A hand-held acoustic imager integrated with infrared imaging

Abstract

The utility model relates to a kind of hand-held acoustic imaging instrument integrated infrared imaging, including multiple digital microphones, multiple digital microphones are inhomogeneously distributed to constitute acoustic array in spiral shape, and microphone sound hole is opened in the outside of shell corresponding acoustic array;Infrared imaging module includes lens shell and infrared lens module group fixed in lens shell;Camera is arranged in the central position of acoustic array, and camera is embedded in the surface of shell;The other side of shell is provided with recess, and display module is arranged in recess, and control unit is communicatively connected with display module, and control unit is electrically connected with acoustic acquisition module, infrared imaging module and camera respectively;Power supply module is arranged in shell.The utility model integrates acoustic acquisition module and infrared imaging module in a shell, and is separately controlled by control unit, and user can use two kinds of functions simultaneously, without carrying two independent equipment, to improve work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of acoustic and optical detection equipment technology, specifically to a handheld acoustic imager with integrated infrared imaging. Background Technology

[0002] An acoustic imager is a specialized device that uses a microphone array to measure the sound field distribution within a certain range. It can be used to measure the position and radiation state of objects and display a visual image in the form of a cloud map, i.e., acoustic imaging measurement. The acoustic imager uses a microphone array to collect multi-channel audio data, and at a specified frequency, uses beamforming algorithms to calculate the sound source distribution information on the scanning plane. Then, it fuses the sound source distribution information with a real-world image, allowing for rapid determination of the spatial location and origin of the sound source from the intuitive fused image. This technology, which uses acoustics, electronics, and information processing to transform sound into a visually perceptible image, helps people intuitively understand sound fields, sound waves, and sound sources. It is commonly used for noise source localization analysis and for detecting the internal noise status of equipment.

[0003] An infrared imager is a thermal imaging instrument that uses infrared light to image targets. Infrared light is an invisible light wave with a wavelength between 0.75 and 1000 μm. It has strong penetrating power, good directionality, no loss, can penetrate smoke and dust, and produces a thermal effect in air, thus possessing night vision capabilities. An infrared imager allows operators to initially determine the heating situation and fault location by viewing the image color and hotspot tracking display on the screen. Further analysis allows for efficient and accurate identification of the problem. In applications, infrared imagers can be used for temperature detection and fault diagnosis of electrical equipment, as well as for non-destructive testing of building structures and facial recognition.

[0004] With the continuous development of technology, handheld acoustic imagers are increasingly widely used in various fields. However, most acoustic imagers on the market can only perform acoustic detection and cannot simultaneously perform infrared imaging. This prevents users from acquiring both acoustic and thermal image information of the target at the same time, thus affecting the effectiveness of use. Furthermore, while some handheld infrared and acoustic imagers exist, they are separate devices, making them inconvenient to use. Therefore, integrating infrared and acoustic imaging functions into a single device to achieve miniaturization, portability, and high efficiency is a new technology urgently needed in the market. Summary of the Invention

[0005] This invention addresses the problem of simultaneously acquiring sound and thermal image information of a target by proposing a handheld acoustic imager with integrated infrared imaging. The acoustic acquisition module and infrared imaging module are integrated into a single housing and controlled separately by a control unit. The housing structure is rationally designed, achieving both portability and high efficiency. Users can utilize both functions simultaneously without carrying two separate devices, thus improving work efficiency.

[0006] To achieve the above objectives, this utility model provides a handheld acoustic imager with integrated infrared imaging, including a housing, an acoustic acquisition module, and an infrared imaging module. The acoustic acquisition module includes multiple digital microphones, which are arranged in a spiral non-uniform distribution to form an acoustic array. The acoustic array is fixed inside the housing, and microphone sound holes are opened on the outside of the housing corresponding to the acoustic array. The infrared imaging module includes a lens housing and an infrared lens module fixed inside the lens housing, wherein the lens housing is detachably connected to the housing. A camera is positioned at the center of the acoustic array, and the camera is embedded in the surface of the housing; A groove is provided on the other side of the housing, and a display module is arranged in the groove. The display module is communicatively connected to a control unit, and the control unit is electrically connected to an acoustic acquisition module, an infrared imaging module, and a camera, respectively. The housing contains a power supply module that powers the acoustic acquisition module, infrared imaging module, camera, display module, and control unit.

[0007] Furthermore, the housing includes an end, a handle, and a tail. The end is a hollow rectangular structure, the handle is a cylindrical structure with an open lower end, and the tail is a stepped cylindrical structure. The end and handle are internally connected and are designed as a single unit. Both the end and handle include an upper cover and a lower cover, which are fastened together by screws to form the end and handle. The small-diameter end of the tail is placed inside the handle, and the tail and the handle are detachably connected.

[0008] The end is connected to the inside of the handle and is integrated into a single design, providing ample installation space for modules such as acoustic arrays and cameras. The cylindrical handle conforms to hand-holding habits, improves grip comfort, and facilitates operation.

[0009] Furthermore, the control unit includes an FPGA chip, which is communicatively connected to a USB chip and a WIFI module; The FPGA chip is also connected to a button unit, which includes a power button and a wrench button. The power button is located below the display module, and the wrench button is located below the acoustic array. The USB chip is connected to a USB expansion chip, and a USB port is provided on the housing corresponding to the interface of the USB expansion chip. An interface protective sleeve is provided corresponding to the USB port. The FPGA chip is also connected to a driver chip, which is electrically connected to the display module.

[0010] FPGA chips offer high processing speed and strong logic control capabilities, enabling them to quickly process large amounts of data generated by acoustic, infrared, and camera sensors, avoiding detection errors caused by data delays and adapting to fault detection scenarios with high real-time requirements. The combination of USB chip and WIFI module supports both wired (USB) and wireless (WIFI) transmission modes, allowing users to choose according to their scenarios and improving data transmission adaptability.

[0011] The button layout is reasonable, allowing users to turn on and control the device with one hand, enabling quick operation.

[0012] Furthermore, the power supply module is disposed in the cavity between the handle and the small-diameter end of the tail. The power supply module includes a removable battery, which includes a lithium battery and a power management unit. The lithium battery is electrically connected to the power management unit, and the power management unit is electrically connected to the control unit.

[0013] The removable battery design allows users to quickly replace the battery when it runs out, eliminating the need to wait for charging and ensuring uninterrupted operation. The power module is installed in the cavity between the handle and the tail, eliminating the need for additional space at the end area. This ensures a compact layout of all functional modules, without increasing the overall size and maintaining the portability of the handheld device.

[0014] Furthermore, a display screen cover is provided around the groove. The display screen cover includes an outer frame and a transparent layer. The transparent layer is embedded in the outer frame and fixed to the outer frame. The outer frame is fastened and fixed to the housing.

[0015] The display cover protects the display module.

[0016] Furthermore, the microphone sound hole is located at the end of the housing, and a rubber ring is provided at the outermost edge of the microphone sound hole. The rubber ring is waist-shaped and fixed to the housing.

[0017] The protruding rubber ring is used to prevent the microphone aperture from contacting external objects when the equipment is stored, thus protecting the microphone aperture and acoustic array.

[0018] Furthermore, heat sinks are provided on both sides of the end, the heat sinks are fan-shaped and fixed to the housing.

[0019] Furthermore, multiple arc-shaped grooves are equidistantly provided on one side of the handle, and the multiple arc-shaped grooves are longitudinally distributed. Anti-slip strips are fixedly installed in the arc-shaped grooves, and the anti-slip strips cover the arc-shaped grooves and protrude outwards.

[0020] The longitudinally distributed arc-shaped grooves on one side of the handle are ergonomically designed, allowing the user's fingers to naturally fit into the grooves when holding the handle, greatly increasing the friction between the hand and the handle and helping to prevent slipping.

[0021] The beneficial effects of this utility model through the above technical solution are as follows: (1) This utility model integrates an acoustic acquisition module and an infrared imaging module to acquire the sound information and infrared image information of the target. This allows users to simultaneously acquire the sound and thermal image information of the target, thereby gaining a more comprehensive understanding of the target's information. The device provided by this invention integrates infrared imaging and acoustic imaging functions into one unit, achieving miniaturization, portability, and high efficiency. Users can use both functions simultaneously without carrying two separate devices, thus improving efficiency.

[0022] (2) This utility model is easy to operate. The cylindrical handle conforms to hand-holding habits and, combined with anti-slip strips, ensures comfortable grip. A power button and a wrench button allow users to start and control the device with one hand. The removable battery design allows users to immediately replace the battery when it runs out, facilitating work needs. Furthermore, the FPGA chip processes dual-module data at high speed, improving the device's performance. Attached Figure Description

[0023] Figure 1 This is one of the structural diagrams of a handheld acoustic imager integrating infrared imaging according to this utility model; Figure 2 This is the second structural diagram of a handheld acoustic imager integrating infrared imaging according to this utility model; Figure 3 This is the third structural diagram of a handheld acoustic imager integrating infrared imaging according to this utility model; Figure 4 This is a schematic diagram showing the disassembly of the infrared imaging module of a handheld acoustic imager with integrated infrared imaging according to this utility model. Figure 5 This is a schematic diagram showing the disassembly of the tail and handle of a handheld acoustic imager with integrated infrared imaging according to this utility model. Figure 6 This is a circuit diagram of a handheld acoustic imager integrating infrared imaging according to the present invention.

[0024] Reference numerals: 1 for housing, 2 for acoustic acquisition module, 3 for infrared imaging module, 301 for lens housing, 302 for infrared lens module, 4 for microphone sound hole, 5 for camera, 6 for display module, 7 for control unit, 8 for power supply module, 9 for USB chip, 10 for WIFI module, 11 for power button, 12 for wrench button, 13 for USB expansion chip, 14 for interface protective cover, 15 for driver chip, 16 for display screen cover, 17 for rubber ring, 18 for heat sink, 19 for anti-slip strip, 20 for nameplate marking area, 101 for end, 102 for handle, 103 for tail. Detailed Implementation

[0025] Example 1 like Figures 1-6 As shown, a handheld acoustic imager with integrated infrared imaging includes a housing 1, an acoustic acquisition module 2 and an infrared imaging module 3. The acoustic acquisition module 2 includes multiple digital microphones, which are arranged in a spiral non-uniform distribution to form an acoustic array. The acoustic array is fixed inside the housing 1, and a microphone sound hole 4 is opened on the outside of the housing 1 corresponding to the acoustic array. The infrared imaging module 3 includes a lens housing 301 and an infrared lens module 302 fixed inside the lens housing 301. The lens housing 301 is detachably connected to the housing 1. A camera 5 is disposed at the center of the acoustic array, and the camera 5 is embedded in the surface of the housing 1; A groove is provided on the other side of the housing 1, and a display module 6 is provided in the groove. The display module 6 is communicatively connected to a control unit 7. The control unit 7 is electrically connected to the acoustic acquisition module 2, the infrared imaging module 3 and the camera 5 respectively. The housing 1 contains a power supply module 8, which supplies power to the acoustic acquisition module 2, the infrared imaging module 3, the camera 5, the display module 6, and the control unit 7.

[0026] In this example, the acoustic array has no fewer than 128 sensor channels, a MEMS digital microphone is selected with a frequency response range of 100Hz to 80kHz, a system sampling frequency of 130kHz, a microphone aperture of no more than 120mm, and an acoustic array imaging refresh rate of no less than 25Hz.

[0027] The infrared lens module 302 has a resolution of 640×512 and a maximum frame rate of 60Hz. This module uses a 640x512 vanadium oxide uncooled infrared detector, which is not affected by light environment and severe weather. The temperature measurement range is divided into two levels: low level -20℃~150℃ and high level 100℃~500℃.

[0028] The camera has at least 5 megapixels and uses a 1 / 4-inch CMOS QSXGA image sensor OV5640 manufactured by OmniVision. It supports automatic image control, automatic exposure, automatic white balance, automatic elimination of light stripes, and automatic black level calibration. It can output JPEG images in compressed format.

[0029] The housing 1 includes an end 101, a handle 102, and a tail 103. The end 101 is a hollow rectangular structure, the handle 102 is a cylindrical structure with an open lower end, and the tail 103 is a stepped cylindrical structure. The end 101 and the handle 102 are internally connected and are designed as a single unit. Both the end 101 and the handle 102 include an upper cover and a lower cover. The upper cover and the lower cover are fastened together by screws to form the end 101 and the handle 102. The small-diameter end of the tail 103 is placed inside the handle 102, and the tail 103 and the handle 102 are detachably connected.

[0030] The control unit 7 includes an FPGA chip, which is communicatively connected to a USB chip 9 and a WIFI module 10. The FPGA chip is also connected to a button unit, which includes a power button 11 and a wrench button 12. The power button 11 is located below the display module 6, and the wrench button 12 is located below the acoustic array. The USB chip 9 is connected to the USB expansion chip 13. A USB port is provided on the housing 1 corresponding to the interface of the USB expansion chip 13, and an interface protective sleeve 14 is provided corresponding to the USB port. The FPGA chip is also connected to a driver chip 15, which is electrically connected to the display module 6.

[0031] USB chip 9 uses the USB3320 module. This module is small in size, low in power consumption, has robust ESD performance, built-in overvoltage protection, and supports a maximum communication rate of 480Mbps. USB expansion chip 13 uses the USB2514, expanding the USB device interfaces extended from the FPGA chip to four. The FPGA chip is a Xilinx XC7045 chip, which combines a dual-core ARM Cortex-A9 processor and programmable logic devices, capable of running the Linux operating system and various software applications. It has rich peripheral interfaces, including two Gigabit Ethernet interfaces, two USB interfaces, an SD card interface, an SPI interface, a CAN bus interface, and a UART interface.

[0032] Display module 6 uses an 800x480 resolution LCD with touchscreen functionality, a maximum brightness of 1000 cd / m², and a viewing angle of 70°. The driver chip 15 is an AP3036B module with a control frequency of 1kHz. The AP3036B module uses PWM control; the higher the duty cycle, the brighter the display module 6.

[0033] The WIFI module 10 uses the BL-M8852BU1 module, which supports 802.11a / b / g / n / ax / ac wireless communication protocols.

[0034] The power supply module 8 is disposed in the cavity between the handle 102 and the small diameter end of the tail 103. The power supply module 8 includes a removable battery, which includes a lithium battery and a power management unit. The lithium battery is electrically connected to the power management unit, and the power management unit is electrically connected to the control unit 7.

[0035] The power supply module 8 uses a JRS2S66-2S2P removable battery with a nominal voltage of 7.2V and a capacity of 6600mAh. It has built-in battery power management and power indication functions, and the battery communication interface is I2C.

[0036] A display screen cover 16 is provided around the groove. The display screen cover 16 includes an outer frame and a transparent layer. The transparent layer is embedded in the outer frame and fixed to the outer frame. The outer frame is fastened and fixed to the housing 1.

[0037] The microphone sound hole 4 is located at the end 101 of the housing 1. A rubber ring 17 is provided at the outermost edge of the microphone sound hole 4. The rubber ring 17 is waist-shaped and is fixed to the housing 1.

[0038] Heat sinks 18 are provided on both sides of the end 101. The heat sinks 18 have a fan-shaped structure and are fixed to the housing 1.

[0039] The handle 102 has multiple arc-shaped grooves equidistantly distributed on one side. The multiple arc-shaped grooves are longitudinally distributed. Anti-slip strips 19 are fixedly installed in the arc-shaped grooves, and the anti-slip strips 19 cover the arc-shaped grooves and protrude outwards.

[0040] Below the power button 11 is a nameplate area 20, which is used to affix equipment nameplate information.

[0041] During operation, press the power button 11 below the display module 6. After the device starts up, the FPGA chip begins running the Linux operating system, the display module 6 lights up and enters the initialization interface. Use the touchscreen to access and set the operating parameters.

[0042] The user holds the handle 102, with their fingers conforming to the longitudinally distributed arc grooves and the outwardly protruding anti-slip strips 19. The cylindrical handle helps to maintain a stable grip. The user adjusts their position according to the detection target, so that the acoustic array (corresponding to the microphone sound hole 4) at the end 101 of the housing 1, the infrared lens module 302 and the central camera 5 are aligned with the detection target, ensuring that the detection ranges of the three overlap, so as to facilitate the synchronous acquisition of data.

[0043] Pressing the lever button 12 below the acoustic array simultaneously activates the acoustic acquisition module 2, the infrared imaging module 3, and the camera 5. The acoustic array acquires the target's sound information through a 128-channel MEMS digital microphone. The sound data is processed in real time by the FPGA chip and presented in the form of an acoustic spectrum on the display module 6. The infrared lens module 302 captures the target's thermal image, and the temperature measurement data is simultaneously superimposed on the thermal image. The camera 5 captures real-time images of the target and outputs clear JPEG format images, which are displayed synchronously on the display module 6 along with the sound and thermal image data.

[0044] Acoustic spectrum, thermal image and physical image can be transmitted to the outside via WIFI module 10.

[0045] After the test is completed, press the power button 11 again to turn off the device. Wait for the display module 6 to turn off and all modules to stop running.

[0046] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A handheld acoustic imager integrating infrared imaging, comprising a housing (1), an acoustic acquisition module (2), and an infrared imaging module (3), characterized in that, The acoustic acquisition module (2) includes multiple digital microphones, which are arranged in a spiral non-uniform distribution to form an acoustic array. The acoustic array is fixed inside the housing (1), and a microphone sound hole (4) is opened on the outside of the housing (1) corresponding to the acoustic array. The infrared imaging module (3) includes a lens housing (301) and an infrared lens module (302) fixed inside the lens housing (301). The lens housing (301) is detachably connected to the housing (1). A camera (5) is provided at the center of the acoustic array, and the camera (5) is embedded in the surface of the housing (1); A groove is provided on the other side of the housing (1), and a display module (6) is provided in the groove. The display module (6) is communicatively connected to a control unit (7). The control unit (7) is electrically connected to the acoustic acquisition module (2), the infrared imaging module (3), and the camera (5) respectively. The housing (1) is equipped with a power supply module (8), which provides power to the acoustic acquisition module (2), infrared imaging module (3), camera (5), display module (6) and control unit (7).

2. The handheld acoustic imager integrating infrared imaging according to claim 1, characterized in that, The housing (1) includes an end (101), a handle (102) and a tail (103). The end (101) is a hollow rectangular structure, the handle (102) is a cylindrical structure with an open lower end, and the tail (103) is a stepped cylindrical structure. The end (101) and the handle (102) are internally connected and are integrated. Both the end (101) and the handle (102) include an upper cover and a lower cover. The upper cover and the lower cover are fastened together by screws to form the end (101) and the handle (102). The small-diameter end of the tail (103) is placed inside the handle (102), and the tail (103) and the handle (102) are detachably connected.

3. The handheld acoustic imager integrating infrared imaging according to claim 1, characterized in that, The control unit (7) includes an FPGA chip, which is communicatively connected to a USB chip (9) and a WIFI module (10). The FPGA chip is also connected to a button unit, which includes a power button (11) and a wrench button (12). The power button (11) is located below the display module (6), and the wrench button (12) is located below the acoustic array. The USB chip (9) is connected to a USB expansion chip (13). A USB port is provided on the housing (1) corresponding to the interface of the USB expansion chip (13). An interface protective sleeve (14) is provided corresponding to the USB port. The FPGA chip is also connected to a driver chip (15), which is electrically connected to the display module (6).

4. A handheld acoustic imager integrating infrared imaging according to claim 2, characterized in that, The power supply module (8) is disposed in the cavity between the handle (102) and the small diameter end of the tail (103). The power supply module (8) includes a removable battery, which includes a lithium battery and a power management unit. The lithium battery is electrically connected to the power management unit, and the power management unit is electrically connected to the control unit (7).

5. A handheld acoustic imager integrating infrared imaging according to claim 2, characterized in that, The periphery of the groove is provided with a display cover plate (16), which includes an outer frame and a transparent layer. The transparent layer is embedded in the outer frame and fixed to the outer frame. The outer frame is fastened and fixed to the housing (1).

6. A handheld acoustic imager integrating infrared imaging according to claim 2, characterized in that, The microphone sound hole (4) is located at the end (101) of the housing (1). A rubber ring (17) is provided at the outermost edge of the microphone sound hole (4). The rubber ring (17) is waist-shaped and is fixed to the housing (1).

7. A handheld acoustic imager integrating infrared imaging according to claim 2, characterized in that, The two sides of the end (101) are provided with heat sinks (18), which are fan-shaped and fixed to the housing (1).

8. A handheld acoustic imager integrating infrared imaging according to claim 2, characterized in that, The handle (102) has multiple arc-shaped grooves equidistantly arranged on one side, and the multiple arc-shaped grooves are longitudinally distributed. Anti-slip strips (19) are fixedly arranged in the arc-shaped grooves, and the anti-slip strips (19) cover the arc-shaped grooves and protrude outwards.

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