CN114354413A - Lead wire life tester, lead wire life testing system and lead wire life testing method - Google Patents
Lead wire life tester, lead wire life testing system and lead wire life testing method Download PDFInfo
- Publication number
- CN114354413A CN114354413A CN202111545275.XA CN202111545275A CN114354413A CN 114354413 A CN114354413 A CN 114354413A CN 202111545275 A CN202111545275 A CN 202111545275A CN 114354413 A CN114354413 A CN 114354413A
- Authority
- CN
- China
- Prior art keywords
- test
- lead wire
- tester
- silk thread
- magnet
- 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.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 143
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000003825 pressing Methods 0.000 claims description 34
- 239000004677 Nylon Substances 0.000 claims description 15
- 229920001778 nylon Polymers 0.000 claims description 15
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000010998 test method Methods 0.000 claims description 6
- 230000003044 adaptive effect Effects 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 2
- 230000005236 sound signal Effects 0.000 description 8
- 230000008859 change Effects 0.000 description 5
- 230000001351 cycling effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229920006052 Chinlon® Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005288 electromagnetic effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a lead wire life tester, a lead wire life testing system and a lead wire life testing method. The service life tester for the silk yarn can effectively avoid the clamping damage of the silk yarn, can ensure that the swinging height of the silk yarn is in accordance with the swinging height of an actual use scene, can generate ampere force under the action of a magnetic field when the silk yarn is electrified so as to swing, can test the service life of the silk yarn, and can adjust the magnetic field strength according to the requirement so as to adjust the stress of the silk yarn. The service life testing system for the silk thread can realize service life measurement of the silk thread with the swinging speed, the rotating speed, the radian, the angle, the load current and the like in accordance with the actual use scene, can realize alternate cycle testing of more than two testing conditions, and improves the service life testing precision of the silk thread. According to the method for testing the service life of the silk thread, the silk thread service life testing system is used for testing, the traditional motor mechanical driving swing is abandoned, and the high-precision test that the silk thread highly accords with the use scene can be realized.
Description
Technical Field
The invention relates to the technical field of lead wire detection, in particular to a lead wire service life tester, a lead wire service life testing system and a lead wire service life testing method.
Background
The lead wire arranged in the loudspeaker is a lead wire for connecting the voice coil and the terminal, so that current can be led into the voice coil. Because the lead wire one end of loudspeaker is fixed on the fixed loudspeaker terminal, and one end is fixed on the loudspeaker ring along with the high-speed motion of input signal, at loudspeaker working process, lead wire can follow loudspeaker software high-speed swing, so its life-span of swaying is concerned with loudspeaker life-span and reliability. Therefore, the horn manufacturer usually needs to use tests to evaluate the swinging life of the silk thread during production, so as to ensure the quality of the horn.
At present, the lead wire swing test is generally carried out by using a wire swing tester, the swing of the lead wire swing tester is mechanically driven by a motor as a power source, but the motor mechanical driving test mode has a plurality of defects, such as: (1) the swinging speed is generally only 5-60 r/min (i.e. the frequency is 0.08HZ-1HZ), while the swinging frequency of the lead wire working along with the horn is generally 20HZ-20000HZ), and the difference is extremely large. (2) The swinging test can be carried out only at a fixed rotating speed (frequency), and the swinging speed and amplitude of the silk yarns can change along with the working frequency of the loudspeaker. (3) The swinging test can be carried out only by using a fixed radian (R20) and an angle (such as 90 degrees), and the swinging radian and the angle of the lead wire can be changed along with the working frequency and the power of the horn when the lead wire works. (4) The swinging test can be carried out only by using a fixed load (such as 1KG), and the load can change along with the working frequency and power of the loudspeaker when the silk thread works. (5) The tested load current is only used for checking on and off, the current is only in a fixed milliampere level, and the current is large when the lead wire works (for example, 100W, the rated working current of a horn with 4 ohms is 5A), and the current can change along with the working frequency and power of the horn. (6) It can only be tested by continuous swing test under single fixed speed/angle/load test condition, and can not be tested by two test conditions. (7) The metal clamp for clamping the lead wire for the test is easy to clamp the lead wire at a clamping point, so that the test result is misjudged.
Disclosure of Invention
The invention provides a lead wire service life tester, aiming at solving the problems that the existing motor mechanical drive swing service life test mode has low swing speed, single swing radian, fixed swing load, fixed test load current, easy damage to lead wires and the like, and does not accord with the actual use scene of the lead wires swinging along with the high speed of a loudspeaker voice coil and the real-time change of radian and load.
The invention also aims to provide a service life test system for the lead wire, which comprises the lead wire service life tester.
The invention also aims to provide a lead wire life testing method which is realized based on the lead wire life testing system.
The purpose of the invention is realized by the following technical scheme.
The lead wire life tester comprises an upper magnet bracket and a lower magnet bracket, wherein the upper magnet bracket and the lower magnet bracket are arranged oppositely; the upper magnet support and the lower magnet support can move up and down relatively;
the upper magnet support is provided with a first magnet, the lower magnet support is provided with a second magnet, and the first magnet and the second magnet are arranged oppositely; the two ends of the upper magnet support are provided with first pressing blocks, the two ends of the lower magnet support are provided with second pressing blocks, and the first pressing blocks correspond to the second pressing blocks.
In a preferred embodiment, the first magnet is disposed on a lower surface of the upper magnet holder, the second magnet is disposed on an upper surface of the lower magnet holder, and the first magnet corresponds to the second magnet.
In a preferred embodiment, the first magnet and the second magnet are both neodymium iron boron magnets.
In a preferred embodiment, the first compression block and the second compression block are both soft rubber compression blocks.
In a preferred embodiment, the upper magnet bracket is arranged on the guide post in a vertically sliding manner.
In a more preferred embodiment, the guide post is disposed on an upper fixing plate, a screw rod is disposed on the upper fixing plate, the screw rod can rotate on the upper fixing plate to move up and down, a knob is disposed at the top end of the screw rod, and the bottom end of the screw rod is connected with the upper magnet support through a bearing and a bearing seat.
In a preferred embodiment, the silk thread life tester is provided with a transparent outer cover.
A service life test system for a lead wire comprises a sweep generator, a power amplifier, a tester, a relay, a timing counter and an ammeter;
the sweep frequency instrument is connected with the power amplifier and can output signals to the power amplifier, the power amplifier can be connected with the relay through a lead wire and can output signals to the relay, the timing counter is connected with the relay and can output signals to the relay, and the relay is connected with the ammeter; the tester is the lead wire life tester of any one of the above.
In a preferred embodiment, the power amplifier has one or more power amplifiers for independently adjusting the output size.
In a more preferred embodiment, the power amplifier has two power amplifiers for independently adjusting the output magnitude, and the two power amplifiers can independently control and amplify different audio signals provided by the two frequency scanners, so that two currents with different frequencies and magnitudes for realizing a cycle life test are provided by the same power amplifier.
In a preferred embodiment, the timing counter is a dual-function timing counter, and can control the start, the termination and the end of the test, and the control mode can be set to include: duration of testing, and/or number of cycling tests.
In a preferred embodiment, the lead wire is connected to the power amplifier and the relay through a terminal board.
A lead wire life test method adopts any one of the lead wire life test systems to carry out testing, and comprises the following steps:
s1, placing the silk thread to be tested in an adjusting block, placing the adjusting block in the tester, mutually pressing the adjusting block by an upper magnet support and a lower magnet support of the tester, and adjusting the silk thread placed in the adjusting block to form the silk thread to be tested with radian;
s2, cutting the to-be-detected silk thread with the radian to obtain the to-be-detected silk thread with fixed length and radian;
s3, readjusting the distance between the upper magnet support and the lower magnet support, and enabling the two ends of the nylon wire to be pressed by the first pressing block and the second pressing block in a matched mode; taking out the adjusting block, and placing the lead wire to be tested with fixed length and radian between an upper magnet bracket and a lower magnet bracket of the tester;
s4, connecting two ends of the lead wire with the power amplifier and the relay respectively; the lead wire life testing system is connected with a power supply, and the frequency scanner, the power amplifier, the relay and the timing counter are adjusted to set parameters;
s5, starting a test; observing the swinging state of the silk thread in the tester when the test is started and after the test is performed at a fixed interval; if abnormal, go to S6; if no abnormal situation exists, the step enters S7;
s6, turning off the power supply, searching the reason, entering S4 after correction, and retesting;
s7, observing the time and/or times of the timing counter at regular time, and observing and recording the numerical value displayed by the ammeter;
s8, if the ammeter shows that the current value is less than 0.01A, or the count value of the continuous test of the timing counter stops increasing, the nylon wire is opened, and the test fails; recording the time and/or times when the test fails, finishing the test, and failing to test the service life of the lead wire;
if the ammeter shows that the current value is not less than 0.01A and the count value of the continuous test of the timing counter reaches the set value, continuing to enter S9;
s9, after the test is automatically stopped, turning off the power supply, and taking out the silk thread;
s10, testing the direct current resistance of the nylon wire; if the direct current resistance of the silk thread line meets the specification and the appearance of the silk thread line is not damaged, the service life test is qualified; if not, the service life test is unqualified.
In a preferred embodiment, the adjusting block comprises an upper adjusting block and a lower adjusting block which are matched with each other, and an adaptive cambered surface is arranged between the upper adjusting block and the lower adjusting block.
In a more preferred embodiment, the length of the arc surface between the upper adjusting block and the lower adjusting block is less than or equal to the length of the first magnet and the second magnet.
In a preferred embodiment, an adjustable resistor is connected between the power amplifier and the relay.
In a preferred embodiment, the oscillation of the silk thread line in the tester is based on: and F is ILBsin alpha, wherein F is ampere force, I is current, L is the length of the nylon wire, and alpha is an included angle (I, B) between the current direction and the magnetic field direction. And the strength of the force borne by the lead wire in the service life test can be adjusted and controlled according to the requirement by changing the magnetic field strength B and/or adjusting the output power of the power amplifier or the load resistance of the adjustable resistor to adjust the current I.
In a preferred embodiment, a plurality of silk threads are tested simultaneously, and the test data including current and time and/or times of each tested silk thread is independently monitored and controlled; and in the multiple brocade wires tested at the same time, the brocade wires failed in the test are stored for the time and/or times when the brocade wires fail, and the brocade wires which do not fail in the test can be continuously tested.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the service life tester for the silk yarn is provided with the upper magnet support and the lower magnet support, when the service life of the silk yarn is tested, two ends of the silk yarn can be pressed and fixed by the two corresponding soft rubber pressing blocks arranged on the upper magnet support and the lower magnet support, the pressing height of the silk yarn is similar to the fixed installation of the silk yarn on a loudspeaker, the clamping damage of the silk yarn can be effectively avoided, the swinging height of the silk yarn can be ensured to be consistent with the swinging height in actual use, and the service life test result is more accurate. Meanwhile, magnets are arranged on the upper magnet support and the lower magnet support, and a magnetic field can be generated in an area between the upper magnet support and the lower magnet support, so that the nylon yarn wire arranged in the area between the upper magnet support and the lower magnet support can generate ampere force under the action of the magnetic field when current is introduced, and swing is generated, and the service life of the nylon yarn wire is tested.
And the distance between the upper magnet support and the lower magnet support is adjustable, so that the strength of a magnetic field generated in an area between the upper magnet support and the lower magnet support is adjustable, and the strength of the magnetic field can be adjusted as required to adjust the stress of the nylon wire.
The service life testing system for the silk yarn is provided with a sweep generator, a power amplifier, a tester, a relay, a timing counter and an ammeter, and the adopted tester is the service life tester for the silk yarn. During testing, the lead wire is clamped in the tester, an audio signal sent by the sweep generator is amplified by the power amplifier to reach the current required for driving the lead wire to move in a magnetic field and pass through the lead wire, then timing and/or counting are carried out by the timing counter, the ammeter monitors the test current in real time, and the relay controls the on-off and conversion of the current, so that the life test of the lead wire is carried out, the life measurement of the lead wire with the swinging speed, the rotating speed, the radian, the angle, the load current and the like in accordance with the actual use scene height can be realized, the alternate cycle test of more than two test conditions can be realized based on the independent multi-path power amplifier of the power amplifier, the life test precision of the lead wire is improved, and the quality of the produced loudspeaker is ensured.
According to the method for testing the service life of the silk thread, disclosed by the invention, the traditional motor mechanical driving swing is abandoned, the ampere force driving swing is realized by the electromagnetic effect, and the high-precision test that the silk thread highly accords with the use scene can be realized.
Drawings
FIG. 1 is a schematic sectional view of a life tester for silk thread lines according to the present invention in a specific embodiment;
FIG. 2 is a connection diagram of the life test system for silk thread line of the present invention during testing in an embodiment;
FIG. 3 is a flowchart of a life test method for silk thread lines according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a life test method of a silk thread line according to the present invention in an embodiment;
FIG. 5 is a schematic structural diagram of a tuning block;
the attached drawings are marked as follows: 1-a frequency scanner, 2-a power amplifier, 3-an adjustable resistor, 4-a terminal board, 5-a tester, 51-an upper magnet support, 52-a lower magnet support, 53-a first magnet, 54-a second magnet, 55-a first pressing block, 56-a second pressing block, 57-an upper fixing plate, 58-a guide pillar, 59-a screw rod, 510-a knob, 511-a bearing, 512-a bearing seat, 6-a relay, 7-a timing counter, 8-an ammeter, 9-an adjusting block, 91-an upper adjusting block and 92-a lower adjusting block.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to specific examples and drawings, but the scope and implementation of the present invention are not limited thereto.
In the description of the specific embodiments, it should be noted that the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships where products of the invention are usually placed when the products of the invention are used, and the terms "first", "second", and the like are used for convenience of distinction and are only used for convenience of description and simplification of description, but do not indicate or imply that structures or elements to be referred must have specific orientations, be constructed in specific orientations, and be operated, and therefore, are not to be construed as limiting the invention, and are not to indicate or imply relative importance.
Unless expressly stated or limited otherwise, the terms "mounted," "disposed," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. In addition, as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example one
The lead wire life tester 5 provided by the invention can clamp the lead wire and provide a magnetic field when the lead wire life is tested.
Referring to fig. 1, the silk thread life tester 5 includes an upper magnet support 51 and a lower magnet support 52. The upper magnet holder 51 and the lower magnet holder 52 are disposed opposite to each other, magnets may be disposed on both the upper magnet holder 51 and the lower magnet holder 52, and a magnetic field may be generated in a space region between the upper magnet holder 51 and the lower magnet holder 52 by the magnets disposed on the upper magnet holder 51 and the lower magnet holder 52.
Specifically, the upper magnet holder 51 is provided with a first magnet 53, the lower magnet holder 52 is provided with a second magnet 54, and the first magnet 53 and the second magnet 54 are arranged to face each other. In the illustrated embodiment, the first magnet 53 is disposed on the lower surface of the upper magnet holder 51 and may or may not protrude from the surface, the second magnet 54 is disposed on the upper surface of the lower magnet holder 52 and may or may not protrude from the surface, and the first magnet 53 and the second magnet 54 correspond to each other, so that the sensitivity of the magnetic field generated in the space region between the upper magnet holder 51 and the lower magnet holder 52 by the first magnet 53 and the second magnet 54 is higher. In a preferred embodiment, the first magnet 53 and the second magnet 54 are both ndfeb magnets, which generate a strong magnetic field as permanent magnets.
The upper magnet holder 51 and the lower magnet holder 52 may be moved up and down relative to each other, and when the upper magnet holder 51 and the lower magnet holder 52 are moved relative to each other, the distance between the magnets placed on the upper magnet holder 51 and the lower magnet holder 52 is changed, and the intensity of the magnetic field generated in the region between the upper magnet holder 51 and the lower magnet holder 52 is changed, so that the intensity of the magnetic field may be adjusted by adjusting the distance between the upper magnet holder 51 and the lower magnet holder 52.
In a preferred embodiment, referring to fig. 1 again, the upper magnet support 51 is disposed on the guide posts 58 and can slide up and down along the guide posts 58 under the guidance of the guide posts 58, so as to realize the relative movement between the upper magnet support 51 and the lower magnet support 52.
Wherein, the guide posts 58 are disposed on the upper fixing plate 57, as shown in the specific embodiment shown in fig. 1, four guide posts 58 are connected to four corners disposed on the top of the upper fixing plate 57, and four corners of the upper magnet support 51 are disposed on the four guide posts 58 in a manner of freely sliding up and down. Further, a screw rod 59 is arranged on the upper fixing plate 57, a screw hole which is matched with the screw rod 59 and is used for accommodating the screw rod 59 to penetrate through is formed in the upper fixing plate 57, and the screw rod 59 can rotate on the upper fixing plate 57 to move up and down; in addition, the top end of the screw rod 59 is connected with a knob 510, the screw rod 59 can be synchronously driven to rotate by rotating the knob 510, and the bottom end of the screw rod 59 is connected with the upper magnet support 51 through a bearing 511 and a bearing seat 512. Thus, when the distance between the upper magnet support 51 and the lower magnet support 52 needs to be adjusted, the upper magnet support 51 can be driven to move up and down by rotating the knob 510 through the lead screw 59 and the bearing seat 512, so as to adjust the distance between the upper magnet support 51 and the lower magnet support 52, and further conveniently adjust the distance between the first magnet 53 and the second magnet 54, so as to adjust the magnetic field intensity of the space region between the upper magnet support 51 and the lower magnet support 52.
Referring to fig. 1 again, in the silk thread wire life tester 5, first pressing blocks 55 are disposed at the left and right ends of the upper magnet holder 51, and second pressing blocks 56 are disposed at the left and right ends of the lower magnet holder 52. Specifically, the lower surfaces of the end portions at the left and right ends of the upper magnet support 51 are provided with first pressing blocks 55, the upper surfaces of the end portions at the left and right ends of the lower magnet support 52 are provided with second pressing blocks 56, and the first pressing blocks 55 correspond to the second pressing blocks 56. When the upper magnet holder 51 and the lower magnet holder 52 are close to each other, the first pressing block 55 and the second pressing block 56, which correspond to each other on the left and right, can be pressed against each other, thereby achieving a pressing action.
When the service life of the silk yarn is tested, the silk yarn is placed in a space area between the upper magnet support 51 and the lower magnet support 52, two ends of the silk yarn are clamped by the first pressing block 55 and the second pressing block 56 which correspond to the left side and the right side respectively, and the middle part of the silk yarn can swing freely in the space area between the upper magnet support 51 and the lower magnet support 52.
In a preferred embodiment, the first compact block 55 and the second compact block 56 are both soft rubber compact blocks. Optionally but not limitatively, the first pressing block 55 and the second pressing block 56 are made of soft rubber materials with the same hardness as the soft rubber fixed on the horn by the silk thread, and are mounted by screws, so that the silk thread is protected from abnormal damage caused by stress due to clamping at the pressed fixing point, and misjudgment of the test result is effectively prevented; and the thickness of first compact heap 55 and second compact heap 56 can be adjusted according to reality, if select 10mm thick to can conveniently compress tightly fixed silk thread fast.
In a further preferred embodiment, the periphery of the chinlon wire life tester 5 is provided with a transparent outer cover. Optionally, but not limited to, the transparent cover is made of a transparent glass panel or a mark plate. Therefore, the clamping and swinging conditions of the silk yarn in the silk yarn life tester 5 can be visually observed, so that the test conditions of the silk yarn can be mastered in real time.
Example two
The service life test system for the lead wire line can simulate the service life test of an actual service scene that the lead wire line is assembled in a loudspeaker and swings rapidly at high frequency along with the frequency of an input signal of the loudspeaker, and the pertinence, the accuracy and the effectiveness of the service life test are high.
Referring to fig. 2, the silk thread wire life testing system includes a frequency scanner 1, a power amplifier 2, a tester 5, a relay 6, a timing counter 7 and an ammeter 8.
The frequency scanner 1 is connected with the power amplifier 2 and can output signals to the power amplifier 2, the power amplifier 2 can be connected with a relay 6 through a lead wire and can output signals to the relay 6, the timing counter 7 is connected with the relay 6 and can output signals to the relay 6, and the relay 6 is connected with the ammeter 8; the tester 5 is the silk thread life tester described in the first embodiment. When in test and installation, the lead wire is pressed and clamped in the tester 5, and two ends of the lead wire can be respectively connected with the power amplifier 2 and the relay 6, so that the power amplifier 2 and the relay 6 are electrically connected; and the central portion of the nylon wire is located in a space region between the upper magnet holder 51 and the lower magnet holder 52, which has a magnetic field generated by the first magnet 53 and the second magnet 54.
When testing, the silk thread is adjusted and installed in the tester 5. The timing counter 7 is used for setting a set value for the whole system and monitoring the operation of the whole system, and particularly, test conditions such as the time of continuous test, the test time, the test period, the test times and the like of cyclic test can be set and monitored. The audio signal sent by the sweep generator 1 is amplified by the power amplifier 2 to achieve the alternating current required for driving the silk thread line to move in the magnetic field, when the driving current flows through the silk thread line, the silk thread line is under the action of ampere force in the magnetic field, and the ampere force can drive the silk thread line to swing along with the change of the audio current, so that the swing of the silk thread line is highly in line with the actual use condition of high-frequency rapid swing along with the frequency of a loudspeaker input signal. The relay 6 can control the on-off and conversion of the driving current, and the ammeter 8 can monitor the testing current in real time.
Wherein, the original audio signal emitted by the frequency scanner 1 can comprise 20HZ-20KHZ frequency full audio signal, fixed frequency (such as 100HZ) signal, set frequency band (such as 20HZ-2000HZ) or set scanning period (such as 1S) signal, and the output voltage is adjustable.
And the power amplifier 2 is provided with one or more paths of power amplifiers for independently adjusting the output size. In a preferred embodiment, the power amplifier 2 has two power amplifiers for independently adjusting the output amplitude, and the two power amplifiers can independently control and amplify different audio signals provided by the two frequency scanners 1, so that two currents with different frequencies and different amplitudes for realizing the cycle life test are provided by the same power amplifier 2.
When the power amplifier 2 is used, the left/right channel volume adjustment potentiometer (VR) of the power amplifier 2 is adjusted to be minimum anticlockwise (power output is 0), a power switch is turned on, and the left/right channel volume adjustment potentiometer (corresponding to the on/off state of a relay) is respectively and slowly adjusted clockwise until the ammeter displays a current value to a required test current.
Furthermore, in a preferred embodiment, the timing counter 7 is a dual-function timing counter, and can control the start, the end and the end of the test, and the control mode can be set to include: duration of testing, and/or number of cycling tests. If the single-condition continuous test is carried out, the time setting function of the timer can be adjusted, and the required time, such as 2000 seconds, can be set; such as a dual signal or on/off cycling test, the switch to dual timing can be adjusted to reset the time required to turn off (e.g., 10.00 seconds) and the time required to turn on (e.g., 18.50 seconds). Specifically, referring to fig. 2 again, in the illustrated embodiment, a hall sensor connected to the timing counter 7 is provided, and the hall sensor senses the test current and controls the timing counter 7.
In another preferred embodiment, two ends of the silk thread are connected with the power amplifier 2 and the relay 6 through terminal boards 4, the terminal boards 4 are arranged on the outer sides of the left end and the right end of the tester 5, and the terminal boards 4 are provided with a plurality of access ports, so that a plurality of groups of silk threads can be pressed in independently and reliably at the same time to carry out service life test, and the test efficiency is improved.
EXAMPLE III
The invention discloses a life test method of a lead wire line, which adopts the life test system of the lead wire line of the second embodiment to carry out test, please refer to fig. 3 and 4, and the test method comprises the following steps:
s1, placing the silk thread to be tested in an adjusting block 9, placing the adjusting block 9 in the tester 5, mutually pressing the adjusting block 9 by an upper magnet support 51 and a lower magnet support 52 of the tester 5, wherein an arc surface is arranged in the adjusting block 9, and when the adjusting block 9 is pressed, the silk thread deforms along with the arc surface of the adjusting block 9 to be adjusted to form the silk thread to be tested with radian;
as shown in fig. 5, the adjusting block 9 includes an upper adjusting block 91 and a lower adjusting block 92 that are clamped together, and an adaptive arc surface is formed between the upper adjusting block 91 and the lower adjusting block 92.
When the silk thread line is adjusted, the lower adjusting block 92 is placed in the tester 5, then the silk thread line is placed in, the upper adjusting block 91 is pressed in, the knob 510 is rotated to enable the upper magnet support 51 to pressurize the adjusting block 9, the silk thread line is enabled to have a radian corresponding to the cambered surface between the upper adjusting block 91 and the lower adjusting block 92, and the length of the cambered portion of the silk thread line is determined accordingly. In a preferred embodiment, the length of the arc surface between the upper adjusting block 91 and the lower adjusting block 92 is less than or equal to the length of the first magnet 53 and the second magnet 54, so as to ensure that the adjusted lengths of the arc-shaped portions of the brocade wire can be effectively located in the magnetic field formed by the first magnet 53 and the second magnet 54.
Moreover, optionally, in different adjusting blocks 9, the thickness of the adjusting block 9, the length of the arc surface adapted between the upper adjusting block 91 and the lower adjusting block 92, and the size of the arc surface may be different, for example, the adjusting block with the arc surface R150 and the thickness of 9mm is selected. Therefore, different adjusting blocks 9 can be replaced according to the radian and length requirements of different lead wires in actual test so as to meet different test requirements.
S2, cutting the to-be-detected silk thread with the radian to obtain the to-be-detected silk thread with fixed length and radian;
s3, readjusting the distance between the upper magnet support 51 and the lower magnet support 52, and enabling the two ends of the silk thread to be pressed by the first pressing block 55 and the second pressing block 56 in a matching mode; taking out the adjusting block 9, and placing the to-be-tested lead wire with fixed length and radian between an upper magnet bracket 51 and a lower magnet bracket 52 of the tester 5;
in a specific embodiment, the overall size of the adjusting block 9 is smaller than the size of the gap between the upper magnet support 51 and the lower magnet support 52, so as to facilitate the removal of the adjusting block 9 without causing the silk thread to be displaced or deformed. If the gap size between the upper magnet support 51 and the lower magnet support 52 is set to be 20mm, the integral thickness of the overlapped cotton threads of the adjusting block 9 is 19 mm; when the adjusting block 9 is taken out, the upper adjusting block 91 is taken out, and then the lower adjusting block 92 is pulled out, while the silk thread is still kept still and clamped between the upper magnet support 51 and the lower magnet support 52.
S4, connecting two ends of the lead wire with the power amplifier 2 and the relay 6 respectively; the lead wire life testing system is powered on, and the frequency scanner 1, the power amplifier 2, the relay 6 and the timing counter 7 are adjusted to set parameters;
s5, starting a test; observing the swinging state of the silk thread in the tester 5 when the test is started and at fixed time intervals (such as every 4 hours); if abnormal, go to S6; if no abnormal situation exists, the step enters S7;
wherein, the lead wire line is in the swing basis of tester 5 is: and F is ILBsin alpha, wherein F is ampere force, I is current, L is the length of the nylon wire, and alpha is an included angle (I, B) between the current direction and the magnetic field direction. When the magnetic field B is not changed, the silk thread is introduced into alternating current which is emitted by the sweep generator 1 and amplified by the power amplifier 2, and the silk thread is driven by ampere force to swing along with the current direction and frequency.
S6, turning off the power supply, searching the reason, entering S4 after correction, and retesting;
s7, observing the time and/or times of the timing counter 7 at regular time, and observing and recording the numerical value displayed by the ammeter 8;
s8, if the ammeter 8 shows that the current value is less than 0.01A, or the count value of the continuous test of the timing counter 7 stops increasing, the nylon wire is opened, and the test fails; recording the time and/or times when the test fails, finishing the test, and failing to test the service life of the lead wire;
if the ammeter 8 shows that the current value is not less than 0.01A and the count value of the continuous test of the timing counter 7 reaches the set value, proceeding to S9;
the testing method comprises the following steps that a plurality of lead wire lines are tested simultaneously, and the testing data including current, time and/or times of each tested lead wire line are independently monitored and controlled; and in the multiple brocade wires tested at the same time, the brocade wires failed in the test are stored for the time and/or times when the brocade wires fail, and the brocade wires which do not fail in the test can be continuously tested.
S9, after the test is automatically stopped, turning off the power supply, and taking out the silk thread;
s10, testing the direct current resistance of the nylon wire; if the direct current resistance of the silk thread line meets the specification and the appearance of the silk thread line is not damaged, the service life test is qualified; if not, the service life test is unqualified.
Referring to fig. 2 again, in a preferred embodiment, an adjustable resistor 3 is connected between the power amplifier 2 and the relay 6. By adjusting the load resistance (such as 4 ohms) of the adjustable resistor 3, the horn impedance DCR can be simulated, and the test precision is further improved. In the illustrated embodiment, the power amplifier 2 and the relay 6 are electrically connected by a lead wire, the ammeter 8 is arranged on the connection line of the relay 6 and the lead wire, and the adjustable resistor 3 is arranged on the connection line of the ammeter 8 and the relay 6.
In addition, when different silk threads are tested, the distance between the first magnet 53 and the second magnet 54 can be adjusted by adjusting the upper magnet support 51 and the lower magnet support 52 of the tester 5, so that the magnetic field intensity B is changed, and/or the output power of the power amplifier 2 or the load resistance of the adjustable resistor 3 is adjusted to adjust the current I, and the force borne by the silk threads during service life testing can be adjusted and controlled as required.
In another preferred embodiment, as shown in fig. 4, two frequency signals are used to alternately perform the cycle life test, two frequency scanners 1 of the frequency scanner a and the frequency scanner B respectively output audio signals to the power amplifier 2, and the power amplifier 2 has two power amplifiers for independently adjusting the output size, and can independently control and amplify different audio signals provided by the two frequency scanners 1.
The above embodiments are merely preferred embodiments of the present invention, and the technical solutions of the present invention are described in further detail, but the above descriptions are exemplary, not exhaustive, and are not limited to the disclosed embodiments, the scope and implementation of the present invention are not limited thereto, and any changes, combinations, deletions, substitutions or modifications that do not depart from the spirit and principle of the present invention are included in the scope of the present invention.
Claims (13)
1. The service life tester for the nylon yarn is characterized by comprising an upper magnet bracket and a lower magnet bracket, wherein the upper magnet bracket and the lower magnet bracket are oppositely arranged; the upper magnet support and the lower magnet support can move up and down relatively;
the upper magnet support is provided with a first magnet, the lower magnet support is provided with a second magnet, and the first magnet and the second magnet are arranged oppositely; the two ends of the upper magnet support are provided with first pressing blocks, the two ends of the lower magnet support are provided with second pressing blocks, and the first pressing blocks correspond to the second pressing blocks.
2. The silk yarn life tester of claim 1, wherein the first magnet is disposed on a lower surface of the upper magnet support, the second magnet is disposed on an upper surface of the lower magnet support, and the first magnet corresponds to the second magnet.
3. The lead wire life tester of claim 1, wherein the first compression block and the second compression block are both soft rubber compression blocks.
4. The silk thread line life tester of claim 1, wherein the upper magnet bracket is slidably disposed on the guide post.
5. The silk yarn life tester as claimed in claim 4, wherein the guide post is disposed on an upper fixing plate, a lead screw is disposed on the upper fixing plate, the lead screw can rotate on the upper fixing plate to move up and down, a knob is disposed at the top end of the lead screw, and the bottom end of the lead screw is connected to the upper magnet support through a bearing and a bearing seat.
6. The silk yarn life tester as claimed in any one of claims 1 to 5, wherein the silk yarn life tester is provided with a transparent outer cover.
7. A service life test system for a lead wire is characterized by comprising a sweep generator, a power amplifier, a tester, a relay, a timing counter and an ammeter;
the sweep frequency instrument is connected with the power amplifier and can output signals to the power amplifier, the power amplifier can be connected with the relay through a lead wire and can output signals to the relay, the timing counter is connected with the relay and can output signals to the relay, and the relay is connected with the ammeter; the tester is the lead wire life tester as claimed in any one of claims 1-6.
8. The silk yarn line life testing system of claim 7, wherein the power amplifier has one or more power amplifiers that independently adjust the output size.
9. The silk yarn life testing system of claim 7, wherein the timing counter is configurable to include a duration of the duration test, and/or a number of cycles of the duration test.
10. The silk thread line life test system of claim 7, wherein the silk thread line is connected with the power amplifier and the relay through a terminal board.
11. A lead wire life test method is characterized in that the lead wire life test system of any one of claims 7 to 10 is adopted for testing, and the method comprises the following steps:
s1, placing the silk thread to be tested in an adjusting block, placing the adjusting block in the tester, mutually pressing the adjusting block by an upper magnet support and a lower magnet support of the tester, and adjusting the silk thread placed in the adjusting block to form the silk thread to be tested with radian;
s2, cutting the to-be-detected silk thread with the radian to obtain the to-be-detected silk thread with fixed length and radian;
s3, readjusting the distance between the upper magnet support and the lower magnet support, and enabling the two ends of the nylon wire to be pressed by the first pressing block and the second pressing block in a matched mode; taking out the adjusting block, and placing the lead wire to be tested with fixed length and radian between an upper magnet bracket and a lower magnet bracket of the tester;
s4, connecting two ends of the lead wire with the power amplifier and the relay respectively; the lead wire life testing system is connected with a power supply, and the frequency scanner, the power amplifier, the relay and the timing counter are adjusted to set parameters;
s5, starting a test; observing the swinging state of the silk thread in the tester when the test is started and after the test is performed at a fixed interval; if abnormal, go to S6; if no abnormal situation exists, the step enters S7;
s6, turning off the power supply, searching the reason, entering S4 after correction, and retesting;
s7, observing the time and/or times of the timing counter at regular time, and observing and recording the numerical value displayed by the ammeter;
s8, if the ammeter shows that the current value is less than 0.01A, or the count value of the continuous test of the timing counter stops increasing, the nylon wire is opened, and the test fails; recording the time and/or times when the test fails, finishing the test, and failing to test the service life of the lead wire;
if the ammeter shows that the current value is not less than 0.01A and the count value of the continuous test of the timing counter reaches the set value, continuing to enter S9;
s9, after the test is automatically stopped, turning off the power supply, and taking out the silk thread;
s10, testing the direct current resistance of the nylon wire; if the direct current resistance of the silk thread line meets the specification and the appearance of the silk thread line is not damaged, the service life test is qualified; if not, the service life test is unqualified.
12. The method for testing the service life of the silk yarn line as claimed in claim 11, wherein the adjusting block comprises an upper adjusting block and a lower adjusting block which are matched with each other, and an adaptive cambered surface is arranged between the upper adjusting block and the lower adjusting block.
13. The silk yarn line life testing method of claim 11, wherein an adjustable resistor is connected between the power amplifier and the relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111545275.XA CN114354413A (en) | 2021-12-16 | 2021-12-16 | Lead wire life tester, lead wire life testing system and lead wire life testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111545275.XA CN114354413A (en) | 2021-12-16 | 2021-12-16 | Lead wire life tester, lead wire life testing system and lead wire life testing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114354413A true CN114354413A (en) | 2022-04-15 |
Family
ID=81098429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111545275.XA Pending CN114354413A (en) | 2021-12-16 | 2021-12-16 | Lead wire life tester, lead wire life testing system and lead wire life testing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114354413A (en) |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05142130A (en) * | 1991-11-25 | 1993-06-08 | Honda Motor Co Ltd | Frp member capable of predetecting fatigue failure and its detecting method |
| JPH08219965A (en) * | 1995-02-13 | 1996-08-30 | Hitachi Ltd | Test equipment for electromagnetic force load |
| CN1766596A (en) * | 2005-09-30 | 2006-05-03 | 西安交通大学 | Method for determining metal film/substrate interface fatigue performance by Ampere's force |
| CN1963445A (en) * | 2005-11-09 | 2007-05-16 | 中国科学院金属研究所 | Testing method of endurance performance of tiny sample and implement apparatus |
| CN101446627A (en) * | 2008-12-18 | 2009-06-03 | 中国科学院微电子研究所 | Vertical variable magnetic field device |
| CN105261439A (en) * | 2015-10-30 | 2016-01-20 | 黑龙江大学 | Small-sized adjustable constant magnetic field apparatus |
| CN105891028A (en) * | 2016-06-01 | 2016-08-24 | 上海电缆研究所 | Metal wire vibration fatigue testing machine and metal wire vibration fatigue testing method |
| CN205752938U (en) * | 2016-05-03 | 2016-11-30 | 余爱身 | A kind of wire rod transmits tool |
| CN206607199U (en) * | 2017-04-01 | 2017-11-03 | 中国石油大学(北京) | Device for magnetic treatment for improving waxy crude oil mobility |
| CN107478144A (en) * | 2017-07-27 | 2017-12-15 | 中国科学院高能物理研究所 | A kind of silk thread positioner and method based on quadrupole electromagnet and vibration line technology |
| CN107686989A (en) * | 2017-07-21 | 2018-02-13 | 浙江工业大学 | A kind of electromagnetic field regulation device for laser manufacture |
| CN108051316A (en) * | 2017-12-14 | 2018-05-18 | 辽宁工程技术大学 | Electromagnetic field induces ferrimagnet dynamic bending fatigue test device and method |
| CN108205117A (en) * | 2017-12-20 | 2018-06-26 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of Magnetic susceptibility test device for meeting DO-160G standards |
| US20180192217A1 (en) * | 2017-01-04 | 2018-07-05 | Apple Inc. | Capacitive sensing of a moving-coil structure with an inset plate |
| CN110095334A (en) * | 2019-04-09 | 2019-08-06 | 三峡大学 | A kind of experimental provision and method using Ampere force simulation rock stress condition |
| CN110161081A (en) * | 2019-04-11 | 2019-08-23 | 浙江清华柔性电子技术研究院 | Conductive film bend resistance performance measurement method and measuring device |
| CN111610093A (en) * | 2020-05-27 | 2020-09-01 | 梅州市量能新能源科技有限公司 | Method for detecting tightness of lithium ion battery roll core |
| CN211478378U (en) * | 2019-09-25 | 2020-09-11 | 深圳市晶丰弘实业有限公司 | Electronic component test fixture |
-
2021
- 2021-12-16 CN CN202111545275.XA patent/CN114354413A/en active Pending
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05142130A (en) * | 1991-11-25 | 1993-06-08 | Honda Motor Co Ltd | Frp member capable of predetecting fatigue failure and its detecting method |
| JPH08219965A (en) * | 1995-02-13 | 1996-08-30 | Hitachi Ltd | Test equipment for electromagnetic force load |
| CN1766596A (en) * | 2005-09-30 | 2006-05-03 | 西安交通大学 | Method for determining metal film/substrate interface fatigue performance by Ampere's force |
| CN1963445A (en) * | 2005-11-09 | 2007-05-16 | 中国科学院金属研究所 | Testing method of endurance performance of tiny sample and implement apparatus |
| CN101446627A (en) * | 2008-12-18 | 2009-06-03 | 中国科学院微电子研究所 | Vertical variable magnetic field device |
| CN105261439A (en) * | 2015-10-30 | 2016-01-20 | 黑龙江大学 | Small-sized adjustable constant magnetic field apparatus |
| CN205752938U (en) * | 2016-05-03 | 2016-11-30 | 余爱身 | A kind of wire rod transmits tool |
| CN105891028A (en) * | 2016-06-01 | 2016-08-24 | 上海电缆研究所 | Metal wire vibration fatigue testing machine and metal wire vibration fatigue testing method |
| US20180192217A1 (en) * | 2017-01-04 | 2018-07-05 | Apple Inc. | Capacitive sensing of a moving-coil structure with an inset plate |
| CN206607199U (en) * | 2017-04-01 | 2017-11-03 | 中国石油大学(北京) | Device for magnetic treatment for improving waxy crude oil mobility |
| CN107686989A (en) * | 2017-07-21 | 2018-02-13 | 浙江工业大学 | A kind of electromagnetic field regulation device for laser manufacture |
| CN107478144A (en) * | 2017-07-27 | 2017-12-15 | 中国科学院高能物理研究所 | A kind of silk thread positioner and method based on quadrupole electromagnet and vibration line technology |
| CN108051316A (en) * | 2017-12-14 | 2018-05-18 | 辽宁工程技术大学 | Electromagnetic field induces ferrimagnet dynamic bending fatigue test device and method |
| CN108205117A (en) * | 2017-12-20 | 2018-06-26 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of Magnetic susceptibility test device for meeting DO-160G standards |
| CN110095334A (en) * | 2019-04-09 | 2019-08-06 | 三峡大学 | A kind of experimental provision and method using Ampere force simulation rock stress condition |
| CN110161081A (en) * | 2019-04-11 | 2019-08-23 | 浙江清华柔性电子技术研究院 | Conductive film bend resistance performance measurement method and measuring device |
| CN211478378U (en) * | 2019-09-25 | 2020-09-11 | 深圳市晶丰弘实业有限公司 | Electronic component test fixture |
| CN111610093A (en) * | 2020-05-27 | 2020-09-01 | 梅州市量能新能源科技有限公司 | Method for detecting tightness of lithium ion battery roll core |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4134067A (en) | Rotary eddy current flaw detector utilizing differentially unbalanced coils and the amplitude of a rotary induced pulse to produce the charging voltage for the sweep generator | |
| US3913084A (en) | Noise quality detector for electric motors or other machines | |
| GB2051364A (en) | Flaw detectinmg device and method | |
| CN114354413A (en) | Lead wire life tester, lead wire life testing system and lead wire life testing method | |
| EP0074355B1 (en) | Measuring instrument for checking the squeeze time in spot welding | |
| CN108732249B (en) | Multi-mode synchronous triggering control circuit and method in automatic ultrasonic detection system | |
| US5291128A (en) | Motor testing apparatus utilizing inertial loading | |
| US3823368A (en) | Calibration and balance system in pulse eddy current testing apparatus | |
| KR20020077260A (en) | Parts feeder and method of controlling the same | |
| US3990002A (en) | Method and apparatus for testing television yokes and flyback windings | |
| JP3443132B2 (en) | Method of detecting air gap deviation in rotor of rotary compressor motor and method of improving air gap deviation in rotor using the method of detecting deviation | |
| US5506508A (en) | Apparatus for detecting a shorted winding condition of a solenoid coil | |
| CN1073235C (en) | Apparatus and method for testing stator | |
| CN216770453U (en) | Concentricity and rotational speed detection device | |
| CN219891346U (en) | Cable fault test detection device | |
| CN110142232A (en) | A kind of insulating screw batch insulation performance testing device | |
| RU1810816C (en) | Method of detection of defects and device for its implementation | |
| CN216017156U (en) | Utilize electromagnetic induction control's fatigue tester | |
| CN112201125B (en) | Teaching device for visually judging homonymous terminal | |
| CN219695361U (en) | Circuit board detection equipment | |
| US6307383B1 (en) | Flyback transformer and yoke tester | |
| CN217543316U (en) | Control circuit board detector | |
| CN220819308U (en) | Vacuum testing machine | |
| CN209326575U (en) | Material thickness detection device | |
| CN210499879U (en) | Frock is detected in dismouting based on natural gas instrument |
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 |