Multi-channel underwater metal pipeline detector signal receiver with serial port screen

Abstract

The utility model discloses a multichannel underwater metal pipeline detector signal receiver with a serial port screen. The multichannel underwater metal pipeline detector signal receiver mainly comprises a main controller module, three same signal input channels, an analog-to-digital conversion module, a reference voltage module, a GPS module, a Bluetooth module, an SD card module, a power supply module, a clock module, a matrix keyboard, the serial port screen and the like. The signal input channel comprises a low-pass filtering module, a pre-amplification module, a power frequency notch module and a main amplification module. The low-pass filtering module is connected with the pre-amplification module, the pre-amplification module is connected with the power frequency notch module, the power frequency notch module is connected with the main amplification module, the main amplification module is connected with the reference voltage module and the analog-to-digital conversion module, and the analog-to-digital conversion module, the Bluetooth module, the clock module, the GPS module, the SD card module and the man-machine interaction module are respectively connected with the main controller module. The power module supplies power to the whole system. According to the utility model, the Bluetooth module is utilized to realize communication with the upper computer in a wireless transmission mode, and the SD card module is designed, so that the storage capacity is improved to 32G.

Description

Technical Field

[0001] The utility model relates to the field of deep underground pipeline detection, in particular to the field of underwater metal pipeline detection, and specifically is a multi-channel underwater metal pipeline detector signal receiver with a serial port screen. Background Art

[0002] With the rapid development of cities, the number of deep metal pipelines buried under rivers, lakes and reservoirs is increasing. Underwater metal pipelines are important infrastructure related to the national economy and people's livelihood. They are buried deep, over long distances, and have complex burial conditions, but there is a lack of targeted detection instruments on the market. The existing receiver of underwater metal pipeline detector only contains a single channel and cannot detect the direction of the pipeline; the existing receiver of underwater metal pipeline detector has low detection depth and detection accuracy, making it difficult to accurately measure the burial depth of underwater metal pipelines; the existing receiver of underwater metal pipeline detector uses an ordinary LCD screen, which cannot intuitively observe the changes in the measured data; the existing receiver of underwater metal pipeline detector usually does not have a positioning function, and other instruments are needed to determine the horizontal position of the pipeline during detection; the existing receiver of underwater metal pipeline detector cannot be synchronized with the transmitting system when detecting weak signals or when the distance from the transmitting system is far; in addition, the existing receiver of underwater metal pipeline detector usually transmits data through wired communication methods such as serial port and USB, which brings inconvenience to operation; the storage capacity of the existing receiver of underwater metal pipeline detector is only tens of M bytes, which is difficult to store a large amount of measurement point data. Utility Model Content

[0003] In order to solve the above problems, the utility model proposes a underwater metal pipeline detector signal receiver with a serial port screen, specifically a multi-channel, high-speed underwater metal pipeline detector signal receiver with a serial port screen designed for underwater metal pipeline detection at great depths.

[0004] The present invention addresses the above-mentioned technical problems through a multi-channel, high-speed underwater metal pipeline detector signal receiver with a serial port display. The receiver's internal structure primarily includes a main controller, three independent signal input channels, an analog-to-digital conversion module, a reference voltage module, a GPS module, a Bluetooth module, an SD card module, a power supply module, and a clock module. The human-computer interaction module primarily includes a matrix keyboard and a serial port display. The main controller utilizes the GD32F407ZGT6. The signal input channel includes a low-pass filter, a preamplifier module, a power frequency trap, and a main amplification circuit. The system is characterized in that: the low-pass filter module is connected to the preamplifier module; the preamplifier module is connected to the power frequency trap module; the power frequency trap module is connected to the main amplifier module; the main amplifier module is connected to the reference voltage module and the analog-to-digital conversion module; the analog-to-digital conversion module, Bluetooth module, clock module, GPS module, SD card module, and human-computer interaction module are each connected to the main controller module. The power supply module provides power to the entire system. First, the multi-channel, high-precision underwater metal pipeline detector signal receiver utilizes a more rational signal input channel design, increasing the number of input channels to three. This design allows for receiving magnetic sensor signals in three directions, effectively filtering out power frequency interference and unwanted high-frequency signals while amplifying useful small-amplitude signals. This allows for accurate pipeline direction detection. Second, a 200kSPS analog-to-digital converter replaces a 30kSPS one, and a new low-temperature drift, high-output stability chip provides a reference voltage for the converter, significantly improving measurement accuracy. Third, a serial port display replaces an LCD screen. While traditional LCDs only display the measured signal value, this display generates a graphical display of the measured data, providing a more intuitive experience. The display also includes a built-in buzzer for prompts or alarms. Fourth, a newly added GPS module achieves high-precision timing synchronization with the transmitter system, effectively resolving synchronization issues when acquiring weak signals or when the transmitter system and the receiver are too far apart. Furthermore, the GPS chip can be used to locate the horizontal position of the pipeline. Fifth, a new Bluetooth module is added to realize communication with the host computer, and the measured data can be transmitted to the host computer in real time via wireless mode; Sixth, a new SD card module is added, with a maximum communication speed of up to 48MHz, and a maximum data transmission speed of 24M bytes per second, and the external expansion capacity of the receiver of this utility model is increased to more than ten G.

[0005] The main controller module model is GD32F407ZGT6, which has a built-in 1024K bytes of Flash and 192K bytes of RAM, a maximum main frequency of up to 180MHz, and a rich set of built-in peripheral interfaces.

[0006] The low-pass filter module is a first-order RC low-pass filter, which is used to filter out useless high-frequency signals above 10KHz.

[0007] The preamplifier module is a PGA205 programmable gain amplifier, used to amplify small-amplitude useful signals. The PGA205 has four gain factors: 1, 2, 4, and 8. The main controller controls the gain by setting the high and low levels of the amplifier's logic input pins. A potentiometer in the peripheral circuit adjusts the amplifier's offset.

[0008] The power frequency notch module is a band-stop filter based on an RC double-T network, has a high quality factor, and can effectively attenuate power frequency interference signals of about 50 Hz.

[0009] The main amplifier module is a PGA205 programmable amplifier integrated circuit, which further adjusts the amplitude of the input signal. The PGA205 has four amplification factors: 1, 2, 4, and 8. The STM32F429IGT6 controls the amplification factor by setting the high and low levels of the amplifier's logic input pins. A potentiometer in the peripheral circuit adjusts the amplifier's offset.

[0010] The core chip of the high-precision analog-to-digital conversion module is the AD7606-4, a 16-bit successive approximation high-precision analog-to-digital converter. It features built-in analog input clamp protection, a second-order anti-aliasing filter, a track-and-hold amplifier, a flexible digital filter, an on-chip 2.5V reference voltage source, and high-speed serial and parallel interfaces. All four channels can simultaneously sample at a throughput rate of up to 200 kSPS.

[0011] The reference voltage module is an ADR2525 voltage reference chip and its peripheral circuits, which are used to provide a high-precision 2.5V reference voltage to the analog-to-digital conversion chip.

[0012] The power module is composed of a WRA1212S-3WR2, a WRB1205S-3WR2, an AMS1117-3.3 and other devices; the WRA1212S-3WR2 is used to output a bipolar power supply of ±2V, the WRB1205S-3WR2 is used to output a 5V power supply, and the AMS1117-3.3 is used to output a 3.3V power supply.

[0013] The human-computer interaction includes a matrix keyboard and a serial port display screen. The serial port screen model is DC80480A050_01. The screen can draw the measured data into a curve graph, so that the data can be displayed on the screen more intuitively. The serial port screen also has a built-in buzzer that can be used for prompts or alarms.

[0014] The matrix keyboard is used to realize human-computer interaction and accept the operator's commands to realize various functions.

[0015] The clock circuit module is composed of DS1302 and its peripheral circuits. Since the peripheral circuits have a backup button battery, the module can still maintain the accuracy of clock information when the receiver is powered off.

[0016] The Bluetooth module is a JDY-31 module. The host computer can send commands through the Bluetooth module to adjust the amplification of the preamplifier and the main amplifier. In addition, the measured data can be transmitted to the host computer in real time wirelessly.

[0017] The GPS module is composed of a LEA-5H chip and its peripheral circuits, and has many advantages such as high integration, small size, low power consumption, and long service life. It can achieve high-precision timing synchronization with the transmission system, effectively solving the problem of being unable to synchronize when collecting weak signals, and the problem of being unable to synchronize due to the long distance between the transmission system and the receiver of the utility model. In addition, the horizontal position of the pipeline can also be located through the GPS chip.

[0018] The SD card module has a maximum communication speed of up to 48 MHz, can transmit up to 24 M bytes of data per second, and increases the external expansion capacity of the receiver of the utility model to more than ten G. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a specific circuit diagram of the low-pass filter module of the utility model;

[0021] Figure 3 This is a specific circuit diagram of the preamplifier module of the utility model;

[0022] Figure 4 This is a specific circuit diagram of the power frequency trap module of the utility model;

[0023] Figure 5 This is a specific circuit diagram of the main amplifier module of the utility model;

[0024] Figure 6 This is a specific circuit diagram of the reference voltage module of the utility model;

[0025] Figure 7 This is a specific circuit diagram of the analog-to-digital conversion module of the utility model;

[0026] Figure 8 This is a specific circuit diagram of the main controller module of the utility model;

[0027] Figure 9 This is the specific circuit diagram of the serial port screen of this utility model;

[0028] Figure 10 This is a specific circuit diagram of the matrix keyboard of the utility model;

[0029] Figure 11 This is a specific circuit diagram of the Bluetooth module of the utility model;

[0030] Figure 12 This is a specific circuit diagram of the clock module of the present utility model;

[0031] Figure 13 This is the specific circuit diagram of the GPS module of this utility model;

[0032] Figure 14 This is a specific circuit diagram of the SD card module of the utility model;

[0033] Figure 15 This is a specific circuit diagram of the power module of the utility model. DETAILED DESCRIPTION

[0034] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0035] See also Figure 1 Figure 2 is a schematic diagram of the overall structure of this utility model. It primarily includes a low-pass filter module 1, a preamplifier module 2, a power frequency notch module 3, a main amplifier module 4, an analog-to-digital converter module 5, a reference voltage module 6, a main controller module 7, a serial port display 8, a matrix keyboard 9, a Bluetooth module 10, a clock module 11, a GPS module 12, an SD card module 13, and a power supply module 14. The main controller module 7, based on the powerful GD32F407ZGT6, controls the other modules, converting the analog signal obtained from sensor testing into a digital signal after filtering, amplification, and other optimization steps, and calculating the amplitude characteristics.

[0036] The working process of the utility model is as follows: the three-component magnetic sensor signal enters the signal input channel, a low-pass filter filters out useless high-frequency signals, the preamplifier module amplifies the useful small-amplitude signal, the power frequency notch filters out 50Hz power frequency interference signals, the main amplification further adjusts the signal amplitude, and then sends it to the analog-to-digital conversion chip, which converts the optimized analog signal into a digital signal. Finally, it sends it to the main controller for amplitude calculation. After calculating the amplitude, the main controller reads the position and time information, then stores the calculated amplitude, as well as the read position and time information, in the memory chip and transmits it to the staff member's mobile phone or computer via the Bluetooth module. A curve chart of the measured data is displayed on the serial port screen. In addition, commands can be sent to the Bluetooth module to control the amplification factor of the preamplifier and main amplifier circuits.

[0037] See also Figure 2 , is a circuit schematic diagram of the utility model low-pass filter module 1. The filter module 1 uses RC low-pass filtering to filter out useless high-frequency signals above 10KHz.

[0038] See also Figure 3 The figure below shows the circuit schematic of the preamplifier module 2 of this utility model. This module uses the programmable amplifier chip PGA205, which has four gain factors. The bias voltage and power supply voltage are adjusted to +12V to achieve optimal linearity. This amplifies useful small-amplitude signals collected by the sensor.

[0039] See also Figure 4 The following is a schematic diagram of the power frequency trap module 3 of this utility model. This module is used to filter out power frequency interference generated by power transmission lines around the detection point. This module utilizes a band-stop filter based on an RC twin-T network, which has a high quality factor and can effectively attenuate the 50Hz input frequency by adjusting the capacitance and resistance.

[0040] See also Figure 5 The following is a schematic diagram of the main amplifier module 4 of this utility model. This module uses a programmable amplifier chip, the PGA205, with four gain factors. The bias voltage and power supply voltage are adjusted to +12V, ensuring optimal linear operation. This amplifies useful, smaller-amplitude signals collected by the sensor.

[0041] See also Figure 6 , is a circuit schematic diagram of the analog-to-digital conversion module 5 of the present invention. The analog-to-digital conversion module 5 uses the AD7606-4 chip, whose four channels can simultaneously sample at a throughput rate of up to 200KSPS.

[0042] See also Figure 7 The following is a schematic diagram of the circuit for the reference voltage module 6 of this utility model. This module, with its advantages of low temperature drift, provides a 2.5V reference voltage with an accuracy of one thousandth for the analog-to-digital conversion chip, improving the accuracy of the analog-to-digital conversion. The reference voltage chip used is the ADR4525.

[0043] See also Figure 8 The following is a schematic diagram of the main controller module 7 of this utility model. The main controller uses the GD32F407ZGT6, which has a Cortex-M4 core and features 192KB of RAM, 1024KB of FLASH, and a rich set of built-in peripherals. Its price / performance ratio is higher than that of the STM32 series chips.

[0044] See also Figure 9 , which is the circuit principle diagram of the utility model serial port screen 8. Serial port screen 8, model number DC80480A050_01, can draw the measured data into a curve graph, making the data more intuitively displayed on the screen, and the serial port screen has a built-in buzzer that can be used for prompts or alarms.

[0045] See also Figure 10, is a circuit diagram of the utility model matrix keyboard 9. The matrix keyboard 9 is used to receive operator commands and realize human-computer interaction.

[0046] See also Figure 11 , which is a circuit schematic diagram of the Bluetooth module 10 of the present invention. The Bluetooth module 10 uses the JDY-31 module. The host computer can send commands via the Bluetooth module to adjust the amplification of the preamplifier and the main amplifier. In addition, the measured data can be wirelessly transmitted to the host computer in real time.

[0047] See also Figure 12 , is a circuit schematic diagram of the clock module 12 of the present invention. The clock module 11 is used to provide accurate clock information to the receiver, and can still keep the clock information correct even when the power is off.

[0048] See also Figure 13 , which is a circuit schematic diagram of the GPS module 11 of the present invention. The GPS module 12 can achieve high-precision timing synchronization with the transmission system, effectively resolving the issue of synchronization failure when collecting weak signals, as well as the issue of synchronization failure due to the distance between the transmission system and the present invention's receiver. Furthermore, the GPS chip can be used to locate the horizontal position of the pipeline.

[0049] See also Figure 14 , is a circuit diagram of the utility model SD card module 13. The SD card module 13 has a maximum communication speed of up to 48MHz and can transmit up to 24M bytes of data per second, and increases the external expansion capacity of the utility model receiver to more than ten G.

[0050] See also Figure 15 , is a circuit schematic diagram of the power module 14 of the present invention. The power module 14 outputs ±2V, +5V, and +3.3V power to power the entire system.

Claims

1. A multi-channel underwater metal pipeline detector signal receiver with a serial port screen, characterized by It includes a main controller module, three identical and independent signal input channels, an analog-to-digital conversion module, a reference voltage module, a GPS module, a Bluetooth module, an SD card module, a power module, a clock module and a human-computer interaction module. The human-computer interaction module mainly includes a matrix keyboard and a serial port screen; the low-pass filter module is connected to the preamplifier module; the preamplifier module is connected to the power frequency notch module; the power frequency notch module is connected to the main amplifier module; the main amplifier module is connected to the reference voltage module and the analog-to-digital conversion module; the analog-to-digital conversion module, Bluetooth module, clock module, GPS module, SD card module and human-computer interaction module are respectively connected to the main controller module; the power module supplies power to the entire system.

2. The multi-channel underwater metal pipeline detector signal receiver with a serial port screen according to claim 1 is characterized by: The main controller module model is GD32F407ZGT6. The processor has 192K bytes of RAM and 1024K bytes of Flash, a maximum main frequency of up to 168MHz, and has rich built-in peripherals.

3. The multi-channel underwater metal pipeline detector signal receiver with a serial port screen according to claim 1 is characterized in that: The low-pass filter module is a first-order RC low-pass filter; the preamplifier module is PGA205 and its peripheral circuit. PGA205 is a programmable gain amplifier with four amplification factors of 1, 2, 4, and 8. The main controller controls the amplification factor by setting the high and low levels of the logic input pins on the amplifier, and the potentiometer in the peripheral circuit can adjust the offset of the amplifier; the power frequency notch module is a band-stop filter based on an RC double-T network with a high quality factor, which is used to filter out power frequency interference signals with a center frequency of about 50Hz; the main amplifier module is PGA205 and its peripheral circuit, with four amplification factors of 1, 2, 4, and 8. The main controller controls the amplification factor by setting the high and low levels of the logic input pins on the amplifier, and the potentiometer in the peripheral circuit can adjust the offset of the amplifier. The preamplifier module and the main amplifier module are used in series to provide seven amplification factors of 1, 2, 4, 8, 16, 32, and 64.

4. The multi-channel underwater metal pipeline detector signal receiver with a serial port screen according to claim 1 is characterized by: The analog-to-digital conversion module is based on the AD7606-4 chip, which is a 16-bit successive approximation high-precision analog-to-digital converter with built-in analog input clamp protection, a second-order anti-aliasing filter, a tracking and holding amplifier, a 2.5V on-chip reference voltage source, and high-speed serial and parallel interfaces. All four channels can be sampled simultaneously at a throughput rate of up to 200KSPS.

5. The multi-channel underwater metal pipeline detector signal receiver with a serial port screen according to claim 1 is characterized in that: The reference voltage module is an ADR2525 chip and its peripheral circuits, which provide a high-precision reference voltage for the analog-to-digital conversion module.

6. The multi-channel underwater metal pipeline detector signal receiver with a serial port screen according to claim 1, characterized in that: The human-computer interaction module includes a matrix keyboard and a serial port screen. The serial port screen model is DC80480A050_01. The serial port screen can plot the measured data into a curve graph, so that the data can be displayed more intuitively on the serial port screen. The serial port screen also has a built-in buzzer that can be used for prompts or alarms; the matrix keyboard can accept the operator's commands to realize human-computer interaction.

7. The multi-channel underwater metal pipeline detector signal receiver with a serial port screen according to claim 1, characterized in that: The power module consists of a WRA1212S-3WR2, a WRB1205S-3WR2, an AMS1117-3.3 and their peripheral circuits; the WRA1212S-3WR2 is used to output a ±12V bipolar power supply, the WRB1205S-3WR2 is used to output a 5V power supply, and the AMS1117-3.3 is used to output a 3.3V power supply; the power module is used to power the entire system.

8. The multi-channel underwater metal pipeline detector signal receiver with a serial port screen according to claim 1, characterized in that: The clock module is DS1302 and its peripheral circuits. Since the peripheral circuits have a backup button battery, the module can still maintain the accuracy of clock information when the receiver is powered off.

9. The multi-channel underwater metal pipeline detector signal receiver with a serial port screen according to claim 1, characterized in that: The Bluetooth module is a JDY-31 module, which transmits the data collected and converted by the receiver to the staff's mobile phone or computer in real time wirelessly, and the host computer can send commands through the Bluetooth module to control the functions of the receiver; the GPS module is a LEA-5H chip and its peripheral circuit, which uses the GPS chip to locate the horizontal position of the pipeline.

10. The multi-channel underwater metal pipeline detector signal receiver with a serial port screen according to claim 1, characterized in that: The SD card module has a maximum communication speed of 48MHz, can transmit up to 24M bytes of data per second, and increases the receiver's external expansion capacity to more than ten G.

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