CN107371117A - A horn detection device and method - Google Patents

Abstract

The embodiment of the invention relates to the technical field of loudspeaker detection, in particular to a loudspeaker detection device and method, which comprises the following steps: the system comprises at least four horn interfaces, a detection module and a main control module; the detection module is electrically connected with the horn interface and is used for collecting impedance voltage of each channel; the main control module is electrically connected with the detection module and used for judging whether the impedance voltage of any channel is greater than a first preset voltage or not, and if yes, the two horn interfaces on the channel are determined to be qualified. It can be seen that to two loudspeaker or many loudspeaker, no longer need through the manual short circuit of measuring between two loudspeaker interfaces of universal meter, but gather impedance voltage to when judging impedance voltage on this passageway through host system is greater than first predetermined voltage, can confirm that two loudspeaker interfaces on this passageway are qualified, consequently, to two loudspeaker or many loudspeaker, can be quick detect loudspeaker, thereby can promote the detection efficiency of two loudspeaker interfaces or many loudspeaker interfaces.

Description

A horn detection device and method

technical field

Embodiments of the present invention relate to the technical field of horn detection, in particular to a horn detection device and method thereof.

Background technique

The speaker factory needs to test whether there is a short circuit between the positive and negative poles of the speaker before the speaker is shipped. At present, for a single speaker, a frequency scanner can be used to test the short circuit of a single speaker. Since the frequency scanner is a single-channel output, so , The frequency scanner can only test the short circuit of a single speaker. As for whether there is a short circuit between the positive and negative poles of double speakers or multiple speakers, use a multimeter to measure manually. Put it on a stripped head of the terminal, and put the other needle on the stripped head of the other three wires in turn. If the multimeter shows that it is not conductive, it means it is qualified, and repeat this to measure the other three wires. A total of 6 tests are required. , although the short-circuit faults in all cases can be tested, but the number of manual tests is too many, which affects the detection efficiency.

Contents of the invention

Embodiments of the present invention provide a speaker detection device and method for improving the detection efficiency of a dual-speaker interface or a multi-speaker interface.

An embodiment of the present invention provides a speaker detection device, including: at least four speaker interfaces, a detection module, and a main control module;

The detection module is electrically connected to the speaker interface, and is used to collect the impedance voltage of each channel, and the channel is formed by a closed circuit of any two speaker interfaces;

The main control module is electrically connected to the detection module, and is used to judge whether the impedance voltage of any channel is greater than the first preset voltage, and if so, determine that the two speaker interfaces on the channel are qualified.

Preferably, the detection module includes: a digital logic control unit, a switch unit located on each channel, and an impedance voltage acquisition unit;

The digital logic control unit is electrically connected to the main control module and the switch unit respectively, and is used to receive instruction information from the main control module, and control the working state of the switch unit according to the instruction information;

The impedance voltage acquisition unit on each channel is configured to calculate the channel impedance voltage when the corresponding channel forms a path.

Preferably, the impedance voltage acquisition unit includes: a voltage dividing resistor and an impedance voltage acquisition port;

One end of the voltage dividing resistor is connected to one end of the impedance voltage acquisition port, and the other end of the voltage dividing resistor is connected to a public power supply;

One end of the impedance voltage acquisition port is also connected to a speaker interface through a switch unit, and the other end of the channel is respectively connected to ground and another speaker interface;

Each channel shares an impedance voltage acquisition unit.

Preferably, it also includes: an alarm module and an LCD display;

The LCD display screen is electrically connected to the main control module, and is used to display the impedance value corresponding to each channel, and the impedance value is calculated by the main control module according to the impedance voltage of each channel;

The alarm module is electrically connected to the main control module, and is used to receive the first indication information sent by the main control module, and send an alarm prompt information according to the first indication information, and the first indication information is the Generated when the main control module determines that the two speaker interfaces on any channel are unqualified.

Preferably, it also includes: a power module;

The power supply module is used to supply power to the power load side, and the power load side includes at least one of the detection module, the main control module, the alarm module and the LCD display screen.

Preferably, the power module includes: a control chip, an overcurrent protection detection unit, a power chip and a power interface;

The power interface is used to connect with the power supply;

The overcurrent protection detection unit is connected between the power chip and the power interface, and is used to detect the power supply voltage output by the power supply to the power chip;

One end of the power chip is connected to the overcurrent protection detection unit, and the other end is connected to the power load;

The control chip is connected to the overcurrent protection detection unit, and is used to disconnect the power supply and the power supply chip through the overcurrent protection detection unit when the power supply voltage exceeds a second preset voltage. connect.

Preferably, the overcurrent protection detection unit includes: a charging switch, a first resistor, a current monitoring unit, and a second resistor;

The charging switch is located between the power interface and the first resistor;

The first resistor is located between the power chip and the charging switch;

The current monitoring unit is connected to both ends of the first resistor, and is used to sense a sensing voltage at both ends of the first resistor, and output a supply current to the second resistor according to the sensing voltage;

The second resistor is located between the output terminal of the current monitoring unit and the ground terminal;

The node between the second resistor and the output terminal of the current monitoring unit is electrically connected to the control chip, the control chip determines the voltage of the second resistor according to the supply current, and determines the voltage of the second resistor according to the second resistor The voltage controls the opening and closing of the charging switch.

Preferably, the charging switch includes a first charging switch and a second charging switch; the power module also includes a battery unit;

The control chip is connected to the battery unit through the first charging switch, and is used to supply power to the power chip through the battery unit;

The control chip is also electrically connected to the power supply through the second charging switch, for supplying power to the power chip through the power supply.

Preferably, the overcurrent protection detection unit further includes: a filtering unit;

The filtering unit is connected in parallel with the second resistor, and is used for filtering the supply current.

The embodiment of the present invention also provides a method for detecting a speaker through the speaker detection device provided in the above embodiment, including:

Collect the impedance voltage of each channel;

It is judged whether the impedance voltage of any channel is greater than the first preset voltage, and if so, it is determined that the two speaker interfaces on the channel are qualified.

The speaker detection device and method provided by the above embodiments include: at least four speaker interfaces, a detection module, and a main control module; the detection module is electrically connected to the speaker interface, and is used to collect the impedance voltage of each channel. Formed by a closed circuit of any two speaker interfaces; the main control module is electrically connected to the detection module, and is used to determine whether the impedance voltage of any channel is greater than the first preset voltage, and if so, determine whether the impedance voltage of any channel is greater than the first preset voltage. The speaker interface is qualified. It can be seen that for double speakers or multiple speakers, it is no longer necessary to manually measure whether there is a short circuit between the two speaker interfaces through a multimeter. Impedance voltage of the formed channel, and when the main control module judges that the impedance voltage on the channel is greater than the first preset voltage, it can be determined that the two speaker interfaces on the channel are qualified. Therefore, for double speakers or multiple speakers, it can Quickly detect the speakers, so as to improve the detection efficiency of the dual-speaker interface or multi-speaker interface.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings that need to be used in the description of the embodiments.

FIG. 1 is a schematic structural diagram of a horn detection device provided by an embodiment of the present invention;

Fig. 2 is a structural schematic diagram of a horn detection device provided by another embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a detection module provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a switch unit provided by an embodiment of the present invention;

5 is a schematic structural view of a horn detection device provided by another embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a power module provided by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an overcurrent protection detection unit provided by an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a power module provided by another embodiment of the present invention;

FIG. 9 is a schematic structural diagram of an overcurrent protection detection unit provided by another embodiment of the present invention;

Fig. 10 is a schematic flowchart of a method for detecting a horn provided by an embodiment of the present invention.

detailed description

In order to make the object, technical solution and beneficial effects of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

FIG. 1 exemplarily shows a structural diagram of a speaker detection device provided by an embodiment of the present invention. As shown in FIG. 1 , the speaker detection device 10 may include at least four speaker interfaces 1 , a detection module 2 and a main control module 3 .

The detection module 2 is electrically connected with the speaker interface 1, and is used for collecting the impedance voltage of each channel, and the channel is formed by a closed circuit of any two speaker interfaces.

For example, the closed circuit between the speaker interface L- and L+ can form a channel; the closed circuit between L- and R- can form a channel; the closed circuit between L- and R+ can form a channel; L+ and R A closed circuit between - can form a channel; a closed circuit between L+ and R+ can form a channel; and a closed circuit between R- and R+ can form a channel.

The main control module 3 is electrically connected to the detection module 2, and is used to judge whether the impedance voltage of any channel is greater than the first preset voltage, and if so, determine that the two speaker interfaces on the channel are qualified; otherwise, determine that the two speaker interfaces on the channel are qualified. A speaker interface is unqualified.

Among them, the first preset voltage can be based on the corresponding voltage value when the two speaker interfaces on any channel are unqualified; the first preset voltage can also be based on the corresponding voltage value when the two speaker interfaces on multiple channels are unqualified The mean value of the impedance voltage.

On the basis of the speaker detection device 10 provided in FIG. 1 , in order to facilitate viewing and to judge the impedance value between the two speaker interfaces on any channel in time, it may also include: LCD display screen 4 and alarm module 5, see figure 2.

FIG. 2 is a schematic structural diagram of a horn detection device 20 provided by another embodiment of the present invention.

For the sake of simplicity of description, the same parts in FIG. 2 as in FIG. 1 will not be described again. It can be seen from FIG. 2 that the LCD display 4 is electrically connected to the main control module 3 for displaying the impedance value corresponding to each channel, so The above impedance value is calculated by the main control module 3 according to the impedance voltage of each channel.

The alarm module 5 is electrically connected to the main control module 3, and is used to receive the first indication information sent by the main control module 3, and send an alarm prompt message according to the first indication information, and the first indication information is that the main control module 3 confirms any Generated when two speaker connectors on a channel fail.

On the basis of the speaker detection device provided in Fig. 1 or Fig. 2, in order to quickly collect the impedance voltage of each channel, the detection module 2 may include: a digital logic control unit 21, a switch unit 22 positioned on each channel and an impedance voltage acquisition Unit 23, see FIG. 3 .

The digital logic control unit 23 is electrically connected with the main control module 3 and the switch unit 22 respectively, and is used for receiving control information from the main control module 3 and controlling the working state of the switch unit 22 according to the control information. The impedance voltage acquisition unit 23 on each channel is used to calculate the impedance voltage of the channel when the corresponding channel forms a path; and each channel shares one impedance voltage acquisition unit 23 .

After the impedance voltage acquisition unit 23 calculates the impedance voltage of the channel when the corresponding channel forms a path, it is also used to send the impedance voltage of the channel to the main control module 3, and the main control module 3 compares the impedance voltage of the channel with the first preset If the impedance voltage of the channel is greater than the first preset voltage, it is determined that the two speaker interfaces on the channel are qualified; otherwise, it is determined that the two speaker interfaces on the channel are unqualified.

In a specific implementation, the switch unit 22 may include several switches, the main control module 3 sends control information to the digital logic control unit 21, and then the digital logic control unit 21 can control the closing and opening of the switch unit 22 according to the control information, thereby Make the closed circuit of any two speaker interfaces form a channel.

Referring to FIG. 4 , the switch unit 22 may include 8 switches, namely: S1 , S2 , S3 , S4 , S5 , S6 , S7 , and S8 . The impedance voltage acquisition unit 23 may include a voltage dividing resistor R1 and an impedance voltage acquisition port 230 . Wherein, the impedance voltage acquisition port 230 may include a port 1 and a port 2 .

It can be seen from FIG. 4 that one end of the voltage dividing resistor R1 is connected to port 1 of the impedance voltage collection port 230 , and the other end of the voltage dividing resistor R1 is connected to the common power supply Vin. Port 1 in the impedance voltage acquisition port 230 can be connected to the speaker interface through a switch unit, and port 2 in the impedance voltage acquisition port 230 can be connected to another speaker interface through a switch unit. Therefore, any two speaker interfaces can be connected through a switch unit and Port 1 and port 2 of the impedance voltage collection ports 230 form a channel.

Specifically, if the closed circuit between the speaker interfaces L- and L+ is to form a channel, the control message 1 can be sent to the digital logic control unit 21 through the main control module 3, and the content of the control message 1 is: close S1, S2, open S3, S4, S5, S6, S7, S8, after receiving the control message 1, the digital logic control unit 21 closes S1, S2, and opens S3, S4, S5, S6, S7, S8, this At this time, the closed circuit between the speaker interface L- and L+ can form a channel. After the closed circuit between the speaker interface L- and L+ forms a channel, the main control module 3 can according to the known values of Vin and R1, The voltage value V1 at the port 1 is obtained through calculation, that is, the main control module 3 can obtain the impedance voltage V1 between the speaker interfaces L- and L+ through calculation. After obtaining the impedance voltage V1 between the speaker interfaces L- and L+, the main control module 3 compares V1 with the first preset voltage V0, and if V1 is greater than V0, it determines that the speaker interfaces L- and L+ are qualified speaker interfaces , otherwise, it is determined that the speaker interfaces L- and L+ are unqualified speaker interfaces. Among them, the first preset voltage V0 can be based on the corresponding impedance voltage when the two speaker interfaces on any channel are unqualified; the first preset voltage V0 can also be based on when the two speaker interfaces on multiple channels are unqualified Corresponding impedance voltage mean.

It should be noted that due to the voltage dividing resistor R1, when V1>V0, V1 must be smaller than the common power supply Vin, that is, when V0<V1<Vin, it can be determined that L- and L+ are unqualified speaker interfaces.

Optionally, after the main control module 3 determines that the speaker interface L- and L+ are unqualified speaker interfaces, it can also generate an indication message, and send the indication information to the alarm module 5, so that the alarm module 5 can respond according to the indication. The message sends out an alarm prompt message.

Optionally, after the main control module 3 can calculate the impedance voltage V1 between the speaker interface L- and L+, the main control module 3 can also calculate the resistance between the speaker interface L- and L+ according to Vin, R1, V1 The value R ₀₁ , that is, the main control module 3 can calculate the impedance value R ₀₁ between the speaker interfaces L- and L+ according to Vin, R1, and V1. Moreover, the main control module 3 can also send the calculated impedance value _R01 between the speaker interfaces L- and L+ to the LCD display 4 for display, so that the inspector can check the specific impedance value between the speaker interfaces L- and L+.

Similarly, if the closed circuit between the speaker interface L- and R+ is to form a channel, the control message 2 can be sent to the digital logic control unit 21 through the main control module 3, and the content of the control message 2 is: close S1, S3, S5, open S2, S4, S6, S7, S8, after the digital logic control unit 21 receives the control message 2, close S1, S3, S5, and open S2, S4, S6, S7, S8, this At this time, the closed circuit between the speaker interface L- and R+ can form a channel. After the closed circuit between the speaker interface L- and R+ forms a channel, the main control module 3 can according to the known values of Vin and R1, The voltage value V2 at the port 1 is obtained through calculation, that is, the main control module 3 can obtain the impedance voltage V2 between the speaker interfaces L- and L+ through calculation. After the main control module 3 obtains the impedance voltage V2 between the speaker interfaces L- and L+, it compares V2 with the first preset voltage V0, and if V2 is greater than V0, it determines that the speaker interfaces L- and R+ are qualified speaker interfaces , otherwise, it is determined that the speaker interface L- and R+ are unqualified speaker interfaces. Among them, the first preset voltage V0 can be based on the corresponding impedance voltage when the two speaker interfaces on any channel are unqualified; the first preset voltage V0 can also be based on when the two speaker interfaces on multiple channels are unqualified Corresponding impedance voltage mean.

It should be noted that due to the voltage dividing resistor R1, when V2>V0, V2 must be smaller than the public power supply Vin, that is, when V0<V2<Vin, it can be determined that L- and R+ are unqualified speaker interfaces.

Optionally, after the main control module 3 determines that the horn interface L- and R+ are unqualified horn interfaces, it can also generate an indication message, and send the indication information to the alarm module 5, so that the alarm module 5 can respond according to the indication. The message sends out an alarm prompt message.

Optionally, after the main control module 3 can calculate the impedance voltage V2 between the speaker interface L- and R+, the main control module 3 can also calculate the resistance between the speaker interface L- and R+ according to Vin, R1, and V2 The value R ₀₂ , that is, the main control module 3 can calculate the impedance value R ₀₂ between the speaker interface L- and R+ according to Vin, R1, and V2. Moreover, the main control module 3 can also send the calculated impedance value _R02 between the speaker interface L- and R+ to the LCD display 4 for display, so that the inspector can check the specific impedance value between the speaker interface L- and R+.

Similarly, if the closed circuit between the speaker interfaces L- and R- is to form a channel, the control message 3 can be sent to the digital logic control unit 21 through the main control module 3, and the content of the control message 3 is: close S1 , S4, S8, open S2, S3, S5, S6, S7, after receiving the control message 3, the digital logic control unit 21 closes S1, S4, S8, and opens S2, S3, S5, S6, S7, At this time, the closed circuit between the speaker interfaces L- and R- can form a channel. After the closed circuit between the speaker interfaces L- and R- forms a channel, the main control module 3 can value, the voltage value V3 at the port 1 is calculated, that is, the main control module 3 can obtain the impedance voltage V3 between the speaker interfaces L- and R- through calculation. After the main control module 3 obtains the impedance voltage V3 between the speaker interfaces L- and R-, it can compare V3 with the first preset voltage V0. If V3 is greater than V0, it is determined that the speaker interfaces L- and R- are qualified. speaker interface, otherwise, determine that the speaker interface L- and R- are unqualified speaker interfaces. Among them, the first preset voltage V0 can be based on the corresponding impedance voltage when the two speaker interfaces on any channel are unqualified; the first preset voltage V0 can also be based on when the two speaker interfaces on multiple channels are unqualified Corresponding impedance voltage mean.

It should be noted that due to the voltage dividing resistor R1, when V3>V0, V3 must be smaller than the public power supply Vin, that is, when V0<V3<Vin, it can be determined that L- and R- are unqualified speaker interfaces.

Optionally, after the main control module 3 determines that the speaker interfaces L- and R- are unqualified speaker interfaces, it can also generate an indication message, and send the indication information to the alarm module 5, so that the alarm module 5 The instruction message sends out an alarm prompt message.

Optionally, after the main control module 3 can calculate the impedance voltage V3 between the speaker interface L- and R-, the main control module 3 can also calculate the voltage between the speaker interface L- and R- according to Vin, R1, and V3. The resistance value R ₀₃ , that is, the main control module 3 can calculate the resistance value R ₀₃ between the speaker interface L- and R- according to Vin, R1, and V3. And the main control module 3 can also send the calculated impedance value _R03 between the speaker interface L- and R- to the LCD display 4 for display, so that the inspector can check the specific impedance between the speaker interface L- and R- value.

Similarly, if the closed circuit between the speaker interfaces L+ and R+ is to form a channel, the control message 4 can be sent to the digital logic control unit 21 through the main control module 3, and the content of the control message 4 is: close S2, S3 , S7, open S1, S4, S5, S6, S8, after receiving the control message 4, the digital logic control unit 21 closes S2, S3, S7, and opens S1, S4, S5, S6, S8, at this time , the closed circuit between the speaker interface L+ and R+ can form a channel, after the closed circuit between the speaker interface L+ and R+ forms a channel, the main control module 3 can calculate the port according to the known values of Vin and R1 The voltage value V4 at 1, that is, the main control module 3 can obtain the impedance voltage V4 between the speaker interfaces L+ and R+ through calculation. After the main control module 3 obtains the impedance voltage V4 between the speaker interfaces L+ and R+, it can compare V4 with the first preset voltage V0, and if V4 is greater than V0, then determine that the speaker interfaces L+ and R+ are qualified speaker interfaces, Otherwise, it is determined that the speaker ports L+ and R+ are unqualified speaker ports. Among them, the first preset voltage V0 can be based on the corresponding impedance voltage when the two speaker interfaces on any channel are unqualified; the first preset voltage V0 can also be based on when the two speaker interfaces on multiple channels are unqualified Corresponding impedance voltage mean.

It should be noted that due to the voltage dividing resistor R1, when V4>V0, V4 must be smaller than the public power supply Vin, that is, when V0<V4<Vin, it can be determined that L+ and R+ are unqualified speaker interfaces. Optionally, after the main control module 3 determines that the speaker interfaces L+ and R+ are unqualified speaker interfaces, it can also generate an indication message, and send the indication information to the alarm module 5, so that the alarm module 5 can respond according to the indication information. Send out an alarm message.

Optionally, after the main control module 3 can calculate the impedance voltage V4 between the speaker interface L+ and R+, the main control module 3 can also calculate the resistance between the speaker interface L- and R- according to Vin, R1, and V4 The value R ₀₄ , that is, the main control module 3 can calculate the impedance value R ₀₄ between the speaker interface L+ and R+ according to Vin, R1, and V4. Moreover, the main control module 3 can also send the calculated impedance value _R04 between the speaker interfaces L+ and R+ to the LCD display 4 for display, so that inspectors can check the specific impedance value between the speaker interfaces L+ and R+.

Similarly, if the closed circuit between the speaker interfaces L+ and R- is to form a channel, the control message 5 can be sent to the digital logic control unit 21 through the main control module 3, and the content of the control message 5 is: close S2, S4, S6, open S1, S3, S5, S7, S8, after the digital logic control unit 21 receives the control message 5, close S2, S4, S6, and open S1, S3, S5, S7, S8, this At this time, the closed circuit between the speaker interface L+ and R- can form a channel. After the closed circuit between the speaker interface L+ and R- forms a channel, the main control module 3 can according to the known values of Vin and R1, The voltage value V5 at the port 1 is obtained through calculation, that is, the main control module 3 can obtain the impedance voltage V5 between the speaker interfaces L+ and R− through calculation. After the main control module 3 obtains the impedance voltage V5 between the speaker interfaces L+ and R-, it can compare V5 with the first preset voltage V0. If V5 is greater than V0, it is determined that the speaker interfaces L+ and R- are qualified speakers. interface, otherwise, determine that the speaker interface L+ and R- are unqualified speaker interfaces. Among them, the first preset voltage V0 can be based on the corresponding impedance voltage when the two speaker interfaces on any channel are unqualified; the first preset voltage V0 can also be based on when the two speaker interfaces on multiple channels are unqualified Corresponding impedance voltage mean.

It should be noted that due to the voltage dividing resistor R1, when V5>V0, V5 must be smaller than the public power supply Vin, that is, when V0<V5<Vin, it can be determined that L+ and R- are unqualified speaker interfaces.

Optionally, after the main control module 3 determines that the speaker interfaces L+ and R+ are unqualified speaker interfaces, it can also generate an indication message, and send the indication information to the alarm module 5, so that the alarm module 5 can respond according to the indication information. Send out an alarm message.

Optionally, after the main control module 3 can obtain the impedance voltage V5 between the speaker interface L+ and R- through calculation, the main control module 3 can also calculate the resistance between the speaker interface L+ and R- according to Vin, R1, and V5 The value R ₀₅ means that the main control module 3 can calculate the impedance value R ₀₅ between the speaker interface L+ and R- according to Vin, R1 and V5. Moreover, the main control module 3 can also send the calculated impedance value _R05 between the speaker interfaces L+ and R- to the LCD display 4 for display, so that inspectors can check the specific impedance value between the speaker interfaces L+ and R-.

Similarly, if the closed circuit between the speaker interfaces R+ and R- is to form a channel, the control message 6 can be sent to the digital logic control unit 21 through the main control module 3, and the content of the control message 6 is: close S3, S4, S7, S8, open S1, S2, S5, S6, after the digital logic control unit 21 receives the control message 6, close S3, S4, S7, S8, and open S1, S2, S5, S6, this At this time, the closed circuit between the speaker interface R+ and R- can form a channel. After the closed circuit between the speaker interface R+ and R- forms a channel, the main control module 3 can according to the known values of Vin and R1, The voltage value V6 at the port 1 is obtained through calculation, that is, the main control module 3 can obtain the impedance voltage V6 between the speaker interfaces R+ and R− through calculation. After the main control module 3 obtains the impedance voltage V6 between the speaker interfaces R+ and R-, it can compare V6 with the first preset voltage V0. If V6 is greater than V0, it is determined that the speaker interfaces R+ and R- are qualified speakers. If not, confirm that the speaker interfaces R+ and R- are unqualified speaker interfaces. Among them, the first preset voltage V0 can be based on the corresponding impedance voltage when the two speaker interfaces on any channel are unqualified; the first preset voltage V0 can also be based on when the two speaker interfaces on multiple channels are unqualified Corresponding impedance voltage mean.

It should be noted that due to the voltage dividing resistor R1, when V6>V0, V6 must be smaller than the public power supply Vin, that is, when V0<V6<Vin, it can be determined that R+ and R- are unqualified speaker interfaces.

Optionally, after the main control module 3 determines that the horn interface R+ and R- are unqualified horn interfaces, it can also generate an indication message, and send the indication information to the alarm module 5, so that the alarm module 5 can respond according to the indication. The message sends out an alarm prompt message.

Optionally, after the main control module 3 can obtain the impedance voltage V5 between the speaker interface R+ and R- through calculation, the main control module 3 can also calculate the resistance between the speaker interface R+ and R- according to Vin, R1, and V5 The value R ₀₆ , that is, the main control module 3 can calculate the impedance value R ₀₆ between the speaker interface R+ and R- according to Vin, R1, and V6. Moreover, the main control module 3 can also send the calculated impedance value _R06 between the speaker interfaces R+ and R- to the LCD display 4 for display, so that inspectors can check the specific impedance value between the speaker interfaces R+ and R-.

It can be seen that by sending different control information to the digital logic control unit through the main control module, the different pins of the dual speakers can be turned on and off, so as to realize the two-by-two detection of the dual speakers without the need to build different The circuit detection can reduce the complexity of the circuit, thereby reducing the production cost.

In addition, in order to prevent static electricity between the lines inside the switch unit, resulting in damage to the transmission of the main control module, a TVS (Transient Voltage Suppressor, Zener diode) voltage regulator tube can be connected between the speaker interface and the switch to avoid the line inside the switch unit. Static electricity occurs between them. For example, TVS regulator tubes can be connected between L- and switch S1, between L+ and switch S2, between R- and switch S3, between R+ and switch S4, to avoid static electricity between the lines inside the switch unit , resulting in damage to the transmission of the main control module. On the basis of the horn detection device 20 provided in FIG. 2 , it may further include: a power supply module 6 , see FIG. 5 .

FIG. 5 is a schematic structural diagram of a horn detection device 30 provided by another embodiment of the present invention.

For the sake of simplicity of description, the same parts in FIG. 5 as in FIG. 2 are not described again. It can be seen from FIG. At least one of the main control module 3 , the LCD display 4 and the alarm module 5 .

In order to protect the power module, the power module 6 may include: a power interface 61 , a control chip 62 , an overcurrent protection detection unit 63 and a power chip 64 , see FIG. 6 .

Wherein, the power interface 61 is used to connect with the power supply; the overcurrent protection detection unit 63 is connected between the power interface 61 and the power chip 64, and is used to detect the power supply voltage output from the power supply to the power chip 64; one end of the power chip 64 It is connected to the overcurrent protection detection unit 63, and the other end is connected to the power load side. For example, the other end of the power chip 64 can be connected to the common power supply Vin in the impedance voltage acquisition unit, so as to provide the common power supply to the impedance voltage acquisition unit. In addition, the other end of the power chip 64 can also be connected to the detection module 2 , the main control module 3 , the LCD display 4 and the alarm module 5 .

The control chip 62 is connected to the power interface 61 and the overcurrent protection detection unit 63 respectively, and is used to disconnect the power supply from the power supply chip 64 through the overcurrent protection detection unit 63 when the power supply voltage exceeds the second preset voltage. Wherein, the second preset voltage may be the maximum power supply voltage that the power module 6 can carry.

Preferably, the overcurrent protection detection unit 63 may include: a charging switch 631 , a first resistor 632 , a current monitoring unit 633 , and a second resistor 634 , see FIG. 7 .

As shown in FIG. 7 , the first resistor 632 can be an overcurrent detection resistor Rsense, and the second resistor can be Rout. The charging switch 631 is located between the power interface 61 and the first resistor 632; the first resistor 632 is located between the power chip 64 and the charging switch 631; the current monitoring unit 633 is connected to both ends of the first resistor 632 for sensing The sensing voltage at both ends of the first resistor 632, and output the power supply current Iout to the second resistor according to the sensing voltage; the second resistor 634, the node at the output end of the current monitoring unit 633 is electrically connected to the control chip, and the control chip 62 is connected to the control chip according to the power supply The current Iout can determine the voltage Vout of the second resistor, and the opening and closing of the charging switch 631 can be controlled according to the voltage Vout of the second resistor.

Specifically, when the control chip 62 detects that the voltage Vout of the second resistor Rout is greater than the second preset voltage, it can control the charging switch 631 to turn off and stop supplying power to the power chip, thereby protecting the power module 6 .

Preferably, the charging switch 631 may further include a first charging switch 6310 and a second charging switch 6311, and the power module 6 may further include a battery unit 65, see FIG. 8 .

As shown in FIG. 8, the control chip 62 is connected to the battery unit 65 through the first charging switch 6310, and is used to supply power to the power chip 64 through the battery unit 65;

The control chip 62 is also connected to the external power supply through the second charging switch 6311, and is used to supply power to the power chip 64 through the external power supply.

During specific implementation, the power interface 61 can be a USB (Universal Serial Bus, Universal Serial Bus) interface. The external power supply charges the power chip 64; when the external power supply is not connected to the power module 6, the control chip 62 can control the first charging switch 6310 to close, at this time, the battery unit 62 can charge the power chip 64.

In addition, when the control chip 62 detects that the voltage Vout of the second resistor is greater than the second preset voltage, the control chip 64 can control the ports of the first charging switch 6310 and the second charging switch 6311 to protect the power module 6 .

Optionally, in order for the control chip 62 to accurately detect the voltage Vout of the second resistor, the overcurrent protection detection unit may further include a filter unit 635, see FIG. 9 .

It can be seen from FIG. 9 that the filtering unit 635 is connected in parallel with the second resistor 634 for filtering the supply current.

According to the above content, it can be seen that for double speakers or multiple speakers, it is no longer necessary to manually measure whether there is a short circuit between the two speaker interfaces with a multimeter, but after the detection module is electrically connected to the speaker interface, by collecting When the impedance voltage of the channel formed by the closed circuit is determined by the main control module and the impedance voltage on the channel is greater than the first preset voltage, it can be determined that the two speaker interfaces on the channel are qualified. The horn can quickly detect the horn, thereby improving the detection efficiency of the dual-speaker interface or multi-speaker interface. In addition, by setting an overcurrent protection detection unit inside the power module, the power module can also be protected.

Based on the same technical concept, the embodiment of the present invention also provides a method for detecting the horn, as shown in Figure 10, the method may include:

S101. Collect the impedance voltage of each channel, and the channel is formed by a closed circuit of any two speaker interfaces.

S102. Determine whether the impedance voltage of any channel is greater than the first preset voltage, if yes, go to step S103, otherwise, go to step S104.

S103. Determine that the two speaker interfaces on the channel are qualified.

S104. Determine that the two speaker interfaces on the channel are unqualified.

In summary, the speaker detection device and method provided by the embodiments of the present invention include: at least four speaker interfaces, a detection module, and a main control module; the detection module is electrically connected to the speaker interface, and is used to collect the impedance voltage of each channel, The channel is formed by a closed circuit of any two speaker interfaces; the main control module is electrically connected to the detection module, and is used to judge whether the impedance voltage of any channel is greater than the first preset voltage, and if so, determine the The two speaker interfaces on the channel are qualified. It can be seen that for double speakers or multiple speakers, it is no longer necessary to manually measure whether there is a short circuit between the two speaker interfaces through a multimeter. Impedance voltage of the formed channel, and when the main control module judges that the impedance voltage on the channel is greater than the first preset voltage, it can be determined that the two speaker interfaces on the channel are qualified. Therefore, for double speakers or multiple speakers, it can Quickly detect the speakers, so as to improve the detection efficiency of the dual-speaker interface or multi-speaker interface.

While preferred embodiments of the invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention also intends to include these modifications and variations.

Claims (10)

1. A horn detection device, characterized in that, comprising: at least four horn interfaces, a detection module, and a main control module; The detection module is electrically connected to the speaker interface, and is used to collect the impedance voltage of each channel, and the channel is formed by a closed circuit of any two speaker interfaces; The main control module is electrically connected to the detection module, and is used to judge whether the impedance voltage of any channel is greater than the first preset voltage, and if so, determine that the two speaker interfaces on the channel are qualified. 2. The device according to claim 1, wherein the detection module comprises: a digital logic control unit, a switch unit positioned on each channel and an impedance voltage acquisition unit; The digital logic control unit is electrically connected to the main control module and the switch unit, and is used to receive control information from the main control module, and control the working state of the switch unit according to the control information; The impedance voltage acquisition unit on each channel is configured to calculate the channel impedance voltage when the corresponding channel forms a path. 3. The device according to claim 2, wherein the impedance voltage acquisition unit comprises: a voltage dividing resistor and an impedance voltage acquisition port; One end of the voltage dividing resistor is connected to one end of the impedance voltage acquisition port, and the other end of the voltage dividing resistor is connected to a public power supply; One end of the impedance voltage acquisition port is also connected to a speaker interface through a switch unit, and the other end of the channel is respectively connected to ground and another speaker interface; Each channel shares an impedance voltage acquisition unit. 4. The device according to claim 1, further comprising: an alarm module and an LCD display; The LCD display screen is electrically connected to the main control module, and is used to display the impedance value corresponding to each channel, and the impedance value is calculated by the main control module according to the impedance voltage of each channel; The alarm module is electrically connected to the main control module, and is used to receive the first indication information sent by the main control module, and send an alarm prompt information according to the first indication information, and the first indication information is the Generated when the main control module determines that the two speaker interfaces on any channel are unqualified. 5. The device according to claim 4, further comprising: a power module; The power supply module is used to supply power to the power load side, and the power load side includes at least one of the detection module, the main control module, the alarm module and the LCD display screen. 6. The device according to claim 5, wherein the power module comprises: a control chip, an overcurrent protection detection unit, a power chip, and a power interface; The power interface is used to connect with the power supply; The overcurrent protection detection unit is connected between the power chip and the power interface, and is used to detect the power supply voltage output by the power supply to the power chip; One end of the power chip is connected to the overcurrent protection detection unit, and the other end is connected to the power load; The control chip is connected to the overcurrent protection detection unit, and is used to disconnect the power supply and the power supply chip through the overcurrent protection detection unit when the power supply voltage exceeds a second preset voltage. connect. 7. The device according to claim 6, wherein the overcurrent protection detection unit comprises: a charging switch, a first resistor, a current monitoring unit, and a second resistor; The charging switch is located between the power interface and the first resistor; The first resistor is located between the power chip and the charging switch; The current monitoring unit is connected to both ends of the first resistor, and is used to sense a sensing voltage at both ends of the first resistor, and output a supply current to the second resistor according to the sensing voltage; The second resistor is located between the output terminal of the current monitoring unit and the ground terminal; The node between the second resistor and the output terminal of the current monitoring unit is electrically connected to the control chip, the control chip determines the voltage of the second resistor according to the supply current, and determines the voltage of the second resistor according to the second resistor The voltage controls the opening and closing of the charging switch. 8. The method according to claim 7, wherein the charging switch comprises a first charging switch and a second charging switch; the power module further comprises a battery unit; The control chip is connected to the battery unit through the first charging switch, and is used to supply power to the power chip through the battery unit; The control chip is also electrically connected to the power supply through the second charging switch, for supplying power to the power chip through the power supply. 9. The device according to claim 8, wherein the overcurrent protection detection unit further comprises: a filtering unit; The filtering unit is connected in parallel with the second resistor, and is used for filtering the supply current. 10. A method for detecting a loudspeaker, comprising: Collect the impedance voltage of each channel, and the channel is formed by a closed circuit of any two speaker interfaces; It is judged whether the impedance voltage of any channel is greater than the first preset voltage, and if so, it is determined that the two speaker interfaces on the channel are qualified.