NL2032869B1 - Stress detection system based on different magnetic transmission media - Google Patents
Stress detection system based on different magnetic transmission media Download PDFInfo
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- NL2032869B1 NL2032869B1 NL2032869A NL2032869A NL2032869B1 NL 2032869 B1 NL2032869 B1 NL 2032869B1 NL 2032869 A NL2032869 A NL 2032869A NL 2032869 A NL2032869 A NL 2032869A NL 2032869 B1 NL2032869 B1 NL 2032869B1
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- chip microcomputer
- interrupt
- input port
- output port
- routine
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- 238000001514 detection method Methods 0.000 title claims abstract description 26
- 230000005540 biological transmission Effects 0.000 title claims abstract description 9
- 238000003860 storage Methods 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 238000013480 data collection Methods 0.000 description 8
- 230000000875 corresponding effect Effects 0.000 description 5
- 239000011888 foil Substances 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 3
- 229910052755 nonmetal Inorganic materials 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000003340 mental effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
- G11C29/56—External testing equipment for static stores, e.g. automatic test equipment [ATE]; Interfaces therefor
- G11C29/56016—Apparatus features
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
- G11C29/04—Detection or location of defective memory elements, e.g. cell constructio details, timing of test signals
- G11C29/08—Functional testing, e.g. testing during refresh, power-on self testing [POST] or distributed testing
- G11C29/48—Arrangements in static stores specially adapted for testing by means external to the store, e.g. using direct memory access [DMA] or using auxiliary access paths
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
- G11C29/56—External testing equipment for static stores, e.g. automatic test equipment [ATE]; Interfaces therefor
- G11C29/56008—Error analysis, representation of errors
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
- G11C29/56—External testing equipment for static stores, e.g. automatic test equipment [ATE]; Interfaces therefor
- G11C2029/5602—Interface to device under test
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Abstract
A stress detection system based on different magnetic transmission media includes a single—chip microcomputer, a step motor signal collection system. capable of changing a medium. environment, a magnetic sensor, a force sensor, an Analog/Digital (A/D) converter, a memory expansion part, and a reset interrupt control part, wherein structural main points are as follows: a detection signal output port of the sensor is connected. to a detection signal input port of the A/D converter; a detection signal output port of the A/D converter is connected to a detection signal input port of the single—chip microcomputer; a signal output port of the single—chip microcomputer is connected to a signal input port of the step motor signal collection system. capable of changing a medium environment; and a reset signal input port of the single— chip microcomputer is connected to a reset signal output port of a reset part.
Description
P1537 /NLpd
STRESS DETECTION SYSTEM BASED ON DIFFERENT MAGNETIC TRANSMISSION
MEDIA
The present invention belongs to the field of researches on properties of magnetic memory signals of metals, and relates to a stress detection system based on different magnetic transmission media.
With the development of modern productivity, metals have been applied to all areas of people's life, but the economic loss caused by the damage of the metals is also increasing year by year. However, general non-destructive detection techniques can only detect cracks or defects that have already formed, but cannot perform early detection on fatigue damage caused by stress concen- tration. At present, there is no special and systematic experi- mental device for related theoretical research on magnetic memory, which also affects the progress of the theoretical research on the magnetic memory to varying degrees.
For the above-mentioned problems, a stress detection system based on different transmission media is provided.
The stress detection system includes a single-chip microcom- puter, a step motor signal collection system capable of changing a medium environment, a magnetic sensor, a force sensor, an Ana- log/Digital (A/D) converter, a memory expansion part, and a reset interrupt control part, wherein structural main points are as fol- lows: a detection signal output port of the sensor is connected to a detection signal input port of the A/D converter; a detection signal output port of the A/D converter is connected to a detec- tion signal input port of the single-chip microcomputer; a signal output port of the single-chip microcomputer is connected to a signal input port of the step motor signal collection system capa-
ble of changing a medium environment; a reset signal input port of the single-chip microcomputer is connected to a reset signal out- put port of a reset part; an interrupt signal input port of the single-chip microcomputer is connected to an interrupt signal out- put port of an external interrupt part; and a storage signal out- put port of the single-chip microcomputer is connected to a stor- age signal input port of an external parameter memory.
Routines of the single-chip microcomputer include a system invoking main routine, and a step motor two-channel data collec- tion subroutine used as an interrupt service routine.
The system main routine adopts an assembler pseudo instruc- tion to set an AUDB as a first address for storing magnetic signal experimental data, and to set an AUDF as a first address for stor- ing a force signal experimental data.
The system main routine first enables register pointer RO to point to the first address AUDB for storing magnetic signal exper- imental data, enables register pointer Rl to point to the first address AUDF for storing a force signal experimental data, and adds a delay waiting routine of an 'endless loop' for waiting for interrupt control.
When pin INTO is '0', an interrupt service subroutine is exe- cuted; in the interrupt service routine, the "site of the routine" and a "breakpoint" are first protected; the interrupt service sub- routine is then opened and executed; the subroutine is closed af- ter being executed; and the "site of the routine" and the "break- point” are recovered to continue to execute the main routine.
The present disclosure has the beneficial effects:
The present invention solves the problem of experimental re- search on magnetic memory properties by changing an external transmission medium environment. A magnetic signal is collected by the step motor signal collection system capable of changing a transmission medium environment, so that anti-interference capaci- ty of the external transmission medium environment and data col- lection is greatly improved. The hall sensor and a foil strain gauge are used to simultaneously collect magnetic and mechanical signals, and an external memory is used to perform real-time cor- responding storage on experimental data, which is convenient for later comparative analysis of the experimental data. The single- chip microcomputer is used for control and assembly language pro- gramming, so that experimental equipment is smaller in size and easily meets the requirements of various experimental environ- ments.
FIG. 1 is a flow chart of a system main routine.
FIG. 2 is a flow chart of an interrupt service routine.
FIG. 3 is a flow chart of a step motor two-channel data col- lection subroutine.
FIG. 4 is a schematic diagram of a product.
FIG. 5 is an external structural diagram of a product.
FIG. 6 is a structural diagram of a hall sensor.
FIG. 7 is a structural diagram of a foil strain gauge.
FIG. 8 is a structural diagram of a stress sensor.
FIG. 9 is a circuit diagram of a data collection system.
FIG. 10 is a memory expansion circuit diagram.
FIG. 11 is a circuit diagram of connection between a step mo- tor and a single-chip microcomputer.
FIG. 12 is a reset system and interrupt control circuit dia- gram.
As shown in FIG. 5, a stress detection system includes a sin- gle-chip microcomputer, a step motor signal collection system ca- pable of changing a medium environment, a magnetic sensor, a force sensor, an Analog/Digital (A/D) converter, a memory expansion part, and a reset interrupt control part, wherein structural main points are as follows: a detection signal output port of the sen- sor is connected to a detection signal input port of the A/D con- verter; a detection signal output port of the A/D converter is connected to a detection signal input port of the single-chip mi- crocomputer; a signal output port of the single-chip microcomputer is connected to a signal input port of the step motor signal col- lection system capable of changing a medium environment; a reset signal input port of the single-chip microcomputer is connected to a reset signal output port of a reset part; an interrupt signal input port of the single-chip microcomputer is connected to an in- terrupt signal output port of an external interrupt part; and a storage signal output port of the single-chip microcomputer is connected to a storage signal input port of an external parameter memory.
Routines of the single-chip microcomputer include a system invoking main routine, and a step motor two-channel data collec- tion subroutine used as an interrupt service routine.
The system main routine adopts an assembler pseudo instruc- tion to set an AUDB as a first address for storing magnetic signal experimental data, and to set an AUDF as a first address for stor- ing a force signal experimental data.
As shown in FIG. 1, the system main routine first enables register pointer RO to point to the first address AUDB for storing magnetic signal experimental data, enables register pointer Rl to point to the first address AUDF for storing a force signal experi- mental data, and adds a delay waiting routine of an 'endless loop! for waiting for interrupt control.
As shown in FIG. 2, when pin INTO is '0', an interrupt ser- vice subroutine is executed; in the interrupt service routine, the "site of the routine" and a "breakpoint" are first protected; an interrupt is then enabled; the interrupt is disabled after the in- terrupt service subroutine is executed; the "site of the routine" and the "breakpoint" are recovered to continue to execute the main routine.
As shown in FIG. 3, when pin INTO is '0', the step motor two- channel data collection subroutine puts step motor clockwise rota- tion table first address TABLE into a data pointer DPTR; content of register R2 is set to be '0'; the content of register R2 is put into register A and used as a pointer offset; pointing content of pointer DPTR+A is taken out and put into register A, that is, an output value required by the first step of rotation of a step mo- tor; if the value in register A is output from port Pl connected to the step motor, the step motor rotates one step; R2 points to- wards a next storage unit, and channel INO is turned on for A/D conversion; after delay for a period of time, a numerical value after conversion is put into an RO pointing area; pointer RO points to a next storage unit; channel IN1 is initiated for A/D conversion; after delay for a period of time, a numerical value after conversion is put into an Rl pointing area; pointer R1 5 points to a next storage unit; whether @R2 value is '4' is deter- mined; if not, the content of register R2 is put into register A and used as a pointer offset for a small loop; if yes, whether a large loop is performed for 10 times is determined; if not, con- tent of register R2 is set to be '0' for a large loop; if yes, the step motor stops rotation, that is, the @R2 content is plus 1; the content of register R2 is put into register A and used as a point- er offset; the pointing content of pointer DPTR+A is taken out and put into register A; and the value in register A is output by port
Pl connected to the step motor. In this way, after 4 small loops and 10 large loops, the step motor move forwards by 40 steps, and at the same time, magnetic and mechanical data collected by 40 times are stored in corresponding storage areas. This routine can achieve repeated collection for multiple times.
The single-chip microcomputer of the present invention adopts a chip 80C51.
As shown in FIG. 4, a tensile machine in the present inven- tion is used to apply a tensile force to a metal steel bar.
As shown in FIG. 4, in the present invention, the force sen- sor is attached in the middle of the metal steel bar for measure- ment.
As shown in FIG. 6, in the present invention, the magnetic sensor adopts a 49E hall sensor.
As shown in FIG. 7 and FIG. 8, in the present invention, the force sensor adopts a foil strain gauge which is connected to an electric bridge and is then shaped by a transmitter to serve as the force sensor.
As shown in FIG. 9, in the present invention, the A/D con- verter adopts a chip AD0809; port PO of a chip 80C51 is connected to data access port D of the chip AD0809; and ports AC, Al, and A2 of a chip 74LS373 are respectively correspondingly connected to ports A, B, and C of the chip AD0809.
Pin 13 of the chip 80C51 is connected to a second NOT gate output end; a second NOT gate input end is connected to port EOC of the chip AD0809; pin 16 of the chip 80C51 is connected to a first input end of a first AND gate; pin 21 of the chip 0C51 is respectively connected to a second input end of the first AND gate and a first input end of a second AND gate; and pin 17 of the chip 80C51 is connected to a second input end of the second AND gate.
An output end of the first AND gate is connected to an input end of a third NOT gate; an output end of the third NOT gate is respectively connected to port ST and port ALE of the chip AD0809; an output end of the second AND gate is connected to an input end of a fourth NOT gate; an output end of the fourth NOT gate is con- nected to port OE of the chip AD0809; and pin 30 of the chip 80C51 is connected to port CLK of the chip AD0809 through a median tak- ing circuit.
Port INO of the chip AD0809 is used as a signal access port connected to port C of the hall sensor; port A of the hall sensor is connected to a power supply; and port B of the hall sensor is grounded.
Port IN1 of the chip AD0809 is used as a signal access port connected to a signal output port of a foil strain gauge electric bridge.
As shown in FIG. 10, in the present invention, the memory ex- pansion part includes a chip 74LS373 and a chip HM628128RAM; pins 32 to 39 of the chip 80C51 are respectively correspondingly con- nected to pins 18, 17, 14, 13, 8, 7, 4, and 3 of the chip 74LS373; pins 32 to 39 of the chip 80C51 are respectively correspondingly connected to pins 21 to 13 of the chip HM628128RAM; pins 19, 16, 15, 12, 9, 6, 5, and 2 of the chip 74LS373 are respectively corre- spondingly connected to pins 5 to 12 of the chip HM628128RAM; and pins 17 and 18 of the chip 80C51 are respectively correspondingly connected to pins 24 and 29 of the chip HM628128RAM.
Pins 1 and 2 of the chip 80C51 are respectively correspond- ingly connected to pins 2 and 31 of the chip HM628128RAM; pins 27 to 21 of the chip 80C51 are respectively correspondingly connected to pins 3, 28, 4, 25, 23, 26, and 27 of the chip HM628128RAM; pin 22 of the chip HM628128RAM is connected to a decoding circuit; and pin 30 of the chip 80C51 is connected to pin 11 of the chip
74LS373.
As shown in FIG. 11, in the present invention, the step motor data collection part adopts a chip LUN2003; pins 1C, 2C, 3C, and 4C of the chip LUN2003 are respectively correspondingly connected to orange, brown, yellow and black pins of the step motor 20BY20H01; and pins 1B, 2B, 3B, and 4B of the chip LUN2003 are re- spectively correspondingly connected to pins P1.0, P1.1, P1.2, and
P1.3 of the chip 80C51. As shown in FIG. 4, an experimental medium is placed on a step motor trolley; the hall sensor is placed on the experimental medium; the step motor moves a distance on the metal steel bar, and a magnetic signal is scanned and recorded simultaneously, and magnetic signal data for changing an external medium environment can be recorded at the same time; and during scanning, the single-chip microcomputer records an obtained force signal at a corresponding position of a memory through the foil strain gauge on the metal steel bar. In this way, the system can perform scanning by controlling the step motor and the sensor, and record magnetic and mechanical comparison data values of the changed external medium environment.
The step motor of the present invention adopts a 6-wire con- nection method.
As shown in FIG. 12, the stress detection system is provided with two switches Kl and K2 which respectively control resetting of the system and data collection of the step motor; switch Kl is externally connected to one capacitor and one resistor to form an external reset system; and after the switch is connected in paral- lel to a 10uF capacitor, the switch is connected to port RES of the single-chip microcomputer 80C51 and is grounded via a 10K re- sistor, thus forming the reset system. That is, when button Kl is pressed, the system is reset for rework. Switch K2 is externally connected to one capacitor and one resistor to form an external interrupt system; and after switch K2 is connected in parallel to one 10uF capacitor, switch K2 is connected to port INTO of the single-chip microcomputer 80C51 via a NOT gate and is grounded via one 10K resistor, thus forming the interrupt system. That is, when
K2 is pressed, the system collects magnetic and mechanical sig- nals.
Optionally, in the present invention , a non-metal medium is placed between the sensor and a steel bar with a crack in the mid- dle; the tensile machine is used to apply a tensile force of 50
MPa to the steel bar; the magnetic signal data measured by the step motor signal collection system includes 8054nT, 8160nT, 8762nT, 9014nT, 8896nT, 8256nT, and 8078nT, and corresponding scanning positions are 0 mm, 20 mm, 40 mm, 60 mm, 80 mm, 100 mm, and 120 mm. It can be known from the experimental data that the magnetic signals increase significantly in a stress concentration area of the steel bar.
Optionally, in the present invention , a metal medium is placed between the sensor and a steel bar with a crack in the mid- dle; the tensile machine is used to apply a tensile force of 50
MPa to the steel bar; the magnetic signal data measured by the step motor signal collection system includes 9156nT, 9224nT, 9545nT, 9894nT, 9421nT, 9332nT, and 9015nT, and corresponding scanning positions are 0 mm, 20 mm, 40 mm, 60 mm, 80 mm, 100 mm, and 120 mm. It can be known from the experimental data that the magnetic signals are enhanced under the metal medium relative to the non-metal medium; and furthermore, in a stress concentration area of the steel bar, the magnetic signals still increase, but the increasing trend slows down compared with the increasing trend of the non-metal medium.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2032869A NL2032869B1 (en) | 2022-08-29 | 2022-08-29 | Stress detection system based on different magnetic transmission media |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2032869A NL2032869B1 (en) | 2022-08-29 | 2022-08-29 | Stress detection system based on different magnetic transmission media |
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| NL2032869B1 true NL2032869B1 (en) | 2024-03-12 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108776172A (en) * | 2018-05-31 | 2018-11-09 | 沈阳工业大学 | A kind of Magnetic Memory sound-light alarm method of step motor control motion scan |
| CN108802167A (en) * | 2018-05-31 | 2018-11-13 | 沈阳工业大学 | A kind of Magnetic Memory experimental provision of novel change external magnetic field environment |
| CN109003644A (en) * | 2018-05-31 | 2018-12-14 | 沈阳工业大学 | A kind of Magnetic Memory experimental provision of novel change external temperature environment |
| CN109540351A (en) * | 2018-12-03 | 2019-03-29 | 沈阳工业大学 | A kind of Magnetic Memory experimental provision for creating dynamic magnetic field environment |
| CN111610250A (en) * | 2020-07-06 | 2020-09-01 | 中石油西北联合管道有限责任公司 | Intelligent residual magnetism detection test device |
| CN108986870B (en) * | 2018-05-31 | 2021-04-27 | 沈阳工业大学 | Magnetic memory experimental device for changing external magnetic propagation medium environment |
-
2022
- 2022-08-29 NL NL2032869A patent/NL2032869B1/en active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108776172A (en) * | 2018-05-31 | 2018-11-09 | 沈阳工业大学 | A kind of Magnetic Memory sound-light alarm method of step motor control motion scan |
| CN108802167A (en) * | 2018-05-31 | 2018-11-13 | 沈阳工业大学 | A kind of Magnetic Memory experimental provision of novel change external magnetic field environment |
| CN109003644A (en) * | 2018-05-31 | 2018-12-14 | 沈阳工业大学 | A kind of Magnetic Memory experimental provision of novel change external temperature environment |
| CN108986870B (en) * | 2018-05-31 | 2021-04-27 | 沈阳工业大学 | Magnetic memory experimental device for changing external magnetic propagation medium environment |
| CN109540351A (en) * | 2018-12-03 | 2019-03-29 | 沈阳工业大学 | A kind of Magnetic Memory experimental provision for creating dynamic magnetic field environment |
| CN111610250A (en) * | 2020-07-06 | 2020-09-01 | 中石油西北联合管道有限责任公司 | Intelligent residual magnetism detection test device |
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