Multifunctional USB sound card

Abstract

The utility model relates to a kind of multi-functional USB sound card, including sound card motherboard, power module, transformer, power amplifier board, power socket, terminal connector and case, power module is connected with sound card motherboard, transformer is connected with power module, power amplifier board is connected with sound card motherboard, power amplifier board is connected with transformer, power socket is connected with transformer, terminal connector is connected with sound card motherboard, terminal connector is connected with power amplifier board, sound card motherboard includes low-noise amplifier circuit, IEPE sensor, analog-digital converter and input connector, multiple input connectors are connected with multiple low-noise amplifier circuits respectively, multiple low-noise amplifier circuits are connected with analog-digital converter, IEPE sensor is connected at the connecting point of input connector and low-noise amplifier circuit.The USB sound card of the utility model can collect alternating current, direct current signal based on the above structure, and can be set to the mode of IEPE sensor collection.

Description

Technical Field

[0001] This utility model relates to the field of acoustic technology, and in particular to a multifunctional USB sound card. Background Technology

[0002] A USB sound card is an external audio device that connects to a computer via a USB interface. It converts digital audio signals into high-fidelity analog signals, providing lower noise, higher resolution, and richer interfaces than onboard sound cards. It supports recording, playback, and various sound effects processing, and is plug-and-play, making it suitable for scenarios such as music production, live streaming, and gaming.

[0003] In related technologies, USB sound cards generally suffer from insufficient channel count: conventional products only provide 2 to 5 channels, or are mostly single-channel acquisition or single-channel output, making it difficult to simultaneously achieve multi-channel acquisition and multi-channel output. USB sound cards also have relatively limited functionality, typically only offering standard audio acquisition and audio output capabilities. Furthermore, their standard audio acquisition function is incompatible with various types of sensor acquisition. Utility Model Content

[0004] This utility model provides a multi-functional USB sound card, which aims to solve at least one of the technical problems existing in the prior art.

[0005] The technical solution of this utility model is a multi-functional USB sound card, comprising: Sound card motherboard; The power module is connected to the sound card motherboard; A transformer, which is connected to the power module; A power amplifier board, which is connected to the sound card motherboard and the transformer; A power socket, which is connected to the transformer; Terminal connectors, which are connected to the sound card motherboard and the power amplifier board; The sound card motherboard, the power module, the transformer, the power amplifier board, the power socket, and the terminal connector are disposed inside the chassis. The sound card motherboard includes a low-noise amplifier circuit, an IEPE sensor, an analog-to-digital converter, and input connectors. Multiple input connectors are connected to multiple low-noise amplifier circuits, and multiple low-noise amplifier circuits are connected to the analog-to-digital converter. The IEPE sensor is connected to the connection point between the input connectors and the low-noise amplifier circuits.

[0006] According to some embodiments of this utility model, the sound card motherboard includes a USB connector, a USB hub, a USB sound card driver chip, a USB-to-serial adapter, and an FPGA programmable controller. The USB connector is connected to the USB hub, the USB sound card driver chip is connected to the USB hub, the USB to serial port is connected to the USB hub, the FPGA programmable controller is connected to the USB sound card driver chip, and the FPGA programmable controller is connected to the USB to serial port.

[0007] According to some embodiments of this utility model, the sound card motherboard includes a digital-to-analog converter, a signal amplification circuit, and an output connector. Multiple digital-to-analog converters are connected to the FPGA programmable controller, multiple analog-to-digital converters are connected to the FPGA programmable controller, multiple output connectors are connected to the signal amplification circuit, and multiple signal amplification circuits are respectively connected to multiple digital-to-analog converters.

[0008] According to some embodiments of this utility model, the signal amplification circuit includes a third operational amplifier, a fifth-first-second resistor, a fifth-fourth fuse, a fifth-first diode, a fifth-third capacitor, a fifth-fourth capacitor, a fifth-fifth capacitor, a fifth-sixth capacitor, a fifth-seventh resistor, a fifth-eighth resistor, a fifth-ninth resistor, a fifth-zero resistor, and a fifth-first-first resistor. One end of resistor 512 is connected to the inverting input of the third operational amplifier, and the other end of resistor 512 is connected to the output of the third operational amplifier. The output of the third operational amplifier is connected to fuse 54. One end of diode 51 is connected to the connection point between the output of the third operational amplifier and fuse 54, and the other end of diode 51 is grounded. Capacitor 56 is connected in parallel with resistor 512. Resistor 59 is connected to the connection point between resistor 512 and the inverting input of the third operational amplifier. Resistor 59 is connected to resistor 57. Resistor 510 is connected to the non-inverting input of the third operational amplifier. One end of resistor 511 is connected to the connection point between resistor 510 and the non-inverting input of the third operational amplifier, and the other end of resistor 511 is grounded. Resistor 510 is connected to resistor 58. One end of the fifth third capacitor is connected to the connection point of the fifth ninth resistor and the fifth seventh resistor, and the other end of the fifth third capacitor is grounded. One end of the fifth fourth capacitor is connected to the connection point of the fifth eleventh resistor and the fifth eighth resistor, and the other end of the fifth fourth capacitor is grounded. One end of the fifth fifth capacitor is connected to the connection point of the fifth ninth resistor and the fifth seventh resistor, and the other end of the fifth fifth capacitor is connected to the connection point of the fifth eleventh resistor and the fifth eighth resistor. The fifth fourth fuse is connected to the output connector.

[0009] According to some embodiments of this utility model, the signal amplification circuit includes a fourth operational amplifier, a fifth capacitor, a fifth resistor, a fifth third resistor, a fifth fourth resistor, and a third power supply. The output terminal of the fourth operational amplifier is connected to the fifth-seventh resistor. The inverting input terminal of the fourth operational amplifier is connected to the fifth-first capacitor. The fifth-first capacitor is connected to the fifth-fourth resistor. The fifth-fourth resistor is connected to the connection point between the output terminal of the fourth operational amplifier and the fifth-seventh resistor. One end of the fifth-third resistor is connected to the connection point between the fifth-seventh resistor and the fifth-fourth resistor. The other end of the fifth-third resistor is connected to the connection point between the fifth-first capacitor and the inverting input terminal of the fourth operational amplifier. The non-inverting input terminal of the fourth operational amplifier is connected to the fifth-first resistor. The fifth-first resistor is connected to the third power supply. The digital-to-analog converter is connected to the connection point between the fifth-third resistor and the inverting input terminal of the fourth operational amplifier.

[0010] According to some embodiments of this utility model, the signal amplification circuit includes a fifth operational amplifier, a fifth second resistor, a fifth fifth resistor, a fifth sixth resistor, a fifth second capacitor, and a fourth power supply. The output terminal of the fifth operational amplifier is connected to the fifth-eighth resistor. The inverting input terminal of the fifth operational amplifier is connected to the fifth-second capacitor. The fifth-second capacitor is connected to the fifth-sixth resistor. The fifth-sixth resistor is connected to the connection point between the output terminal of the fifth operational amplifier and the fifth-eighth resistor. One end of the fifth-fifth resistor is connected to the connection point between the fifth-second capacitor and the inverting input terminal of the fifth operational amplifier. The other end of the fifth-fifth resistor is connected to the connection point between the fifth-sixth resistor and the fifth-eighth resistor. The non-inverting input terminal of the fifth operational amplifier is connected to the fifth-second resistor. The fifth-second resistor is connected to the fourth power supply. The digital-to-analog converter is connected to the connection point between the fifth-fifth resistor and the inverting input terminal of the fifth operational amplifier.

[0011] According to some embodiments of the present invention, the low-noise amplifier circuit includes a first-stage amplifier and a second-stage amplifier, the first-stage amplifier is connected to the second-stage amplifier, the first-stage amplifier is connected to the IEPE sensor, the first-stage amplifier is connected to the input connector, and the second-stage amplifier is connected to the analog-to-digital converter.

[0012] According to some embodiments of this utility model, the first-stage amplifier includes a third-first relay, a third-second relay, a third-third relay, a third-fifth capacitor, a third-sixth capacitor, a third-third fuse, a third-first diode, a first operational amplifier, a third-seventh resistor, a third-eighth resistor, and a third-ninth resistor. The third relay is connected in parallel with the third capacitor, the third capacitor is connected to the third fuse, the third relay is connected to the connection point of the third capacitor and the third fuse, one end of the third diode is connected to the connection point of the third capacitor and the third fuse, and the other end of the third diode is grounded, the non-inverting input of the first operational amplifier is connected to the third capacitor, one end of the third resistor is connected to the inverting input of the first operational amplifier, and the other end of the third resistor is connected to the output of the first operational amplifier, the third capacitor is connected in parallel with the third resistor, one end of the third resistor is connected to the connection point of the non-inverting input of the first operational amplifier and the third capacitor, and the other end of the third resistor is grounded, the third resistor is connected to the connection point of the third resistor and the inverting input of the first operational amplifier, one end of the third relay is connected to the third resistor, and the other end of the third relay is grounded, the third relay is connected to the IEPE sensor, and the third fuse is connected to the input connector.

[0013] According to some embodiments of this utility model, the second-stage amplifier includes a differential amplifier, a third-first resistor, a third-second resistor, a third-third resistor, a third-fourth resistor, a third-fifth resistor, a third-sixth resistor, a third-zero capacitor, a third-first capacitor, a third-second capacitor, a third-third capacitor, and a third-fourth capacitor. The positive input terminal of the differential amplifier is connected to the third-fifth resistor, which is connected to the output terminal of the first operational amplifier. One end of the third-third resistor is connected to the junction of the positive input terminal of the differential amplifier and the third-fifth resistor, while the other end is connected to the negative output terminal of the differential amplifier. The third-third capacitor is connected in parallel with the third-third resistor, and the junction of the third-third resistor and the negative output terminal of the differential amplifier is connected to the third-first resistor. One end of the third-sixth resistor is connected to the negative input terminal of the differential amplifier, while the other end is grounded. One end of the third-fourth resistor is connected to the junction of the third-sixth resistor and the negative input terminal of the differential amplifier, while the other end is connected to the positive output terminal of the differential amplifier. The third-fourth capacitor is connected in parallel with the third-fourth resistor, and the junction of the third-fourth resistor and the positive output terminal of the differential amplifier is connected to the third-second resistor. One end of the third zero capacitor is connected to the third first resistor, and the other end of the third zero capacitor is connected to the third second resistor. The third first capacitor is connected to the connection point of the third zero capacitor and the third first resistor. The third second capacitor is connected to the connection point of the third zero capacitor and the third second resistor. The third first capacitor is connected to the third second capacitor. The connection point of the third first capacitor and the third second capacitor is grounded. The connection point of the third zero capacitor and the third first resistor is connected to the analog-to-digital converter. The connection point of the third zero capacitor and the third second resistor is connected to the analog-to-digital converter.

[0014] According to some embodiments of the present invention, the sound card motherboard includes an IEPE current source circuit, and the IEPE sensor is connected to the IEPE current source circuit; The IEPE current source circuit includes a first power supply, a second power supply, a second operational amplifier, a fourth resistor, a fourth resistor, a fourth resistor, a fourth resistor, a fifth resistor, a fourth capacitor, and a transistor. The non-inverting input of the second operational amplifier is connected to the fourth and fifth resistors. The fourth and fifth resistors are connected to the second power supply. The output of the second operational amplifier is connected to the fourth and second resistors. The fourth and second resistors are connected to the first power supply. One end of the fourth and first capacitors is connected to the inverting input of the second operational amplifier. The other end of the fourth and first capacitors is connected to the output of the second operational amplifier. The fourth and first resistors are connected to the fourth and second resistors. The drain of the transistor is connected to the fourth and first resistors. The gate of the transistor is connected to the fourth and third resistors. The fourth and third resistors are connected to the output of the second operational amplifier. The source of the transistor is connected to the IEPE sensor. One end of the fourth and fourth resistors is connected to the connection point of the fourth and first capacitors and the inverting input of the second operational amplifier. The other end of the fourth and fourth resistors is connected to the connection point of the drain of the transistor and the fourth and first resistors.

[0015] The beneficial effects of this utility model include: the multi-functional USB sound card includes a sound card motherboard, a power module, a transformer, an amplifier board, a power socket, terminal connectors, and a chassis. The power module is connected to the sound card motherboard, the transformer is connected to the power module, the amplifier board is connected to the sound card motherboard, the amplifier board is connected to the transformer, the power socket is connected to the transformer, the terminal connectors are connected to the sound card motherboard, and the terminal connectors are connected to the amplifier board. The sound card motherboard, power module, transformer, amplifier board, power socket, and terminal connectors are located inside the chassis. The sound card motherboard includes a low-noise amplifier circuit, an IEPE sensor, an analog-to-digital converter, and input connectors. Multiple input connectors are connected to multiple low-noise amplifier circuits, multiple low-noise amplifier circuits are connected to the analog-to-digital converter, and the IEPE sensor is connected to the connection point between the input connectors and the low-noise amplifier circuits.

[0016] This utility model's USB sound card, based on the aforementioned structure, features high-precision acquisition and output capabilities. It can acquire AC and DC signals and can be configured for IEPE sensor acquisition. This utility model enables a single USB sound card device to sample multiple industrial sensors, eliminating the need for technicians to carry multiple testing instruments. This utility model integrates various data acquisition functions into a single USB sound card device, including sound acquisition, noise acquisition, acceleration sensor acquisition, vibration acquisition, and strain acquisition.

[0017] Furthermore, additional aspects and advantages of this invention will be set forth in part in the description which follows. Some of the beneficial effects of this invention will become apparent from the description which follows, or may be learned by practice of this invention. Attached Figure Description

[0018] Figure 1This is a structural schematic diagram of a multifunctional USB sound card according to an embodiment of this utility model.

[0019] Figure 2 This is a schematic diagram of the sound card motherboard in an embodiment of this utility model.

[0020] Figure 3 This is a circuit diagram of the low-noise amplifier circuit in an embodiment of this utility model.

[0021] Figure 4 This is a circuit diagram of the IEPE current source circuit in an embodiment of this utility model.

[0022] Figure 5 This is a circuit diagram of the signal amplification circuit in an embodiment of this utility model.

[0023] Figure 6 This is a schematic diagram of the host computer instructions in an embodiment of this utility model.

[0024] Figure 7 This is a detailed structural diagram of a multi-functional USB sound card according to an embodiment of the present invention.

[0025] The above figures include the following reference numerals: U53, Third Operational Amplifier; R512, Fifth-12 Resistor; U54, Fifth-4 Fuse; D51, Fifth-1 Diode; C53, Fifth-3 Capacitor; C54, Fifth-4 Capacitor; C55, Fifth-5 Capacitor; C56, Fifth-6 Capacitor; R57, Fifth-7 Resistor; R58, Fifth-8 Resistor; R59, Fifth-9 Resistor; R510, Fifth-1 Zero Resistor; R511, Fifth-11 Resistor; U51, Fourth Operational Amplifier; C51, Fifth-1 Capacitor; R51, Fifth-1 Resistor; R53, Fifth-3 Resistor; R54, Fifth-4 Resistor; U52, Fifth Operational Amplifier; R52, Fifth-2 Resistor; R55, Fifth-5 Resistor; R56, Fifth-6 Resistor; C52, Fifth-2 Capacitor; K31, Third-1 Relay; K32, Third-2 Relay; C35, Third-5 Capacitor; C36 U33, capacitor 36; U34, fuse 33; D35, diode 31; U36, operational amplifier 1; R37, resistor 37; R38, resistor 38; R39, resistor 39; U31, differential amplifier; R37, resistor 31; R38, resistor 38; R39, resistor 39; U31, differential amplifier; R38, resistor 39; R31, resistor 31; R38, resistor 39; R31, resistor 31; R38, resistor 39; R39, resistor 39; R31, resistor 30; C31, capacitor 31; C32, capacitor 31; C32, capacitor 31; C33, capacitor 31; C34, capacitor 31; U45, resistor 31; C46, ​​capacitor 31; U47, resistor 31; R38, resistor 31; R39, resistor 31; R30, resistor 31; C31, resistor 31; C32, resistor 31; C33, resistor 31; R44, resistor 31; R45, resistor 31; C46, ​​capacitor 31; U47, resistor 31; R38, resistor 31; R39, resistor 31; R30, resistor 31; R31, resistor 31; R32, resistor 31; R33, resistor 31; R3 ...35, resistor 31; R36, resistor 31; R37, resistor 31; R3

[0026] In the above figures, for the sake of clarity, the positions of circuit components are indicated by reference numerals and radii, which may obscure the actual outlines of the circuit components, but do not affect the representation. Detailed Implementation

[0027] The following will provide a clear and complete description of the concept, specific structure, and technical effects of this utility model in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of this utility model. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0028] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or it can be indirectly fixed or connected to the other feature. Furthermore, the descriptions of "upper," "lower," "left," "right," "top," and "bottom" used in this utility model are only relative to the relative positional relationships of the various components of this utility model in the accompanying drawings.

[0029] Furthermore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and not for limiting the scope of the invention. The term "and / or" as used herein includes any combination of one or more of the associated listed items.

[0030] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various elements, these elements should not be limited to these terms. These terms are only used to distinguish elements of the same type from one another. For example, without departing from the scope of this disclosure, a first element may also be referred to as a second element, and similarly, a second element may also be referred to as a first element.

[0031] Reference Figures 1 to 7 As shown, in some embodiments, a multi-functional USB sound card according to the present invention includes a sound card motherboard, a power module, a transformer, an amplifier board, a power socket, terminal connectors, and a chassis. The power module is connected to the sound card motherboard, the transformer is connected to the power module, the amplifier board is connected to the sound card motherboard, the amplifier board is connected to the transformer, the power socket is connected to the transformer, the terminal connectors are connected to the sound card motherboard, and the terminal connectors are connected to the amplifier board. The sound card motherboard, power module, transformer, amplifier board, power socket, and terminal connectors are disposed inside the chassis. The sound card motherboard includes a low-noise amplifier circuit, an IEPE sensor, an analog-to-digital converter, and input connectors. Multiple input connectors are respectively connected to multiple low-noise amplifier circuits, multiple low-noise amplifier circuits are connected to the analog-to-digital converter, and the IEPE sensor is connected to the connection point of the input connectors and the low-noise amplifier circuits.

[0032] It is understood that the USB sound card of this invention is a multi-functional, multi-channel detection device that combines audio acquisition, IEPE sensor acquisition, strain acquisition, and audio output. Based on the aforementioned structure, this USB sound card features high-precision acquisition and high-precision output capabilities, can acquire AC and DC signals, and can be configured for IEPE sensor acquisition, making it compatible with various types of sensors. This invention enables a single USB sound card device to sample multiple industrial sensors, eliminating the need for technicians to carry multiple testing instruments. This invention integrates multiple data acquisition functions into a single USB sound card device, including sound acquisition, noise acquisition, acceleration sensor acquisition, vibration acquisition, and strain acquisition.

[0033] Specifically, the amplifier board is a 10W amplifier board, and the transformer is a 200W transformer. The sound card motherboard includes low-noise amplifier circuitry, IEPE sensor circuitry, analog-to-digital converter circuitry, and input connectors. Terminal connectors refer to detachable electrical interfaces that "plug" or "plug" wires into the PCB / device. IEPE (Integrated Electronics Piezo-Electric) indicates the industrial accelerometer / microphone interface standard.

[0034] See Figure 2 In some embodiments, the sound card motherboard includes a USB connector, a USB hub, a USB sound card driver chip, a USB-to-serial adapter, and an FPGA programmable controller. The USB connector is connected to the USB hub, the USB sound card driver chip is connected to the USB hub, the USB-to-serial adapter is connected to the USB hub, the FPGA programmable controller is connected to the USB sound card driver chip, and the FPGA programmable controller is connected to the USB-to-serial adapter.

[0035] Specifically, the sound card motherboard includes a USB connector, a USB hub circuit, a USB sound card driver chip, a USB-to-serial port circuit, and an FPGA (Field-Programmable Gate Array) programmable controller circuit.

[0036] In some embodiments, the sound card motherboard includes a digital-to-analog converter, a signal amplification circuit, and an output connector. Multiple digital-to-analog converters are connected to an FPGA programmable controller, multiple analog-to-digital converters are connected to an FPGA programmable controller, multiple output connectors are connected to a signal amplification circuit, and multiple signal amplification circuits are respectively connected to multiple digital-to-analog converters.

[0037] See Figure 5In some embodiments, the signal amplification circuit includes a third operational amplifier U53, a fifth-first resistor R512, a fifth-fourth fuse U54, a fifth-first diode D51, a fifth-third capacitor C53, a fifth-fourth capacitor C54, a fifth-fifth capacitor C55, a fifth-sixth capacitor C56, a fifth-seventh resistor R57, a fifth-eighth resistor R58, a fifth-ninth resistor R59, a fifth-first zero-resistance resistor R510, and a fifth-first resistor R511. One end of the fifth-first resistor R512 is connected to the inverting input terminal of the third operational amplifier U53, and the other end of the fifth-first resistor R512 is connected to the output terminal of the third operational amplifier U53. The output terminal of the third operational amplifier U53 is connected to the fifth-fourth fuse U54, and one end of the fifth-first diode D51 is connected to the fifth-first resistor U53. The output of operational amplifier U53 is connected to the connection point of fuse U54. The other end of diode D51 is grounded. Capacitor C56 is connected in parallel with resistor R512. Resistor R59 is connected to the connection point of resistor R512 and the inverting input of operational amplifier U53. Resistor R59 is connected to resistor R57. Resistor R510 is connected to the non-inverting input of operational amplifier U53. One end of resistor R511 is connected to the connection point of resistor R510 and the non-inverting input of operational amplifier U53, and the other end of resistor R511 is grounded. Resistor R510 is connected to resistor R58. One end of capacitor C53 (fifth capacitor) is connected to the connection point of resistors R59 (fifth resistor) and R57 (fifth resistor), and the other end of capacitor C53 is grounded. One end of capacitor C54 (fifth capacitor) is connected to the connection point of resistors R510 (fifth resistor) and R58 (fifth resistor), and the other end of capacitor C54 is grounded. One end of capacitor C55 (fifth capacitor) is connected to the connection point of resistors R59 (fifth resistor) and R57 (fifth resistor), and the other end of capacitor C55 is connected to the connection point of resistors R510 (fifth resistor) and R58 (fifth resistor). Fuse U54 (fifth fuse) is connected to the output connector.

[0038] In some embodiments, the signal amplification circuit includes a fourth operational amplifier U51, a fifth capacitor C51, a fifth resistor R51, a fifth third resistor R53, a fifth fourth resistor R54, and a third power supply. The output terminal of the fourth operational amplifier U51 is connected to the fifth seventh resistor R57. The inverting input terminal of the fourth operational amplifier U51 is connected to the fifth capacitor C51. The fifth capacitor C51 is connected to the fifth fourth resistor R54. The fifth fourth resistor R54 is connected to the connection point between the output terminal of the fourth operational amplifier U51 and the fifth seventh resistor R57. One end of the fifth third resistor R53 is connected to the connection point between the fifth seventh resistor R57 and the fifth fourth resistor R54. The other end of the fifth third resistor R53 is connected to the connection point between the fifth capacitor C51 and the inverting input terminal of the fourth operational amplifier U51. The non-inverting input terminal of the fourth operational amplifier U51 is connected to the fifth resistor R51. The fifth first resistor R51 is connected to the third power supply. The digital-to-analog converter is connected to the connection point between the fifth third resistor R53 and the inverting input terminal of the fourth operational amplifier U51.

[0039] In some embodiments, the signal amplification circuit includes a fifth operational amplifier U52, a fifth second resistor R52, a fifth fifth resistor R55, a fifth sixth resistor R56, a fifth second capacitor C52, and a fourth power supply. The output terminal of the fifth operational amplifier U52 is connected to a fifth eighth resistor R58. The inverting input terminal of the fifth operational amplifier U52 is connected to a fifth second capacitor C52. The fifth second capacitor C52 is connected to a fifth sixth resistor R56. The fifth sixth resistor R56 is connected to the connection point between the output terminal of the fifth operational amplifier U52 and the fifth eighth resistor R58. One end of the fifth fifth resistor R55 is connected to the connection point between the fifth second capacitor C52 and the inverting input terminal of the fifth operational amplifier U52. The other end of the fifth fifth resistor R55 is connected to the connection point between the fifth sixth resistor R56 and the fifth eighth resistor R58. The non-inverting input terminal of the fifth operational amplifier U52 is connected to a fifth second resistor R52. The fifth second resistor R52 is connected to the fourth power supply. The digital-to-analog converter is connected to the connection point between the fifth fifth resistor R55 and the inverting input terminal of the fifth operational amplifier U52.

[0040] See Figure 5 OUTPUT SMB indicates the output connector. The fifth and fourth fuses, U54, are TBUs (Transient Units), and the fifth diode, D51, is a TVS (Transient Voltage Suppressor). The third operational amplifier, U53, the fourth operational amplifier, U51, and the fifth operational amplifier, U52, are all ADA4627s. The upper 1.65V power supply indicates the third power supply, and the lower 1.65V power supply indicates the fourth power supply. The third operational amplifier U53, the fourth operational amplifier U51, and the fifth operational amplifier U52 are all inverting amplifiers.

[0041] Specifically, the signal amplification circuit uses a 32-bit high-precision audio DAC, which is amplified by two stages of high-bandwidth, low-noise amplifiers before the signal output is sent to the power amplifier board.

[0042] See Figure 3 In some embodiments, the low-noise amplifier circuit includes a first-stage amplifier and a second-stage amplifier, the first-stage amplifier being connected to the second-stage amplifier, the first-stage amplifier being connected to an IEPE sensor, the first-stage amplifier being connected to an input connector, and the second-stage amplifier being connected to an analog-to-digital converter.

[0043] See Figure 3 In some embodiments, the first-stage amplifier includes a third relay K31, a third relay K32, a third relay K3, a third capacitor C35, a third capacitor C36, a third fuse U33, a third diode D31, a first operational amplifier U32, a third resistor R37, a third resistor R38, and a third resistor R39. The third relay K31 is connected in parallel with the third capacitor C36, and the third capacitor C36 is connected to the third fuse U33. The third relay K32 is connected to the junction of the third capacitor C36 and the third fuse U33. One end of the third diode D31 is connected to the junction of the third capacitor C36 and the third fuse U33, and the other end of the third diode D31 is grounded. The non-inverting input of the first operational amplifier U32... One end of the third resistor R37 is connected to the inverting input of the first operational amplifier U32, and the other end of the third resistor R37 is connected to the output of the first operational amplifier U32. The third capacitor C35 is connected in parallel with the third resistor R37. One end of the third resistor R39 is connected to the connection point between the non-inverting input of the first operational amplifier U32 and the third capacitor C36, and the other end of the third resistor R39 is grounded. The third resistor R38 is connected to the connection point between the third resistor R37 and the inverting input of the first operational amplifier U32. One end of the third relay K3 is connected to the third resistor R38, and the other end of the third relay K3 is grounded. The third relay K32 is connected to the IEPE sensor. The third fuse U33 is connected to the input connector.

[0044] In some embodiments, the second-stage amplifier includes a differential amplifier U31, a third resistor R31, a third resistor R32, a third resistor R33, a third resistor R34, a third resistor R35, a third resistor R36, a third capacitor C30, a third capacitor C31, a third capacitor C32, a third capacitor C33, and a third capacitor C34. The positive input terminal of the differential amplifier U31 is connected to the third resistor R35, which is connected to the output terminal of the first operational amplifier U32. One end of the third resistor R33 is connected to the junction of the positive input terminal of the differential amplifier U31 and the third resistor R35, and the other end of the third resistor R33 is connected to the output terminal of the differential amplifier U31. The negative output terminal is connected; the third capacitor C33 and the third resistor R33 are connected in parallel; the connection point between the third resistor R33 and the negative output terminal of the differential amplifier U31 is connected to the third resistor R31; one end of the third resistor R36 is connected to the negative input terminal of the differential amplifier U31, and the other end of the third resistor R36 is grounded; one end of the third resistor R34 is connected to the connection point between the third resistor R36 and the negative input terminal of the differential amplifier U31, and the other end of the third resistor R34 is connected to the positive output terminal of the differential amplifier U31; the third capacitor C34 and the third resistor R34 are connected in parallel; the connection point between the third resistor R34 and the positive output terminal of the differential amplifier U31 is connected to the third resistor R32. One end of the third zero capacitor C30 is connected to the third first resistor R31, and the other end of the third zero capacitor C30 is connected to the third second resistor R32. The third first capacitor C31 is connected to the connection point of the third zero capacitor C30 and the third first resistor R31. The third second capacitor C32 is connected to the connection point of the third zero capacitor C30 and the third second resistor R32. The third first capacitor C31 and the third second capacitor C32 are connected together. The connection point of the third first capacitor C31 and the third second capacitor C32 is grounded. The connection point of the third zero capacitor C30 and the third first resistor R31 is connected to the analog-to-digital converter. The connection point of the third zero capacitor C30 and the third second resistor R32 is connected to the analog-to-digital converter.

[0045] See Figure 3The third fuse, U33, is a TBU (Transient Blocking Unit), a type of high-speed self-resetting electronic fuse. The third diode, D31, is a TVS (Transient Voltage Suppressor Diode). Specifically, the third relay, K31, is a CPC1017; the third relay, K32, is a CPC1017, a 4-pin SOP miniature solid-state relay; and the third relay, K3, is a G6K-2F-Y-5VDC, an ultra-miniature signal relay. The first operational amplifier, U32, is an ADA4627, a 36V precision JFET input operational amplifier series (single-channel ADA4627-1 / dual-channel ADA4637-1) from Analog Devices, designed for precision signal links with high source impedance, low distortion, and low temperature drift. The differential amplifier U31 is the ADA4940, which is an ultra-low power, low noise, fully differential amplifier (FDA) from Analog Devices.

[0046] Specifically, the first-stage amplifier has a GAIN value of 1 / 11, the second-stage amplifier has a GAIN value of 0.5, and GAIN represents the amplification factor. The third relay K31 is used for AC / DC switching, the third relay K32 is used for IEPE switching, and the third relay K3 is used for rate switching.

[0047] The AC / DC switching section is an AC / DC sampling switching circuit. It controls the low-capacitance OptoMOS switch to switch the DC blocking capacitor at the front end of the amplifier circuit, enabling the circuit to switch between AC and DC sampling. OptoMOS is an abbreviation for "Optical + MOSFET", referring to a solid-state relay (SSR) technology that integrates an optocoupler and a power MOSFET in the same package.

[0048] Specifically, the first-stage amplifier uses an operational amplifier with high bandwidth, low noise, low bias current, and low input offset voltage. The gain of the amplification section can be changed by controlling the relay. The second-stage amplifier uses a low-distortion fully differential amplifier to send the signal to a high-precision analog-to-digital converter.

[0049] In some embodiments, the sound card motherboard includes an IEPE current source circuit, and an IEPE sensor is connected to the IEPE current source circuit; see also Figure 4 The IEPE current source circuit includes a first power supply, a second power supply, a second operational amplifier U41, a fourth resistor R41, a fourth resistor R42, a fourth resistor R43, a fourth resistor R44, a fourth resistor R45, a fourth capacitor C41, and a transistor U42. The non-inverting input of the second operational amplifier U41 is connected to the fourth and fifth resistors R45, which is connected to the second power supply. The output of the second operational amplifier U41 is connected to the fourth and second resistors R42, which is connected to the first power supply. One end of the fourth capacitor C41 is connected to the inverting input of the second operational amplifier U41, and the other end is connected to the output of the second operational amplifier U41. The fourth resistor R41 is connected to the fourth and second resistors R42. The drain of transistor U42 is connected to the fourth resistor R41, and the gate of transistor U42 is connected to the fourth and third resistors R43, which is connected to the output of the second operational amplifier U41. The source of transistor U42 is connected to the IEPE sensor. One end of the fourth resistor R44 is connected to the junction of the fourth capacitor C41 and the inverting input of the second operational amplifier U41, and the other end is connected to the junction of the drain of transistor U42 and the fourth resistor R41.

[0050] See Figure 4 The 24V power supply represents the first power supply, and the 20V power supply represents the second power supply. The second operational amplifier U41 is an ADA4627, and the transistor U42 is an MMBFJ175, which is a P-channel junction field-effect transistor (JFET). Both the first operational amplifier U32 and the second operational amplifier U41 are non-inverting amplifiers.

[0051] Specifically, the IEPE current source circuit has a built-in 24V / 4mA constant current source in each channel, which can directly drive IEPE (integrated electronic piezoelectric sensor) such as accelerometers and industrial microphones without the need for an external power supply, simplifying wiring (e.g., in vibration and noise monitoring and acoustic emission detection scenarios). The IEPE current source circuit uses a high-bandwidth, low-noise amplifier to reduce sampling noise.

[0052] In a specific embodiment, the sound card motherboard includes an EEPROM memory, and the FPGA programmable controller is connected to the EEPROM memory. Specifically, EEPROM is an abbreviation for "Electrically Erasable Programmable Read-Only Memory".

[0053] In a specific embodiment, the multi-functional USB sound card includes a software module, which is connected to the sound card motherboard.

[0054] See Figure 6Specifically, the software module consists of a lower-level program and a higher-level instruction system. The lower-level program is responsible for initializing the hardware chips and then performs corresponding data acquisition or output operations by receiving instructions from the higher-level program. The higher-level software sends instructions to the lower-level program to perform functions such as setting enable, sampling rate, gain selection, IEPE enable, and retrieving existing settings.

[0055] Specifically, the multi-functional USB sound card includes an audio acquisition port for receiving and acquiring sound signals, vibration signals, and noise signals. It also includes a sound card output port for signal output, an amplifier output port for signal amplification and output, and a USB interface for control and connection with a host computer.

[0056] This utility model's multi-functional USB sound card integrates an IEPE current source circuit, an AC / DC sampling switching circuit, and a low-noise amplifier circuit into one device. It enables a single device to sample multiple industrial sensors, eliminating the need for debugging personnel to carry multiple testing instruments. This greatly simplifies the complexity of on-site debugging and provides effective assistance and support for subsequent on-site debugging work.

[0057] This utility model proposes a multi-functional USB sound card, which is a system composed of a sound card motherboard, a 10W power amplifier board, a power module, a 200W transformer, terminal connectors, and host computer debugging software.

[0058] It should be understood that this utility model provides a multifunctional 16-channel USB sound card device for various industrial automation scenarios. This device can be used for testing in various situations, such as industrial sound acquisition, noise acquisition, acceleration acquisition, headphone microphone sound acquisition and testing, headphone output sound acquisition and testing, product stress testing, and stress testing of products by machine probes, thereby improving on-site debugging effects, increasing automation integration, and enhancing on-site work efficiency.

[0059] The above description is merely a preferred embodiment of this utility model. This utility model is not limited to the above-described embodiments. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this disclosure, as long as they achieve the same technical effect, should be included within the scope of protection of this disclosure and fall under the protection scope of this utility model. Within the protection scope of this utility model, the technical solutions and / or implementation methods can have various modifications and variations.

Claims

1. A multi-functional USB sound card, characterized in that, include: Sound card motherboard; The power module is connected to the sound card motherboard; A transformer, which is connected to the power module; A power amplifier board, which is connected to the sound card motherboard and the transformer; A power socket, which is connected to the transformer; Terminal connectors, which are connected to the sound card motherboard and the power amplifier board; The sound card motherboard, the power module, the transformer, the power amplifier board, the power socket, and the terminal connector are disposed inside the chassis. The sound card motherboard includes a low-noise amplifier circuit, an IEPE sensor, an analog-to-digital converter, and input connectors. Multiple input connectors are connected to multiple low-noise amplifier circuits, and multiple low-noise amplifier circuits are connected to the analog-to-digital converter. The IEPE sensor is connected to the connection point between the input connectors and the low-noise amplifier circuits.

2. A multi-functional USB sound card according to claim 1, characterized in that, The sound card motherboard includes a USB connector, a USB hub, a USB sound card driver chip, a USB-to-serial adapter, and an FPGA programmable controller. The USB connector is connected to the USB hub, the USB sound card driver chip is connected to the USB hub, the USB to serial port is connected to the USB hub, the FPGA programmable controller is connected to the USB sound card driver chip, and the FPGA programmable controller is connected to the USB to serial port.

3. A multi-functional USB sound card according to claim 2, characterized in that, The sound card motherboard includes a digital-to-analog converter, a signal amplification circuit, and an output connector. Multiple digital-to-analog converters are connected to the FPGA programmable controller, multiple analog-to-digital converters are connected to the FPGA programmable controller, multiple output connectors are connected to the signal amplification circuit, and multiple signal amplification circuits are respectively connected to multiple digital-to-analog converters.

4. A multi-functional USB sound card according to claim 3, characterized in that, The signal amplification circuit includes a third operational amplifier (U53), a fifth-first-second resistor (R512), a fifth-fourth fuse (U54), a fifth-first diode (D51), a fifth-third capacitor (C53), a fifth-fourth capacitor (C54), a fifth-fifth capacitor (C55), a fifth-sixth capacitor (C56), a fifth-seventh resistor (R57), a fifth-eighth resistor (R58), a fifth-ninth resistor (R59), a fifth-zero resistor (R510), and a fifth-first-first resistor (R511). One end of the fifth-first resistor (R512) is connected to the inverting input terminal of the third operational amplifier (U53), and the other end of the fifth-first resistor (R512) is connected to the output terminal of the third operational amplifier (U53). The output terminal of the third operational amplifier (U53) is connected to the fifth-fourth fuse (U54). One end of the fifth-first diode (D51) is connected to the connection point between the output terminal of the third operational amplifier (U53) and the fifth-fourth fuse (U54). The other end of the fifth-first diode (D51) is grounded. The fifth-sixth capacitor (C56) is connected in parallel with the fifth-first resistor (R512). The fifth-ninth... Resistor (R59) is connected to the junction of resistor 512 (R512) and the inverting input of the third operational amplifier (U53). Resistor 59 (R59) is connected to resistor 57 (R57). Resistor 510 (R510) is connected to the non-inverting input of the third operational amplifier (U53). One end of resistor 511 (R511) is connected to the junction of resistor 510 (R510) and the non-inverting input of the third operational amplifier (U53). The other end of resistor 511 (R511) is grounded. Resistor 510 (R510) is connected to resistor 58 (R58). One end of the fifth capacitor (C53) is connected to the connection point of the fifth resistor (R59) and the fifth resistor (R57), and the other end of the fifth capacitor (C53) is grounded. One end of the fifth capacitor (C54) is connected to the connection point of the fifth resistor (R510) and the fifth resistor (R58), and the other end of the fifth capacitor (C54) is grounded. One end of the fifth capacitor (C55) is connected to the connection point of the fifth resistor (R59) and the fifth resistor (R57), and the other end of the fifth capacitor (C55) is connected to the connection point of the fifth resistor (R510) and the fifth resistor (R58). The fifth fuse (U54) is connected to the output connector.

5. A multi-functional USB sound card according to claim 4, characterized in that, The signal amplification circuit includes a fourth operational amplifier (U51), a fifth capacitor (C51), a fifth resistor (R51), a fifth third resistor (R53), a fifth fourth resistor (R54), and a third power supply. The output terminal of the fourth operational amplifier (U51) is connected to the fifth resistor (R57). The inverting input terminal of the fourth operational amplifier (U51) is connected to the fifth capacitor (C51). The fifth capacitor (C51) is connected to the fifth resistor (R54). The fifth resistor (R54) is connected to the connection point between the output terminal of the fourth operational amplifier (U51) and the fifth resistor (R57). One end of the fifth resistor (R53) is connected to the fifth resistor (R57) and the fifth... The fifth resistor (R54) is connected at its connection point. The other end of the fifth resistor (R53) is connected to the connection point of the fifth capacitor (C51) and the inverting input of the fourth operational amplifier (U51). The non-inverting input of the fourth operational amplifier (U51) is connected to the fifth resistor (R51). The fifth resistor (R51) is connected to the third power supply. The digital-to-analog converter is connected to the connection point of the fifth resistor (R53) and the inverting input of the fourth operational amplifier (U51).

6. A multi-functional USB sound card according to claim 5, characterized in that, The signal amplification circuit includes a fifth operational amplifier (U52), a fifth resistor (R52), a fifth resistor (R55), a fifth resistor (R56), a fifth capacitor (C52), and a fourth power supply. The output terminal of the fifth operational amplifier (U52) is connected to the fifth eighth resistor (R58). The inverting input terminal of the fifth operational amplifier (U52) is connected to the fifth second capacitor (C52). The fifth second capacitor (C52) is connected to the fifth sixth resistor (R56). The fifth sixth resistor (R56) is connected to the connection point between the output terminal of the fifth operational amplifier (U52) and the fifth eighth resistor (R58). One end of the fifth fifth resistor (R55) is connected to the fifth second capacitor (C52) and the fifth... The inverting input of the fifth operational amplifier (U52) is connected at the connection point. The other end of the fifth resistor (R55) is connected to the connection point of the fifth resistor (R56) and the fifth resistor (R58). The non-inverting input of the fifth operational amplifier (U52) is connected to the fifth resistor (R52). The fifth resistor (R52) is connected to the fourth power supply. The digital-to-analog converter is connected to the connection point of the fifth resistor (R55) and the inverting input of the fifth operational amplifier (U52).

7. A multi-functional USB sound card according to claim 1, characterized in that, The low-noise amplifier circuit includes a first-stage amplifier and a second-stage amplifier. The first-stage amplifier is connected to the second-stage amplifier, the first-stage amplifier is connected to the IEPE sensor, the first-stage amplifier is connected to the input connector, and the second-stage amplifier is connected to the analog-to-digital converter.

8. A multi-functional USB sound card according to claim 7, characterized in that, The first stage amplifier includes a third relay (K31), a third relay (K32), a third relay (K3), a third capacitor (C35), a third capacitor (C36), a third fuse (U33), a third diode (D31), a first operational amplifier (U32), a third resistor (R37), a third resistor (R38), and a third resistor (R39). The third relay (K31) is connected in parallel with the third capacitor (C36), the third capacitor (C36) is connected to the third fuse (U33), the third relay (K32) is connected to the connection point of the third capacitor (C36) and the third fuse (U33), one end of the third diode (D31) is connected to the connection point of the third capacitor (C36) and the third fuse (U33), and the other end of the third diode (D31) is grounded. The non-inverting input of the first operational amplifier (U32) is connected to the third capacitor (C36), one end of the third resistor (R37) is connected to the inverting input of the first operational amplifier (U32), and the other end of the third resistor (R37) is connected to the first... The output terminal of the operational amplifier (U32) is connected to the third fifth capacitor (C35) and the third seventh resistor (R37). One end of the third ninth resistor (R39) is connected to the connection point between the non-inverting input terminal of the first operational amplifier (U32) and the third sixth capacitor (C36), and the other end of the third ninth resistor (R39) is grounded. The third eighth resistor (R38) is connected to the connection point between the third seventh resistor (R37) and the inverting input terminal of the first operational amplifier (U32). One end of the third relay (K3) is connected to the third eighth resistor (R38), and the other end of the third relay (K3) is grounded. The third second relay (K32) is connected to the IEPE sensor, and the third third fuse (U33) is connected to the input connector.

9. A multi-functional USB sound card according to claim 8, characterized in that, The second-stage amplifier includes a differential amplifier (U31), a third resistor (R31), a third resistor (R32), a third resistor (R33), a third resistor (R34), a third resistor (R35), a third resistor (R36), a third capacitor (C30), a third capacitor (C31), a third capacitor (C32), a third capacitor (C33), and a third capacitor (C34). The positive input terminal of the differential amplifier (U31) is connected to the third five-resistor (R35), the third five-resistor (R35) is connected to the output terminal of the first operational amplifier (U32), one end of the third three-resistor (R33) is connected to the junction of the positive input terminal of the differential amplifier (U31) and the third five-resistor (R35), and the other end of the third three-resistor (R33) is connected to the negative output terminal of the differential amplifier (U31). The third three-capacitor (C33) is connected in parallel with the third three-resistor (R33), and the junction of the third three-resistor (R33) and the negative output terminal of the differential amplifier (U31) is connected to the third one-resistor (R1). 31) Connection: One end of the third six-resistor (R36) is connected to the negative input terminal of the differential amplifier (U31), and the other end of the third six-resistor (R36) is grounded. One end of the third four-resistor (R34) is connected to the junction of the third six-resistor (R36) and the negative input terminal of the differential amplifier (U31), and the other end of the third four-resistor (R34) is connected to the positive output terminal of the differential amplifier (U31). The third four-capacitor (C34) is connected in parallel with the third four-resistor (R34), and the junction of the third four-resistor (R34) and the positive output terminal of the differential amplifier (U31) is connected to the third two-resistor (R32). One end of the third zero capacitor (C30) is connected to the third first resistor (R31), and the other end of the third zero capacitor (C30) is connected to the third second resistor (R32). The third first capacitor (C31) is connected to the connection point of the third zero capacitor (C30) and the third first resistor (R31). The third second capacitor (C32) is connected to the connection point of the third zero capacitor (C30) and the third second resistor (R32). The third first capacitor (C31) is connected to the third second capacitor (C32). The connection point of the third first capacitor (C31) and the third second capacitor (C32) is grounded. The connection point of the third zero capacitor (C30) and the third first resistor (R31) is connected to the analog-to-digital converter. The connection point of the third zero capacitor (C30) and the third second resistor (R32) is connected to the analog-to-digital converter.

10. A multi-functional USB sound card according to claim 1, characterized in that, The sound card motherboard includes an IEPE current source circuit, and the IEPE sensor is connected to the IEPE current source circuit. The IEPE current source circuit includes a first power supply, a second power supply, a second operational amplifier (U41), a fourth resistor (R41), a fourth resistor (R42), a fourth resistor (R43), a fourth resistor (R44), a fourth resistor (R45), a fourth capacitor (C41), and a transistor (U42). The non-inverting input of the second operational amplifier (U41) is connected to the fourth resistor (R45), which is connected to the second power supply. The output of the second operational amplifier (U41) is connected to the fourth resistor (R42), which is connected to the first power supply. One end of the fourth capacitor (C41) is connected to the inverting input of the second operational amplifier (U41), and the other end is connected to the output of the second operational amplifier (U41). The fourth resistor (R41) is connected to the fourth resistor (R42). The crystal... The drain of the transistor (U42) is connected to the fourth resistor (R41), the gate of the transistor (U42) is connected to the fourth resistor (R43), the fourth resistor (R43) is connected to the output of the second operational amplifier (U41), the source of the transistor (U42) is connected to the IEPE sensor, one end of the fourth resistor (R44) is connected to the connection point of the fourth capacitor (C41) and the inverting input of the second operational amplifier (U41), and the other end of the fourth resistor (R44) is connected to the connection point of the drain of the transistor (U42) and the fourth resistor (R41).

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