CN103167699A - Visible light source with high stability - Google Patents
Visible light source with high stability Download PDFInfo
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- CN103167699A CN103167699A CN2013101047316A CN201310104731A CN103167699A CN 103167699 A CN103167699 A CN 103167699A CN 2013101047316 A CN2013101047316 A CN 2013101047316A CN 201310104731 A CN201310104731 A CN 201310104731A CN 103167699 A CN103167699 A CN 103167699A
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Abstract
The invention discloses a visible light source with high stability. The visible light source with the high stability comprises a power source, a voltage stabilization module, an analogy to digital (AD) module, a digital to analogy (DA) module, an integrated operational amplifier drive circuit, a master control module, a photoelectric sensor and a light emitting diode. After power is turned on, the diode generates visible light with certain intensity. The visible light photoelectric sensor can convert the visible light into electric current or voltage signals, and then the electric current or the voltage signals are output to the master control module after the electric current or the voltage signals are converted through the AD module. The electric current or the voltage signals are compared with preset value after data statistics processing, if input value is larger than the preset value, output is reduced, and otherwise, the output is increased. Stable output currents or voltages are generated after output data is converted through the DA module, and the visible light is generated by using the drive circuit to control the light emitting diode. According to the visible light source with the high stability, fluctuation of output light intensity can be controlled in a minimum scope, thereby infinitesimally influencing a test result, and can satisfy requirements for tests of a majority of visible light signal detection systems.
Description
Technical field
The present invention relates to a kind of light source, particularly a kind ofly the fluctuation of output light intensity can be can be controlled in a high stability visible light source in very low range.
Background technology
All can use the visible light signal detection system in many optoelectronic devices, the quality of signal detection system performance is the performance of the whole equipment of impact directly.An important indicator of evaluation signal detection system performance quality is system signal noise ratio, must provide stable signal source yet will carry out signal to noise ratio test accurately, i.e. stable visible light source.When the signal detection system of high s/n ratio was tested, the faint variation of the intensity of light source all can bring very large impact to test result, and the stability of testing light source intensity has been proposed higher requirement, yet at present general light source stability is relatively poor.
Summary of the invention
For the deficiencies in the prior art, a kind of device that can produce the high-accuracy stable visible light is provided, the fluctuation of its output light intensity can be controlled in a very low range, and is minimum on the test result impact, can satisfy the demand of most of visible light signal detection system tests.
The present invention is achieved by the following technical solutions: a kind of high stability visible light source, comprise the power supply, drive circuit and the light-emitting device that connect successively, also comprise control module, the output of described control module is connected with the control end of drive circuit, the output of power supply is connected power input with the power input of control module respectively and is connected with drive circuit, described control module is used for gathering the visible light that light-emitting device sends, and adopts degenerative mode to regulate the brightness of light-emitting device.
a kind of high stability visible light source according to claim 1, described control module comprises the first Voltage stabilizing module, the AD module, main control module and photoelectric sensor, described power supply respectively with the input of the first Voltage stabilizing module, the power input of AD module, the power input of main control module is connected power input and is connected with drive circuit, the reference voltage input of described the first Voltage stabilizing module and AD module, the visible light that described photoelectric sensor sends light-emitting device is converted to the current/voltage signal, the AD module is input in main control module after with the number conversion of current/voltage signal mode and processes, through after data statistics processing with main control module in preset value compare, input value is greater than preset value, reduce the output of main control module, otherwise increase main control module output, main control module can be controlled light-emitting device by controlling drive circuit.
Further, described control module can be carried out the highest 2000 secondary data collections and regulation output luminous intensity in 1ms.
Further, also comprise the DA module, the power input of described DA module is connected with power supply, the reference voltage input of DA module is connected with the output of the first Voltage stabilizing module, described DA module is carried out the conversion of digital-to-analogue piece with the output signal of main control module, the output of DA module is connected with the control end of drive circuit, controls drive circuit driving light-emitting device luminous.
Further, described drive circuit is the integrated transporting discharging drive circuit.
Further, described light-emitting device is light-emitting diode.
Further, described control module also comprises the second Voltage stabilizing module, and the output of power supply is connected by the second Voltage stabilizing module with the power input of main control module.
Useful technique effect of the present invention: photoelectric sensor is converted to the current/voltage signal with visible light, after AD module analog-to-digital conversion, is input to main control module, compare with preset value through after data statistics processing, input value reduces output greater than preset value, otherwise increases output.The present invention adopts the mode of negative feedback control, and the output visible light signal is gathered, and after comparing with preset value, regulates the output of light according to the size and Orientation of comparative result, and the output intensity of light source is fluctuateed in a very low range, and stability is strong.
Other advantages of the present invention, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on being apparent to those skilled in the art to investigating hereinafter, perhaps can be instructed from the practice of the present invention.
Description of drawings
In order to make purpose of the present invention, technical scheme and beneficial effect clearer, the invention provides following accompanying drawing and describe:
Fig. 1 is apparatus of the present invention structure chart.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
As shown in Figure 1, a kind of high stability visible light source, comprise the power supply, drive circuit and the light-emitting device that connect successively, also comprise control module, the output of described control module is connected with the control end of drive circuit, the output of power supply is connected power input with the power input of control module respectively and is connected with drive circuit, described control module is used for gathering the visible light that light-emitting device sends, and adopts degenerative mode to regulate the brightness of light-emitting device.Control module can be carried out 2000 secondary data collections and regulation output luminous intensity in 1ms, satisfy the demand of high speed signal detection system test.
described control module comprises the first Voltage stabilizing module, the AD module, main control module and photoelectric sensor, described power supply respectively with the input of the first Voltage stabilizing module, the power input of AD module, the power input of main control module is connected power input and is connected with drive circuit, the reference voltage input of described the first Voltage stabilizing module and AD module, the visible light that described photoelectric sensor sends light-emitting device is converted to the current/voltage signal, the AD module is input in main control module after with the number conversion of current/voltage signal mode and processes, through after data statistics processing with main control module in preset value compare, input value is greater than preset value, reduce the output of main control module, otherwise increase main control module output, main control module can be controlled light-emitting device by controlling drive circuit.Described drive circuit is the integrated transporting discharging drive circuit, and light-emitting device is light-emitting diode.
Also comprise the DA module, the power input of described DA module is connected with power supply, the reference voltage input of DA module is connected with the output of the first Voltage stabilizing module, described DA module is carried out the conversion of digital-to-analogue piece with the output signal of main control module, the output of DA module is connected with the control end of drive circuit, controls drive circuit driving light-emitting device luminous.The first Voltage stabilizing module not only plays the effect of a voltage stabilizing, also provides a reference voltage for AD module and DA module.
Described control module also comprises the second Voltage stabilizing module, and the output of power supply is connected by the second Voltage stabilizing module with the power input of main control module.Provide a stable working power to main control module, make it not be subjected to the impact of external signal.
After device powers on, light-emitting diode produces the visible light of some strength, photoelectric sensor is converted to the current/voltage signal with visible light, after AD module analog-to-digital conversion, be input to main control module, compare with preset value through after data statistics processing, input value is greater than preset value, reduce output, otherwise increase output.Produce stable output current/voltage after the digital-to-analogue conversion of output data process DA module, control light-emitting diode by drive circuit.
The present invention adopts the mode of negative feedback control, the output visible light signal is gathered, after comparing with preset value, regulate the output of light according to the size and Orientation of comparative result, the output intensity of light source is fluctuateed in a very low range, guarantee the stability of output, can satisfy the demand of high s/n ratio test.In addition, the present invention also has following characteristics, and 1, can according to signal detection system performance and testing requirement, select AD, the DA module of different accuracy; 2, signal acquisition periods reaches nanosecond, can carry out 2000 secondary data collections in 1ms.
Explanation is at last, above preferred embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is described in detail by above preferred embodiment, but those skilled in the art are to be understood that, can make various changes to it in the form and details, and not depart from claims limited range of the present invention.
Claims (7)
1. high stability visible light source, comprise the power supply, drive circuit and the light-emitting device that connect successively, it is characterized in that: also comprise control module, the output of described control module is connected with the control end of drive circuit, the output of power supply is connected power input with the power input of control module respectively and is connected with drive circuit, described control module is used for gathering the visible light that light-emitting device sends, and adopts degenerative mode to regulate the brightness of light-emitting device.
2. a kind of high stability visible light source according to claim 1, it is characterized in that: described control module comprises the first Voltage stabilizing module, the AD module, main control module and photoelectric sensor, described power supply respectively with the input of the first Voltage stabilizing module, the power input of AD module, the power input of main control module is connected power input and is connected with drive circuit, described the first Voltage stabilizing module is connected with the reference voltage input of AD module, the visible light that described photoelectric sensor sends light-emitting device is converted to the current/voltage signal, the AD module is input in main control module after with the number conversion of current/voltage signal mode and processes, through after data statistics processing with main control module in preset value compare, input value is greater than preset value, reduce the output of main control module, otherwise increase main control module output, main control module can be controlled light-emitting device by controlling drive circuit.
3. a kind of high stability visible light source according to claim 2, it is characterized in that: described control module can be carried out the highest 2000 secondary data collections and regulation output luminous intensity in 1ms.
4. a kind of high stability visible light source according to claim 2, it is characterized in that: also comprise the DA module, the power input of described DA module is connected with power supply, the reference voltage input of DA module is connected with the output of the first Voltage stabilizing module, described DA module is carried out the conversion of digital-to-analogue piece with the output signal of main control module, the output of DA module is connected with the control end of drive circuit, controls drive circuit driving light-emitting device luminous.
5. a kind of high stability visible light source according to claim 2, it is characterized in that: described drive circuit is the integrated transporting discharging drive circuit.
6. a kind of high stability visible light source according to claim 2, it is characterized in that: described light-emitting device is light-emitting diode.
7. a kind of high stability visible light source according to claim 2, it is characterized in that: described control module also comprises the second Voltage stabilizing module, the output of power supply is connected by the second Voltage stabilizing module with the power input of main control module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101047316A CN103167699A (en) | 2013-03-28 | 2013-03-28 | Visible light source with high stability |
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| CN2013101047316A CN103167699A (en) | 2013-03-28 | 2013-03-28 | Visible light source with high stability |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569706A (en) * | 2013-10-15 | 2015-04-29 | 广西鑫百纳电气有限公司 | Signal injection adjusting device and signal injection device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090218960A1 (en) * | 2007-03-13 | 2009-09-03 | Renaissance Lighting, Inc. | Step-wise intensity control of a solid state lighting system |
| CN201412709Y (en) * | 2009-06-04 | 2010-02-24 | 河北奥冠通信科技有限公司 | Intelligent energy-saving illuminating system |
| US20110109249A1 (en) * | 2009-11-10 | 2011-05-12 | Green Mark Technology Inc. | Dimmable led lamp and dimmable led lighting apparatus |
| CN102209410A (en) * | 2010-03-29 | 2011-10-05 | 深圳新飞通光电子技术有限公司 | External sudden automatic optical-power control circuit |
-
2013
- 2013-03-28 CN CN2013101047316A patent/CN103167699A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090218960A1 (en) * | 2007-03-13 | 2009-09-03 | Renaissance Lighting, Inc. | Step-wise intensity control of a solid state lighting system |
| CN201412709Y (en) * | 2009-06-04 | 2010-02-24 | 河北奥冠通信科技有限公司 | Intelligent energy-saving illuminating system |
| US20110109249A1 (en) * | 2009-11-10 | 2011-05-12 | Green Mark Technology Inc. | Dimmable led lamp and dimmable led lighting apparatus |
| CN102209410A (en) * | 2010-03-29 | 2011-10-05 | 深圳新飞通光电子技术有限公司 | External sudden automatic optical-power control circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569706A (en) * | 2013-10-15 | 2015-04-29 | 广西鑫百纳电气有限公司 | Signal injection adjusting device and signal injection device |
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Application publication date: 20130619 |