Bluetooth voice alarm circuit

Abstract

The utility model aims to provide a Bluetooth voice alarm circuit, which is used for connecting fault signals and comprises a main control module and a power amplification module, the main control module comprises a main control chip, a signal interference filtering unit, a power supply interference filtering unit and a Bluetooth oscillation unit, one end of the signal interference filtering unit is used for connecting the fault signals, and the other end of the signal interference filtering unit is used for connecting the power amplification module. The other end of the signal interference filtering unit is electrically connected with the main control chip, the power interference filtering unit is electrically connected with the main control chip, the Bluetooth oscillation unit is electrically connected with the main control chip, and the power amplification module is electrically connected with the main control chip. Therefore, compared with an existing mode of using a buzzer to give an alarm, the fault signal can be broadcasted in a voice form under the action of the main control module and the power amplification module.

Description

Technical Field

[0001] The utility model relates to the technical field of inverters, in particular to a Bluetooth voice alarm circuit. Background Art

[0002] An inverter is a device that converts direct current into alternating current.

[0003] In order to improve the safety of inverter use, when the inverter has overheating, overvoltage, overcurrent and other faults, it is necessary to send out a fault signal in time. At present, the fault signal of the inverter is mainly broadcasted by a buzzer. However, relying only on a single buzzer, the user cannot screen out the cause of the fault in the first time, and the user needs to spend a lot of time to screen. Therefore, in order to solve the above problems, a Bluetooth voice alarm circuit of the present application is proposed. Utility Model Content

[0004] The utility model aims to overcome the deficiencies in the prior art and provide a Bluetooth voice alarm circuit which can perform voice broadcasting according to a fault signal, thereby reducing the time for users to troubleshoot the fault.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A Bluetooth voice alarm circuit, used for connecting a fault signal, comprising:

[0007] A main control module, the main control module comprising a main control chip, a signal interference filter unit, a power interference filter unit and a Bluetooth oscillator unit, one end of the signal interference filter unit is used to access the fault signal, the other end of the signal interference filter unit is electrically connected to the main control chip, the power interference filter unit is electrically connected to the main control chip, and the Bluetooth oscillator unit is electrically connected to the main control chip; and

[0008] A power amplifier module, wherein the power amplifier module is electrically connected to the main control chip.

[0009] Optionally, the signal interference filtering unit includes a resistor R22, a resistor R23, a capacitor C20, and a capacitor C56, one end of the resistor R23 is electrically connected to the main control chip, and the other end of the resistor R23 is used to access the fault signal, one end of the resistor R22 and one end of the capacitor C20 are both electrically connected to an end of the resistor R22 close to the main control chip, one end of the capacitor C56 is electrically connected to an end of the resistor R23 close to the fault signal, and the other end of the resistor R22, the other end of the capacitor C20, and the other end of the capacitor C56 are all connected to the digital ground.

[0010] Optionally, the power supply interference filtering unit includes an inductor L2, a diode D13, a capacitor C2, and a capacitor C49, the cathode of the diode D13 is electrically connected to the main control chip, the anode of the diode D13 is electrically connected to one end of the inductor L2, the other end of the inductor L2 is externally connected to a 5V power supply, one end of the capacitor C2 and one end of the capacitor C49 are electrically connected to the cathode of the diode D13, and the other end of the capacitor C2 and the other end of the capacitor C49 are connected to the digital ground.

[0011] Optionally, the Bluetooth oscillation unit includes an oscillator Y2, a capacitor C52, and a capacitor C53. The oscillator Y2 is electrically connected to the main control chip, one end of the capacitor C52 and one end of the capacitor C53 are electrically connected to the oscillator Y2, and the other end of the capacitor C52 and the other end of the capacitor C53 are connected to the digital ground.

[0012] Optionally, the power amplifier module includes a power amplifier chip and a filter unit, and the filter unit is electrically connected to the power amplifier chip and the main control chip respectively.

[0013] Optionally, the filtering unit includes a capacitor C15 and a resistor R11, the capacitor C15 is electrically connected to the resistor R11 and the main control chip respectively, and the end of the resistor R11 away from the capacitor C15 is electrically connected to the power amplifier chip.

[0014] Optionally, the power amplifier module further includes a speaker, and the speaker is electrically connected to the power amplifier chip.

[0015] Optionally, the power amplifier module further includes a mode selection unit, one end of the mode selection unit is electrically connected to the power amplifier chip, and the other end of the mode selection unit is externally connected to a 5V power supply.

[0016] Optionally, the main control module also includes a single-point grounding unit, which includes a capacitor C54 and a resistor R25, one end of the capacitor C54 is electrically connected to the main control chip, and the other end of the capacitor C54 is connected to the analog ground, one end of the resistor R25 is electrically connected to the analog ground, and the other end of the resistor R25 is electrically connected to the main control chip and the digital ground.

[0017] Compared with the prior art, the utility model has at least the following advantages:

[0018] The utility model of the Bluetooth voice alarm circuit is used to connect the fault signal, including a main control module and a power amplifier module, the main control module includes a main control chip, a signal interference filter unit, a power filter interference unit and a Bluetooth oscillator unit, one end of the signal interference filter unit is used to access the fault signal, the other end of the signal interference filter unit is electrically connected to the main control chip, the power filter interference unit is electrically connected to the main control chip, the Bluetooth oscillator unit is electrically connected to the main control chip, and the power amplifier module is electrically connected to the main control chip. In this way, compared with the existing method of using a buzzer for alarm, the fault signal can be broadcast in the form of voice through the function of the main control module and the power amplifier module, thereby speeding up the inverter fault troubleshooting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a functional module diagram of a Bluetooth voice alarm circuit according to one embodiment of the present utility model;

[0021] Figure 2 The present invention is a circuit diagram of a Bluetooth voice alarm circuit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings show preferred embodiments of the present invention.

[0023] like Figure 1 and Figure 2 As shown, a Bluetooth voice alarm circuit 10 is used to connect a fault signal, including a main control module 100 and a power amplifier module 200. It should be noted that the fault signal is a PWM wave, and different duty cycles represent different faults. The main control module 100 is used to be electrically connected to the fault signal and the power amplifier module 200 respectively, so that the fault signal is transmitted to the main control module 100, and the main control module 100 then transmits the fault signal to the power amplifier module 200, so that the power amplifier module 200 sends the fault signal through a speaker in the form of a voice broadcast. In this way, compared with the existing method of using a buzzer for alarm, the user can be directly informed of the fault type, thereby speeding up the inverter fault troubleshooting process.

[0024] like Figure 2As shown, the main control module 100 includes a main control chip U8, a signal interference filter unit, a power interference filter unit and a Bluetooth oscillator unit. One end of the signal interference filter unit is connected to the fault signal, and the other end of the signal interference filter unit is electrically connected to the main control chip U8. The power interference filter unit is electrically connected to the main control chip U8, the Bluetooth oscillator unit is electrically connected to the main control chip U8, and the power amplifier module 200 is electrically connected to the main control chip U8.

[0025] It should be noted that the main control chip U8 can use a chip with model number IC-AC6969D-SOP-16. This application only protects the connection position and connection relationship between the main control chip U8 and the signal interference filtering unit, the power interference filtering unit and the Bluetooth oscillation unit, as well as the connection position and connection relationship between the power amplifier module 200 and the main control chip U8, and does not require protection of the structure of the main control chip U8 itself. Further, the signal interference filtering unit is used to filter the fault signal. Further, the power interference filtering unit is used to filter out interference from the power supply that supplies power to the main control chip U8, ensuring that the power supply to the main control chip 100 is stable. Further, the Bluetooth oscillation unit is used to provide a stable Bluetooth oscillation signal to the main control chip U8. In this way, the fault signal enters the main control chip U8 through the signal interference filtering unit, and is finally converted into a voice broadcast of the speaker through the power amplifier module 200.

[0026] like Figure 2 As shown, in one embodiment, the signal interference filtering unit includes a resistor R22, a resistor R23, a capacitor C20, and a capacitor C56, one end of the resistor R23 is electrically connected to the main control chip, and the other end of the resistor R23 is used to access the fault signal, one end of the resistor R22 and one end of the capacitor C20 are both electrically connected to one end of the resistor R22 close to the main control chip, one end of the capacitor C56 is electrically connected to one end of the resistor R23 close to the fault signal, and the other end of the resistor R22, the other end of the capacitor C20, and the other end of the capacitor C56 are all connected to the digital ground.

[0027] Specifically, the resistor R23 is electrically connected to the ADC11 / SD0CMD / PC4 pin of the main control chip U8, and the end of the resistor R23 connected to the fault signal is also electrically connected to the BT_OSCI pin of the main control chip U8. In this way, the interference signal in the fault signal can be filtered out.

[0028] like Figure 2 As shown, in one embodiment, the power supply interference filtering unit includes an inductor L2, a diode D13, a capacitor C2, and a capacitor C49. The cathode of the diode D13 is electrically connected to the main control chip U8, the anode of the diode D13 is electrically connected to one end of the inductor L2, the other end of the inductor L2 is externally connected to a 5V power supply, one end of the capacitor C2 and one end of the capacitor C49 are electrically connected to the cathode of the diode D13, and the other end of the capacitor C2 and the other end of the capacitor C49 are connected to the digital ground.

[0029] Specifically, the cathode of the diode D13 is electrically connected to the VBAT pin of the main control chip U8, and further, the capacitor C2 is an electrolytic capacitor. In this way, interference to the power supply of the main control chip U8 can be filtered out to ensure stable power supply.

[0030] like Figure 2 As shown, in one embodiment, the power filter interference unit further includes a capacitor C50, one end of the capacitor C50 is electrically connected to the VDDIO pin of the main control chip U8, and the other end of the capacitor C50 is connected to the digital ground.

[0031] like Figure 1 As shown, in one embodiment, the Bluetooth oscillation unit includes an oscillator Y2, a capacitor C52, and a capacitor C53. The oscillator Y2 is electrically connected to the main control chip, one end of the capacitor C52 and one end of the capacitor C53 are both electrically connected to the oscillator Y2, and the other end of the capacitor C52 and the other end of the capacitor C53 are both connected to the digital ground.

[0032] Specifically, the oscillator Y2 has four pins, two of which are used for frequency input and output, respectively defined as pin 1 and pin 2, and the other two pins are suspended structures, respectively defined as pin 3 and pin 4. Pin 1 and pin 2 are used to be electrically connected to the BT_OSCI pin and BT_OSCO pin of the main control chip U8, respectively, and pin 1 and pin 2 are electrically connected to capacitor C52 and capacitor C53, respectively. Pin 3 and pin 4 are both connected to digital ground.

[0033] like Figure 2 As shown, in one embodiment, the power amplifier module 200 includes a power amplifier chip U5 and a filter unit, and the filter unit is electrically connected to the power amplifier chip U5 and the main control chip U8 respectively.

[0034] It should be noted that the power amplifier chip U5 may be a chip of model MIX2039. The filter unit is used to connect the main control chip U8 and the power amplifier chip U5 respectively, and can filter out interference of the control signal sent by the main control chip U8.

[0035] like Figure 2 As shown, in one embodiment, the filter unit includes a capacitor C15 and a resistor R11, the capacitor C15 is electrically connected to the resistor R11 and the main control chip respectively, and the end of the resistor R11 away from the capacitor C15 is electrically connected to the power amplifier chip. In this way, the capacitor C15 and the resistor R11 form a high-pass filter. Among them, the end of the capacitor C15 away from the resistor R11 is electrically connected to the DACL pin of the main control chip, and the end of the resistor R11 away from the resistor C15 is electrically connected to the -IN pin of the power amplifier chip U5.

[0036] like Figure 2As shown, in one embodiment, the power amplifier module 200 further includes a speaker, which is electrically connected to the power amplifier chip U5. Specifically, the speaker is electrically connected to the OUTP pin and the OUTN pin of the power amplifier chip U5 respectively.

[0037] like Figure 2 As shown, in one embodiment, the power amplifier module 200 further includes a mode selection unit, one end of the mode selection unit is electrically connected to the power amplifier chip U5, and the other end of the mode selection unit is externally connected to a 5V power supply. In one embodiment, the mode selection unit includes a resistor R13, one end of the resistor R13 is electrically connected to the MODE pin of the power amplifier chip U5, and the other end of the resistor R13 is externally connected to a 5V power supply.

[0038] like Figure 2 As shown, in one embodiment, the main control module 100 also includes a single-point grounding unit, which includes a capacitor C54 and a resistor R25. One end of the capacitor C54 is electrically connected to the main control chip, and the other end of the capacitor C54 is connected to the analog ground. One end of the resistor R25 is electrically connected to the analog ground, and the other end of the resistor R25 is electrically connected to the main control chip and the digital ground.

[0039] It should be noted that one end of capacitor C54 is electrically connected to the VCOM pin of main control chip U8, and one end of resistor R25 is electrically connected to the VSSIO pin of main control chip U8. In this way, the digital ground and analog ground are connected at a single point, which can enhance the anti-interference ability.

[0040] Furthermore, if Figure 2 As shown, in one embodiment, the ADC3 / PA4 / USBDP pin and the ADC14 / SD0DAT / PC3 / USBDM pin of the main control chip U8 are both externally connected to pin headers.

[0041] Furthermore, if Figure 2 As shown, in one embodiment, the VDD pin of the power amplifier chip U5 is externally connected to a 5V power supply, and the VDD pin of the power amplifier chip U5 is also connected to a digital ground via a series capacitor C19. The SD pin of the power amplifier chip U5 is connected to a digital ground via a series resistor R19. The BYPASS pin of the power amplifier chip U5 is connected to an analog ground via a series capacitor C17.

[0042] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A Bluetooth voice alarm circuit for connecting a fault signal, characterized in that: include: A main control module, the main control module includes a main control chip, a signal interference filter unit, a power interference filter unit and a Bluetooth oscillator unit, one end of the signal interference filter unit is used to access the fault signal, the other end of the signal interference filter unit is electrically connected to the main control chip, the power interference filter unit is electrically connected to the main control chip, and the Bluetooth oscillator unit is electrically connected to the main control chip; and A power amplifier module, wherein the power amplifier module is electrically connected to the main control chip.

2. The Bluetooth voice alarm circuit according to claim 1, characterized in that: The signal interference filtering unit includes a resistor R22, a resistor R23, a capacitor C20, and a capacitor C56. One end of the resistor R23 is electrically connected to the main control chip, and the other end of the resistor R23 is used to access the fault signal. One end of the resistor R22 and one end of the capacitor C20 are both electrically connected to one end of the resistor R22 close to the main control chip, one end of the capacitor C56 is electrically connected to one end of the resistor R23 close to the fault signal, and the other end of the resistor R22, the other end of the capacitor C20, and the other end of the capacitor C56 are all connected to the digital ground.

3. The Bluetooth voice alarm circuit according to claim 1, characterized in that: The power supply interference filtering unit includes an inductor L2, a diode D13, a capacitor C2, and a capacitor C49. The cathode of the diode D13 is electrically connected to the main control chip, the anode of the diode D13 is electrically connected to one end of the inductor L2, the other end of the inductor L2 is externally connected to a 5V power supply, one end of the capacitor C2 and one end of the capacitor C49 are electrically connected to the cathode of the diode D13, and the other end of the capacitor C2 and the other end of the capacitor C49 are connected to the digital ground.

4. The Bluetooth voice alarm circuit according to claim 1, characterized in that: The Bluetooth oscillation unit includes an oscillator Y2, a capacitor C52, and a capacitor C53. The oscillator Y2 is electrically connected to the main control chip, one end of the capacitor C52 and one end of the capacitor C53 are both electrically connected to the oscillator Y2, and the other end of the capacitor C52 and the other end of the capacitor C53 are both connected to the digital ground.

5. The Bluetooth voice alarm circuit according to claim 1, characterized in that: The power amplifier module includes a power amplifier chip and a filter unit, and the filter unit is electrically connected to the power amplifier chip and the main control chip respectively.

6. The Bluetooth voice alarm circuit according to claim 5, characterized in that: The filtering unit includes a capacitor C15 and a resistor R11. The capacitor C15 is electrically connected to the resistor R11 and the main control chip respectively, and the end of the resistor R11 away from the capacitor C15 is electrically connected to the power amplifier chip.

7. The Bluetooth voice alarm circuit according to claim 5, characterized in that: The power amplifier module also includes a speaker, and the speaker is electrically connected to the power amplifier chip.

8. The Bluetooth voice alarm circuit according to claim 5, characterized in that: The power amplifier module further comprises a mode selection unit, one end of which is electrically connected to the power amplifier chip, and the other end of which is externally connected to a 5V power supply.

9. The Bluetooth voice alarm circuit according to claim 1, characterized in that: The main control module also includes a single-point grounding unit, which includes a capacitor C54 and a resistor R25. One end of the capacitor C54 is electrically connected to the main control chip, and the other end of the capacitor C54 is connected to the analog ground. One end of the resistor R25 is electrically connected to the analog ground, and the other end of the resistor R25 is electrically connected to the main control chip and the digital ground.

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