CN217084142U - Plastic optical fiber signal generator capable of adjusting light intensity - Google Patents
Plastic optical fiber signal generator capable of adjusting light intensity Download PDFInfo
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- CN217084142U CN217084142U CN202220569904.6U CN202220569904U CN217084142U CN 217084142 U CN217084142 U CN 217084142U CN 202220569904 U CN202220569904 U CN 202220569904U CN 217084142 U CN217084142 U CN 217084142U
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Abstract
The utility model discloses a plastics optical fiber signal generator of adjustable light intensity, including casing and the main circuit board of setting in the casing, its characterized in that is provided with signal generation circuit, light intensity regulating circuit, opto-coupler drive circuit and mode selection switch on the main circuit board, and signal generation circuit passes through mode selection switch and connects opto-coupler drive circuit, and light intensity regulating circuit connects opto-coupler drive circuit. The utility model discloses accessible light intensity regulating circuit and mode selection switch select different light intensity output states under the different modes, can provide the light intensity of different grades for the test is used, can test the fiber attenuation degree on the one hand and provide reference light source, and testable light intensity is to the influence of system operational aspect in addition, and it facilitates for product optimization and test.
Description
Technical Field
The utility model relates to a plastics optical fiber signal generator of adjustable light intensity belongs to light path test field.
Background
Plastic optical fiber is often used for the optical fiber communication function among the power electronic device, and in prior art, fixed light intensity generator is comparatively common, and fixed light intensity only can test optic fibre to the decay degree of light intensity, and in the actual work in addition test optic fibre, photoelectric conversion circuit and subsequent processing circuit to equipment, fixed light intensity has not satisfied the test demand under to different light intensities.
SUMMERY OF THE UTILITY MODEL
The utility model provides a plastic optical fiber signal generator of adjustable light intensity has solved the problem that reveals among the background art.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
the utility model provides a plastic optical fiber signal generator of adjustable light intensity, includes the casing and sets up the main circuit board in the casing, is provided with signal generation circuit, light intensity regulating circuit, opto-coupler drive circuit and mode selection switch on the main circuit board, and signal generation circuit passes through the mode selection switch and connects opto-coupler drive circuit, and light intensity regulating circuit connects opto-coupler drive circuit.
The mode selection switch is used for selecting a working mode of fixed level signal output or a working mode of pulse signal output; under the pulse signal output working mode, the signal generating circuit outputs a signal for controlling the optical fiber to the optical coupling driving circuit; and in the working mode of outputting the fixed level signal, the signal generating circuit is disconnected with the optocoupler driving circuit, and the optocoupler driving circuit is grounded through the mode selection switch.
The signal generating circuit is used for generating square waves with fixed frequency.
The mode selection switch is an alternative switch, a static contact in the alternative switch is connected with the optical coupling driving circuit, one movable contact in the alternative switch is connected with the communication signal generating circuit, and the other movable contact in the alternative switch is grounded.
The light intensity adjusting circuit is used for adjusting the driving current of the optocoupler driving circuit.
The light intensity adjusting circuit comprises a dial switch, one end of the switch in the dial switch is connected with the optical coupling driving circuit, and the other end of the switch is connected with the power supply through a resistor.
The utility model discloses the beneficial effect who reaches: the utility model discloses accessible light intensity regulating circuit and mode selection switch select different light intensity output states under the different modes, can provide the light intensity of different grades for the test is used, can test the fiber attenuation degree on the one hand and provide reference light source, and testable light intensity is to the influence of system operational aspect in addition, and it facilitates for product optimization and test.
Drawings
FIG. 1 is a block diagram of the present invention;
fig. 2 is a circuit diagram of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, the plastic optical fiber signal generator with adjustable light intensity comprises a housing and a main circuit board arranged in the housing, wherein the main circuit board is provided with a signal generating circuit, a light intensity adjusting circuit, an optical coupler driving circuit and a mode selection switch.
The optical fiber control circuit comprises a signal generating circuit, a light intensity adjusting circuit, a mode selecting switch and a pulse signal output working mode, wherein the signal generating circuit is used for generating square waves with fixed frequency, the light intensity adjusting circuit is used for adjusting the driving current of an optical coupling driving circuit and can realize the graded adjustment of light intensity, the mode selecting switch is used for selecting the working mode of fixed level signal output or the working mode of pulse signal output, and the signal generating circuit outputs signals for controlling optical fibers to the optical coupling driving circuit in the working mode of pulse signal output; under the working mode of fixed level signal output, the signal generating circuit is disconnected with the optocoupler drive circuit, the optocoupler drive circuit is grounded through the mode selection switch, the control optical fiber is normally bright, and the optocoupler drive circuit is used for driving the optocoupler.
The signal generating circuit is connected with the optical coupler driving circuit through the mode selection switch, and the light intensity adjusting circuit is connected with the optical coupler driving circuit. The light intensity can be adjusted and output step by step under different modes through the light intensity adjusting circuit and the mode selection switch.
Of course, the generator must also have a power module for providing a 5V power supply and supporting any one of a switching power supply, a battery power supply and a USB power supply, and the power module is a common structure and will not be described in detail here.
The signal generation circuit, the light intensity adjusting circuit, the optical coupler driving circuit and the mode selection switch circuit can be as shown in fig. 2, wherein the signal generation circuit comprises a timing chip TLC555, a resistor R1, a resistor R2, a capacitor C1 and a capacitor C2. The pin 1 of the timing chip TLC555 is grounded, a resistor R1 is connected between the pin 7 and the pin 8 of the timing chip TLC555, the pin 5 of the timing chip TLC555 is connected with the anode of the capacitor C2, the cathode of the capacitor C2 is grounded, the pin 3 of the timing chip TLC555 is connected with one end of a resistor R2, the end is an output end of the signal generation circuit, the other end of the resistor R2 is connected with the pin 2 of the timing chip TLC555, the anode of the capacitor C1 and the pin 6 of the timing chip TLC555 are connected at the same time, and the cathode of the capacitor C1 is grounded.
After the signal generating circuit is powered on, a timing chip TLC555 generates a pulse signal, wherein the pulse period is T = 0.722/(R2 × C1) and is determined by R2 and C1.
The mode selection switch is an alternative switch S1, a fixed contact in the alternative switch S1 is connected with the optical coupler driving circuit, one movable contact in the alternative switch S1 is connected with the output end of the communication signal generating circuit, and the other movable contact in the alternative switch S1 is grounded.
The alternative switch S1 is defined to have two positions, i.e., an UP position and a DOWN position, and when the UP position of the mode selection switch is connected to the output terminal of the signal generating circuit, a pulse signal output is realized, and when the DOWN position of the mode selection switch is connected to ground, a fixed level signal output is realized.
The light intensity adjusting circuit comprises a dial switch X31, one end of a switch in the dial switch X31 is connected with the optocoupler driving circuit, and the other end of the switch is connected with a power supply through a resistor.
When all the switches in the dial switch X31 are ON, the light intensity is the maximum output, and when one bit is OFF, the light intensity is reduced by one step; by analogy, when only one bit is ON, the light intensity is minimum; when all is OFF, there is no light.
Taking the 8-bit toggle switch X31 in the figure as an example: 1. when the optical fiber light intensity is needed to be strongest, all switches in the dial switch X31 are ON; 2. when the optical fiber light intensity is required to be one level, one bit of the dial switch X31 is OFF, and seven bits are ON; 3. when two stages of optical fiber light intensity are needed, two bits in the dial switch X31 are OFF, and six bits are ON; 4. when the optical fiber light intensity is required to be three levels, three bits in the dial switch X31 are OFF, and five bits are ON; 5. by analogy, when the minimum optical fiber intensity is required, seven bits of the dial switch X31 are OFF and one bit is ON.
The optical coupler driving circuit comprises an optical coupler HFBR-1521 and a NAND gate 75452, a 2 pin of the NAND gate 75452 is connected with a mode selection switch, namely a static contact in an alternative switch S1, a 3 pin of the NAND gate 75452 is connected with a 2 pin of the optical coupler HFBR-1521 and one end of a resistor R3, the other end of the resistor R3 is connected with a power supply, and a 1 pin of the optical coupler HFBR-1521 is connected with a dial switch X31.
The signal generating circuit generates a pulse signal after being electrified, the pulse signal is connected to the mode selection switch, the mode selection switch selects different modes through gears, generates a driving signal through the NAND gate 75452, and forms a driving loop through connecting the optocoupler HFBR-1521 and the dial switch X31 to drive the optocoupler HFBR-1521 to output a light signal.
The utility model discloses accessible light intensity regulating circuit and mode selection switch select different light intensity output states under the different modes, can provide the light intensity of different grades for the test is used, can test the fiber attenuation degree on the one hand and provide reference light source, and testable light intensity is to the influence of system operational aspect in addition, and it facilitates for product optimization and test.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (6)
1. The utility model provides a plastic optical fiber signal generator of adjustable light intensity, includes the casing and sets up the main circuit board in the casing, its characterized in that, is provided with signal generation circuit, light intensity regulating circuit, opto-coupler drive circuit and mode selection switch on the main circuit board, and signal generation circuit passes through the mode selection switch and connects opto-coupler drive circuit, and light intensity regulating circuit connects opto-coupler drive circuit.
2. The plastic optical fiber signal generator of claim 1, wherein the mode selection switch is used to select a working mode of a fixed level signal output or a working mode of a pulse signal output; under the pulse signal output working mode, the signal generating circuit outputs a signal for controlling the optical fiber to the optical coupling driving circuit; and in the working mode of outputting the fixed level signal, the signal generating circuit is disconnected with the optocoupler driving circuit, and the optocoupler driving circuit is grounded through the mode selection switch.
3. The plastic optical fiber signal generator of claim 1 or 2, wherein the signal generating circuit is configured to generate a square wave with a fixed frequency.
4. The plastic optical fiber signal generator of claim 1 or 2, wherein the mode selection switch is an alternative switch, a fixed contact of the alternative switch is connected with the optical coupling driving circuit, one movable contact of the alternative switch is connected with the signal generating circuit, and the other movable contact of the alternative switch is grounded.
5. The plastic optical fiber signal generator of claim 1, wherein the optical intensity adjusting circuit is configured to adjust a driving current of the optical coupler driving circuit.
6. The plastic optical fiber signal generator of claim 1 or 5, wherein the light intensity adjusting circuit comprises a dial switch, one end of the switch in the dial switch is connected with the optical coupling driving circuit, and the other end is connected with the power supply through a resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220569904.6U CN217084142U (en) | 2022-03-16 | 2022-03-16 | Plastic optical fiber signal generator capable of adjusting light intensity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220569904.6U CN217084142U (en) | 2022-03-16 | 2022-03-16 | Plastic optical fiber signal generator capable of adjusting light intensity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217084142U true CN217084142U (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220569904.6U Active CN217084142U (en) | 2022-03-16 | 2022-03-16 | Plastic optical fiber signal generator capable of adjusting light intensity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217084142U (en) |
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- 2022-03-16 CN CN202220569904.6U patent/CN217084142U/en active Active
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