CN219811185U

CN219811185U - Signal conversion testing device

Info

Publication number: CN219811185U
Application number: CN202320137981.9U
Authority: CN
Inventors: 余传宝; 崔岺
Original assignee: Suzhou Judu Electronic Technology Co ltd
Current assignee: Suzhou Judu Electronic Technology Co ltd
Priority date: 2023-01-31
Filing date: 2023-01-31
Publication date: 2023-10-10
Anticipated expiration: 2033-01-31

Abstract

The utility model relates to a signal conversion testing device, and belongs to the field of electronic circuits. The signal conversion testing device comprises a lamp shade 1, a box body 2, a PCBA3, a loudspeaker 4, a switch interface 5, a switch power supply 6, a testing interface 7 and a power plug 8; the PCBA3 is respectively connected with the signal conversion circuit, the voice decoding circuit and the audio power amplifier; the signal conversion circuit, the voice decoding circuit and the audio power amplifier are electrically connected in sequence; the audio power amplifier is electrically connected with the loudspeaker; the signal conversion circuit is electrically connected with the LED light-emitting circuit; the signal conversion circuit is electrically connected with the test interface 7; the PCBA3 is arranged inside the lampshade 1; the testing device can effectively detect various signal conversion products; there are voice broadcast and luminous suggestion dual mode foolproof, avoid missing the survey misdetection. A variety of signal conversion products can be tested.

Description

Signal conversion testing device

Technical Field

The utility model belongs to the field of electronic circuits, and relates to a signal conversion testing device.

Background

The intelligent signal interfaces USB TO 485, USB TO 232, USB TO 422 and 232TO 485/422 converters are increasingly popular, the sales of the product serial port converter devices in the market are continuously increased, and relative TO the signal conversion products, the product serial port converter devices lack factory testing equipment after production. At present, a professional test method is lacked for electrical inspection after the serial port industrial level converter is manufactured; the client terminal equipment is directly used for testing, so that the cost is high, the occupied area is large, and foolproof measures are not needed.

Disclosure of Invention

In view of the above, the present utility model is directed to a signal conversion testing device.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the signal conversion testing device comprises a lamp shade 1, a box body 2, a PCBA3, a loudspeaker 4, a switch interface 5, a switch power supply 6, a testing interface 7 and a power plug 8;

in the PCBA3, a DC 24V-DC 5V module is respectively connected with a signal conversion circuit, a voice decoding circuit and an audio power amplifier;

the signal conversion circuit, the voice decoding circuit and the audio power amplifier are electrically connected in sequence;

the signal conversion circuit is electrically connected with the LED light-emitting circuit;

the audio power amplifier is electrically connected with the loudspeaker;

the signal conversion circuit is electrically connected with the test interface 7;

the PCBA3 is arranged inside the lampshade 1;

the speaker 4 is connected to the PCBA3 by data;

the switch power supply 6 is arranged in the box body 2 and is connected with a PCBA power supply circuit for supplying power to the PCBA 3;

the power plug 8 and the switch interface 5 are arranged on the side surface of the box body 2 and supply power for the switch power supply 6;

the test interface 7 is arranged on the front surface of the box body 2 and is connected with the PCBA;

the PCBA power supply circuit comprises a chip XL1509, wherein the chip XL1509 comprises 8 pins, and the pin 1 is connected to +24V input voltage; and one ends of capacitors CIN1 and C2 connected in parallel, and the other ends of CIN1 and C2 are grounded;

pin 2 is connected to the positive output of diode D1, and the positive input of diode D1 is grounded;

pin 3 is connected to +5V voltage; an inductor L1 is connected between the positive output end of the D1 and the pin 3;

the pin 3 is also connected with capacitors CA1, CA2 and C1 which are connected in parallel; one end of the capacitor CA1 is grounded;

pins 5 to 8 are grounded.

Optionally, the box 2 is 150x150x110mm.

The utility model has the beneficial effects that:

(1) Various signal conversion products (including products with and without isolation signals) are effectively detected by the test device.

(2) There are voice broadcast and luminous suggestion dual mode foolproof, avoid missing the survey misdetection.

(3) A variety of signal conversion products can be tested.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in the following preferred detail with reference to the accompanying drawings, in which:

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic illustration of the use of the present utility model;

FIG. 3 is an overall circuit diagram of the present utility model;

FIG. 4 is a circuit diagram of a PCBA;

FIG. 5 is a circuit diagram of signal conversion;

FIG. 6 is a circuit diagram of a speech decoding;

FIG. 7 is a diagram of an LED lighting circuit;

fig. 8 is an audio power amplifier circuit diagram.

Reference numerals: the lamp shade 1, box 2, PCBA3, speaker 4, power interface 5, switching power supply 6, test interface 7, power plug 8.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present utility model by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.

Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the utility model; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present utility model, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.

As shown in fig. 1 to 8, the utility model is a testing device for signal conversion products, which comprises a lampshade 1, a box 2, a PCBA3, a loudspeaker 4, a switch interface 5, a switch power supply 6, a testing interface 7 and a power plug 8.

the audio power amplifier is electrically connected with the loudspeaker;

PCBA3 is a main control circuit and is arranged inside the lampshade;

the loudspeaker is connected to the PCBA3 through a wiring, and the PCBA3 sends out test passing sound through the loudspeaker after receiving a test passing signal;

the switch power supply is arranged in the box body to supply power to the PCBA 3;

the power plug is arranged on the other side of the box body and supplies power for the switching power supply;

the test interface is arranged on the front surface of the box body, is connected with the PCBA3 and transmits test signals;

as shown in fig. 2, 220V voltage is supplied to PCBA3 via switching power supply 6.

When the product TO be tested is a USB TO 232 or USB TO 485 product, one end of the product TO be tested is plugged into a computer, the other end of the product TO be tested is plugged into a testing device, a USB2.0 signal is sent out through the computer, and when the product is good, the testing device lights a green light and simultaneously sends out a sound of passing test and good.

When the product TO be tested is a 232TO 485 or 422 product, a jig head of a USB TO 232 is added at the computer end, a computer is inserted at one end of the product TO be tested, a testing device is inserted at the other end of the product TO be tested, a USB2.0 signal is sent out through the computer, and when the product is a good product, the testing device lights a green light and simultaneously sends out a sound of 'test passing and good product'.

When testing the industrial-grade product with the isolated signal of 232TO 485, the power supply circuit for the product to be tested, which is used for supplying 5V power to the product to be tested independently and converting 24V to 5V power to the product to be tested with the isolated signal, is shown in FIG. 4.

pins 5 to 8 are grounded.

In the utility model, 24V TO 5V is a power supply part, is connected from a switching power supply (220 TO 24), and then is changed into 5V through an IC TO supply power TO other modules. When testing the product to be tested with the isolation signal, since the product to be tested needs to be independently powered by 5V in addition to the input and output of 232 and 485 conventional signals, the 5V power is led out to the connector in front of the box (the connector in front of the box can be replaced or switched depending on what connector is used for the product to be tested), and then the 5V power is independently supplied to the product to be tested through the connector.

The test device has small volume (150 x150x110 mm), has two foolproof modes of voice broadcasting and luminous prompting, and can test a plurality of products of USB TO 485, USB TO 232 and 232TO 485/422.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present utility model, which is intended to be covered by the claims of the present utility model.

Claims

1. The signal conversion testing device is characterized in that: the device comprises a lampshade (1), a box body (2), a PCBA (3), a loudspeaker (4), a switch interface (5), a switch power supply (6), a test interface (7) and a power plug (8);

in the PCBA (3), a DC 24V-DC 5V module is respectively connected with a signal conversion circuit, a voice decoding circuit and an audio power amplifier;

the audio power amplifier is electrically connected with the loudspeaker;

the signal conversion circuit is electrically connected with the test interface (7);

the PCBA (3) is arranged inside the lampshade (1);

the loudspeaker (4) is connected to the PCBA (3) through data;

the switching power supply (6) is arranged in the box body (2) and is connected with the PCBA power supply circuit to supply power to the PCBA (3);

the power plug (8) and the switch interface (5) are arranged on the side surface of the box body (2) to supply power for the switch power supply (6);

the test interface (7) is arranged on the front surface of the box body (2) and is connected with the PCBA;

the PCBA power supply circuit comprises a chip XL1509, wherein the chip XL1509 comprises 8 pins, and the pin 1 is connected to +24V input voltage; one ends of the capacitors CIN1 and C2 are connected in parallel, and the other ends of the capacitors CIN1 and C2 are grounded;

pins 5 to 8 are grounded.

2. The signal conversion testing device according to claim 1, wherein: the size of the box body (2) is 150x150x110mm.