CN211959210U - Hand-held optical time domain reflectometer - Google Patents
Hand-held optical time domain reflectometer Download PDFInfo
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- CN211959210U CN211959210U CN202020452572.4U CN202020452572U CN211959210U CN 211959210 U CN211959210 U CN 211959210U CN 202020452572 U CN202020452572 U CN 202020452572U CN 211959210 U CN211959210 U CN 211959210U
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- domain reflectometer
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Abstract
The utility model discloses a hand-held optical time domain reflectometer, which belongs to the technical field of optical time domain reflectometers, and comprises a shell, wherein the shell comprises an instrument front shell and an instrument back shell buckled with the instrument front shell, the inner bottom of the shell is fixedly connected with a power supply fixedly connected with the instrument back shell, the inner side of the shell is provided with a power supply, a PCB (printed circuit board) and a detection assembly, the PCB is electrically connected with the power supply, and the top end of the instrument front shell is fixedly provided with a lamp and a lamp switch. Has no limitation and convenient use.
Description
Technical Field
The utility model relates to an optical time domain reflectometer especially relates to a hand-held type optical time domain reflectometer, belongs to optical time domain reflectometer technical field.
Background
KOTDR hand-held optical time domain reflectometer, hereinafter referred to as OTDR, is a new generation of intelligent optical fiber measuring instrument designed for optical fiber communication system test. The product is mainly used for measuring parameters such as the length, the loss, the connection quality and the like of various optical fibers and optical cables; the method can quickly and accurately locate the event points and the fault points in the optical fiber link. The method can be widely applied to engineering construction, maintenance test and emergency repair of the underground coal mine optical fiber communication system; development and production measurement of optical fibers and optical cables and the like.
The existing optical time domain reflectometer can only be operated through a key, is inconvenient to use, cannot be normally used when the key fails, affects work, has poor cruising ability, cannot be used for a long time, is not assisted by light, cannot work under the conditions of no light source and low light source intensity, and has strong limitation.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims at providing a hand-held type light time domain reflectometer, through silica gel button and touch display screen's dual operation mode, the operation is directly perceived, user's use has greatly been simplified, the complete machine adopts intelligent power management mode, the work duration reinforcing of large capacity lithium cell messenger complete machine, be suitable for long-term open-air environment very much and use, be provided with the lamp simultaneously, the convenience is used under the condition that does not have light source and light source intensity low, there is not the limitation, convenient to use.
The purpose of the utility model can be achieved by adopting the following technical scheme:
the utility model provides a hand-held type optical time domain reflectometer, includes the casing, the casing include the instrument front shell and with the instrument backshell of casing lock joint before the instrument, the inboard bottom fixed connection of casing with instrument backshell fixed connection's power, the inboard installation power, PCB board and the determine module of casing, power electric connection's PCB board, PCB board are connected together with determine module, the preceding side surface of casing is inlayed and is had a plurality of silica gel button and touch display screen before the instrument, the upper end both sides of casing are in the same place through flange head OTDR interface and the VFL interface fixed connection that determine module is connected respectively, and the top fixed mounting of instrument front shell has lamp and lamp switch.
As a further aspect of the present invention: the upper ends of the OTDR interface and the VFL interface are respectively clamped with a bead chain cap, and the upper ends of the bead chain caps are fixedly connected with a bead chain of the shell.
As a further aspect of the present invention: the rear side fixed mounting of instrument backshell has the support fixing base, the support fixing base passes through buckle linking bridge.
As a further aspect of the present invention: and the inner side surface of the instrument rear shell is fixedly connected with a TPU elastomer.
As a further aspect of the present invention: the power supply forms a closed series circuit with the lamp and the lamp switch.
As a further aspect of the present invention: the detection assembly is in signal connection with the PCB, the touch display screen is in electrical connection with the PCB, and the silica gel key is in signal connection with the PCB.
As a further aspect of the present invention: the power supply is a high-capacity lithium battery.
As a further aspect of the present invention: the lower part of the rear side of the instrument rear shell is inwards sunken, and the support is of a rectangular structure parallel to the instrument rear shell.
The utility model has the advantages of:
1. through the dual operation mode of the silica gel keys and the touch display screen, the operation is intuitive, and the use of a user is greatly simplified;
2. the whole machine adopts an intelligent power management mode, and the working endurance capacity of the whole machine is enhanced by the large-capacity lithium battery, so that the whole machine is very suitable for being used in a long-term field environment;
3. meanwhile, the illuminating lamp is arranged, so that the illuminating lamp is convenient to use under the conditions of no light source and low light source intensity, has no limitation and is convenient to use;
4. the TPU elastomer can protect components in the shell, reduce the damage probability caused by falling and effectively protect the reflectometer;
5. the unique one-click analysis can quickly obtain a test result through a silica gel key, events are displayed on a main interface in a list form, and related information comprises: event type, event location, loss, reflection, attenuation between event points, total loss, etc.
Drawings
FIG. 1 is a side cross-sectional view of a preferred embodiment of a hand-held optical time domain reflectometer according to the present invention;
FIG. 2 is a rear view of a meter back case in accordance with a preferred embodiment of the hand held optical time domain reflectometer of the present invention;
FIG. 3 is a front view of the front housing of a preferred embodiment of the hand held optical time domain reflectometer according to the present invention;
FIG. 4 is a side cross-sectional view of a meter backshell in accordance with a preferred embodiment of the hand held optical time domain reflectometer of the present invention;
FIG. 5 is a top view of a preferred embodiment of a hand held optical time domain reflectometer according to the present invention;
fig. 6 is a schematic circuit diagram of a lamp and power supply according to a preferred embodiment of the handheld optical time domain reflectometer of the present invention;
fig. 7 is a schematic diagram of a voltage rectification circuit according to a preferred embodiment of the handheld optical time domain reflectometer of the present invention;
fig. 8 is a schematic diagram of a voltage rectification circuit in accordance with a preferred embodiment of the present invention;
FIG. 9 is an electrical schematic diagram of a battery protection plate of a preferred embodiment of the hand held optical time domain reflectometer according to the present invention;
FIG. 10 is a schematic diagram of a reflection event signal of a preferred embodiment of a hand-held optical time domain reflectometer according to the present invention;
FIG. 11 is a schematic diagram of a non-reflective event signal of a preferred embodiment of a hand-held optical time domain reflectometer according to the present invention;
fig. 12 is a dynamic range diagram of a preferred embodiment of a hand-held optical time domain reflectometer according to the present invention.
In the figure: 1-an instrument front shell, 2-an instrument rear shell, 3-a touch display screen, 4-a PCB (printed Circuit Board), 5-a silica gel key, 6-a power supply, 7-a flange head, 8-an OTDR (optical time Domain reflectometer) interface, 9-a bead chain cap, 10-a bracket fixing seat, 11-a bracket, 12-a detection component, 13-a bead chain, 14-a lamp, 15-a TPU (thermoplastic polyurethane elastomer), 16-a lamp switch, 17-a VFL (vacuum visual test) interface and 18-a shell.
Detailed Description
In order to make the technical solutions of the present invention clearer and clearer for those skilled in the art, the present invention will be described in further detail with reference to the following embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
As shown in fig. 1 to 12, the handheld optical time domain reflectometer provided in this embodiment includes a housing 18, where the housing 18 includes a front housing 1 and a back housing 2 fastened to the front housing 1, a power supply 6 fixedly connected to the back housing 2 is fixedly connected to the bottom of the inner side of the housing 18, the power supply 6, a PCB 4 and a detection assembly 12 are installed on the inner side of the housing 18, the PCB 4 is electrically connected to the power supply 6, the PCB 4 is connected to the detection assembly 12, a plurality of silicone keys 5 and a touch display screen 3 are embedded on the front side surface of the front housing 1, two sides of the upper end of the housing 18 are fixedly connected to an OTDR interface 8 and a VFL interface 17 respectively connected to the detection assembly 12 through a flange head 7, a lamp 14 and a lamp switch 16 are fixedly installed at the top end of the front housing 1, and a dual operation mode of the silicone keys 5 and the touch display screen 3 is adopted, the operation is directly perceived, user's use has greatly been simplified, the complete machine adopts intelligent power management mode, the large capacity lithium cell makes the work duration reinforcing of complete machine, be suitable for long-term open-air environment to use very much, be provided with lamp 14 simultaneously, the convenience is used under the condition that does not have light source and light source intensity low, there is not the limitation, high durability and convenient use, unique key formula analysis can obtain the test result through silica gel button 5 fast, the incident is shown in the main interface with the list form, relevant information includes: event type, event location, loss, reflection, attenuation between event points, total loss, etc.
In this embodiment, as shown in fig. 2 and fig. 3, the upper ends of the OTDR interface 8 and the VFL interface 17 are both clamped with a bead chain cap 9, and the upper end of the bead chain cap 9 is fixedly connected with the bead chain 13 of the housing 18, so that the use is convenient.
In this embodiment, as shown in fig. 1, fig. 2 and fig. 4, a bracket fixing seat 10 is fixedly installed at the rear side of the meter back case 2, the bracket fixing seat 10 is connected with a bracket 11 through a buckle, and the bracket 11 can be buckled on clothes and a belt of a user, so as to be convenient to carry.
In this embodiment, as shown in fig. 4, the TPU elastomer 15 is fixedly connected to the inner side surface of the instrument back case 2, and the TPU elastomer 15 can protect components in the case 18, thereby reducing the probability of damage caused by dropping.
In the present embodiment, as shown in fig. 5 and 6, the power supply 6, the lamp 14 and the lamp switch 16 form a closed series circuit, and the lamp 14 can be used continuously in case of damage of the reflectometer due to the independent circuit design.
In the embodiment, as shown in fig. 1, the detecting component 12 is in signal connection with the PCB 4, the touch display screen 3 is electrically connected with the PCB 4, and the silicone key 5 is in signal connection with the PCB 4.
In this embodiment, as shown in fig. 1, the power supply 6 is a high-capacity lithium battery, has a high endurance, and is very suitable for long-term outdoor environment.
In this embodiment, as shown in fig. 4, the lower portion of the rear side of the meter rear case 2 is recessed inward, and the support 11 is a rectangular structure parallel to the meter rear case 2, so that the instrument rear case is convenient to carry.
In this embodiment, as shown in fig. 7, one end of the capacitor C120 is electrically connected to the 6V power supply, the other end of the capacitor C120 is grounded, the other end of the power supply is electrically connected to the capacitor C121 and the pins 1 and 3 of the voltage regulator LP2985, the other end of the capacitor C121 is grounded, the pin 2 of the voltage regulator LP2985 is grounded, the pin 4 of the voltage regulator LP2985 is electrically connected to the capacitor C122, the other end of the capacitor C122 is grounded, the pin 5 of the voltage regulator LP2985 is electrically connected to the capacitor C123 and the inductor L18, the other end of the capacitor C123 is grounded, the other end of the inductor L18 is electrically connected to the capacitors C124 and the 5V power supply, the other end of the capacitor C124 is grounded, the other end of the 5V.
In the present embodiment, the event of the OTDR test refers to an abnormal point that causes a sudden change in loss or inversion rate. Including various connection points, fusion points, and locations where transmission signals are lost due to bending, cracking, or breaking in the optical fiber link. Events of OTDR testing are mainly classified into two categories: reflective events and non-reflective events.
Reflection events:
when the laser pulse emitted by the OTDR is transmitted along the measured optical fiber, if a movable connection point is encountered or the end of the optical fiber is encountered, a reflection phenomenon will occur due to an abrupt change in refractive index, a part of the optical signal will return to the instrument along the measured optical fiber, and the instrument will detect the reflection event by receiving the reflection signal. The OTDR test curve shows an upward spike of a certain width, and the width and amplitude of the spike are mainly determined by the pulse width used in the test and the intensity of the occurring reflection. As shown in fig. 10.
Non-reflective events:
when the laser pulse emitted by the OTDR is transmitted along the optical fiber to be measured, if a position where energy is partially lost due to a welding point or bending is encountered, there is no abrupt change in refractive index, so that the reflection phenomenon will not occur or can be ignored. The OTDR detects the difference in energy variation entering the receiving end of the OTDR through backscattering, and can detect the non-reflected event parameter of the point. The non-reflected event appears as a signal of decreasing energy on the OTDR test curve, the decreasing amplitude of which indicates a power loss condition. As shown in fig. 11.
In this embodiment, the dynamic range of the optical time domain reflectometer is an important parameter of the optical time domain reflectometer, in dB, as shown in fig. 12.
This parameter is expressed as the maximum optical loss that the OTDR can analyze when the backscattering level from the output port of the instrument drops to a certain noise level. In the practical use of OTDR, the farthest distance of the optical fiber link that OTDR can test is usually measured according to the maximum test pulse width provided by the instrument. Thus, the greater the dynamic range, the longer the distance the instrument can test the fiber link under the same link conditions.
As shown in fig. 1 to fig. 6, the principle of the handheld optical time domain reflectometer provided in this embodiment is as follows: during the use, first cable and OTDR interface 8 or VFL interface 17 are connected, then open the reflectometer, then use silica gel button 5 one-key formula detection and analysis, and touch display screen 3 can look over the detection time list, and the event is shown in the main interface in the form of list, and relevant information includes: the event type, the event position, the loss, the reflection, the attenuation between event points, the total loss and the like, when the light source is absent and the intensity of the light source is low, the irradiation lamp 14 is turned on through the irradiation lamp switch 16, the work is convenient, and meanwhile, the reflectometer can be hung on clothes or a belt through the support 11, so that the carrying is convenient.
To sum up, in this embodiment, according to the handheld optical time domain reflectometer of this embodiment, the handheld optical time domain reflectometer that this embodiment provided, through the dual mode of operation of silica gel button 5 and touch display screen 3, the operation is intuitive, user's use has greatly been simplified, the complete machine adopts intelligent power management mode, the large capacity lithium cell makes the work duration of complete machine strengthen, very be suitable for long-term open-air environment to use, be provided with the lamp 14 simultaneously, the convenience is used under the condition that does not have light source and light source intensity low, there is not the limitation, high durability and convenient use, unique one-button analysis, can obtain the test result through silica gel button 5 fast, the event is shown in the main interface in the form of a list, relevant information includes: event type, event position, loss, reflection, attenuation between event points, total loss and the like, the TPU elastomer 15 can protect components in the shell 18, reduce the probability of damage caused by falling, and effectively protect the reflectometer.
The above description is only a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any person skilled in the art can replace or change the technical solution and the concept of the present invention within the scope of the present invention.
Claims (8)
1. The hand-held optical time domain reflectometer is characterized by comprising a shell (18), wherein the shell (18) comprises an instrument front shell (1) and an instrument rear shell (2) buckled with the instrument front shell (1), the bottom of the inner side of the shell (18) is fixedly connected with a power supply (6) fixedly connected with the instrument rear shell (2), the inner side of the shell (18) is provided with the power supply (6), a PCB (4) and a detection component (12), the PCB (4) is electrically connected with the power supply (6), the PCB (4) is connected with the detection component (12), the front side surface of the instrument front shell (1) is embedded with a plurality of silica gel keys (5) and a touch display screen (3), two sides of the upper end of the shell (18) are fixedly connected with an OTDR interface (8) and a VFL interface (17) which are connected with the detection component (12) through flange heads (7) respectively, the top end of the instrument front shell (1) is fixedly provided with a radiation lamp (14) and a radiation lamp switch (16).
2. The hand-held optical time domain reflectometer according to claim 1, characterized in that the OTDR interface (8) and the VFL interface (17) each have a bead chain cap (9) clipped to the upper end, the upper end of the bead chain cap (9) being fixedly connected to the bead chain (13) of the housing (18).
3. The hand-held optical time domain reflectometer according to claim 1, characterized in that a bracket fixing base (10) is fixedly mounted at the rear side of the meter back case (2), the bracket fixing base (10) being connected to the bracket (11) by a snap fit.
4. The hand-held optical time domain reflectometer as in claim 1, characterized in that a TPU elastomer (15) is fixedly attached to the inner side of the gauge back case (2).
5. The hand-held optical time domain reflectometer as in claim 1, wherein the power supply (6) forms a closed series circuit with the lamp (14) and the lamp switch (16).
6. The optical time domain reflectometer as in claim 1, wherein the detection component (12) is in signal connection with the PCB board (4), the touch display screen (3) is electrically connected with the PCB board (4), and the silicone key (5) is in signal connection with the PCB board (4).
7. The hand-held optical time domain reflectometer as in claim 1, characterized in that the power supply (6) is a high capacity lithium battery.
8. The hand-held optical time domain reflectometer according to claim 3, characterized in that the lower part of the rear side of the meter back case (2) is recessed inwards, and the support (11) is a rectangular structure parallel to the meter back case (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020452572.4U CN211959210U (en) | 2020-04-01 | 2020-04-01 | Hand-held optical time domain reflectometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020452572.4U CN211959210U (en) | 2020-04-01 | 2020-04-01 | Hand-held optical time domain reflectometer |
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| Publication Number | Publication Date |
|---|---|
| CN211959210U true CN211959210U (en) | 2020-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020452572.4U Active CN211959210U (en) | 2020-04-01 | 2020-04-01 | Hand-held optical time domain reflectometer |
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| CN (1) | CN211959210U (en) |
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- 2020-04-01 CN CN202020452572.4U patent/CN211959210U/en active Active
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