CN102967552A - Multi-light-source multi-duct biochemical detection luminescence control circuit - Google Patents
Multi-light-source multi-duct biochemical detection luminescence control circuit Download PDFInfo
- Publication number
- CN102967552A CN102967552A CN2012104527950A CN201210452795A CN102967552A CN 102967552 A CN102967552 A CN 102967552A CN 2012104527950 A CN2012104527950 A CN 2012104527950A CN 201210452795 A CN201210452795 A CN 201210452795A CN 102967552 A CN102967552 A CN 102967552A
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- control
- microprocessor
- current converter
- 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.)
- Pending
Links
Images
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention relates to a multi-light-source multi-duct biochemical detection luminescence control circuit. The circuit comprises a power supply, light-emitting diodes i (LEDs i) of ducts, a control microprocessor, a voltage and current conversion circuit, a driving device and a path selection circuit, wherein the output of the control microprocessor is connected with the voltage and current conversion circuit; the output end of the voltage and current conversion circuit is connected with the trigger end of the driving device; the output end of the driving device is connected with a total port of the path selection circuit, and the other end of the driving device is connected with a negative pole of the power supply through a current-limiting resistor R3; the control output end of the control microprocessor is connected with a control input port of the path selection circuit; and a signal input port of the path selection circuit is connected with the negative pole of the LED i of each duct. The circuit provided by the invention can be used for controlling the operating states of the LEDs and the sizes of the driving currents of the LEDs, and the LEDs are intelligently driven through the control microprocessor so as to realize sequential working of light sources of the ducts, therefore, the power consumption is reduced, and the service lives of the LEDs are prolonged.
Description
Technical field
The invention belongs to the medical science photoelectric detecting technology, mainly is that spectrophotometric method is carried out multiple light courcess multi-pore channel biochemistry detection field, is specifically related to a kind of multiple light courcess multi-pore channel biochemistry detection emission control circuit.
Background technology
Related biochemistry detection is optical detection substantially in the modern medical service check, take fluorometry and spectrophotometric method as main.Wherein normal operation tungsten lamp and deuterium lamp are as light source in the spectrophotometric method, and signals collecting is to carry out according to the frequency of setting in the biochemical test, and light source is can only work to get final product in gatherer process in fact.But biochemistry detection is very high to the stability requirement of light source, in order to guarantee that the general light source of light source stability all is normal bright state, tungsten lamp and deuterium lamp power up the shinny initial stage can not be stable, therefore these light sources must be normal bright state in the process of detection of dynamic, can guarantee although it is so the light of stable output, but cost also is very obvious, thermal value is large, power consumption is high, and is aging serious.
Therefore now a lot of equipment have adopted light emitting diode (LED) as detection light source and since light emitting diode have stable luminescence, low in energy consumption, thermal value is little, be difficult for aging characteristic thereby be subjected to modern photoelectricity research staff's approval.
But smaller owing to the LED luminous quantity, a plurality of LED so the multi-pore channel testing circuit must be arranged in pairs or groups.And light-emitting mode also is normal bright state.Like this a plurality of LED can current sinking, and the more power consumptions in duct are larger, are unfavorable for very much the application of low-power consumption and handheld device.In the past multi-pore channel led light source drives design: such as Fig. 1, the multi-pore channel light source driving circuit is connected in parallel on the positive and negative two ends of power supply, driving circuit be designed to the positive and negative two ends that a current-limiting resistance and LED are serially connected in power supply.Design in the past is that the LED in all ducts all works, and Acquisition Circuit collects the light signal in all ducts in the database in a short period of time one by one, the defective of this design be the LED in each duct constantly all at normal bright state, and size of current can not be adjusted.For this reason for increasing optical device serviceable life and reducing the problem that power consumption needs to be resolved hurrily with regard to becoming engineers.
Summary of the invention
The purpose of patent of the present invention is to overcome the deficiencies in the prior art, by adopting the method for dynamic driving light emitting diode, provides a kind of multiple light courcess multi-pore channel biochemistry detection emission control circuit.
Patent of the present invention solves its technical matters and takes following technical scheme to realize:
A kind of multiple light courcess multi-pore channel biochemistry detection emission control circuit, comprise power supply and be connected in parallel on each duct light emitting diode LEDi between the power supply, i is arbitrary integer, innovative point of the present invention is: also further include the control microprocessor, voltage-current converter circuit, driving element and path are selected circuit, the voltage signal output end of control microprocessor is connected with the voltage-current converter circuit input end, the voltage-current converter circuit output terminal is connected with the signal trigger end of driving element, output terminal one end of driving element selects total port of circuit to be connected with path, the other end is connected with power cathode by current-limiting resistance R3, simultaneously, control microprocessor-based control output terminal selects the control inputs port of circuit to be connected with path, and path selects the signal input port of circuit to be connected with the negative pole of each duct light emitting diode LEDi.
And, between the voltage signal output end of controlling microprocessor and voltage-current converter circuit input end, be connected with filtering circuit.
And, it is the microprocessor of ADuC848 that described control microprocessor adopts model, the control microprocessor internal is integrated with digital analog converter DAC, and the output of digital analog converter DAC is connected with voltage-current converter circuit, or is connected with voltage-current converter circuit by filtering circuit.
And described voltage-current converter circuit is that to adopt model be the change-over circuit that the integrated operational amplifier of OP07 is barricaded as.
And it is the field effect transistor of IRLL014 that described driving element adopts model.
And, what described channel selection circuit adopted is that model is the multichannel analog switch of 74HC4051, its total port connects the source electrode of driving element, 8 independent signal input ports connect respectively the negative pole of 8 LED 1-LED8, and the control inputs port of analog switch is connected to control microprocessor-based control output terminal.
Advantage and the good effect of patent of the present invention are:
1, the circuit of the present invention duty that can control LED can be controlled again size and the brightness of LED drive current simultaneously, can make the LED not only can stabilized illumination but also can reduce power consumption and working time, thereby improves the serviceable life of LED.
2, the present invention has studied the performance of light emitting diode, be the nanosecond rank to stable luminescence from power on, therefore in a short period of time just can be from unglazed arrival stabilized illumination state, so we utilize control microprocessor intelligence driving LED, have realized the high-intelligentization of controlling.
Description of drawings
Fig. 1 is the electrical schematic diagram of original multiple light courcess multi-pore channel illuminating circuit;
Fig. 2 is the electrical schematic diagram of multiple light courcess multi-pore channel biochemistry detection emission control circuit of the present invention.
Embodiment
Below in conjunction with accompanying drawing patent working example of the present invention is further described: it is emphasized that embodiments of the invention are illustrative, rather than determinate, can not be with present embodiment as the restriction to patent of the present invention.
Design concept of the present invention is:
Design of the present invention is to gather and driving circuit carries out work and switching simultaneously, drives simultaneously this paths of LEDs and carry out luminously when system gathers single duct light signal, and when signals collecting arrived next duct, the LED in this duct quit work.Be exactly that to only have a duct LED under the synchronization in the multi-pore channel be duty on the whole, other duct is holding state, idle.The more energy-saving effects in duct are more obvious, and power consumption is original 1/N.
Implementation of the present invention is as follows:
A kind of multiple light courcess multi-pore channel biochemistry detection emission control circuit, comprise the VDD power supply and be connected in parallel on each duct light emitting diode LEDi between the power supply, i is the integer of 1-8, innovative point of the present invention is: also further include the control microprocessor, voltage-current converter circuit, driving element and path are selected circuit, the voltage signal output end of control microprocessor is connected with the voltage-current converter circuit input end, the voltage-current converter circuit output terminal is connected with the signal trigger end of driving element, output terminal one end of driving element selects total port of circuit to be connected with path, the other end is connected with the VDD power cathode by current-limiting resistance R3, simultaneously, control microprocessor-based control output terminal selects the control inputs port of circuit to be connected with path, and path selects the signal input port of circuit to be connected with the negative pole of each duct light emitting diode LEDi.
In implementation of the present invention, between voltage signal output end and the voltage-current converter circuit input end of control microprocessor, be connected with filtering circuit, filtering circuit is a RC filtering circuit, this circuit is used for the interference voltage that elimination DAC exports.
In implementation of the present invention, it is the microprocessor of ADuC848 that the control microprocessor adopts model, inner integrated digital analog converter DAC, exportable small-signal variable voltage, the output of digital analog converter DAC is connected with voltage-current converter circuit, or is connected with voltage-current converter circuit by filtering circuit, as shown in Figure 2, the two ends of crystal oscillator Y1 are connected on the XTAL1 and XTAL2 of control microprocessor, and are connected to power cathode by capacitor C 6, C7; RESET is connected with positive source by capacitor C 8, and is connected to power cathode by resistance R 4; DVDD is connected on the DGND by capacitor C 9; DVDD is connected with positive source, and DVDD is connected with power cathode; PSEN is connected to power cathode by resistance R 5; EA is connected to positive source by resistance R 6.
In implementation of the present invention, voltage-current converter circuit is that to adopt model be the change-over circuit that the integrated operational amplifier of OP07 is barricaded as, potentiometer RPot1 is connected to the adjustment port of integrated operational amplifier, the adjustable side of simulation potentiometer RPot 1 is connected on the node between power supply+6V and the capacitor C 3, the negative input of integrated operational amplifier is connected on the node between driving element and the current-limiting resistance R3, the positive input of integrated operational amplifier is connected with filtering circuit, receive the voltage signal that the control microprocessor sends, the output terminal of integrated operational amplifier is through resistance R 2 outputs.The effect of this circuit is that the voltage signal that DAC inputs is converted to current signal.
In implementation of the present invention, it is the field effect transistor of IRLL014 that driving element adopts model, and the grid of field effect transistor is connected with resistance R 2, and the source electrode connecting path is selected total port of circuit, the negative input of drain electrode contact resistance R3 and integrated operational amplifier.The effect of this device is the size that drives and control electric current between source electrode and the drain electrode by the control of grid current size, thus control LED luminosity.
In implementation of the present invention, what channel selection circuit adopted is that model is the multichannel analog switch of 74HC4051, its total port connects the source electrode of driving element, 8 independent signal input ports connect respectively the negative pole of 8 LED 1-LED8, and the control inputs port EN of analog switch, A, B, C are connected on control microprocessor-based control output terminal P0.0, P0.1, P0.2, the P0.3 port.The effect of this circuit is by microprocessor the switching controls of analog switch passage to be realized that selectivity drives single LED i.
Principle of work of the present invention and step are:
⑴ power up for whole circuit;
⑵ control microprocessor is adjusted the channel selecting loop LED 1 and the source electrode of driving element is connected;
⑶ control microprocessor output DAC magnitude of voltage;
⑷ voltage signal is converted to current signal through voltage-current converter circuit, drives driving element;
⑸ driving element drives the LED1 that connects and lights;
⑹ light process and continue the 125ms time (light emitting diode can at this moment between arrive the stable luminescence state) carries out light signal collection to light emitting diode this moment;
⑺ control microprocessor output DAC value is the 0V magnitude of voltage after the sampling;
⑻ control microprocessor is adjusted the source electrode connection that channel selection circuit switches to next loop LED 2 and driving element;
⑼ control microprocessor is again exported DAC and is driven.
By that analogy, as long as grasp acquisition interval and acquisition time, light emitting diode and silicon photocell just can use with the utilization factor of 1/N, and do not affect the efficient of sample collection.
Claims (6)
1. multiple light courcess multi-pore channel biochemistry detection emission control circuit, comprise power supply and be connected in parallel on each duct light emitting diode LEDi between the power supply, i is arbitrary integer, it is characterized in that: also further include the control microprocessor, voltage-current converter circuit, driving element and path are selected circuit, the voltage signal output end of control microprocessor is connected with the voltage-current converter circuit input end, the voltage-current converter circuit output terminal is connected with the signal trigger end of driving element, output terminal one end of driving element selects total port of circuit to be connected with path, the other end is connected with power cathode by current-limiting resistance R3, simultaneously, control microprocessor-based control output terminal selects the control inputs port of circuit to be connected with path, and path selects the signal input port of circuit to be connected with the negative pole of each duct light emitting diode LEDi.
2. multiple light courcess multi-pore channel biochemistry detection emission control circuit according to claim 1 is characterized in that: be connected with filtering circuit between the voltage signal output end of controlling microprocessor and voltage-current converter circuit input end.
3. multiple light courcess multi-pore channel biochemistry detection emission control circuit according to claim 1 and 2, it is characterized in that: it is the microprocessor of ADuC848 that described control microprocessor adopts model, the control microprocessor internal is integrated with digital analog converter DAC, the output of digital analog converter DAC is connected with voltage-current converter circuit, or is connected with voltage-current converter circuit by filtering circuit.
4. multiple light courcess multi-pore channel biochemistry detection emission control circuit according to claim 1 is characterized in that: described voltage-current converter circuit is that to adopt model be the change-over circuit that the integrated operational amplifier of OP07 is barricaded as.
5. multiple light courcess multi-pore channel biochemistry detection emission control circuit according to claim 1 is characterized in that: it is the field effect transistor of IRLL014 that described driving element adopts model.
6. multiple light courcess multi-pore channel biochemistry detection emission control circuit according to claim 1, it is characterized in that: what described channel selection circuit adopted is that model is the multichannel analog switch of 74HC4051, its total port connects the source electrode of driving element, 8 independent signal input ports connect respectively the negative pole of 8 LED 1-LED8, and the control inputs port of analog switch is connected to control microprocessor-based control output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104527950A CN102967552A (en) | 2012-11-13 | 2012-11-13 | Multi-light-source multi-duct biochemical detection luminescence control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104527950A CN102967552A (en) | 2012-11-13 | 2012-11-13 | Multi-light-source multi-duct biochemical detection luminescence control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102967552A true CN102967552A (en) | 2013-03-13 |
Family
ID=47797842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104527950A Pending CN102967552A (en) | 2012-11-13 | 2012-11-13 | Multi-light-source multi-duct biochemical detection luminescence control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102967552A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114390751A (en) * | 2021-12-27 | 2022-04-22 | 深圳市共进电子股份有限公司 | LED drive circuit and LED subassembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006172806A (en) * | 2004-12-14 | 2006-06-29 | Koito Mfg Co Ltd | Lighting control circuit of vehicular lighting fixture |
| CN101598667A (en) * | 2009-07-27 | 2009-12-09 | 国家***第二海洋研究所 | The multi-excitation multi-emission wavelength underwater in-situ organic matter fluorescence automatic detector |
| JP2010099113A (en) * | 2008-10-21 | 2010-05-06 | Hidekazu Yanai | Lighting control device and moving model having the same |
| CN102056370A (en) * | 2009-10-30 | 2011-05-11 | 捷扬光电股份有限公司 | Light source electric power control method and system for projector using light-emitting diode light source |
| CN202353895U (en) * | 2011-12-14 | 2012-07-25 | 长春赛诺迈德医学技术有限责任公司 | Microplate reader made by using LED (Light Emitting Diode) as light source |
-
2012
- 2012-11-13 CN CN2012104527950A patent/CN102967552A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006172806A (en) * | 2004-12-14 | 2006-06-29 | Koito Mfg Co Ltd | Lighting control circuit of vehicular lighting fixture |
| JP2010099113A (en) * | 2008-10-21 | 2010-05-06 | Hidekazu Yanai | Lighting control device and moving model having the same |
| CN101598667A (en) * | 2009-07-27 | 2009-12-09 | 国家***第二海洋研究所 | The multi-excitation multi-emission wavelength underwater in-situ organic matter fluorescence automatic detector |
| CN102056370A (en) * | 2009-10-30 | 2011-05-11 | 捷扬光电股份有限公司 | Light source electric power control method and system for projector using light-emitting diode light source |
| CN202353895U (en) * | 2011-12-14 | 2012-07-25 | 长春赛诺迈德医学技术有限责任公司 | Microplate reader made by using LED (Light Emitting Diode) as light source |
Non-Patent Citations (1)
| Title |
|---|
| 刘东红: "利用单片机89C52的一个并行I/O口实现多个LED显示的一种简单方法", 《国外电子元器件》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114390751A (en) * | 2021-12-27 | 2022-04-22 | 深圳市共进电子股份有限公司 | LED drive circuit and LED subassembly |
| CN114390751B (en) * | 2021-12-27 | 2024-05-10 | 深圳市共进电子股份有限公司 | LED drive circuit and LED assembly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102497695A (en) | LED linear constant current control circuit and LED linear circuit | |
| TW200638320A (en) | Control circuit for balancing current and method thereof | |
| CN106205504A (en) | A kind of LED backlight light adjusting system | |
| CN202602987U (en) | LED linear driving circuit suitable for silicon controlled light modulator | |
| CN102665324A (en) | LED linear driving circuit applicable to thyristor dimmer and control method | |
| CN101835308B (en) | Led lamp control circuit and led lamp | |
| CN202353874U (en) | Light emitting diode (LED) linear constant-current control circuit and LED linear circuit | |
| CN102811527A (en) | LED frequency-variable marker lamp and control circuit and control method of marker lamp | |
| CN202886258U (en) | Multi-light-source multi-duct illumination control circuit | |
| CN102967552A (en) | Multi-light-source multi-duct biochemical detection luminescence control circuit | |
| CN202998609U (en) | Led constant current dimming power supply | |
| CN204929321U (en) | LED drive circuit of multichannel independent control | |
| CN202172519U (en) | Discharge circuit for solving problem of surplus brightness after switching off of LED lamp | |
| CN201238410Y (en) | LED solar streetlight controller | |
| CN103091634A (en) | Battery level indicating circuit and indicating device and lamp | |
| CN105246212A (en) | Novel LED (Light Emitting Diode) dimming circuit | |
| CN202634813U (en) | Color-temperature-adjustable light-emitting diode (LED) lamp circuit | |
| CN203537605U (en) | LED multi-path current sharing circuit | |
| CN104080226B (en) | A kind of circuit controlling triode switch according to sample rate current | |
| CN202101074U (en) | Composite LED (light emitting diode) voice-controlled lighting lamp | |
| CN202077234U (en) | Dimmable LED (Light-Emitting Diode) energy-saving lamp | |
| CN202035180U (en) | Signal lamp circuit and signal lamp | |
| CN201623897U (en) | LED current control device | |
| CN201995176U (en) | LED lighting drive circuit | |
| CN202075354U (en) | Detection device for burst mode of laser |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130313 |