CN108132408A - Detection circuit and electronic equipment - Google Patents

Abstract

The present invention provides a kind of detection circuit and electronic equipment.The detection circuit is applied to electronic equipment, and the electronic equipment includes mainboard and subplate.The circuit includes voltage detection unit and first eats dishes without rice or wine detection unit, and the described first detection unit of eating dishes without rice or wine includes the first detection sub-unit, the second detection sub-unit and the first connection subelement.First detection sub-unit is arranged on the mainboard；Second detection sub-unit is arranged on the subplate.First detection sub-unit is electrically connected by the described first connection subelement with second detection sub-unit.The voltage detection unit is electrically connected between the first connection subelement and second detection sub-unit, for detecting the voltage signal between the first connection subelement and second detection sub-unit.It can be realized by above-mentioned setting and eat dishes without rice or wine to detect for what two boards designed.

Description

Detection circuit and electronic equipment

technical field

The present invention relates to the technical field of communications, in particular to a detection circuit and electronic equipment.

Background technique

At present, the air interface detection circuit is arranged on the main board of the electronic device, and the air interface detection circuit includes a radio frequency test socket, and then completes the air interface detection based on the special structure of the radio frequency test socket. However, when the air interface detection circuits are distributed on two boards, the air interface detection designed for the two boards cannot be performed based on the radio frequency test socket.

Contents of the invention

In order to overcome the above-mentioned shortcomings in the prior art, the purpose of the embodiments of the present invention is to provide a detection circuit and electronic equipment, which can realize the air hole detection for the design of two boards.

An embodiment of the present invention provides a detection circuit, which is applied to electronic equipment. The electronic equipment includes a main board and a sub-board. The circuit includes a voltage detection unit and a first air interface detection unit. The first air interface detection unit includes a first detection unit. a subunit, a second detection subunit and a first connection subunit;

The first detection subunit is arranged on the main board;

The second detection subunit is arranged on the sub-board;

The first detection subunit is electrically connected to the second detection subunit through the first connection subunit;

The voltage detection unit is electrically connected between the first connection subunit and the second detection subunit for detecting a voltage signal between the first connection subunit and the second detection subunit .

In the embodiment of the present invention, when the voltage detected by the voltage detection unit is within the first preset range, the first air interface detection unit is in the air interface detection state; the voltage detected by the voltage detection unit is within the second preset range. Within a predetermined range, the first air gap detection unit is in a conduction detection state, wherein the minimum value of the second preset range is greater than the maximum value of the first preset range.

In the embodiment of the present invention, the first connection subunit includes a first antenna connector, a second antenna connector and a radio frequency line;

The first detection subunit is electrically connected to the second detection subunit via the first antenna connector, the radio frequency line, and the second antenna connector in sequence, wherein the first antenna connector is arranged on the On the main board, the second antenna connector is arranged on the sub-board.

In an embodiment of the present invention, the first detection subunit includes a first radio frequency signal input terminal, a first capacitor, and a first inductor, and the second detection subunit includes a second capacitor and a first antenna;

The first radio frequency signal input end is electrically connected to the first antenna via the first capacitor, the first antenna connector, the radio frequency line, the second antenna connector, and the second capacitor in sequence;

One end of the first inductor is electrically connected between the first capacitor and the first antenna connector, and the other end is grounded.

In the embodiment of the present invention, the voltage detection unit includes a GPIO pin, a third capacitor, a second inductor and a third connection subunit,

The GPIO pin and the third capacitor are arranged on the main board;

The second inductor is arranged on the sub-board;

The GPIO pin is electrically connected between the second capacitor and the second antenna connector via the third connection subunit and the second inductor in turn;

One end of the third capacitor is electrically connected between the GPIO pin and the third connection subunit, and the other end is grounded.

In the embodiment of the present invention, the third connection subunit includes a first board-to-board connector, a second board-to-board connector and a flexible circuit board,

The first board-to-board connector is disposed on the main board;

The second board-to-board connector is disposed on the sub-board;

The GPIO pin is electrically connected between the second capacitor and the second antenna connector through the first board-to-board connector, the flexible circuit board, the second board-to-board connector, and the second inductor in turn. between.

In the embodiment of the present invention, the circuit further includes a second air interface detection unit and a sixth capacitor, the second air interface detection unit is arranged on the main board,

The second air interface detection unit includes a second radio frequency signal input terminal, a fourth capacitor, a test seat, a fifth capacitor, a second antenna and a third inductor;

The second radio frequency signal input end is electrically connected to the second antenna via the fourth capacitor, the test seat, and the fifth capacitor in turn;

One end of the third inductor is electrically connected between the fourth capacitor and the test socket, and the other end is grounded through the sixth capacitor.

In the embodiment of the present invention, the voltage detection unit further includes a fourth inductor,

The GPIO pin is electrically connected to the first board-to-board connector via the fourth inductor, the test socket, and the third inductor in sequence.

In the embodiment of the present invention, the test socket and the first antenna connector are also used to electrically connect with a radio frequency test line for conduction test.

An embodiment of the present invention also provides an electronic device, which includes a main board, a sub-board, and any one of the detection circuits described above.

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

Embodiments of the present invention provide a detection circuit and electronic equipment. The circuit is applied to electronic equipment, and the electronic equipment includes a main board and a sub board. The circuit includes a voltage detection unit and a first air interface detection unit. The first air interface detection unit includes a first detection subunit, a second detection subunit and a first connection subunit. The first detection sub-unit is arranged on the main board, and the second detection sub-unit is arranged on the sub-board. The first detection subunit is electrically connected to the second detection subunit through the first connection subunit. The voltage detection unit is electrically connected between the connection subunit and the second detection subunit for detecting a voltage signal between the first connection subunit and the second detection subunit. Thereby, the void detection for the two-board design can be realized.

In order to make the above objects, features and advantages of the invention more comprehensible, the preferred embodiments of the present invention will be described in detail below together with the accompanying drawings.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

FIG. 1 is a schematic block diagram of a detection circuit provided by an embodiment of the present invention.

Fig. 2 is one of the schematic diagrams of the detection circuit provided by the embodiment of the present invention.

Fig. 3 is the second schematic diagram of the detection circuit provided by the embodiment of the present invention.

FIG. 4 is the third schematic diagram of the detection circuit provided by the embodiment of the present invention.

Icons: 100-detection circuit; 110-first air interface detection unit; 111-first detection subunit; 112-second detection subunit; 113-first connection subunit; 140-voltage detection unit.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is usually placed when the product of the invention is used, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", and it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation", "installation", "connection" and "connection" should be understood in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Some embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

Please refer to FIG. 1 . FIG. 1 is a schematic block diagram of a detection circuit 100 provided by an embodiment of the present invention. The detection circuit 100 is applied to an electronic device, and the electronic device may be, but not limited to, a smart phone, a tablet computer, and the like. The electronic equipment includes a main board and a sub board. The detection circuit 100 may include a first air interface detection unit 110 and a voltage detection unit 140 .

In this embodiment, the first air interface detection unit 110 may include a first detection subunit 111 , a second detection subunit 112 and a first connection subunit 113 . The first detection sub-unit 111 is disposed on the main board, the second detection sub-unit 112 is disposed on the sub-board, and the first detection sub-unit 111 is connected to the first detection sub-unit 113 through the first connection sub-unit 113 The second detecting subunit 112 is electrically connected. The voltage detection unit 140 is electrically connected between the first connection subunit 113 and the second detection subunit 112 for detecting the first connection subunit 113 and the second detection subunit 112 Through the above settings, the voltage signal between the two boards can realize the air interface detection of the design.

In this embodiment, when the voltage detected by the voltage detection unit 140 is within a first preset range, the first air interface detection unit 110 is in an air interface detection state. When the voltage detected by the voltage detection unit 140 is within the second preset range, the first air hole detection unit 110 is in a conduction detection state. Wherein, the minimum value of the second preset range is greater than the maximum value of the first preset range. The first preset range and the second preset range can be set according to actual conditions.

For example, when the voltage detected by the voltage detection unit 140 is at a low level within a first preset range, it means that the first air interface detection unit 110 is in an air interface detection state. When the voltage detected by the voltage detection unit 140 is at a high level within the second preset range, it means that the first air hole detection unit 110 is in a conduction detection state.

Please refer to FIG. 2 . FIG. 2 is one of schematic diagrams of a detection circuit 100 provided by an embodiment of the present invention. The first connection subunit 113 may include a first antenna connector, a second antenna connector and a radio frequency (RF Cable). The first antenna connector is arranged on the main board, and the second antenna connector is arranged on the sub-board. The first antenna connector is electrically connected to the first detection subunit 111, the second antenna connector is electrically connected to the second detection subunit 112, and the first antenna connector passes through the The radio frequency wire is electrically connected with the second antenna connector. Through the above settings, the first detection subunit 111 is electrically connected to the second detection subunit 112 via the first antenna connection, the radio frequency line, and the second antenna connector in sequence, realizing the first air interface detection The electrical connection of each part of the unit 110.

In this embodiment, the first detection subunit 111 may include a first radio frequency signal input terminal, a first capacitor C1, and a first inductor L1, and the second detection subunit 112 may include a second capacitor C2 and a first Antenna ANT1. One end of the first capacitor C1 is electrically connected to the first radio frequency signal input end, and the other end is electrically connected to the first antenna connector. One end of the second capacitor C2 is electrically connected to the second antenna connector, and the other end is electrically connected to the first antenna ANT1 . Through the above setting, the first radio frequency signal input terminal is electrically connected to the first antenna ANT1 via the first capacitor C1, the first antenna connector, the radio frequency line, the second antenna connector, and the second capacitor C2 in sequence . Wherein, one end of the first inductor L1 is electrically connected between the first capacitor C1 and the first antenna connector, and the other end is grounded.

In this embodiment, the voltage detection unit 140 includes a GPIO pin, a third capacitor C3 , a second inductor L2 and a third connection subunit. The GPIO pin and the third capacitor C3 are set on the main board, and the second inductor L2 is set on the sub-board. One end of the third connection subunit is electrically connected to the GPIO pin, and the other end is electrically connected to the first air interface detection unit 110 via the second inductor L2. Thus, the GPIO pin is electrically connected between the second capacitor C2 and the second antenna connector through the third connection subunit and the second inductor L2 in turn. Wherein, one end of the third capacitor C3 is electrically connected between the GPIO pin and the third connection subunit, and the other end is grounded.

In this embodiment, the third connection subunit includes a first board-to-board connector (B to B1), a second board-to-board connector (B to B2) and a flexible printed circuit (FPC) . The first board-to-board connector (B to B1) is arranged on the main board, and the second board-to-board connector (B to B2) is arranged on the sub-board. The GPIO pins are sequentially electrically connected to the first board-to-board connector (B to B1), the flexible circuit board, the second board-to-board connector (B to B2), and the second inductor L2. Between the second capacitor C2 and the second antenna connector.

In a normal complete machine state, the first radio frequency signal is radiated to the first antenna ANT1 through the first capacitor C1, the first antenna connector, the radio frequency line, the second antenna connector, and the second capacitor C2 in sequence. The GPIO pins sequentially pass through the first board-to-board connector (B to B1), the flexible circuit board, the second board-to-board connection (B to B2), the second inductor L2, the second antenna connector, the radio frequency line, the first antenna connector, the first inductor L1 to the ground, the GPIO pin is at low level, and the CPU (Central Processing Unit, central processing unit) electrically connected to the GPIO pin can obtain the The first air interface detection unit 110 is in an air interface detection state. The software parameters of the CPU calling the air interface meet the corresponding requirements.

The first antenna connector is also used to electrically connect with a radio frequency test line for conduction detection. When the radio frequency test line is electrically connected to the first antenna connector, the first radio frequency signal is connected to the instrument through the first antenna connector and the radio frequency test line. In this case, the path from the GPIO pin to the ground is disconnected by the first antenna connector, and is in a high level state, and the CPU detects that it is in a conduction detection state, and then invokes conduction software parameters to meet corresponding requirements.

The reliability of the connection between the main board and the sub board can also be detected through the level of the GPIO pin. At present, when doing reliability tests, such as slight drops, rollers, drops, etc., it will cause the board-to-board connectors and antenna connectors to fall off instantly or permanently, which will affect the performance of the whole machine. This kind of problem is generally very obscure, and it is difficult to directly find out the cause and reproduce it, especially if it falls off instantly, causing other circuits on the sub-board to lose power instantly and appear abnormal. In this embodiment, when the above-mentioned problem occurs, the level of the GPIO pin will be pulled up instantly, and the CPU will record the state, so that it is easy to determine the cause when the problem is to be investigated.

The production line BtoB and RF Cable are all fastened manually, and there will be probabilistic buckling problems. In the detection station before snapping the rear case of the whole machine, the detection process of the GPIO pin is added. If the GPIO pin is at a low level, it means that the BtoB and RFCable are successfully snapped together; if the GPIO pin is at a high level, it means that the BtoB and the test line have failed to be snapped together. In this way, repeated disassembly can be avoided, and the straight-through rate and efficiency of the production line can be improved.

Please refer to FIG. 3 . FIG. 3 is a second schematic diagram of a detection circuit 100 provided by an embodiment of the present invention. The detection circuit 100 may further include a second air interface detection unit and a sixth capacitor C6. The second air hole detection unit is arranged on the main board. The second air interface detection unit includes a second radio frequency signal input terminal, a fourth capacitor C4, a test seat, a fifth capacitor C5, a second antenna ANT2 and a third inductor L3. The second radio frequency signal input end is electrically connected to the second antenna ANT2 via the fourth capacitor C4, the test socket, and the fifth capacitor C5 in sequence. Wherein, one end of the third inductor L3 is electrically connected between the fourth capacitor C4 and the test socket, and the other end is grounded through the sixth capacitor C6.

Wherein, the test socket may be, but not limited to, a radio frequency test socket.

Wherein, one end of the sixth capacitor C6 is electrically connected between the third inductor C3 and the first board-to-board connector (B to B1), and the other end is grounded to increase the radio frequency input through the radio frequency input terminal. The isolation between signals.

In this embodiment, the voltage detection unit 140 may further include a fourth inductor L4. The GPIO pin is electrically connected between the test socket and the fifth capacitor C5 via the fourth inductor L4. The GPIO pin is electrically connected to the first board-to-board connector (B to B1 ) via the fourth inductor L4 , the test socket, and the third inductor L3 in sequence.

In a normal complete machine state, the first radio frequency signal is radiated to the second antenna ANT2 via the fourth capacitor C4, the test socket, and the fifth capacitor C5 in sequence. The GPIO pins pass through the fourth inductance L4, the test seat, the third inductance L3, the first board-to-board connector (B to B1), the flexible circuit board, and the second board-to-board connector (B to B1) in sequence. B2), the second inductance L2, the second antenna connector, the radio frequency line, the first antenna connector, the first inductance L1 are grounded, the GPIO pin is low level, and the CPU electrically connected to the GPIO pin Then it is detected that the first air interface detection unit 110 and the second air interface detection unit are in the air interface detection state.

As a result, over-the-air testing can be performed via the antenna connector and/or the test socket.

In this embodiment, when testing the conduction performance of the first radio frequency signal, that is, disconnecting the first antenna connector and inserting the radio frequency test line, the path from the GPIO pin to the ground is opened at the first connector, GPIO pin is in high state. At this time, regardless of whether there is an RF test line inserted at the test socket, the first board-to-board connector (B to B1), the second board-to-board connector (B to B2), etc., the CPU detects that it is in the conduction test state , call the conduction test in the software to meet the corresponding requirements.

When testing the conduction performance of the second radio frequency signal, that is, insert the radio frequency test line at the test socket, the path from the GPIO pin to the ground will be open at the test socket, and the GPIO pin is at a high level. At this time, regardless of the state of the first board-to-board connector (B to B1), the second board-to-board connector (B to B2), the first antenna connector, etc., the CPU detects that it is in the conduction test state, and calls the conduction test state in the software. Test to meet the corresponding needs.

In the implementation of this embodiment, the first inductance L1, the second inductance L2, the third inductance L3, and the fourth inductance L4 are all large-value inductances, which are used for blocking AC and DC. The sixth capacitor C6 is a small-value capacitor to increase the isolation between adjacent radio frequency signals and avoid mutual influence to make the detection result incorrect.

In the implementation manner in this embodiment, the number of the first air hole detection unit 110 may be one or multiple. The number of the second air interface detection unit may be one or multiple. For a specific setting manner, reference may be made to the above description of the first air interface detection unit 110 and the second air interface detection unit.

Please refer to FIG. 4 . FIG. 4 is a third schematic diagram of a detection circuit 100 provided by an embodiment of the present invention. The detection circuit 100 shown in FIG. 4 includes two first air interface detection units 110 and one second air interface detection unit. The first first air port detection unit 110 is electrically connected to the second first air port detection unit 110 through a board-to-board connector, a flexible circuit board, and an inductor, so that the voltage detection unit 140 can detect the second first air port A voltage signal between the first connection subunit 113 and the second detection subunit 112 in the detection unit 110 . Wherein, a capacitor for increasing radio frequency signal isolation is still provided between the first first air interface detection unit 110 and the second first air interface detection unit 110 .

The embodiment of the present invention also provides an electronic device, which includes a main board, a sub-board and the detection circuit 100 .

To sum up, the embodiments of the present invention provide a detection circuit and an electronic device. The circuit is applied to electronic equipment, and the electronic equipment includes a main board and a sub board. The circuit includes a voltage detection unit and a first air interface detection unit. The first air interface detection unit includes a first detection subunit, a second detection subunit and a first connection subunit. The first detection sub-unit is arranged on the main board, and the second detection sub-unit is arranged on the sub-board. The first detection subunit is electrically connected to the second detection subunit through the first connection subunit. The voltage detection unit is electrically connected between the connection subunit and the second detection subunit, and is used for a voltage signal between the first connection subunit and the second detection subunit. Thereby, the void detection for the two-board design can be realized.

Furthermore, it is also possible to judge whether the BtoB and RF Cable in the electronic device are buckled successfully through the level of the GPIO pin, and to find out the cause of some problems during the reliability test.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A detection circuit, characterized in that it is applied to electronic equipment, the electronic equipment includes a main board and a sub-board, the circuit includes a voltage detection unit and a first air interface detection unit, and the first air interface detection unit includes a first air interface detection unit a detection subunit, a second detection subunit and a first connection subunit; The first detection subunit is arranged on the main board; The second detection subunit is arranged on the sub-board; The first detection subunit is electrically connected to the second detection subunit through the first connection subunit; The voltage detection unit is electrically connected between the first connection subunit and the second detection subunit for detecting a voltage signal between the first connection subunit and the second detection subunit . 2. The circuit according to claim 1, wherein when the voltage detected by the voltage detection unit is within a first preset range, the first air interface detection unit is in an air interface detection state; the voltage detection unit The detected voltage is within a second preset range, and the first air gap detection unit is in a conduction detection state, wherein the minimum value of the second preset range is greater than the maximum value of the first preset range. 3. The circuit according to claim 1, wherein the first connection subunit comprises a first antenna connector, a second antenna connector and a radio frequency line; The first detection subunit is electrically connected to the second detection subunit via the first antenna connector, the radio frequency line, and the second antenna connector in sequence, wherein the first antenna connector is arranged on the On the main board, the second antenna connector is arranged on the sub-board. 4. The circuit according to claim 3, wherein the first detection subunit includes a first radio frequency signal input terminal, a first capacitor, and a first inductor, and the second detection subunit includes a second capacitor and a first inductor. first antenna; The first radio frequency signal input end is electrically connected to the first antenna via the first capacitor, the first antenna connector, the radio frequency line, the second antenna connector, and the second capacitor in sequence; One end of the first inductor is electrically connected between the first capacitor and the first antenna connector, and the other end is grounded. 5. The circuit according to claim 4, wherein the voltage detection unit comprises a GPIO pin, a third capacitor, a second inductor and a third connection subunit, The GPIO pin and the third capacitor are arranged on the main board; The second inductor is arranged on the sub-board; The GPIO pin is electrically connected between the second capacitor and the second antenna connector via the third connection subunit and the second inductor in turn; One end of the third capacitor is electrically connected between the GPIO pin and the third connection subunit, and the other end is grounded. 6. The circuit according to claim 5, wherein the third connection subunit comprises a first board-to-board connector, a second board-to-board connector and a flexible circuit board, The first board-to-board connector is disposed on the main board; The second board-to-board connector is disposed on the sub-board; The GPIO pin is electrically connected between the second capacitor and the second antenna connector through the first board-to-board connector, the flexible circuit board, the second board-to-board connector, and the second inductor in turn. between. 7. The circuit according to claim 6, wherein the circuit further comprises a second air interface detection unit and a sixth capacitor, the second air interface detection unit is arranged on the main board, The second air interface detection unit includes a second radio frequency signal input terminal, a fourth capacitor, a test seat, a fifth capacitor, a second antenna and a third inductor; The second radio frequency signal input end is electrically connected to the second antenna via the fourth capacitor, the test seat, and the fifth capacitor in sequence; One end of the third inductor is electrically connected between the fourth capacitor and the test socket, and the other end is grounded through the sixth capacitor. 8. The circuit according to claim 7, wherein the voltage detection unit further comprises a fourth inductor, The GPIO pin is electrically connected to the first board-to-board connector via the fourth inductor, the test socket, and the third inductor in sequence. 9 . The circuit according to claim 7 , wherein the test socket and the first antenna connector are also used to electrically connect with a radio frequency test line for conduction test. 10. An electronic device, characterized in that the electronic device comprises a main board, a sub-board, and the detection circuit according to any one of claims 1-9.