CN213275918U - Mini-type subscriber line checking and testing tool for communication - Google Patents

Abstract

The utility model discloses a test tool is checked to miniature communication subscriber line, including main box and supplementary box, main box bottom inner wall fixedly connected with circuit board, circuit board top outer wall fixedly connected with battery tray, and battery tray inner wall joint have the battery, on the circuit board respectively fixedly connected with bridge rectifier circuit module, resistance R and LED lamp, the anodal electric connection of bridge rectifier circuit module is on the LED lamp is positive, and the LED lamp negative pole is connected on the negative pole of bridge rectifier circuit module. The utility model discloses select for use circuit element less, the test is main and auxiliary box and is formed by ready-made telephone terminal box transformation, and the core component material obtains easily, and the display lamp consumption is little longe-lived, has maintainability, and it is convenient safe in utilization.

Description

Mini-type subscriber line checking and testing tool for communication

Technical Field

The utility model relates to the technical field of communication, in particular to a checking and testing tool for mini communication subscriber lines; the method is also suitable for checking and testing electrical and thermal control cables.

Background

During communication user line engineering and daily maintenance work, communication staff must check and test the on and off of core wires to establish complete and accurate user line distribution data and ensure completion and transfer data and user line maintenance and repair. The current user line core wire testing tool mainly comprises a special user line testing instrument or a universal meter, a low-voltage megger (less and dangerous, and the user line equipment end needs to be completely disconnected) and other tools, and a small testing telephone (bread style) is also commonly used for replacing the checking and testing work of the user line in the actual work.

As communication working technicians, in the work of user line construction and maintenance, although a user line testing instrument or a universal meter and other tools are used for testing, the instrument and the instrument are large in size and heavy, and sometimes the instrument and the instrument are inconvenient to carry to a field for use; especially, under the condition that no power supply is available on a construction site, the special instrument is inconvenient to use; and under the condition of no special test line, the test by using a universal meter is inconvenient. If a universal meter is used in an office to test the on-line circuit, the wall socket panel needs to be detached, and the meter pen contacts the subscriber line bare chip to unidirectionally test the on-off of the on-line circuit; in addition, most of the telephone-to-wall panel socket lines on the desktop are connected with two-core crystal heads, and a multimeter is used for testing that the wire core to be tested is difficult to contact due to the thick pen point of the meter. The bread phone can check and test the on-off of the circuit by listening to the dial tone under the condition of buzz, and is not sensitive under the condition of no circuit buzz.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcomings existing in the prior art, and the mini communication subscriber line checking test tool is provided.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

miniature communication is with subscriber line check testing tool, including main box and supplementary box, main box bottom inner wall fixedly connected with circuit board, circuit board top outer wall fixedly connected with battery tray, and battery tray inner wall joint has the battery, on the circuit board respectively fixedly connected with bridge rectifier circuit module, resistance R and LED lamp, the anodal electric connection of bridge rectifier circuit module is on the LED lamp is positive, and the LED lamp negative pole is connected on the negative pole of bridge rectifier circuit module.

Preferably, the outer wall of one side of the auxiliary box is fixedly connected with a two-core crystal head socket, and the flat cable in the auxiliary box is in short circuit connection.

Preferably, the bridge rectifier circuit module is a patch bridge stack HD 06.

Preferably, the main cassette has a format of 53 × 35 × 24mm, and the auxiliary cassette has a format of 47 × 33 × 20 mm.

The utility model has the advantages that:

1. the small button cell is used for power supply, and the patch bridge stack is used as a polarity orientation circuit to light the light-emitting diode. The existing socket, shell and internal space of telephone terminal box are used to contain microcircuit plate, and special test wire is additionally arranged. And the check test of the subscriber line for communication is finished conveniently. The test judgment work can also be carried out on the subscriber line which is already electrified (24-48v) to operate.

2. From the VDF distribution frame in the factory to telephone access line itself on the desktop, can take single segmentation test, whole journey is surveyed, office decoration, table position adjustment for the wall is to desktop wiring change, need follow new unwrapping wire, be used for testing the two heart yearns of water receiving crystal head contact good or bad, small to can adorn the pocket in, battery long service life, it is convenient to change, the cost is low, the finished product is small and exquisite, facilitate the use, can artificial the restoration during self trouble.

Drawings

Fig. 1 is a circuit diagram of the main line box and the auxiliary line box of the mini communication subscriber line checking and testing tool of the present invention when the main line box and the auxiliary line box are connected to a subscriber line for testing;

FIG. 2 is a circuit diagram of a subscriber cable testing tool for checking miniature communication subscriber lines according to the present invention when there is no line voltage;

FIG. 3 is a circuit diagram of any subscriber line of the main box access main distribution frame of the mini communication subscriber line checking and testing tool of the present invention;

fig. 4 is a circuit diagram of the mini communication subscriber line checking and testing tool of the present invention, which is connected in series with the subscriber line voltage E and the battery voltage in opposite polarities.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-4, miniature communication subscriber line checks test tool, including main box and assistance box, main box bottom inner wall fixedly connected with circuit board, circuit board top outer wall fixedly connected with battery holder, and battery holder inner wall joint has the battery, on the circuit board respectively fixedly connected with bridge rectifier circuit module, resistance R and LED lamp, the anodal electric connection of bridge rectifier circuit module is on the LED lamp is positive, the LED lamp negative pole passes through resistance R and connects on the negative pole of bridge rectifier circuit module, the negative pole electric connection of battery is on the bridge rectifier circuit module, one side outer wall fixedly connected with two-core quartzy first socket of auxiliary box, and the short circuit winding displacement in assisting the box is connected, bridge rectifier circuit module is paster bridge pile HD06, the specification of main box is 53 x 35 x 24mm, and the specification of assisting the box is 47 x 33 x 20 mm.

The utility model discloses in, design this subscriber line testing tool, operating current will be less than subscriber line normal operating current far, and general switch circuit current is less than 1 ampere and is fuse fusing current promptly, ensures that testing tool can not bring the potential safety hazard for the exchange equipment.

The LED display lamp has the advantages that the LED display lamp is used, the power consumption is ultra-low (a single tube is 0.03-0.06 watt), the working voltage is low by 2-3.6V (only a few volts in some), and the working current is 0.02-0.03A (only a few milliamperes in some can emit light), so that the LED display lamp is manufactured by utilizing the characteristics, and the LED display lamp is high in reliability and long in service life.

Selecting a current-limiting resistor and power:

when the current-limiting resistor is selected to be 910 Ω, a 3V power supply is adopted, and the theoretical calculation value is as follows:

the resistance power is very low, I-V/R-3/910-0.0033A-3.3 ma, p-V/R-3-3/910-0.0098W, and this time, 1/2W margin is selected.

The circuit selects a CR2032 battery as a main box power supply:

the nominal battery capacity C of the CR2032 battery is 210mah, and the domestic C is more than or equal to 230 mah; CR2032 was used by 2016 to today for main cell batteries, where the battery voltage had dropped to 2.33v and the current limiting resistance was 910 Ω. The battery voltage is under the action of 2.33v, and the current tested when ab line analog resistance (a line resistance is r1, b line resistance is r2) is different is:

r 1-r 2-510 Ω i-0.7 ma shows clearly

r 1-r 2-1100 Ω (and SPC exchange subscriber line loop resistance <2000 Ω standard) i-0.4 ma shows normality

r 1-r 2-0 Ω i-4 ma shows clearly

CR2032 test usage time calculation:

according to 210mah, the continuous service time of the battery is t, and the wire pair single-wire resistance is 510 omega, and t is 210/0.7 is 300 hours. The wire pair single wire resistance 1100 Ω (and the subscriber line loop resistance of the SPC exchange <2000 Ω standard), t is 210/0.4 is 525 hours; the line is short-circuited, t is 210/4 is 52.5 hours, and the actual user line test is intermittent pulse and short in action time, so that the service life of the battery is long, and the characteristics of high reliability and long service life that the light-emitting tube is just a few volts, and a few milliamperes can emit light are verified.

The main box is accessed to any subscriber line of the main distribution frame:

the actual test user line voltage E cross is 45.4v, the line voltage is the same polarity as the main cell voltage E cell and is connected in series, E0 is the input bridge stack voltage.

In a VDF distribution frame, a main test box is connected with a user side, the ab line resistance is that r1 is that r2 is that 0 omega, the exchanger user line voltage E is connected with a main test box voltage E pool in series and added to 45+2.33 is that 47.33V, and the voltage supplies power to Led brightly; the test current is 33ma, and the discharge together with the battery is realized, and the current limiting resistor consumes power at the moment:

P＝I2R＝0.033*0.033*910＝0.999w

when the user line voltage E crosses the battery voltage in series with the opposite polarity:

r 1-r 2-0 omega, when the main test box is connected with the user side of the vdf distribution frame, the user line voltage E is serially subtracted from the test box voltage by 45-2.33-42.67 v, and the LED is supplied with power, and the current is 32.8ma, and the lamp is bright.

The current limiting resistor consumes power at this time: P2R ═ 0.0328 ═ 910 ═ 0.979w

Through the test analysis, when the main box is connected to a communication operation line for testing, the current generated in the box is the largest, the current range exceeds the normal working current of the light-emitting diode by 20-30ma, but the current range is smaller than the maximum pulse current of Led by 100ma, the action time is short, and the damage is avoided, so that the current-limiting resistance is increased to be 1.5k omega/(3-5 w), and the safety requirements of line voltage (except 60 v) and no voltage test can be met. The whole circuit is safe to use

The working principle is as follows: by using ohm's law, the battery voltage is applied to the communication line, and a loop is formed by the resistor, the short circuit contact, the directional circuit module, the display lamp and the series current-limiting resistor, and current is generated in the loop to make the lamp emit light, so as to judge whether the core wire pair is on or off; the patch bridge stack HD06 is a bridge rectifier circuit module, realizes the directional action on the positive and negative polarities of a communication line, ensures that the polarity of an LED display lamp is required to be normally displayed, and has the functions of a current-limiting resistor and a protection circuit. When the test line pairs are connected, the ab user line is connected into the main box and the auxiliary box circuit, the positive pole of the power supply E, the user line core line b, the short circuit line in the auxiliary box, the user line core line a, the pin 1 of the bridge stack, the positive pole (+), the display lamp Led (+), the R resistor, the negative pole (-) of the bridge stack, the pin 2 of the bridge and the negative pole of the battery E form a conduction loop, and the display lamp Led is on to indicate that the line pairs are normal.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (4)

1. Miniature communication is with subscriber line check testing tool, including main box and supplementary box, its characterized in that, main box bottom inner wall fixedly connected with circuit board, circuit board top outer wall fixedly connected with battery tray, and battery tray inner wall joint has the battery, on the circuit board respectively fixedly connected with bridge rectifier circuit module, resistance R and LED lamp, the anodal electric connection of bridge rectifier circuit module is on the LED lamp is positive, and the LED lamp negative pole is connected on the negative pole of bridge rectifier circuit module.

2. The miniature communication subscriber line verification test tool of claim 1, wherein a two-core crystal head socket is fixedly connected to an outer wall of one side of the auxiliary box, and the flat cable in the auxiliary box is short-circuited.

3. The miniature communication subscriber line verification test tool of claim 1, wherein said bridge rectifier circuit module is a chip bridge rectifier HD 06.

4. The miniature subscriber line verification test tool of claim 1, wherein said main box has a dimension of 53 x 35 x 24mm and said auxiliary box has a dimension of 47 x 33 x 20 mm.

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