seen that the constant-current drive circuit of light emitting diode used in plumb line coordinator in the present invention actually
It is a kind of constant current source, it is ensured that constant output current 10mA, current floating are can be controlled in the range of 200 μ A, therefore
It avoids super-high-current and causes the damage of LED light source, so as to solve damage of the high current to the LED light source of plumb line coordinator
Hinder problem.Furthermore it is also possible to by the stable input current of adjustable resistance R0 controls, ensure that the low-power of real meaning uses,
The caloric value and light decay of LED light source are controlled, preferably controls the light decay of plumb line coordinator, extends the service life of LED light source, so as to prolong
The service life of the light source of long plumb line coordinator.
Description of the drawings
Fig. 1 is the structure diagram of the plumb line coordinator in the embodiment of the present invention.
Fig. 2 is the circuit diagram of the constant-current drive circuit of the light emitting diode in the embodiment of the present invention.
Specific embodiment
For technical scheme and advantage is more clearly understood, below in conjunction with drawings and the specific embodiments, to this
Invention is described in further detail.
Fig. 1 is the structure diagram of the plumb line coordinator in the embodiment of the present invention, and Fig. 2 is shining in the embodiment of the present invention
The circuit diagram of the constant-current drive circuit of diode.As depicted in figs. 1 and 2, the plumb line coordinator 20 in the present invention includes：It is flat
Row optical generator 21, optical filter 22, imaging sensor 23, data processing unit 24, display unit 25,26 and of detection control unit
Power supply unit 27；
Wherein, the parallel light generator 21 includes LED light source；The LED light source is driven by the constant current of light emitting diode
Dynamic circuit drives；
The constant-current drive circuit of the light emitting diode includes：Reference voltage source VR1, dual operational amplifier U1, resistance R1,
Resistance R2, dual operational amplifier U2, capacitor C1, MOS field effect transistor switch/power amplifier tube Q1, silicon NPN pipes Q2, resistance R3, can
Adjust resistance R0 and light emitting diode D1；Wherein, the light emitting diode D1 is the LED light source；
The input terminal Vin of the reference voltage source VR1 is connected with the first power supply, the ground terminal of the reference voltage source VR1
GND is grounded, and the output end vo ut of the reference voltage source VR1 is connected with the first input end of the dual operational amplifier U1；
Ground terminal GND of the one end of the resistance R1 respectively with the first power supply and the reference voltage source VR1 is connected；Institute
The one end of the other end of resistance R1 respectively with the first input end of the dual operational amplifier U1 and the resistance R2 is stated to be connected；
The other end of the resistance R2 is connected with the output terminal of the dual operational amplifier U1；
The output terminal of the dual operational amplifier U1 is connected with the first input end of the dual operational amplifier U2；
The second input terminal of the dual operational amplifier U2 respectively with one end of the capacitor C1, the resistance R3 one
One end connection at end, the emitter of the silicon NPN pipes Q2 and the adjustable resistance R0；The output of the dual operational amplifier U2
The grid respectively with the other end of the capacitor C1 and MOS field effect transistor switches/power amplifier tube Q1 is held to be connected；
The drain electrode of the MOS field effect transistor switches/power amplifier tube Q1 and the cathode of the light emitting diode D1 and described
The collector connection of silicon NPN pipes Q2；The source electrode of the MOS field effect transistor switches/power amplifier tube Q1 respectively with the silicon NPN pipes Q2
Base stage and the resistance R3 the other end connection；
The anode of the light emitting diode D1 is connected with second source VCC；
The other end ground connection of the adjustable resistance R0.
In the constant current driver circuit for LED of above-mentioned plumb line coordinator, light emitting diode D1 can be as plumb line coordinator
LED light source (alternatively referred to as LED1)；VCC is the driving voltage source of light emitting diode D1, for ensureing the work of LED in circuit electricity
Pressure；Resistance R1, resistance R2 and resistance R3 are respectively provided with current limliting and partial pressure effect；Capacitor C1 then has filter action；Vs is to pass through
The 10V voltages for the stabilization that circuit obtains；Adjustable resistance R0 is precision resister, and the electric current by adjustable resistance R0 is：I=
Therefore Vs/R0, required electric current is can obtain by the value for adjusting adjustable resistance R0；If for example, required electric current
Size is 10mA, then can adjust adjustable resistance R0 so that the value of adjustable resistance R0 is 1000 ohm.Double computings
Amplifier U1 and dual operational amplifier U2 is used to output burning voltage.Silicon NPN pipes Q2 is a kind of semiconductor device for controlling electric current
Part, effect is that small-signal is zoomed into the larger electric signal of range value, it is also possible to make noncontacting switch.Therefore, the MOS
Field effect transistor switch/power amplifier tube Q1 and silicon NPN pipes Q2 in substance form an on-off circuit.
In addition, preferably, in a specific embodiment of the present invention, the dual operational amplifier U1 and double operation amplifiers
Device U2 can be LM358 dual operational amplifiers；Set that there are two independent, high-gains, interior in the LM358 dual operational amplifiers
The frequency compensated operational amplifier in portion, so as to export burning voltage.
In addition, preferably, in a specific embodiment of the present invention, the MOS field effect transistor switches/power amplifier tube Q1 can be with
It is BSS149 field effect transistor switches.
In addition, preferably, in a specific embodiment of the present invention, the silicon NPN pipes Q2 can be that 2n2219 switchs three poles
Pipe.Its relevant parameter can be 60 volts, 0.8 peace, 0.8 watt.
In addition, preferably, in a specific embodiment of the present invention, the resistance value of the resistance R1 can be 10K ohm；Institute
The resistance value for stating resistance R2 can be 30K ohm；The resistance value of the resistance R3 can be 10K ohm.
In addition, preferably, in a specific embodiment of the present invention, the capacitance of the capacitor C1 can be 153nF.
It in the inventive solutions, can be using the constant-current drive circuit of above-mentioned light emitting diode as vertical line coordinate
The driving circuit of the LED light source of instrument.
Thus, it can be known that the constant-current drive circuit of above-mentioned light emitting diode can be used in plumb line coordinator, to drive
The LED light source in parallel light generator in the plumb line coordinator.The light that the LED light source is sent is radiated on vertical line 30,
The vertical line 30 is imaged on imaging sensor 23, so as to achieve the purpose that displacement measurement.
In conclusion in the inventive solutions, the perseverance of the light emitting diode used in above-mentioned plumb line coordinator
It is actually a kind of constant current source to flow driving circuit, it is ensured that constant output current 10mA, current floating are can be controlled in
It in the range of 200 μ A, therefore avoids super-high-current and causes the damage of LED light source, vertical line is sat so as to solve high current
Mark the damage problem of the LED light source of instrument.Furthermore it is also possible to by the stable input current of adjustable resistance R0 controls, ensure real
The low-power of meaning uses, and controls the caloric value and light decay of LED light source, preferably controls the light decay of plumb line coordinator, extends LED
The service life of light source, so as to extend the service life of the light source of plumb line coordinator.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God and any modification, equivalent substitution, improvement and etc. within principle, done, should be included within the scope of protection of the invention.
Claims (7)
1. a kind of plumb line coordinator, which is characterized in that the plumb line coordinator includes：Parallel light generator, optical filter, image sensing
Device, data processing unit, display unit, detection control unit and power supply unit；
Wherein, the parallel light generator includes LED light source；The LED light source by light emitting diode constant-current drive circuit
Driving；
The constant-current drive circuit of the light emitting diode includes：Reference voltage source VR1, dual operational amplifier U1, resistance R1, resistance
R2, dual operational amplifier U2, capacitor C1, MOS field effect transistor switch/power amplifier tube Q1, silicon NPN pipes Q2, resistance R3, adjustable electric
Hinder R0 and light emitting diode D1；Wherein, the light emitting diode D1 is the LED light source；
The input terminal Vin of the reference voltage source VR1 is connected with the first power supply, and the ground terminal GND of the reference voltage source VR1 connects
Ground, the output end vo ut of the reference voltage source VR1 are connected with the first input end of the dual operational amplifier U1；
Ground terminal GND of the one end of the resistance R1 respectively with the first power supply and the reference voltage source VR1 is connected；The electricity
The one end of the other end of R1 respectively with the first input end of the dual operational amplifier U1 and the resistance R2 is hindered to be connected；
The other end of the resistance R2 is connected with the output terminal of the dual operational amplifier U1；
The output terminal of the dual operational amplifier U1 is connected with the first input end of the dual operational amplifier U2；
The second input terminal of the dual operational amplifier U2 respectively with one end of the capacitor C1, the resistance R3 one end,
One end connection of the emitter and the adjustable resistance R0 of the silicon NPN pipes Q2；The output terminal of the dual operational amplifier U2
The grid with the other end of the capacitor C1 and MOS field effect transistor switches/power amplifier tube Q1 is connected respectively；
Cathode and the silicon NPN of the drain electrode of the MOS field effect transistor switches/power amplifier tube Q1 with the light emitting diode D1
The collector connection of pipe Q2；The source electrode of the MOS field effect transistor switches/power amplifier tube Q1 base with the silicon NPN pipes Q2 respectively
The other end of pole and the resistance R3 connect；
The anode of the light emitting diode D1 is connected with second source VCC；
The other end ground connection of the adjustable resistance R0.
2. plumb line coordinator according to claim 1, it is characterised in that：
The dual operational amplifier U1 and dual operational amplifier U2 is LM358 dual operational amplifiers；
Independent operational amplifier there are two being set in the LM358 dual operational amplifiers.
3. plumb line coordinator according to claim 1, it is characterised in that：
MOS field effect transistor switches/power amplifier tube the Q1 is BSS149 field effect transistor switches.
4. plumb line coordinator according to claim 1, it is characterised in that：
The silicon NPN pipes Q2 is 2n2219 switching transistors.
5. plumb line coordinator according to claim 1, it is characterised in that：
The value of the adjustable resistance R0 is 1000 ohm.
6. plumb line coordinator according to claim 1, it is characterised in that：
The resistance value of the resistance R1 is 10K ohm；
The resistance value of the resistance R2 is 30K ohm；
The resistance value of the resistance R3 is 10K ohm.
7. plumb line coordinator according to claim 1, it is characterised in that：
The capacitance of the capacitor C1 is 153nF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711417790.3A CN108124351A (en) | 2017-12-25 | 2017-12-25 | A kind of plumb line coordinator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711417790.3A CN108124351A (en) | 2017-12-25 | 2017-12-25 | A kind of plumb line coordinator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108124351A true CN108124351A (en) | 2018-06-05 |
Family
ID=62231626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711417790.3A Withdrawn CN108124351A (en) | 2017-12-25 | 2017-12-25 | A kind of plumb line coordinator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108124351A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120074845A1 (en) * | 2010-09-29 | 2012-03-29 | Rohm Co., Ltd. | Automobile led driving device |
| CN207706488U (en) * | 2017-12-25 | 2018-08-07 | 中冶建筑研究总院有限公司 | A kind of plumb line coordinator |
-
2017
- 2017-12-25 CN CN201711417790.3A patent/CN108124351A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120074845A1 (en) * | 2010-09-29 | 2012-03-29 | Rohm Co., Ltd. | Automobile led driving device |
| CN207706488U (en) * | 2017-12-25 | 2018-08-07 | 中冶建筑研究总院有限公司 | A kind of plumb line coordinator |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180605 |
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| WW01 | Invention patent application withdrawn after publication |