CN103575426A - Calibration method of water temperature sensor - Google Patents
Calibration method of water temperature sensor Download PDFInfo
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- CN103575426A CN103575426A CN201310553918.4A CN201310553918A CN103575426A CN 103575426 A CN103575426 A CN 103575426A CN 201310553918 A CN201310553918 A CN 201310553918A CN 103575426 A CN103575426 A CN 103575426A
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Abstract
The invention discloses a calibration method of a water temperature sensor. The calibration method of the water temperature sensor is characterized in that a thermocouple and the water temperature sensor are bound together and are then put into a constant-temperature box, and different temperatures of the constant-temperature box are set; the real-time temperatures of the thermocouple are measured by a temperature measurement module, and after the output voltage values of the water temperature sensor are collected by an upper computer through a simulator, a characteristic curve of the output voltage values of the water temperature sensor and the real-time temperatures is drawn through the upper computer. The method does not need to be carried out on a complete engine system or a whole vehicle, and therefore a large number of resources are saved. Equipment used in the method is relatively simple and easy to operate; the space of the constant-temperature box is relatively very small, and therefore energy consumption is relatively low when the temperatures are adjusted.
Description
Technical field
The present invention relates to cooling-water temperature sensor, particularly a kind of scaling method of cooling-water temperature sensor.
Background technology
In automobile engine control system, the water temperature value of the engine that need record by cooling-water temperature sensor is controlled system as a reference quantity, and this is because engine water temperature can have influence on emission behavior, fuel-economy performance, power performance and the cornering ability of automobile.So the degree of accuracy of water temperature is most important to the performance of whole engine.
Family curve (relation of temperature and output voltage) for sensor, the data that can provide by sensor production producer are known the temperature of cooling-water temperature sensor and the relation of corresponding resistance, and then in conjunction with actual hardware circuit situation, calculate output voltage numerical value corresponding to temperature according to these data.But the resistance value and this sensor resistance value in actual applications that due to sensor producer, provide do not meet, may just cause like this cooling-water temperature sensor family curve to have certain error, the accuracy of oil spout correction factor is affected, further cause under low temperature cold start fuel injector amount abnormal, cause difficulty in starting, the phenomenon such as discharge exceeds standard, fuel economy is poor, be short of power and driving is poor.So the work that cooling-water temperature sensor family curve is demarcated is essential.
It is by Bench calibration and vehicle-mounted demarcation, the magnitude of voltage calculating to be proofreaied and correct respectively on the basis of the magnitude of voltage calculating that traditional water temperature is demarcated.But due to existing equipment operating requirement, cause Bench calibration under normal temperature (25 ℃ of left and right), to carry out, so for demarcation task required under low temperature environment, can not demarcate on stand; Although secondly vehicle-mounted demarcation can be demarcated water temperature family curve under all operating modes, but because many reasons such as the uncontrollability of engine water temperature and the heat transfer lags of sensor own, make the temperature characteristics itself calibrating have larger deviation, particularly worst cold case, temperature rises too fast, and each temperature spot residence time is shorter.If a certain temperature spot is demarcated and is made mistakes in the process of demarcating, just need to shut down coolingly, and then again it to be demarcated, this will make the current work period elongated, and the while also will take ample resources for a long time.
For the problems referred to above, a kind of novel method is provided, can be more accurately, easily cooling-water temperature sensor is demarcated.
Summary of the invention
Technical matters to be solved by this invention is, a kind of scaling method of cooling-water temperature sensor is provided, can be more accurately, easily cooling-water temperature sensor is demarcated.
For achieving the above object, technical scheme of the present invention is that a kind of scaling method of cooling-water temperature sensor, is characterized in that: described scaling method is positioned in constant temperature oven after the grouping of thermopair and cooling-water temperature sensor is held together, and constant temperature oven is set different temperature; Temperature-measuring module is measured the real time temperature of thermopair, and host computer is drawn the output voltage values of cooling-water temperature sensor and the family curve of real time temperature gather the output voltage values of cooling-water temperature sensor by simulator after.
Described scaling method is set to the temperature setting of constant temperature oven-40 ℃ for the first time time.
The temperature that described scaling method shows at temperature-measuring module no longer changes, then can record Temperature numerical after waiting for a period of time.
A scaling method for cooling-water temperature sensor, owing to adopting above-mentioned method, the invention has the advantages that: 1, the present invention has higher reliability; 2, constant temperature oven controllable temperature scope far surpasses the required temperature range (40 ℃～140 ℃) of cooling-water temperature sensor, so can demarcate required all temperature spots to cooling-water temperature sensor in constant temperature oven, accurately controls; 3, relatively existing method, labour intensity is low; 4, the present invention need to not carry out on a complete engine system or car load, so saved a large amount of resources; 5, equipment used in the present invention is relatively simple, easy to operate, and the space of constant temperature oven is relatively very little, and thermoregulator time, power consumption is just relatively low.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation;
Fig. 1 is the structural representation of the scaling method of a kind of cooling-water temperature sensor of the present invention;
Fig. 2 is the process flow diagram of the scaling method of a kind of cooling-water temperature sensor of the present invention;
In Fig. 1,1, constant temperature oven; 2, cooling-water temperature sensor; 3, thermopair; 4, temperature-measuring module; 5, simulator; 6, host computer.
Embodiment
The method that the object of the invention is to demarcate by experiment, finds the output voltage U out of cooling-water temperature sensor 2 and the comparatively accurate family curve between real-time water temperature T.By this demarcation, broken away from the misleading of the imprecise data that sensor producer provides, have data comparatively accurately, for Auto Electronic Controlled System provides water temperature more accurately, improved the performance of low-temperature cool starting, thereby whole Auto Electronic Controlled System has all been had to optimization function to a certain degree.
The present invention is positioned in constant temperature oven 1 after 2 groupings of thermopair 3 and cooling-water temperature sensor are held together, and constant temperature oven 1 is set different temperature; Temperature-measuring module 4 is measured the real time temperature of thermopair 3, after the output voltage values of host computer 6 by simulator 5 collection cooling-water temperature sensors 2, draws the output voltage values of cooling-water temperature sensor 2 and the family curve of real time temperature.
This novel water temperature scaling method, mainly to utilize existing equipment and resource to demarcate cooling-water temperature sensor, in calibration process, cooling-water temperature sensor 2 is positioned in constant temperature oven 1, by the temperature control system of constant temperature oven 1, realize the accuracy controlling to cooling-water temperature sensor 2 environment temperatures of living in, thereby realize the Accurate Calibration of cooling-water temperature sensor 2 temperature characteristicss.This scaling method is demarcated with respect to stand or car load, has technically high reliability, ease for operation, application restric-tion condition few, has the features such as resource occupation is few, cost is low on cost.Because constant temperature oven 1 has the temperature control system of closed loop, can well control the residing environment temperature of cooling-water temperature sensor 2 and reach the required temperature spot of demarcation, so demarcating, this has just there is high reliability (can accurately control the residing environment temperature of sensor), constant temperature oven 1 controllable temperature scope far surpasses the required temperature range (40 ℃～140 ℃) of cooling-water temperature sensor, so can demarcate required all temperature spots to cooling-water temperature sensor 2 in constant temperature oven 1, accurately controls, this novel scaling method also can reduce a large amount of workloads, in traditional scaling method, uncontrollability due to temperature, be easy to cause the demarcation of a certain temperature spot inaccurate, if again this temperature spot is demarcated, must shut down and allow water temperature lower, this is a long time (the particularly demarcation of low temperature), and in the method for this novel demarcation, can pass through the Cryocooler Temperature Closed Loop Control System of constant temperature oven 1, allow the residing environment temperature of cooling-water temperature sensor 2 reach fast and treat testing temperature, can make like this each temperature spot can obtain fast, demarcate accurately, this novel scaling method need to not carry out on a complete engine system or car load, so saved a large amount of resources, the equipment that this novel scaling method is used is simultaneously relatively simple, easy to operate, and the space of constant temperature oven 1 is relatively very little, thermoregulator time, power consumption is just relatively low.
Specifically as shown in Figure 1-2, the present invention is tied together thermopair 3 and cooling-water temperature sensor 2 groupings, and is positioned in constant temperature oven 1, connects all devices; Grouping test water temperature sensor 2, by the signal wire exact connect ion of one group of cooling-water temperature sensor 2 wherein on the corresponding terminal of simulator 5; According to the temperature spot in test plan table, constant temperature oven 1 temperature is set, initial value is set to-40 degrees Celsius (from lowest temperature, starting the carrying out that test is conducive to whole test); When the temperature showing when constant temperature oven 1 and preset temperature value equate substantially, by temperature-measuring module 4, observe all thermopair 3 temperature again, when if thermopair 3 temperature that temperature-measuring module 4 shows are substantially indeclinable, (because the reason that heat is transmitted again waits for a period of time, can allow like this temperature of sensor itself can reach residing environment temperature), record this group thermopair 3 Temperature numerical; On host computer 6, move INCA software, by this software, read the wire of after the output voltage values of this group cooling-water temperature sensor, another being organized to cooling-water temperature sensor 2 and switch to terminal corresponding on simulator 5, record the voltage of these group cooling-water temperature sensor 2 correspondences and the temperature value of corresponding thermopair 3.Contrast the family curve that the output voltage He Qi producer of two groups of cooling-water temperature sensors 2 provides, whether the voltage signal that coarse analysis records at this temperature spot is correct, as excessive in difference, equipment checked and again to this temperature test.If upper temperature spot test is no problem, according to test plan table, next temperature spot to be measured is set.Completed after all temperature spot tests, the data of record are processed and (calculated thermopair 3 mean values of every group of cooling-water temperature sensor 2 correspondences, and go out the actual required temperature spot numerical value of CUR table by the temperature spot numerical evaluation recording), voltage value corresponding to the temperature spot calculating write into CUR table corresponding in software, and the environment temperature of constant temperature oven 1 is set according to the temperature spot in inspection plan table, according to the method in testing procedure, confirm the residing environment temperature A of cooling-water temperature sensor 2, by INCA software, read the temperature B drawing by tabling look-up simultaneously, seeing tables look-up show whether the environment temperature A of temperature value B and current reality meets, if do not met, analyze reason and again this temperature spot tested, check.After having completed above-mentioned test and check, final data are processed, confirmed.
By reference to the accompanying drawings the present invention is exemplarily described above; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as the various improvement that adopted technical solution of the present invention to carry out, or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (3)
1. a scaling method for cooling-water temperature sensor, is characterized in that: described scaling method is positioned in constant temperature oven (1) after thermopair (3) and cooling-water temperature sensor (2) grouping are held together, and constant temperature oven (1) is set different temperature; Temperature-measuring module (4) is measured the real time temperature of thermopair (3), after the output voltage values of host computer (6) by simulator (5) collection cooling-water temperature sensor (2), draws the output voltage values of cooling-water temperature sensor and the family curve of real time temperature.
2. the scaling method of a kind of cooling-water temperature sensor according to claim 1, is characterized in that: described scaling method is set to the temperature setting of constant temperature oven-40 ℃ for the first time time.
3. the scaling method of a kind of cooling-water temperature sensor according to claim 1, is characterized in that: the temperature that described scaling method shows at temperature-measuring module (4) no longer changes, then can record Temperature numerical after waiting for a period of time.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105371993A (en) * | 2015-12-25 | 2016-03-02 | 鼎奇(天津)主轴科技有限公司 | Temperature sensor calibration method based on twice application of polynomial fitting |
| CN109984620A (en) * | 2018-12-06 | 2019-07-09 | 浙江苏泊尔家电制造有限公司 | The heating means and cooking apparatus of cooking apparatus |
| CN110530544A (en) * | 2019-07-23 | 2019-12-03 | 青岛捷能易道能效科技有限公司 | A kind of temperature correction method and system |
| CN112611482A (en) * | 2020-11-24 | 2021-04-06 | 甄十信息科技（上海）有限公司 | Method for calibrating temperature sensor of intelligent equipment |
| CN113188685A (en) * | 2021-04-22 | 2021-07-30 | 安徽江淮汽车集团股份有限公司 | System and method for correcting water temperature meter of vehicle |
| CN113204860A (en) * | 2021-03-17 | 2021-08-03 | 联合汽车电子有限公司 | Calibration method |
| CN113567010A (en) * | 2021-08-17 | 2021-10-29 | 安徽江淮汽车集团股份有限公司 | Engine temperature sensor test system and test method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105371993A (en) * | 2015-12-25 | 2016-03-02 | 鼎奇(天津)主轴科技有限公司 | Temperature sensor calibration method based on twice application of polynomial fitting |
| CN109984620A (en) * | 2018-12-06 | 2019-07-09 | 浙江苏泊尔家电制造有限公司 | The heating means and cooking apparatus of cooking apparatus |
| CN110530544A (en) * | 2019-07-23 | 2019-12-03 | 青岛捷能易道能效科技有限公司 | A kind of temperature correction method and system |
| CN112611482A (en) * | 2020-11-24 | 2021-04-06 | 甄十信息科技（上海）有限公司 | Method for calibrating temperature sensor of intelligent equipment |
| CN113204860A (en) * | 2021-03-17 | 2021-08-03 | 联合汽车电子有限公司 | Calibration method |
| CN113188685A (en) * | 2021-04-22 | 2021-07-30 | 安徽江淮汽车集团股份有限公司 | System and method for correcting water temperature meter of vehicle |
| CN113567010A (en) * | 2021-08-17 | 2021-10-29 | 安徽江淮汽车集团股份有限公司 | Engine temperature sensor test system and test method |
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Application publication date: 20140212 |