RU174943U1 - RADIO ELECTRONIC UNIT - Google Patents

Abstract

The utility model relates to radio electronics, in particular to electronic electronic data processing tools and control systems for moving objects that are operated under conditions of increased thermodynamic loads with increased requirements for electromagnetic compatibility. The technical result of the claimed utility model is to increase the electromagnetic compatibility of the device. The technical result is achieved in that the electronic unit contains a housing with openings for external connectors made therein, a system board, a bottom cover, a power board, power modules, filter modules, the case is divided into a power section and a system section, in the system section a motherboard is made, a power board is made in the power section, and the power section is separated from the system section by a dividing wall made in the housing, on the dividing wall in the power hour compartment Power modules and filter modules are installed, the upper cover is additionally made, the upper cover, the lower cover and the housing being covered with a three-layer electrically conductive coating. 4 ill.

Description

The utility model relates to radio electronics, in particular to electronic electronic data processing tools and control systems for moving objects that are operated under conditions of increased thermodynamic loads with increased requirements for electromagnetic compatibility.

Known electronic unit (RF Patent No. 151493, IPC H05K 1/11, H05K 1/18, publ. 04/10/2015), adopted for the prototype, comprising a housing with holes made for external connectors, a system board, and a cover bottom, power board, power modules, filter modules.

Disadvantages: the electromagnetic compatibility of the prototype is low, because it creates increased electromagnetic interference, which is the result of insufficient shielding of the device.

It is known that electronic devices, devices and installations operate under the influence of electromagnetic interference. The widespread use of microelectronics, which has an increased susceptibility to electromagnetic interference, requires the stability of technical equipment to electromagnetic effects. The difficulty of increasing the resistance of technical equipment to electromagnetic interference lies in ensuring the noise immunity of the equipment and bringing it into line with the specific electromagnetic operating environment.

The technical problem solved by the creation of the claimed utility model is to eliminate electromagnetic interference that interferes with the correct operation of the device.

The technical result of the claimed utility model is to increase the electromagnetic compatibility of the device.

The technical result is achieved in that the electronic unit contains a housing with openings for external connectors made therein, a system board, a lower cover, a power board, power modules, filter modules, the case is divided into a power section and a system section, in the system section a motherboard is made, a power board is made in the power section, and the power section is separated from the system section by a dividing wall made in the housing, on the dividing wall in the power hour compartment They are equipped with power supply modules and filter modules, an upper cover is additionally made, with the upper cover, the lower cover and the housing coated with a three-layer electrically conductive coating.

The salient features of the claimed utility model are the following features:

- execution of the housing divided into a compartment of the power unit and into the compartment of the system part;

- execution in the compartment of the system part of the system board;

- execution in the compartment of the power part of the power board;

- execution in the housing of the wall of the separation separating the compartment of the power part from the compartment of the system part;

- the implementation of power modules and filter modules on the wall dividing in the compartment of the power unit;

- additionally made top cover;

- the top cover, the bottom cover and the housing are coated with a three-layer electrically conductive coating.

The essence of the utility model, its feasibility and the possibility of industrial application are illustrated by the drawings presented in FIG. 1, 2, 3, 4, where:

In FIG. 1 is a perspective view of a radio-electronic unit (exploded assembly).

In FIG. 2 is a front view of the electronic unit (complete electronic assembly).

In FIG. 3 - section AA of the electronic unit.

In FIG. 4 is a section AA of an electronic block without an image of a system board, power board, power supply module, and filter module.

The numbers in FIG. 1, 2, 3, 4 the following positions are indicated:

1 - housing;

2 - holes for external connectors made in the housing;

3 - external connectors;

4 - system board;

5 - bottom cover;

6 - power section;

7 - compartment system part;

8 - power board;

9 - dividing wall;

10 - power supply modules;

11 - filter modules;

12 - top cover;

13 - fasteners;

14 - conductive coating.

The electronic unit contains a housing 1 (Fig. 1, 2, 3, 4) with holes 2 made in it (Fig. 1, 3, 4) for external connectors 3 (Fig. 1, 2, 3), one system board 4 ( Fig. 1, 3) and five external connectors 3 (Fig. 1, 2, 3) installed on the system board 4 (Fig. 1, 3) by soldering, as well as the bottom cover 5 (Fig. 1, 2, 3 , four). External connectors 3 (Fig. 1, 2, 3) are inserted into the holes 2 (Fig. 1, 3, 4) of the housing 1 (Fig. 1, 2, 3, 4). The housing 1 is divided into compartment 6 (Fig. 4) of the power unit and compartment 7 of the system part. In the compartment 6 of the power unit, a power board 8 is made (Fig. 1, 3). The compartment 6 (Fig. 4) of the power part is separated from the compartment 7 of the system part by a separation wall 9 made in the housing 1 (Fig. 1, 2, 3, 4) by a milling method, i.e. the wall 9 (Fig. 4) dividing and the housing 1 (Fig. 1, 2, 3, 4) are one integral part. On the wall 9 (Fig. 4) of the separation in the compartment 6 (Fig. 4) of the power unit, power supply modules 10 (Fig. 1, 3) and filter modules 11 are installed, providing stable electrical contact. In the compartment 7 of the system part, the motherboard 4 is made (Fig. 1, 3). The cover 12 (Fig. 1, 2, 3, 4) of the upper and the cover 5 of the bottom are made fixed to the housing 1 using fasteners 13 (Fig. 1, 3, 4) - screws 4-12-Cd OST 1 31528-80. Cover 5 (Fig. 1, 2, 3, 4) lower performs the role of the base of the electronic unit. The cover 12 (Fig. 1, 2, 3, 4) is the top, the cover 5 is the bottom and the housing 1 is covered with a three-layer electrically conductive coating 14 (Fig. 4) Chem. N9-15.M3-6.O-Vi6-12 according to GOST 9.303-85. Cover 12 (Fig. 1, 2, 3, 4) is upper, cover 5 is lower and housing 1 is made of corrosion-resistant aluminum alloy AMg6 GOST 17232-99.

During operation of the device, the power board, filter modules, and power supply modules create large electromagnetic interference that affects the correct operation of the system board 4.

In the proposed technical solution, the wall 9 (Fig. 4) is dividing, the cover 12 is upper (Figs. 1, 2, 3, 4), the cover 5 is lower and the housing 1 is covered with a three-layer electrically conductive coating, so each of them acts as an electromagnetic screen, which increases electromagnetic compatibility of the device as a whole.

The device operates as follows.

In the electronic block on the wall 9 (Fig. 3, 4) of the separation housing 1 (Fig. 1, 2, 3, 4) from the compartment 6 (Fig. 4) of the power unit, power supply modules 10 (Fig. 1, 3) are installed and filter modules 11. Then, in the same compartment 6 (Fig. 4) of the power unit, a power board 8 is installed (Figs. 1, 3). The compartment 6 (Fig. 4) of the power unit is closed with a top cover 12 (Fig. 1, 2, 3, 4), which is fixed to the housing 1 with fasteners 13 (Fig. 1, 3, 4). External connectors 3 (Fig. 1, 2, 3) are installed in the system board 4 (Fig. 1, 3) using the POS 61 soldering process according to GOST 21931-76, then the system board 4 (Fig. 1, 3) is installed in compartment 7 (Fig. 4) of the system part so that the external connectors 3 (Fig. 1, 2, 3) enter the holes 2 (Fig. 1, 3, 4). The compartment 7 (Fig. 4) of the system part is fixed with a cover 5 (Fig. 1, 2, 3, 4) lower by means of fasteners 13 (Fig. 1, 3, 4). When applying power, an electric current passes through the filter modules 11 (Figs. 1, 3), thereby reducing impulse noise. Then, the electric current enters the power supply modules 10 (Figs. 1, 3), providing the required value (12.27 V) of the supply voltage. On the power board 8 (Fig. 1, 3) there are electronic components (resistors, capacitors, etc.) that ensure the correct operation of the filter modules 11 (Fig. 1, 3) and power supply modules 10 (the so-called "strapping"). The process of filtering and stabilizing the supply voltage is inevitably accompanied by electromagnetic interference emitted by the power supply modules 10 and the filter modules 11. These electromagnetic interference do not affect the operation of the system board 4 (Fig. 1, 3), because in the proposed technical solution are localized in the shielded compartment 6 (Fig. 4) of the power unit. In this case, the motherboard 4 is also protected from electromagnetic interference from external sources, because located in the shielded compartment 7 of the system part. Shielding in the proposed technical solution is also provided due to the presence of a three-layer electrically conductive coating 14 on the housing 1 (Fig. 1, 2, 3, 4), the cover 12 (Fig. 3, 4), the top cover 5 (Fig. 1, 2, 3 4) bottom. The electrically conductive coating 4 is applied by a galvanic method.

Unlike the prototype, where the case is not divided into separate compartments, the power board is made in the recess of the cover, the power modules and filter modules are made on the system board, in the proposed technical solution the case is divided into the power section and the system section, which are separated from each other the other is a separation wall made in the housing, while the power board is made in the power section, and the system board is made in the system section, the electric modules are installed on the separation wall in the power section power supplies and filter modules, which allows you to localize electromagnetic interference in the compartment of the power unit and not affect the correct operation of the system board, which leads to increased electromagnetic compatibility of the claimed device as a whole.

Unlike the prototype, the presence in the proposed technical solution of an additional top cover made with a three-layer electrically conductive coating, which acts as an electromagnetic screen, reduces the effect of external electromagnetic interference on the device, which leads to an increase in its electromagnetic compatibility.

Unlike the prototype, where the lid and base are made without an electrically conductive coating, in the proposed technical solution, the lower lid and the housing (like the upper lid) are made with a three-layer electrically conductive coating, which increases the electromagnetic compatibility of the device due to the fact that each of the electrically conductive coatings These structural elements plays the role of an electromagnetic screen, this allows you to eliminate electromagnetic interference arising from the operation of the device.

In contrast to the prototype, the specified set of distinctive essential features of the claimed technical solution along with the known from the prior art features provide a technical result, which consists in increasing the electromagnetic compatibility of the device.

The claimed technical problem, which consists in eliminating electromagnetic interference that impedes the correct operation of the device, can be solved by implementing and using a utility model that could not be solved by implementing the closest analogue (prototype) of the claimed technical solution.

In the prior art, no analogue was found, characterized by features identical to all the essential features of the claimed utility model.

The proposed utility model is technically feasible and industrially feasible at the instrument-making enterprise, the tests carried out confirm the achievement of the claimed technical result.

From the foregoing, we can conclude that the proposed technical solution meets the conditions of patentability of a utility model, namely, it is new and industrially applicable.

Claims (1)

A radio electronic unit comprising a housing with openings for external connectors made therein, a system board, a bottom cover, a power board, power modules, filter modules, characterized in that the housing is divided into a power section and a system section, in the system section compartment system board, a power board is made in the compartment of the power section, and the compartment of the power section is separated from the compartment of the system part by a dividing wall made in the housing, mods are installed on the dividing wall in the power section whether the power supply and filter modules is further configured upper cover, the upper cover, lower cover and the housing are covered with a three-layer conductive coating.

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