An echo detection multi-tube laser transmission lighting system

Abstract

The invention belongs to the field of lighting technology, and specifically discloses an echo detection multi-tube laser conduction lighting system, including a multi-tube laser conduction lighting system, an echo detection system, a control circuit, a power supply unit and a switch system; optical fiber conduction is adopted to realize photoelectric separation, thereby improving lighting safety issues; transmission excitation is adopted to improve light output efficiency and blue light LD life, and also improve safety; multiple blue light LDs are adopted to effectively improve single-fiber energy, reduce the number of optical fibers, and save construction costs; echo blue light detection is adopted, and a filtering system is adopted at the incident end of the transmission optical fiber to effectively transmit the reflected blue light to the photoelectric element PD, so that the light output condition can be monitored in time and safety is improved; the switch system adopts passive remote switch technology to realize a non-electric control system, which is safer and more convenient to use.

Description

Technical Field

[0001] The invention belongs to the technical field of lighting, and in particular relates to an echo detection multi-tube laser conduction lighting system. Background Art

[0002] Traditional lighting mainly arranges electricity in the area that needs lighting, and then uses a photoelectric conversion chip to convert electrical energy into light, and then uses lighting after the photoelectric conversion is realized. This type of lighting is prone to safety accidents because the photoelectric conversion is performed in the lighting area. Laser light transmission lighting mainly uses remote photoelectric conversion, and then transmits light of a specific wavelength to the place where it is needed through optical fiber, and then uses phosphor technology to convert light of a specific wavelength into the required white light, thereby achieving no electricity in the use area and achieving photoelectric separation.

[0003] Laser light conduction lighting mainly uses light conduction. Since the optical fiber uses quartz optical fiber and the fiber core is small, it may break under the action of external force. After the optical fiber breaks, the entire lighting is in a state of no lighting. If the power is not cut off in time, the light of a specific wavelength will be lit for a long time at the break position, and the break position is in a closed state, and the energy cannot be fully released. In this state for a long time, it is easy to cause overheating. When the heat reaches a certain level, it will damage the entire lighting system. In the case of excessive heat, it will also cause fire or damage surrounding materials. Summary of the invention

[0004] The object of the present invention is to provide an echo detection multi-tube laser transmission lighting system to solve the technical problems existing in the above-mentioned prior art.

[0005] In order to achieve the above-mentioned object, the technical solution of the present invention is: an echo detection multi-tube laser conduction lighting system, comprising a multi-tube laser conduction lighting system, an echo detection system, a control circuit, a power supply unit and a switch system;

[0006] The multi-tube laser conduction lighting system includes a plurality of blue light emitting units, a first transmission optical fiber, a diffusion lens and a fluorescent cap; each blue light emitting unit includes a blue light LD, a shaping lens, a first collimating lens and a reflector; the first transmission optical fiber includes an incident end and an output end, the incident end is provided with a ceramic ferrule APC, and the output end is provided with a ceramic ferrule PC; the blue light emitted by each blue light LD enters the first transmission optical fiber through the shaping lens, the first collimating lens, the reflector and the first filter system respectively, and is transmitted to its output end through the first transmission optical fiber; each reflector reflects the blue light of the corresponding blue light LD to the first filter system and enters the first transmission optical fiber through the first filter system; the inclination angle of the hypotenuse of the blue light incident end of the ceramic ferrule APC is 7 to 9 degrees; the output end of the first transmission optical fiber is provided with a diffusion lens and a fluorescent cap, and the blue light output by the ceramic ferrule PC passes through the diffusion lens and irradiates the fluorescent cap and excites white light;

[0007] The echo detection system includes a first filter system and a first photoelectric element PD. The first filter system can transmit the blue light reflected by the diffusion lens to the first photoelectric element PD, and can also transmit the blue light irradiated by the blue light LD. The blue light reflected by the diffusion lens is reflected by the first filter system to the first photoelectric element PD, and the first photoelectric element PD performs echo detection on the reflected blue light.

[0008] The echo detection system is used to transmit the signal detected by the first photoelectric element PD to the control circuit; after judging according to the blue light echo detection value of the echo detection system, the control circuit outputs a control signal to control the power supply unit to cut off and supply power to the blue light LD; wherein, when the detected blue light echo detection value is not between the first threshold value and the second threshold value, the power supply is controlled to be disconnected, and when the detected blue light echo detection value change rate exceeds the third threshold value, the power supply is controlled to be disconnected;

[0009] The switch system is a passive switch, an active switch or a time-controlled switch; the power supply and power failure of the echo detection multi-tube laser conduction lighting system are realized by controlling the opening and closing of the switch system.

[0010] Further, the passive switch is a first passive switch or a second passive switch.

[0011] Furthermore, the first passive switch includes a first infrared LD, a second collimating lens, a first coupling lens, a second transmission optical fiber, a first switch unit, a second coupling lens and a second photoelectric element PD; the red light emitted by the first infrared LD enters the second transmission optical fiber through the second collimating lens and the first coupling lens, and is transmitted to the first switch unit through the second transmission optical fiber. A first reflecting lens is provided in the first switch unit, and whether the red light of the first infrared LD is reflected on the second photoelectric element PD is controlled by adjusting the angle of the first reflecting lens; when the second photoelectric element PD receives the red light of the first infrared LD, the first passive switch is in an on state, and when the second photoelectric element PD does not receive the red light of the first infrared LD, the first passive switch is in a off state.

[0012] Furthermore, the second passive switch includes a second infrared LD, a second filter system, a third coupling lens, a third transmission optical fiber, a second switch unit and a third photoelectric element PD; the red light emitted by the second infrared LD enters the third transmission optical fiber through the second filter system and the third coupling lens, and is transmitted to the second switch unit through the third transmission optical fiber, and a second reflective lens is provided in the second switch unit, and whether the red light of the second infrared LD is reflected on the third photoelectric element PD is controlled by adjusting the angle of the second reflective lens; when the third photoelectric element PD receives the red light of the second infrared LD, the second passive switch is in an on state, and when the third photoelectric element PD does not receive the red light of the second infrared LD, the second passive switch is in a closed state;

[0013] The second filter system can transmit the red light emitted by the second infrared LD, and can also reflect the red light reflected by the second switch unit to the third photoelectric element PD.

[0014] Furthermore, the active switch is a manual power switch.

[0015] Furthermore, the time switch controls the turning on or off of the power supply by setting the lighting time.

[0016] Furthermore, the diffusion lens is a plano-concave lens with a thickness of 3-5 mm.

[0017] Furthermore, the fluorescent cap is made of silica gel and yellow fluorescent powder, and the length of the fluorescent cap is 15-30 mm and the diameter is 10-20 mm.

[0018] Furthermore, the blue light wavelength of the blue light LD is 450nm±50nm.

[0019] The working principle of the echo detection system of the present invention is that a plano-concave lens is used at the output end of the transmission optical fiber, and the blue light emitted by the blue light LD will generate reflected light through the plano-concave lens, and a filtering system is used at the incident end of the transmission optical fiber to effectively transmit the reflected blue light to the photoelectric element PD, so as to detect the blue light output condition. If the transmission optical fiber is broken, the reflected blue light will form a mutation, and thus the reflected signal will form a mutation, thereby giving an instruction to disconnect the power supply.

[0020] The advantages of the echo detection multi-tube laser transmission lighting system of the present invention are as follows:

[0021] 1. Use optical fiber transmission to achieve photoelectric separation and improve lighting safety.

[0022] 2. The wavelength of blue light is 450nm±50nm, its power is large, and it is transmitted by quartz optical fiber, which increases the transmission distance of optical fiber-conducted lighting. The wavelength of blue light is 450nm±50nm, and the power of a single fiber can reach about 3-5W; the loss value of quartz optical fiber for light with a wavelength of 450nm±50nm is small, and its loss is only about 6% of that of plastic optical fiber, so it can be transmitted over a longer distance.

[0023] 3. The transmission type excitation is adopted to improve the light output efficiency and the life of the blue light LD, and also improve the safety. The output end adopts the diffusion lens to expand the light, so that the light can be dispersed at various angles, thereby dispersing the energy in the spatial angle. The energy received by each unit point is small and the temperature is low, so the silicone material fluorescent cap can be used for excitation; in addition, the use of diffusion lens to expand the light can improve safety. Due to the low unit energy, even if the fluorescent cap falls, it will not cause safety hazards.

[0024] 4. Using ceramic ferrules APC and PC, the laser loss is small and the luminous efficiency is high during laser transmission. When the inclination angle of the hypotenuse of the blue light incident end of the ceramic ferrule APC is 7 to 9 degrees, the luminous efficiency is highest.

[0025] 5. When the thickness of the diffusion lens is 3-5mm, the laser excitation efficiency is the highest.

[0026] 6. The use of multiple blue light LDs can effectively increase the energy of a single fiber, reduce the number of optical fibers, and save construction costs.

[0027] 7. An echo blue light detection system is adopted, and a filtering system is adopted at the incident end of the transmission optical fiber to effectively transmit the reflected blue light to the photoelectric element PD, so as to detect the blue light emission condition. The light emission condition can be monitored in time to improve safety, while also reducing the damage of reflected light to the blue light LD and increasing the life of the blue light LD. In addition, the echo blue light detection system of the present invention has a simple structure and low cost.

[0028] 8. The switch system adopts passive remote switch technology, realizing a non-electric control system, which is safer and more convenient to use. At the same time, time-controlled switches and manual power switches can also be used, which is low cost.

[0029] The echo detection multi-tube laser conduction lighting system of the present invention has the advantages of high light output efficiency, long service life, convenient use, high safety, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of an echo detection multi-tube laser transmission lighting system of the present invention;

[0031] Figure 2 This is a schematic structural diagram of the echo detection multi-tube laser conduction lighting system using the first passive switch of the present invention;

[0032] Figure 3 This is a schematic structural diagram of the echo detection multi-tube laser transmission lighting system using a second passive switch of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure of the echo detection multi-tube laser transmission lighting system using a manual power switch of the present invention;

[0034] Figure 5 The schematic diagram of the structure of the echo detection multi-tube laser transmission lighting system using a time-controlled switch of the present invention. DETAILED DESCRIPTION

[0035] The following is further described in detail through specific implementation methods:

[0036] The figure marks in the drawings of the specification include: 1, blue light LD; 2, shaping lens; 3, first collimating lens; 4, reflector; 5, first transmission optical fiber; 51, ceramic ferrule APC; 52, ceramic ferrule PC; 6, diffusion lens; 7, fluorescent cap; 8, first filtering system; 9, first photoelectric element PD; 10, control circuit; 11, power supply unit; 12, switch system; 13, first infrared LD; 14, second collimating lens; 15, first coupling lens; 16, second transmission optical fiber; 17, first switch unit; 171, first reflective lens; 18, second coupling lens; 19, second photoelectric element PD; 20, second infrared LD; 21, second filtering system; 22, third coupling lens; 23, third transmission optical fiber; 24, second switch unit; 241, second reflective lens; 25, third photoelectric element PD; 26, manual power switch; 27, time-controlled switch.

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] As attached Figure 1 To Attachment Figure 5 As shown: an echo detection multi-tube laser conduction lighting system, including a multi-tube laser conduction lighting system, an echo detection system, a control circuit 10, a power supply unit 11 and a switch system 12; the multi-tube laser conduction lighting system includes a plurality of blue light emitting units, a first transmission optical fiber 5, a diffusion lens 6 and a fluorescent cap 7; each blue light emitting unit includes a blue light LD1, a shaping lens 2, a first collimating lens 3 and a reflector 4; the first transmission optical fiber 5 is a quartz optical fiber, including an incident end and an output end, and the incident end is provided with a ceramic ferrule APC 51, a ceramic ferrule PC52 is provided at the output end; the blue light emitted by each blue light LD1 enters the first transmission optical fiber 5 through the shaping lens 2, the first collimating lens 3, the reflector 4, and the first filter system 8, and is transmitted to its output end through the first transmission optical fiber 5, and the wavelength of the blue light is 450nm±50nm; each reflector 4 reflects the blue light of the corresponding blue light LD1 to the first filter system 8 and enters the first transmission optical fiber 5 through the first filter system 8; the inclination angle of the hypotenuse of the blue light incident end of the ceramic ferrule APC51 is 7 to 9 degrees; a diffusion lens 6 and a fluorescent cap 7 are provided at the output end of the first transmission optical fiber 5, and the blue light output by the ceramic ferrule PC52 passes through the diffusion lens 6 and then irradiates the fluorescent cap 7 and excites white light; the diffusion lens 6 is a plano-concave lens with a thickness of 3-5mm; the fluorescent cap 7 is made of silica gel and yellow fluorescent powder, which is made of silica gel and yellow fluorescent powder according to a certain ratio and made by a mold, and the length of the fluorescent cap 7 is 15-30mm and the diameter is 10-20mm.

[0039] The echo detection system includes a first filter system 8 and a first photoelectric element PD 9. The first filter system 8 can transmit the blue light reflected by the diffusion lens to the first photoelectric element PD 9, and can also transmit the blue light irradiated by the blue light LD 1. The blue light reflected by the diffusion lens 6 is reflected by the first filter system 8 to the first photoelectric element PD 9, and the first photoelectric element PD9 performs echo detection on the reflected blue light.

[0040] The echo detection system is used to transmit the signal detected by the first photoelectric element PD 9 to the control circuit 10; after judging according to the blue light echo detection value of the echo detection system, the control circuit 10 outputs a control signal to control the power supply unit 11 to cut off and supply power to the blue light LD1; wherein, when the detected blue light echo detection value is not between the first threshold value and the second threshold value, the power supply is controlled to be disconnected, and when the detected blue light echo detection value change rate exceeds the third threshold value, the power supply is controlled to be disconnected;

[0041] The switch system 12 is a passive switch, an active switch or a time-controlled switch; the power supply and power-off of the echo detection multi-tube laser conduction lighting system are realized by controlling the opening and closing of the switch system.

[0042] Specifically, the blue light LD 1 , the first photoelectric element PD 9 , the power supply unit 11 and the switch system 12 are connected to the control circuit 10 , respectively.

[0043] Specifically, the passive switch is a first passive switch or a second passive switch; the active switch is a manual power switch 26; and the time switch 27 controls the power on or off by setting the lighting time.

[0044] Example 1

[0045] As attached Figure 2 As shown, the first passive switch includes a first infrared LD 13, a second collimating lens 14, a first coupling lens 15, a second transmission optical fiber 16, a first switch unit 17, a second coupling lens 18 and a second photoelectric element PD 19; the red light emitted by the first infrared LD 13 enters the second transmission optical fiber 16 through the second collimating lens 14 and the first coupling lens 15, and is transmitted to the first switch unit 17 through the second transmission optical fiber 16. A first reflective lens 171 is provided in the first switch unit 17, and whether the red light of the first infrared LD 13 is reflected on the second photoelectric element PD 19 is controlled by adjusting the angle of the first reflective lens 171; when the second photoelectric element PD 19 receives the red light of the first infrared LD 13, the first passive switch 17 is in an on state, and when the second photoelectric element PD 19 does not receive the red light of the first infrared LD 13, the first passive switch is in a closed state.

[0046] Example 2

[0047] As attached Figure 3As shown: the second passive switch includes a second infrared LD 20, a second filter system 21, a third coupling lens 22, a third transmission optical fiber 23, a second switch unit 24 and a third photoelectric element PD25; the red light emitted by the second infrared LD 20 enters the third transmission optical fiber 23 through the second filter system 21 and the third coupling lens 22, and is transmitted to the second switch unit 24 through the third transmission optical fiber 23. A second reflective lens 241 is provided in the second switch unit 24, and whether the red light of the second infrared LD 20 is reflected on the third photoelectric element PD25 is controlled by adjusting the angle of the second reflective lens 241; when the third photoelectric element PD25 receives the red light of the second infrared LD 20, the second passive switch is in an on state, and when the third photoelectric element PD25 does not receive the red light of the second infrared LD 20, the second passive switch is in a closed state;

[0048] The second filter system 21 can transmit the red light emitted by the second infrared LD 20 , and can also reflect the red light reflected by the second switch unit 24 to the third photoelectric element PD 25 .

[0049] Example 3

[0050] The manual power switch 26 realizes the power off and power on of the echo detection multi-tube laser conduction lighting system of the present invention by manually controlling the opening and closing of the switch system. Figure 4 .

[0051] Example 4

[0052] The time switch 27 controls the power on or off by setting the lighting time, as shown in the attached Figure 5 .

[0053] Most of the blue light output by the ceramic ferrule PC52 of the present invention will pass through the diffusion lens 6 for lighting, and a very small part will be reflected back to the transmission optical fiber 5 by the diffusion lens 6. The first filtering system 8 is used at the incident end of the transmission optical fiber 5, which can effectively transmit the reflected blue light to the first photoelectric element PD9, so as to detect the blue light emission. If the transmission optical fiber 5 is broken, the reflected blue light will form a sudden change, and the reflected signal will form a sudden change, so that an instruction to disconnect the power will be given.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0055] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An echo detection multi-tube laser transmission lighting system, characterized in that: It includes a multi-tube laser transmission lighting system, an echo detection system, a control circuit, a power supply unit and a switch system; The multi-tube laser conduction lighting system includes a plurality of blue light emitting units, a first transmission optical fiber, a diffusion lens and a fluorescent cap; each blue light emitting unit includes a blue light LD, a shaping lens, a first collimating lens and a reflector; the first transmission optical fiber includes an incident end and an output end, the incident end is provided with a ceramic ferrule APC, and the output end is provided with a ceramic ferrule PC; the blue light emitted by each blue light LD enters the first transmission optical fiber through the shaping lens, the first collimating lens, the reflector and the first filter system respectively, and is transmitted to its output end through the first transmission optical fiber; each reflector reflects the blue light of the corresponding blue light LD to the first filter system and enters the first transmission optical fiber through the first filter system; the inclination angle of the hypotenuse of the blue light incident end of the ceramic ferrule APC is 7 to 9 degrees; the output end of the first transmission optical fiber is provided with a diffusion lens and a fluorescent cap, and the blue light output by the ceramic ferrule PC passes through the diffusion lens and irradiates the fluorescent cap and excites white light; The echo detection system includes a first filter system and a first photoelectric element PD. The first filter system can transmit the blue light reflected by the diffusion lens to the first photoelectric element PD, and can also transmit the blue light irradiated by the blue light LD. The blue light reflected by the diffusion lens is reflected by the first filter system to the first photoelectric element PD, and the first photoelectric element PD performs echo detection on the reflected blue light. The echo detection system is used to transmit the signal detected by the first photoelectric element PD to the control circuit; after judging according to the blue light echo detection value of the echo detection system, the control circuit outputs a control signal to control the power supply unit to cut off and supply power to the blue light LD; wherein, when the detected blue light echo detection value is not between the first threshold value and the second threshold value, the power supply is controlled to be disconnected, and when the detected blue light echo detection value change rate exceeds the third threshold value, the power supply is controlled to be disconnected; The switch system is a passive switch, an active switch or a time-controlled switch; the power supply and power-off of the echo detection multi-tube laser conduction lighting system are realized by controlling the opening and closing of the switch system; Wherein, the passive switch is a first passive switch or a second passive switch; Among them, the first passive switch includes a first infrared LD, a second collimating lens, a first coupling lens, a second transmission optical fiber, a first switch unit, a second coupling lens and a second photoelectric element PD; the red light emitted by the first infrared LD enters the second transmission optical fiber through the second collimating lens and the first coupling lens, and is transmitted to the first switch unit through the second transmission optical fiber. A first reflective lens is provided in the first switch unit, and whether the red light of the first infrared LD is reflected on the second photoelectric element PD is controlled by adjusting the angle of the first reflective lens; when the second photoelectric element PD receives the red light of the first infrared LD, the first passive switch is in an on state, and when the second photoelectric element PD does not receive the red light of the first infrared LD, the first passive switch is in a off state.

2. The echo detection multi-tube laser transmission lighting system according to claim 1, characterized in that: The second passive switch comprises a second infrared LD, a second filter system, a third coupling lens, a third transmission optical fiber, a second switch unit and a third photoelectric element PD; the red light emitted by the second infrared LD enters the third transmission optical fiber through the second filter system and the third coupling lens, and is transmitted to the second switch unit through the third transmission optical fiber, and a second reflective lens is arranged in the second switch unit, and whether the red light of the second infrared LD is reflected on the third photoelectric element PD is controlled by adjusting the angle of the second reflective lens; when the third photoelectric element PD receives the red light of the second infrared LD, the second passive switch is in an on state, and when the third photoelectric element PD does not receive the red light of the second infrared LD, the second passive switch is in a off state; The second filter system can transmit the red light emitted by the second infrared LD, and can also reflect the red light reflected by the second switch unit to the third photoelectric element PD.

3. The echo detection multi-tube laser transmission lighting system according to claim 1, characterized in that: The active switch is a manual power switch.

4. The echo detection multi-tube laser transmission lighting system according to claim 1, characterized in that: The time switch controls turning on or off the power supply by setting the lighting time.

5. The echo detection multi-tube laser transmission lighting system according to claim 1, characterized in that: The diffusion lens is a plano-concave lens with a thickness of 3-5 mm.

6. The echo detection multi-tube laser transmission lighting system according to claim 1, characterized in that: The fluorescent cap is made of silica gel and yellow fluorescent powder, and has a length of 15-30 mm and a diameter of 10-20 mm.

7. The echo detection multi-tube laser transmission lighting system according to claim 1, characterized in that: The blue light wavelength of the blue light LD is 450nm±50nm.

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