CN216483508U - Laser safety detection circuit, adjusting device and laser system - Google Patents
Laser safety detection circuit, adjusting device and laser system Download PDFInfo
- Publication number
- CN216483508U CN216483508U CN202123241121.XU CN202123241121U CN216483508U CN 216483508 U CN216483508 U CN 216483508U CN 202123241121 U CN202123241121 U CN 202123241121U CN 216483508 U CN216483508 U CN 216483508U
- Authority
- CN
- China
- Prior art keywords
- laser
- light
- module
- light sensing
- sensing device
- 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
Images
Landscapes
- Semiconductor Lasers (AREA)
Abstract
The utility model relates to a laser lighting field, concretely relates to laser safety detection circuit, adjusting device and laser system. The laser safety detection circuit comprises a light sensing module and a control module; the light sensing module comprises a first branch circuit, a second branch circuit, a first light sensing device and a second light sensing device, wherein the first light sensing device is used for converting the laser light in the light beam into an electric signal; the first branch and the second branch are connected to the control module in parallel, the first light sensing device is arranged on the first branch, and an electric signal is input to the control module through the first branch; the second light sensing device is arranged on the second branch and inputs an electric signal to the control module through the second branch; the control module is used for converting the electric signals input by the first light sensing device and the second light sensing device and outputting control electric signals with control information. The utility model discloses effectively avoid leaking laser damage people's eye, improve the security and the reliability of laser illumination.
Description
Technical Field
The utility model relates to a laser illumination field, more specifically relates to a laser safety detection circuit and safety protection system.
Background
In the application of beam illumination, most of the conventional light sources for beam illumination use high-power bulbs, and the light sources of the bulbs play a leading role in beam illumination because the arc of the bulbs is short, the luminous points are small, and the luminous flux per unit area is high. However, the lamp bulb has the problems of low energy efficiency, short service life, mercury pollution and the like, and the uniformity of the center and the edge of a light beam spot is poor.
The development technology of laser lighting is light beam lighting, which can overcome the defects of the traditional light beam lighting, generally, a wavelength converter device is used for converting laser of a laser light source to form light rays with wave bands suitable for lighting characteristics, namely lighting light, however, when emergent light of the laser light source is converged into one point, the energy density is high, the wavelength converter device is easy to burn out, and when the wavelength converter device is damaged, laser leakage is caused, and great potential safety hazards exist. The safety and reliability of the current laser lighting technology still needs to be further improved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a laser safety detection circuit and safety protection system for improve the security and the reliability of laser illumination.
The utility model adopts the following technical scheme:
a laser safety detection circuit comprises a light sensing module and a control module; the light sensing module comprises a first branch circuit, a second branch circuit, a first light sensing device and a second light sensing device, wherein the first light sensing device is used for converting the laser light in the light beam into an electric signal; the first branch and the second branch are connected to the control module in parallel, the first light sensing device is arranged on the first branch, and an electric signal is input to the control module through the first branch; the second light sensing device is arranged on the second branch and inputs an electric signal to the control module through the second branch; the control module is used for converting the electric signals input by the first light sensing device and the second light sensing device and outputting control electric signals with control information.
The final emergent illumination light of laser lighting module is formed by laser and receiving laser mixture, and light sense module is used for receiving the detection illumination light, and its first branch road and second branch road respond to laser in the illumination light and receiving laser respectively, form the signal of telecommunication that carries illumination intensity information and transmit to control module, and control module handles two signal of telecommunication of conversion, finally outputs the control signal of telecommunication. The control electrical signal can influence the load applied to the laser lighting module by the laser driving module, so that the power of the laser lighting module is adjusted or the laser lighting module is turned on or off.
Further, the first light sensing device comprises a first light filter and a first light sensor which only transmit the received laser, and the second light sensing device comprises a second light filter and a second light sensor which only transmit the laser.
Further, the first filter is a filter which only transmits yellow light, and the second filter is a filter which only transmits blue light.
Further, the first branch comprises a first node, a first voltage division unit and a second voltage division unit; one end of the first voltage division unit is used for being connected with a power supply, and the other end of the first voltage division unit is connected with a first node; one end of the second voltage division unit is connected with the first node, and the other end of the second voltage division unit is connected with the control module; one end of the first light sensing device is connected with the first node, and the other end of the first light sensing device is used for being connected with a grounding end; the second branch comprises a second node, a third voltage division unit and a fourth voltage division unit; one end of the third voltage division unit is used for being connected with a power supply, and the other end of the third voltage division unit is connected with a second node; one end of the fourth voltage division unit is connected with the second node, and the other end of the fourth voltage division unit is connected with the control module; one end of the second light sensing device is connected with the second node, and the other end of the second light sensing device is connected with the grounding terminal.
Based on the same inventive concept as the above laser safety detection circuit, the technical scheme adopted by the utility model also includes: a laser safety adjusting device comprises a laser driving module and the laser safety detection circuit; the laser driving module is connected with the control module and used for adjusting the load of the laser lighting module or opening and closing the laser lighting module according to the control electric signal.
Furthermore, the laser driving module comprises a power supply and a laser light source driver; the laser light source driver comprises an input end and an output end; and one end of the power supply is connected with the control module, the other end of the power supply is connected with the input end, and the output end of the power supply is used for being connected with the laser lighting module. Further, the power supply is a direct current power supply.
Further, as one of the alternatives, the laser light source is driven to be a current regulation module, and the load of the laser lighting module is regulated by controlling the output current of the output end.
Further, as one of the alternatives, the laser light source is driven to be a PWM adjusting module, and the load of the laser lighting module is adjusted or the laser lighting module is turned on or off by controlling the output voltage of the output terminal.
Based on the same inventive concept as the above laser safety adjusting device, the technical scheme adopted by the utility model also comprises: a laser system comprises a laser illumination module for emitting illumination light and a laser safety adjusting device as described above; the laser lighting module is connected with the laser driving module; the light sensing module is arranged on a light path of the laser illumination module for emitting illumination light.
Further, the laser illumination module is a transmission type laser module or a reflection type laser module.
Further, the laser lighting module comprises a laser emitting unit emitting laser, a wavelength conversion device arranged on a laser light path and a light emitting lens used for emitting lighting light, and the light sensing module is arranged between the wavelength conversion device and the light emitting lens.
Compared with the prior art, the beneficial effects of the utility model are that: the two branches of the light sensing module respectively and independently detect the laser and the stimulated laser, so that the detection accuracy is improved; laser and the illumination signal that receives the laser are converted into the control signal of telecommunication through control module, the ultimate control signal of telecommunication is influenced to the intensity of two illumination signals, realize according to the laser in the illumination light and the load of receiving the intensity proportion adjustment laser lighting module of laser or open and close the laser lighting module, with extension wavelength conversion device's life, avoid wavelength conversion device in service because local high temperature permanent damage, and avoid causing the injury to the people's eye because of the potential safety hazard that wavelength conversion device burns powder or drops and lead to, reach the guard objective, improve the security and the reliability of laser lighting.
Drawings
Fig. 1 is a schematic circuit diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic view of a laser system according to embodiment 2 of the present invention.
Reference numerals: a control module 11; a direct current power supply 2; a laser light source drive 3; a laser lighting module 4; a first collimating lens 41, a light equalizing diffusion sheet 42; a focusing lens 43; a light-emitting lens 47; a second collimating lens 48; a transmissive phosphor sheet 51.
Detailed Description
The drawings of the present invention are for illustration purposes only and are not to be construed as limiting the invention. For the purpose of better illustrating the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Example 1
The embodiment provides a laser safety detection circuit, which comprises a light sensing module and a control module 11; the light sensing module comprises a first branch, a second branch, a first light sensing device PD1 for converting the light sensing laser in the light beam into an electric signal and a second light sensing device PD2 for converting the laser in the light beam into an electric signal; the first branch and the second branch are connected to the control module 11 in parallel, the first light sensing device PD1 is arranged on the first branch, and an electric signal is input to the control module 11 through the first branch; the second light sensing device PD2 is disposed on the second branch, and inputs an electrical signal to the control module 11 through the second branch; the control module 11 is used for converting the electric signals input by the first light sensing device and the second light sensing device and outputting a control electric signal with control information.
The first light sensing device PD1 includes a first light filter and a first light sensor which only transmit the received laser light, and the second light sensing device PD2 includes a second light filter and a second light sensor which only transmit the laser light. Taking the example that the laser is blue light and the phosphor is yellow phosphor, the received laser is yellow light, the first filter is a filter transmitting only yellow light, and the second filter is a filter transmitting only blue light.
In addition to the first light sensing device PD1, the first branch further includes a first node a1, a resistor R1 and a resistor R2 for voltage division with the first light sensing device PD 1; in addition to the second light sensing device PD2, the second branch further includes a second node a2, a resistor R3 and a resistor R4 for voltage division with the second light sensing device PD 2.
As shown in fig. 1, the first branch and the second branch are connected in parallel to a control module 11, and the control module 11 may be a single chip microcomputer control system, an MCU module, or the like. One end of a resistor R1 of the first branch is connected with the power supply input end, and the other end of the resistor R1 of the first branch is connected with a first node A1; one end of the resistor R2 is connected with the first node A1, and the other end is connected with the control module 11; the first photo-sensing device PD1 has one end connected to the first node a1 and the other end connected to ground. One end of a resistor R3 of the second branch is connected with the power supply input end, and the other end of the resistor R3 of the second branch is connected with a second node A2; one end of the resistor R4 is connected with the second node A2, and the other end is connected with the control module 11; the second photo sensor PD2 has one end connected to the second node a2 and the other end connected to ground.
The first light sensing device PD1 senses the received laser light to generate a reverse current opposite to the current direction of the laser safety detection circuit, that is, an electrical signal corresponding to the received laser light, and the electrical signal is amplified by the resistor R1 and the resistor R2 and transmitted to the control module 11; similarly, the second photo sensor PD2 senses the laser light to generate a reverse current opposite to the current direction of the laser safety detection circuit, that is, an electrical signal corresponding to the laser light, and the electrical signal is amplified by the resistor R3 and the resistor R4 and transmitted to the control module 11; the control module 11 receives the electrical signals of the two branches and outputs a control electrical signal carrying control information according to a specific mapping relationship, where the control information may be embodied as current intensity, frequency, and other conventional technical means in the art of controlling the electrical signal, and the specific mapping relationship is also a conventional technical means by which a person skilled in the art can make adjustments according to a working circuit of the laser driving module, and thus, details are not repeated.
The embodiment also provides a laser safety adjusting device, which comprises a laser driving module and the laser safety detection circuit; the laser driving module is connected with the control module 11 and used for adjusting the load of the laser lighting module 4 or opening and closing the laser lighting module 4 according to the control electric signal.
Specifically, the laser driving module of the present embodiment includes a dc power supply 2 and a laser light source driver 3; the laser light source driver 3 comprises an input end and an output end; one end of the direct current power supply 2 is connected with the control module 11, the other end of the direct current power supply is connected with the input end, and the output end of the direct current power supply is connected with the laser lighting module 4.
The laser light source driver 3 can be a current regulation module or a PWM (pulse width modulation) regulation module, the current regulation module regulates the load of the laser lighting module 4 by controlling the output current of the output end, and the PWM regulation module regulates the load of the laser lighting module 4 or opens and closes the laser lighting module by controlling the output voltage of the output end.
Example 2
The embodiment provides a laser system, which comprises a laser lighting module, a laser driving module and a laser safety detection circuit, wherein the laser lighting module is used for emitting lighting light; the laser driving module is connected with the control module of the laser safety monitoring circuit and the laser lighting module and used for adjusting the load of the laser lighting module or opening and closing the laser lighting module according to the control electric signal, and the laser safety detection circuit is the laser safety detection circuit in the embodiment 1.
The laser lighting module of this embodiment may be a transmissive laser module or a reflective laser module, and specifically, the laser lighting module of this embodiment exemplifies a laser system by taking the transmissive laser module as an example, and includes a laser emitting unit connected to the laser driving module and emitting laser light, a transmissive wavelength conversion device disposed on a laser light path, and an exit lens for emitting illumination light, where the light sensing module is disposed between the wavelength conversion device and the exit lens. The transmission type wavelength conversion device is used for converting part of laser light into stimulated light, and the unconverted laser light and the converted stimulated light are mixed to form illumination light.
The transmission type wavelength conversion device is made of a high-thermal-conductivity light-transmitting material, a fluorescent powder layer capable of converting laser into stimulated light is arranged on the surface of the transmission type wavelength conversion device, a laser beam part incident to the transmission type fluorescent powder sheet 51 is converted into the stimulated light, and the stimulated light and the rest of unconverted laser are mixed to form illumination light which is transmitted outwards.
The laser emission unit includes a laser light source and a focusing element for focusing a light beam emitted from the laser light source to the transmissive phosphor sheet 51, and the focusing element includes a first collimating lens 41, a light-equalizing diffusion sheet 42, and a focusing lens 43.
The laser illumination module further includes a second collimating lens 48 that collects the illumination light emitted by the transmissive wavelength changer.
As shown in fig. 2 (the laser driving module and the laser protection circuit are not shown), the laser light source is a point light source, emitted divergent laser passes through the first collimating and focusing lens 41, is collected and collimated by the first collimating lens 41, passes through the light equalizing and diffusing sheet 42 and reaches the focusing lens 43, the focusing lens 43 focuses the laser beam to the transmission type wavelength conversion device, the phosphor layer of the transmission type wavelength conversion device faces the second collimating lens 48, part of the laser beam is converted into received laser, and the received laser and the remaining unconverted laser are mixed to form illumination light which is transmitted outwards, so that the illumination light reaches the second collimating lens 48 and is collected, the illumination light passes through the second collimating lens 48 and reaches the light emitting lens 47, and the illumination light emits parallel or nearly parallel illumination light through the combined action of the second collimating and focusing lens 48 and the light emitting lens 47. Wherein, the first photo-sensor device PD1 and the second photo-sensor device PD2 of the laser protection circuit are disposed in the area capable of sensing the illumination light, and the first photo-sensor device PD1 and the second photo-sensor device PD2 of the present embodiment are preferably disposed between the second collimating lens 48 and the light-exiting lens 47, and are in the edge position for forming the illumination light spot.
The laser driving module comprises a direct current power supply and a laser light source drive; one end of the direct current power supply is connected with the control module, the other end of the direct current power supply is connected with one end driven by the laser light source, the other end driven by the laser light source is connected with the laser lighting module, and the direct current power supply is used for supplying power for the laser light source according to the opening and closing of the relay.
When the intensity of a laser light source emitted by the laser light source is high, or the working time of the laser lighting module is too long, the local temperature of a fluorescent powder layer on the wavelength conversion device is increased, and the thermal quenching phenomenon of the fluorescent powder occurs, so that the efficiency of converting laser light is reduced, the light sensing device detects that the laser light and the laser light in the lighting light exceed the normal range, the control module controls the output of the direct current power supply, the load of the laser lighting module is adjusted, and the power of the laser light source is reduced or the laser light source is directly turned off.
In this embodiment 2, a transmission type laser module is taken as an example, in other embodiments, the laser module may also be a reflection type laser module, and the laser safety protection system for the reflection type laser module is substantially the same as this embodiment except that the laser is reflected by the wavelength conversion device, and thus, the description thereof is omitted.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not limitations to the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (11)
1. A laser safety detection circuit comprises a light sensing module and a control module; it is characterized in that the preparation method is characterized in that,
the light sensing module comprises a first branch circuit, a second branch circuit, a first light sensing device and a second light sensing device, wherein the first light sensing device is used for converting the laser light in the light beam into an electric signal;
the first branch and the second branch are connected to the control module in parallel,
the first light sensing device is arranged on the first branch circuit and inputs an electric signal to the control module through the first branch circuit;
the second light sensing device is arranged on the second branch and inputs an electric signal to the control module through the second branch;
the control module is used for converting the electric signals input by the first light sensing device and the second light sensing device and outputting control electric signals with control information.
2. The laser safety detection circuit according to claim 1, wherein the first light sensing device includes a first filter and a first light sensor that only transmit the received laser light, and the second light sensing device includes a second filter and a second light sensor that only transmit the laser light.
3. The laser safety detection circuit according to claim 2, wherein the first filter is a filter transmitting only yellow light, and the second filter is a filter transmitting only blue light.
4. The laser safety detection circuit according to any one of claims 1 to 3,
the first branch comprises a first node, a first voltage division unit and a second voltage division unit; one end of the first voltage division unit is used for being connected with a power supply, and the other end of the first voltage division unit is connected with a first node; one end of the second voltage division unit is connected with the first node, and the other end of the second voltage division unit is connected with the control module; one end of the first light sensing device is connected with the first node, and the other end of the first light sensing device is used for being connected with a grounding end;
the second branch comprises a second node, a third voltage division unit and a fourth voltage division unit; one end of the third voltage division unit is used for being connected with a power supply, and the other end of the third voltage division unit is connected with a second node; one end of the fourth voltage division unit is connected with the second node, and the other end of the fourth voltage division unit is connected with the control module; one end of the second light sensing device is connected with the second node, and the other end of the second light sensing device is used for being connected with a grounding end.
5. A laser safety regulating device is characterized in that,
the laser safety detection circuit comprises a laser driving module and the laser safety detection circuit as claimed in any one of claims 1 to 4;
the laser driving module is connected with the control module and used for adjusting the load of the laser lighting module or opening and closing the laser lighting module according to the control electric signal.
6. A laser safety adjustment device according to claim 5,
the laser driving module comprises a power supply and a laser light source driver;
the laser light source driver comprises an input end and an output end;
one end of the power supply is connected with the control module, the other end of the power supply is connected with the input end, and the output end of the power supply is used for being connected with the laser lighting module.
7. Laser safety adjustment device according to claim 6,
the laser light source is driven to be a current adjusting module, and the load of the laser lighting module is adjusted or the laser lighting module is started or stopped by controlling the output current of the output end.
8. Laser safety adjustment device according to claim 6,
the laser light source is driven to be a PWM (pulse-width modulation) adjusting module, and the load of the laser lighting module is adjusted or the laser lighting module is started or stopped by controlling the output voltage of the output end.
9. A laser system, characterized in that,
the laser safety adjusting device comprises a laser lighting module for emitting lighting light and the laser safety adjusting device as claimed in any one of claims 5 to 8;
the laser lighting module is connected with the laser driving module;
the light sensing module is arranged on a light path of the laser illumination module for emitting illumination light.
10. The laser system of claim 9, wherein the laser illumination module is a transmission laser module or a reflection laser module.
11. The laser system of claim 9, wherein the laser illumination module comprises a laser emitting unit for emitting laser light, a wavelength conversion device disposed on a laser path, and an exit lens for emitting illumination light, and the photo-sensing module is disposed between the wavelength conversion device and the exit lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123241121.XU CN216483508U (en) | 2021-12-21 | 2021-12-21 | Laser safety detection circuit, adjusting device and laser system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123241121.XU CN216483508U (en) | 2021-12-21 | 2021-12-21 | Laser safety detection circuit, adjusting device and laser system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216483508U true CN216483508U (en) | 2022-05-10 |
Family
ID=81425396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123241121.XU Active CN216483508U (en) | 2021-12-21 | 2021-12-21 | Laser safety detection circuit, adjusting device and laser system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216483508U (en) |
-
2021
- 2021-12-21 CN CN202123241121.XU patent/CN216483508U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20180187861A1 (en) | Light emitting diode (led) based lighting systems | |
| EP3392549B1 (en) | Light source system and illumination system | |
| KR100468256B1 (en) | Vertical cavity surface emitting laser arrays for illumination | |
| US7633037B2 (en) | Positive temperature coefficient light emitting diode light | |
| KR100750297B1 (en) | LED lighting system using solar cell | |
| CN108535943B (en) | Light source device and projection display system thereof | |
| WO2017138327A1 (en) | Wavelength conversion element and light source device | |
| JP4274536B2 (en) | Semiconductor light emitting device | |
| CN216626137U (en) | Laser protection system and laser safety protection system | |
| CN216483508U (en) | Laser safety detection circuit, adjusting device and laser system | |
| CN211551215U (en) | Electric torch | |
| JP3325012B2 (en) | lighting equipment | |
| JP2020194677A (en) | Photodetector, illumination lighting device, and illumination system | |
| CN217384661U (en) | Laser safety detection system and laser system | |
| KR102629648B1 (en) | Lighting module for a motor vehicle, including a modulated intensity source of coherent light | |
| CN113966024B (en) | Laser adjusting method and device and laser system | |
| CN112212288A (en) | Lighting device and car light lighting system | |
| CN217845402U (en) | Laser monitoring device and laser lighting system | |
| CN210567668U (en) | Refraction type laser white light source | |
| JP2001101901A (en) | Portable light device | |
| KR20140124187A (en) | Lighting apparatus and method of controlling the same | |
| CN220935361U (en) | Intelligent dimming LED system | |
| CN217785038U (en) | Light source module capable of emitting yellow light | |
| CN220570702U (en) | Driving circuit for reducing LED light attenuation | |
| CN217522360U (en) | Laser light source system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |