CN104614669A - Automatic tester of magnetic steel temperature limiter and test method thereof - Google Patents
Automatic tester of magnetic steel temperature limiter and test method thereof Download PDFInfo
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- CN104614669A CN104614669A CN201410786986.XA CN201410786986A CN104614669A CN 104614669 A CN104614669 A CN 104614669A CN 201410786986 A CN201410786986 A CN 201410786986A CN 104614669 A CN104614669 A CN 104614669A
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Abstract
The purpose of the invention is to provide an automatic tester of magnetic steel temperature limiter and a test method thereof, so as to meet the test requirements to the magnetic steel temperature limiter. The automatic tester of magnetic steel temperature limiter comprises a controller, a housing with a test cavity and a temperature sensor therein, and a thermal insulation cover for sealing the test cavity; the cavity wall of the test cavity consists of an internal heat conductive plate, a middle heating plate, and an external thermal insulation plate; the test cavity is provided with a test position; the thermal insulation cover is provided with a status switch with respect to the test position; the status switch can be triggered by actions of the magnetic steel temperature limiter in the corresponding test position; the controller is respectively connected with the temperature sensor, the status switch, and the heating plate; the controller receives signals of the status switch and the temperature sensor, and controls the work of the heating plate. The provided automatic tester of magnetic steel temperature limiter is simple in structure, free of manual intervention in the test process, thus increasing the precision, and reducing the manual cost.
Description
Technical field
The invention belongs to Electronic Testing Technology field, be related specifically to testing apparatus and the method for testing thereof of magnetic steel temperature limiter.
Background technology
Magnetic steel temperature limiter is also known as magnetic temperature limiter, it is the temperature switch losing magnetic conductivity at a certain temperature according to temperature sensitive ferrite and make, generally be made up of soft magnet (sensing magnet steel), rigid magnet (permanent magnet), take-off spring, lever and shift knob etc., the auto-breaking being mainly used in the household electrical appliance such as electric cooker, electric frying pan, gas rice cooker controls, its operating temperature can be selected arbitrarily between 50 DEG C ~ 295 DEG C, operation precision ± 0.1 ~ ± 3 DEG C.Can say, can the performance of magnetic steel temperature limiter be directly connected to electric cooker and normally work, and is therefore necessary to carry out Performance Detection to it, to ensure the reliability of product work.
The detection of current magnetic steel temperature limiter is normally put into this accessory the electric dry oven that oneself is in predetermined temperature and is detected, and its control procedure all needs artificial participation, and measuring accuracy is lower, can not meet the requirement of modern test far away.
Summary of the invention
The object of the invention is to propose a kind of magnetic steel temperature limiter auto testing instrument and method of testing thereof, to meet the test request to magnetic steel temperature limiter.
Magnetic steel temperature limiter auto testing instrument of the present invention comprises controller and inner is provided with test chamber, the housing of temperature sensor and the insulation cover for sealing test chamber, and the chamber wall of described test chamber is made up of the warming plate in the heat-conducting plate of inner side, middle heating board and outside; Described test chamber is provided with test station, and described insulation cover is provided with the status switch corresponding with test station position, described status switch can trigger by the action of the magnetic steel temperature limiter in corresponding test station; Described controller is connected with temperature sensor, status switch, heating board respectively, the signal of controller accepting state switch and temperature sensor, and the work controlling heating board.
The method of testing of above-mentioned magnetic steel temperature limiter auto testing instrument comprises the steps:
A: the warm temperature upper limit is set to controller, the described warm temperature upper limit is the ceiling temperature of magnetic steel temperature limiter;
B: magnetic steel temperature limiter is positioned in test station, switches on power, controller controls heating board and heats test chamber;
C: when status switch is by the action triggers of the magnetic steel temperature limiter in corresponding test station, status switch carries a status signal to controller, after controller receives described status signal, disconnects the power supply of heating board, and record temperature value now; Prescribe a time limit if the temperature in test chamber reaches on warm temperature, magnetic steel temperature limiter does not still have action, then controller disconnects the power supply of heating board.
Further, in described step B, when the temperature of test chamber is less than or equal to predetermined division temperature point, controller controls heating board and heats with rated power; When the temperature of test chamber is higher than described predetermined division temperature point, controller controls heating board with lower than specified power heating.So not only can heat test chamber as soon as possible, magnetic steel temperature limiter inner body can also be made to generate heat and generate heat synchronous with heating board, ensure that magnetic steel temperature limiter is fully heated, to reach the magnet steel temperature limit actuator temperature object consistent with test chamber temperature.
Further, in described step C, before status switch is triggered, controller shows the temperature of test chamber in real time; After status switch is triggered, the temperature of test chamber when controller keeps display status switch to be triggered, so that tester checks.
Further, described temperature sensor is thermopair, and two electrodes of described thermopair are connected to the symmetrical both sides of tested magnetic steel temperature limiter, to ensure that temperature survey is accurate.The signal exported due to thermopair is simulating signal, therefore needs to set up AD conversion and compensating module between thermopair and controller, by carrying out AD conversion after cold junction compensation, the simulating signal of thermopair being converted to digital signal, flowing to controller.
Further, described controller is made up of single-chip microcomputer and the display module be connected with single-chip microcomputer, load module, to facilitate input control parameter and to check temperature.
Magnetic steel temperature limiter auto testing instrument structure of the present invention is simple, without the need to manual intervention in test process, improves accuracy, and reduces cost of labor.
Accompanying drawing explanation
Fig. 1 is the structural representation (controller not shown in FIG. and temperature sensor) of magnetic steel temperature limiter auto testing instrument of the present invention.
Fig. 2 is the circuit theory diagrams of magnetic steel temperature limiter auto testing instrument of the present invention.
Accompanying drawing indicates: 1, controller; 11, single-chip microcomputer; 12, display module; 13, load module; 2, test chamber; 21, heat-conducting plate; 22, heating board; 23, warming plate; 3, temperature sensor; 4, housing; 5, insulation cover; 6, status switch; 7, magnetic steel temperature limiter; 8, AD conversion and compensating module.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the effect and principle of work etc. of the specific embodiment of the present invention as the mutual alignment between the shape of involved each component, structure, each several part and annexation, each several part are described in further detail.
Embodiment 1:
As shown in the figure, the magnetic steel temperature limiter auto testing instrument of the present embodiment comprises controller 1 and inside is provided with test chamber 2, the housing 4 of temperature sensor 3 and the insulation cover 5 for sealing test chamber 2, controller 1 is made up of single-chip microcomputer 11 and the display module 12 be connected with single-chip microcomputer 11, load module 13, and the chamber wall of described test chamber 2 is made up of the warming plate 23 in the heat-conducting plate 21 of inner side, middle heating board 22 and outside; Described test chamber 2 is provided with test station, and described insulation cover 5 is provided with the status switch 6 corresponding with test station position, described status switch 6 can trigger by the action of the magnetic steel temperature limiter 7 in corresponding test station; Described controller 1 is connected with temperature sensor 3, status switch 6, heating board 22 respectively, the signal of controller 1 accepting state switch 6 and temperature sensor 3, and controls the work of heating board 22.
The method of testing of above-mentioned magnetic steel temperature limiter 7 auto testing instrument comprises the steps:
A: utilize load module 13(keyboard or touch-screen etc.) to controller 1, the warm temperature upper limit is set, the described warm temperature upper limit is the ceiling temperature of magnetic steel temperature limiter 7;
B: magnetic steel temperature limiter 7 is positioned in test station, switches on power, controller 1 controls heating board 22 pairs of test chambers 2 and heats; When the temperature of test chamber 2 is less than or equal to predetermined division temperature point, controller 1 controls heating board 22 and heats with rated power; When the temperature of test chamber 2 is higher than described predetermined division temperature point, controller 1 controls heating board 22 with 50% of rated power heating.So not only can heat test chamber 2 as soon as possible, magnetic steel temperature limiter 7 can also be made fully to be heated, to reach the magnetic steel temperature limiter 7 temperature object consistent with test chamber 2 temperature.In the present embodiment, predetermined division temperature point is 60% of the warm temperature upper limit;
C: before status switch 6 is triggered, controller 1 utilizes display module 12 to show the temperature of test chamber 2 in real time; When status switch 6 is by the action triggers of the magnetic steel temperature limiter 7 in corresponding test station, status switch 6 carries a status signal to controller 1, after controller 1 receives described status signal, when keeping display status switch 6 to be triggered, the temperature of test chamber 2, disconnects the power supply of heating board 22 simultaneously; Prescribe a time limit if the temperature in test chamber 2 reaches on warm temperature, magnetic steel temperature limiter 7 does not still have action, then controller 1 disconnects the power supply of heating board 22.When tester is triggered by comparing status switch 6, the temperature of test chamber 2 and the warm temperature upper limit, can know that whether magnetic steel temperature limiter 7 is qualified.
In the present embodiment, temperature sensor 3 is thermopair, and two electrodes of described thermopair are connected to the symmetrical both sides of measured object magnetic steel temperature limiter 7, to ensure that temperature survey is accurate.The signal exported due to thermopair is simulating signal, therefore needs to set up AD conversion and compensating module 8 between thermopair and controller 1, by carrying out AD conversion after cold junction compensation, the simulating signal of thermopair being converted to digital signal, flowing to controller 1.
Claims (6)
1. a magnetic steel temperature limiter auto testing instrument, it is characterized in that comprising controller and be innerly provided with test chamber, the housing of temperature sensor and the insulation cover for sealing test chamber, the chamber wall of described test chamber is made up of the warming plate in the heat-conducting plate of inner side, middle heating board and outside; Described test chamber is provided with test station, and described insulation cover is provided with the status switch corresponding with test station position, described status switch can trigger by the action of the magnetic steel temperature limiter in corresponding test station; Described controller is connected with temperature sensor, status switch, heating board respectively, the signal of controller accepting state switch and temperature sensor, and the work controlling heating board.
2. magnetic steel temperature limiter auto testing instrument according to claim 1, is characterized in that described temperature sensor is thermopair, and two electrodes of described thermopair are connected to the symmetrical both sides of measured object magnetic steel temperature limiter.
3. magnetic steel temperature limiter auto testing instrument according to claim 1, is characterized in that described controller is made up of single-chip microcomputer and the display module be connected with single-chip microcomputer, load module.
4. the method for testing of magnetic steel temperature limiter auto testing instrument according to claim 1, is characterized in that comprising the steps:
A: the warm temperature upper limit is set to controller, the described warm temperature upper limit is the ceiling temperature of magnetic steel temperature limiter;
B: magnetic steel temperature limiter is positioned in test station, switches on power, controller controls heating board and heats test chamber;
C: when status switch is by the action triggers of the magnetic steel temperature limiter in corresponding test station, status switch carries a status signal to controller, after controller receives described status signal, disconnects the power supply of heating board, and record temperature value now; Prescribe a time limit if the temperature in test chamber reaches on warm temperature, magnetic steel temperature limiter does not still have action, then controller disconnects the power supply of heating board.
5. the method for testing of magnetic steel temperature limiter auto testing instrument according to claim 4, is characterized in that in described step B, and when the temperature of test chamber is less than or equal to predetermined division temperature point, controller controls heating board and heats with rated power; When the temperature of test chamber is higher than described predetermined division temperature point, controller controls heating board with lower than specified power heating.
6. according to the method for testing of the magnetic steel temperature limiter auto testing instrument of claim 4 or 5, it is characterized in that in described step C, before status switch is triggered, controller shows the temperature of test chamber in real time; After status switch is triggered, the temperature of test chamber when controller keeps display status switch to be triggered.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410786986.XA CN104614669A (en) | 2014-12-18 | 2014-12-18 | Automatic tester of magnetic steel temperature limiter and test method thereof |
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| CN201410786986.XA CN104614669A (en) | 2014-12-18 | 2014-12-18 | Automatic tester of magnetic steel temperature limiter and test method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880667A (en) * | 2015-05-22 | 2015-09-02 | 广东省茂名市质量计量监督检测所 | Mobile internet-based magnetic steel temperature limiter remote three-level monitor public detection system |
| CN110726932A (en) * | 2019-11-29 | 2020-01-24 | 福建福清核电有限公司 | Maintenance tool of Hall type reversing switch instrument |
| CN111474917A (en) * | 2020-04-16 | 2020-07-31 | 佛山市川东磁电股份有限公司 | Temperature limiter test board |
| CN112269366A (en) * | 2020-10-10 | 2021-01-26 | 格力电器（武汉）有限公司 | Temperature limiter life testing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110726932A (en) * | 2019-11-29 | 2020-01-24 | 福建福清核电有限公司 | Maintenance tool of Hall type reversing switch instrument |
| CN111474917A (en) * | 2020-04-16 | 2020-07-31 | 佛山市川东磁电股份有限公司 | Temperature limiter test board |
| CN112269366A (en) * | 2020-10-10 | 2021-01-26 | 格力电器（武汉）有限公司 | Temperature limiter life testing device |
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Application publication date: 20150513 |
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