Loudspeaker detection circuit, device and system of digital intelligent fire fighting system

Abstract

The utility model relates to a loudspeaker detection circuit, device and system of a digital intelligent fire extinguishing system, the loudspeaker detection circuit of the digital intelligent fire extinguishing system is connected with a loudspeaker, a host and an MCU, and the loudspeaker detection circuit of the digital intelligent fire extinguishing system comprises a first inductor, an operational amplifier, a first RC circuit, a second RC circuit and a detection input circuit, the first inductor, the first RC circuit and the positive electrode end of the operational amplifier are sequentially connected, the second RC circuit is connected with the negative electrode end and the output end of the operational amplifier, the output end of the operational amplifier is connected with the detection input circuit, and the first inductor is used for obtaining induction current in the signal transmission process sent by a host. Due to the fact that the first inductor, the operational amplifier and the detection input circuit are arranged, induced current generated in the signal transmission process can be accurately captured, the working state of the loudspeaker can be effectively detected, the reliability and stability of the system are improved, professional equipment does not need to be relied on, and the detection cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of fire broadcasting, and in particular, to a speaker detection circuit, device and system for a digital intelligent fire system. Background Art

[0002] Background music is provided in many public places, which requires simple and convenient control to facilitate the public. However, in the event of a fire emergency, the existing broadcast control host is difficult to detect fires and broadcast emergency notifications in different areas.

[0003] Most speaker testing systems on the market rely on acoustic sensors to capture the speaker's sound output to determine whether it is functioning properly. However, if the speaker doesn't output sound, it's impossible to verify its working condition after installation. Furthermore, speaker performance testing requires specialized equipment, making it inconvenient to perform on-site post-installation testing. Utility Model Content

[0004] The purpose of this application is to provide a speaker detection circuit, device and system for a digital intelligent fire protection system to solve the problem that the existing speaker detection method of the digital intelligent fire protection system is difficult to detect the working status of the speaker after installation.

[0005] In order to solve the above problems, this application adopts the following technical solutions:

[0006] The first aspect of the present application provides a speaker detection circuit of a digital intelligent fire protection system, wherein the speaker detection circuit of the digital intelligent fire protection system is respectively connected to a speaker, a host and an MCU, and the speaker detection circuit of the digital intelligent fire protection system includes: a first inductor, an operational amplifier, a first RC circuit, a second RC circuit and a detection input circuit, wherein the first inductor, the first RC circuit and the positive terminal of the operational amplifier are connected in sequence, the second RC circuit is respectively connected to the negative terminal and the output terminal of the operational amplifier, and the output terminal of the operational amplifier is connected to the detection input circuit; wherein the first inductor is used to obtain the induced current during the transmission process of the signal emitted by the host.

[0007] By using the first inductor, operational amplifier and detection input circuit, the induced current generated during signal transmission can be accurately captured, which can effectively detect the working status of the speaker, improve the reliability and stability of the system, and eliminate the need for professional equipment, thereby reducing detection costs.

[0008] Furthermore, the first RC circuit includes a first resistor and a first capacitor, one end of the first resistor is connected to one end of the first inductor and one end of the first capacitor respectively, and the other end of the first resistor and the other end of the first capacitor are both connected to electricity.

[0009] By including a first RC circuit consisting of a first resistor and a first capacitor in the detection circuit, the induced current generated during the signal transmission process can be filtered, effectively suppressing noise and interference, improving the stability of the detection signal, and optimizing the signal amplification effect.

[0010] Furthermore, the first RC circuit includes two third resistors, one end of each of the third resistors is connected to the first capacitor, the other end of one of the third resistors is connected to the positive terminal of the operational amplifier, and the other end of the other third resistor is connected to the positive terminal of the operational amplifier.

[0011] By setting two third resistors, the input impedance of the operational amplifier is optimized, so that the operational amplifier can better receive and process the filtered signal, enhance the stability of the circuit, and improve the signal amplification efficiency.

[0012] Furthermore, the speaker detection circuit of the digital intelligent fire protection system includes a voltage-stabilizing diode, and the voltage-stabilizing diode is respectively connected to the positive terminal and the negative terminal of the operational amplifier.

[0013] By providing a voltage stabilizing diode in a speaker detection circuit of a digital intelligent fire protection system, overvoltage protection can be provided between the positive terminal and the negative terminal of an operational amplifier, thereby improving the stability of the circuit.

[0014] Furthermore, there are two voltage stabilizing diodes, and the two voltage stabilizing diodes are arranged in opposite directions.

[0015] By using two Zener diodes and setting them in opposite directions, bidirectional voltage protection can be provided at the positive and negative ends of the circuit, thereby enhancing the protection capability of the circuit and ensuring the stable operation of the circuit.

[0016] Furthermore, the second RC circuit includes a second resistor and a second capacitor, one end of the second resistor and one end of the second capacitor are both connected to the negative terminal of the operational amplifier, and the other end of the second resistor and the other end of the second capacitor are both connected to the output terminal of the operational amplifier.

[0017] The second RC circuit optimizes the output impedance of the operational amplifier and reduces signal distortion, so that the output signal of the operational amplifier can be further filtered and stabilized, thereby improving the accuracy and stability of the signal and ensuring the reliability of the detection result.

[0018] Furthermore, the speaker detection circuit of the digital intelligent fire protection system includes a third capacitor, and two ends of the third capacitor are respectively connected to the output end of the operational amplifier and the detection input circuit.

[0019] By setting a third capacitor in the speaker detection circuit of the digital intelligent fire protection system, it helps to smooth the signal and reduce signal loss during transmission, reduce signal interference and improve circuit stability.

[0020] Furthermore, the speaker detection circuit of the digital intelligent fire protection system includes a fourth capacitor and a fourth resistor, and the first RC circuit, the fourth capacitor, the fourth resistor and the negative terminal of the operational amplifier are connected in sequence.

[0021] Due to the series connection of the first RC circuit, the fourth capacitor and the fourth resistor, the input impedance of the operational amplifier is optimized, which helps to remove high-frequency noise and interference in the signal, improve the clarity of the signal, and enhance the stability of the circuit.

[0022] The present application also provides a speaker detection device for a digital intelligent fire fighting system, comprising a shell having a receiving cavity formed therein, and a speaker detection circuit for the digital intelligent fire fighting system as described in any one of the above items, which is arranged in the shell.

[0023] The present application also provides a speaker detection system for a digital intelligent fire fighting system, and the speaker detection system for the digital intelligent fire fighting system includes the above-mentioned speaker detection device for the digital intelligent fire fighting system.

[0024] Compared to the prior art, the present invention has the following advantages: the second RC circuit is connected to the negative terminal and output terminal of the operational amplifier, the output terminal of the operational amplifier is connected to the detection input circuit, and the first inductor is used to obtain the induced current during the signal transmission process from the host. When the speaker is abnormal, the induced current is amplified by the operational amplifier, and the MCU captures and analyzes the amplified induced current in real time and transmits it to the host, thereby completing the detection of the speaker status. Due to the presence of the first inductor, operational amplifier, and detection input circuit, the induced current generated during the signal transmission process can be accurately captured, effectively detecting the operating status of the speaker, improving the reliability and stability of the system, and eliminating the need for specialized equipment, reducing detection costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of a speaker detection circuit of a digital intelligent fire protection system provided in an embodiment of the present application;

[0026] Figure 2 A schematic diagram of a speaker detection system for a digital intelligent fire protection system provided in an embodiment of the present application; and

[0027] Figure 3 A system diagram of a speaker detection system for a digital intelligent fire protection system provided in an embodiment of the present application.

[0028] Description of reference numerals:

[0029] 100, first inductor; 200, operational amplifier; 300, second RC circuit; 310, second capacitor; 320, second resistor; 400, detection input circuit; 500, first RC circuit; 510, first capacitor; 520, first resistor; 530, third resistor; 600, Zener diode; 700, fourth capacitor; 800, fourth resistor; 900, third capacitor. DETAILED DESCRIPTION

[0030] The specific implementation methods of this application are described in detail below with reference to the accompanying drawings.

[0031] It should be noted that, unless there is a conflict, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of this application and should not be regarded as an improper restriction on this application.

[0032] It should be understood that the orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings. These orientation terms are only used to facilitate the description of this application and simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting this application.

[0033] Figure 1 This is a schematic diagram of a speaker detection circuit of a digital intelligent fire protection system provided in an embodiment of the present application. Figure 2 This is a schematic diagram of a speaker detection system for a digital intelligent fire protection system provided in an embodiment of the present application. Figure 3 A system diagram of a speaker detection system for a digital intelligent fire protection system provided in an embodiment of the present application.

[0034] like Figures 1 to 3 As shown, an embodiment of the present application provides a speaker detection circuit of a digital intelligent fire protection system, wherein the speaker detection circuit of the digital intelligent fire protection system is respectively connected to a speaker, a host and an MCU, and the speaker detection circuit of the digital intelligent fire protection system includes: a first inductor 100, an operational amplifier 200, a first RC circuit 500, a second RC circuit 300 and a detection input circuit 400, wherein the positive terminals of the first inductor 100, the first RC circuit 500 and the operational amplifier 200 are connected in sequence, the second RC circuit 300 is respectively connected to the negative terminal and the output terminal of the operational amplifier 200, and the output terminal of the operational amplifier 200 is connected to the detection input circuit 400; wherein, the first inductor 100 is used to obtain the induced current during the transmission process of the signal emitted by the host.

[0035] Specifically, the first inductor 100 is connected to the signal input end of the speaker to capture the induced current generated during the signal transmission process, and the first RC circuit 500, the operational amplifier 200, the second RC circuit 300 and the detection input circuit 400 are connected in sequence to form a detection circuit path. The speaker detection circuit of the digital intelligent fire fighting system is connected to the host and the MCU. The MCU is built into the speaker detection circuit of the digital intelligent fire fighting system for capturing and analyzing the induced current in real time.

[0036] When the host sends a signal, the first inductor 100 captures the induced current, and the operational amplifier 200 amplifies the induced current, allowing the MCU to accurately capture and analyze changes in the induced current. Based on the MCU's analysis of the induced current, the operating status of the speaker is determined. If the induced current changes within the normal range, the speaker is operating normally. If the induced current changes abnormally, there may be a problem with the speaker, requiring further inspection.

[0037] It should be noted that when the speaker is abnormal, the induced current is amplified by the operational amplifier 200, and the MCU captures and analyzes the amplified induced current in real time and transmits it to the host.

[0038] By using the first inductor 100, the operational amplifier 200 and the detection input circuit 400, the induced current generated during the signal transmission process can be accurately captured, and the working status of the speaker can be effectively detected, thereby improving the reliability and stability of the system, eliminating the need for professional equipment, and reducing detection costs.

[0039] In some embodiments, the first RC circuit 500 includes a first resistor 520 and a first capacitor 510 , one end of the first resistor 520 is connected to the first inductor 100 and one end of the first capacitor 510 , respectively, and the other end of the first resistor 520 and the other end of the first capacitor 510 are both connected to power.

[0040] Specifically, one end of the first resistor 520 is connected to one end of the first inductor 100, and the other end of the first resistor 520 is connected to one end of the first capacitor 510, wherein the connection is ensured to be stable to prevent signal leakage or interference. The other end of the first resistor 520 and the other end of the first capacitor 510 are both connected to power, indicating that the other ends of these two components are connected to the power supply level to ensure that the circuit can work properly. It should be noted that

[0041] Step 4: Before the speaker detection circuit is operated, it is tested first. For example, use a multimeter or oscilloscope to test whether the connection of the first RC circuit 500 is correct to ensure that the circuit is not open or short-circuited. According to the actual circuit requirements, adjust the parameters of the first resistor 520 and the first capacitor 510, such as the resistance value and the capacitance value, to meet specific signal processing requirements.

[0042] By including a first RC circuit 500 consisting of a first resistor 520 and a first capacitor 510 in the detection circuit, the induced current generated during the signal transmission process can be filtered, effectively suppressing noise and interference, improving the stability of the detection signal, and optimizing the signal amplification effect.

[0043] In some embodiments, the first RC circuit 500 includes two third resistors 530, one end of each of the third resistors 530 is connected to the first capacitor 510, the other end of one third resistor 530 is connected to the positive terminal of the operational amplifier 200, and the other end of the other third resistor 530 is connected to the power supply.

[0044] Specifically, one end of each of the two third resistors 530 is connected to one end of the first capacitor 510. The other end of one of the third resistors 530 is connected to the positive terminal of the operational amplifier 200 to ensure that the operational amplifier 200 can properly process the signal. The other end of the other third resistor 530 is connected to a power supply. The first RC circuit 500 is integrated into the speaker detection circuit of the digital intelligent fire protection system and works together with other circuit components (such as the first inductor 100, the operational amplifier 200, the second RC circuit 300, and the detection input circuit 400) to detect the operating status of the speaker.

[0045] By providing two third resistors 530 , the input impedance of the operational amplifier 200 is optimized, so that the operational amplifier 200 can better receive and process the filtered signal, thereby enhancing the stability of the circuit and improving the signal amplification efficiency.

[0046] In some embodiments, the speaker detection circuit of the digital intelligent fire protection system includes a Zener diode 600 , which is connected to the positive terminal and the negative terminal of the operational amplifier 200 , respectively.

[0047] Specifically, the selection of a Zener diode 600 should be based on the required regulated voltage and power consumption. Zener diode 600 is connected to the positive and negative terminals of operational amplifier 200. The regulated voltage of Zener diode 600 is adjusted based on actual circuit requirements to meet specific signal processing requirements. Zener diode 600 is then integrated into the speaker detection circuit of the digital intelligent fire protection system and connected to other circuit components.

[0048] By providing a voltage stabilizing diode 600 in the speaker detection circuit of the digital intelligent fire protection system, overvoltage protection can be provided between the positive terminal and the negative terminal of the operational amplifier 200, thereby improving the stability of the circuit.

[0049] In some embodiments, there are two Zener diodes 600 , and the two Zener diodes 600 are arranged in opposite directions.

[0050] Specifically, the anode of a Zener diode 600 should be connected to the positive terminal of the operational amplifier 200, and its cathode should be connected to the negative terminal of the operational amplifier 200; the anode of another Zener diode 600 should be connected to the negative terminal of the operational amplifier 200, and its cathode should be connected to the positive terminal of the operational amplifier 200, to ensure that the operational amplifier 200 can work normally under different voltage conditions.

[0051] By using two voltage stabilizing diodes 600 and arranging them in opposite directions, bidirectional voltage protection can be provided at the positive terminal and the negative terminal of the circuit, thereby enhancing the protection capability of the circuit and ensuring the stable operation of the circuit.

[0052] In some embodiments, the second RC circuit 300 includes a second resistor 320 and a second capacitor 310, one end of the second resistor 320 and one end of the second capacitor 310 are both connected to the negative terminal of the operational amplifier 200, and the other end of the second resistor 320 and the other end of the second capacitor 310 are both connected to the output terminal of the operational amplifier 200.

[0053] Specifically, in the second RC circuit 300, first select a suitable second resistor 320 and select a second capacitor 310. The resistance of the second resistor 320 is determined according to the required time constant and the overall design of the circuit. The material and size of the second resistor 320 should be able to withstand the expected current and voltage level while maintaining stability. The capacitance of the second capacitor 310 is also based on the required time constant and circuit design. Among them, the second capacitor 310 should be selected to be able to withstand the maximum operating voltage and current, and have a type with good stability and an allowable error range. One end of the second resistor 320 is connected to the negative terminal of the operational amplifier 200, and one end of the second capacitor 310 is also connected to the negative terminal of the operational amplifier 200. The other end of the second resistor 320 is connected to the output terminal of the operational amplifier 200, and the other end of the second capacitor 310 is connected to the output terminal of the operational amplifier 200.

[0054] The second RC circuit 300 is used to optimize the output impedance of the operational amplifier 200 and reduce signal distortion, so that the output signal of the operational amplifier 200 is further filtered and stabilized, thereby improving the accuracy and stability of the signal and ensuring the reliability of the detection result.

[0055] In some embodiments, the speaker detection circuit of the digital intelligent fire protection system includes a third capacitor 900 , and two ends of the third capacitor 900 are respectively connected to the output end of the operational amplifier 200 and the detection input circuit 400 .

[0056] Specifically, one end of the third capacitor 900 is connected to the output terminal of the operational amplifier 200, and the other end of the third capacitor 900 is connected to the detection input circuit 400. For example, this is achieved by using wires or appropriate connectors to ensure that the connection is firm and reliable to prevent any accidental disconnection.

[0057] Providing the third capacitor 900 in the speaker detection circuit of the digital intelligent fire protection system helps to smooth the signal and reduce signal loss during transmission, thereby reducing signal interference and improving circuit stability.

[0058] In some embodiments, the speaker detection circuit of the digital intelligent fire protection system includes a fourth capacitor 700 and a fourth resistor 800, and the first RC circuit 500, the fourth capacitor 700, the fourth resistor 800 and the negative terminal of the operational amplifier 200 are connected in sequence.

[0059] Specifically, the first RC circuit 500 includes a resistor and a capacitor, whose parameters are determined based on the desired time constant and the overall circuit design. Both ends of the first RC circuit 500 are connected to the negative terminal of the operational amplifier 200. One end of the fourth capacitor 700 is connected to the negative terminal of the operational amplifier 200, and one end of the fourth resistor 800 is similarly connected to the negative terminal of the operational amplifier 200. The fourth resistor 800 should be connected in the same manner as the first RC circuit 500 and the fourth capacitor 700 to ensure circuit continuity and stability.

[0060] Due to the series connection of the first RC circuit 500, the fourth capacitor 700 and the fourth resistor 800, the input impedance of the operational amplifier 200 is optimized, which helps to remove high-frequency noise and interference in the signal, improve the clarity of the signal, and enhance the stability of the circuit.

[0061] The present application also provides a speaker detection device for a digital intelligent fire fighting system, comprising a shell having a receiving cavity formed therein, and a speaker detection circuit of any of the above-mentioned digital intelligent fire fighting systems, which is arranged in the shell.

[0062] The present application also provides a speaker detection system for a digital intelligent fire fighting system, and the speaker detection system for the digital intelligent fire fighting system includes the above-mentioned speaker detection device for the digital intelligent fire fighting system.

[0063] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present application.

Claims

1. A speaker detection circuit for a digital intelligent fire fighting system, wherein the speaker detection circuit is connected to a speaker, a host, and an MCU, respectively, and is characterized in that: The speaker detection circuit of the digital intelligent fire protection system includes: a first inductor, an operational amplifier, a first RC circuit, a second RC circuit and a detection input circuit, wherein the first inductor, the first RC circuit and the positive terminal of the operational amplifier are connected in sequence, the second RC circuit is respectively connected to the negative terminal and the output terminal of the operational amplifier, and the output terminal of the operational amplifier is connected to the detection input circuit; wherein the first inductor is used to obtain the induced current during the transmission process of the signal emitted by the host.

2. The speaker detection circuit of a digital intelligent fire protection system according to claim 1, characterized in that: The first RC circuit includes a first resistor and a first capacitor, one end of the first resistor is connected to one end of the first inductor and one end of the first capacitor respectively, and the other end of the first resistor and the other end of the first capacitor are both connected to electricity.

3. The speaker detection circuit of a digital intelligent fire protection system according to claim 2, characterized in that: The first RC circuit includes two third resistors, one end of each of the third resistors is connected to the first capacitor, the other end of one of the third resistors is connected to the positive terminal of the operational amplifier, and the other end of the other third resistor is connected to the positive terminal of the operational amplifier.

4. The speaker detection circuit of a digital intelligent fire protection system according to claim 3, characterized in that: The speaker detection circuit of the digital intelligent fire protection system includes a voltage-stabilizing diode, which is respectively connected to the positive terminal and the negative terminal of the operational amplifier.

5. The speaker detection circuit of a digital intelligent fire protection system according to claim 4, characterized in that: There are two voltage stabilizing diodes, and the two voltage stabilizing diodes are arranged in opposite directions.

6. The speaker detection circuit of a digital intelligent fire protection system according to claim 1, characterized in that: The second RC circuit includes a second resistor and a second capacitor, one end of the second resistor and one end of the second capacitor are both connected to the negative terminal of the operational amplifier, and the other end of the second resistor and the other end of the second capacitor are both connected to the output terminal of the operational amplifier.

7. The speaker detection circuit of a digital intelligent fire protection system according to claim 1, characterized in that: The speaker detection circuit of the digital intelligent fire protection system includes a third capacitor, and two ends of the third capacitor are respectively connected to the output end of the operational amplifier and the detection input circuit.

8. The speaker detection circuit of a digital intelligent fire protection system according to claim 1, characterized in that: The speaker detection circuit of the digital intelligent fire protection system includes a fourth capacitor and a fourth resistor, and the first RC circuit, the fourth capacitor, the fourth resistor and the negative terminal of the operational amplifier are connected in sequence.

9. A speaker detection device for a digital intelligent fire protection system, characterized in that: A shell having an accommodating cavity formed therein, and the speaker detection circuit of the digital intelligent fire fighting system according to any one of claims 1 to 8 are arranged in the shell.

10. A speaker detection system for a digital intelligent fire fighting system, characterized in that: The speaker detection system of the digital intelligent fire fighting system includes the speaker detection device of the digital intelligent fire fighting system according to claim 9.

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