CN216560765U

CN216560765U - Multichannel high-precision LCR test machine

Info

Publication number: CN216560765U
Application number: CN202122654247.3U
Authority: CN
Inventors: 林忠强
Original assignee: Suzhou Systemtronics Science & Technology Co ltd
Current assignee: Suzhou Systemtronics Science & Technology Co ltd
Priority date: 2021-11-01
Filing date: 2021-11-01
Publication date: 2022-05-17
Anticipated expiration: 2031-11-01

Abstract

The utility model relates to the technical field of LCR (liquid crystal display) testing, and discloses a multichannel high-precision LCR (liquid crystal display) testing machine which comprises a shell, wherein a back connecting plate is fixedly arranged in the middle of the shell, a plurality of scanning cards which are arranged side by side and used for switching a testing channel and measuring cards used for LCR parameter measurement are arranged on two sides of the back connecting plate, the scanning cards and the measuring cards are arranged in opposite number, each scanning card is connected with a scanning interface used for connecting a component to be tested, and the scanning cards are in electrical signal connection with the measuring cards through the back connecting plate. The device of the utility model uses a main control board to connect 13 measuring cards and 13 scanning boards, can realize synchronous measurement of 13 measuring cards, the measuring cards can be corresponding to one scanning board or multiple scanning boards at will, the device is flexible to use, can simultaneously measure multiple groups of elements to be measured, and improves the detection efficiency.

Description

Multichannel high-precision LCR test machine

Technical Field

The utility model relates to the field of LCR testing, in particular to a multi-channel high-precision LCR testing machine.

Background

Along with the development of electronic technology, the functions of electronic devices used by people are more and more, and are generally realized in a mode of combining hardware and software, the existing hardware for scanning is generally integrated on a certain PCB (printed circuit board), and particularly, when LCR (L inductance, C capacitance and R resistance) is detected, the existing hardware cannot be detached and replaced, and is very inconvenient to use, and the existing testing machine can only be connected with two poles of one element at a time, namely, the parameter of one element can only be measured at a time, so that the detection efficiency is low.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a multichannel high-precision LCR tester, which can simultaneously measure a plurality of groups of data, improves the detection efficiency and is convenient to overhaul and replace.

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

a multi-channel high-precision LCR tester comprises a shell, wherein a back connecting plate is fixedly mounted in the middle of the shell, a plurality of scanning cards which are arranged side by side and used for switching a testing channel and measuring cards used for LCR parameter measurement are arranged on two sides of the back connecting plate, the number of the scanning cards and the number of the measuring cards are arranged oppositely, each scanning card is connected with a scanning interface used for connecting an element to be tested, and the scanning cards are in electrical signal connection with the measuring cards through the back connecting plate.

In the utility model, further, the measuring card is fixed on the shell through a measuring mounting plate, a main control board is arranged at the lower part of the measuring mounting plate, the main control board is in electric signal connection with the back connecting plate, the main control board is fixed on a main control connecting plate, and the main control connecting plate is fixed on the shell.

In the present invention, the main control connection board is L-shaped, and includes an interface panel and a main board mounting board, the interface panel is disposed on the outer side of the housing, and the main board mounting board is disposed on the inner side of the housing.

In the present invention, further, the interface panel is provided with a USB interface, a DIO interface and an ethernet port.

In the utility model, further, an internal mounting plate is arranged on the upper side of the main control plate, a module power supply is arranged between the internal mounting plate and the measurement mounting plate, and the module power supply is fixed on the internal mounting plate and used for supplying power to a testing machine.

In the present invention, a filter is further fixed at the bottom of the housing, and the filter is in electrical signal connection with the main control board.

In the utility model, further, the scanning interface is fixedly connected with a strip-shaped plate, and the upper end and the lower end of the strip-shaped plate are fixed on the shell through hand-screwed screws.

In the utility model, preferably, a plurality of heat dissipation fans are arranged on the upper side of the main control board, the heat dissipation fans are fixed in the shell, a plurality of air induction ports are arranged on the shell, and the air induction ports are opposite to the heat dissipation fans.

In the present invention, it is preferable that the number of the scan card and the measurement card is at most 13.

Compared with the prior art, the utility model has the beneficial effects that:

the device of the utility model uses a main control board to connect 13 measuring cards and 13 scanning boards, can realize synchronous measurement of 13 measuring cards, the measuring cards can be corresponding to one scanning board or multiple scanning boards at will, the device is flexible to use, can simultaneously measure multiple groups of elements to be measured, and improves the detection efficiency. Simultaneously, this scheme makes device overall structure compact through reasonable overall arrangement, reduces the volume of test machine. In addition, every scanning card and measurement card of this scheme all install alone, are convenient for maintain and overhaul the operation.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a general schematic diagram I of a multi-channel high precision LCR tester of the present invention;

FIG. 2 is a schematic diagram of a portion of a multi-channel high precision LCR tester according to the present invention;

FIG. 3 is a general schematic diagram II of a multi-channel high precision LCR tester of the present invention;

FIG. 4 is a schematic diagram of a main control board structure of a multi-channel high-precision LCR tester according to the present invention;

in the figure: 1. scanning the card; 2. a back connection plate; 3. measuring a card; 4. a main control board; 5. a module power supply; 6. a filter; 7. a housing; 8. measuring the mounting plate; 9. a main control connecting plate; 90. an interface panel; 91. a main board mounting plate; 10. a USB interface; 11. a DIO interface; 12. an Ethernet port; 13. an inner mounting plate; 14. a strip plate; 15. a heat radiation fan; 16. and an air inducing port.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, a preferred embodiment of the present invention provides a multichannel high-precision LCR tester, which includes a housing 7, the housing 7 is formed by connecting a bottom plate and a plurality of fixing plates, an outer cover may be disposed outside the housing, a back connecting plate 2 is fixedly mounted in the middle of the housing 7, a plurality of scan cards 1 for switching test channels and measurement cards 3 for LCR parameter measurement are disposed on two sides of the back connecting plate 2, the scan cards 1 and the measurement cards 3 are disposed in opposite numbers, each scan card 1 is connected to a scan interface for connecting a device to be tested, and the scan card 1 is electrically connected to the measurement cards 3 through the back connecting plate 2.

Specifically, scanning interface fixedly connected with strip shaped plate 14, both ends are fixed through hand screw on the casing 7 about the strip shaped plate 14, can be when certain scanning card 1 breaks down like this, and the accessible is direct to be demolishd strip shaped plate 14, alright look over corresponding scanning card 1's state.

The scanning interface is used for connecting a product to be tested, the scanning card 1 is mainly used for switching a measuring channel, the measuring card 3 is mainly used for carrying out LCR (liquid crystal display) testing, and the main control board 4 is used for controlling the action flows of the scanning card 1 and the measuring card 3. Through the experiment of the applicant, under the condition of ensuring the running speed of the system, the scheme can control through one main control card, can configure 13

scanning cards

1 and 13 measuring cards 3, and the scanning cards 1, the measuring cards 3 and the main control board 4 can all carry out signal switching through the back connecting board 2, so that the synchronous measurement of the 13 measuring cards 3 can be realized, the measuring cards 3 can arbitrarily correspond to one scanning board or a plurality of scanning boards, the flexible application is realized, a plurality of groups of elements to be measured can be measured simultaneously, and the detection efficiency is improved.

In the present invention, as shown in fig. 3, the measuring card 3 is fixed on the housing 7 through a measuring mounting plate 8, a main control board 4 is disposed at a lower portion of the measuring mounting plate 8, and the main control board 4 is in electrical signal connection with the back connecting plate 2. The main control board 4 is used as a control core of the whole device and is used for controlling the whole detection process. The main control board 4 integrates a USB module and a network communication module, and can realize communication between the device and external devices.

As shown in fig. 2 and 4, the main control board 4 is fixed to a main control connection board 9, and the main control connection board 9 is fixed to the housing 7. Specifically, main control connecting plate 9 is L shape, including interface panel 90 and mainboard mounting panel 91, interface panel 90 sets up the casing 7 outside, mainboard mounting panel 91 sets up casing 7 is inboard.

The main board mounting plate 91 is disposed inside the housing 7 for fixing the main control board 4, and the interface panel 90 is disposed outside the housing 7 for communicating with the outside. The interface panel 90 is mainly provided with a USB interface 10, a DIO interface 11 and an ethernet port 12, the USB interface 10, the DIO interface 11 and the ethernet port 12 are all electrically connected with the main control board 4, the USB interface 10 is mainly used for realizing communication with an external display screen and PC equipment, the DIO interface 11 is used for completing work such as software downloading of the main control board 4, and the ethernet port 12 is used for realizing networking and completing information exchange.

In the utility model, further, an internal mounting plate 13 is arranged on the upper side of the main control plate 4, a module power supply 5 is arranged between the internal mounting plate 13 and the measurement mounting plate 8, and the module power supply 5 is fixed on the internal mounting plate 13 and used for supplying power to a testing machine.

In the present invention, further, a filter 6 is further fixed at the bottom of the housing 7, and the filter 6 is electrically connected to the main control board 4. The filter 6 is used for filtering interference sources in the signals to obtain the required frequency band signals.

In the present invention, preferably, the upper side of the main control board 4 is provided with a plurality of heat dissipation fans 15, the heat dissipation fans 15 are fixed inside the casing 7, the casing 7 is provided with a plurality of air induction ports 16, and the air induction ports 16 are arranged opposite to the heat dissipation fans 15. Specifically, the induced air ports 16 are disposed on the upper side of the interface panel 90, in this embodiment, four induced air ports 16 are uniformly disposed outside the housing 7, and a filter screen is disposed at the induced air ports 16 to prevent the large particles of impurities from entering. When the temperature sensor detects that the temperature in the shell 7 is too high, the main control board 4 starts the heat radiation fan 15 to radiate the device, so that the normal use of internal devices is ensured.

In addition, this scheme makes device overall structure compact, reduces the volume of test machine through the reasonable overall arrangement of devices such as scanning card 1, measuring card 3, back connecting plate 2, main control board 4 and module power 5.

In the present embodiment, it is preferred that,

the working principle is as follows:

the product to be tested is connected into the tester through the scanning interface, the power supply is started, the main control board 4 firstly synthesizes a sine test signal, the signal is filtered through the filter 6, the measurement signal is respectively switched to the measurement card 3 and the scanning card 2 through the back connecting board 2, wherein the measurement card 3 is used for measuring the signal, and the scanning board is used for transmitting the scanned signal to the product to be tested and driving the product to be tested. The detection signal of the product to be detected is transmitted to the back connecting plate 2 through the scanning card 1, finally the signal is fed back to the measuring card 3, the measuring card 3 carries out calculation and analysis on the measured parameter, the analyzed data is transmitted to the main control board 4, the USB interface 10 of the main control board 4 is connected with devices such as a display screen, and the detected data is displayed.

The above description is intended to describe in detail the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention, and all equivalent changes and modifications made within the technical spirit of the present invention should fall within the scope of the claims of the present invention.

Claims

1. The utility model provides a high-accuracy LCR test machine of multichannel, its characterized in that, includes casing (7), the middle part fixed mounting of casing (7) has back connecting plate (2), the both sides of back connecting plate (2) are equipped with a plurality of being used for that set up side by side switches scanning card (1) and be used for LCR parameter measurement's measurement card (3) to the test channel, scanning card (1) with the quantity of measurement card (3) sets up relatively, every all connect the scanning interface that is used for connecting the element to be measured on scanning card (1), scanning card (1) pass through back connecting plate (2) with measurement card (3) signal connection.

2. A multi-channel high-precision LCR tester according to claim 1, wherein the measurement card (3) is fixed on the casing (7) through a measurement mounting plate (8), a main control board (4) is provided at the lower part of the measurement mounting plate (8), the main control board (4) is electrically connected with the back connection plate (2), the main control board (4) is fixed on a main control connection plate (9), and the main control connection plate (9) is fixed on the casing (7).

3. A multi-channel high-precision LCR tester as set forth in claim 2, wherein the main control connection board (9) is L-shaped and comprises an interface panel (90) and a main board mounting board (91), the interface panel (90) is disposed outside the housing (7), and the main board mounting board (91) is disposed inside the housing (7).

4. A multi-channel high-precision LCR tester as set forth in claim 3, wherein the interface panel (90) is provided with a USB interface (10), a DIO interface (11), and an ethernet port (12).

5. The multichannel high-precision LCR testing machine as set forth in claim 2, wherein an internal mounting plate (13) is provided on the upper side of said main control plate (4), a module power supply (5) is provided between said internal mounting plate (13) and said measuring mounting plate (8), and said module power supply (5) is fixed on said internal mounting plate (13) for supplying power to the testing machine.

6. A multi-channel high-precision LCR tester according to claim 2, wherein a filter (6) is fixed on the bottom of the housing (7), and the filter (6) is electrically connected to the main control board (4).

7. The multichannel high-precision LCR testing machine as set forth in claim 1, wherein said scanning interface is fixedly connected with a strip-shaped plate (14), and the upper and lower ends of said strip-shaped plate (14) are fixed on said casing (7) by hand screws.

8. The multichannel high-precision LCR testing machine as set forth in claim 2, wherein said main control board (4) is provided with a plurality of heat dissipation fans (15) at the upper side thereof, said heat dissipation fans (15) are fixed inside said casing (7), said casing (7) is provided with a plurality of air induction ports (16), and said air induction ports (16) are disposed opposite to said heat dissipation fans (15).

9. A multi-channel high precision LCR tester as set forth in claim 1, characterized in that the number of scan cards (1) and measurement cards (3) is at most 13.