CN111983557A - Peculiar smell source detecting system and kitchen peculiar smell source detecting and discharging system - Google Patents
Peculiar smell source detecting system and kitchen peculiar smell source detecting and discharging system Download PDFInfo
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- 238000007599 discharging Methods 0.000 title claims description 6
- 238000001514 detection method Methods 0.000 claims abstract description 83
- 230000000712 assembly Effects 0.000 claims abstract description 45
- 238000000429 assembly Methods 0.000 claims abstract description 45
- 239000002184 metal Substances 0.000 claims abstract description 45
- 239000004065 semiconductor Substances 0.000 claims abstract description 45
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 2
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- QGJOPFRUJISHPQ-NJFSPNSNSA-N carbon disulfide-14c Chemical compound S=[14C]=S QGJOPFRUJISHPQ-NJFSPNSNSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 230000008786 sensory perception of smell Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/0009—Transmission of position information to remote stations
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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
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
Abstract
The invention relates to a peculiar smell source detection system and a kitchen peculiar smell source detection and discharge system, wherein the peculiar smell source detection system is characterized in that: the system comprises eight wireless sensor assemblies distributed at different positions in a measured space and a controller connected with the eight wireless sensor assemblies; the eight wireless sensor assemblies are respectively positioned at eight vertexes of a cuboid or a cube in a space to be detected, and after the eight wireless sensor assemblies are installed, detection values of the corresponding metal semiconductor oxide sensors need to be calibrated in advance; the controller is internally pre-stored with the spatial position coordinates of the eight wireless sensor assemblies in the space to be measured, and can calculate the spatial position coordinates of the peculiar smell source in the space to be measured according to the eight concentration data and the spatial position coordinates of the eight wireless sensor assemblies in the space to be measured. Compared with the prior art, the method can timely and accurately detect the position of the peculiar smell source in the space.
Description
Technical Field
The invention relates to a peculiar smell source detection system and a kitchen peculiar smell source detection and discharge system.
Background
In recent years, with the increasing industrialization degree of China, the economy is rapidly developed, but the air problem generated by the economy is gradually highlighted. The source of the peculiar smell gas in the air is many, and the kinds of the peculiar smell gas are also many, and among the peculiar smell gas, ammonia gas, carbon disulfide, hydrogen sulfide, methyl mercaptan and trimethylamine which have great harm to human health are mainly used. Because the air peculiar smell components are extremely complex and unstable in properties, the determination of the peculiar smell at present has certain difficulty, and the detailed position of the peculiar smell is often not judged through the subjective olfaction sense air peculiar smell source of people, so that the defect of inaccurate detection exists.
Meanwhile, some gases have certain harm to human bodies, and if the odor source is identified through the smell of the human bodies, the gases are obviously not suitable. In addition, when the peculiar smell source exists in the kitchen, if the user goes on a business trip or does not go to the kitchen for a long time, the peculiar smell source cannot be found timely.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a detection system capable of timely and accurately detecting the position of the odor source in the space, aiming at the above prior art.
The second technical problem to be solved by the present invention is to provide a detection and discharge system capable of accurately detecting the position of the kitchen odor source and performing odor discharge, aiming at the above prior art.
The technical scheme adopted by the invention for solving the first technical problem is as follows: a peculiar smell source detecting system is characterized in that: the device comprises eight wireless sensor assemblies distributed at different positions in a space to be measured and a controller connected with the eight wireless sensor assemblies; the eight wireless sensor assemblies are respectively positioned at eight vertexes of a cuboid or a cube in a space to be detected, each wireless sensor assembly comprises a metal semiconductor oxide sensor, and the eight metal semiconductor oxide sensors are connected with the controller and respectively transmit concentration data detected by the eight metal semiconductor oxide sensors to the controller; after the eight wireless sensor assemblies are installed, the detection values of the corresponding metal semiconductor oxide sensors need to be calibrated in advance; the controller is internally pre-stored with the spatial position coordinates of the eight wireless sensor assemblies in the space to be measured, and after receiving the concentration data detected by the eight metal semiconductor oxide sensors, the controller calculates the spatial position coordinates of the odor source in the space to be measured according to the eight concentration data and the spatial position coordinates of the eight wireless sensor assemblies in the space to be measured.
As an improvement, the controller calculates the spatial position coordinates of the odor source in the to-be-measured space according to the following modes:
selecting a wireless sensor component corresponding to a metal semiconductor oxide sensor with the highest value in eight concentration data as a reference point, marking the reference point as a point A, marking positions corresponding to the other three wireless sensor components in the counterclockwise direction of a top plane as a point B, a point G and a point C respectively, marking the position corresponding to the wireless sensor component opposite to the point A on a bottom plane as a point D, and marking the positions corresponding to the other three wireless sensor components in the counterclockwise direction of the bottom plane as a point E, a point H and a point F respectively; then, a three-dimensional coordinate system is established by taking the point A as a coordinate origin, the AC direction is the X-axis direction of the three-dimensional coordinate system, the AD direction is the Y-axis direction of the three-dimensional coordinate system, and the AB direction is the Z-axis direction of the three-dimensional coordinate system;
secondly, taking the point projected by the peculiar smell source P on the side plane formed by the ACFD as X, and calculating the position of the X point:
xX＝xA+u1cosαAC+v1sinαAC
yX＝yA+u1sinαAC+v1cosαAC
wherein x isXIs the X-axis coordinate of the X point in the side plane formed by the ACFD, yXY-axis coordinates of the X point in the side plane formed by the ACFD; x is the number ofAIs the X-axis coordinate of point A, yAIs at point AY-axis coordinates; x is the number ofCIs the X-axis coordinate of point C, yCY-axis coordinates of point C; u. of1、v1、cosαACAnd sin alphaACAre respectively obtained by the following formulas:
a1 is the distance from the point X to the point A, b1 is the distance from the point X to the point C, and since the detection values of the metal semiconductor oxide sensors at the corresponding positions are calibrated in advance after the eight wireless sensor assemblies are installed, the distance from the point X to the point A and the distance from the point X to the point C can be obtained through conversion by using the detection data of the metal semiconductor oxide sensors at the point A and the point C; dACIs the distance from point A to point C;
and thirdly, taking the point projected by the odor source P on the side plane formed by the ABED as Y, and calculating the position of the Y point:
xY＝xA+u2cosαAD-v2sinαAD
yY＝yA+u2sinαAD+v2cosαAD
wherein x isYIs the X-axis coordinate of the Y point on the side plane formed by the ABED, YYIs the Y-axis coordinate of the Y point on the side plane formed by the ABED; x is the number ofAIs the X-axis coordinate of point A, yAIs the Y-axis coordinate of the point A; x is the number ofDIs the X-axis coordinate of the point C,yDy-axis coordinates of point C; u. of2、v2、cosαADAnd sin alphaADAre respectively obtained by the following formulas:
a2 is the distance from the Y point to the A point, b2 is the distance from the Y point to the D point, and since the detection values of the metal semiconductor oxide sensors at the corresponding positions are calibrated in advance after the eight wireless sensor assemblies are installed, the distance a2 from the Y point to the A point and the distance b2 from the Y point to the D point can be obtained through conversion by using the detection data of the metal semiconductor oxide sensors at the A point and the D point; dADThe distance from the point A to the point D is shown;
step four, the point projected by the odor source P on the top plane formed by the ABGC is Z, and the position of the Z point is calculated:
xZ＝xA+u3cosαAB+v3sinαAB
yZ＝yA+u3sinαAB+v3cosαAB
wherein x isZIs the X-axis coordinate, y, of the Z point on the top plane formed by the ABGCZIs the Y-axis coordinate of the Z point on the top plane formed by the ABGC; x is the number ofAIs the X-axis coordinate of point A, yAIs the Y-axis coordinate of the point A; x is the number ofBIs the X-axis coordinate of point B, yBY-axis coordinate of B point；u3、v3、cosαABAnd sin alphaABAre respectively obtained by the following formulas:
a3 is the distance from the Z point to the A point, B2 is the distance from the Z point to the B point; since the detection values of the metal semiconductor oxide sensors at the corresponding positions are calibrated in advance after the eight wireless sensor assemblies are installed, by using the detection data of the metal semiconductor oxide sensors at the points A and B,
the distance a3 from the point Z to the point A and the distance B3 from the point Z to the point B can be obtained through conversion; dABIs the distance from the point A to the point B;
fifthly, calculating the coordinate of the peculiar smell source P:
in another improvement, the eight wireless sensor assemblies further comprise a wireless transmission module which can transmit the concentration data detected by the metal semiconductor oxide sensor to the controller.
The technical scheme adopted by the invention for solving the second technical problem is as follows: the utility model provides a kitchen peculiar smell source detects and discharge system, includes the range hood of setting in the kitchen, its characterized in that: the range hood is characterized by further comprising a peculiar smell source detection system with the structure, the peculiar smell source detection system is electrically connected with the range hood, and the range hood is started when the peculiar smell source detection system detects a peculiar smell source and concentration data detected by any one of the eight wireless sensor assemblies exceeds a preset threshold value.
The peculiar smell source detection system is characterized by further comprising a window switch detection device for detecting whether a kitchen window is opened or not and a kitchen door switch detection device for detecting whether a kitchen door is opened or not, wherein when the window switch detection device detects a window closing signal and the kitchen door switch detection device also detects a kitchen door closing signal, the peculiar smell source detection system starts to work, otherwise, the peculiar smell source detection system does not work as long as the window is in an opening state or the kitchen door is in an opening state or the window and the kitchen door are both in the opening state.
And the room peculiar smell source detection system is integrated in a main control circuit board of the range hood.
And the range hood is improved to comprise a display screen, and after the peculiar smell source detection system detects the peculiar smell source, the position of the peculiar smell source P in the kitchen space is displayed through the display screen.
And after the peculiar smell source detection system detects the peculiar smell source, the position of the peculiar smell source P in the kitchen space is pushed to the user mobile terminal for displaying.
Compared with the prior art, the invention has the advantages that: the spatial position coordinates of the peculiar smell source in the space to be detected can be calculated according to the spatial position coordinates of the eight concentration data and the eight wireless sensor assemblies in the space to be detected, and the position of the peculiar smell source can be accurately found without human olfactory recognition under the condition that a person is not needed in a field.
Drawings
Fig. 1 is a distribution diagram of eight wireless sensor assemblies in an odor source detection system according to an embodiment of the invention.
Fig. 2 is a schematic diagram of a calculation of calculating the position of an X point according to the positions of eight wireless sensor assemblies in the odor source detection system according to the embodiment of the present invention.
Fig. 3 is a block diagram of a kitchen odor source detection and emission system in an embodiment of the present invention.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings.
Fig. 1 shows a peculiar smell source detection system, which includes eight wireless sensor assemblies distributed at different positions in a space to be detected, and a controller connected with the eight wireless sensor assemblies; the eight wireless sensor assemblies are respectively positioned at eight vertexes of a cuboid or a cube in a space to be detected, as shown in fig. 1, and each of the eight wireless sensor assemblies comprises a metal semiconductor oxide sensor, and the eight metal semiconductor oxide sensors are connected with the controller and respectively transmit concentration data detected by the eight metal semiconductor oxide sensors to the controller; after the eight wireless sensor assemblies are installed, the detection values of the corresponding metal semiconductor oxide sensors need to be calibrated in advance, for example, when a pollution source exists at a position 1cm away from the metal semiconductor oxide sensors, the detection data of the metal semiconductor oxide sensors is 99%; when a pollution source exists at a position 10cm away from the metal semiconductor oxide sensor, the detection data of the metal semiconductor oxide sensor is 89%, and when a pollution source exists at a position 50cm away from the metal semiconductor oxide sensor, the detection data of the metal semiconductor oxide sensor is 49%, … …; the controller is internally pre-stored with the spatial position coordinates of the eight wireless sensor assemblies in the space to be measured, and after receiving the concentration data detected by the eight metal semiconductor oxide sensors, the controller calculates the spatial position coordinates of the odor source in the space to be measured according to the eight concentration data and the spatial position coordinates of the eight wireless sensor assemblies in the space to be measured.
As an improvement, the controller calculates the spatial position coordinates of the odor source in the space to be measured according to the following modes:
selecting a wireless sensor component corresponding to a metal semiconductor oxide sensor with the highest value in eight concentration data as a reference point, marking the reference point as a point A, marking positions corresponding to the other three wireless sensor components in the counterclockwise direction of a top plane as a point B, a point G and a point C respectively, marking the position corresponding to the wireless sensor component opposite to the point A on a bottom plane as a point D, and marking the positions corresponding to the other three wireless sensor components in the counterclockwise direction of the bottom plane as a point E, a point H and a point F respectively; then, a three-dimensional coordinate system is established by taking the point A as a coordinate origin, the AC direction is the X-axis direction of the three-dimensional coordinate system, the AD direction is the Y-axis direction of the three-dimensional coordinate system, and the AB direction is the Z-axis direction of the three-dimensional coordinate system;
secondly, taking the point projected by the peculiar smell source P on the side plane formed by the ACFD as X, and calculating the position of the X point:
xX＝xA+u1cosαAC+v1sinαAC
yX＝yA+u1sinαAC+v1cosαAC
wherein x isXIs the X-axis coordinate of the X point in the side plane formed by the ACFD, yXY-axis coordinates of the X point in the side plane formed by the ACFD; x is the number ofAIs the X-axis coordinate of point A, yAIs the Y-axis coordinate of the point A; x is the number ofCIs the X-axis coordinate of point C, yCY-axis coordinates of point C; u. of1、v1、cosαACAnd sin alphaACAre respectively obtained by the following formulas:
a1is the distance from X point to A pointFrom, b1For the distance from the point X to the point C, since the detection values of the metal semiconductor oxide sensors at the corresponding positions are calibrated in advance after the eight wireless sensor assemblies are installed, the distance d between the point P and the point A can be obtained by using the detection data of the metal semiconductor oxide sensors at the point A and the point C1Distance e between P and C1Making a perpendicular from P to the straight line AC, making the intersection point X ', to obtain two right triangles Δ PCX' and Δ PAX ', the two right triangles sharing a right side PX', as shown in fig. 2, so that the following equation exists:
wherein g is1Is the distance between point C and point X', f1Is the distance between the point A and the point X'; dACIs the distance between point A and point C due to D in equation (1)ACD1 and e1 are known, and solving equation (1) yields f1And g1；
The following equations are given for the common right-angle side PX in the right-angle triangles Δ APX, Δ CPX and the common right-angle side X ' X in the right-angle triangles Δ AX ' X, Δ CX ' X:
due to f in equation (1)1、g1、d1、e1As is known, solving equation (1) yields a1And b1；
And thirdly, taking the point projected by the odor source P on the side plane formed by the ABED as Y, and calculating the position of the Y point:
xY＝xA+u2cosαAD-v2sinαAD
yY＝yA+u2sinαAD+v2cosαAD
wherein x isYIs the X-axis coordinate of the Y point on the side plane formed by the ABED, YYIs the Y-axis coordinate of the Y point on the side plane formed by the ABED; x is the number ofAIs the X-axis coordinate of point A, yAIs the Y-axis coordinate of the point A; x is the number ofDIs the X-axis coordinate of point C, yDY-axis coordinates of point C; u. of2、v2、cosαADAnd sin alphaADAre respectively obtained by the following formulas:
a2is the distance from point Y to point A, b2For the distance from the point Y to the point D, since the detection values of the metal semiconductor oxide sensors at the corresponding positions are calibrated in advance after the eight wireless sensor assemblies are installed, the distance a from the point Y to the point A can be obtained through conversion according to a calculation method with the same principle in the second step by using the detection data of the metal semiconductor oxide sensors at the point A and the point D2And the distance b from the point Y to the point D2；DADThe distance from the point A to the point D is shown;
step four, the point projected by the odor source P on the top plane formed by the ABGC is Z, and the position of the Z point is calculated:
xZ＝xA+u3cosαAB+v3sinαAB
yZ＝yA+u3sinαAB+v3cosαAB
wherein x isZIs a Z pointX-axis coordinate, y, on the top plane formed by ABGCZIs the Y-axis coordinate of the Z point on the top plane formed by the ABGC; x is the number ofAIs the X-axis coordinate of point A, yAIs the Y-axis coordinate of the point A; x is the number ofBIs the X-axis coordinate of point B, yBY-axis coordinates of the point B; u. of3、v3、cosαABAnd sin alphaABAre respectively obtained by the following formulas:
a3is the distance from point Z to point A, b3Is the distance from the point Z to the point B; after the eight wireless sensor assemblies are installed, the detection values of the metal semiconductor oxide sensors at the corresponding positions are calibrated in advance, so that the distance a from the point Z to the point A can be obtained through conversion by using the detection data of the metal semiconductor oxide sensors at the point A and the point B according to a calculation method with the same principle in the second step3And the distance B from the point Z to the point B3；DABIs the distance from the point A to the point B;
fifthly, calculating the coordinate of the peculiar smell source P:
in this embodiment, the eight wireless sensor assemblies further include a wireless transmission module capable of transmitting the concentration data detected by the metal-semiconductor-oxide sensor to the controller.
The embodiment also provides a kitchen odor source detection and emission system, the functional module connection block diagram of which is shown in fig. 3 and comprises a range hood arranged in a kitchen and an odor source detection system with the structure, eight wireless sensor assemblies in the odor source detection system are arranged in the kitchen, a controller of the odor source detection system is electrically connected with the range hood, and when the controller of the odor source detection system detects an odor source and concentration data detected by any one of the eight wireless sensor assemblies exceeds a preset threshold value, the range hood is started. In addition, kitchen window department is equipped with the window switch detection device whether the detection kitchen window is opened, kitchen door department is equipped with the kitchen door switch detection device whether the kitchen door is opened that is used for detecting, window switch detection device and kitchen door switch detection device all are connected with peculiar smell source detecting system's controller, detect the window closing signal when window switch detection device, and when kitchen door switch detection device also detected the kitchen door and close the signal, peculiar smell source detecting system just begins to work, otherwise as long as the window is in the open mode or the kitchen door is in the open mode or window and kitchen door all are in the open mode, peculiar smell source detecting system is out of work.
The controller of the peculiar smell source detection system can be independently arranged and can also be integrated in a main control circuit board of the range hood. And the range hood comprises a display screen, and when the peculiar smell source detection system detects the peculiar smell source, the position of the peculiar smell source P in the kitchen space is displayed through the display screen. In addition, the peculiar smell source detection system is also electrically connected with the user mobile terminal, and when the peculiar smell source detection system detects the peculiar smell source, the position of the peculiar smell source P in the kitchen space is pushed to the user mobile terminal for displaying.
Claims (8)
1. A peculiar smell source detecting system is characterized in that: the system comprises eight wireless sensor assemblies distributed at different positions in a measured space and a controller connected with the eight wireless sensor assemblies; the eight wireless sensor assemblies are respectively positioned at eight vertexes of a cuboid or a cube in a space to be detected, each wireless sensor assembly comprises a metal semiconductor oxide sensor, and the eight metal semiconductor oxide sensors are connected with the controller and respectively transmit concentration data detected by the eight metal semiconductor oxide sensors to the controller; after the eight wireless sensor assemblies are installed, the detection values of the corresponding metal semiconductor oxide sensors need to be calibrated in advance; the controller is internally pre-stored with the spatial position coordinates of the eight wireless sensor assemblies in the space to be measured, and after receiving the concentration data detected by the eight metal semiconductor oxide sensors, the controller calculates the spatial position coordinates of the odor source in the space to be measured according to the eight concentration data and the spatial position coordinates of the eight wireless sensor assemblies in the space to be measured.
2. The odor source detection system of claim 1, wherein: the controller calculates the spatial position coordinates of the peculiar smell source in the space to be measured according to the following modes:
selecting a wireless sensor component corresponding to a metal semiconductor oxide sensor with the highest value in eight concentration data as a reference point, marking the reference point as a point A, marking positions corresponding to the other three wireless sensor components in the counterclockwise direction of a top plane as a point B, a point G and a point C respectively, marking the position corresponding to the wireless sensor component opposite to the point A on a bottom plane as a point D, and marking the positions corresponding to the other three wireless sensor components in the counterclockwise direction of the bottom plane as a point E, a point H and a point F respectively; then, a three-dimensional coordinate system is established by taking the point A as a coordinate origin, the AC direction is the X-axis direction of the three-dimensional coordinate system, the AD direction is the Y-axis direction of the three-dimensional coordinate system, and the AB direction is the Z-axis direction of the three-dimensional coordinate system;
secondly, taking the point projected by the peculiar smell source P on the side plane formed by the ACFD as X, and calculating the position of the X point:
xX＝xA+u1cosαAC+v1sinαAC
yX＝yA+u1sinαAC+v1cosαAC
wherein x isXIs the X-axis coordinate of the X point in the side plane formed by the ACFD, yXY-axis coordinates of the X point in the side plane formed by the ACFD; x is the number ofAIs the X-axis coordinate of point A, yAIs the Y-axis coordinate of the point A; x is the number ofCIs the X-axis coordinate of point C, yCY-axis coordinates of point C; u. of1、v1、cosαACAnd sin alphaACAre respectively obtained by the following formulas:
a1is the distance from the point X to the point A, b1For the distance from the point X to the point C, since the detection values of the metal semiconductor oxide sensors at the corresponding positions are calibrated in advance after the eight wireless sensor assemblies are installed, the distance a from the point X to the point A can be obtained through conversion by using the detection data of the metal semiconductor oxide sensors at the point A and the point C1And the distance b from the point X to the point C1；DACIs the distance from point A to point C;
let the point of the odor source P projected on the side plane formed by ABED be Y, calculate the position of the Y point:
xY＝xA+u2cosαAD-v2sinαAD
yY＝yA+u2sinαAD+v2cosαAD
wherein x isYIs the X-axis coordinate of the Y point on the side plane formed by the ABED, YYIs the Y-axis coordinate of the Y point on the side plane formed by the ABED; x is the number ofAIs the X-axis coordinate of point A, yAIs the Y-axis coordinate of the point A; x is the number ofDIs the X-axis coordinate of point C, yDY-axis coordinates of point C; u. of2、v2、cosαADAnd sin alphaADAre respectively obtained by the following formulas:
a2is the distance from point Y to point A, b2For the distance from the point Y to the point D, since the detection values of the metal semiconductor oxide sensors at the corresponding positions are calibrated in advance after the eight wireless sensor assemblies are installed, the distance a from the point Y to the point A can be obtained through conversion according to a calculation method with the same principle in the second step by using the detection data of the metal semiconductor oxide sensors at the point A and the point D2And the distance b from the point Y to the point D2；DADThe distance from the point A to the point D is shown;
step four, the point projected by the odor source P on the top plane formed by the ABGC is Z, and the position of the Z point is calculated:
xZ＝xA+u3cosαAB+v3sinαAB
yZ＝yA+u3sinαAB+v3cosαAB
wherein x isZIs the X-axis coordinate, y, of the Z point on the top plane formed by the ABGCZIs the Y-axis coordinate of the Z point on the top plane formed by the ABGC; x is the number ofAIs the X-axis coordinate of point A, yAIs the Y-axis coordinate of the point A; x is the number ofBIs the X-axis coordinate of point B, yBY-axis coordinates of the point B; u. of3、v3、cosαABAnd sin alphaABAre respectively obtained by the following formulas:
a3is the distance from point Z to point A, b3Is the distance from the point Z to the point B; after the eight wireless sensor assemblies are installed, the detection values of the metal semiconductor oxide sensors at the corresponding positions are calibrated in advance, so that the distance a from the point Z to the point A can be obtained through conversion by using the detection data of the metal semiconductor oxide sensors at the point A and the point B according to a calculation method with the same principle in the second step3And the distance B from the point Z to the point B3；DABIs the distance from the point A to the point B;
and fifthly, calculating the position of the peculiar smell source P:
3. the odor source detection system of claim 1, wherein: the eight wireless sensor assemblies also comprise a wireless transmission module which can transmit the concentration data detected by the metal semiconductor oxide sensor to the controller.
4. The utility model provides a kitchen peculiar smell source detects and discharge system, includes the range hood of setting in the kitchen, its characterized in that: the peculiar smell source detection system of claim 1, wherein the eight wireless sensor assemblies are arranged in a kitchen, the peculiar smell source detection system is electrically connected with the range hood, and the range hood is started when the peculiar smell source detection system detects a peculiar smell source and the concentration data detected by any one of the eight wireless sensor assemblies exceeds a preset threshold value.
5. The kitchen odor source detecting and discharging system as set forth in claim 4, wherein: the peculiar smell source detection system is characterized by further comprising a window switch detection device for detecting whether a kitchen window is opened or not and a kitchen door switch detection device for detecting whether a kitchen door is opened or not, wherein when the window switch detection device detects a window closing signal and the kitchen door switch detection device also detects a kitchen door closing signal, the peculiar smell source detection system starts to work, and otherwise, the peculiar smell source detection system does not work as long as the window is in an opening state or the kitchen door is in an opening state or the window and the kitchen door are both in the opening state.
6. The kitchen odor source detecting and discharging system as set forth in claim 4, wherein: the controller of the peculiar smell source detection system is integrated in a main control circuit board of the range hood.
7. The kitchen odor source detecting and discharging system as set forth in claim 4, wherein: the range hood comprises a display screen, and after the peculiar smell source detection system detects the peculiar smell source, the position of the peculiar smell source P in the kitchen space is displayed through the display screen.
8. The kitchen odor source detecting and discharging system as set forth in claim 4, wherein: the peculiar smell source detection system is electrically connected with the peculiar smell source detection system, and when the peculiar smell source detection system detects a peculiar smell source, the position of the peculiar smell source P in the kitchen space is pushed to the user mobile terminal for displaying.
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| CN209961749U (en) * | 2019-03-27 | 2020-01-17 | 湖北大学 | Indoor harmful gas monitoring system based on ZigBee |
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| JP2005030909A (en) * | 2003-07-11 | 2005-02-03 | Shimadzu Corp | Smell distribution measurement method and apparatus, and smell generation source specifying apparatus |
| CN101561487A (en) * | 2009-05-13 | 2009-10-21 | 大连理工大学 | Indoor space locating method |
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Application publication date: 20201124 |