CN107271544B - Pulse eddy current nondestructive testing system based on ZigBee technology - Google Patents
Pulse eddy current nondestructive testing system based on ZigBee technology Download PDFInfo
- Publication number
- CN107271544B CN107271544B CN201710584788.9A CN201710584788A CN107271544B CN 107271544 B CN107271544 B CN 107271544B CN 201710584788 A CN201710584788 A CN 201710584788A CN 107271544 B CN107271544 B CN 107271544B
- Authority
- CN
- China
- Prior art keywords
- circuit
- chip
- control chip
- stm32f407
- controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005516 engineering process Methods 0.000 title claims abstract description 24
- 238000009659 non-destructive testing Methods 0.000 title claims abstract description 12
- 239000000523 sample Substances 0.000 claims abstract description 40
- 230000003750 conditioning effect Effects 0.000 claims abstract description 22
- 238000004891 communication Methods 0.000 claims abstract description 12
- 230000005284 excitation Effects 0.000 claims abstract description 9
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical group [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 239000013078 crystal Substances 0.000 claims description 3
- 101100136064 Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv) PE13 gene Proteins 0.000 claims description 2
- 102220640101 MAL-like protein_W25Q_mutation Human genes 0.000 claims 3
- 238000012360 testing method Methods 0.000 abstract description 25
- 238000001514 detection method Methods 0.000 abstract description 17
- 230000007547 defect Effects 0.000 abstract description 13
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000004458 analytical method Methods 0.000 abstract description 3
- 238000003860 storage Methods 0.000 abstract description 3
- 238000011156 evaluation Methods 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 8
- 239000002131 composite material Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000005672 electromagnetic field Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Electrochemistry (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention relates to a pulse eddy current nondestructive testing system based on a ZigBee technology, and belongs to the technical field of nondestructive testing and evaluation. The system comprises a probe, a signal conditioning circuit, a power amplifier, a controller, a routing node, a coordination node and an upper computer. The detection system generates a pulse width modulation waveform through a controller, the pulse width modulation waveform is amplified by a power amplifier to drive an excitation coil, a sensor part collects a synthesized magnetic field of a secondary magnetic field and a primary magnetic field and converts the synthesized magnetic field into an electric signal, and the electric signal is subjected to analog-to-digital conversion in the controller after passing through a signal conditioning circuit. The controller is connected with the routing node, the routing node is communicated with the coordination node, and the coordination node transmits the collected synthesized magnetic field data information to the upper computer for storage, analysis and display through serial communication. The invention can detect the defect and damage condition of the test piece on line; because of adopting the wireless communication technology, the complex connection between the workshop and the upper computer is simplified, and the cost is reduced.
Description
Technical Field
The invention relates to a pulse eddy current nondestructive testing system based on a ZigBee technology, and belongs to the technical field of nondestructive testing and evaluation.
Background
A large number of parts are produced daily on a workshop line, in which some reject products are mixed. The main detection mode at present is to centralize the parts just produced and take the parts to a detection department for detection, and the detection mode is time-consuming and labor-consuming and has low efficiency. With the rapid development of computer technology, microelectronic technology and information management technology, automatic detection technology gradually goes from centralized to decentralized, networked, intelligent and integrated.
The wireless sensor network system is an important component in the industrial production process, can realize remote monitoring and ensure the safety of equipment in the production process, is an important sign of modern industrial development, and reflects the close connection between industrial development and the Internet. At present, a GPRS wireless transmission mode is proposed to remotely obtain defect and damage data of production parts in workshops, and the GPRS charges according to flow, so that the terminal scale is large, and the long-term use cost is necessarily higher although the problem of complex connection of wired communication is solved.
Disclosure of Invention
The invention aims to solve the technical problem of the prior detection technology by providing a pulse eddy current nondestructive detection system based on the ZigBee technology. By utilizing the eddy current detection technology, the defect and damage condition of the test piece can be analyzed through the change of the magnetic field in the test piece; the characteristic that the array detector with a special shape can be used for multipoint acquisition is utilized, and when a test piece passes through the array detector, the internal defect and damage condition of the whole test piece can be acquired; the wireless transmission technology is utilized, collected data can be timely transmitted to an upper computer for storage, analysis and display, complex connection between a workshop and the upper computer is simplified, and cost is saved. The detection mode not only improves the detection efficiency and saves the cost, but also improves the management efficiency, and brings great convenience for the detection of the test piece. The device has a compact structure, and can perform wireless low-power consumption on-line detection on a test piece; the expansion is convenient, the application range is wide, the safety and reliability are realized, meanwhile, the labor is saved, and once equipment is successfully connected, the operation is convenient, so that the usability and the popularization are strong.
The invention adopts the technical scheme that: the pulse eddy current nondestructive detection system based on the ZigBee technology comprises an array detector, a signal conditioning circuit 6, a power amplifier 7, a controller 1, a routing node 2, a coordination node 3 and an upper computer 4, wherein the array detector is a semi-cylinder surrounded by a plurality of probes 5, the appearance is tunnel-shaped, the probe 5 is erected on a production line and does not move along with the movement of the production line, the probes 5 comprise enameled wires, manganese-zinc ferrite cores and Hall magnetic sensor circuits, excitation coils are formed on the manganese-zinc ferrite cores by winding enameled wires, circuit boards of the Hall magnetic sensor circuits are tightly attached to the bottoms of the manganese-zinc ferrite cores and are parallel to a horizontal plane, the controller 1 comprises a first stm32f407 control chip, the routing node 2 comprises a first ZigBee chip CC2430, and the coordination node 3 comprises a second stm32f407 control chip 1111 and a second ZigBee chip CC24301010;
the probe 5 is used for detecting a tested piece passing through the lower part of the probe 5, the input end of the probe is connected with the output end of the power amplifier 7, the output end of the probe is connected with the input end of the signal conditioning circuit 6, the output end of the signal conditioning circuit 6 is connected with the input end of the controller 1, the output end of the controller 1 is respectively connected with the input end of the power amplifier 7 and the first ZigBee chip CC2430 in the routing node 2, the controller 1 generates PWM waves through a universal timer in the first stm32f407 control chip, the PWM waves are amplified by the power amplifier 7 to drive the exciting coil, the first ZigBee chip CC2430 is in wireless communication with the second ZigBee chip CC243010 in the coordination node 3 through a wireless radio frequency antenna, the second ZigBee chip CC243010 is connected with the second stm32f407 control chip 11, and the second stm32f407 control chip 11 is connected with the upper computer 4.
The enameled wire with the diameter of 0.3mm is wound on the manganese-zinc ferrite core to form an exciting coil with the inner diameter of 5mm, the outer diameter of 25mm and the height of 20mm, and the Hall sensor circuit adopts a patch type linear Hall element HAL49E.
The signal conditioning circuit includes: the filtering circuit adopts a second-order RC active low-pass filter, R14 and C3 form a first-order low-pass filter circuit, R15 and C4 form a second-order low-pass filter circuit, the filtered circuit enters a UA741CD amplifying circuit, two first-order low-pass filter circuits and UA741CD operational amplifiers are connected in series, the output port of the UA741CD operational amplifiers is connected with the controller 1, the amplifying circuit is formed by a three-operational-amplifier differential amplifying circuit, two OPA335 chips form a differential amplifying part, and then the UA741CD amplifying circuit is connected in series, and two output ends of the probe 5 are respectively connected to the positive end and the negative end of the two OPA335 amplifiers for differential amplification.
The second stm32f407 control chip 11 and the second ZigBee chip CC243010 in the coordination node 3 are communicated through a USART serial port.
The serial port pins TX and RX of the first stm32f407 control chip are respectively connected with the serial port pins RX and TX of the first ZigBee chip CC2430, and the serial port pins TX and RX of the second stm32f407 control chip 11 are respectively connected with the serial port pins RX and TX of the second stm32f407 control chip 11.
The controller 1 further comprises a crystal oscillator, a reset circuit 9, a USB circuit, a standby battery, a JTAG circuit, a FLASH memory circuit and a power management circuit 8, wherein the USB circuit is used for downloading programs into a chip, the USB circuit adopts a CH340G chip, the USB circuit and a first stm32f407 control chip carry out data transmission through a USART1, TX and RX pins of the CH340G chip are respectively connected with U1 TX and U1 RX pins of the first stm32f407 control chip, and U1 TX and U1 RX pins of the first stm32f407 control chip are respectively connected with common input and output ports PA10 and PA11 of the first stm32f407 control chip, namely: common input/output ports PA10 and PA11 of the first stm32f407 control chip are initialized through software and can be multiplexed into receiving/transmitting pins of the serial port 1, namely U1-TX and U1-RX, the power management circuit 8 comprises a 5V direct current voltage input circuit and a 5V-to-3.3V circuit, the 5V direct current voltage input circuit adopts an MP2359 chip, the 5V-to-3.3V circuit adopts an AMS1117 chip, the FLASH memory circuit adopts a W25Q128 chip, the W25Q128 chip is communicated with the first stm32f407 control chip through an SPI serial port mode, a CLK pin, an SI pin and an SO pin of the W25Q128 chip are respectively connected to SPI 1-SCK, SPI 1-MOSI and SPI 1-MISO pins of the first stm32f407 control chip, and the JTAG circuit is used for online debugging of programs, and the first stm32f407 control chip is provided with JTAG ports.
The power amplifier 7 adopts an LM386 module, the maximum gain reaches 200, an-INPUT pin of the LM386 module is grounded, a +INPUT pin receives the pulse width modulation waveform generated by the first stm32f407 controller from the PE13 pin of the first stm32f407 control chip and is used for receiving the pulse width modulation waveform generated by the first stm32f407 controller, and an Vout pin outputs the amplified pulse width modulation waveform, and the amplified pulse width modulation waveform is connected with an exciting coil on the probe 5 after decoupling and filtering.
The working principle of the invention is as follows: the controller 1 controls a general timer in the chip to generate a pulse width modulation waveform, namely a PWM wave through a first stm32f407, and the PWM wave is amplified by the power amplifier 7 to drive the exciting coil; the Hall sensor collects a composite magnetic field of the secondary magnetic field and the primary magnetic field and converts the composite magnetic field into an electric signal, and if a test piece is defective or damaged, the composite magnetic field contains defect or damage information of the test piece; after the electric signal converted by the synthetic magnetic field is converted into a digital signal through a 12-bit A/D converter in the first stm32f407 control chip, the digital signal is transmitted to the coordination node 3 through a wireless sensing mode by the routing node 2, and then the coordination node 3 transmits the signal to the upper computer 4 through a USART serial port communication mode; the routing node 2 and the coordination node 3 are communicated through a ZigBee network.
The invention has the beneficial effects that: zigBee wireless network communication is adopted in a production workshop, so that the trouble of wiring is avoided, and the upgrading and the maintenance are easy; the defects and damage conditions of the test piece on the production line in the production workshop can be timely and effectively obtained remotely; the cost is saved, the damage probability of wired equipment is avoided, the management efficiency is improved, great convenience is brought to the detection of production test pieces, and the labor cost is saved; the device has the advantages of small volume, convenient operation, better popularization and certain application value.
Drawings
FIG. 1 is a schematic overall layout of an embodiment of the present invention;
FIG. 2 is a system block diagram of the present invention;
fig. 3 is a circuit diagram of the controller 1 of the present invention;
FIG. 4 is a diagram of a system power management circuit 8 according to the present invention;
fig. 5 is a circuit diagram of the power amplifier 7 of the present invention;
FIG. 6 is a circuit diagram of a Hall magnetic sensor of the present invention;
fig. 7 is a circuit diagram of the signal conditioning module 6 of the present invention;
fig. 8 is a circuit diagram of the ZigBee chip CC2430 of the present invention;
fig. 9 is a communication schematic diagram of the ZigBee chip CC2430 and stm32f407 control chip according to the present invention.
The reference numerals in the figures are: the system comprises a 1-controller, a 2-routing node, a 3-coordination node, a 4-upper computer, a 5-probe, a 6-signal conditioning circuit, a 7-power amplifier, an 8-power management circuit, a 9-reset circuit 9, a 10-second ZigBee chip CC2430 and a 11-second stm32f407 control chip.
Detailed Description
The invention will be further described with reference to the drawings and detailed description.
Example 1: as shown in fig. 1-9, the pulse eddy current nondestructive testing system based on the ZigBee technology comprises an array detector, a signal conditioning circuit 6, a power amplifier 7, a controller 1, a routing node 2, a coordination node 3 and an upper computer 4, wherein the array detector is a semi-cylinder surrounded by a plurality of probes 5, the appearance is tunnel-shaped, the probe 5 does not move along with the movement of the assembly line on an assembly line, the probes 5 comprise enameled wires, manganese-zinc ferrite cores and hall magnetic sensor circuits, the enameled wires are wound on the manganese-zinc ferrite cores to form an excitation coil, circuit boards of the hall magnetic sensor circuits are tightly attached to the bottoms of the manganese-zinc ferrite cores and are parallel to a horizontal plane, the controller 1 comprises a first stm32f407 control chip, the routing node 2 comprises a first ZigBee chip CC2430, and the coordination node 3 comprises a second stm32f407 control chip 11 and a second ZigBee chip CC243010;
the probe 5 is used for detecting a tested piece passing through the lower part of the probe 5, the input end of the probe is connected with the output end of the power amplifier 7, the output end of the probe is connected with the input end of the signal conditioning circuit 6, the output end of the signal conditioning circuit 6 is connected with the input end of the controller 1, the output end of the controller 1 is respectively connected with the input end of the power amplifier 7 and the first ZigBee chip CC2430 in the routing node 2, the controller 1 generates PWM waves through a universal timer in the first stm32f407 control chip, the PWM waves are amplified by the power amplifier 7 to drive the exciting coil, the first ZigBee chip CC2430 is in wireless communication with the second ZigBee chip CC243010 in the coordination node 3 through a wireless radio frequency antenna, the second ZigBee chip CC243010 is connected with the second stm32f407 control chip 11, and the second stm32f407 control chip 11 is connected with the upper computer 4. In the invention, the first ZigBee chip and the second ZigBee chip CC243010 have the same structure, and the first stm32f407 control chip and the second stm32f407 control chip 11 have the same structure.
And placing a plurality of probes 5 on a workshop assembly line according to actual conditions to form an array detector. The array detector is in a semi-cylindrical shape and is supported on the pipeline like a tunnel, and the array detector is fixed and does not move along with the movement of the pipeline. When the test piece passes below the detector, the defect and damage condition inside the whole test piece can be conveniently detected. Because the stm32f407 has 3 analog-to-digital conversion controllers with 12 bits therein, each analog-to-digital conversion controller has 16 channels, and each channel corresponds to one input/output port, the output end of each probe 5 can be conveniently connected to the signal conditioning circuit 6, and then each output end of the signal conditioning circuit 6 is respectively connected to each analog-to-digital conversion channel of the first stm32f407 control chip.
Further, the enameled wire with the diameter of 0.3mm is wound on the manganese-zinc ferrite core to form an exciting coil with the inner diameter of 5mm, the outer diameter of 25mm and the height of 20mm, and the Hall sensor circuit adopts a patch type linear Hall element HAL49E. The specific manufacturing method is that an enamelled wire with the wire diameter of 0.3mm is wound on a manganese-zinc ferrite to form a cylindrical excitation coil with the inner diameter of 5mm, the outer diameter of 25mm and the height of 20mm, and a linear patch linear Hall magnetic sensor circuit is horizontally arranged below the ferrite. The input end of the linear patch Hall sensor circuit is added with a bypass capacitor and a decoupling capacitor to reduce power supply noise, and the output end is provided with a small resistor to feed back and reduce noise; according to the output characteristics of the Hall element, a sliding rheostat is arranged around the Hall element, and the sliding rheostat is adjusted to enable the output voltage of the probe at the initial moment to be zero.
Further, the signal conditioning circuit includes: the filter circuit adopts a second-order RC active low-pass filter, R14 and C3 form a first-order low-pass filter circuit, R15 and C4 form a second-order low-pass filter circuit, the filtered circuit enters a UA741CD amplifying circuit, two first-order low-pass filter circuits are connected with a UA741CD operational amplifier in series, the output port of the UA741CD operational amplifier is connected with the controller 1, and the UA741CD amplifying circuit in the filter has the characteristics of high input impedance and low output impedance, so that the circuit can amplify useful signal frequency while filtering; the filter circuit is also provided with a feedback network, the effect of the feedback network is that the output voltage can be automatically regulated to the amplifying circuit through the feedback element, thereby restricting the change of the output voltage, and finally achieving stable and balanced output, and the filter has the advantages that: the device has the advantages of small volume, light weight and no need of magnetic shielding, and has the functions of filtering, amplifying and remote transmitting signals, and can be matched with a sensor for use, so that the adaptability and the environmental reliability of the system can be improved; the amplifying circuit is composed of three operational amplifier differential amplifying circuits, two OPA335 chips form a differential amplifying part, and then one UA741CD amplifying circuit is connected in series, two output ends of the probe 5 are respectively connected with the positive and negative ends of the two OPA335 amplifiers for differential amplification, and the symmetry and negative feedback effects of the differential amplifying circuits are utilized to effectively stabilize the static working point.
The second stm32f407 control chip 11 in the coordination node 3 and the second ZigBee chip CC243010 communicate through a USART serial port, the routing node 2 and the coordination node 3 communicate wirelessly through a radio frequency antenna, the second stm32f407 control chip 11 of the coordination node 3 receives a signal sent by the routing node 2, and then the signal is transmitted into a memory of the second stm32f407 control chip 11 of the coordination node 3, and then the second stm32f407 control chip 11 sends to an upper computer.
The serial port pins TX and RX of the first stm32f407 control chip are respectively connected with the serial port pins RX and TX of the first ZigBee chip CC2430, and the serial port pins TX and RX of the second stm32f407 control chip 11 are respectively connected with the serial port pins RX and TX of the second stm32f407 control chip 11.
As shown in fig. 3: the controller 1 further comprises a crystal oscillator, a reset circuit 9, a USB circuit, a standby battery, a JTAG circuit, a FLASH memory circuit and a power management circuit 8, wherein the USB circuit is used for downloading programs into a chip, the USB circuit adopts a CH340G chip, the USB circuit and a first stm32f407 control chip carry out data transmission through a USART1, TX and RX pins of the CH340G chip are respectively connected with U1 TX and U1 RX pins of the first stm32f407 control chip, and U1 TX and U1 RX pins of the first stm32f407 control chip are respectively connected with common input and output ports PA10 and PA11 of the first stm32f407 control chip, namely: common input/output ports PA10 and PA11 of the first stm32f407 control chip can be port-multiplexed into receiving/transmitting pins of the serial port 1, namely U1_TX and U1_RX through software initialization, the power management circuit 8 comprises a 5V direct current voltage input circuit and a 5V to 3.3V circuit, the 5V direct current voltage input circuit adopts an MP2359 chip, the 5V to 3.3V circuit adopts an AMS1117 chip, 12 parallel-connected 104 capacitors are connected between a power supply and the ground, the FLASH memory circuit adopts a W25Q128 chip, the W25Q128 chip and the first stm32f407 control chip are communicated in a SPI serial mode, a CLK pin, an SI pin and an SO pin of the W25Q128 chip are respectively connected to SPI1_SCK, SPI1_MOSI and SPI1_MISO pin of the first stm32f407 control chip, the JTAG circuit is used for online debugging of programs, and the first stm32f407 control chip is provided with JTAG ports.
Further, as shown in fig. 5, the power amplifier 7 employs an LM386 module, the maximum gain reaches 200, the INPUT pin of the LM386 module is grounded, the +input pin receives the pwm waveform generated by the control chip of the first stm32f407, the output port Vout pin is connected to a filter capacitor c33 and a decoupling capacitor c34, the filter capacitor c33 is used for filtering the ac component of the output signal, and then is connected to an exciting coil, and the decoupling capacitor c34 is used for compensating the high frequency defect of the filter capacitor, so that the linearity of the output signal is better.
As shown in fig. 4: the power management circuit 8 comprises a 5V direct current voltage input circuit and a 5V-to-3.3V circuit. The 5V direct current voltage input circuit adopts an MP2359 chip, the 5V-to-3.3V circuit adopts an AMS1117 chip, and 12 parallel 104 capacitors are connected between a power supply and the ground. The switch of the circuit power supply is controlled by the BUTTON key, so that the circuit is quite convenient. The first stm32f407 control chip and the second stm32f407 control chip are connected with a power management circuit 8 and a reset circuit 9, and the power management circuit 8 supplies power to all the chips.
As shown in fig. 6: the linear-linear hall magnetic sensor circuit is constituted by a patch-type linear hall element HAL49E and an output circuit. The input end of the linear patch Hall sensor circuit is added with a bypass capacitor and a decoupling capacitor to reduce power supply noise, and the output end is provided with a small resistor to feed back and reduce noise; according to the output characteristics of the Hall element, a sliding rheostat is arranged at the input end of the Hall element, and the sliding rheostat is adjusted to enable the output voltage of the probe at the initial moment to be zero.
As shown in fig. 8: the CC2430 radio frequency module with low power consumption of CC2430 is composed of CC2430 chips of TI company, can be widely applied to the field of short-distance wireless communication, can be controlled by commands, and can be used for configuring serial port baud rate and modifying ZigBee network parameters through the role of a serial port switching module. The ZigBee module and the stm32f407 chip are communicated through a USART serial port, and pins P0.2 and P0.3 of the ZigBee module are RXD and TXD pins of the serial port USART, and are respectively connected to a PA9 pin and a PA10 pin of the stm32f407 chip in the system, because the two pins are a TX pin and a RX pin of the serial port USART1 of the stm32f407 chip; and the RF_p and RF_n pins of the ZigBee chips are connected with radio frequency antennas, and wireless communication of the two ZigBee chips is realized through the radio frequency antennas.
In actual work, according to the actual condition of a factory workshop, an array detector formed by a plurality of probes 5 is placed on a workshop assembly line, the array detector is semi-cylindrical, and the array detector is arranged on the assembly line like a tunnel, so that the probes can completely wrap a test piece. The array detector is stationary and does not move with the movement of the pipeline. When the test piece passes below the detector, the defect and damage condition inside the whole test piece can be conveniently detected. The test piece is transported on the belt of the assembly line through the array detector, and the array detector sweeps the test piece to detect defects and damage conditions in the whole test piece. Because the stm32f407 chip is internally provided with four channels except the general timers 9-14, one channel can generate pulse width modulation signals, namely PWM waveforms, by setting corresponding registers, and each channel of the timer corresponds to one I/O port, the I/O port outputting the PWM waveforms can be connected with the INPUT port +INPUT of the power amplifier, the-INPUT pin of the power amplifier is grounded, and the PWM waveforms are amplified in the power amplifier; the Vout output pin of the power amplifier 7 is connected with the excitation coil end of the probe 5, so that the amplified PWM waves drive the excitation coil; after the amplified PWM waves drive the exciting coil, an electromagnetic field generated around the exciting coil is formed by superposition of two parts: one part is a primary electromagnetic field which is directly coupled out from the coil and is also called a primary magnetic field, and the other part is a secondary electromagnetic field which is generated by an eddy current field induced in the test piece and is also called a secondary magnetic field. Each sensor part of the matrix probe collects the synthesized magnetic field of the secondary magnetic field and the primary magnetic field and converts the synthesized magnetic field into an electric signal; the output end of the probe is connected with two ends of an integrated differential amplifying part of the signal conditioning circuit, and amplification and twice low-pass filtering are carried out in the signal conditioning circuit 6; because the stm32f407 chip is internally provided with 3 12-bit ADC controllers, each controller comprises 16 channels, each channel corresponds to one I/O pin, the output port of each signal conditioning circuit 6 is respectively connected with each channel of the A/D controller of the first stm32f407 control chip, amplified and filtered analog signals are transmitted from the output port of the signal conditioning circuit to the first stm32f407 control chip, and the analog signals are subjected to analog-to-digital conversion in the 12-bit A/D converter of the first stm32f407 control chip. The converted digital signals are controlled by the controller 1 to be transmitted to the coordination node 3 through the routing node 2, and then the coordination node 3 transmits the signals to the upper computer 4.
After the power-on, the coordination node 3 automatically establishes a ZigBee wireless ad hoc network, and each probe 5 automatically joins the network to complete the networking. For the first time, the coordination node 3 can enter a setting interface through key selection, and parameters such as a threshold value, a sampling frequency, a sending frequency and the like are input according to requirements. After the setting is correct, the controller 1 generates a rectangular pulse signal, the rectangular pulse signal acts on the exciting coil through the power amplifier 7, the probe periodically collects parameters of a workshop test piece, the parameters are transmitted to the coordination node 3 through the routing node 2, and after the coordination node 3 synthesizes all data, defect and damage information of the test piece is sent to the upper computer 4 for storage, analysis and display. When the defect and damage degree of the test piece reaches the maximum value required by the user, the controller 1 can automatically send out an alarm instruction. An operator can remotely and timely acquire the equipment conditions in the workshop through upper computer software, and can remotely control and monitor the system in a key command mode.
The ZigBee technology is a bidirectional wireless communication technology with low power consumption, low cost and high data reliability, and is mainly used in the fields of automatic and remote control. According to the actual condition of a factory workshop, a plurality of probes are placed on a workshop assembly line to form an array detector. The array detector is semi-cylindrical and is like a tunnel and is arranged on the pipeline, and the array detector does not move along with the movement of the pipeline. When the test piece passes through the lower part of the array detector, the defect and damage condition in the whole test piece can be conveniently detected, and the problems in the current detection technology are well solved. The array detector is placed on the factory workshop assembly line to realize on-line monitoring, and the ZigBee wireless transmission technology is adopted, so that the detection efficiency is improved, the cost is saved, the damage probability of wired equipment is avoided, and the management efficiency is also improved.
While the present invention has been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (5)
1. A pulse eddy current nondestructive testing system based on ZigBee technology is characterized in that: the intelligent sensor comprises an array detector, a signal conditioning circuit (6), a power amplifier (7), a controller (1), a routing node (2), a coordination node (3) and an upper computer (4), wherein the array detector is a semi-cylinder surrounded by a plurality of probes (5), the appearance is in a tunnel shape, the probes are erected on a production line and do not move along with the movement of the production line, the probes (5) comprise enameled wires, manganese-zinc ferrite cores and Hall magnetic sensor circuits, the enameled wires are wound on the manganese-zinc ferrite cores to form excitation coils, circuit boards of the Hall magnetic sensor circuits are tightly attached to the bottoms of the manganese-zinc ferrite cores and are placed parallel to a horizontal plane, the controller (1) comprises a first stm32f407 control chip, the routing node 2 comprises a first ZigBee chip CC2430, the coordination node 3 comprises a second stm32f407 control chip 11 (11) and a second ZigBee chip CC243010 (10);
the probe (5) is used for detecting a tested piece passing through the lower part of the probe, the input end of the probe is connected with the output end of the power amplifier (7), the output end of the probe is connected with the input end of the signal conditioning circuit (6), the output end of the signal conditioning circuit (6) is connected with the input end of the controller (1), the output end of the controller (1) is respectively connected with the input end of the power amplifier (7) and a first ZigBee chip CC2430 in the routing node (2), the controller (1) generates PWM waves through a universal timer in the first stm32f407 control chip, the PWM waves drive an excitation coil through the amplification of the power amplifier (7), the first ZigBee chip CC2430 is in wireless communication with a second ZigBee chip CC243010 (10) in the coordination node (3), the second ZigBee chip CC243010 (10) is connected with a second stm32f407 control chip 11 (11), and the second stm32f control chip 11 (11) is connected with the upper computer (4);
the signal conditioning circuit includes: the filtering circuit adopts a second-order RC active low-pass filter, R14 and C3 form a first-order low-pass filter circuit, R15 and C4 form a second-order low-pass filter circuit, the filtered circuit enters a UA741CD amplifying circuit, two first-order low-pass filter circuits are connected with a UA741CD operational amplifier in series, the output port of the UA741CD operational amplifier is connected with the controller 1, the amplifying circuit is formed by a three-operational-amplifier differential amplifying circuit, two OPA335 chips form a differential amplifying part, and then the UA741CD amplifying circuit is connected in series, and two output ends of a probe (5) are respectively connected with the positive end and the negative end of the two OPA335 amplifiers for differential amplification;
the second stm32f407 control chip 11 (11) and the second ZigBee chip CC243010 (10) in the coordination node (3) are communicated through a USART serial port.
2. The pulse eddy current nondestructive testing system based on the ZigBee technology according to claim 1, wherein: the enameled wire with the diameter of 0.3mm is wound on the manganese-zinc ferrite core to form an exciting coil with the inner diameter of 5mm, the outer diameter of 25mm and the height of 20mm, and the Hall sensor circuit adopts a patch type linear Hall element HAL49E.
3. The pulse eddy current nondestructive testing system based on the ZigBee technology according to claim 1, wherein: the serial port pins TX and RX of the first stm32f407 control chip are respectively connected with the serial port pins RX and TX of the first ZigBee chip CC2430, and the serial port pins TX and RX of the second stm32f407 control chip 11 (11) are respectively connected with the serial port pins RX and TX of the second stm32f407 control chip 11 (11).
4. The pulse eddy current nondestructive testing system based on the ZigBee technology according to claim 1, wherein: the controller 1 also comprises a crystal oscillator, a reset circuit (9), a USB circuit, a standby battery, a JTAG circuit, a FLASH memory circuit and a power management circuit (8), wherein the USB circuit is used for downloading programs into a chip, the USB circuit adopts a CH340G chip, the USB circuit and a first stm32f407 control chip are used for data transmission through a USART1, TX and RX pins of the CH340G chip are respectively connected with U1-TX and U1-RX pins of the first stm32f407 control chip, U1-TX and U1-RX pins of the first stm32f407 control chip are respectively connected to common input output ports PA10 and PA11 of the first stm32f407 control chip, the power management circuit (8) comprises a 5V direct current voltage input circuit and a 5V to 3.3V circuit, the 5V direct current voltage input circuit adopts an MP2359 chip, the 5V to 3.3V circuit adopts a W25Q chip, the W25Q chip is used for the FLASH memory circuit, the W25Q chip is respectively connected with the first stm32f407 control chip through the W128 and SPI 128, and SPI 1-SPI pin of the first stm32f407 control chip is respectively connected to the first stm32f407 control chip.
5. The pulse eddy current nondestructive testing system based on the ZigBee technology according to claim 1, wherein: the power amplifier (7) adopts an LM386 module, the maximum gain reaches 200, an-INPUT pin of the LM386 module is grounded, a +INPUT pin receives connection from a PE13 pin of a first stm32f407 control chip and is used for receiving a pulse width modulation waveform generated by a first stm32f407 controller, and an Vout pin outputs the amplified pulse width modulation waveform and is connected with an excitation coil on a probe (5) after decoupling and filtering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710584788.9A CN107271544B (en) | 2017-07-18 | 2017-07-18 | Pulse eddy current nondestructive testing system based on ZigBee technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710584788.9A CN107271544B (en) | 2017-07-18 | 2017-07-18 | Pulse eddy current nondestructive testing system based on ZigBee technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107271544A CN107271544A (en) | 2017-10-20 |
| CN107271544B true CN107271544B (en) | 2023-07-18 |
Family
ID=60078782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710584788.9A Active CN107271544B (en) | 2017-07-18 | 2017-07-18 | Pulse eddy current nondestructive testing system based on ZigBee technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107271544B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108375629A (en) * | 2018-01-30 | 2018-08-07 | 昆明理工大学 | A kind of pulsed eddy-current nondestructive test system based on flexible PCB technology |
| CN108362934A (en) * | 2018-04-18 | 2018-08-03 | 昆明理工大学 | A kind of buried steel pipe scramble current monitoring system and method based on GPRS |
| CN109633233A (en) * | 2018-12-21 | 2019-04-16 | 华为数字技术（苏州）有限公司 | A kind of Closed Loop Hall and detection method |
| CN110068609A (en) * | 2019-05-31 | 2019-07-30 | 中国计量大学 | A kind of compound bearing device inside fault detection system of the ultrasonic accurate measurement of leakage field Rough Inspection combination |
| CN110231397A (en) * | 2019-06-18 | 2019-09-13 | 中国石油大学(华东) | A kind of multichannel impulse eddy current on-line monitoring system and monitoring method |
| CN112179990A (en) * | 2020-09-15 | 2021-01-05 | 昆明理工大学 | Carbon fiber composite material fatigue damage probability imaging method based on ToF damage factor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204718990U (en) * | 2015-05-12 | 2015-10-21 | 西安建筑科技大学 | Wireless water quality monitoring system |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7385392B2 (en) * | 2000-11-13 | 2008-06-10 | Jentek Sensors, Inc. | Eddy current sensing arrays and system |
| CN103105204A (en) * | 2013-01-18 | 2013-05-15 | 中国计量学院 | Refrigerator wireless energy efficiency test system based on ZigBee technology |
| WO2014189624A1 (en) * | 2013-05-20 | 2014-11-27 | Silicon Biodevices, Inc. | Digital control of on-chip magnetic particle assay |
| US9267877B2 (en) * | 2014-03-12 | 2016-02-23 | Nxgen Partners Ip, Llc | System and method for making concentration measurements within a sample material using orbital angular momentum |
| US9465008B2 (en) * | 2014-06-13 | 2016-10-11 | General Electric Company | Method and system for eddy current device dynamic gain adjustment |
| US9945919B2 (en) * | 2014-10-09 | 2018-04-17 | Siemens Healthcare Gmbh | Systems and methods for real time gradient timing modification |
| CN104853485A (en) * | 2015-04-20 | 2015-08-19 | 吉首大学 | Intelligent road illumination and monitoring system based on ZigBee and 4G technology |
| US20170059527A1 (en) * | 2015-09-01 | 2017-03-02 | Corestar International Corporation | Hand-Held Eddy Current Test Instrument and Sensor |
| CN205428173U (en) * | 2015-12-18 | 2016-08-03 | 西北师范大学 | Ecological water literary composition data acquisition system based on zigBee |
| CN106596713A (en) * | 2016-11-23 | 2017-04-26 | 电子科技大学 | Nondestructive testing probe system with high signal-to-noise ratio |
| CN207351959U (en) * | 2017-07-18 | 2018-05-11 | 昆明理工大学 | A kind of pulsed eddy-current nondestructive test system based on ZigBee technology |
-
2017
- 2017-07-18 CN CN201710584788.9A patent/CN107271544B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204718990U (en) * | 2015-05-12 | 2015-10-21 | 西安建筑科技大学 | Wireless water quality monitoring system |
Non-Patent Citations (2)
| Title |
|---|
| Ｚｉ ｇ Ｂｅ ｅ技术在塔吊安全监测预警系统中的应用;张青春 等;《计算机测量与控制》;第2615-2621页 * |
| 无线传感网络技术及其在结构健康监控应用中的关键问题;颜彦 等;《2011年远东无损检测论坛论文精选》;第43-50页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107271544A (en) | 2017-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107271544B (en) | Pulse eddy current nondestructive testing system based on ZigBee technology | |
| CN103970117B (en) | MCU chip detection method and circuit | |
| CN108988509A (en) | Ambient radio-frequency energy collection management and wireless environment parameter acquisition devices and method | |
| CN105391422B (en) | Phased array probe Adaptive impedance matching system and method based on ZigBee technology | |
| CN107389737A (en) | A kind of soil parameters measurement apparatus | |
| CN101315361B (en) | Detection system and method based on wireless network type salinity and temperature | |
| CN102818934A (en) | Direct-current resistance measuring circuit for inductor | |
| CN101329408B (en) | Receiver of underground metal pipeline detector | |
| CN204903747U (en) | Wireless monitoring formula voltage transformer detection device | |
| CN103713243B (en) | 10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array | |
| CN110058089A (en) | A kind of probe measuring transient electromagnetic field | |
| CN201666927U (en) | Spatial and tridimensional electromagnetic interference instrument based on single chip micro-computer | |
| CN212363301U (en) | Data acquisition device for on-line monitoring of capacitive equipment | |
| CN205720433U (en) | A kind of Distribution Network Harmonics on-Line Monitor Device based on radio sensing network | |
| CN206290980U (en) | A kind of gas ductwork leaks transient pressure ripple Real-time Collection module | |
| CN207351959U (en) | A kind of pulsed eddy-current nondestructive test system based on ZigBee technology | |
| CN110907042B (en) | Transformer temperature rise monitoring device and system | |
| CN104597359A (en) | Networking-supportive electric energy measuring completion acceptance device | |
| CN206671580U (en) | Nuclear magnetic resonance based on array inversion charging visits water emitter | |
| CN211402699U (en) | Novel intelligent electric energy meter field calibration instrument | |
| CN213637201U (en) | Current measuring device and power grid monitoring system | |
| CN204129211U (en) | A kind of base passive and wireless multi-parameter sensor intelligent electric energy meter temperature rise detecting device | |
| CN207540665U (en) | Equipment working condition detection device and system | |
| CN206788389U (en) | A kind of nuclear magnetic resonance water detector is precisely program control to match somebody with somebody humorous device | |
| CN212134877U (en) | Circuit for detecting charging current of wireless charger mainboard |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240605 Address after: 653405 Jia Sa Avenue, Jia Sa Town, Xinping Yi and Dai Autonomous County, Yuxi City, Yunnan Province Patentee after: YUNNAN DAHONGSHAN PIPELINE Ltd. Country or region after: China Address before: 650093 No. 253, Xuefu Road, Wuhua District, Yunnan, Kunming Patentee before: Kunming University of Science and Technology Country or region before: China |