阅读说明：本技术 一种光开关装置、照明系统 (Optical switch device and lighting system ) 是由 张航 陆建东 马慧玲 葛燕妮 朱瓒 陈利春 于 2019-09-20 设计创作，主要内容包括：一种光开关装置、照明系统,属于光开关技术领域。装置包括弹簧开关,反射镜,传输光纤,倏逝波模块,光纤接头插芯,光纤上、下固定板；传输光纤经倏逝波模块连接光纤接头插芯,光纤接头插芯容置于光纤上、下固定板之间,光纤上、下固定板两者的前端未封闭而形成有开口；光纤接头插芯正对开口且间隔一定距离设置,当弹簧开关未被按下时,光线经光纤接头插芯向开口处射出；反射镜设于弹簧开关底部且设于光纤上固定板其靠近开口的位置；当弹簧开关被按下时,反射镜封闭开口,光线经由光纤上、下固定板与反射镜三者形成的密闭空间返回传输光纤。本发明实现了易燃易爆物储藏空间的断电,材料更节约,结构更简单。(An optical switch device and an illumination system belong to the technical field of optical switches. The device comprises a spring switch, a reflector, a transmission optical fiber, an evanescent wave module, an optical fiber joint inserting core and an optical fiber upper and lower fixing plate; the transmission optical fiber is connected with an optical fiber joint inserting core through an evanescent wave module, the optical fiber joint inserting core is contained between the optical fiber upper fixing plate and the optical fiber lower fixing plate, and the front ends of the optical fiber upper fixing plate and the optical fiber lower fixing plate are not sealed to form an opening; the optical fiber connector inserting core is opposite to the opening and arranged at a certain distance, and when the spring switch is not pressed down, light rays are emitted to the opening through the optical fiber connector inserting core; the reflector is arranged at the bottom of the spring switch and is arranged at the position, close to the opening, of the optical fiber upper fixing plate; when the spring switch is pressed down, the reflector closes the opening, and light returns to the transmission optical fiber through the closed space formed by the optical fiber upper and lower fixing plates and the reflector. The invention realizes the power failure of the inflammable and explosive storage space, saves more materials and has simpler structure.)

1. An optical switch device is characterized by comprising a spring switch, a reflector, a transmission optical fiber, an evanescent wave module, an optical fiber joint inserting core, an optical fiber upper fixing plate and an optical fiber lower fixing plate; the transmission optical fiber is connected with an optical fiber joint inserting core through an evanescent wave module, the optical fiber joint inserting core is arranged between the optical fiber upper fixing plate and the optical fiber lower fixing plate, and the front end of the optical fiber upper fixing plate and the front end of the optical fiber lower fixing plate are not sealed to form an opening; the optical fiber connector insertion core is arranged opposite to the opening and has a certain distance with the opening, and when the spring switch is not pressed down, light rays are emitted to the opening through the optical fiber connector insertion core; the reflector is arranged at the bottom of the spring switch and is arranged at the position, close to the opening, of the optical fiber upper fixing plate; when the spring switch is pressed down, the reflector closes the opening, the optical fiber upper fixing plate, the optical fiber lower fixing plate and the reflector form a closed space, and light returns to the transmission optical fiber from the closed space.

2. An optical switching device according to claim 1, wherein the transmission fiber comprises a transmitting fiber for transmitting laser light and a receiving fiber for receiving return light.

3. An optical switching device according to claim 2, wherein the evanescent wave module comprises a coating layer, two evanescent wave units arranged in parallel in the optical fiber cladding; the evanescent wave unit comprises an inner layer of optically dense medium and an outer layer of optically sparse medium; the two evanescent wave units are respectively connected with the transmitting optical fiber and the receiving optical fiber.

4. An optical switch according to claim 1, characterized in that said spring switch comprises a direct-type or rotary spring switch.

5. An optical switching device according to claim 1, wherein said mirror comprises a planar or curved mirror; and a reflecting film or a fluorescent coating is arranged on the surface of the reflector.

6. An illumination system, characterized in that it comprises an optical switching device, a laser coupling device, a detector, a control module, a terminal device according to any one of claims 2 to 5; the laser coupling device transmits laser to the optical switch device through a transmitting optical fiber; the detector is used for detecting the light returned by the light switch device through the receiving optical fiber; when the detector detects the light return, the detector sends a detection signal to the control module, and the control module controls the working state of the terminal equipment.

7. An illumination system according to claim 6, wherein said laser coupling means comprises a laser, a fiber coupler; the laser emitted by the laser is coupled into the emitting optical fiber through the optical fiber coupler.

8. An illumination system according to claim 7, characterized in that the laser comprises a pulsed laser or a continuous laser.

9. An illumination system according to claim 8, characterized in that the detector comprises an illuminance sensor or a wavelength sensor.

10. An illumination system according to claim 8, wherein the terminal device is one of a light guide device and a fiber optic device using an optical fiber as a working medium.

Technical Field

The invention relates to the technical field of optical switches, in particular to an optical switch device and an illumination system.

Background

The prior optical circuit switch structure is based on an electric switch mode, but the application environment of the switch is different, and the optical circuit switch has a plurality of difficulties and requirements in application. For example, in a warehouse where flammable and explosive materials are stored, electric sparks are liable to cause explosion. Dust and moisture cause short circuit to the switch. In this environment, a switching device having high sealing performance should be used. In addition, the switch housing takes the explosion-proof strength into consideration, and the water-proof, moisture-proof and explosion-proof properties of the wire leading-out head into consideration.

Specifically, the existing optical circuit switch structure is classified into a direct type optical fiber switch, an indirect type optical fiber switch, and a general type launch type switch. Direct type optical fiber switch: when the switch button is pressed by hand, the blocking sheet blocks the light path, the light circuit is blocked, the light path is not on, and the output end controls the power supply to be disconnected; when the hand leaves the button, the light path is switched on again, so that the output end can detect the change of the signal, and then sends out a control signal. Indirect fiber switch: when the switch is pressed down, the optical fiber deforms, the total reflection condition is destroyed, and the light energy output by the optical fiber is reduced, so that the detection device can send out a control signal and the power supply is disconnected. In a word, the existing optical switch needs to be connected with a light-emitting light source end, the length of an optical fiber needs to be longer, the material loss is large, and the installation is more complex. When the button is pressed, the reflector on the button enables the emitted light to be emitted back to the emitting optical fiber, so that the receiving optical fiber cannot receive the optical signal, a receiving diode outside a place does not receive the optical signal, and the optical path is disconnected.

The utility model CN201820067352.2 discloses a small optical fiber sensing system based on evanescent waves, and specifically discloses a system comprising a power supply module, a light source module, an optical fiber coupler, an optical fiber probe, an optical coupling system, a photoelectric conversion module and a sampling module; the exciting light emitted by the light source module is used for exciting the fluorescent substance modified on the optical fiber probe to obtain a fluorescent signal, the signal light passing through the optical fiber coupler and the optical coupling system is received and converted into an electric signal by the photoelectric conversion module, and then the electric signal is sampled and processed by the sampling module. The system adopts evanescent waves to realize accurate measurement of the concentration (such as pH value and metal ion concentration) of various substances, but cannot solve the problem of optical loop switches.

Disclosure of Invention

The invention provides an optical switch device and an illumination system aiming at the problems in the prior art, realizes the power failure of a flammable and explosive storage space, saves more materials and has a simpler structure.

The invention is realized by the following technical scheme:

the invention provides an optical switch device, which comprises a spring switch, a reflector, a transmission optical fiber, an evanescent wave module, an optical fiber joint inserting core, an optical fiber upper fixing plate and an optical fiber lower fixing plate, wherein the spring switch is arranged on the upper surface of the optical fiber; the transmission optical fiber is connected with an optical fiber joint inserting core through an evanescent wave module, the optical fiber joint inserting core is arranged between the optical fiber upper fixing plate and the optical fiber lower fixing plate, and the front end of the optical fiber upper fixing plate and the front end of the optical fiber lower fixing plate are not sealed to form an opening; the optical fiber connector insertion core is arranged opposite to the opening and has a certain distance with the opening, and when the spring switch is not pressed down, light rays are emitted to the opening through the optical fiber connector insertion core; the reflector is arranged at the bottom of the spring switch and is arranged at the position, close to the opening, of the optical fiber upper fixing plate; when the spring switch is pressed down, the reflector closes the opening, the optical fiber upper fixing plate, the optical fiber lower fixing plate and the reflector form a closed space, and light returns to the transmission optical fiber from the closed space.

The invention fully utilizes the advantages of using light as the illumination medium and optical fiber transmission, realizes the power failure of the storage space of the inflammable and explosive materials, saves more materials and has simpler structure; by utilizing evanescent wave coupling and detecting the reflected fluorescence, the receiving optical fiber is shorter and saves more materials.

Preferably, the transmission fiber includes a transmitting fiber for transmitting the laser light, and a receiving fiber for receiving the return light.

Preferably, the evanescent wave module comprises a coating layer and two evanescent wave units arranged in parallel in the optical fiber cladding layer; the evanescent wave unit comprises an inner layer of optically dense medium and an outer layer of optically sparse medium; the two evanescent wave units are respectively connected with the transmitting optical fiber and the receiving optical fiber.

Preferably, the spring switch comprises a direct-type or rotary spring switch.

Preferably, the mirror comprises a planar or curved mirror; and a reflecting film or a fluorescent coating is arranged on the surface of the reflector.

An illumination system comprises the optical switch device, a laser coupling device, a detector, a control module and terminal equipment; the laser coupling device transmits laser to the optical switch device through a transmitting optical fiber; the detector is used for detecting the light returned by the light switch device through the receiving optical fiber; when the detector detects the light return, the detector sends a detection signal to the control module, and the control module controls the working state of the terminal equipment.

Preferably, the laser coupling device comprises a laser and a fiber coupler; the laser emitted by the laser is coupled into the emitting optical fiber through the optical fiber coupler.

Preferably, the laser comprises a pulsed laser or a continuous laser.

Preferably, the detector comprises an illuminance sensor or a wavelength sensor.

Preferably, the terminal device is one of a light guide device and an optical fiber device using an optical fiber as a working medium.

The invention has the following beneficial effects:

the invention provides an optical switch device and an illumination system:

1. the electric constraint is eliminated, and the characteristic of high safety is highlighted. The problems that the electric wire is likely to leak electricity under a high-voltage environment and the room for storing inflammable and explosive substances is not easy to be electrified are mainly solved;

2. by using evanescent wave coupling technology, the design is simple, the sensitivity is high, the length of the receiving optical fiber is shorter than that of the optical fiber in the prior art, and the material is saved.

3. The reflector technology of laser irradiation coating phosphor powder, the structure is simpler.

Drawings

FIG. 1 is a schematic view of an optical switch device (in a state where a spring switch is not pressed) according to the present invention;

FIG. 2 is a schematic diagram of an evanescent wave module of an optical switching apparatus according to the present invention;

fig. 3 is a system block diagram of an illumination system of the present invention.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

Referring to fig. 1, an optical switch apparatus according to the present invention includes a spring switch, a mirror 44, a transmission fiber (not shown), an evanescent wave module 3, a fiber stub insert 45, an optical fiber upper fixing plate 481, and an optical fiber lower fixing plate 482. The transmission optical fiber is connected to the optical fiber connector insert 45 through the evanescent wave module 3, the optical fiber connector insert 45 is accommodated in a space between the optical fiber upper fixing plate 481 and the optical fiber lower fixing plate 481, and both the front end of the optical fiber upper fixing plate 481 and the front end of the optical fiber lower fixing plate 482 are not closed to form an opening 483. The optical fiber connector insert 45 is disposed opposite to the opening 483 and has a certain distance with the opening 483. The reflector 44 is disposed at the bottom of the spring switch and on the fiber fixing plate 481 near the opening 483. When the spring switch is not pressed down, light is emitted to the opening through the optical fiber connector inserting core 45. When the spring switch is pressed, the reflecting mirror 44 closes the opening, the optical fiber upper fixing plate 481, the optical fiber lower fixing plate 483 and the reflecting mirror 44 form a closed space, and return light returns to the transmission optical fiber from the closed space.

The spring switch comprises a direct type or rotary type spring switch. Specifically, the spring switch includes a button 41, a spring fixing plate 42, and a spring 43. The spring fixing plate 42 and the spring 43 are disposed in the lower space of the button 41. One end of the spring 43 is connected to the bottom of the spring fixing plate 42, and the other end is connected to the top of the reflector 44. Meanwhile, the top of the reflector 44 is limited to the lower portion of the button 41, i.e., the lower portion of the button is provided with a button guide groove allowing the reflector to move in a vertical direction under the spring pressure. The bottom of the reflector 44 is connected to the optical fiber upper fixing plate 481. The optical fiber upper fixing plate 481 is provided with a fixing plate guide groove which allows the reflecting mirror 44 to move in a vertical direction under a spring pressure. When the top of the button 41 is pressed, the reflecting mirror 44 moves down to the fiber lower fixing plate 482. At this time, the opening 483 is closed.

The reflector includes a planar or curved reflector. When the surface of the reflector is provided with a reflecting film or a fluorescent coating, laser irradiates on the reflector coated with the fluorescent powder to excite the fluorescent powder to generate fluorescence and generate reflection to return along the optical fiber.

The transmission optical fiber includes a transmitting optical fiber for transmitting laser light, and a receiving optical fiber for receiving return light. The light outlet end of the transmitting optical fiber and the light inlet end of the receiving optical fiber are connected to the same side of the evanescent wave module 3.

Referring to fig. 2, the evanescent wave module includes a coating 33 and two evanescent wave units disposed in parallel in the cladding 33 of the coated fiber. The evanescent wave unit comprises an inner layer of optically dense medium 32 and an outer layer of optically sparse medium 31. The two evanescent wave units are respectively connected with the transmitting optical fiber and the receiving optical fiber. Evanescent coupling refers to coupling between two evanescent waves physically superposed with each other, and specifically, one optically denser medium 31 is sandwiched between two optically denser media 32, and the energy of an optical wave in one optically denser medium can be coupled into the other optically denser medium by the coupling effect of the evanescent wave in the optically denser medium 31. The reflected light is coupled by evanescent waves, and the light energy is reduced.

The optical fiber connector core insert is a connector core insert composed of an FC connector and a UPC core insert, or a connector core insert composed of an FC connector and an APC core insert, or a connector core insert composed of an LC connector and a UPC core insert, or a connector core insert composed of an LC connector and an APC core insert.

The transmitting optical fiber and the receiving optical fiber are both multimode optical fibers; or, the transmitting optical fiber and the receiving optical fiber are both single-mode optical fibers; or one of the transmitting optical fiber and the receiving optical fiber is a multimode optical fiber, and the other is a single mode optical fiber.

Referring to fig. 3, an illumination system comprises the optical switch arrangement (including evanescent wave module 3 and reflected light switch 4), a laser coupling arrangement, a detector 6, a control module 7, and a terminal device. The laser coupling device transmits laser light to the optical switching device via a transmitting optical fiber 8. The detector 6 is used to detect the light returned by the light switch device via the receiving optical fiber 9. When the detector 6 detects the light return, the detector 6 sends a detection signal to the control module 7, and the control module 7 controls the working state of the terminal equipment. The reflected light switch 4 includes a spring switch and a mirror in the optical switch device.

The laser coupling device comprises a laser 1 and a fiber coupler 2. The laser emitted by the laser is coupled into the emitting optical fiber through the optical fiber coupler. The laser comprises a pulse laser or a continuous laser, and the laser emitted by the laser is one of red light, green light, blue light and white light. The detector includes an illuminance sensor or a wavelength sensor. The terminal equipment is one of a light guide device and an optical fiber device which take optical fibers as working media, and is preferably a laser light guide lighting device.

When the detector is a fluorescence detector, the system further comprises a fluorescence filter 5 arranged between the fluorescence detector and the receiving optical fiber, and the fluorescence filter is used for removing the emitted or diffused laser light so that a large amount of fluorescence is transmitted and is not influenced by the laser light.

The pulse laser 1 generates a pulse signal, which is coupled to the transmitting fiber 8 through the fiber coupler 2. The other end of the transmitting optical fiber 8 is coupled with the receiving optical fiber 9 through the evanescent wave coupling module 3. The optical fiber transmits laser to the optical fiber connector inserting core, and when a spring switch of the optical switch device 4 is not pressed, the light is directly emitted. When a spring switch of the optical switch device 4 is pressed down, a closed optical space is formed by the reflector and the optical fiber fixing plate, laser irradiates on the reflector coated with fluorescent powder, the fluorescent powder is excited to generate fluorescence and generate reflection to return along the optical fiber, evanescent wave coupling is generated through the evanescent wave coupling module 3, attenuated light energy exists in the emitting optical fiber 8 and the receiving optical fiber 9, and the emitted or dispersed laser can be removed through the fluorescent optical filter 5 by the light energy, so that the fluorescence can penetrate. The fluorescence detector 6 detects the reflected fluorescence, transmits a signal to the photoelectric box 7, and the photoelectric box receives the signal and controls the power-off of the light source, so that the effect of a power-off circuit is achieved. The switch button is released and the phosphor-coated mirror 44 is stretched upward by the spring 43, returning to its original position, due to the presence of the spring holding plate and the spring 43.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.