CN210629863U

CN210629863U - Portable microphone detection equipment

Info

Publication number: CN210629863U
Application number: CN201921663264.XU
Authority: CN
Inventors: 陈志立
Original assignee: Jiangxi Tianjian Electroacoustic Co ltd
Current assignee: Minami Electroacoustic Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-05-26
Anticipated expiration: 2029-09-30

Abstract

The utility model discloses a portable microphone check out test set, be in including the casing and all setting power amplifier detection circuitry and power supply converting circuit on the casing, power supply converting circuit with power amplifier detection circuitry electric connection, power amplifier detection circuitry's input can be connected with outside microphone electric property. The utility model relates to a portable microphone check out test set, convenient to carry, easy operation has and can conveniently carry and the real beneficial effect that the scene reflects microphone speech state will.

Description

Portable microphone detection equipment

Technical Field

The utility model relates to an equipment testing field, in particular to microphone check out test set.

Background

When the automobile is detected or maintained, the automobile needs to be comprehensively and accurately evaluated so as to facilitate engineers to better upgrade or maintain the equipment. At present, for the detection of the vehicle-mounted microphone, the traditional detection equipment is not easy to carry due to large size, and the requirement of outgoing carrying detection cannot be met. During detection, the traditional detection tests the condition of the analysis equipment by detecting the current and voltage of the equipment, and the detection of live voice cannot be realized.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a portable microphone check out test set, can conveniently carry, can realize the live pronunciation's of microphone detection.

According to the utility model discloses an aspect provides a portable microphone check out test set, be in including the casing and all setting power amplifier detection circuitry and power supply converting circuit on the casing, power supply converting circuit with power amplifier detection circuitry electric connection, power amplifier detection circuitry's input can be connected with outside microphone electric property.

Preferably, the housing comprises a battery cavity and a battery cover, the battery cavity is mounted in the housing, a through hole matched with the battery cavity is formed in the surface of the housing, and the battery cover is detachably mounted on the through hole.

Preferably, the power supply conversion circuit includes a battery detachably mounted in the battery cavity.

Preferably, the power supply conversion circuit comprises a power supply unit and a filtering unit, and a power end of the power amplifier detection circuit is electrically connected with the power supply unit; one end of the filter unit is electrically connected with the power end of the power amplifier detection circuit, and the other end of the filter unit is grounded.

Preferably, the power supply unit comprises a power adapter and a power adapter; the power adapter is electrically connected with the power adapter, and the power adapter is electrically connected with an external power supply.

Preferably, the power amplifier detection circuit includes a signal pickup unit, a power amplifier component and a power amplifier processing unit respectively connected with the signal pickup unit and the power amplifier component electrically, and the signal pickup unit can be electrically connected with an external microphone.

Preferably, the signal pickup unit includes a microphone interface, a resistor R3, a resistor R4, a capacitor C8, and a capacitor C13; one end of the microphone interface is grounded, the other end of the microphone is electrically connected with one end of the resistor R3 and one end of the capacitor C13, the other end of the resistor R3 is electrically connected with a power supply, the other end of the capacitor C13 is electrically connected with one end of the resistor R4, and the other end of the resistor R4 is electrically connected with one input end of the power amplifier processing unit; one end of the capacitor C8 is electrically connected with a power supply, and the other end of the capacitor C8 is grounded.

Preferably, the housing is provided with a power switch; one end of the power switch is electrically connected with the power supply conversion circuit, and the other end of the power switch is electrically connected with the power amplifier detection circuit.

Any one of the technical schemes at least has the following beneficial effects:

the utility model relates to a portable microphone check out test set, convenient to carry, easy operation has and can conveniently carry and the real beneficial effect that the scene reflects microphone speech state will.

Drawings

The present invention will be further described with reference to the accompanying drawings and examples;

fig. 1 is an isometric view of an embodiment of the microphone detection apparatus of the present invention;

fig. 2 is a general schematic diagram of an embodiment of the microphone detection device of the present invention;

fig. 3 is an internal circuit diagram of an embodiment of the microphone detection device of the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, one embodiment of the present embodiment is shown. The housing 10 is outermost in the present embodiment, and the appearance thereof is in a rectangular parallelepiped shape, and may be a cylindrical shape in some embodiments, but is not limited thereto. The housing 10 is further provided with a battery cavity and a battery cover 11, the battery cavity is installed in the housing 10, the surface of the housing 10 is provided with an opening matched with the battery cavity, and the battery cover 11 is detachably installed on the opening. The battery cover 11 is opened, the battery can be installed in the battery cavity, and the battery cover 11 is installed after the battery is installed. If the tester finishes the test process and the battery power consumption of the test equipment of the embodiment is finished, the tester can disassemble the battery cover 11 to replace the battery without power, and continue the previous test operation, thereby ensuring the sustainable performance of the test operation.

Of course, in practical applications, a rechargeable battery may be adopted, the rechargeable battery is fixedly installed inside the housing 10, and the surface of the housing 10 is provided with an opening for charging. This maintains the integrity and aesthetics of the appearance of the device.

In some other embodiments, the power conversion circuit 30 is composed of a power unit 31 and a filtering unit 32, and the power end of the power amplifier detection circuit 20 is electrically connected to the power unit 31; one end of the filter unit 32 is electrically connected to the power supply end of the power amplifier detection circuit 20, and the other end of the filter unit 32 is grounded. In the present embodiment, the capacitor C5 is used to charge the filter unit 32, but other types of filter circuits may be used, and the present invention is not limited thereto.

Furthermore, the power supply unit 31 is composed of a power adapter and a power adapter; the power adapter is electrically connected with the power adapter, and the power adapter is electrically connected with the external power supply. The external power supply directly supplies power for the test equipment, so that the problem that the internal power supply is not electrified is not needed to be worried about, and only the external power supply needs to supply electric energy. Therefore, the space of a power supply can be saved in the test equipment, and the test equipment is smaller and more portable.

Referring to fig. 2 and 3, in this embodiment, a power amplifier detection circuit 20 and a power supply conversion circuit 30 are disposed inside the casing 10, the power supply conversion circuit 30 is electrically connected to the power amplifier detection circuit 20, and an input end of the power amplifier detection circuit 20 can be electrically connected to an external microphone. This embodiment utilizes a power amplifier circuit to detect the specific conditions of the microphone. When detecting the vehicle-mounted microphone, the vehicle is often driven to a detection center for detection in the past, and equipment for detecting the microphone is relatively large and heavy. Compare prior art, this embodiment only has the palm size, and very light makes things convenient for tester's carrying and measurement.

In the present embodiment, a power switch is provided on the housing 10; one end of the power switch is electrically connected to the power conversion circuit 30, and the other end of the power switch is electrically connected to the power amplifier detection circuit 20. The power switch in this embodiment is a toggle switch, and may be a ship-shaped switch, but is not limited thereto. In the process of testing the microphone, if a non-hardware fault occurs, the equipment can be restarted through the power switch, so that the aim of resetting the equipment to remove the fault is fulfilled. After the test is finished, the power supply is turned off through the power switch, so that the test equipment can be protected, and electric energy can be saved.

In this embodiment, the power amplifier detection circuit 20 includes a signal pickup unit 21, a power amplifier component 23, and a power amplifier processing unit 22 electrically connected to the signal pickup unit 21 and the power amplifier component 23, respectively, where the signal pickup unit 21 can be electrically connected to an external microphone. The power amplifier processing unit 22 in this embodiment is a power amplifier chip, which integrates the functions of signal processing and signal amplification, one input end of the power amplifier chip is electrically connected to the signal pickup unit 21, the other input end of the power amplifier chip is electrically connected to one end of a capacitor C7, and the other end of the capacitor C7 is grounded; one output end of the power amplification chip is electrically connected with the power amplification processing unit 22; the power amplification chip controls the output signal according to the input signal. The integrated power amplification chip can reduce the occupation of the circuit to the internal space, and can reduce the power consumption, so that the space utilization rate of the test equipment is higher, and the test equipment is lighter and easier to carry. Of course, the signal processing circuit and the signal amplifying circuit may not be integrated together in some embodiments, and are not limited thereto.

Furthermore, the signal pickup unit 21 includes a microphone interface 211, a resistor R3, a resistor R4, a capacitor C8, and a capacitor C13; one end of the microphone interface 211 is grounded, the other end of the microphone is electrically connected with one end of the resistor R3 and one end of the capacitor C13, the other end of the resistor R3 is electrically connected with the power supply, the other end of the capacitor C13 is electrically connected with one end of the resistor R4, and the other end of the resistor R4 is electrically connected with one input end of the power amplification chip; one end of the capacitor C8 is electrically connected to the power supply, and the other end of the capacitor C8 is grounded.

In this embodiment, an output terminal of the power amplifier chip is electrically connected to one end of the inductor L1, the other end of the inductor L1 is electrically connected to one end of the capacitor C10 and one end of the resistor R6, the other end of the capacitor C10 is grounded, and the other end of the resistor R6 is connected to one end of the speaker. The other end of the loudspeaker is connected with the other output end of the power amplifier through a circuit with the same structure. These circuits constitute the power amplifier section 23 of the present embodiment. The sound signal output by the loudspeaker can be used for analyzing the specific condition of the microphone in real time.

Through the above circuit, the vehicle-mounted microphone is connected to the microphone interface 211 of the present embodiment, and the test device is started to start the test operation. The functional condition of the vehicle-mounted microphone is detected by listening to the sound signal output by the loudspeaker, and the high-efficiency audio power amplifier chip can effectively transmit the signal of the vehicle-mounted microphone to the loudspeaker at the output end in real time and convert the signal into the sound signal which can be picked up. Some minor noise or noise can also be detected at the first time, and the high-efficiency audio power amplifier chip enables the embodiment to have higher sensitivity. In addition, compared with the conventional large-scale test equipment, the power consumption of the embodiment is low, and the long-time running of the test operation can be ensured and the cruising ability of the test equipment can be improved. The existing test equipment reflects the specific situation of the microphone by using the current-voltage characteristic of the microphone, while the embodiment directly judges the specific situation of the microphone by listening to a sound signal, and the embodiment can more intuitively and clearly reflect the specific situation of the microphone.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge range of those skilled in the art.

Claims

1. The utility model provides a portable microphone check out test set, its characterized in that includes casing (10) and all sets up power amplifier detection circuitry (20) and power supply converting circuit (30) on casing (10), power supply converting circuit (30) with power amplifier detection circuitry (20) electric connection, the input of power amplifier detection circuitry (20) can be with outside microphone electric connection.

2. A portable microphone detection apparatus according to claim 1, wherein the housing (10) comprises a battery cavity and a battery cover (11), the battery cavity is installed in the housing (10), a through hole matched with the battery cavity is arranged on the surface of the housing (10), and the battery cover (11) is detachably installed on the through hole.

3. A portable microphone detection apparatus according to claim 2, characterized in that the power conversion circuit (30) comprises a battery, which is detachably mounted in the battery cavity.

4. The portable microphone detection device according to claim 1, wherein the power conversion circuit (30) comprises a power supply unit (31) and a filter unit (32), and a power end of the power amplifier detection circuit (20) is electrically connected to the power supply unit (31); one end of the filter unit (32) is electrically connected with a power supply end of the power amplifier detection circuit (20), and the other end of the filter unit (32) is grounded.

5. A portable microphone detection apparatus according to claim 4, characterized in that the power supply unit (31) comprises a power adapter and a power adapter; the power adapter is electrically connected with the power adapter, and the power adapter is electrically connected with an external power supply.

6. The portable microphone detection device according to claim 1, wherein the power amplifier detection circuit (20) comprises a signal pickup unit (21), a power amplifier component (23), and a power amplifier processing unit (22) electrically connected to the signal pickup unit (21) and the power amplifier component (23), respectively, and the signal pickup unit (21) is electrically connectable to an external microphone.

7. A portable microphone test device according to claim 6, characterized in that the signal pick-up unit (21) comprises a microphone interface (211), a resistor R3, a resistor R4, a capacitor C8 and a capacitor C13; one end of the microphone interface (211) is grounded, the other end of the microphone is electrically connected with one end of the resistor R3 and one end of the capacitor C13, the other end of the resistor R3 is electrically connected with a power supply, the other end of the capacitor C13 is electrically connected with one end of the resistor R4, and the other end of the resistor R4 is electrically connected with one input end of the power amplifier processing unit (22); one end of the capacitor C8 is electrically connected with a power supply, and the other end of the capacitor C8 is grounded.

8. A portable microphone detection apparatus according to claim 1, characterized in that the housing (10) is provided with a power switch; one end of the power switch is electrically connected with the power supply conversion circuit (30), and the other end of the power switch is electrically connected with the power amplifier detection circuit (20).