Wig measuring device and testing method

Abstract

The present application relates to the technical field of wig production, and particularly relates to a wig width measuring device and a measuring method. The device comprises a rack, a stretching device, a detection device and a control device, the detection device is arranged on the opposite side of the stretching direction of the stretching device, and the stretching device and the detection device are electrically connected with the control device. The stretching device comprises a power mechanism and a measuring line, the middle part of the measuring line is surrounded by a circle, one end of the measuring line is provided with a moving block, the measuring line is connected with the output end of the power mechanism through the moving block, and the other end of the measuring line is connected with the detection device. The present application realizes the automation of the hair bundle width rate detection, improves the production efficiency, improves the detection accuracy, and reduces the production cost.

Description

Technical Field

[0001] This invention relates to the field of wig manufacturing technology, and in particular to a wig amplitude measuring device and testing method. Background Technology

[0002] Before leaving the factory, wigs, in addition to other quality inspection items, need to undergo a amplitude qualification rate test. This involves straightening the hair and laying it flat, taking two fixed points at the ends of the hair sample, and then measuring the circumference of the hair bundle at these two points. This is then converted into a cross-sectional area. The cross-sectional area of ​​the hair end is divided by the cross-sectional area of ​​the hair tip to obtain the hair bundle amplitude rate. The obtained hair bundle amplitude rate is compared with the amplitude rate standard. If the amplitude rate standard ±0.2 is met, the measured hair bundle amplitude rate falls within the amplitude rate standard ±0.2, indicating that the hair bundle is qualified. Otherwise, it is unqualified, and it needs to be trimmed and measured again until it meets the standard.

[0003] Currently, the amplitude measurement of hair bundles is entirely done manually. This involves manually tightening a rope around the ends of the hair bundle, then removing the rope and measuring the circumference. Since the cross-sectional area of ​​the hair bundle is circular, it can be converted to its cross-sectional area using the formula for the circumference and area of ​​a circle. The cross-sectional area of ​​the hair ends is obtained in the same way. Dividing the cross-sectional area of ​​the hair ends by the cross-sectional area of ​​the hair ends gives the amplitude of the hair bundle. Tightening the hair bundle requires considerable force, and the force applied to the ends of hair bundles with the same number must be consistent to ensure accurate amplitude measurements. However, ensuring consistent force is too demanding for workers, and they often only work continuously for two hours a day. Extended working hours increase the force error, leading to larger measurement errors. This results in products that pass initial inspection being returned due to customer re-inspection failing. Furthermore, customer re-inspection is also done manually, using the same method as the manufacturer. However, different people applying force to the same hair bundle can produce significant differences, leading to situations where the hair bundle is actually qualified but fails customer re-inspection, causing unnecessary trouble and losses for both the factory and the customer. Furthermore, there are currently no other better testing methods or indicators in the industry. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art and to provide a wig amplitude measuring device and testing method, which realizes the automation of hair bundle amplitude rate detection, improves production efficiency, improves detection accuracy, and reduces production costs.

[0005] The present invention provides a wig amplitude measuring device, including a frame, a stretching device, a detection device and a control device arranged on the frame, the detection device being located on the opposite side of the stretching direction of the stretching device, and both the stretching device and the detection device being electrically connected to the control device.

[0006] The tensioning device includes a power mechanism and a measuring line. The measuring line is arranged in a circle in the middle. A moving block is set at one end of the measuring line. The measuring line is connected to the output end of the power mechanism through the moving block. The other end of the measuring line is connected to the detection device.

[0007] The stretching device automatically tightens the hair bundle, while the detection device ensures a constant tension value, preventing variations in tension values ​​that occur with manual tightening. The control device automates the entire system's control and measurement, automating the detection of hair bundle amplitude, thus improving production efficiency and detection accuracy. The automatic tightening of the hair bundle is achieved through a power mechanism and measuring line, enabling continuous operation and further enhancing production efficiency. The inclusion of a moving block ensures the measuring line moves horizontally, preventing vertical fluctuations during the stretching process.

[0008] Guide blocks are installed on the frame corresponding to the measuring line. There are two guide blocks: one guide block is placed on the side of the frame near the moving block, and the other guide block is placed on the side of the frame near the detection device. The guide blocks can prevent the measuring line from being pulled off-center when the hair bundle is tightened.

[0009] The measuring line comprises an iron wire and a polyester fiber thread, with the polyester fiber thread wrapping around the iron wire. The diameter of the polyester fiber thread is 1.5mm, and the iron wire is a soft iron wire. The wrapping of the iron wire with polyester fiber thread ensures both the flexibility and rigidity of the measuring line. The flexibility of the measuring line facilitates stretching, while the rigidity ensures that the measuring line maintains its circular shape when not in use, and also prevents damage to the hair strand.

[0010] The number of measuring lines is two. One end of each measuring line is connected to the detection device, and the other end rotates upward from the middle and passes through the middle of the two measuring lines. The two measuring lines move simultaneously, which can ensure the stability of the measuring line tensioning process.

[0011] A lead screw is installed at the output end of the power mechanism corresponding to the moving block. The lead screw passes through the moving block and is connected to the moving block by a thread. The power mechanism drives the lead screw to rotate, and the rotation of the lead screw causes the moving block to move along the length of the frame, stretching the measuring line to achieve the measurement of the hair bundle circumference.

[0012] A displacement detection device is installed on the moving block. Before detecting the hair bundle, the moving block is in its initial position, and the initial value of the displacement detection device is 0. When detecting the hair bundle, the power mechanism drives the moving block to move. After the moving block stops moving, the displacement detection device can detect the amount of movement of the moving block. By conversion, the cross-sectional area of ​​the hair bundle can be obtained, thus obtaining the amplitude of the hair bundle. This eliminates the need for manual measurement of the initial and final positions of the moving block, resulting in smaller measurement errors and higher accuracy.

[0013] The detection device includes a tension sensor and a converter. The tension sensor is connected to the measuring line, and the pressure sensor is connected to the control device through the converter. When the measuring line is stretched, it generates tension on the tension sensor. When the tension value reaches the set value of the tension sensor, the power mechanism stops running, completing the tightening action of the hair bundle.

[0014] The control device includes a housing, within which a control mechanism is housed. The housing, corresponding to the control mechanism, includes a start button, a stop button, a zero-position button, a force setting window, a hair tip cross-sectional area window, a hair tail cross-sectional area window, an amplitude rate display screen, an amplitude rate standard range setting window, and a data transmission interface. The control mechanism is a PLC controller. The start, stop, and zero-position buttons control the start, stop, and zeroing of the power mechanism, respectively. The force setting window allows setting the tension sensing value of the tension sensor. When the tension sensor reaches the set value, the power mechanism stops operating. Hair bundle measurement requires measuring the circumference of both the hair tip and hair tail, then converting this into the hair tip and hair tail cross-sectional areas. Dividing the hair tail cross-sectional area by the hair tip cross-sectional area yields the amplitude rate, which is displayed on the amplitude rate display screen. The amplitude rate standard range setting window is used to set the amplitude rate value for different hair bundles.

[0015] The housing is also equipped with a traffic light alarm and a work log display screen corresponding to the control mechanism. The traffic light alarm is used to indicate whether the hair bundle is qualified, and the work log display screen can display the test data corresponding to different numbered hair bundles to provide data support for unqualified products.

[0016] This invention provides a wig testing method, comprising the following steps:

[0017] S1. Value Setting: Press the zero-position button to return the moving block to the zero position. Set the force value in the force setting window and the amplitude rate standard range value in the amplitude rate standard range setting window. Based on market demand, the hair bundle amplitude rate is 10%–45%, and the amplitude rate standard range setting window can be set to a range of 5%–50%. The circumference of the hair bundle to be tested ranges from 8mm to 160mm, corresponding to a tensile force of 20N–100N. Experiments have determined that a tensile force of 60N–80N is optimal. Therefore, the force setting window can be set to a tensile force of 20N–100N to meet the requirements.

[0018] S2. Hair bundle measurement: Mark the first measurement point on the hair bundle to be measured, put the hair bundle to be tested into the coil formed by the measuring line, and then press the start button to measure the cross-sectional area of ​​the hair bundle at the first measurement point.

[0019] The first point to be measured is the hair end. After pressing the start button, the power mechanism starts and drives the measuring line to tighten the hair bundle. The tension sensing device is subjected to tension. When the force is equal to the set value, the control mechanism receives the signal and controls the power mechanism to stop working. The displacement detection device records the displacement of the measuring line at this time and converts it into the cross-sectional area of ​​the hair bundle using a formula.

[0020] S3. Measure the cross-sectional area of ​​the second hair strand to be measured at the second measurement point according to steps S1 and S2; the second measurement point is the hair end.

[0021] S4. Hair Bundle Qualification Judgment: After the cross-sectional area of ​​the hair bundle at the first and second measurement points is calculated, the control mechanism will calculate the hair bundle amplitude rate according to the set formula. If the detected amplitude rate is within the set amplitude rate standard range, the green light will illuminate to indicate qualification, and the detected hair bundle will be placed in the qualified area. If the detected amplitude rate is outside the set amplitude rate standard range, the red light will illuminate and an alarm will sound, indicating that the amplitude rate is too high or too low. Unqualified hair bundles can be identified from the work log display screen according to their numbers to prepare for the next step of hair bundle repair.

[0022] S5. After trimming, measure the hair strands again according to steps S1 to S4 until the hair strand amplitude meets the requirements.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. This invention achieves automatic tensioning of the hair bundle by incorporating a tensioning device. The detection device ensures a constant tension value, preventing variations in tension values ​​that occur with manual tensioning. The control device automates the control and measurement of the entire system, automating the detection of hair bundle amplitude, thus improving production efficiency and detection accuracy. The automatic tensioning of the hair bundle is achieved through a power mechanism and measuring line, enabling continuous operation and further enhancing production efficiency. The inclusion of a moving block ensures the measuring line moves horizontally, preventing vertical fluctuations during the tensioning process.

[0025] 2. The measuring line consists of iron wire and polyester fiber thread, with the polyester fiber thread wrapping around the iron wire. The diameter of the polyester fiber thread is 1.5mm, and the iron wire is soft iron wire. The polyester fiber thread wrapping around the iron wire ensures both the flexibility and rigidity of the measuring line. The flexibility of the measuring line facilitates stretching, while the rigidity of the measuring line maintains its circular shape when not in use, and also prevents damage to the hair strand.

[0026] 3. The control device includes a housing, within which a control mechanism is installed. The housing, corresponding to the control mechanism, includes a start button, a stop button, a zero-position button, a force setting window, a hair tip cross-sectional area window, a hair tail cross-sectional area window, an amplitude rate display screen, an amplitude rate standard range setting window, and a data transmission interface. The control mechanism is a PLC controller. The start, stop, and zero-position buttons control the start, stop, and zeroing of the power mechanism, respectively. The force setting window allows setting the tension sensing value of the tension sensor. When the tension sensor reaches the set value, the power mechanism stops operating. Hair bundle measurement requires measuring the circumference of both the hair tip and hair tail, converting it into a cross-sectional area, and then dividing the hair tail cross-sectional area by the hair tip cross-sectional area to obtain the amplitude rate, which is displayed on the amplitude rate display screen. The amplitude rate standard range setting window is used to set the amplitude rate value for different hair bundles. Attached Figure Description

[0027] Figure 1 This is a first-view three-dimensional structural diagram of Embodiment 1 of the present invention;

[0028] Figure 2 This is a second-view three-dimensional structural diagram of Embodiment 1 of the present invention;

[0029] Figure 3 This is a schematic diagram of the main structure of Embodiment 1 of the present invention;

[0030] Figure 4 This is a top view of the structure of Embodiment 1 of the present invention.

[0031] In the diagram: 1. Detection device; 11. Tension sensing device; 12. Converter; 2. Frame; 3. Tensioning device; 31. Power mechanism; 32. Moving block; 33. Lead screw; 34. Measuring line; 35. Guide block. Detailed Implementation

[0032] The present invention will be further described below with reference to embodiments:

[0033] Example 1

[0034] like Figures 1-4 As shown, the wig amplitude measuring device of the present invention includes a frame 2, on which a stretching device 3, a detection device 1 and a control device are arranged. The detection device 1 is located on the opposite side of the stretching direction of the stretching device 3. Both the stretching device 3 and the detection device 1 are electrically connected to the control device.

[0035] The tensioning device 3 includes a power mechanism 31 and a measuring line 34. The power mechanism 31 is a servo motor. The measuring line 34 is circular in the middle. A moving block 32 is provided at one end of the measuring line 34. The measuring line 34 is connected to the output end of the power mechanism 31 through the moving block 32. The other end of the measuring line 34 is connected to the detection device 1.

[0036] Guide blocks 35 are provided on the frame 2 corresponding to the measuring line 34. There are two guide blocks 35. One guide block 35 is placed on the side of the frame 2 near the moving block 32, and the other guide block 35 is placed on the side of the frame 2 near the detection device 1. The guide blocks 35 can prevent the measuring line 34 from being pulled taut when the hair bundle is tightened.

[0037] The measuring line 34 comprises an iron wire and a polyester fiber thread, with the polyester fiber thread wrapping around the iron wire. The diameter of the polyester fiber thread is 1.5mm, and the iron wire is a soft iron wire. The wrapping of the iron wire with polyester fiber thread ensures both the flexibility and rigidity of the measuring line 34. The flexibility of the measuring line 34 facilitates stretching, while the rigidity of the measuring line 34 maintains its circular shape when not in use, preventing damage to the hair strand.

[0038] There are two measuring lines 34. One end of each measuring line 34 is connected to the detection device 1, and the other end rotates upward from the middle and passes through the middle of the two measuring lines 34. The two measuring lines 34 move simultaneously, which can ensure the stability of the measuring lines 34 during the tightening process.

[0039] A lead screw 33 is installed at the output end of the power mechanism 31 corresponding to the moving block 32. The lead screw 33 passes through the moving block 32 and is connected to the moving block 32 by a thread. The power mechanism 31 drives the lead screw 33 to rotate, and the rotation of the lead screw 33 drives the moving block 32 to move along the length direction of the frame 2, stretching the measuring line 34 to realize the measurement of the hair bundle circumference.

[0040] A displacement detection device 1, which is a displacement sensor, is installed on the moving block 32. Before detecting the hair bundle, the moving block 32 is in its initial position, and the initial value of the displacement detection device 1 is 0. When detecting the hair bundle, the power mechanism 31 drives the moving block 32 to move. After the moving block 32 stops moving, the displacement detection device 1 can detect the amount of movement of the moving block 32. The amount of movement of the moving block 32 is the perimeter of the point where the hair bundle is measured. The cross-sectional area of ​​the hair bundle is circular, so the cross-sectional area of ​​the hair bundle at this point can be obtained according to the formula for the circumference and area of ​​a circle. The amplitude of the hair bundle can be obtained by dividing the cross-sectional area value of the hair end by the cross-sectional area value of the hair tip.

[0041] The detection device 1 includes a tension sensing device 11 and a converter 12. The converter 12 is a transmitter. The tension sensing device 11 is connected to the measuring line 34, and the pressure sensing device is connected to the control device through the converter 12.

[0042] The control device includes a housing, within which a control mechanism is housed. The housing is equipped with a start button, a stop button, a zero-position button, a force setting window, a hair end cross-sectional area window, a hair end cross-sectional area window, an amplitude rate display screen, an amplitude rate standard range setting window, and a data transmission interface, corresponding to the control mechanism. The control mechanism is a PLC controller. The start, stop, and zero-position buttons control the start, stop, and zeroing of the power mechanism 31, respectively. The force setting window allows setting the tension sensing value of the tension sensing device 11. When the tension value received by the tension sensing device 11 reaches the set value, the power mechanism 31 stops operating. The amplitude rate standard range setting window is used to set the amplitude rate values ​​for different hair bundles.

[0043] The housing is also equipped with a traffic light alarm and a work log display screen corresponding to the control mechanism. The traffic light alarm is used to indicate whether the hair bundle is qualified, and the work log display screen can display the test data corresponding to different numbered hair bundles to provide data support for non-qualified products.

[0044] This invention provides a wig testing method, comprising the following steps:

[0045] S1. Value Setting: Press the zero-position button to return the moving block 32 to the zero position. Set the force value in the force setting window and the amplitude rate standard range value in the amplitude rate standard range setting window. According to market demand, the hair bundle amplitude rate is 10% to 45%, and the amplitude rate standard range setting window can be set to an amplitude rate range of 5% to 50%. The circumference of the hair bundle to be tested ranges from 8mm to 160mm, corresponding to a tensile force of 20N to 100N. Experiments have determined that a tensile force of 60N to 80N is optimal. Therefore, the force setting window can be set to a tensile force of 20N to 100N to meet the requirements.

[0046] S2. Hair bundle measurement: Mark the first measurement point on the hair bundle to be measured, put the hair bundle to be tested into the coil formed by the measuring line 34, and then press the start button to measure the cross-sectional area of ​​the hair bundle at the first measurement point.

[0047] The first point to be measured is the hair end. After pressing the start button, the power mechanism 31 starts and drives the measuring line 34 to tighten the hair bundle. The tension sensing device 11 is subjected to tension. When the force is equal to the set value, the control mechanism receives the signal and controls the power mechanism 31 to stop working. The displacement detection device 1 records the displacement of the measuring line 34 at this time and converts it into the cross-sectional area of ​​the hair bundle using a formula.

[0048] S3. Measure the cross-sectional area of ​​the second hair strand to be measured at the second measurement point according to steps S1 and S2; the second measurement point is the hair end.

[0049] S4. Hair Bundle Qualification Judgment: After the cross-sectional area of ​​the hair bundle at the first and second measurement points is calculated, the control mechanism will calculate the hair bundle amplitude rate according to the set formula. If the detected amplitude rate is within the set amplitude rate standard range, the green light will illuminate to indicate qualification, and the detected hair bundle will be placed in the qualified area. If the detected amplitude rate is outside the set amplitude rate standard range, the red light will illuminate and an alarm will sound, indicating that the amplitude rate is too high or too low. Unqualified hair bundles can be identified from the work log display screen according to their numbers to prepare for the next step of hair bundle repair.

[0050] S5. After trimming, measure the hair strands again according to steps S1 to S4 until the hair strand amplitude meets the requirements.

[0051] Test data table

[0052] 1 Set force value 50N 60N 70N 80N 2 Amplitude Standard 40％ 30％ 25％ 15％ 3 hairline area 12.566 26.527 127.316 848.780 4 hair strand and hair end area 5.093 7.958 31.831 127.324 5 Amplitude 40.53％ 30％ 25％ 15％ 6 The results show Unqualified qualified qualified qualified 7 Manual detection amplitude 41.12％ 30％ 25％ 14.86％ 8 Equipment reproducibility 100％ 100％ 100％ 100％ 9 Artificial reproducibility 80％ 80％ 100％ 80％

[0053] Equipment reproducibility: The probability that the amplitude obtained from multiple measurements of the same hair strand using the same equipment is the same as the amplitude obtained from the first measurement.

[0054] Artificial reproducibility rate: The probability that the amplitude rate obtained from multiple manual measurements of the same hair strand is the same as the amplitude rate obtained from the first measurement.

[0055] The descriptions of the orientation and relative positional relationships of the structures in this invention, such as front, back, left, right, up, and down, do not constitute a limitation of this invention, but are merely for the convenience of description.

Claims

1. A wig amplitude measuring device, characterized in that, Includes a frame (2), on which a tensioning device (3), a detection device (1) and a control device are installed. The detection device (1) is located on the opposite side of the tensioning direction of the tensioning device (3). Both the tensioning device (3) and the detection device (1) are electrically connected to the control device. The tensioning device (3) includes a power mechanism (31) and a measuring line (34). The measuring line (34) is arranged in a circle in the middle. A moving block (32) is set at one end of the measuring line (34). The measuring line (34) is connected to the output end of the power mechanism (31) through the moving block (32). The other end of the measuring line (34) is connected to the detection device (1).

2. The wig amplitude measuring device according to claim 1, characterized in that, Guide blocks (35) are set on the frame (2) corresponding to the measurement line (34).

3. The wig amplitude measuring device according to claim 2, characterized in that, The measuring line (34) consists of an iron wire and a polyester fiber line, with the polyester fiber line wrapping around the iron wire.

4. The wig amplitude measuring device according to claim 3, characterized in that, The number of measuring lines (34) is two.

5. The wig amplitude measuring device according to claim 4, characterized in that, The output end of the power mechanism (31) is provided with a lead screw (33) corresponding to the moving block (32). The lead screw (33) passes through the moving block (32) and is connected to the moving block (32) by a thread.

6. The wig amplitude measuring device according to claim 5, characterized in that, The movable block (32) is equipped with a displacement detection device.

7. The wig amplitude measuring device according to any one of claims 1-6, characterized in that, The detection device (1) includes a tension sensing device (11) and a converter (12). The tension sensing device (11) is connected to the measuring line (34), and the pressure sensing device is connected to the control device through the converter (12).

8. The wig amplitude measuring device according to claim 7, characterized in that, The control device includes a housing, inside which a control mechanism is installed. The housing is equipped with a start button, a stop button, a zero position button, a force setting window, a head cross-sectional area window, a tail cross-sectional area window, an amplitude display screen, an amplitude standard range setting window, and a data transmission interface, corresponding to the control mechanism.

9. The wig amplitude measuring device according to claim 8, characterized in that, The housing is also equipped with a traffic light alarm and a work log display screen corresponding to the control mechanism.

10. A wig testing method, characterized in that, The wig amplitude measuring device according to claim 9 includes the following steps: S1, Value setting: Press the zero button to return the moving block (32) to the zero position, set the force value in the force value setting window, and set the amplitude rate standard range value in the amplitude rate standard range setting window; S2, hair bundle measurement: Mark the first measurement point on the hair bundle to be measured, put the hair bundle to be tested into the coil formed by the measuring line (34), and then press the start button to measure the cross-sectional area of ​​the hair bundle at the first measurement point; S3. Measure the cross-sectional area of ​​the second hair bundle to be measured at the hair bundle according to steps S1 and S2; S4. Hair Bundle Qualification Judgment: After the cross-sectional area of ​​the hair bundle at the first and second measurement points is calculated, the control mechanism will calculate the hair bundle amplitude rate according to the set formula. If the detected amplitude rate is within the set amplitude rate standard range, the green light will illuminate to indicate qualification, and the detected hair bundle will be placed in the qualified area. If the detected amplitude rate is outside the set amplitude rate standard range, the red light will illuminate and an alarm will sound, indicating that the amplitude rate is too high or too low. Unqualified hair bundles can be identified from the work log display screen according to their numbers to prepare for the next step of hair bundle repair. S5. After trimming, measure the hair strands again according to steps S1 to S4 until the hair strand amplitude meets the requirements.

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