CN116754103B - Thermistor testing device - Google Patents
Thermistor testing device Download PDFInfo
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- CN116754103B CN116754103B CN202311056590.5A CN202311056590A CN116754103B CN 116754103 B CN116754103 B CN 116754103B CN 202311056590 A CN202311056590 A CN 202311056590A CN 116754103 B CN116754103 B CN 116754103B
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- 238000012360 testing method Methods 0.000 title claims abstract description 25
- 241000270722 Crocodylidae Species 0.000 claims abstract description 40
- LNNWVNGFPYWNQE-GMIGKAJZSA-N desomorphine Chemical compound C1C2=CC=C(O)C3=C2[C@]24CCN(C)[C@H]1[C@@H]2CCC[C@@H]4O3 LNNWVNGFPYWNQE-GMIGKAJZSA-N 0.000 claims abstract description 40
- 230000007246 mechanism Effects 0.000 claims abstract description 36
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims description 40
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 25
- 229910052742 iron Inorganic materials 0.000 claims description 12
- 238000005476 soldering Methods 0.000 claims description 10
- 238000001179 sorption measurement Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 5
- 230000036760 body temperature Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K15/00—Testing or calibrating of thermometers
- G01K15/007—Testing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention belongs to the technical field of thermistors, in particular to a thermistor testing device, which comprises a supporting seat; the mounting seat is fixedly connected to the upper end surface of the supporting seat; the bottom of the placing circular plate is connected with the output end of the external motor through a rotating column, and the external motor is arranged in the mounting seat; at least one group of placing mechanisms, which are arranged on the upper end surface of the placing circular plate and are used for placing and fixing the thermistor; the L-shaped supporting plate is fixedly connected above the mounting seat; the detection mechanism is arranged at the telescopic end of the cylinder seat and is used for detecting the temperature of the thermistor at normal temperature and heating; through the design, the thermistor can be automatically heated and subjected to normal temperature detection, so that the problem that the temperature of a human body influences the test due to the fact that a worker holds the crocodile clip by hand and touches the thermistor body is avoided.
Description
Technical Field
The invention belongs to the technical field of thermistors, and particularly relates to a thermistor testing device.
Background
A thermistor is a sensor resistor whose resistance value changes with a change in temperature. The positive temperature coefficient thermistor and the negative temperature coefficient thermistor are classified according to the temperature coefficient. The resistance value of the positive temperature coefficient thermistor increases with the rise of temperature, and the resistance value of the negative temperature coefficient thermistor decreases with the rise of temperature, which belong to the semiconductor devices.
The thermistor is combined with a simple amplifying circuit, so that the temperature change of one thousandth can be detected, and the thermistor and an electronic instrument form a thermometer, so that high-precision temperature measurement can be completed; the working temperature of the thermistor for common use is-55 to +315 ℃, the working temperature of the special low-temperature thermistor can be measured to be ultralow temperature of-273 ℃, and the thermistor needs to be tested in the production process.
At present, when testing the thermistor, generally all staff holds the crocodile clamp, later presss from both sides crocodile clamp in thermistor's pin department, later detects whether thermistor's resistance is normal through the universal meter pointer, but when specific operation, the staff can be unavoidable touch the thermistor body, can lead to the problem that human temperature led to the fact the influence to the test.
To this end, the present invention provides a thermistor testing device.
Disclosure of Invention
In order to overcome the deficiencies of the prior art, at least one technical problem presented in the background art is solved.
The technical scheme adopted for solving the technical problems is as follows: the invention relates to a thermistor testing device, which comprises a supporting seat; the mounting seat is fixedly connected to the upper end surface of the supporting seat; the bottom of the placing circular plate is connected with the output end of the external motor through a rotating column, and the external motor is arranged in the mounting seat;
at least one group of placing mechanisms, which are arranged on the upper end surface of the placing circular plate and are used for placing and fixing the thermistor; the L-shaped supporting plate is fixedly connected above the mounting seat; the cylinder seat is fixedly connected below the transverse plate of the L-shaped supporting plate; the detection mechanism is arranged at the telescopic end of the cylinder seat and is used for detecting the temperature of the thermistor at normal temperature and heating.
Preferably, the detection mechanism comprises a rectangular plate fixedly connected to the telescopic end of the cylinder seat; the lower end face of the rectangular plate is fixedly connected with two vertical rods; crocodile clips are fixedly connected to the bottom ends of the two vertical rods; the L-shaped supporting plate consists of a vertical plate and a transverse plate; the side wall of the vertical rod of the L-shaped supporting plate is fixedly connected with a limiting mechanism, and the limiting mechanism is used for opening the crocodile clip; the outer side of the crocodile clip is connected with a universal meter through a power line; the universal meter is arranged on the upper end surface of the transverse plate of the L-shaped supporting plate; during operation, when the thermistor to be detected rotates to the lower part of the crocodile clamp along with the placement of the circular plate, when the telescopic end of the cylinder seat drives the rectangular plate to move downwards, the rectangular plate can simultaneously drive the vertical rod and the crocodile clamp to move downwards, and the crocodile clamp can be in contact with the limiting mechanism when moving downwards, so that the crocodile clamp is automatically opened and is in contact with the pins of the thermistor, then the crocodile clamp is separated from the limiting mechanism, the crocodile clamp is automatically closed, the pins of the thermistor are automatically clamped, the hands of a worker are prevented from touching the thermistor, and the problem that the temperature of a human body influences the test is caused.
Preferably, the crocodile clip consists of a clamping plate I and a clamping plate II; the top end surface of the first clamping plate is fixedly connected with the bottom end of the vertical rod; the second clamping plate is rotationally connected to the side wall of the first clamping plate; an arc-shaped bulge extends out of the end surface of the second clamping plate far away from the first clamping plate; the limiting mechanism comprises limiting plates arranged on the vertical plates of the L-shaped supporting plates, wherein the number of the limiting plates is two, and the limiting plates are arranged in one-to-one correspondence with the crocodile clips; an arc-shaped pressing plate is arranged on one side, close to the second clamping plate, of the limiting plate; when the clamping plate II and the clamping plate I move downwards, the arc-shaped protrusions on the side walls of the clamping plate II are contacted with the arc-shaped pressing plate.
Preferably, a groove is formed in one side, close to the second clamping plate, of the first clamping plate, and the second clamping plate is rotationally connected in the groove of the first clamping plate through a rotating shaft; the outer surface of the rotating shaft is sleeved with a torsion spring I; in order to ensure that the clamping plate II and the clamping plate I can be stably clamped at the thermistor pin; when the clamping plate II rotates to one side far away from the clamping plate I, the clamping plate II simultaneously drives the rotating shaft to rotate, and the torsion spring I contracts, when the arc-shaped protrusions on the two end surfaces of the clamping plate II are not in contact with the arc-shaped pressing plate, namely, the clamping plate II and the clamping plate I just move to the pin position capable of completely clamping the thermistor, the torsion spring I is not stressed and is recovered, so that the clamping plate II can be driven to rotate to be close to the clamping plate I, the clamping plate II and the clamping plate I can be tightly combined with the pin of the thermistor, and the problem of inaccurate detection caused by poor contact between the clamping plate II and the clamping plate I is avoided.
Preferably, the side wall of the vertical plate of the L-shaped supporting plate is fixedly connected with two fixing frames; the limiting plate is rotationally connected in the fixing frame through the rotating rod; the side wall of the L-shaped supporting plate is fixedly connected with a limiting frame; the limiting frame is positioned below the limiting plate, and the upper end face of the limiting frame is contacted with the lower end face of the limiting plate but is not fixedly connected with the lower end face of the limiting plate.
Preferably, a hole groove matched with the rotating rod is formed in the fixing frame, and a torsion spring II is sleeved on the outer peripheral surface of the rotating rod; the second torsion spring is arranged at a hole groove in the fixing frame.
Preferably, one side of the first clamping plate, which is close to the second clamping plate, is fixedly connected with an electric telescopic rod; the upper surface of the second clamping plate is fixedly connected with a hand pressing plate; the telescopic end of the electric telescopic rod is hinged with the side wall of the hand pressing plate.
Preferably, an electric push rod is fixedly connected to one side, close to the L-shaped supporting plate, of the upper end surface of the mounting seat; and an electric soldering iron is fixedly connected to the telescopic end of the electric push rod.
Preferably, the placing mechanism comprises a placing frame fixedly connected to the upper end surface of the placing circular plate; the placing frames are arranged in a plurality and are arranged on the upper end face of the placing circular plate in a circumferential array; the upper end face of the placement frame is provided with a groove for placing a thermistor; during operation, through having set up the frame of placing, and the groove has been seted up on its surface, can be convenient for place thermistor, later make things convenient for its rotation to splint two and splint one side.
Preferably, an adsorption hole is formed in each placement frame; a suction pipe is fixedly connected in the adsorption hole; one side of the suction pipe, which is far away from the adsorption hole, is connected with an external air pump, and the external air pump is arranged on the lower end surface of the placing circular plate; when the thermistor is placed on the surface of the placement frame, the external air pump is controlled to pump air from the suction pipe, so that the suction hole is in a negative pressure state, the thermistor is tightly adsorbed on the end part of the placement frame, and the problem that the thermistor is separated from the end part of the placement frame due to the centrifugal force of the placement circular plate in the rotation process is avoided.
The beneficial effects of the invention are as follows:
1. according to the thermistor testing device, the arc-shaped bulge of the clamping plate II is gradually separated from the arc-shaped pressing plate, and the clamping plate II and the clamping plate I just move to the pins capable of completely clamping the thermistor; then under the recovery of splint two, splint one and splint two can handle thermistor's pin centre gripping, through this kind of design, can handle thermistor's pin automatic centre gripping, it is comparatively convenient to use, avoids staff's hand to touch the thermistor body, leads to the problem that human temperature led to the fact the influence to the test.
2. According to the thermistor testing device, when the clamping plate II and the clamping plate I just move to the position where the thermistor can be clamped completely, the torsion spring I is not stressed and recovered, so that the clamping plate II is driven to rotate close to one side of the clamping plate I, the clamping plate II and the clamping plate I can be combined with the thermistor pin tightly, and the problem of inaccurate detection caused by poor contact between the clamping plate II and the clamping plate I is avoided.
3. According to the thermistor testing device, the clamping plate II rotates to the side far away from the clamping plate I, so that the clamping plate II is separated from the pin of the thermistor from the clamping plate I, then the telescopic end of the cylinder seat drives the rectangular plate and the vertical rod, and the clamping plate II and the clamping plate I are far away from the pin of the thermistor, and then the detected thermistor can be taken out, so that the subsequent processing of the thermistor is facilitated.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a schematic view of a portion of an L-shaped stay plate according to the present invention;
FIG. 4 is an enlarged view of the structure of FIG. 3A in accordance with the present invention;
FIG. 5 is a schematic view of the first and second clamping plates of the present invention;
FIG. 6 is a schematic view of a part of the structure of a fixing frame in the invention;
FIG. 7 is a schematic view showing the structure of the arc-shaped protrusion moving downward in the present invention;
FIG. 8 is a schematic diagram of clamping thermistor structures of clamping plates one and two in the invention;
fig. 9 is a schematic view of a portion of the structure of a placement frame in the present invention.
In the figure: 1. a support base; 2. a mounting base; 3. placing a circular plate; 4. an L-shaped supporting plate; 5. a cylinder block; 6. a rectangular plate; 601. a vertical rod; 7. crocodile clips; 701. a clamping plate I; 702. a clamping plate II; 8. a multimeter; 9. arc-shaped bulges; 10. a limiting plate; 101. a rotating rod; 11. an arc-shaped pressing plate; 12. a rotating shaft; 13. a torsion spring I; 14. a fixing frame; 15. a limiting frame; 16. a torsion spring II; 17. an electric telescopic rod; 18. a hand pressing plate; 19. an electric push rod; 20. an electric iron; 21. placing a frame; 22. adsorption holes; 23. and (3) sucking pipe.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
Embodiment one: as shown in fig. 1 to 6, the thermistor testing device according to the embodiment of the present invention includes:
a support base 1;
the mounting seat 2 is fixedly connected to the upper end face of the supporting seat 1;
the placing circular plate 3 is rotatably connected to the upper end face of the mounting seat 2, the bottom of the placing circular plate 3 is connected with the output end of the external motor through a rotating column, and the external motor is mounted in the mounting seat 2;
at least one group of placing mechanisms, which are arranged on the upper end surface of the placing circular plate 3 and are used for placing and fixing the thermistor;
the L-shaped supporting plate 4 is fixedly connected above the mounting seat 2;
the cylinder seat 5 is fixedly connected below the transverse plate of the L-shaped supporting plate 4;
the detection mechanism is arranged at the telescopic end of the cylinder seat 5 and is used for detecting the temperature of the thermistor at normal temperature and heating;
the universal meter 8 is fixedly connected to the upper end face of the L-shaped supporting plate 4;
when the device works, a thermistor to be detected is placed on the placement mechanism on the upper surface of the placement circular plate 3, the placement mechanism is used for fixing the thermistor, then the output end of the external motor is driven to drive the placement circular plate 3 to rotate, the placement circular plate 3 drives the thermistor on the end face of the placement mechanism to rotate below the L-shaped supporting plate 4, and then the telescopic end of the cylinder seat 5 is driven to drive the detection mechanism to move downwards, so that the detection mechanism detects the thermistor at normal temperature and carries out heating detection treatment;
during detection, 8 ohm grade of the universal meter is used, the indoor temperature is detected at normal temperature (approximately 25 ℃), the actual resistance value is detected through the detection mechanism and is compared with the standard resistance value, the difference between the actual resistance value and the standard resistance value is normal within +/-2 omega, and if the difference between the actual resistance value and the standard resistance value is too large, poor performance or damage is indicated; through the design, the thermistor can be automatically heated and subjected to normal temperature detection, so that the problem that the temperature of a human body influences the test due to the fact that a worker holds the crocodile clip 7 by hand and touches the thermistor body is avoided.
As shown in fig. 2 to 6, the detection mechanism comprises a rectangular plate 6 fixedly connected to the telescopic end of the cylinder block 5; two vertical rods 601 are fixedly connected to the lower end face of the rectangular plate 6; the bottom ends of the two vertical rods 601 are fixedly connected with crocodile clips 7; the L-shaped supporting plate 4 consists of a vertical plate and a transverse plate; a limiting mechanism is fixedly connected to the side wall of the vertical plate of the L-shaped supporting plate 4 and used for opening the crocodile clip 7; the outer side of the crocodile clip 7 is connected into a universal meter 8 through a power wire; during operation, when the thermistor to be detected rotates to the lower side of the crocodile clamp 7 along with the placement of the circular plate 3, when the telescopic end of the cylinder seat 5 drives the rectangular plate 6 to move downwards, the rectangular plate 6 simultaneously drives the vertical rod 601 and the crocodile clamp 7 to move downwards, and the crocodile clamp 7 contacts with the limiting mechanism when moving downwards, so that the crocodile clamp 7 is automatically opened and contacts with the pins of the thermistor, and then the crocodile clamp 7 is separated from the limiting mechanism, the crocodile clamp 7 is automatically closed, so that the pins of the thermistor are automatically clamped, and the problem that the human body temperature influences the test due to the fact that a worker touches the thermistor body is avoided.
As shown in fig. 3 to 7, the crocodile clip 7 is composed of a first clamping plate 701 and a second clamping plate 702; the top end surface of the first clamping plate 701 is fixedly connected with the bottom end of the vertical rod 601; the second clamping plate 702 is rotatably connected to the side wall of the first clamping plate 701; an arc-shaped protrusion 9 extends from the end surface of the second clamping plate 702 away from the first clamping plate 701; the limiting mechanism comprises limiting plates 10 arranged on vertical plates of the L-shaped supporting plates 4, wherein the number of the limiting plates 10 is two, and the limiting plates are arranged in one-to-one correspondence with the crocodile clips 7; an arc-shaped pressing plate 11 is arranged on one side of the limiting plate 10, which is close to the clamping plate II 702; when the clamping plate two 702 and the clamping plate one 701 move downwards, the arc-shaped protrusions 9 on the side wall of the clamping plate two 702 are contacted with the arc-shaped pressing plate 11;
when the clamp plate I701 and the clamp plate II 702 are driven by the vertical rod 601 to move downwards, the arc-shaped pressing plate 11 is contacted with the lower side of the arc-shaped protrusion 9, and as the clamp plate I701 and the clamp plate II 702 are continuously pressed downwards, the arc-shaped pressing plate 11 can give a certain pressure to the arc-shaped protrusion 9 and the clamp plate II 702, so that the clamp plate II 702 rotates towards the side far away from the clamp plate I701, the opening of the crocodile clamp 7 is opened, at the moment, the pin of the thermistor is just positioned at the lower side between the clamp plate II 702 and the clamp plate I701, as shown in fig. 7 (at the moment, the arc-shaped protrusion 9 is positioned above the arc-shaped pressing plate 11), and as the clamp plate II 702 and the clamp plate I701 continue to move downwards, the arc-shaped protrusion 9 of the clamp plate II 702 is gradually separated from the arc-shaped pressing plate 11, at the moment, and the clamp plate II 702 just moves to the pin capable of completely clamping the thermistor as shown in fig. 8 (at the moment, the arc-shaped protrusion 9 is positioned below the arc-shaped pressing plate 11); then under the recovery of the clamping plate II 702, the clamping plate I701 and the clamping plate II 702 can clamp the pins of the thermistor, and through the design, the pins of the thermistor can be automatically clamped, so that the use is convenient, and the problem that the human body temperature affects the test due to the fact that a worker touches the thermistor body by hand is avoided;
then, the multimeter 8 is observed to display numbers, and the numbers are compared with the standard resistance, the difference between the numbers is normal within +/-2 omega, if the actual resistance is too large compared with the standard resistance, the performance of the multimeter is poor or damaged, and if the multimeter is damaged, a worker takes the multimeter out of the multimeter by himself;
the detection environment should be room temperature (approximately 25 ℃), so that the problem of inaccurate detection caused by too high or too low temperature on the thermistor detection is avoided.
As shown in fig. 3 to 8, in order to ensure that the clamping plate two 702 and the clamping plate one 701 can be stably clamped at the thermistor pin; a groove is formed on one side of the first clamping plate 701, which is close to the second clamping plate 702, and the second clamping plate 702 is rotatably connected in the groove of the first clamping plate 701 through the rotating shaft 12; the outer surface of the rotating shaft 12 is sleeved with a torsion spring I13;
when the clamping plate two 702 rotates to the side far away from the clamping plate one 701, the clamping plate two 702 simultaneously drives the rotating shaft 12 to rotate and enables the torsion spring one 13 to shrink, when the arc-shaped bulge 9 on the end face of the clamping plate two 702 is not contacted with the arc-shaped pressing plate 11, namely, the clamping plate two 702 and the clamping plate one 701 just move to the position where the thermistor pin can be completely clamped, the torsion spring one 13 is not stressed and recovered, so that the clamping plate two 702 can be driven to rotate to the side close to the clamping plate one 701, the clamping plate two 702 and the clamping plate one 701 can be tightly combined with the thermistor pin, and the problem of inaccurate detection caused by poor contact between the clamping plate two 702 and the clamping plate one 701 is avoided.
As shown in fig. 3 to 8, two fixing frames 14 are fixedly connected to the side walls of the vertical plates of the L-shaped supporting plates 4; the limiting plate 10 is rotatably connected in the fixed frame 14 through a rotating rod 101; the side wall of the L-shaped supporting plate 4 is fixedly connected with a limit frame 15; the limiting frame 15 is positioned below the limiting plate 10, and the upper end surface of the limiting frame 15 is contacted with the lower end surface of the limiting plate 10 but not fixedly connected with the lower end surface of the limiting plate, so that the limiting plate 10 can conveniently rotate in one direction; when the clamping plate II 702 and the arc-shaped bulge 9 move downwards in operation, and the arc-shaped bulge 9 is contacted with the arc-shaped pressing plate 11, the limiting frame 15 is arranged below the limiting plate 10, so that the limiting plate 10 only gives a certain supporting force to the arc-shaped bulge 9 and the clamping plate II 702 at the moment, and the clamping plate II 702 can move towards the side far away from the clamping plate I701 conveniently; after the detection is completed, when the clamping plate two 702 and the clamping plate one 701 are separated from the thermistor pin, the telescopic end of the control cylinder seat 5 drives the clamping plate two 702 and the clamping plate one 701 to move upwards, then the arc-shaped bulge 9 is contacted with the arc-shaped pressing plate 11, so that the arc-shaped pressing plate 11 drives the limiting plate 10 to rotate towards one side close to the L-shaped supporting plate 4 until the arc-shaped bulge 9 is separated from the arc-shaped pressing plate 11, and then the arc-shaped pressing plate 11 is restored to an initial state according to the gravity.
A hole groove matched with the rotating rod 101 is formed in the fixed frame 14, and a torsion spring II 16 is sleeved on the outer peripheral surface of the rotating rod 101; the second torsion spring 16 is arranged at a hole groove in the fixed frame 14;
when the arc-shaped pressing plate 11 drives the limiting plate 10 to rotate towards the side close to the L-shaped supporting plate 4, the limiting plate 10 simultaneously drives the rotating rod 101 to rotate, the torsion spring II 16 on the outer peripheral surface of the limiting plate is contracted, and when the arc-shaped bulge 9 is separated from the arc-shaped pressing plate 11, the torsion spring II 16 drives the rotating rod 101 and the limiting plate 10 to recover again, so that the limiting plate 10 is convenient to reuse and detection of a subsequent thermistor is convenient.
An electric telescopic rod 17 is fixedly connected to one side of the first clamping plate 701, which is close to the second clamping plate 702; the upper surface of the second clamping plate 702 is fixedly connected with a hand pressing plate 18; the telescopic end of the electric telescopic rod 17 is hinged with the side wall of the hand pressing plate 18; when the thermistor is detected, a worker controls the telescopic end of the electric telescopic rod 17 to drive the hand pressing plate 18 and the clamping plate II 702 to rotate, the clamping plate II 702 can rotate towards the side away from the clamping plate I701, the clamping plate II 702 is separated from the clamping plate I701 and the pins of the thermistor, the telescopic end of the cylinder seat 5 drives the rectangular plate 6 and the vertical rod 601 and the clamping plate II 702 and the clamping plate I701 to be away from the pins of the thermistor, and then the detected thermistor can be taken out, so that the subsequent processing of the thermistor is facilitated.
An electric push rod 19 is fixedly connected to one side, close to the L-shaped supporting plate 4, of the upper end surface of the mounting seat 2; an electric iron 20 is fixedly connected to the telescopic end of the electric push rod 19;
when the temperature-measuring device works, if the normal temperature measurement of the thermistor is normal, the second-step heating detection can be performed, the electric push rod 19 is controlled to operate, the telescopic end of the electric push rod drives the electric soldering iron 20 to move close to the thermistor, the electric soldering iron is heated, the indication of the universal meter 8 is observed, at the moment, if the universal indication changes along with the temperature rise, the surface resistance value is gradually changed, when the resistance value is changed to a certain value, the display data are gradually stabilized, the thermistor is normal, and if the resistance value is unchanged, the performance of the electric soldering iron is deteriorated, and the electric soldering iron cannot be continuously used;
the negative temperature coefficient thermistor NTC resistance becomes smaller and the positive temperature coefficient thermistor PTC resistance becomes larger.
As shown in fig. 3 to 9, the above-mentioned placing mechanism includes a placing frame 21 fixedly connected to the upper end surface of the placing circular plate 3; the placing frames 21 are arranged in a plurality and are arranged on the upper end surface of the placing circular plate 3 in a circumferential array; a groove for placing the thermistor is arranged on the upper end surface of the placement frame 21; in operation, by providing the placement frame 21 and providing the grooves on the surface thereof, the placement of the thermistor can be facilitated, and then the thermistor can be conveniently rotated to the side of the clamping plate two 702 and the clamping plate one 701.
An adsorption hole 22 is formed in each of the placement frames 21; a suction pipe 23 is fixedly connected in the suction hole 22; one side of the suction pipe 23 far away from the adsorption hole 22 is connected with an external air pump which is arranged on the lower end surface of the placing circular plate 3; when the thermistor is placed on the surface of the placement frame 21 in operation, the external air pump is controlled to pump air from the suction pipe 23, so that the suction hole 22 is in a negative pressure state, the thermistor is tightly sucked at the end part of the placement frame 21, and the problem that the thermistor is separated from the end part of the placement frame 21 due to the centrifugal force of the placement circular plate 3 in the rotation process is avoided.
When the device works, a thermistor to be detected is placed in the placement frame 21 for placing the circular plate 3, the external air pump is controlled to pump air from the suction pipe 23, so that the suction hole 22 is in a negative pressure state, the thermistor is tightly adsorbed at the end part of the placement frame 21, then the output end of the external motor is driven to drive the placement circular plate 3 to rotate, the placement circular plate 3 drives the thermistor at the end surface of the placement mechanism to rotate below the L-shaped supporting plate 4, and then the telescopic end of the cylinder seat 5 is driven to drive the detection mechanism to move downwards, so that the detection mechanism detects the thermistor at normal temperature and carries out heating detection treatment;
when the thermistor to be detected rotates below the crocodile clamp 7 along with the placement of the circular plate 3, when the telescopic end of the cylinder seat 5 drives the rectangular plate 6 to move downwards, the rectangular plate 6 simultaneously drives the vertical rod 601 and the crocodile clamp 7 to move downwards, and the crocodile clamp 7 contacts with the limiting mechanism when moving downwards, so that the crocodile clamp 7 is automatically opened and contacts with the pins of the thermistor, and then the crocodile clamp 7 is separated from the limiting mechanism, the crocodile clamp 7 is automatically closed, so that the pins of the thermistor are automatically clamped, and the problem that the human body temperature influences the test due to the fact that a worker touches the thermistor body is avoided;
when the vertical rod 601 drives the clamp plate I701 and the clamp plate II 702 to move downwards, the arc-shaped pressing plate 11 is contacted with the lower side of the arc-shaped protrusion 9, and as the clamp plate I701 and the clamp plate II 702 are continuously pressed down, the arc-shaped pressing plate 11 can give a certain pressure to the arc-shaped protrusion 9 and the clamp plate II 702, so that the clamp plate II 702 rotates towards the side far away from the clamp plate I701, the opening of the crocodile clamp 7 is opened, at the moment, the pin of the thermistor is just positioned at the lower side between the clamp plate II 702 and the clamp plate I701, as shown in fig. 7 (at the moment, the arc-shaped protrusion 9 is positioned above the arc-shaped pressing plate 11), and as the clamp plate II 702 and the clamp plate I701 continue to move downwards, the arc-shaped protrusion 9 of the clamp plate II 702 is gradually separated from the arc-shaped pressing plate 11, at the moment, and the clamp plate II 702 and the clamp plate I701 just move to the pin capable of completely clamping the thermistor, as shown in fig. 8 (at the moment, the arc-shaped protrusion 9 is positioned below the arc-shaped pressing plate 11); then under the recovery of the clamping plate II 702, the clamping plate I701 and the clamping plate II 702 can clamp the pins of the thermistor, and through the design, the pins of the thermistor can be automatically clamped, so that the use is convenient, and the problem that the human body temperature affects the test due to the fact that a worker touches the thermistor body by hand is avoided;
then, the multimeter 8 is observed to display numbers, and the numbers are compared with the standard resistance, the difference between the numbers is normal within +/-2 omega, if the actual resistance is too large compared with the standard resistance, the performance of the multimeter is poor or damaged, and if the multimeter is damaged, a worker takes the multimeter out of the multimeter by himself;
it should be noted that, the detection environment should be room temperature (approximately 25 ℃), so as to avoid the problem of inaccurate detection caused by too high or too low temperature on the detection of the thermistor;
when the clamping plate II 702 and the arc-shaped bulge 9 move downwards and the arc-shaped bulge 9 is contacted with the arc-shaped pressing plate 11, the limiting frame 15 is arranged below the limiting plate 10, so that the limiting plate 10 only gives a certain supporting force to the arc-shaped bulge 9 and the clamping plate II 702 at the moment, and the clamping plate II 702 can move towards the side far away from the clamping plate I701 conveniently; when the clamping plate two 702 and the clamping plate one 701 are separated from the pins of the thermistor after the detection is finished at one time, at the moment, the telescopic end of the control cylinder seat 5 drives the clamping plate two 702 and the clamping plate one 701 to move upwards, then the arc-shaped bulge 9 is contacted with the arc-shaped pressing plate 11, so that the arc-shaped pressing plate 11 drives the limiting plate 10 to rotate towards one side close to the L-shaped supporting plate 4 until the arc-shaped bulge 9 is separated from the arc-shaped pressing plate 11, and then the arc-shaped pressing plate 11 is restored to an initial state according to the gravity;
if the normal temperature test of the thermistor is normal, the second heating detection can be performed, the electric push rod 19 is controlled to operate, the telescopic end of the electric push rod drives the electric soldering iron 20 to move close to the thermistor, the electric soldering iron is heated, the indication of the universal meter 8 is observed, if the universal indication changes along with the increase of the temperature, the surface resistance value is gradually changed, the display data are gradually stabilized when the resistance value is changed to a certain value, the thermistor is normal, if the resistance value is unchanged, the performance of the electric soldering iron is deteriorated, and the electric soldering iron cannot be continuously used;
the negative temperature coefficient thermistor NTC resistance becomes smaller and the positive temperature coefficient thermistor PTC resistance becomes larger.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. A thermistor testing device, characterized in that: the test device comprises:
a support base (1);
the mounting seat (2) is fixedly connected to the upper end face of the supporting seat (1);
the placing circular plate (3), the placing circular plate (3) is rotationally connected to the upper end face of the mounting seat (2), the bottom of the placing circular plate (3) is connected with the output end of the external motor through the rotating column, and the external motor is mounted in the mounting seat (2);
at least one group of placing mechanisms, which are arranged on the upper end surface of the placing circular plate (3) and are used for placing and fixing the thermistor;
the L-shaped supporting plate (4), the L-shaped supporting plate (4) is fixedly connected above the mounting seat (2), and the L-shaped supporting plate (4) is composed of a vertical plate and a transverse plate;
the cylinder seat (5) is fixedly connected below the transverse plate of the L-shaped supporting plate (4);
the detection mechanism is arranged at the telescopic end of the cylinder seat (5) and is used for detecting the temperature of the thermistor at normal temperature and heating;
the universal meter (8) is fixedly connected to the upper end face of the L-shaped supporting plate (4);
the detection mechanism comprises a rectangular plate (6) fixedly connected to the telescopic end of the cylinder seat (5); two vertical rods (601) are fixedly connected to the lower end face of the rectangular plate (6); the bottom ends of the two vertical rods (601) are fixedly connected with crocodile clips (7); a limiting mechanism is fixedly connected to the side wall of the vertical plate of the L-shaped supporting plate (4) and used for opening the crocodile clip (7); the outer side of the crocodile clip (7) is connected into the universal meter (8) through a power wire;
the crocodile clip (7) consists of a clamping plate I (701) and a clamping plate II (702); the top end surface of the first clamping plate (701) is fixedly connected with the bottom end of the vertical rod (601); the clamping plate II (702) is rotatably connected to the side wall of the clamping plate I (701); an arc-shaped bulge (9) extends from the end surface of the clamping plate II (702) away from the clamping plate I (701); the limiting mechanism comprises limiting plates (10) arranged on vertical plates of the L-shaped supporting plates (4), wherein the number of the limiting plates (10) is two, and the limiting plates are arranged in one-to-one correspondence with the two crocodile clips (7); an arc-shaped pressing plate (11) is arranged on one side, close to the second clamping plate (702), of the limiting plate (10); when the clamping plate II (702) and the clamping plate I (701) move downwards, the arc-shaped protrusions (9) on the side wall of the clamping plate II (702) are contacted with the arc-shaped pressing plate (11); a groove is formed in one side, close to the second clamping plate (702), of the first clamping plate (701), and the second clamping plate (702) is rotationally connected in the groove of the first clamping plate (701) through a rotating shaft (12); the outer surface of the rotating shaft (12) is sleeved with a torsion spring I (13);
two fixing frames (14) are fixedly connected to the side walls of the vertical plates of the L-shaped supporting plates (4); the limiting plate (10) is rotationally connected in the fixing frame (14) through the rotating rod (101); the side wall of the L-shaped supporting plate (4) is fixedly connected with a limiting frame (15); the limiting frame (15) is positioned below the limiting plate (10), and the upper end surface of the limiting frame (15) is contacted with the lower end surface of the limiting plate (10) but is not fixedly connected with the lower end surface of the limiting plate; a hole groove matched with the rotating rod (101) is formed in the fixing frame (14), and a torsion spring II (16) is sleeved on the outer peripheral surface of the rotating rod (101); the torsion spring II (16) is arranged at a hole groove in the fixing frame (14);
an electric telescopic rod (17) is fixedly connected to one side, close to the second clamping plate (702), of the first clamping plate (701); the upper surface of the second clamping plate (702) is fixedly connected with a hand pressing plate (18); the telescopic end of the electric telescopic rod (17) is hinged with the side wall of the hand pressing plate (18); an electric push rod (19) is fixedly connected to one side, close to the L-shaped supporting plate (4), of the upper end surface of the mounting seat (2); an electric soldering iron (20) is fixedly connected to the telescopic end of the electric push rod (19).
2. A thermistor testing device according to claim 1, characterized in that: the placing mechanism comprises a placing frame (21) fixedly connected to the upper end face of the placing circular plate (3); the placing frames (21) are arranged in a plurality and are arranged on the upper end face of the placing circular plate (3) in a circumferential array; the upper end face of the placement frame (21) is provided with a groove for placing the thermistor.
3. A thermistor testing device according to claim 2, characterized in that: an adsorption hole (22) is formed in each placement frame (21); a suction pipe (23) is fixedly connected in the adsorption hole (22); one side of the suction pipe (23) far away from the adsorption hole (22) is connected with an external air pump, and the external air pump is arranged on the lower end surface of the placing circular plate (3).
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| CN202311056590.5A CN116754103B (en) | 2023-08-22 | 2023-08-22 | Thermistor testing device |
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| CN202311056590.5A CN116754103B (en) | 2023-08-22 | 2023-08-22 | Thermistor testing device |
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| CN116754103B true CN116754103B (en) | 2023-12-26 |
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| CN117030066B (en) * | 2023-09-28 | 2023-12-29 | 孚创动力控制技术（启东）有限公司 | Constant temperature detection device for temperature sensor |
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