CN217571378U - High-precision height adjuster detection system - Google Patents
High-precision height adjuster detection system Download PDFInfo
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- CN217571378U CN217571378U CN202122505516.XU CN202122505516U CN217571378U CN 217571378 U CN217571378 U CN 217571378U CN 202122505516 U CN202122505516 U CN 202122505516U CN 217571378 U CN217571378 U CN 217571378U
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- 238000001514 detection method Methods 0.000 title claims abstract description 23
- 238000003698 laser cutting Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 3
- 238000011161 development Methods 0.000 abstract description 4
- 230000018109 developmental process Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005070 sampling Methods 0.000 description 9
- 239000013078 crystal Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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Abstract
The utility model provides a height regulator detecting system of high accuracy, include: a workpiece, a sensor, a cutting head, an electrode cable, a preamplifier, a sensor cable, an adjustor, a servo controller, a controller, and a linear drive component. In laser cutting applications, a sensor and preamplifier convert the cutting head height to a frequency signal, which is transmitted to an increaser. The height adjuster accurately detects an input frequency signal, and dynamically adjusts the height of the laser cutting head through the calibrated corresponding relation between the frequency and the height and the set cutting height to form fixed height floating so as to perform stable cutting. The beneficial effects of the utility model are that: the problem of developments decide height unsteady is solved for the cutting plane is level and smooth, and has reduced the probability of hitting the laser cutting head, has improved cutting head height detection precision and height adjustment precision.
Description
Technical Field
The utility model relates to a laser cutting field especially relates to a height adjuster detecting system of high accuracy.
Background
With the continuous improvement of living standard, people have higher and higher requirements on various articles for daily use, and people pay more attention to details in the aspects of artware or home furnishing and engineering. In the cutting field, in the existing workpiece cutting technology, the problem of dynamic height setting and floating exists when a laser cutting head is used for cutting, so that the cutting plane is not flat, and the laser cutting head can be damaged by collision.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a high accurate increaser detecting system, increaser pass through frequency detection and closed loop servo control, have solved the developments of laser cutting head and have decided high problem of floating, ensure laser cutting planar level and smooth, and the protection cutting head is not hit badly. This multichannel increaser detecting system specifically includes: a workpiece, a sensor, a cutting head, an electrode cable, a preamplifier, a sensor cable, an adjustor, a servo controller, a controller, and a linear drive component.
The bottom end of the cutting head is connected with a sensor, a preamplifier is respectively and electrically connected with the sensor, the cutting head and the height adjuster, the preamplifier is connected with the sensor through an electrode cable, the preamplifier is connected with the output end of the height adjuster through a sensor cable, the input end of the height adjuster is respectively connected with the servo controller and the controller, the servo controller is also connected with a linear driving part, and a workpiece is positioned below the sensor.
The height information of the sensor and the workpiece is converted into capacitance information by the sensor, the preamplifier is used for converting the capacitance information into square wave signals with corresponding frequencies, the height adjuster is used for calculating the height information to be adjusted according to the frequencies of the square wave signals and transmitting the height information to be adjusted to the servo controller, the servo controller is used for controlling the linear driving part to adjust the height of the cutting head according to the height information to be adjusted, and the controller is used for acquiring system information and controlling the system to work.
Further, the preamplifier is internally provided with an RC analog circuit for converting the capacitance information into a square wave signal.
Further, the cutting head is a laser cutting head.
Furthermore, the heightening device adopts an FPGA.
Further, the cutting head is a laser cutting head.
Further, the FPGA is an Artix7 FPGA.
Further, the linear driving part is a driving motor.
The utility model provides a beneficial effect that technical scheme brought is: the problem of developments decide height unsteady is solved for the cutting plane is level and smooth, and has reduced the probability of hitting the laser cutting head, has improved cutting head height detection precision and height adjustment precision.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a block diagram of a high-precision height adjuster detection system according to an embodiment of the present invention.
Fig. 2 is a flowchart of the operation of a high-precision height adjuster detecting system according to an embodiment of the present invention.
The device comprises a workpiece 1, a sensor 2, a cutting head 3, an electrode cable 4, a preamplifier 5, a sensor cable 6, a height adjuster 7, a servo controller 8, a controller 9 and a linear driving part 10.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, the embodiments of the present invention will be described in detail with reference to the accompanying drawings.
An embodiment of the utility model provides a height adjuster detecting system of high accuracy. For use in laser cutting, the sensor 2 and preamplifier 5 convert the height of the cutting head 3 into a frequency signal which is transmitted to the height adjuster 7. The height adjuster 7 accurately detects the input frequency signal, sets the cutting height through the corresponding relation of the calibrated frequency and the height, and dynamically adjusts the cutting head 3 to the set height to form fixed height floating so as to perform stable cutting. The cutting head 3 is a laser cutting head.
As shown in fig. 1, a high-precision detection system for a height adjuster includes: the cutting machine comprises a workpiece 1, a sensor 2, a cutting head 3, an electrode cable 4, a preamplifier 5, a sensor cable 6, a height adjuster 7, a servo controller 8, a controller 9 and a linear driving part 10, wherein the linear driving part 10 is a driving motor in the embodiment.
The bottom end of the cutting head 3 is connected with the sensor 2, the preamplifier 5 is respectively and electrically connected with the sensor 2, the cutting head 3 and the height adjuster 7, the preamplifier 5 is connected with the sensor 2 through the electrode cable 4, the preamplifier 5 is connected with the output end of the height adjuster 7 through the sensor cable 6, the input end of the height adjuster 7 is respectively connected with the servo controller 8 and the controller 9, the servo controller 8 is further connected with the linear driving component 10, and the workpiece 1 is positioned below the sensor 2.
The sensor 2 has a capacitance property, and a capacitance value of the sensor 2 is related to the height Zn of the workpiece 1, that is, the capacitance value corresponds to the height Zn one to one, for example, when the height Zn is a, the capacitance value corresponding to the sensor 2 is B.
The sensor 2 is used for converting height information of the sensor 2 and a workpiece 1 into capacitance information, the preamplifier 5 is used for converting the capacitance information into square wave signals with corresponding frequencies, height information to be adjusted is calculated in the height adjuster 7 according to the frequency of the square wave signals, the height information to be adjusted is output to the servo controller 8, the servo controller 8 controls the driving motor to adjust the height of the cutting head 3 according to the height information to be adjusted, the controller 9 is used for acquiring system information and controlling the system to work, and the driving motor is used for adjusting the height of the cutting head 3.
The method for performing specific detection by using the high-precision detection system of the height adjuster is shown in fig. 2, and comprises the following specific steps:
s1: obtaining an initial height of the cutting head 3 according to the distance between the sensor 2 and the workpiece 1, wherein the initial height is equal to the distance, and the sensor 2 converts the initial height into corresponding capacitance information;
s2: the capacitance information is converted into a square wave signal by using a preamplifier 5, and the square wave signal is output to a heightening device 7;
s3: the input square wave signal is sampled by using the height adjuster 7, so as to obtain the frequency of the measured signal, the current set height of the cutting head 3 is calculated and obtained according to the calibrated corresponding relation between the frequency of the measured signal and the height of the cutting head, and the servo controller 8 controls the linear driving part 10 to adjust the actual height of the cutting head 3 to the set height.
In step S1-2, since the initial height of the cutting head is equal to the distance Zn between the sensor 2 and the workpiece 1, the initial height Zn of the cutting head 3 can be obtained according to the distance Zn between the sensor 2 and the workpiece 1, the sensor 2 converts the initial height Zn into capacitance information through an RC analog circuit, the capacitance information is converted into a square wave signal with a frequency of 1.8 to 3.2MHz by using the preamplifier 2, the voltage of the square wave signal is ± 3V or 0 to 5V, and the square wave signal is output to the height adjuster 7.
In step S3, the height adjuster 7 samples the input square wave signal with the high frequency signal f to obtain the frequency of the signal to be measured, and the height of the cutting head is calibrated by the frequency of the signal to be measured. The type of the booster 7 is Artix7 FPGA, the phase-locked loop PLL multiplies frequency to f =400MHz, that is, the input frequency is multiplied to 400MHz for output, and the level of the input signal is acquired. The FPGA of 3 grades can reach Fmax _ bufg =628MHz, the Fmax _ bufg is a clock parameter of the FPGA, the FPGA of the UltraScale + series can reach 891MHz, and the sampling signal with higher frequency can realize higher detection precision.
During sampling, N measured square wave signals are 1 measured period, and 1 measured period corresponds to N sampling pulses, in this embodiment, N =256 measured square wave signals are 1 measured period. Counting time T = N (1/F) = N/F, calculating measured signal period T = T/N = N/(F × N), and obtaining measured signal frequency F =1/T = N × F/N according to the number of sampling pulses and sampling signals and high-frequency signal F used in sampling. By the mode, the measurement of more than 1MHz can be realized within 0.25ms, and the detection requirement of 1.8-3 MHz and the adjustment interval of 0.25ms of the design requirement are met.
According to the principle of the sensor and the amplifier, the frequency of the measured signal corresponds to the height of the cutting head one by one, namely one frequency of the measured signal corresponds to the height of the cutting head. After signal frequency is calculated in parallel through the FPGA, the height of the cutting head 3 can be correspondingly calibrated, the motor of the driving motor adjusts the cutting head 3 to a fixed height, and then the problem of dynamic fixed height floating is solved, so that the cutting plane is smooth, and the probability of damaging the laser cutting head by collision is reduced.
To test the effectiveness and accuracy of the above method, the test requires that the frequency signal F = 1.6-3 MHz, the sampling frequency F =400MHz (1 ± 30 ppm), 1 set of measurement data has N =256 square wave signals to be measured, the frequency F = N F/N to be measured, and the number of sampling pulses N = F256/F ± 1.
Systematic errors are introduced by two factors: the number of sampling pulses n plus or minus 1 and the frequency of a clock crystal oscillator plus or minus 30ppm.
When F =3MH, n =256 × 400m/3m, F = n × F/(n ± 1) =256 × 400m/(256 × 400m/3M ± 1). The maximum counting error Δ Fc ≈ 88Hz, the maximum crystal oscillator error Δ Fo =3mhz × 30ppm ≈ 90Hz, and the maximum cumulative error rate = (Δ Fc + Δ Fo)/F ≈ 0.0006%. The error analysis for different frequencies is as follows:
the maximum frequency detection error of 178Hz can realize the height detection and adjustment of the cutting head Z axis floating with high precision of far plus or minus 0.1mm and low time delay of 0.25 ms. Therefore, analysis shows that even if the maximum error is reached, the detection system and the detection method of the multi-channel height adjuster can improve the height detection precision and the height adjustment precision of the cutting head, and if the error is smaller, the detection precision and the height adjustment precision are higher.
The utility model has the advantages that: the problem of developments decide the height unsteady is solved for the cutting plane is level and smooth, and has reduced the probability of hitting the broken laser cutting head, has improved cutting head height detection precision and height adjustment precision.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (6)
1. A high-accuracy height adjuster detection system is characterized in that: the method comprises the following steps: the device comprises a workpiece (1), a sensor (2), a cutting head (3), an electrode cable (4), a preamplifier (5), a sensor cable (6), a height adjuster (7), a servo controller (8), a controller (9) and a linear driving component (10);
the bottom end of the cutting head (3) is connected with a sensor (2), a preamplifier (5) is respectively and electrically connected with the sensor (2), the cutting head (3) and a height adjuster (7), the preamplifier (5) is connected with the sensor (2) through an electrode cable (4), the preamplifier (5) is connected with the output end of the height adjuster (7) through a sensor cable (6), the input end of the height adjuster (7) is respectively connected with a servo controller (8) and a controller (9), the servo controller (8) is further connected with a linear driving component (10), and a workpiece (1) is positioned below the sensor (2);
the height adjusting device comprises a sensor (2), a preamplifier (5), an adjustor (7), a servo controller (8), a linear driving component (10), a controller (9) and a servo control system, wherein the sensor (2) is used for converting height information of the sensor (2) and a workpiece (1) into capacitance information, the preamplifier (5) is used for converting the capacitance information into square wave signals with corresponding frequencies, the adjustor (7) is used for calculating height information to be adjusted according to the frequencies of the square wave signals and transmitting the height information to be adjusted to the servo controller (8), the servo controller (8) is used for controlling the linear driving component (10) to adjust the height of a cutting head (3) according to the height information to be adjusted, and the controller (9) is used for acquiring system information and controlling the system to work.
2. A high accuracy riser detection system as defined in claim 1 wherein: the preamplifier (5) is internally provided with an RC analog circuit for converting the capacitance information into a square wave signal.
3. A high accuracy riser detection system as defined in claim 1 wherein: the cutting head (3) is a laser cutting head.
4. A high accuracy riser detection system as defined in claim 1 wherein: the heightening device (7) adopts an FPGA.
5. A high accuracy riser detection system as defined in claim 4 wherein: the FPGA is an Artix7 FPGA.
6. A high accuracy riser detection system as defined in claim 1 wherein: the linear driving component (10) is a driving motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122505516.XU CN217571378U (en) | 2021-10-18 | 2021-10-18 | High-precision height adjuster detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122505516.XU CN217571378U (en) | 2021-10-18 | 2021-10-18 | High-precision height adjuster detection system |
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| Publication Number | Publication Date |
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| CN217571378U true CN217571378U (en) | 2022-10-14 |
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| CN202122505516.XU Active CN217571378U (en) | 2021-10-18 | 2021-10-18 | High-precision height adjuster detection system |
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| CN (1) | CN217571378U (en) |
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2021
- 2021-10-18 CN CN202122505516.XU patent/CN217571378U/en active Active
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Effective date of registration: 20231101 Address after: 430000, Room 5, 2nd Floor, Building 3, No. 1550 Jiefang Avenue, Jiang'an District, Wuhan City, Hubei Province Patentee after: Wuhan Huaxin Microcontrol Technology Co.,Ltd. Address before: 430000 No. 009, 4 / F, precision technology building, Fenghuo technology innovation Valley, No. 88, YouKeYuan Road, Hongshan District, Wuhan City, Hubei Province Patentee before: Wuhan Haikun Equipment Technology Co.,Ltd. |