CN207557352U - A kind of thermistor selection test tooling - Google Patents
A kind of thermistor selection test tooling Download PDFInfo
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- CN207557352U CN207557352U CN201721867981.5U CN201721867981U CN207557352U CN 207557352 U CN207557352 U CN 207557352U CN 201721867981 U CN201721867981 U CN 201721867981U CN 207557352 U CN207557352 U CN 207557352U
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- resistance
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- 238000012360 testing method Methods 0.000 title claims abstract description 64
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 238000002955 isolation Methods 0.000 claims description 18
- 230000005611 electricity Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 1
- 230000001681 protective effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
The utility model discloses a kind of thermistor selection test toolings, are related to selection test technical field.It is used to clamp the fixture of testing resistance including tooling platform and set on tooling platform, tooling platform is equipped with for the voltage source of the testing resistance power supply in fixture, fixture is electrically connected with voltage source, tooling platform is equipped with for the current source of the testing resistance power supply in fixture, fixture is electrically connected with current source, tooling platform is equipped with the multimeter for the testing resistance that detection is located in fixture, and fixture is electrically connected with multimeter.The utility model is integrated with the equipment such as voltage source, current source and multimeter; can simulate ammeter it is various in the case of operating current; it thus passes to the electric current whether to mutate to test thermistor resistance value, so as to judge whether the temperature-sensitive plays a protective role in actual power table.
Description
Technical field
The utility model is related to selection test technical fields, and in particular to a kind of thermistor selection test tooling.
Background technology
State's net single-phase smart meter all has over-voltage protection function, which is to prevent power grid earth fault
When causing the line voltage to be increased to 380V, electric energy meter normal work is not damaged.State's net single-phase smart meter is generally using PTC (just at present
Temperature coefficient) thermistor protects electric energy meter rear stage circuit.Protection philosophy is to utilize PTC thermistor acting characteristic, heat
Quick resistance is connected with the input of transformer primary side, when electric energy meter operating current is less than thermistor non-operating current, thermistor
Resistance value very little, input voltage do not influence the power supply of rear stage circuit in the voltage very little of temperature-sensitive.When electric energy meter operating current is more than heat
During quick resistance action current, thermistor resistance value meeting wink speed increases, and external input voltage can generate very big voltage in temperature-sensitive,
Reduce transformer primary side input voltage, protect rear stage circuit.
Since current electric energy meter is when designing and developing, it is impossible to effectively to the non-operating current of thermistor and action current
Effective type selecting and simulation test are carried out, and there are Interval Discrete (such as resistances in certain temperature range for thermistor resistance value
Value is at 200 ohm -400 ohm).Therefore this type selecting tooling can simulate the thermistor acting characteristic electric current of needs, to electricity
Critically important verification is played the role of in the exploitation of energy table and production testing test.
Utility model content
In view of the deficiencies of the prior art, the utility model discloses a kind of thermistor selection test tooling, can solve existing
There is the problem of lacking thermistor selection test equipment.
In order to achieve the above object, the utility model is achieved by the following technical programs：
A kind of thermistor selection test tooling is used to clamp the folder of testing resistance including tooling platform and set on tooling platform
Tool, tooling platform are equipped with for the voltage source of the testing resistance power supply in fixture, fixture to be electrically connected with voltage source, tooling platform
Equipped with for the current source of the testing resistance power supply in fixture, fixture to be electrically connected with current source, and tooling platform is equipped with detection
The multimeter of testing resistance in fixture, fixture are electrically connected with multimeter.
Further, be equipped between the voltage source and fixture for control connecting and disconnecting of the circuit between voltage source and fixture the
One air-isolation switchs, and one end of the first air-isolation switch is electrically connected with voltage source, the other end of the first air-isolation switch
It is electrically connected with fixture.
Further, be equipped between the current source and fixture for control connecting and disconnecting of the circuit between current source and fixture the
Two air-isolations switch, and one end of the second air-isolation switch is electrically connected with current source, the other end of the second air-isolation switch
It is electrically connected with fixture.
Further, the fixture is equipped with the rocker switch of control fixture connection voltage source or current source, rocker switch
The terminals of both sides are electrically connected respectively with voltage source and current source, and the terminals among rocker switch are electrically connected with fixture.
Further, the limit for limiting size of current between current source and fixture is equipped between the current source and fixture
Leakage resistance, one end of current-limiting resistance are electrically connected with current source, and the other end of current-limiting resistance is electrically connected with fixture.
Further, the fixture is including the fixed part for installing testing resistance and for locking testing resistance activity
Portion, above fixed part, movable part is flexibly connected moving part with fixed part.
Further, the fixture further includes the fixing piece for connecting portion and movable part, and fixing piece is passed through and is set on
The through-hole of movable part is simultaneously threadedly coupled with the threaded hole set on fixed part, and fixing piece is equipped with along the convex of the circumferentially extending of fixing piece
It rises, raised diameter is more than the diameter of through-hole, and movable part is pressed to fixed part by protrusion.
Further, the fixed part is equipped with the mounting hole stretched into for testing resistance pin, and movable part is equipped with and installation
The lock hole of hole cooperation, the outer wall of lock hole gradually increase towards one end of mounting hole to one end diameter far from mounting hole, lock
The diameter for determining outer wall towards the one end of mounting hole in hole is less than the diameter of mounting hole.
Further, the conducting end to pin powered is equipped in the mounting hole, pin is electrically connected with conducting end.
The utility model discloses a kind of thermistor selection test tooling, is integrated with voltage source, current source and multimeter etc.
Equipment, can simulate ammeter it is various in the case of operating current, thus pass to the electric current whether to test thermistor resistance value
It mutates, so as to judge whether the temperature-sensitive plays a protective role in actual power table.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the overlooking the structure diagram of the utility model embodiment；
Fig. 2 is the half section structure diagram of fixture in the utility model embodiment.
1, voltage source in figure, 2, voltage link column, 3, current source, 4, electric current binding post, 5, multimeter, 6, instrument wiring
Column, the 7, first air-isolation switch, the 8, second air-isolation switch, 9, rocker switch, 10, fixture, 11, current-limiting resistance, 12, work
Fill platform, 13, fixing piece, 14, movable part, 15, fixed part, 16, pin, 17, protrusion, 18, through-hole, 19, screw thread, 20, threaded hole,
21st, conducting end, 22, mounting hole, 23, lock hole.
Specific embodiment
Purpose, technical scheme and advantage to make the utility model embodiment are clearer, new below in conjunction with this practicality
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, those of ordinary skill in the art's all other embodiments obtained without making creative work, belongs to
The range of the utility model protection.
As shown in Figure 1 to Figure 2, a kind of thermistor selection test tooling described in the utility model embodiment, including tooling
Platform 12 and the fixture 10 for being used to clamp testing resistance set on tooling platform 12, fixture 10 are fixed by screws on tooling platform 12.
Tooling platform 12 is equipped with for the voltage source 1 of the testing resistance power supply in fixture 10, voltage source 1 to exist for voltage
Adjustable alternating-current voltage source 1 between 0~400VAC, voltage source 1 connect electricity by voltage link column 2, and voltage source 1 is according to test needs
The alternating voltage of different numerical value is provided to testing resistance, to simulate the load of testing resistance in practical work process, fixture 10 with
Voltage source 1 is electrically connected by conducting wire, and conducting wire is embedded in tooling platform 12, is reduced inconvenience during operation, is also improved tooling platform
12 whole aesthetics.
Tooling platform 12 is equipped with the current source 3 for powering to the testing resistance in fixture 10, and current source 3 is for electric current
The Constant Direct Current electric current source 3 of 0-200mA, current source 3 connects electricity by electric current binding post 4, by being failure to actuate to testing resistance offer
Electric current or action current, to simulate the working characteristics of testing resistance, fixture 10 is electrically connected with current source 3 by conducting wire.
Tooling platform 12 is equipped with the multimeter 5 for the testing resistance that detection is located in fixture 10, by the both ends of fixture 10
On binding post to the resistance value of testing resistance, by the numerical value such as voltage and current measure, so as to facilitate statistics and analysis, folder
Tool 10 is electrically connected with the instrument terminal 6 on multimeter 5 by conducting wire.It should be understood that multimeter 5 can also replace with model
For the thermistor tester of HG2515, the purpose measured to testing resistance can be equally completed.
It is equipped with to control first of connecting and disconnecting of the circuit between voltage source 1 and fixture 10 to be isolated between voltage source 1 and fixture 10
Air switch 7, one end binding post of the first air-isolation switch 7 are electrically connected with voltage source 1 by conducting wire, and the first air-isolation is opened
The other end binding post of pass 7 is electrically connected with fixture 10 by conducting wire, on the one hand can need active control circuit according to test
On the other hand break-make also can provide safety guarantee for circuit.
It is equipped with to control second of connecting and disconnecting of the circuit between current source 3 and fixture 10 to be isolated between current source 3 and fixture 10
Air switch 8, one end binding post of the second air-isolation switch 8 are electrically connected with current source 3 by conducting wire, and the second air-isolation is opened
The other end binding post of pass 8 is electrically connected with fixture 10 by conducting wire, on the one hand can need active control circuit according to test
On the other hand break-make also can provide safety guarantee for circuit.
Fixture 10 is equipped with the rocker switch 9 that control fixture 10 connects voltage source 1 or current source 3,9 both sides of rocker switch
Terminals are electrically connected respectively with voltage source 1 and current source 3 by conducting wire, and the terminals among rocker switch 9 pass through with fixture 10
Conducting wire is electrically connected, and is conveniently adjusted fixture 10 and is connected with voltage source 1 or current source 3, and improves the operability of circuit.
The current-limiting resistance for limiting size of current between current source 3 and fixture 10 is equipped between current source 3 and fixture 10
11, one end binding post of current-limiting resistance 11 is electrically connected with current source 3 by conducting wire, other end binding post and the folder of current-limiting resistance 11
Tool 10 is electrically connected by conducting wire.Need to select the current-limiting resistance 11 of different resistance values to be series in circuit according to test, to limit
The size of electric current burns out testing resistance, while current-limiting resistance 11 can also play partial pressure to prevent electric current is excessive.
Fixture 10 is included for installing the fixed part 15 of testing resistance and for locking testing resistance movable part, moving part
Above fixed part 15, fixture 10 further includes the fixing piece 13 for connecting portion 15 and movable part, and fixing piece 13 is passed through and set
In movable part through-hole 18 and be threadedly coupled with the threaded hole 20 set on fixed part 15, through-hole 18 is aligned with threaded hole 20, fixed
Part 13 is equipped with the protrusion 17 along the circumferentially extending of fixing piece 13, and the diameter of protrusion 17 is more than the diameter of through-hole 18, and fixing piece 13 exists
Threadingly hole 20 is moved to fixed part 15 simultaneously for rotation in threaded hole 20, and movable part is pressed to fixed part by protrusion 17 while mobile
15, so as to be locked to testing resistance.
Fixed part 15 is equipped with the mounting hole 22 stretched into for testing resistance pin 16, height side of the mounting hole 22 along fixture 10
To extension, keep vertical after installation is complete convenient for testing resistance, the conducting end 21 powered to pin 16 is equipped in mounting hole 22, is drawn
Foot 16 contacts with conducting end 21 and keeps being electrically connected.Movable part is equipped with the lock hole 23 coordinated with mounting hole 22, testing resistance peace
Pin 16 sequentially passes through lock hole 23 and mounting hole 22 during dress, and the outer wall of lock hole 23 is towards one end of mounting hole 22 to far from peace
One end diameter in dress hole 22 gradually increases, and the diameter of outer wall towards one end of mounting hole 22 of lock hole 23 is less than mounting hole 22
Diameter after installation is complete, pushes movable part and testing resistance is locked, the outer wall of lock hole 23 is pressed into mounting hole 22
It is interior, since the outer wall of lock hole 23 is inclined taper, it can constantly be shunk during mounting hole 22 is pressed into, lead to lock hole
23 diameter constantly becomes smaller, and finally pasting merga pass frictional force with pin 16 is locked in pin 16 in mounting hole 22.
The utility model discloses a kind of thermistor selection test tooling in summary, be integrated with voltage source, current source and
The equipment such as multimeter, can simulate ammeter it is various in the case of operating current, thus pass to the electric current to test thermistor
Whether resistance value mutates, so as to judge whether the temperature-sensitive plays a protective role in actual power table.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any this practical relationship or sequence.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only will including those
Element, but also including other elements that are not explicitly listed or further include as this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
Also there are other identical elements in process, method, article or equipment including the element.
Above example is only to illustrate the technical solution of the utility model, rather than its limitations；Although with reference to aforementioned reality
Example is applied the utility model is described in detail, it will be understood by those of ordinary skill in the art that：It still can be to preceding
The technical solution recorded in each embodiment is stated to modify or carry out equivalent replacement to which part technical characteristic；And these
Modification is replaced, the spirit and model of various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (9)
1. a kind of thermistor selection test tooling, it is characterised in that：It is to be measured for clamping including tooling platform and set on tooling platform
The fixture of resistance, tooling platform are equipped with for the voltage source of the testing resistance power supply in fixture, fixture to be electrically connected with voltage source
It connects, tooling platform is equipped with for the current source of the testing resistance power supply in fixture, fixture to be electrically connected with current source, tooling platform
It is located at the multimeter of the testing resistance in fixture equipped with detection, fixture is electrically connected with multimeter.
2. thermistor selection test tooling as described in claim 1, it is characterised in that：It is equipped between the voltage source and fixture
For the first air-isolation of connecting and disconnecting of the circuit between voltage source and fixture to be controlled to switch, one end and the electricity of the first air-isolation switch
Potential source is electrically connected, and the other end of the first air-isolation switch is electrically connected with fixture.
3. thermistor selection test tooling as described in claim 1, it is characterised in that：It is equipped between the current source and fixture
For the second air-isolation of connecting and disconnecting of the circuit between current source and fixture to be controlled to switch, one end and the electricity of the second air-isolation switch
Stream source is electrically connected, and the other end of the second air-isolation switch is electrically connected with fixture.
4. thermistor selection test tooling as described in claim 1, it is characterised in that：The fixture is equipped with control fixture connection
The rocker switch of voltage source or current source, the terminals of rocker switch both sides are electrically connected with voltage source and current source, shake respectively
Terminals among arm switch are electrically connected with fixture.
5. thermistor selection test tooling as described in claim 1, it is characterised in that：It is equipped between the current source and fixture
For limiting the current-limiting resistance of size of current between current source and fixture, one end of current-limiting resistance is electrically connected with current source, current limliting
The other end of resistance is electrically connected with fixture.
6. thermistor selection test tooling as described in claim 1, it is characterised in that：The fixture includes to be measured for installing
The fixed part of resistance and for locking testing resistance movable part, moving part is above fixed part, movable part and fixed part activity
Connection.
7. thermistor selection test tooling as claimed in claim 6, it is characterised in that：The fixture further includes solid for connecting
Determine the fixing piece of portion and movable part, fixing piece passes through the through-hole set on movable part and connects with the threaded hole screw thread set on fixed part
It connects, fixing piece is equipped with the protrusion along the circumferentially extending of fixing piece, and raised diameter is more than the diameter of through-hole, raised by movable part pressure
To fixed part.
8. thermistor selection test tooling as claimed in claim 6, it is characterised in that：The fixed part is equipped with for electricity to be measured
The mounting hole that stretches into of resistance pin, movable part are equipped with the lock hole coordinated with mounting hole, and the outer wall of lock hole is towards the one of mounting hole
It holds to one end diameter far from mounting hole and gradually increases, the diameter of outer wall towards one end of mounting hole of lock hole is less than mounting hole
Diameter.
9. thermistor selection test tooling as claimed in claim 8, it is characterised in that：It is equipped with to pin and supplies in the mounting hole
The conducting end of electricity, pin are electrically connected with conducting end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721867981.5U CN207557352U (en) | 2017-12-27 | 2017-12-27 | A kind of thermistor selection test tooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721867981.5U CN207557352U (en) | 2017-12-27 | 2017-12-27 | A kind of thermistor selection test tooling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207557352U true CN207557352U (en) | 2018-06-29 |
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ID=62660711
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721867981.5U Active CN207557352U (en) | 2017-12-27 | 2017-12-27 | A kind of thermistor selection test tooling |
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| CN (1) | CN207557352U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113588130A (en) * | 2021-06-18 | 2021-11-02 | 格力电器（武汉）有限公司 | Thermistor monitoring method and device, electronic equipment and storage medium |
-
2017
- 2017-12-27 CN CN201721867981.5U patent/CN207557352U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113588130A (en) * | 2021-06-18 | 2021-11-02 | 格力电器（武汉）有限公司 | Thermistor monitoring method and device, electronic equipment and storage medium |
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