Switching signal transmission control system based on optical fiber

Abstract

The invention discloses a switch quantity signal transmission control system based on optical fiber, which is applied to the field of optical fiber communication, and is designed to solve the problems of complicated transmission cables, susceptibility to electromagnetic interference, and difficulty in path self-checking in the transmission of a large number of switch quantity signals in industrial process measurement and control systems. The invention adopts optical signals of different wavelengths to independently transmit different switch quantity signals, and optical signals carrying different switch quantity signals are transmitted through optical fibers. Before entering the control system, the optical signals carrying different switch quantity signals are converted into corresponding electrical signals through a plurality of second photoelectric detectors, and the plurality of electrical signals carry different switch quantity signals. After being amplified by a voltage amplifier, each electrical signal is input into a switch valve or a relay, so as to realize the transmission of a large number of switch quantity signals. Before entering the second photoelectric detector, the optical signals carrying different switch quantity signals are simultaneously reflected back to the first photoelectric detector through a reflector, converted into electrical signals and output to a semiconductor diode, so as to realize path self-checking.

Description

Technical Field

[0001] The invention belongs to the technical field of optical fiber communication, and in particular relates to a switch quantity transmission control system. Background Art

[0002] A large amount of switching signal transmission is required in industrial process measurement and control systems. Traditional transmission methods mostly use the on-off of 24V or 48V electrical signals to transmit switching signals. This method requires a large number of cables, is not easy to isolate and distribute multiple terminals, is difficult to perform path self-inspection, and also has certain deficiencies in electromagnetic compatibility.

[0003] Optical fiber has the advantages of small size, resistance to electromagnetic interference, and strong multiplexing capability, and can realize the independent transmission of multiple signals simultaneously on one optical fiber. Summary of the invention

[0004] In order to solve the problems of cumbersome transmission cables, inability to perform path self-check, and susceptibility to electromagnetic interference in the transmission of a large number of switch signals in current industrial process measurement and control systems; the present invention proposes a switch signal transmission control system based on optical fiber, which utilizes the advantages of optical fiber such as small size, resistance to electromagnetic interference, and strong multiplexing capability to realize a switch transmission control system with a simple transmission path and path self-check.

[0005] One of the technical solutions adopted by the present invention is: a switch signal transmission control system based on optical fiber,

[0006] Different switching signals are transmitted independently using optical signals of different wavelengths, including: a light source generation module, n optical switches, a switching signal output system, an n*1 wavelength division multiplexer, an optical fiber, a first 1*n wavelength division multiplexer, a second photodetector, a voltage amplifier, and a switch valve;

[0007] The light source generation module is used to generate n optical signals with different wavelengths. The n optical switches generate n different switch signals under the control of the switch signal output system. The n optical signals with different wavelengths generated by the light source generation module are loaded with a switch signal after passing through the corresponding optical switches, so as to obtain n optical signals with different switch signals. The n optical signals with different switch signals are input into an n*1 wavelength division multiplexer to synthesize one optical signal. The one optical signal is input into a 1*n wavelength division multiplexer through an optical fiber and is divided into n optical signals with different switch signals through a first 1*n wavelength division multiplexer. The n optical signals with different switch signals are respectively converted into n electrical signals through n second photodetectors, and the n electrical signals are respectively input into switch valves through n voltage amplifiers.

[0008] Furthermore, it also includes n 2*1 couplers, n 1*2 splitters, n reflectors, n second photodetectors, and n light emitting diodes;

[0009] The n optical signals with different switching value signals outputted from the n optical switches are respectively inputted from the first ends of the n 2*1 couplers, and the n optical signals with different switching value signals outputted from the second ends of the n 2*1 couplers are inputted into the n*1 wavelength division multiplexer to synthesize one optical signal;

[0010] The optical signals divided into n paths with different switching value signals by the first 1*n wavelength division multiplexer are respectively inputted through the first ends of n 1*2 splitters, the optical signals outputted through the second ends of the n 1*2 splitters are used as the output of the transmission system, and the optical signals outputted through the third ends of the n 1*2 splitters enter the n reflectors respectively;

[0011] The n optical signals reflected by the reflector are respectively input from the third ends of the n 1*2 splitters, output from the first ends of the n 1*2 splitters, and then sequentially pass through the first 1*n wavelength division multiplexer, the optical fiber, and the n*1 wavelength division multiplexer and then are respectively input to the second ends of the n 2*1 couplers. The optical signal output from the third end of the 2*1 coupler is converted into an electrical signal by the first photodetector and input into the light emitting diode.

[0012] Furthermore, the light source generation module includes: a broadband light source and a second 1*n wavelength division multiplexer, and the broadband light source generates n optical signals with different wavelengths through the second 1*n wavelength division multiplexer.

[0013] Furthermore, the light source generating module is n single-wavelength light sources with different wavelengths.

[0014] Furthermore, all light-emitting diodes are replaced by a signal acquisition and processing system to achieve fixed-point detection in the switch quantity transmission path.

[0015] Going a step further, the on-off valve is replaced by a relay.

[0016] Furthermore, the switch output system is circuit or manually controlled.

[0017] The second technical solution adopted by the present invention is: a switch quantity signal transmission control system based on optical fiber, which uses optical signals of different wavelengths to independently transmit different switch quantity signals, including: multiple single-wavelength light sources with different wavelengths, a switch quantity signal output system, an n*1 wavelength division multiplexer, an optical fiber, a 1*n wavelength division multiplexer, a second photodetector, a voltage amplifier, and a switch valve;

[0018] The multiple single-wavelength light sources with different wavelengths generate n optical signals with different switching signals under the control of the switching signal output system; the n optical signals with different switching signals are input into an n*1 wavelength division multiplexer to synthesize one optical signal; the one optical signal is input into a 1*n wavelength division multiplexer via an optical fiber and is divided into n optical signals with different switching signals via the 1*n wavelength division multiplexer; the n optical signals with different switching signals are converted into n electrical signals via n second photodetectors respectively, and the n electrical signals are input into the switch valves respectively via n voltage amplifiers.

[0019] Furthermore, it also includes n 2*1 couplers, n 1*2 splitters, n reflectors, n first photodetectors, and n light emitting diodes;

[0020] The n optical signals with different switching value signals are respectively input from the first ends of n 2*1 couplers, and the n optical signals with different switching value signals output from the second ends of n 2*1 couplers are input into an n*1 wavelength division multiplexer to synthesize one optical signal;

[0021] The optical signals divided into n paths with different switching value signals by the 1*n wavelength division multiplexer are respectively inputted through the first ends of n 1*2 splitters, the optical signals outputted through the second ends of the n 1*2 splitters are used as the output of the transmission system, and the optical signals outputted through the third ends of the n 1*2 splitters enter the n reflectors respectively;

[0022] The n optical signals reflected by the reflector are respectively input from the third ends of the n 1*2 splitters, output from the first ends of the n 1*2 splitters, and then sequentially pass through the 1*n wavelength division multiplexer, the optical fiber, and the n*1 wavelength division multiplexer and then are respectively input to the second ends of the n 2*1 couplers. The optical signal output from the third end of the 2*1 coupler is converted into an electrical signal by the first photodetector and input into the light emitting diode.

[0023] Furthermore, all light-emitting diodes are replaced by a signal acquisition and processing system to achieve fixed-point detection in the switch quantity transmission path.

[0024] Going a step further, the on-off valve is replaced by a relay.

[0025] Furthermore, the switch output system is circuit or manually controlled.

[0026] Beneficial effects of the present invention: The optical fiber-based switch signal transmission control system of the present invention utilizes the advantages of optical fiber such as small size, anti-electromagnetic radiation, and strong multiplexing capability, and uses optical fiber to realize the independent transmission of different switch signals by optical signals of different wavelengths, thereby realizing the transmission of a large number of switch signals. The present invention has the following advantages:

[0027] 1. Use optical fiber transmission and optical signals of different wavelengths to load different switching signals respectively, so as to realize the transmission of a large number of switching signals;

[0028] 2. Realize the self-inspection of the access path;

[0029] 3. Realize fixed-point monitoring of the optical path. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is Embodiment 1 of the optical fiber-based switch signal transmission control system of the present invention;

[0031] Figure 2 This is Embodiment 2 of the optical fiber-based switch signal transmission control system of the present invention;

[0032] Figure 3 This is Embodiment 3 of the optical fiber-based switch signal transmission control system of the present invention;

[0033] Among them, 11 is a broadband light source, 21 is a second 1*16 wavelength division multiplexer, 22 is a first 1*16 wavelength division multiplexer, 3 is an optical switch, 4 is a 2*1 coupler, 5 is a 16*1 wavelength division multiplexer, 6 is a 1*2 splitter, 7 and 8 are photodetectors, 9 is a reflector, 10 is a voltage amplifier, 11 is a light emitting diode, 12 is a transmission optical fiber, 13 is a circuit or manual switch signal output system, 14 is a switch valve or relay, and 15, 16, and 17 are single-wavelength light sources of three different wavelengths. DETAILED DESCRIPTION

[0034] To facilitate those skilled in the art to understand the technical content of the present invention, the present invention is further explained below with reference to the accompanying drawings.

[0035] Embodiment 1

[0036] The light source generation module is implemented as follows: comprising: a broadband light source and a second 1*n wavelength division multiplexer, wherein the broadband light source generates n optical signals of different wavelengths through the second 1*n wavelength division multiplexer; Figure 1 As shown, the optical fiber-based switch quantity signal transmission control system of the present invention comprises: a broadband light source 1, two 1*n wavelength division multiplexers 21, 22, an optical switch 3, a 2*1 coupler 4, an n*1 wavelength division multiplexer 5, a 1*2 splitter 6, two groups of n photodetectors 7, 8, a reflector 9, a voltage amplifier 10, a light emitting diode 11, a transmission optical fiber 12, a circuit or manual switch quantity signal output system 13, and a switch valve or relay 14;

[0037] The working principle is as follows: the broadband light source 11 is divided into n optical paths with different wavelengths by a 1*n wavelength division multiplexer 21, and respectively connected to n optical switches 3 controlled by a circuit or manually controlled switch quantity signal output system 13; the optical signal with the switch quantity signal output by the optical switch 3 is input through the first end of the 2*1 coupler 4, and the optical signal output from the second end of the 2*1 coupler 4 is input into the n*1 wavelength division multiplexer 5, and synthesized into one optical signal through the n*1 wavelength division multiplexer 5; the one optical signal is input into the 1*n wavelength division multiplexer 22 through a long-distance transmission optical fiber 12 and divided into n optical paths with different switch quantity signals; the n optical signals are respectively passed through n 1*2 splitters 6, and the n optical signals are respectively The optical signal output from the first end of n 1*2 splitters 6 is input, and the optical signal output from the second end of the splitter 6 is input to the photodetector 7 and converted into an electrical signal. The electrical signal carries different switching signals. The electrical signal is finally input to the switch valve or relay 14 through the voltage amplifier 10 to complete the transmission of the switching signal. The optical signal output from the third end of the splitter 6 is input to the reflector 9. The optical signal reflected back by the reflector 9 passes through the 1*n wavelength division multiplexer 22, the transmission optical fiber, and the n*1 wavelength division multiplexer in sequence, and is input from the second end of the 2*1 coupler 4. The optical signal output from the third end of the 2*1 coupler 4 is input to the light emitting diode 11 through the photodetector 8, and finally the path self-check function of the system is realized.

[0038] Embodiment 2

[0039] In order to facilitate understanding of the content of the present invention, in this embodiment, the value of n is set to 3.

[0040] The light source generation module is implemented by replacing the broadband light source 1 and the 1*3 wavelength division multiplexer 21 described in the first embodiment with a plurality of single wavelength light sources with different wavelengths; Figure 2 As shown, the optical fiber-based switch quantity signal transmission system of the present invention comprises: a single wavelength light source 15, 16, 17, a 1*3 wavelength division multiplexer 22, an optical switch 3, a 2*1 coupler 4, a 3*1 wavelength division multiplexer 5, a 1*2 splitter 6, two groups of n photodetectors 7, 8, a reflector 9, a voltage amplifier 10, a light emitting diode 11, a transmission optical fiber 12, a circuit or manual switch quantity signal output system 13, and a switch valve or relay 14;

[0041] The three single-wavelength light sources 15, 16, 17 with different wavelengths are respectively connected to three optical switches 3 controlled by a switch quantity signal output system 13 controlled by a circuit or manually. The optical signal with the switch quantity signal output by the optical switch 3 is input through the first end of the 2*1 coupler 4, and the optical signal output from the second end of the 2*1 coupler 4 is input into the 3*1 wavelength division multiplexer 5. After the 3*1 wavelength division multiplexer 5, one optical signal is synthesized into one optical signal. The one optical signal is input into the 1*3 wavelength division multiplexer 22 through a long-distance transmission optical fiber 12 and divided into three optical paths with different switch quantity signals. The three optical signals are respectively output from three 1*2 splitters. 6, the optical signal output from the second end of the splitter 6 is input to the photodetector 7 to be converted into an electrical signal, and finally input to the switch valve or relay 14 through the voltage amplifier 10 to complete the transmission of the switch signal, the optical signal output from the third end of the splitter 6 is input to the reflector 9, the optical signal reflected back by the reflector 9 passes through the 1*3 wavelength division multiplexer 22, the transmission optical fiber, and the 3*1 wavelength division multiplexer in sequence, and is input from the second end of the 2*1 coupler 4, the optical signal output from the third end of the 2*1 coupler 4 is input to the light emitting diode 11 through the photodetector 8, and finally the path self-check function of the system is realized.

[0042] Embodiment 3

[0043] In order to facilitate understanding of the content of the present invention, in this embodiment, the value of n is set to 2.

[0044] The light source generation module is implemented as follows: the broadband light source 1 and the 1*2 wavelength division multiplexer 21 in the first embodiment are replaced by a plurality of single-wavelength light sources with different wavelengths, and the output of the single-wavelength light source is directly controlled by a circuit or manually, and thus there is no optical switch device, such as Figure 3 As shown, the optical fiber-based switching signal transmission system of the present invention comprises: single-wavelength light sources 15, 16, 1*2 wavelength division multiplexer 22, 2*1 coupler 4, 2*1 wavelength division multiplexer 5, 1*2 splitter 6, two groups of two photodetectors 7, 8 respectively, a reflector 9, a voltage amplifier 10, a light-emitting diode 11, a transmission optical fiber 12, a circuit or manual switching signal output system 13, and a switch valve or relay 14;

[0045] The two single-wavelength light sources 15 and 16 with different wavelengths are respectively controlled by a switch signal output system 13 controlled by a circuit or manually. The optical signal with the switch signal output by the light source is input through the first end of the 2*1 coupler 4, and the optical signal output from the second end of the 2*1 coupler 4 is input into the 2*1 wavelength division multiplexer 5. After the 2*1 wavelength division multiplexer 5, one optical signal is synthesized into one optical signal. The one optical signal is input into the 1*2 wavelength division multiplexer 22 through a long-distance transmission optical fiber 12 and is divided into two optical paths with different switch signals. The two optical signals are respectively output from the first end of the three 1*2 splitters 6. The optical signal output from the second end of the splitter 6 is input to the photodetector 7 to be converted into an electrical signal, and finally input to the switch valve or relay 14 through the voltage amplifier 10 to complete the transmission of the switch signal. The optical signal output from the third end of the splitter 6 is input to the reflector 9. The optical signal reflected back by the reflector 9 passes through the 1*2 wavelength division multiplexer 22, the transmission optical fiber, and the 2*1 wavelength division multiplexer in sequence, and is input from the second end of the 2*1 coupler 4. The optical signal output from the third end of the 2*1 coupler 4 is input to the light emitting diode 11 through the photodetector 8, and finally the path self-check function of the system is realized.

[0046] The optical switch 3 in the first and second embodiments converts optical signals of different wavelengths into optical signals with switch quantity signals for output through a circuit or manual switch quantity output control system 13. In the third embodiment, optical signals of different wavelengths are converted into optical signals with switch quantity signals for output through a circuit or manual control of the output of the light sources 15 and 16.

[0047] The voltage amplifier 10 in the above three embodiments adjusts the output according to the voltage required by the switch valve or relay;

[0048] The light emitting diode 11 in the above three embodiments can realize the path self-checking function of the system by judging whether the light path is on or off through its output;

[0049] The light emitting diode 11 in the above three embodiments can be replaced by a signal acquisition and processing system, thereby realizing the fixed-point monitoring function of the optical path.

[0050] Those skilled in the art will appreciate that the embodiments described herein are intended to help readers understand the principles of the present invention, and should be understood that the scope of protection of the present invention is not limited to such specific statements and embodiments. For those skilled in the art, the present invention may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The optical fiber-based switch signal transmission control system is characterized by: Different switching signals are transmitted independently using optical signals of different wavelengths, including: a light source generation module, n optical switches, a switching signal output system, an n*1 wavelength division multiplexer, an optical fiber, a first 1*n wavelength division multiplexer, a second photodetector, a voltage amplifier, and a switch valve; The light source generation module is used to generate n optical signals with different wavelengths. The n optical switches generate n different switch signals under the control of the switch signal output system. The n optical signals with different wavelengths generated by the light source generation module are loaded with a switch signal after passing through the corresponding optical switches, so as to obtain n optical signals with different switch signals. The n optical signals with different switch signals are input into an n*1 wavelength division multiplexer to synthesize one optical signal. The one optical signal is input into a 1*n wavelength division multiplexer through an optical fiber and is divided into n optical signals with different switch signals through a first 1*n wavelength division multiplexer. The n optical signals with different switch signals are respectively converted into n electrical signals through n second photoelectric detectors, and the n electrical signals are respectively input into switch valves through n voltage amplifiers. It also includes n 2*1 couplers, n 1*2 splitters, n reflectors, n first photodetectors, and n light emitting diodes; The n optical signals with different switching value signals outputted from the n optical switches are respectively inputted from the first ends of the n 2*1 couplers, and the n optical signals with different switching value signals outputted from the second ends of the n 2*1 couplers are inputted into the n*1 wavelength division multiplexer to synthesize one optical signal; The optical signals divided into n paths with different switching value signals by the first 1*n wavelength division multiplexer are respectively inputted through the first ends of n 1*2 splitters, the optical signals outputted through the second ends of the n 1*2 splitters are used as the output of the transmission system, and the optical signals outputted through the third ends of the n 1*2 splitters enter the n reflectors respectively; The n optical signals reflected by the reflector are respectively input from the third ends of the n 1*2 splitters, output from the first ends of the n 1*2 splitters, and then sequentially pass through the first 1*n wavelength division multiplexer, the optical fiber, and the n*1 wavelength division multiplexer and then respectively input to the second ends of the n 2*1 couplers. The optical signal output from the third end of the 2*1 coupler is converted into an electrical signal by the first photodetector and input into the light emitting diode. The light source generation module comprises: a broadband light source and a second 1*n wavelength division multiplexer, wherein the broadband light source generates n optical signals of different wavelengths through the second 1*n wavelength division multiplexer; The light source generating module is n single-wavelength light sources with different wavelengths.

2. The optical fiber-based switch signal transmission control system according to claim 1, characterized in that: Replace all light emitting diodes with signal acquisition and processing systems.

3. The optical fiber-based switch signal transmission control system according to claim 2, characterized in that: Replace the on-off valve with a relay.

4. The optical fiber-based switch signal transmission control system according to claim 3, characterized in that: The switch output system is controlled by circuit or manually.

5. The optical fiber-based switch signal transmission control system is characterized in that: Different switching signals are transmitted independently using optical signals of different wavelengths, including: multiple single-wavelength light sources with different wavelengths, a switching signal output system, an n*1 wavelength division multiplexer, an optical fiber, a 1*n wavelength division multiplexer, a second photodetector, a voltage amplifier, and a switch valve; The multiple single-wavelength light sources with different wavelengths generate n optical signals with different switching signals under the control of the switching signal output system; the n optical signals with different switching signals are input into an n*1 wavelength division multiplexer to synthesize one optical signal; the one optical signal is input into a 1*n wavelength division multiplexer via an optical fiber and is divided into n optical signals with different switching signals via the 1*n wavelength division multiplexer; the n optical signals with different switching signals are converted into n electrical signals via n second photodetectors respectively, and the n electrical signals are input into the switch valves respectively via n voltage amplifiers.

6. The optical fiber-based switch signal transmission control system according to claim 5, characterized in that: It also includes n 2*1 couplers, n 1*2 splitters, n reflectors, n first photodetectors, and n light emitting diodes; The n optical signals with different switching value signals are respectively input from the first ends of n 2*1 couplers, and the n optical signals with different switching value signals output from the second ends of n 2*1 couplers are input into an n*1 wavelength division multiplexer to synthesize one optical signal; The optical signals divided into n paths with different switching value signals by the 1*n wavelength division multiplexer are respectively inputted through the first ends of n 1*2 splitters, the optical signals outputted through the second ends of the n 1*2 splitters are used as the output of the transmission system, and the optical signals outputted through the third ends of the n 1*2 splitters enter the n reflectors respectively; The n optical signals reflected by the reflector are respectively input from the third ends of the n 1*2 splitters, output from the first ends of the n 1*2 splitters, and then sequentially pass through the 1*n wavelength division multiplexer, the optical fiber, and the n*1 wavelength division multiplexer and then are respectively input to the second ends of the n 2*1 couplers. The optical signal output from the third end of the 2*1 coupler is converted into an electrical signal by the first photodetector and input into the light emitting diode.

7. The optical fiber-based switch signal transmission control system according to claim 6, characterized in that: The switch output system is controlled by circuit or manually.

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