CN218765849U - Circuit module for ultrasonic leakage detector - Google Patents
Circuit module for ultrasonic leakage detector Download PDFInfo
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- CN218765849U CN218765849U CN202222640396.9U CN202222640396U CN218765849U CN 218765849 U CN218765849 U CN 218765849U CN 202222640396 U CN202222640396 U CN 202222640396U CN 218765849 U CN218765849 U CN 218765849U
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Abstract
The utility model discloses a circuit module for an ultrasonic leakage detector, which comprises a power management board, an ultrasonic signal acquisition board, a FPGA-AD acquisition board and an ARM core board; the power management board is respectively and electrically connected with the ultrasonic signal acquisition board, the FPGA-AD acquisition board and the ARM core board and respectively supplies power to the ultrasonic signal acquisition board, the FPGA-AD acquisition board and the ARM core board; the ultrasonic signal acquisition board is used for acquiring the ultrasonic signals at the gas leakage position and filtering and amplifying the ultrasonic signals; the FPGA-AD acquisition board is electrically connected with the ultrasonic signal acquisition board and is used for converting and transmitting signals output by the ultrasonic signal acquisition board; the ARM core board is electrically connected with the FPGA-AD acquisition board and used for realizing data storage and display functions. The circuit module for the ultrasonic leakage detector has high-precision 16-bit AD sampling, high sampling rate and sampling length; the ultrasonic wave ultrasonic signal processing device has a visual processing function and can process the frequency range of 20 kHz-100 kHz ultra-wide ultrasonic signals.
Description
Technical Field
The utility model relates to an ultrasonic detection device circuit module technical field especially relates to a circuit module for ultrasonic leakage detector.
Background
The ultrasonic leakage detector is different from a specific gas sensor in that the specific gas sensor is limited by the specific gas which the ultrasonic leakage detector is designed to sense, but the ultrasonic leakage detector detects by sound, any gas generates vortex flow through a leakage hole, and the part of the wave band of ultrasonic waves exists, so that the ultrasonic leakage detector can sense the leakage of any kind of gas. When gas leaks from a pipeline or a cylinder, ultrasonic waves can be generated, and the ultrasonic waves can be monitored by a detector circuit module and can be applied to gas detection, leakage detection of aviation, aerospace, space stations and the like; the existing circuit module of the ultrasonic leakage detection device has the defects of low signal acquisition precision, small ultrasonic signal processing frequency range and the like.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned drawbacks or deficiencies in the prior art, it is desirable to provide a circuit module for an ultrasonic leakage detector.
The utility model provides a circuit module for an ultrasonic leakage detector, which comprises a power management board, an ultrasonic signal acquisition board, a FPGA-AD acquisition board and an ARM core board; wherein,
the power management board is respectively and electrically connected with the ultrasonic signal acquisition board, the FPGA-AD acquisition board and the ARM core board and respectively supplies power to the ultrasonic signal acquisition board, the FPGA-AD acquisition board and the ARM core board;
the ultrasonic signal acquisition board is used for acquiring the ultrasonic signal at the gas leakage position and filtering and amplifying the ultrasonic signal;
the FPGA-AD acquisition board is electrically connected with the ultrasonic signal acquisition board and is used for converting and transmitting the signals output by the ultrasonic signal acquisition board;
the ARM core board is electrically connected with the FPGA-AD acquisition board and used for achieving data storage and display functions.
Preferably, the ultrasonic signal acquisition board, the FPGA-AD acquisition board and the ARM core board are all provided with a power interface circuit; a charging management circuit and a power supply circuit are integrated on the power management board; the battery is electrically connected with the charging management circuit and is connected with the power supply circuit; the power supply circuit is electrically connected with the three power interface circuits respectively.
Preferably, the ultrasonic signal acquisition board is provided with an ultrasonic signal acquisition circuit, a high-pass filter circuit, an operational amplifier circuit and an analog switch circuit in an integrated manner.
Preferably, the operational amplifier circuit adopts an amplifier SGM8292 to perform three-level amplification; the analog switch circuit adopts an analog switch RS2259, and is designed to have adjustable amplification factor so as to adapt to different ultrasonic signals.
Preferably, the FPGA-AD acquisition board is integrated with a pre-bias circuit, an AD acquisition circuit, an FPGA processor circuit and a data transmission circuit; the pre-bias circuit is electrically connected with the analog switch circuit.
Preferably, the FPGA-AD acquisition board is further integrated with a USB camera interface circuit, an earphone interface circuit, an LCD interface circuit and an RJ45 interface circuit; the USB camera interface circuit is electrically connected with a camera; the earphone interface circuit is electrically connected with an earphone; the LCD interface circuit is electrically connected with an LCD display screen.
Preferably, an RK3568 processor circuit is integrated on the ARM core board, and a data storage circuit, an integrated power management circuit and an RTC circuit are electrically connected with the RK3568 processor circuit; the RK3568 processor circuit is electrically connected with the data transmission circuit and is used for transmitting ad data.
Preferably, the data transmission circuit is designed with two gigabit network cards, and the ad data is transmitted by udp communication; and the network ports of the two gigabit network cards are connected through a pin header.
Preferably, the RK3568 processor circuit is electrically connected with the USB camera interface circuit, the earphone interface circuit, the LCD interface circuit, and the RJ45 interface circuit, respectively.
Compared with the prior art, the beneficial effects of the utility model are that:
the circuit module for the ultrasonic leakage detector has high-precision 16-bit AD sampling, high sampling rate and sampling length; the system has a visual processing function, adopts a small high-definition camera output by a USB (universal serial bus), supplies power by 5V to realize dynamic observation, and reflects information such as a signal characteristic value, a leak hole position and the like processed by a core processor on a screen of an LCD (liquid crystal display) display screen; can process the frequency range of 20 kHz-100 kHz ultra-wide ultrasonic signals; according to performance tests, the amplification times can be adjusted to 100-10000 times or even higher, and the characteristic amplitude background noise of the circuit background noise of 37-43 kHz needs to be controlled below 15 mV.
It should be understood that what is described in this summary section is not intended to limit key or critical features of embodiments of the invention, nor is it intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a block diagram of each circuit of a circuit module for an ultrasonic leakage detector according to an embodiment of the present invention;
fig. 2 is a hardware overall hardware architecture diagram of a circuit module for an ultrasonic leakage detector according to an embodiment of the present invention;
FIG. 3 is an ultrasonic signal conditioning circuit;
FIG. 4 is a charge management circuit;
FIG. 5 is a power supply circuit;
FIG. 6 shows an AD acquisition circuit and a pre-bias circuit;
FIG. 7 is a gigabit network card port circuit;
FIG. 8 is a USB camera interface circuit;
FIG. 9 is a headphone interface circuit;
FIG. 10 is an LCD interface circuit;
FIG. 11 is an enlarged view of the circuit at A;
fig. 12 is an enlarged view of the circuit at B.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1 to 12, an embodiment of the present invention provides a circuit module for an ultrasonic leakage detector, which has main functions in a general development scheme: the ultrasonic signals are pre-amplified by a domestic chip, output analog signals are converted into digital signals through A/D, the digital signals are collected, processed and analyzed by an FPGA processor, the FPGA processor is transmitted to an ARM core board through a network to perform time-frequency signal processing, results are displayed by an LCD display screen, corresponding mode selection, parameter setting, result display and the like are performed, and flicker alarm is performed through background colors of the LCD display screen after result judgment. The utility model discloses the circuit module of application has responded the requirement of localization, has broken away from foreign restriction, adopts localization chip to realize that ultrasonic revealing detects, when having realized localization completely, technical index has also reached international advanced level.
The circuit module for the ultrasonic leakage detector comprises a power management board, an ultrasonic signal acquisition board, an FPGA-AD acquisition board and an ARM core board; wherein,
the power management board is respectively and electrically connected with the ultrasonic signal acquisition board, the FPGA-AD acquisition board and the ARM core board and respectively supplies power to the ultrasonic signal acquisition board, the FPGA-AD acquisition board and the ARM core board;
the ultrasonic signal acquisition board is used for acquiring the ultrasonic signals at the gas leakage position and filtering and amplifying the ultrasonic signals;
the FPGA-AD acquisition board is electrically connected with the ultrasonic signal acquisition board and is used for converting and transmitting the signals output by the ultrasonic signal acquisition board;
and the ARM core board is electrically connected with the FPGA-AD acquisition board and is used for realizing the functions of data storage and display.
In a preferred embodiment, the ultrasonic signal acquisition board, the FPGA-AD acquisition board and the ARM core board are all provided with a power interface circuit; a charging management circuit and a power supply circuit are integrated on the power management board; the battery is electrically connected with the charging management circuit and is connected with the power supply circuit; the power supply circuit is electrically connected with the three power interface circuits respectively.
The charging management circuit adopts a charging management chip SGM41526 and can charge 3 batteries, the total voltage is 12.6V, and the automatic selection and switching of a power supply path (a battery and an adapter) and the isolation protection among the power supply path (the battery and the adapter) are realized by utilizing two external N-MOS and one P-MOS on the periphery of the SGM41526; the parameter characteristics are as follows:
4.5V-22V input;
a charging efficiency of 95.2;
2, 3 and 4 batteries can be connected;
possesses intelligent management function.
The power supply circuit adopts a chip WRA0512S-1WR2 of the Jinshengyangyang company to generate a power supply of +/-12V for an operational amplifier circuit of the ultrasonic signal acquisition board, and the parameter characteristics are as follows:
input voltage range: 9-36V;
working temperature: -40 ℃ to 85 ℃;
the short-circuit protection can be continued, and the self-recovery is realized;
output overvoltage protection;
the startup and shutdown has no overshoot, and the dynamic response is fast.
In a preferred embodiment, referring to fig. 3, the ultrasonic signal acquisition board is integrated with an ultrasonic signal conditioning circuit, such as an ultrasonic signal acquisition circuit, a high-pass filter circuit, an operational amplifier circuit, and an analog switch circuit.
In a preferred embodiment, the operational amplifier circuit adopts an amplifier SGM8292 to perform three-stage amplification; the analog switch circuit adopts an analog switch RS2259, and is designed to have adjustable amplification factor so as to adapt to different ultrasonic signals.
The operational amplifier gain of the ultrasonic leak detector of the ultrasonic signal acquisition board can be set by setting an adjustable analog switch RS2259, the chip is connected to the FPGA through a common IO interface, the switch is controlled, and the operational amplifier gain of the ultrasonic signal is adjusted, so that the operational amplifier gain of the ultrasonic signal can be 100-10000 times, and the tiny ultrasonic signal can be effectively amplified and sampled; and simultaneously SGM8292 operational amplifier is adopted.
The ultrasonic signal is generated by the ultrasonic sensor, and the signal is a weak signal lower than 1mv, so unnecessary direct current components are filtered through a C5 filter capacitor, then three-stage amplification is carried out through an operational amplifier circuit, and the amplified signal can be provided for an AD acquisition circuit to obtain the required voltage for an FPGA processor circuit.
In a preferred embodiment, a pre-bias circuit, an AD acquisition circuit, an FPGA processor circuit and a data transmission circuit are integrated on the FPGA-AD acquisition board; the pre-bias circuit is electrically connected with the analog switch circuit.
The +/-5V signal from the ultrasonic signal acquisition board is converted into a-0.3V to 5.3V signal which can be accepted by an AD chip through an AD-CBM79AD60G front-end circuit, a proper bias voltage is added into an operational amplifier in the design, a unipolar signal is converted into a bipolar signal and then sent into an ADC, and the dynamic range is ensured; and converting the signal from a single end to a difference, and simultaneously performing anti-aliasing filtering processing to finish the adjustment of the bandwidth.
The front value bias circuit adopts a CBM8656 chip, and the parameter characteristics are as follows:
Low offset voltage：250μV；
Offset voltage drift：0.4μV/℃typ；
Bandwidth：28MHz。
the AD acquisition circuit adopts a CBM79AD60G chip, and the parameter characteristics are as follows:
sampling rate: 5MSps;
18-bit resolution, no missing code;
signal-to-noise ratio (SNR): 95.5dB;
linearity error (INL): 2.0LSB;
low power consumption: 64.5mW.
The FPGA adopts EG4X20BG256 of Shanghai' an Lu information technology, and the parameter characteristics are as follows:
19600 LUTs, with a number of user IOs from 71 to 193;
high performance, flexible input/output buffers;
20K logical resources.
In a preferred embodiment, the FPGA-AD acquisition board is further integrated with a USB camera interface circuit, an earphone interface circuit, an LCD interface circuit and an RJ45 interface circuit; the USB camera interface circuit is electrically connected with a camera; the earphone interface circuit is electrically connected with an earphone; the LCD interface circuit is electrically connected with an LCD display screen.
In order to more directly display field data, a micro usb camera is designed for photographing, a usb interface is added, and the camera is connected through the usb.
In order to conveniently check the leakage position, an earphone interface is designed, and once ultrasonic leakage occurs, the earphone can emit noise which is easy to distinguish.
The liquid crystal display and touch interface is used for a man-machine interface of an instrument and mainly completes the setting of the instrument, the display and the alarm of ultrasonic signals and the like.
The LCD adopts Shenzhen Kodake KD035VGFIA111-C041A, and the parameter characteristics are as follows:
size: 3.5 cun;
the resolution is 480 x 640;
the external dimension is as follows: 64 x 85 x 4.75mm;
working temperature: -20 to-70 ℃.
In a preferred embodiment, an RK3568 processor circuit is integrated on the ARM core board, and a data storage circuit, an integrated power management circuit and an RTC circuit are electrically connected with the RK3568 processor circuit; the RK3568 processor circuit is electrically connected with the data transmission circuit and is used for transmitting ad data.
Ruixin micro RK3568 has the following parameter characteristics:
the a55 architecture and G52 graphics processor;
the PCIE network support 3.01 multiplied by 2/2 multiplied by 1Lanes, simultaneously support PCIE2.11x1lane, and meet the expansion requirements of 4G/5G, wifi, multiple network ports, NPU and the like;
supporting 3x SATA3.0, and solving various unstable problems of the traditional AP processor USB extended SATA;
at most, 4 paths of USB ports are supported, namely 1xUSB3.0/USB2.0 HOST;
the Ethernet controller supports double gigabit Ethernet ports, supports QSGMII to reduce the occupation of IO ports, and meets the high-performance and flexible input/output buffer required by multiple network ports of industrial control, internet of things gateways and the like;
rich display interfaces mipi, hdmi, edp.
The data storage circuit comprises an EMMC circuit and a DDR circuit, wherein the EMMC circuit adopts a macro core HG-EMC032-N, and the DDR circuit adopts a Shenzhen market Jiang Bolong NCLDXC1MJ512M32 chip.
The ARM core board is connected to the FPGA-AD acquisition board through the board connector, the main function is that AD data are transmitted through a network and the FPGA-AD acquisition board and are displayed through the LCD display screen, meanwhile, the USB camera is connected to acquire images, and the result of whether ultrasound leaks is output through the earphone.
In a preferred embodiment, the data transmission circuit is designed with two gigabit network cards, and the ad data is transmitted by udp communication, wherein the ad data comprises original data and fft-converted data; the net ports of the two kilomega network cards are connected through the pin header.
The PHY is shanghai scenery JL2xx1, and the parameter characteristics are as follows:
the single-port gigabit Ethernet physical layer transceiver conforms to the standard protocols of 1000BASE-T, 100BASE-TX and 10 BASE-T;
supporting the rgmii interface sgmii interface.
In a preferred embodiment, the RK3568 processor circuit is electrically connected to the USB camera interface circuit, the headphone interface circuit, the LCD interface circuit, and the RJ45 interface circuit, respectively.
Ultrasonic signal uses the FPGA treater control sampling chip CBM79AD60G of ampere way to carry out high-speed collection, and the data after the sampling is deposited in FIFO after FPGA treater carries out the FFT calculation, then conveys ARM nuclear core plate through network communication, and ARM nuclear core plate carries out coefficient correction with the data received after, shows the result on the LCD display screen, conveys the host computer through the giga net gape simultaneously and shows.
The circuit module comprises a power management board, an FPGA-AD acquisition board, an ARM core board and an ultrasonic signal acquisition board, and the main technical indexes are as follows:
1. the method has the advantages that 16-bit AD sampling with high precision is achieved, and the sampling rate and the sampling length are high;
2. the ultrasonic digital signal processing and control module takes FPGA, ARM, DSP and the like as core processors, and the devices are selected to be domestic industrial grade (including) or above devices;
3. the visual processor adopts a small high-definition camera output by a USB (universal serial bus), supplies power by 5V to realize dynamic observation, and reflects information such as a signal characteristic value, a leak hole position and the like processed by the core processor on a screen;
4. range of ultrasound signal frequencies that can be processed: 20 kHz-100 kHz; designing a filter;
5. the maximum sampling frequency can reach 3MHz, and the device has settable capacity;
6. the maximum sampling point number is not less than 9k, and the settable capacity is achieved;
7. the data output, the picture output, the ground test check, the system software update processing and system self-check, the fault isolation positioning and the like of the equipment are realized through the Ethernet interface, and the equipment is used for ground test;
8. the touch screen is provided with a color liquid crystal touch screen, the size of the touch screen is not more than 5 inches, and a smooth curve can be displayed;
9. all devices on the module adopt products of domestic industrial grade and above, the selected devices on the board meet the requirements of an environmental test, and the products can verify that the working temperature of the devices ranges from minus 20 ℃ to plus 70 ℃ through the environmental test; the storage temperature is ranged from minus 40 ℃ to plus 80 ℃;
10. the algorithm for processing data should have the functions of FFT, spectrum analysis, amplitude analysis, band-pass filtering, setting, beam forming, etc.
In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood broadly, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
In the description of the present application, the description of the terms "one embodiment," "some embodiments," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (9)
1. A circuit module for an ultrasonic leakage detector is characterized by comprising a power management board, an ultrasonic signal acquisition board, an FPGA-AD acquisition board and an ARM core board; wherein,
the power management board is respectively and electrically connected with the ultrasonic signal acquisition board, the FPGA-AD acquisition board and the ARM core board and respectively supplies power to the ultrasonic signal acquisition board, the FPGA-AD acquisition board and the ARM core board;
the ultrasonic signal acquisition board is used for acquiring the ultrasonic signal at the gas leakage position and filtering and amplifying the ultrasonic signal;
the FPGA-AD acquisition board is electrically connected with the ultrasonic signal acquisition board and is used for converting and transmitting the signals output by the ultrasonic signal acquisition board;
the ARM core board is electrically connected with the FPGA-AD acquisition board and used for realizing data storage and display functions.
2. The circuit module for an ultrasonic leakage detector according to claim 1, wherein the ultrasonic signal acquisition board, the FPGA-AD acquisition board and the ARM core board are provided with power interface circuits; the power management board is integrated with a charging management circuit and a power supply circuit; the charging management circuit is electrically connected with a battery, and the battery is connected with the power supply circuit; the power supply circuit is electrically connected with the three power interface circuits respectively.
3. The circuit module for an ultrasonic leakage detector according to claim 2, wherein the ultrasonic signal acquisition board is integrally provided with an ultrasonic signal acquisition circuit, a high-pass filter circuit, an operational amplifier circuit and an analog switch circuit.
4. The circuit module for an ultrasonic leakage detector according to claim 3, wherein the operational amplifier circuit performs three-stage amplification using an amplifier SGM 8292; the analog switch circuit adopts an analog switch RS2259, and is designed to have adjustable amplification factor so as to adapt to different ultrasonic signals.
5. The circuit module for an ultrasonic leakage detector according to claim 4, wherein a pre-bias circuit, an AD acquisition circuit, an FPGA processor circuit and a data transmission circuit are integrated on the FPGA-AD acquisition board; the pre-bias circuit is electrically connected with the analog switch circuit.
6. The circuit module for an ultrasonic leakage detector according to claim 5, wherein a USB camera interface circuit, an earphone interface circuit, an LCD interface circuit and an RJ45 interface circuit are further integrated on the FPGA-AD collecting board; the USB camera interface circuit is electrically connected with a camera; the earphone interface circuit is electrically connected with an earphone; the LCD interface circuit is electrically connected with an LCD display screen.
7. The circuit module for an ultrasonic leakage detector according to claim 6, wherein an RK3568 processor circuit is integrated on the ARM core board, and a data storage circuit, an integrated power management circuit and an RTC circuit are electrically connected to the RK3568 processor circuit; the RK3568 processor circuit is electrically connected with the data transmission circuit and is used for transmitting ad data.
8. The circuit module for an ultrasonic leakage detector according to claim 7, wherein the data transmission circuit is designed with two gigabit network cards, and transmits ad data by udp communication; and the net ports of the two kilomega network cards are connected through the pin header.
9. The circuit module of claim 8, wherein the RK3568 processor circuit is electrically connected to a USB camera interface circuit, an earphone interface circuit, an LCD interface circuit, and an RJ45 interface circuit, respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222640396.9U CN218765849U (en) | 2022-10-09 | 2022-10-09 | Circuit module for ultrasonic leakage detector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222640396.9U CN218765849U (en) | 2022-10-09 | 2022-10-09 | Circuit module for ultrasonic leakage detector |
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| CN218765849U true CN218765849U (en) | 2023-03-28 |
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| CN202222640396.9U Active CN218765849U (en) | 2022-10-09 | 2022-10-09 | Circuit module for ultrasonic leakage detector |
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