CN107764435A - A kind of dynamic characteristic test method of temperature switch - Google Patents
A kind of dynamic characteristic test method of temperature switch Download PDFInfo
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- CN107764435A CN107764435A CN201710944577.1A CN201710944577A CN107764435A CN 107764435 A CN107764435 A CN 107764435A CN 201710944577 A CN201710944577 A CN 201710944577A CN 107764435 A CN107764435 A CN 107764435A
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- Prior art keywords
- temperature
- switch
- dynamic
- temperature switch
- dynamic characteristic
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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
Abstract
The present invention relates to a kind of dynamic characteristic test method of temperature switch.Because temperature switch only has make-and-break signal, without substantial temperature signal, conventional method can only detect its operating temperature, and be difficult to the actual dynamic characteristic for measuring it.And the present invention proposes that a kind of operating temperature switched by repeated detection at a temperature of Different Dynamic calculates the method for the dynamic characteristic of temperature switch, the operating temperature inputted under multiple different heating slopes, using the Integrated Algorithm of correlation, the time constant of the temperature switch is calculated.The present invention can disposably detect the dynamic characteristic of multiple different type temperature switches, reduce cost of labor, and test result is accurate, can be widely applied in the dynamic characteristic test of all kinds of temperature switches.
Description
Technical field
The present invention relates to the dynamic parametric test field of temperature sensor, and in particular to a kind of dynamic test of temperature switch
Method.
Background technology
Temperature switch essentially consists in domestic electric appliance motor and electric equipment, such as washed in daily life with quite varied
Clothing electromechanics machine, air conditioner fan motor, transformer, ballast, electric heating appliance etc., are also applied to various motors, electromagnetic oven, suction
Dirt machine, coil, transformer, electric heater, ballast, electric heating appliance, fluorescent lamp ballast, automobile motor, integrated circuit and general
The overheat excessively stream double protection of electrical equipment.But there was only nominal temperature on temperature switch, without its dynamic characteristic.By
There was only make-and-break signal in the signal of temperature switch, its dynamic characteristic can not be detected under general condition.
The content of the invention
For in place of above-mentioned the shortcomings of the prior art, the present invention provides a kind of dynamic testing method of temperature switch.
The invention largely improves this problem, can utilize the temperature switch operating temperature detected under different heating slopes
To calculate its time constant.Because being operated according to the detection program and software prompt finished writing, realize and detect multi way temperature simultaneously
Switch on-off, the direct return signal of switch of each different nominal temperatures can be directed to, will to the technical capability of operating personnel
Ask low, and the time constant degree of accuracy calculated is high.
The purpose of the present invention is achieved through the following technical solutions：A kind of dynamic testing method of temperature switch, the party
The system of method mainly includes real time acquisition control modules, single channel temperature collect module, computer, thermostatic oil bath（Case）, oil
Groove（Case）Controller, multi-path digital acquisition module.Oil groove first（Case）Controller is connected with computer by RS232, computer
By sending commands to oil groove（Case）Controller controls oil groove（Case）Temperature, make the temperature of oil groove that different heating slopes occur
Dynamic change, to create the environment of test temperature switching constant.
Further, described acquisition control module uses labview real time pattern compilers, makes it have height
Reliability and high real-time, reduce because of collection signal uncertain and caused by error.And can be with real time programs
The frequency acquisition of temperature switch signal is controlled by time delay module.
Further, the temperature of oil groove is dynamically controlled by oil groove controller, oil sump temperature is preheated first, then distinguishes
The heating slope of oil groove is set as 0.5 DEG C/min, 1 DEG C/min and 2 DEG C/min, and opened using acquisition module synchronous acquisition temperature
The make-and-break signal of pass and the temperature signal of oil groove.
Further, risen using recognizer integrated on computers according to 3 received from acquisition controller
The data signal of multiple temperature switches and the analog signal of oil sump temperature under warm slope, directly calculate corresponding temperature switch
Time constant.
The beneficial effects of the present invention are：The dynamic parameter of multiple temperature switches can be synchronously detected in testing, greatly
Improve operating efficiency greatly；According to the switch models of foundation, the Dynamic Recognition algorithm of compiling identifies temperature switch time constant
The degree of accuracy is very high, and can automatically correct the dynamic error of standard introducing.
Brief description of the drawings
Fig. 1 is the global overall system architecture figure of the present invention.
Fig. 2 is each module connection figure of the present invention.
Fig. 3 is the operational flow diagram of the present invention.
Fig. 4 is the signal acquisition module and oil groove of the present invention（Case）Connection figure.
In figure, acquisition control module 1, single channel temperature collect module 2, computer 3, thermostatic oil bath（Case）4th, oil groove（Case）Control
Molding block 5, multi-path digital acquisition module 6.
Embodiment
The present invention is described in more details below in conjunction with the accompanying drawings.
Fig. 1 illustrates overall system architecture of the present invention, a kind of temperature switch dynamic testing method, including:Acquisition control module
1st, single channel temperature collect module 2, computer 3, thermostatic oil bath（Case）4th, oil groove（Case）Control module 5, multi-path digital acquisition module
6。
Thermostatic oil bath（Case）It can be used according to the existing situation of user, for example using CJTH-300A, create different heatings
The environment of slope, the dynamic characteristic for test temperature switch.
Described multiple temperature switches can be decided in its sole discretion according to the needs of user test, and connected mode is：Multiple temperature
Degree switch is connected on multi-path digital acquisition module, and a temperature sensor is then connected to single channel temperature as standard adopts
Collect in module, temperature switch and temperature sensor are arranged together as far as possible, are placed into oil groove.
Described computer can be a PC for being mounted with labview, use the labview journeys voluntarily write
Sequence sends the i.e. controllable acquisition control module 1 of order and oil groove（Case）Controller 5.
Fig. 2 is the step precedence diagram of the dynamic characteristic of the calculating temperature switch of the present invention.After connecting material object first, start
Oil groove, temperature switch is put into oil groove, is sent and ordered using computer, be the change that different heating slopes occur for oil sump temperature
Change, multiple operating temperatures are input in Integrated Algorithm, calculate the time constant of each temperature switch.
Fig. 3 is the flow chart of the present invention.Specially 2 structures run parallel.The host computer of 2 lines is all computer.
Others are all independent of each other.One is computer to oil groove（Case）Controller is to oil groove, and one is divided into 2 subbranches in addition, and one
Bar subbranch is computer to real time controllers to single channel temperature collect module, and a subbranch arrives for computer in addition
Real time controllers are to multi-path digital acquisition module.
Fig. 4 is the precedence diagram of the calculating temperature switch dynamic characteristic of the present invention, is substantially a kind of defeated according to temperature switch
Go out the principle of the temperature sensor for break-make, under different heating slopes, test out its dynamic characteristic.
The test process of each module mainly includes the following steps that in said system：
1. tester, according to the good order of software translating, is connected to multichannel according to the temperature switch of required test dynamic parameter
Digital collection module 6, and a temperature sensor is connected to single channel temperature collect module 2, end temperature switch passes with temperature
Sensor is put into oil groove（Case）In 4；
2. opening test system, real time controllers are connected on computers, checks whether to be successfully connected, grasps success
Make controller；
3. open thermostatic oil bath（Case）, preheated, temperature in gutter, while reach temperature switch and temperature sensor temperature
To oil sump temperature, preheating time is preferably not less than 10 minutes；
4. starting 2 acquisition module controllers, start to gather temperature data and temperature switch data in groove, then in sequence
Heating slope in setting slot is respectively 0.5 DEG C/min, 1 DEG C/min and 2 DEG C/min, temperature in groove is occurred according to certain rule
Dynamic change, to measure the operating temperature of temperature switch in varied situations；
5. oil groove starts, with certain slope heating, to treat that temperature switch all acts, record result, the temperature of oil groove is cooled down to original
First preheating temperature；
6. coming back to step 3, different heating slopes is set；
After 7. the temperature switch under last 3 times different heating slopes all acts, " calculating dynamic parameter " in program is clicked on,
Can be by inputting the temperature switch operation curve under different heating slopes, the corresponding temperature for calling computer software integrated is opened
Dynamic characteristic recognizer is closed, realizes the automatic identification of multiple temperature switch dynamic characteristics.
Use case：We obtain the action of a temperature switch in 0.5 DEG C/min, 1 DEG C/min and 2 DEG C/min respectively
Temperature is 53.4413 DEG C, 55.0176 DEG C, 57.737 DEG C, and preheating temperature is 40.76 DEG C.The Dynamic Recognition compiled with us is calculated
Method, the time constant for obtaining the temperature switch are 190.8s.
Claims (7)
1. a kind of dynamic characteristic test method of temperature switch, it is characterised in that：System mainly includes real-time acquisition control module
（1）, temperature collect module（2）, computer（3）, thermostat（Case）（4）, thermostat（Case）Control module（5）, multi-path digital adopts
Collect certain block（6）；Activation system first, oil groove controller is sent a signal to by computer and preheats oil sump temperature, then setting oil
The heating slope of groove is respectively 0.5 DEG C/min, 1 DEG C/min and 2 DEG C/min；Real-time collection is sent commands to by computer simultaneously
Module so that the action signal and temperature signal of signal acquisition module collecting temperature switch；Treat 3 heating slopes all tested with
Afterwards, by the model of the temperature switch of foundation, with related dynamic parameters recognizer, you can the time for calculating switch is normal
Number.
A kind of 2. temperature switch dynamic characteristic test method according to claim 1, it is characterised in that：The preheating temperature of oil groove
Degree so can both avoid the long testing time, also give switch enough less than 15 DEG C or so of the nominal temperature of temperature switch
The sufficient response time.
A kind of 3. Dynamic Characteristics of Temperature Transducers method of testing according to claim 1, it is characterised in that：By compiling phase
The program of pass, single channel temperature collect module and multi-path digital acquisition module can be synchronised.
A kind of 4. temperature switch dynamic characteristic test method according to claim 1, it is characterised in that：Detection switch is moved
Making temperature will be respectively under 3 different heating slopes：0.5 DEG C/min, 1 DEG C/min and 2 DEG C/min.
A kind of 5. temperature switch dynamic testing method according to claim 1, it is characterised in that：The temperature switch of foundation
Temperature model is first order modeling, you can be fitted the operation curve of temperature switch well, can also greatly reduce calculating and open
Close the operand of time constant.
A kind of 6. temperature switch dynamic testing method according to claim 1, it is characterised in that:3 heating slopes of input
The operation curve and temperature curve of the temperature switch of lower collection, with the dynamic parameter algorithm of compiling, you can calculate each temperature
Spend the time constant of switch.
A kind of 7. temperature switch dynamic testing method according to claim 1, it is characterised in that:Using not in dynamic algorithm
Subtract each other two-by-two with the operating temperature under slope, carry out certain fortran, you can automatically correct due to temperature sensor
The dynamic error that time constant introduces, improve the degree of accuracy of dynamic characteristic test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710944577.1A CN107764435A (en) | 2017-10-12 | 2017-10-12 | A kind of dynamic characteristic test method of temperature switch |
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| CN201710944577.1A CN107764435A (en) | 2017-10-12 | 2017-10-12 | A kind of dynamic characteristic test method of temperature switch |
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| CN107764435A true CN107764435A (en) | 2018-03-06 |
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| CN201710944577.1A Pending CN107764435A (en) | 2017-10-12 | 2017-10-12 | A kind of dynamic characteristic test method of temperature switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411608A (en) * | 2019-07-23 | 2019-11-05 | 瑞纳智能设备股份有限公司 | A kind of modification method and system of list firewire switch temperature measurement error |
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