Sound field controller

Abstract

Provided is a sound field controller. According to the utility model, a power amplifier is connected with a sound field controller, the sound field controller is connected with three loudspeaker groups, the sound field controller comprises an MCU, a PHY and three partitions, one loudspeaker group is connected with one partition, the partitions comprise a first partition, a second partition and a third partition, and each partition comprises three relays. The relay comprises an initial relay, a first relay and a second relay, the relay comprises two groups of automatic switches, each automatic switch comprises two input interfaces and an output interface, the MCU comprises an I / O interface chip and an analog-to-digital converter, the MCU is connected with the PHY, and the PHY is used for transmitting external signals to the MCU; the power amplifier is connected with the initial relay, the initial relay is connected with the first relay, and the first relay is connected to the loudspeaker group. According to the utility model, the problem that each sound field cannot be independently detected due to the fact that one power amplifier controls a plurality of sound fields in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of broadcast control, in particular to a sound field controller. Background Art

[0002] The existing technology generally adopts one power amplifier corresponding to one sound field partition. When the business requires multiple small sound field partitions, multiple power amplifiers are needed to achieve it, resulting in unnecessary waste.

[0003] Therefore, there is no effective solution to the technical problem in the prior art that one power amplifier controls multiple sound fields, resulting in the inability to detect each sound field separately. Utility Model Content

[0004] The purpose of the utility model is to provide a sound field controller to solve the problem in the related art that one power amplifier controls multiple sound fields, resulting in that each sound field cannot be detected separately.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A sound field controller includes a power amplifier connected to the sound field controller, the sound field controller is connected to three groups of speaker groups, the sound field controller includes an MCU, a PHY and three partitions, one speaker group is connected to one partition, the partitions include a first partition, a second partition and a third partition, the partitions include three relays, the relays include an initial relay, a first relay and a second relay, the relays include two groups of automatic switches, the automatic switches include two input interfaces and one output interface, the MCU includes an I / O interface chip and an analog-to-digital converter; the power amplifier is connected to the initial relay, the initial relay is connected to the first relay, and the first relay is connected to the speaker group; the I / O interface chip is connected to the second relay via an I / O interface circuit, the analog-to-digital converter is connected to the second relay via a first analog-to-digital conversion circuit, and the second relay is connected to the first relay; the analog-to-digital converter is connected to the output interface of the initial relay via a second analog-to-digital conversion circuit, the MCU is connected to the PHY, and the PHY is used to transmit external signals to the MCU.

[0007] It is further configured as follows: the output interface of the initial relay is connected to a voltage divider resistor, a capacitor and an inductor in sequence, one output interface of the inductor is grounded, the other output interface is connected to a third operational amplifier and a rectifier diode in sequence, and the rectifier diode is connected to an analog-to-digital converter; the two output interfaces of the first relay are connected in series with a sound field resistor, and a speaker unit of a speaker group is connected in parallel between the two output interfaces of the first relay.

[0008] It is further configured as follows: the voltage divider resistor includes a first resistor, a second resistor and a third resistor, the first resistor and the second resistor are respectively connected to two branch circuits corresponding to the two output interfaces of the initial relay; the third resistor is connected in parallel between the two branch circuits; the capacitor is connected in parallel between the third resistor and the inductor.

[0009] It is further configured as follows: the two output interfaces of the initial relay are respectively connected to one input interface of each of the two groups of automatic switches of the first relay, and the remaining two input interfaces of the first relay are respectively connected to the two output interfaces of the second relay; the second relay includes a first input interface, a second input interface, a third input interface and a fourth input interface, wherein the first input interface and the second input interface belong to the same group of automatic switches, and the third input interface and the fourth input interface belong to the same group of automatic switches; the first input interface is connected to a pull-up resistor; and the third input interface is grounded.

[0010] It is further configured as follows: the I / O interface chip is connected to the PE detection module, the two output interfaces of the PE detection module are respectively connected to the second input interface and the fourth input interface of the second relay; the analog-to-digital converter is connected to the fourth operational amplifier, the fourth operational amplifier is connected to the isolation operational amplifier, one output interface of the isolation operational amplifier is grounded, and the other output interface is connected to the first input interface of the second relay.

[0011] Compared with the existing technology, the beneficial technical effects of the present invention are as follows: the present invention integrates a power amplifier, a sound field controller and three groups of speakers, realizing efficient and flexible audio zone management. The sound field controller serves as the core, with a built-in MCU, PHY and three independent partitions. Each partition precisely corresponds to a speaker group, ensuring the independence and controllability of the audio output. The audio output of the power amplifier first enters the sound field controller through the initial relay, and is then directly connected to the speaker group by the first relay to realize the transmission of the audio signal. As the intelligent control center, the MCU receives instructions through the network to precisely control each partition, and can also detect and report the device status and the sound field conditions of the partition to the network management system in real time. The present invention connects the output of the initial relay through an analog-to-digital converter, realizing the MCU's detection and fault diagnosis functions for audio signals. The present invention supports independent sound field detection for each partition, including multiple states such as open circuit, short circuit, normal and grounded, ensuring the stability and reliability of audio transmission. This refined partition management and detection mechanism enables the system to quickly detect and deal with potential problems, ensuring the overall performance of the audio system and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the partition control structure in the sound field controller of the present utility model;

[0015] Figure 3 This is the control principle diagram of the utility model.

[0016] Figure numerals: 1. initial relay; 2. first relay; 3. second relay; 4. speaker unit; 5. sound field resistor; 6. I / O interface circuit; 7. first analog-to-digital conversion circuit; 8. second analog-to-digital conversion circuit; 9. pull-up resistor; 10. isolation operational amplifier; 11. PE detection module; 121. third operational amplifier; 122. fourth operational amplifier; 13. rectifier diode; 14. first resistor; 15. second resistor; 16. third resistor; 17. capacitor; 18. inductor. DETAILED DESCRIPTION

[0017] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0020] Example

[0021] Reference Figure 1-Figure 3 , is a sound field controller disclosed in the present utility model, which includes: a power amplifier connected to the sound field controller, the sound field controller connected to three groups of speaker groups, the sound field controller including an MCU, a PHY and three partitions, one speaker group is connected to one partition, the partitions include a first partition, a second partition and a third partition, the partitions include three relays, the relays include an initial relay 1, a first relay 2 and a second relay 3, the relays include two groups of automatic switches, the automatic switches include two input interfaces and one output interface, the MCU includes an I / O interface chip and an analog-to-digital converter; the power amplifier is connected to the initial relay 1, the initial relay 1 is connected to the first relay 2, and the first relay 2 is connected to the speaker group; the I / O interface chip is connected to the second relay 3 through an I / O interface circuit 6, the analog-to-digital converter is connected to the second relay 3 through a first analog-to-digital conversion circuit 7, and the second relay 3 is connected to the first relay 2; the analog-to-digital converter is connected to the output interface of the initial relay 1 through a second analog-to-digital conversion circuit 8, the MCU is connected to the PHY, and the PHY is used to transmit external signals to the MCU.

[0022] Specifically, PHY is an external signal interface chip, which is used to transmit external signals to MCU. The audio output of the power amplifier is connected to each partition respectively. MCU controls the partition through network control instructions. MCU can send the device status to the network manager through the network. MCU can send the sound field status of each partition to the network manager through the network.

[0023] When different sound fields need to be controlled, the power amplifier provides power input to the sound field controller. The sound field controller consists of multiple zones, each corresponding to a speaker group. The MCU controls the zones and outputs signals to the corresponding speaker groups. When testing is required, the MCU can test any individual zone and its corresponding speaker group.

[0024] In addition, through the three partitions in the sound field controller (first partition, second partition, and third partition), the three groups of speakers can be controlled independently to achieve partitioned playback or independent adjustment of sound. This design is very suitable for application scenarios that require precise control of the sound propagation area and intensity. Each partition contains three relays (initial relay 1, first relay 2, and second relay 3). These relays can achieve fine adjustment of the volume of the speaker group by automatically switching the circuit on and off. In particular, the second relay 3 is controlled by the I / O interface chip and analog-to-digital converter (ADC) of the MCU (microcontroller unit), combined with the connection of the first relay 2, to provide more levels of volume control strategies.

[0025] The following further configurations are provided: the output interface of the initial relay 1 is sequentially connected to a voltage divider resistor, a capacitor, and an inductor 18; one output interface of the inductor 18 is grounded, and the other output interface is sequentially connected to a third operational amplifier 121 and a rectifier diode 13; the rectifier diode 13 is connected to an analog-to-digital converter; the two output interfaces of the first relay 2 are connected in series with a sound field resistor 5, and a speaker unit 4 is connected in parallel between the two output interfaces of the first relay 2. The voltage divider resistors include a first resistor 14, a second resistor 15, and a third resistor 16. The first resistor 14 and the second resistor 15 are respectively connected to the two branch circuits corresponding to the two output interfaces of the initial relay 1; the third resistor 16 is connected in parallel between the two branch circuits; and the capacitor is connected in parallel between the third resistor 16 and the inductor 18.

[0026] Specifically, the voltage divider resistor steps down the output voltage of the power amplifier and filters out the noise through the capacitor 17 to obtain the stepped-down audio. The third operational amplifier 121 and the rectifier diode 13 precisely rectify the stepped-down audio and output it to the analog-to-digital converter of the MCU. The MCU determines whether there is audio input.

[0027] It is further configured as follows: the two output interfaces of the initial relay 1 are respectively connected to one input interface of each of the two groups of automatic switches of the first relay 2, and the remaining two input interfaces of the first relay 2 are respectively connected to the two output interfaces of the second relay 3; the second relay 3 includes a first input interface, a second input interface, a third input interface and a fourth input interface, wherein the first input interface and the second input interface belong to the same group of automatic switches, and the third input interface and the fourth input interface belong to the same group of automatic switches; the first input interface is connected to the pull-up resistor 9; and the third input interface is grounded.

[0028] It is further configured as follows: the I / O interface chip is connected to the PE detection module 11, the two output interfaces of the PE detection module 11 are respectively connected to the second input interface and the fourth input interface of the second relay 3; the analog-to-digital converter is connected to the fourth operational amplifier 122, the fourth operational amplifier 122 is connected to the isolation operational amplifier 10, one output interface of the isolation operational amplifier 10 is grounded, and the other output interface is connected to the first input interface of the second relay 3.

[0029] Specifically, after the sound field line detection is completed, PE detection is performed, including: the second relay 3 switches to the PE detection circuit, and the PE detection module 11 detects whether the entire sound field loop is connected to PE. If so, the MCU is notified through the I / O interface chip, where the PE connection phenomenon means that the speaker line output by the partition is connected to the PE protective ground wire.

[0030] The utility model also discloses a sound field control method, including connecting the audio output of the power amplifier to the initial relay 1 of the partition, and the MCU controlling the initial relay 1 to close so that the partition outputs audio; the MCU detects whether there is audio input, including: the voltage divider resistor steps down the output voltage of the power amplifier and filters out the noise through the capacitor 17 to obtain the stepped-down audio, the third operational amplifier 121 and the rectifier diode 13 perform precise rectification on the stepped-down audio, and output it to the analog-to-digital converter of the MCU, and the MCU determines whether there is audio input.

[0031] Specifically, when controlling the audio output, after the MCU receives the control instruction through the network, it closes the initial relay 1 of the partition, and then the MCU sends a closing signal to the first relay 2, at which point the partition outputs audio. The MCU can accurately control the closing and opening of the initial relay 1, thereby achieving independent control of different audio partitions. This flexibility enables the system to quickly adjust the audio output according to actual needs, and is suitable for multi-scenario and multi-purpose audio playback requirements. Through the combination of the voltage divider resistor and the capacitor 17, the system can effectively reduce the high-voltage audio signal output by the power amplifier and filter out the clutter and noise therein to obtain a purer step-down audio signal. The precision rectification circuit of the third operational amplifier 121 and the rectifier diode 13 further processes the step-down audio signal and converts it into a DC signal suitable for processing by the analog-to-digital converter. This process improves the accuracy and reliability of audio signal detection. The analog-to-digital converter of the MCU converts the rectified DC signal into a digital signal and judges it through an internal algorithm to accurately identify whether there is audio input. This digital processing method enhances the system's anti-interference ability and detection sensitivity.

[0032] It is further configured as follows: when the MCU detects audio input or receives a zone opening instruction through the network, the first relay 2 remains in a closed state, and the power amplifier outputs the audio to the speaker group corresponding to the partition through the initial relay 1 and the first relay 2; when the MCU detects no audio input or receives a zone closing instruction through the network, the first relay 2 switches to the sound field detection circuit to detect the sound field line, wherein the sound field detection circuit includes a second relay 3, a pull-up resistor 9, an isolation operational amplifier 10 and a fourth operational amplifier 122.

[0033] Specifically, when the MCU detects audio input or receives a zone-opening command, First Relay 2 remains closed, ensuring that the power amplifier's audio output can smoothly pass through Initial Relay 1 and First Relay 2 to the corresponding speaker group in the zone. This intelligent management approach improves the audio system's responsiveness and flexibility. When the MCU detects no audio input or receives a zone-closing command, First Relay 2 switches to the sound field detection circuit for line testing. This feature helps promptly identify and resolve line faults, ensuring the stability and reliability of the audio system. It also supports line maintenance and inspection even when the system is not playing audio.

[0034] It is further configured as follows: when the second relay 3 is in a normally closed state and the sound field cable is in a normal state, the pull-up resistor 9, the sound field cable, and the sound field resistor 5 form a DC path, and the isolation operational amplifier 10 detects the sum of the DC voltages of the sound field cable and the sound field resistor 5, and outputs it to the analog-to-digital converter of the MCU after adjustment through the fourth operational amplifier 122. The analog-to-digital converter determines that the sound field is normal based on a preset voltage threshold; when the sound field line is short-circuited, the sound field resistor 5 is short-circuited, and the upper resistor and the sound field line form a DC path. The isolation operational amplifier 10 detects the DC voltage of the sound field cable, and outputs it to the analog-to-digital converter of the MCU after adjustment through the fourth operational amplifier 122. The analog-to-digital converter determines that the sound field is short-circuited based on a preset voltage threshold.

[0035] Specifically, when the sound field cable is in a normal state, the pull-up resistor 9, the sound field cable and the sound field resistor 5 together form a DC path. The isolation amplifier 10 can detect the sum of the voltages at both ends of the sound field cable and the sound field resistor 5. This voltage value reflects the normal state of the circuit. Through the adjustment of the fourth operational amplifier 122, this voltage value is converted into a digital signal suitable for reading by the MCU analog-to-digital converter. The MCU can accurately determine whether the sound field circuit is normal based on a preset voltage threshold. When the sound field circuit is short-circuited, the sound field resistor 5 is short-circuited. At this time, the pull-up resistor 9 and the sound field circuit are directly connected to form a new DC path. What the isolation amplifier 10 detects is the DC voltage on the sound field cable. This voltage value is usually lower than the voltage value in the normal state (because the sound field resistor 5 is short-circuited and its voltage divider effect disappears). Similarly, after adjustment by the fourth operational amplifier 122, this voltage value is converted into a digital signal, and the MCU can determine whether the sound field circuit is short-circuited based on a preset voltage threshold.

[0036] The system is further configured as follows: when an open circuit occurs in the sound field circuit, the isolation op amp 10 detects the DC voltage of the upper resistor, adjusts it through the fourth operational amplifier 122, and outputs it to the analog-to-digital converter of the MCU. The analog-to-digital converter then determines that the sound field circuit is open based on a preset voltage threshold. After the sound field circuit detection is completed, a PE detection is performed, including: the second relay 3 switches to the PE detection circuit, and the PE detection module 11 detects whether the entire sound field circuit is connected to the PE. If so, the MCU is notified via the I / O interface chip. The PE connection phenomenon refers to the connection of the PE protective ground wire to the speaker group line of the zone output.

[0037] The working principle and beneficial effects of the present invention are as follows: the present invention integrates a power amplifier, a sound field controller and three groups of speakers to achieve efficient and flexible audio zone management. The sound field controller serves as the core, with a built-in MCU, PHY and three independent partitions. Each partition precisely corresponds to a speaker group, ensuring the independence and controllability of the audio output. The audio output of the power amplifier first enters the sound field controller through the initial relay 1, and is then directly connected to the speaker group by the first relay 2 to achieve the transmission of the audio signal. As the intelligent control center, the MCU receives instructions through the network to precisely control each partition, and can also detect and report the device status and the zone sound field status to the network management system in real time. The present invention is connected to the output of the initial relay 1 through an analog-to-digital converter, enabling the MCU to detect and diagnose audio signals. The present invention supports independent sound field detection for each partition, including multiple states such as open circuit, short circuit, normal and grounded, ensuring the stability and reliability of audio transmission. This refined partition management and detection mechanism enables the system to quickly discover and deal with potential problems, ensuring the overall performance of the audio system and user experience.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sound field controller, characterized in that: include: The power amplifier is connected to a sound field controller, the sound field controller is connected to three groups of speaker groups, the sound field controller includes an MCU, a PHY and three partitions, one speaker group is connected to one partition, the partitions include a first partition, a second partition and a third partition, the partitions include three relays, the relays include an initial relay (1), a first relay (2) and a second relay (3), the relays include two groups of automatic switches, the automatic switches include two input interfaces and one output interface, the MCU includes an I / O interface chip and an analog-to-digital converter, the MCU is connected to the PHY, and the PHY is used to transmit external signals to the MCU; The power amplifier is connected to the initial relay (1), the initial relay (1) is connected to the first relay (2), and the first relay (2) is connected to the speaker group; The I / O interface chip is connected to the second relay (3) via an I / O interface circuit (6), the analog-to-digital converter is connected to the second relay (3) via a first analog-to-digital conversion circuit (7), and the second relay (3) is connected to the first relay (2); The analog-to-digital converter is connected to the output interface of the initial relay (1) via a second analog-to-digital conversion circuit (8).

2. A sound field controller according to claim 1, characterized in that: include: The output interface of the initial relay (1) is sequentially connected to a voltage divider resistor, a capacitor, and an inductor (18); one output interface of the inductor (18) is grounded; the other output interface is sequentially connected to a third operational amplifier (121) and a rectifier diode (13); and the rectifier diode (13) is connected to the analog-to-digital converter; The two output interfaces of the first relay (2) are connected in series with a sound field resistor (5), and a speaker group speaker unit (4) is connected in parallel between the two output interfaces of the first relay (2).

3. A sound field controller according to claim 2, characterized in that: include: The voltage-dividing resistor comprises a first resistor (14), a second resistor (15), and a third resistor (16); the first resistor (14) and the second resistor (15) are respectively connected to two branch circuits corresponding to the two output interfaces of the initial relay (1); The third resistor (16) is connected in parallel between the two branch circuits; The capacitor is connected in parallel between the third resistor (16) and the inductor (18).

4. The sound field controller according to claim 1, characterized in that: include: The two output interfaces of the initial relay (1) are connected to one input interface of each of the two groups of automatic switches of the first relay (2), and the remaining two input interfaces of the first relay (2) are connected to the two output interfaces of the second relay (3); The second relay (3) comprises a first input interface, a second input interface, a third input interface and a fourth input interface, wherein the first input interface and the second input interface belong to the same group of automatic switches, and the third input interface and the fourth input interface belong to the same group of automatic switches; The first input interface is connected to a pull-up resistor (9); The third input interface is grounded.

5. The sound field controller according to claim 4, characterized in that: include: The I / O interface chip is connected to a PE detection module (11), and two output interfaces of the PE detection module (11) are respectively connected to the second input interface and the fourth input interface of the second relay (3); The analog-to-digital converter is connected to a fourth operational amplifier (122), the fourth operational amplifier (122) is connected to an isolation operational amplifier (10), one output interface of the isolation operational amplifier (10) is grounded, and the other output interface is connected to the first input interface of the second relay (3).

Images