CN110925804B - Method for accurately measuring temperature of food in cooker on gas stove - Google Patents
Method for accurately measuring temperature of food in cooker on gas stove Download PDFInfo
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- CN110925804B CN110925804B CN201811092545.4A CN201811092545A CN110925804B CN 110925804 B CN110925804 B CN 110925804B CN 201811092545 A CN201811092545 A CN 201811092545A CN 110925804 B CN110925804 B CN 110925804B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/12—Arrangement or mounting of control or safety devices
- F24C3/126—Arrangement or mounting of control or safety devices on ranges
Abstract
The invention relates to a method for accurately measuring the temperature of food in a cooker on a gas stove, which is characterized by comprising the following steps: an infrared temperature measurement module is arranged on the wall surface behind the cooker or on the range hood above the cooker, the infrared temperature measurement module comprises a distance sensor and an infrared temperature measurement sensor which are arranged in a rotating way, and a controller which is electrically connected with the distance sensor and the infrared temperature measurement sensor, and a prestored data table when no cooker is placed on the cooker is prestored in the controller; when a pot is placed on a burner of the cooker, after the burner is ignited, the controller finds any three points of the upper end edge of the pot, and determines the diameter, the height and the position of a central point of the pot through any three points of the upper end edge of the pot; then, the infrared temperature measuring sensor is rotated to obtain the temperatures of food at different points in the cooker according to a preset circuit. Compared with the prior art, the invention has the advantages of low cost, no need of changing the structure of the burner and capability of accurately measuring the temperature of food in the cooker on the gas stove.
Description
Technical Field
The invention relates to a method for accurately measuring the temperature of food in a cooker on a gas stove.
Background
Along with the higher and higher requirements of users on cooking experience, intelligent control and cooking safety, how to accurately measure the temperature of food in a cooker, further realize preventing the food from being burnt dry, and the intelligent reminding function of realizing the intelligent menu is an important research direction at present.
The existing gas stove pot food temperature measuring method mainly comprises the following steps: NTC temperature measurement of the pan bottom, infrared temperature measurement of the pan bottom, probe type temperature measurement and the like.
The NTC temperature measurement of the pan bottom needs to change the structure of a burner and needs to form an inner ring opening, which easily causes the uneven temperature of the pan bottom; the interference of the inner ring high-temperature flue gas and the flame can also influence the temperature measurement precision; moreover, the pot has poor adaptability, and if the pot is internally concave at the bottom, the ceramic pot can influence the temperature measurement precision; the infrared temperature measurement of the pot bottom still needs to be contacted with the pot bottom, the structure of the combustor also needs to be changed, an inner ring of the combustor needs to be provided with holes, and the lens is easily affected by oil stains.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for accurately measuring the temperature of food in a cooker on a gas stove with low cost and without changing the structure of a burner in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for accurately measuring the temperature of food in a cooker on a gas stove is characterized in that: an infrared temperature measuring module is arranged on the wall surface behind the kitchen range or on the range hood above the kitchen range, the infrared temperature measuring module comprises a distance sensor and an infrared temperature measuring sensor which are arranged in a rotating way, and a controller which is electrically connected with the distance sensor and the infrared temperature measuring sensor,
the controller is internally pre-stored with a pre-stored data table, and the pre-stored data table comprises the following contents: when no cookware is placed on the cooker, the distance sensor is rotated to record the distances between different points on the cooker panel and the distance sensor, the rotating angle corresponding to the distance sensor, the rotating angle of the distance sensor when the distance sensor is aligned with the central point of the burner, and the direct distance between the central point of the burner and the distance sensor, which is acquired by the distance sensor;
when the pan was placed on the combustor of cooking utensils, after the combustor was igniteed, the pan judgement procedure was opened to the controller, and the pan judgement procedure's concrete mode is:
rotating the distance sensor, measuring the real-time distance actually measured by the distance sensor through the actual rotating angle of the distance sensor, comparing the real-time distance with a prestored data table stored in a controller, finding any three points of the upper edge of the cookware, and determining the diameter, the height and the position of a central point of the cookware through any three points of the upper edge of the cookware; then, rotating the distance sensor to enable the distance sensor to be over against the position of a central point of the cookware, and obtaining the vertical height of the central point of food in the cookware;
then, the infrared temperature measuring sensor is rotated to obtain the temperatures of food at different points in the cooker according to a preset circuit.
As the improvement, infrared temperature sensor according to predetermined circuit, acquires the temperature of the inside different point food of pan and includes: the temperature of food at different points on the circumference of a concentric circle with the interval of 8-12 mm is obtained by taking the center point of the food in the cooker as the center of a circle.
And improving, namely acquiring the temperature distribution condition, the average temperature and the highest temperature value of food in the cookware according to the temperatures of food at different points in the cookware measured by the infrared temperature measuring sensor.
And improving again, when the central point position of the obtained pan is inconsistent with the central point position of the burner in the pre-stored data table, judging that the pan is placed partially, and reminding a user to put the pan correctly.
And then improving, rotating the distance sensor, enabling the distance sensor to just face to the central point position of the cooker, acquiring the real-time distance acquired by the distance sensor at the moment, measuring the vertical height of an actual measurement point by utilizing the real-time distance, judging that the cooker cover exists at the moment if the vertical height is greater than the height of the cooker, and judging that the cooker cover does not exist at the moment if the vertical height is less than the height of the cooker.
And the controller calculates the vertical height of a food central point in the cooker and calculates the diameter and height of the cooker by using the real-time distance acquired by the distance sensor and the rotating angles of the distance sensor in the X direction and the Y direction.
Compared with the prior art, the invention has the advantages that: utilize distance sensor to confirm the diameter of pan, central point puts, liquid level height, utilize infrared sensor to obtain the temperature data of the inside food of pan, and is with low costs, the combustor need not trompil, the interference of near combustor high temperature flue gas has been avoided, simultaneously an infrared temperature measurement module, can also measure the food temperature in two different pans simultaneously, and can be to the unknown condition of pan food liquid level height, use distance sensor automatic judgement pan position, the size, the data of liquid level height, the temperature data who records is accurate, can be as judging whether the pan burns futilely, intelligent menu is reminded and is provided the foundation.
Drawings
Fig. 1 is a schematic view of a range hood and a cooker in an embodiment of the invention.
Fig. 2 is a schematic diagram of an infrared temperature measurement module according to an embodiment of the present invention.
Fig. 3 is a schematic view of a cooker panel when any three points of the upper edge of the cooker are found in the embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The invention provides a method for accurately measuring the temperature of food in a pot on a gas stove, wherein an infrared temperature measuring module 2 is arranged on the rear wall surface of the stove 1 or a range hood 9 above the stove, and the method is shown in figure 1. This infrared temperature measurement module 2 includes the hollow shell that epitheca 21 and printing opacity inferior valve 22 are constituteed, set up distance sensor 3 and infrared temperature measurement sensor 4 in the hollow shell, the support 5 that is used for fixed distance sensor 3 and infrared temperature measurement sensor 4 of setting in the hollow shell, the drive support that is connected with support 5 moves along the first step motor 6 of X axle direction removal and the second step motor 7 that drives the support and move along the Y axle direction, and controller 8 with distance sensor 3 and the electric connection of infrared temperature measurement sensor 4, see fig. 2 and show. The controller 8 can be integrated in a control circuit board of the cooker and can also be integrated in a control circuit board of the range hood. The distance sensor 3 is a laser radar distance sensor.
The controller is internally pre-stored with a pre-stored data table, and the pre-stored data table comprises the following contents: when no cookware is placed on the cooker, the distance sensor is rotated to record the distances between different points on the cooker panel and the distance sensor, the rotating angle corresponding to the distance sensor, the rotating angle of the distance sensor when the distance sensor is aligned with the central point of the burner, and the direct distance between the central point of the burner and the distance sensor, which is acquired by the distance sensor;
when the pan was placed on the combustor of cooking utensils, after the combustor was igniteed, the pan judgement procedure was opened to the controller, and the pan judgement procedure's concrete mode is:
rotating the distance sensor, measuring the real-time distance actually measured by the distance sensor through the actual rotating angle of the distance sensor, comparing the real-time distance with a prestored data table stored in a controller, finding any three points of the upper edge of the cookware, and determining the diameter, the height and the position of a central point of the cookware through any three points of the upper edge of the cookware; then, rotating the distance sensor to enable the distance sensor to be over against the position of a central point of the cookware, and obtaining the vertical height of the central point of food in the cookware;
then, rotate infrared temperature sensor, make infrared temperature sensor according to predetermined circuit, acquire the temperature of the inside different some food of pan, it is specific, infrared temperature sensor according to predetermined circuit, the temperature of the inside different some food of pan that acquires includes: the temperature of food at different points on the concentric circle circumference of 8mm ~ 12mm interval is obtained as the centre of a circle from food central point in the pan, then according to the temperature of the inside different point food of pan that infrared temperature sensor surveyed, obtains the temperature distribution condition, average temperature of food in the pan to and the temperature maximum.
When the central point position of the pan that obtains and combustor central point position inconsistent in prestoring the data table, judge that the pan is put partially, remind the user to put the pan upright.
Rotating the distance sensor, making the distance sensor just to the central point position of pan, obtaining the real-time distance that distance sensor gathered this moment, utilizing this real-time distance to survey the vertical height of actual measurement point, if this vertical height is greater than the height of pan, then judging this moment has the pot cover, if this vertical height is less than the height of pan, then judges no pot cover this moment.
The method for finding any three points of the upper edge of the cookware by using the data acquired by the distance sensor comprises the following steps:
can rotate along X, Y axes driven by the motor, if the rotation angles alpha and beta are respectively rotated along the X axis and the Y axis, the distance l from the sensor to the edge point of the upper end of the pot can be obtained0Taking the initial position of the sensor as the origin (0,0,0), the position of the pot edge point can be determined as (l)0·cosβ·sinα，l0·sinβ，l0Cos β cos α). Passing distance sensorThe diameter and the position of the central point of the pot can be determined by finding any three points on the edge of the upper end of the pot, and further, whether the pot covers the pot cover or not and the liquid level of food in the pot can be judged.
Specifically, when the infrared temperature measurement module is at the initial position, the controller is internally provided with data of the initial state of the cooker, namely the state when no cooker is available, and a point a0(l0, α 0, β 0) at the center of the cooker panel corresponds to three-dimensional coordinates (x0, y0, z0), which is shown in fig. 3; when a user places a pot, after ignition, a pot judging program is started, the bracket 5 is driven by the first stepping motor and the second stepping motor, a point aligned with the distance sensor is moved to A2(x2, y2 and z2) along the x axis forward direction by A0, and as the point is an edge point of the pot, the original coordinate is suddenly changed to A2(x2, y2 and z2) from A0(x1, y1 and z1), and the point is judged to be a point of the edge of the pot. Similarly, the alignment direction of the distance sensor can be along the directions of B0 → B2, C0 → C2, the coordinates of the other two points B2 and C2 of the edge of the pot can be determined, the diameter of the pot can be determined through the coordinates of the three points A2, B2 and C2, furthermore, the horizontal position (xp, yp, zp) of the center point P2 of the pot is calculated, the angle of the temperature measurement module is adjusted to enable the distance sensor to be compared with the position of P2, the height zc at the moment is measured, and if zc > zp, the pot cover is judged to be present at the moment; if zc is less than zp, it is determined that there is no pan cover, and zc is the height of the food in the pan.
After the distance sensor obtains the data, the infrared sensor can move along a predefined route to obtain the temperature of each point on the route, including the temperature of the edge, the central line, the water level, the panel and the like of the pot, and further processing is carried out by a program, such as calculating the average temperature, the temperature distribution, the highest temperature and the like of food in the pot, and finally the average temperature, the temperature distribution, the highest temperature and the like are transmitted to a cooker control system by a Bluetooth module to adjust the firepower, so that the functions of dry burning prevention, intelligent menu and the like are realized.
Claims (7)
1. A method for accurately measuring the temperature of food in a cooker on a gas stove is characterized in that: an infrared temperature measuring module is arranged on the wall surface behind the kitchen range or on the range hood above the kitchen range, the infrared temperature measuring module comprises a distance sensor and an infrared temperature measuring sensor which are arranged in a rotating way, and a controller which is electrically connected with the distance sensor and the infrared temperature measuring sensor,
the controller is internally pre-stored with a pre-stored data table, and the pre-stored data table comprises the following contents: when no cookware is placed on the cooker, the distance sensor is rotated to record the distances between different points on the cooker panel and the distance sensor, the rotating angle corresponding to the distance sensor, the rotating angle of the distance sensor when the distance sensor is aligned with the central point of the burner, and the direct distance between the central point of the burner and the distance sensor, which is acquired by the distance sensor;
when the pan was placed on the combustor of cooking utensils, after the combustor was igniteed, the pan judgement procedure was opened to the controller, and the pan judgement procedure's concrete mode is:
rotating the distance sensor, measuring the real-time distance actually measured by the distance sensor through the actual rotating angle of the distance sensor, comparing the real-time distance with a prestored data table stored in a controller, finding any three points of the upper edge of the cookware, and determining the diameter, the height and the position of a central point of the cookware through any three points of the upper edge of the cookware; then, rotating the distance sensor to enable the distance sensor to be over against the position of a central point of the cookware, and obtaining the vertical height of the central point of food in the cookware;
then, the infrared temperature measuring sensor is rotated to obtain the temperatures of food at different points in the cooker according to a preset circuit.
2. The method for accurately measuring the temperature of food in a pot on a gas stove according to claim 1, wherein the method comprises the following steps: infrared temperature sensor according to predetermined circuit, acquires the temperature of the inside different point food of pan and includes: the temperature of food at different points on the circumference of a concentric circle with the interval of 8-12 mm is obtained by taking the center point of the food in the cooker as the center of a circle.
3. The method for accurately measuring the temperature of food in a pot on a gas stove according to claim 1 or 2, characterized in that: according to the temperature of the food at different points in the cookware measured by the infrared temperature measuring sensor, the temperature distribution condition, the average temperature and the highest temperature value of the food in the cookware are obtained.
4. The method for accurately measuring the temperature of food in a pot on a gas stove according to claim 1, wherein the method comprises the following steps: when the central point position of the pan that obtains and combustor central point position inconsistent in prestoring the data table, judge that the pan is put partially, remind the user to put the pan upright.
5. The method for accurately measuring the temperature of food in a pot on a gas stove according to claim 1, wherein the method comprises the following steps: rotating the distance sensor, making the distance sensor just to the central point position of pan, obtaining the real-time distance that distance sensor gathered this moment, utilizing this real-time distance to survey the vertical height of actual measurement point, if this vertical height is greater than the height of pan, then judging this moment has the pot cover, if this vertical height is less than the height of pan, then judges no pot cover this moment.
6. The method for accurately measuring the temperature of food in a pot on a gas stove according to claim 1, wherein the method comprises the following steps: the distance sensor and the infrared temperature measurement sensor can rotate along two mutually perpendicular directions on the horizontal plane at least, and the distance sensor and the infrared temperature measurement sensor are arranged to be in an X direction and a Y direction along the two mutually perpendicular directions of rotation on the horizontal plane of the current installation position, and the controller calculates the vertical height of a food central point in the pot by utilizing the real-time distance collected by the distance sensor and the rotation angle of the distance sensor in the X direction and the Y direction, and calculates the diameter and the height of the pot.
7. The method for accurately measuring the temperature of food in a pot on a gas stove according to claim 6, wherein the method comprises the following steps: the infrared temperature measurement module comprises a hollow shell consisting of an upper shell and a light-transmitting lower shell, a support which is arranged in the hollow shell and used for fixing a distance sensor and the infrared temperature measurement sensor, a first stepping motor which is connected with the support and drives the support to move along the X-axis direction, and a second stepping motor which drives the support to move along the Y-axis direction.
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| CN111493845B (en) * | 2020-05-20 | 2024-01-16 | 上海掌门科技有限公司 | Pulse acquisition device |
| CN112344386B (en) * | 2020-09-25 | 2023-10-13 | 深圳Tcl新技术有限公司 | Thermal power adjustment method, apparatus, and storage medium |
| CN112628803A (en) * | 2021-01-27 | 2021-04-09 | 夏鑫磊 | Intelligent constant-temperature Internet of things stove |
| CN114271699A (en) * | 2021-12-30 | 2022-04-05 | 广东美的厨房电器制造有限公司 | Cooking appliance and temperature measuring method |
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| ATE432446T1 (en) * | 2006-11-02 | 2009-06-15 | Electrolux Home Prod Corp | DEVICE AND METHOD FOR DETERMINING THE TEMPERATURE INSIDE A COOKED FOOD |
| CN102393036A (en) * | 2011-09-24 | 2012-03-28 | 广东工业大学 | Mounting structure for range hood with sensor |
| JP5921282B2 (en) * | 2012-03-28 | 2016-05-24 | 大阪瓦斯株式会社 | Infrared temperature measuring device |
| CN104266233A (en) * | 2014-04-26 | 2015-01-07 | 彭萍芳 | Infrared intelligent telemetering temperature control system |
| JP6647025B2 (en) * | 2015-12-01 | 2020-02-14 | リンナイ株式会社 | Temperature detector |
| CN206398777U (en) * | 2016-12-26 | 2017-08-11 | 泰州非尔电子科技有限公司 | A kind of infrared measurement of temperature integrated security stove |
| CN207035238U (en) * | 2017-08-14 | 2018-02-23 | 宁波方太厨具有限公司 | A kind of intelligent stove |
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