CN107328985A - A kind of new digital distributing frame signal testing device - Google Patents

Abstract

The invention discloses a novel digital distribution frame signal tester, which comprises a metal shell (1), a light-emitting diode (2), and an insulating medium (3). 1) The fixed thread is connected to the digital distribution frame, and the two pins (4) and (5) of the light-emitting diode (2) extend into the metal shell through the top of the metal shell; the pin (4) corresponds to the negative pole of the light-emitting diode , to connect with the metal shell of the tester; the pin (5) corresponds to the anode of the light-emitting diode, the bottom of the pin (5) is connected to the metal body, and the space between the metal shell (1) and the light-emitting diode (2) is filled with an insulating medium (3). It has the characteristics of simple structure, low cost, and can directly and quickly judge the signal of the digital signal channel.

Description

A New Signal Tester for Digital Distribution Frame

technical field

The invention belongs to the technical field of substations, in particular to a novel digital distribution frame signal tester.

Background technique

With the rapid development of smart grids, substations require more and more information bandwidth, digital communication is gradually replacing traditional second-wire, four-wire and other low-speed analog channels as an important means of communication for power communication, and the digital distribution frame that comes with digital communication It is also widely used in substations. In the prior art, the digital distribution frame is used as a convergence point for signal wiring and transfer between communication devices. It is often necessary to test the signal in daily work. Most of the connecting cables are coaxial cables, and the ones used in the substation There are a lot of coaxial cables. At present, there are two main methods of digital signal testing: instrument testing and loopback testing. These two testing methods have one thing in common, that is, there are a lot of extra data to be tested and the test speed is relatively slow. However, the situation faced in actual work is that a large number of tests and operation and maintenance of digital distribution frames and coaxial cables are required. At the same time, it is only necessary to test whether the port has a signal. With digital signals, the work efficiency is not high.

Contents of the invention

The present invention aims to overcome the defects of the prior art, and provides a new digital distribution frame signal tester with simple structure and low cost, which can directly and quickly judge digital signal channel signals and improve operation and maintenance work efficiency.

In order to solve the above technical problems, the present invention provides the following technical solutions:

A new type of digital distribution frame signal tester, including a metal case 1, a light-emitting diode 2, and an insulating medium 3, characterized in that the bottom of the metal case 1 is provided with threads, and the metal case 1 is fixedly threaded and connected to the digital distribution frame to emit light. The two pins 4 and 5 of the diode pass through the top of the metal shell and go deep into the metal shell; pin 4 corresponds to the negative pole of the light-emitting diode and is connected to the metal shell of the tester; pin 5 corresponds to the positive pole of the light-emitting diode, and the bottom of pin 5 is connected to the metal shell of the tester. The metal bodies are connected, and the space between the metal casing 1 and the LED is filled with an insulating medium 3 .

Further, the insulating medium is made of a material with better insulating performance.

Further, the insulation medium resistance is ≥10 ⁶ ohm/meter.

Further, the size of the metal shell 1 matches the jack on the digital distribution frame.

Compared with the prior art, the present invention has the following beneficial effects:

The device of the present invention has the characteristics of simple structure, low cost, safety, reliability, and portability, and is suitable for mass production. It can be tested at each communication node of the communication network, and it is convenient for communication operation and maintenance personnel to judge whether the channel is normal. At the same time, it can also cooperate with the U-shaped head of the digital distribution frame to perform related operations such as uninterrupted communication measurement and loopback measurement, which can significantly reduce the work pressure of operation and maintenance personnel and improve the efficiency of operation and maintenance work.

Through the principle that the level difference can make the diode emit light, the digital signal is tested by using the light-emitting diode. The metal shell is used, and the shell is insulated from the inner core through the shielding layer to ensure that the circuit can work normally.

Description of drawings

Fig. 1 is a structural schematic diagram of a new digital distribution frame signal tester of the present invention.

detailed description

The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

As shown in Figure 1, a new digital distribution frame signal tester includes a metal case 1, a light-emitting diode 2, and an insulating medium 3. There are threads on the bottom of the metal case 1, and the size of the metal case 1 is the same as the jack on the digital distribution frame. Matching to ensure smooth insertion into the digital distribution frame. The metal case 1 is fixedly threaded on the digital distribution frame, and the two pins 4 and 5 of the light-emitting diode extend into the metal case through the top of the metal case; the light-emitting diode is composed of a PN junction, which also has unidirectional conductivity. The forward saturation voltage drop is 1.6-2.1V, the forward working current is 5-20MA, and the luminous color is red. Pin 4 corresponds to the negative pole of the light-emitting diode, which is connected to the metal shell of the tester; pin 5 corresponds to the positive pole of the light-emitting diode, and the bottom of pin 5 is connected to the metal body, which is made of a material with high hardness and good conductivity. It is convenient to plug into the jack of the digital patch panel. In the actual test, insert the signal tester on the cable head, because there is a potential difference between the inner core and the outer shell of the coaxial cable, after connecting the coaxial cable head to the tester, after the forward voltage, according to the characteristics of the light emitting diode, it can make it produce spontaneous emission fluorescence. The space between the metal shell 1 and the light-emitting diode is filled with an insulating medium 3, the insulating medium is made of non-conductive material with good insulation performance, so as to ensure the insulation between the metal shell and the inner core, and the resistance of the insulating medium is ≥ 10 ⁶ ohms/ Meter. The function of the insulating medium is 1. Insulate the inner core and the outer shell of the signal tester. 2. Fill the inside of the signal tester and make the inner core of the tester accurately align with the cable connector.

The invention quickly measures whether there is a digital signal at the port, inserts the tester into the signal sending port of the digital distribution frame, if the diode light is on, it means that there is a signal; if the light is not on, it means that there is no signal. When using the signal test lamp to test, insert it into the port on the signal sending side of the digital distribution frame. Since there is a level difference between the positive and negative poles on the signal sending side, when there is a signal on the sending side, the light-emitting diode 2 will light up; when there is no signal on the sending side , LED 2 does not emit light.

The specific dimensions of the present invention are as follows: the length L of the metal shell is 40 mm, the outer diameter R is 18 mm, and the inner diameter r is 10 mm.

The above is only to illustrate the implementation of the present invention, and is not intended to limit the present invention. For those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention, All should be included within the protection scope of the present invention.

Claims (4)

1. a kind of new digital distributing frame signal testing device, including metal shell (1), light emitting diode (2), dielectric (3), Characterized in that, metal shell (1) bottom offers screw thread, metal shell (1) fixation is threaded on DDF, sent out Two pins (4) of optical diode (2) and (5) are stretched into metal shell through metal shell top；Pin (4) correspondence luminous two The negative pole of pole pipe, is attached with tester metal shell；The positive pole of pin (5) respective leds, pin (5) bottom with Metallic object is connected, filling dielectric (3) in the space between metal shell (1) and light emitting diode (2).

2. new digital distributing frame signal testing device according to claim 1, it is characterised in that dielectric is insulating properties Preferable material is made.

3. new digital distributing frame signal testing device according to claim 1, it is characterised in that dielectric resistance >=10⁶Europe Nurse/rice.

4. new digital distributing frame signal testing device according to claim 1, it is characterised in that metal shell (1) size with Jack is matched on DDF.