D-type voice power amplifier circuit for sky rail system

Abstract

The invention relates to a D-type voice power amplifier circuit for a sky rail system, which comprises a sky rail, the sky rail comprises a rail, a sliding block and a traction module, the sliding block is in sliding connection with the rail, the sliding block is fixed with the traction module, the sliding block is provided with a driving system, the driving system comprises a rail wheel, a driving motor, a driving chip and a controller, and the controller is connected with the D-type voice power amplifier circuit. The D-class voice power amplifier circuit comprises a power module, a voice recognition module, a pre-stage signal processing module and a D-class amplifier, the voice recognition module is in communication connection with the controller, the output end of the voice recognition module is connected with the pre-stage signal processing module and the D-class amplifier, the output end of the pre-stage signal processing module is connected with the input end of the D-class amplifier, and the output end of the D-class amplifier is connected with the output end of the controller. The output end of the D-type amplifier is connected with a loudspeaker, and the voice recognition module is in communication connection with a memory module.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a class D voice amplifier circuit for a ceiling rail system. Background Art

[0002] The ceiling rail gait transfer machine is used to help patients with limited mobility to move independently, including a ceiling rail set on the ceiling, a slider set inside the ceiling rail, the slider is slidably connected to the ceiling rail, and the slider is provided with a drive system, the drive system includes a track wheel, a drive motor, a drive chip and a controller, the output shaft of the drive motor is connected to the track wheel through a transmission, the drive motor is connected to a power supply through a drive chip, and the input end of the drive chip is connected to the output end of the controller. When working, the drive motor drives the track wheel to rotate and then the slider moves along the ceiling rail. The slider is provided with a traction module, and the patient is in a suspended state through the traction module. The patient's weight is partially or completely reduced by suspension, and the slider assists in driving the patient to move, reducing the force required for the patient to move.

[0003] The existing slider movement is controlled by a controller, which has a low level of intelligence and is complex to operate. In order to achieve a better human-computer interaction effect, a voice control system is introduced to guide patients through voice to correctly use the ceiling rail gait transfer machine, such as how to safely transfer the body, when to start and stop training, etc. The existing voice control system cannot be directly applied to the ceiling rail equipment, and the existing voice control system has the following problems: 1. The noisy medical environment results in low voice output clarity; 2. High energy consumption often shortens the operation time of the drive motor; For this reason, a voice power amplifier circuit is urgently needed. Summary of the invention

[0004] In order to solve the problem that the existing voice control system cannot be applied to the overhead rail system, the present invention proposes a class D voice power amplifier circuit for the overhead rail system, which is provided with a voice recognition module, a pre-stage signal processing module and a class D amplifier, provides high-quality audio output, is easy to integrate and effectively reduces electromagnetic interference.

[0005] In order to achieve the above-mentioned purpose, the present invention proposes a class D voice power amplifier circuit for an overhead rail system, comprising an overhead rail, the overhead rail comprising a track, a slider and a traction module, the slider being arranged in the track, the slider being slidably connected to the track, the slider being fixed to the traction module, the slider being provided with a driving system, the driving system comprising a track wheel, a driving motor, a driving chip and a controller, the output shaft of the driving motor being transmission-connected to the track wheel, the driving motor being connected to a power supply through the driving chip, the input end of the driving chip being connected to the output end of the controller, the controller being connected to a class D voice power amplifier circuit, the class D voice power amplifier circuit comprising a power supply module, a voice recognition module, a pre-stage signal processing module and a class D amplifier, the voice recognition module being communicatively connected to the controller, the output end of the voice recognition module being connected to the pre-stage signal processing module and the class D amplifier, the output end of the pre-stage signal processing module being connected to the input end of the class D amplifier, the output end of the class D amplifier being connected to a speaker, and the voice recognition module being communicatively connected to a memory module.

[0006] Furthermore, the pre-stage signal processing module includes a NE5532 chip, the NE5532 chip includes a first amplifier and a second amplifier, and the first amplifier and the second amplifier are both provided with an active filter circuit, a protection circuit and a negative feedback circuit; The in-phase end of the first amplifier is connected to the output end of the speech recognition module via the active filter circuit, the output end of the first amplifier is connected to the class D amplifier, the protection circuit is connected to the in-phase end of the first amplifier, one end of the negative feedback circuit is connected to the inverting end of the first amplifier, and the other end is connected to the output end of the first amplifier; The in-phase end of the second amplifier is connected to the output end of the speech recognition module via the active filter circuit, the output end of the second amplifier is connected to the Class D amplifier, the protection circuit is connected to the in-phase end of the second amplifier, one end of the negative feedback circuit is connected to the inverting end of the second amplifier, and the other end is connected to the output end of the second amplifier.

[0007] The pre-stage signal processing module is used to achieve signal buffering and pre-amplification, improve the fidelity and stability of the signal through the negative feedback circuit, compare the difference between the input signal and the feedback signal, adjust the duty cycle of the PWM signal to achieve more accurate signal amplification, filter out the high-frequency components in the PWM signal through the active filter circuit, restore the original analog signal, and protect the circuit to achieve overvoltage, overcurrent or overheating protection.

[0008] Furthermore, the class D amplifier includes a TPA3126D2 chip, an input end of the TPA3126D2 chip is connected to a pre-stage signal processing module, an output end is connected to a speaker protection circuit, and the TPA3126D2 chip is connected to the speaker through the speaker protection circuit.

[0009] The TPA3126D2 chip has high-efficiency amplification and can convert input audio signals into high-power output with high efficiency (80%~95%), which makes them more energy-efficient than traditional Class AB amplifiers. In addition, the TPA3126D2 chip has low idle current. In low-power state, the TPA3126D2 chip can dynamically reduce idle current, which means that power consumption is significantly reduced in the absence of audio or light load. The TPA3126D2 chip can achieve differential analog input, which can improve the signal's anti-interference ability, especially in noisy environments.

[0010] Furthermore, the speech recognition module includes a MY1690 chip.

[0011] The MY1690 chip integrates functions such as speech synthesis, audio decoding, and power amplifier circuits, and is small in size and easy to assemble.

[0012] Furthermore, the memory module includes an SD card storage module, the SD card storage module includes an SD card and an SD card slot, and the SD card slot is communicatively connected to the MY1690 chip via a SIDO interface.

[0013] There are multiple voice messages stored in the SD card.

[0014] Furthermore, the controller includes an MCU chip, and the MCU chip and the MY1690 chip improve the UART serial port communication connection.

[0015] The controller uses MCU chip with simple circuit structure, which is convenient for system integration.

[0016] Furthermore, the power module includes a rectifier and filter circuit, a charge and discharge management circuit and a battery. One end of the rectifier and filter circuit is connected to the 220V AC power supply, and the other end is connected to the charge and discharge management circuit. The output end of the charge and discharge management circuit is connected to the battery, and the battery supplies power for the drive motor, drive chip, controller and Class D voice amplifier circuit.

[0017] Furthermore, the driving motor is provided with an encoder, and an output end of the encoder is connected to an input end of the controller.

[0018] Set the encoder to detect the position of the slider.

[0019] Through the above technical solution, the beneficial effects of the present invention are: The class D voice amplifier circuit of the present invention can be combined with the overhead rail system to provide voice guidance on the use of the overhead rail. The present invention has high power amplifier efficiency, low energy consumption and low heat generation, which significantly extends the operating time of the device and reduces the charging frequency. Since the present invention does not require a large heat sink or fan due to the low heat generation, the system can be designed to be more compact, improving its portability and comfort. The class D voice amplifier circuit can provide high-quality audio output and ensure voice clarity even in noisy environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is one of the circuit diagrams of a Class D voice power amplifier circuit for a ceiling rail system of the present invention; Figure 2 The second circuit diagram of a Class D voice amplifier circuit for a ceiling rail system of the present invention; Figure 3 The third circuit diagram of a Class D voice amplifier circuit for a ceiling rail system of the present invention; Figure 4 The fourth circuit diagram of a Class D voice power amplifier circuit for a ceiling rail system of the present invention; Figure 5 The fifth circuit diagram of a Class D voice amplifier circuit for a ceiling rail system of the present invention; Figure 6 The sixth circuit diagram of a Class D voice amplifier circuit for a sky rail system of the present invention; Figure 7 This is the seventh circuit diagram of a Class D voice amplifier circuit for a ceiling rail system of the present invention.

[0021] Figure numbers: 1 is a driving motor, 2 is a driving chip, 3 is a controller, 4 is a voice recognition module, 5 is a Class D amplifier, 6 is a speaker, 7 is a memory module, 8 is a first amplifier, 9 is a second amplifier, 10 is an active filter circuit, 11 is a protection circuit, 12 is a negative feedback circuit, 13 is a speaker protection circuit, 14 is a rectifier filter circuit, 15 is a charge and discharge management circuit, 16 is a battery, and 17 is an encoder. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments: Example 1 like Figures 1 to 7As shown, a class D voice amplifier circuit for a ceiling rail system includes a ceiling rail, the ceiling rail includes a track, a slider and a traction module, the slider is arranged in the track, the slider is slidably connected to the track, the slider is fixed to the traction module, the slider is provided with a driving system, the driving system includes a track wheel, a driving motor 1, a driving chip 2 and a controller 3, the output shaft of the driving motor 1 is transmission-connected to the track wheel, the driving motor 1 is connected to a power supply through the driving chip 2, the input end of the driving chip 2 is connected to the output end of the controller 3, the controller 3 is connected to the class D voice amplifier circuit, the class D voice amplifier circuit includes a power module and a voice recognition module 4, the voice recognition module 4 is communicatively connected to the controller 3, the output end of the voice recognition module 4 is connected to a pre-stage signal processing module and a class D amplifier 5, the output end of the pre-stage signal processing module is connected to the input end of the class D amplifier 5, the output end of the class D amplifier 5 is connected to a speaker 6, and the voice recognition module 4 is communicatively connected to a memory module 7.

[0024] like Figure 6 As shown, the pre-stage signal processing module includes a NE5532 chip, and the NE5532 chip includes a first amplifier 8 and a second amplifier 9. The first amplifier 8 and the second amplifier 9 are both provided with an active filter circuit 10, a protection circuit 11 and a negative feedback circuit 12; The in-phase end of the first amplifier 8 is connected to the output end of the speech recognition module 4 via the active filter circuit 10, the output end of the first amplifier 8 is connected to the class D amplifier 5, the protection circuit 11 is connected to the in-phase end of the first amplifier 8, one end of the negative feedback circuit 12 is connected to the inverting end of the first amplifier 8, and the other end is connected to the output end of the first amplifier 8; The in-phase end of the second amplifier 9 is connected to the output end of the speech recognition module 4 via the active filter circuit 10, the output end of the second amplifier 9 is connected to the class D amplifier 5, the protection circuit 11 is connected to the in-phase end of the second amplifier 9, one end of the negative feedback circuit 12 is connected to the inverting end of the second amplifier 9, and the other end is connected to the output end of the second amplifier 9.

[0025] like Figure 7 As shown, the class D amplifier 5 includes a TPA3126D2 chip, the input end of the TPA3126D2 chip is connected to the pre-stage signal processing module, the output end is connected to the speaker protection circuit 13, and the TPA3126D2 chip is connected to the speaker 6 through the speaker protection circuit 13.

[0026] like Figure 4 and 5 As shown, the voice recognition module 4 includes a MY1690 chip.

[0027] The memory module 7 includes an SD card storage module, and the SD card storage module includes an SD card and an SD card slot. The SD card slot is communicatively connected to the MY1690 chip via a SIDO interface.

[0028] The controller 3 includes an MCU chip, and the MCU chip and the MY1690 chip improve the UART serial port communication connection.

[0029] In this embodiment, the MCU chip is an STM32 microcontroller, which is connected to the MY1690 chip via UART serial port communication. The RIN pin of the MY1690 chip is connected to the first amplifier 8, and the output end of the first amplifier 8 and the capacitor ground output are connected to the RIN+ and RIN- pins of the TPA3126D2 chip. The LIN pin of the MY1690 chip is connected to the second amplifier 9, and the output end of the second amplifier 9 and the capacitor ground output are connected to the LIN+ and LIN- pins of the TPA3126D2 chip.

[0030] Send initialization commands to MY1690 through the serial port to set parameters such as working mode, volume, and playback speed. like Figure 2 and 3 As shown, the power module includes a rectifier and filter circuit 14, a charge and discharge management circuit 15 and a battery 16. One end of the rectifier and filter circuit 14 is connected to the 220V AC power supply, and the other end is connected to the charge and discharge management circuit 15. The output end of the charge and discharge management circuit 15 is connected to the battery 16. The battery 16 supplies power to the drive motor 1, the drive chip 2, the controller 3 and the Class D voice amplifier circuit.

[0031] like Figure 1 As shown, the drive motor 1 is provided with an encoder 17, and the output end of the encoder 17 is connected to the input end of the controller 3. During operation, the MCU chip sends serial commands to the MY1690 chip, including start playing, stop playing, select playback files, etc. When the MY1690 chip receives the playback command, it locates the corresponding audio file in the SD card according to the file ID in the command, reads the audio file, decodes it, and converts the compressed digital audio signal into an analog audio signal. The decoded analog audio signal is filtered and amplified by the NE5532 chip, and then driven by the TPA3126D2 chip to make a sound. The patient makes corresponding actions through voice instructions.

[0032] In this embodiment, the driving chip 2 is an L289N chip, and the MCU chip controls the start, stop and reversal of the driving motor 1 through the L289N chip.

[0033] The encoder 17 is connected to the ADC pin of the MCU chip. The encoder 17 detects the rotation angle of the drive motor 1, and then obtains the travel of the track wheel. Therefore, the MCU chip controls the number of rotations of the drive motor 1 according to the program, and then controls the travel of the track wheel, so that the slider is in the set position. During the entire playback process, the MCU can send pause, continue, stop and other commands through the serial port to control the playback progress, so the voice content will change according to the travel. After the playback is completed, MY1690 waits for new commands, or enters low power mode according to the settings until the next trigger.

[0034] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A Class D voice amplifier circuit for a ceiling rail system, comprising a ceiling rail, the ceiling rail comprising a track, a slider and a traction module, the slider being arranged in the track, the slider being slidably connected to the track, the slider being fixed to the traction module, the slider being provided with a drive system, the drive system comprising a track wheel, a drive motor (1), a drive chip (2) and a controller (3), the output shaft of the drive motor (1) being transmission-connected to the track wheel, the drive motor (1) being connected to a power supply via the drive chip (2), the input end of the drive chip (2) being connected to the output end of the controller (3), characterized in that: The controller (3) is connected to a class D voice power amplifier circuit, the class D voice power amplifier circuit comprises a power module and a voice recognition module (4), the voice recognition module (4) is communicatively connected to the controller (3), the output end of the voice recognition module (4) is connected to a pre-stage signal processing module and a class D amplifier (5), the output end of the pre-stage signal processing module is connected to an input end of the class D amplifier (5), the output end of the class D amplifier (5) is connected to a speaker (6), and the voice recognition module (4) is communicatively connected to a memory module (7).

2. The class D voice amplifier circuit for a ceiling rail system according to claim 1, characterized in that: The pre-stage signal processing module comprises a NE5532 chip, the NE5532 chip comprises a first amplifier (8) and a second amplifier (9), the first amplifier (8) and the second amplifier (9) are both provided with an active filter circuit (10), a protection circuit (11) and a negative feedback circuit (12); The in-phase end of the first amplifier (8) is connected to the output end of the speech recognition module (4) via the active filter circuit (10), the output end of the first amplifier (8) is connected to the class D amplifier (5), the protection circuit (11) is connected to the in-phase end of the first amplifier (8), one end of the negative feedback circuit (12) is connected to the inverting end of the first amplifier (8), and the other end is connected to the output end of the first amplifier (8); The in-phase end of the second amplifier (9) is connected to the output end of the speech recognition module (4) via the active filter circuit (10), the output end of the second amplifier (9) is connected to the class D amplifier (5), the protection circuit (11) is connected to the in-phase end of the second amplifier (9), one end of the negative feedback circuit (12) is connected to the inverting end of the second amplifier (9), and the other end is connected to the output end of the second amplifier (9).

3. The class D voice amplifier circuit for a ceiling rail system according to claim 1, characterized in that: The class D amplifier (5) comprises a TPA3126D2 chip, the input end of the TPA3126D2 chip is connected to a pre-stage signal processing module, the output end is connected to a speaker protection circuit (13), and the TPA3126D2 chip is connected to the speaker (6) via the speaker protection circuit (13).

4. The class D voice amplifier circuit for a ceiling rail system according to claim 1, characterized in that: The speech recognition module (4) includes a MY1690 chip.

5. The class D voice amplifier circuit for a ceiling rail system according to claim 4, characterized in that: The memory module (7) comprises an SD card storage module, the SD card storage module comprises an SD card and an SD card slot, and the SD card slot is communicatively connected to the MY1690 chip via a SIDO interface.

6. The class D voice amplifier circuit for a ceiling rail system according to claim 4, characterized in that: The controller (3) comprises an MCU chip, and the MCU chip and the MY1690 chip are connected to a UART serial port communication.

7. The class D voice amplifier circuit for a ceiling rail system according to claim 1, characterized in that: The power module comprises a rectifier filter circuit (14), a charge and discharge management circuit (15) and a battery (16); one end of the rectifier filter circuit (14) is connected to a 220V mains power supply, and the other end is connected to the charge and discharge management circuit (15); the output end of the charge and discharge management circuit (15) is connected to the battery (16); and the battery (16) supplies power to the drive motor (1), the drive chip (2), the controller (3) and the class D voice amplifier circuit.

8. The class D voice amplifier circuit for a ceiling rail system according to claim 1, characterized in that: The drive motor (1) is provided with an encoder (17), and an output end of the encoder (17) is connected to an input end of the controller (3).

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