CN114088977A - Oil smoke probe moving sensing device and detection method - Google Patents
Oil smoke probe moving sensing device and detection method Download PDFInfo
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- CN114088977A CN114088977A CN202111367517.0A CN202111367517A CN114088977A CN 114088977 A CN114088977 A CN 114088977A CN 202111367517 A CN202111367517 A CN 202111367517A CN 114088977 A CN114088977 A CN 114088977A
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- 239000000523 sample Substances 0.000 title claims abstract description 108
- 239000000779 smoke Substances 0.000 title claims abstract description 92
- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 230000001133 acceleration Effects 0.000 claims abstract description 137
- 230000008859 change Effects 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 7
- 239000003517 fume Substances 0.000 claims description 8
- 239000006233 lamp black Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 11
- 230000036544 posture Effects 0.000 description 28
- 230000003068 static effect Effects 0.000 description 9
- 230000005484 gravity Effects 0.000 description 8
- 230000035945 sensitivity Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/18—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration in two or more dimensions
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Abstract
The invention provides an oil smoke probe moving sensing device and a detection method, and belongs to the field of environment monitoring. The sensing device comprises a ball containing plate, a ball body, a floating cover, an acceleration sensor and a flexible connector; the ball containing plate is provided with a ball containing groove, and the ball body is movably arranged in the ball containing groove; the flexible connector comprises a guide pillar and an elastic limiting assembly, and the guide pillar is arranged on the ball containing plate; the elastic limiting assembly is arranged on the guide pillar; the floating cover is sleeved on the guide post and covers the ball containing groove; the acceleration sensor is arranged on the floating cover and used for detecting the acceleration of the floating cover; the acceleration vector can be changed due to the introduction of the motion acceleration in the moving process of the probe, the position of the ball body in the ball containing groove can be changed, the variable quantity of the acceleration vector of the floating cover is recorded and judged through the detection circuit module, the moving monitoring of the oil smoke probe is realized, and an alarm signal is sent out when the change of the acceleration vector of the floating cover exceeds a set threshold value.
Description
Technical Field
The invention relates to the field of environmental monitoring, in particular to an oil smoke probe moving sensing device and a detection method.
Background
In recent years, the supervision of oil fume treatment is continuously strengthened in various places, the catering oil fume treatment enters the normalized management, and the oil fume online monitoring equipment is also put into application in batches. The oil smoke online monitoring device detects the emission condition of oil smoke pollutants through an oil smoke probe arranged on a flue, and uploads a detection result to a monitoring data platform through a network to realize online monitoring of oil smoke emission data of catering industry.
However, in practical application, a cheating behavior that a plurality of merchants privately move the oil smoke detection probe exists, so that the measured data cannot reflect the real oil smoke emission situation, and the oil smoke monitoring is avoided.
The cheating action of moving the oil smoke probe comprises the steps of detaching the oil smoke probe from a normal installation position, installing the oil smoke probe in a transposition mode, or detaching the oil smoke probe, plugging a sampling channel of the oil smoke probe, then installing the oil smoke probe back to the original position, and the like. These cheating actions only change the position of the oil smoke probe or change the working environment of the oil smoke probe, and do not disconnect the connection between the oil smoke probe and the oil smoke monitoring instrument, which is often difficult to find, and causes the unfairness of oil smoke detection and supervision.
Disclosure of Invention
In view of the above, the present invention provides a smoke probe moving sensing device and a detection method to overcome the defects in the prior art.
The invention provides the following technical scheme: a lampblack probe moving sensing device comprises a sphere containing plate, a sphere, a floating cover, an acceleration sensor and a flexible connector; the ball containing plate is provided with a ball containing groove, and the ball body is movably arranged in the ball containing groove; the flexible connector comprises a guide post and an elastic limiting assembly, and the guide post is mounted on the ball containing plate; the elastic limiting assembly is arranged on the guide pillar; the floating cover is sleeved on the guide post and covers the ball containing groove. When the small balls roll in the ball containing grooves, the floating cover generates different inclined postures relative to the ball containing plate; the acceleration sensor is mounted on the floating cover and used for detecting the acceleration of the floating cover; note that the acceleration includes a gravitational acceleration and a motion acceleration, that is, a vector sum of the gravitational acceleration and the motion acceleration. When the probe is in a static state, the floating cover is also in a static state, and the acceleration vector measured by the acceleration sensor only comprises a gravity acceleration vector, so that in the static state, the acceleration vector reflects the inclination posture of the floating cover. The detection circuit module is electrically connected to the acceleration sensor and used for receiving the acceleration vector of the floating cover and calculating the variation of the acceleration vector of the floating cover. The probe has motion acceleration in the moving process, so that the acceleration vector of the floating cover is changed, and the position of the ball in the ball containing groove is changed. After the probe is moved, the position of the ball body in the ball containing groove is changed, the inclined posture of the floating cover is correspondingly changed, even if the probe is replaced, the ball body is difficult to return to the original position, and correspondingly, the floating cover is difficult to return to the original posture, which is expressed as the change of the acceleration vector of the floating cover, so that the moving information of the probe is fixed. When the variation of the acceleration vector of the floating cover compared with the initial acceleration vector exceeds a set threshold, the detection circuit module judges that the probe moves and sends alarm information.
In some embodiments of the invention, the elastic limit assembly comprises a spring, a limit block and a set screw; the spring is sleeved on the guide post; the limiting block is cylindrical and is sleeved on the spring; one end of the fixing screw penetrates through the limiting block and the guide post in sequence and is installed on the ball containing plate.
Furthermore, the elastic limiting assembly also comprises an adjusting pad; one end of the spring is abutted to the floating cover, the other end of the spring is abutted to one side of the adjusting pad, and the other side of the adjusting pad is abutted to the inner wall of the limiting block.
Further, the set threshold is a modulus of the amount of change of the acceleration vector of the floating cover or a cosine of the angle of change of the acceleration vector.
Further, the depth of the ball containing groove is smaller than the diameter of the ball body; the width of the ball containing groove is larger than the diameter of the ball body.
Further, the vertical distance from the edge of one side of the floating cover, which is in contact with the ball body, to the top surface of the ball containing groove is smaller than the diameter of the ball body.
Some embodiments of the present invention further provide an oil smoke probe, including a main control circuit element and the oil smoke probe moving sensing device, wherein the detection circuit module is electrically connected to the main control circuit element.
Some embodiments of the present invention further provide a method for detecting movement of an oil smoke probe, using the oil smoke probe, including the steps of:
s1, after the probe is installed and fixed, the sphere randomly obtains an initial position in the sphere containing groove, the floating cover is enabled to have an initial inclined posture, and the acceleration vector of the floating cover under the initial inclined posture is detected and recorded
S2, detecting and recording the acceleration vector of the floating cover in real time when the oil smoke probe is in the working state
S3, for
And
performing comparison and judgment;
s4, when
Relative to
When the change amount of the oil fume probe exceeds the set threshold value, the probe is considered to be moved and sends probe movement alarm information to the oil fume probe.
Further, in step S2,
for moving the probeThe acceleration vector of the floating cover in or after the movement.
Further, step S4 includes when
And with
The modulus of the difference vector is greater than the first threshold value or
And
and when the cosine of the included angle is smaller than a second threshold value, the probe is considered to be moved and an alarm signal is sent to the oil smoke probe.
The working principle and the beneficial effects of the embodiment of the invention are as follows: the ball body is movably arranged in the ball containing groove of the ball containing plate, and the floating cover covers the ball containing groove through the flexible connector, so that the floating cover is lightly pressed on the ball body. When the probe is displaced, the acceleration vector is changed due to the introduction of the motion acceleration, and the position of the ball in the ball containing groove is changed. After the probe is moved, the inclined posture of the floating cover is correspondingly changed due to the change of the position of the ball body, so that the gravity acceleration vector direction of the floating cover is changed, and the movement information of the probe is fixed. The acceleration sensor is used for detecting the acceleration vector of the floating cover, the detection circuit module is used for calculating the variation of the acceleration vector of the floating cover to realize the movement monitoring of the oil smoke probe, and an alarm signal is sent out when the variation of the acceleration vector of the floating cover exceeds a set threshold value, so that the real-time monitoring of the movement of the probe is realized.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible and comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram illustrating a view angle of a smoke probe movement sensing device according to some embodiments of the present invention;
FIG. 2 shows a cross-sectional view of section A-A of FIG. 1;
FIG. 3 shows an enlarged view of section B of FIG. 2;
fig. 4 illustrates an exploded view of a smoke probe movement sensing device provided by some embodiments of the present invention;
FIG. 5 is a schematic diagram illustrating changes in the acceleration vector of a floating cover in a smoke probe movement sensor apparatus according to some embodiments of the present invention;
fig. 6 shows a flow chart of a method for detecting movement of a smoke probe according to some embodiments of the present invention.
Description of the main element symbols:
1-a mobile sensing device; 100-ball containing plate; 200-spheres; 300-a floating cover; 400-an acceleration sensor; 500-a flexible connector; 110-ball containing groove; 510-guide pillars; 520-an elastic limit component; 310-a through hole; 521-a spring; 522-a limiting block; 523-set screw; 524-adjusting the pad.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 and 2, some embodiments of the present invention provide a smoke probe movement sensing device, which is mainly used for monitoring the movement of a smoke probe in the smoke discharge of catering industry. The oil smoke probe moving sensing device comprises a ball containing plate 100, a ball 200, a floating cover 300, an acceleration sensor 400 and a flexible connector 500.
The ball holding plate 100 is provided with a ball holding groove 110, and the ball 200 is movably disposed in the ball holding groove 110, so that the ball 200 can roll in the ball holding groove 110.
In some embodiments of the present invention, acceleration sensor 400 is a three-axis acceleration sensor.
It should be noted that the ball receiving groove 110 may be any one of an annular groove, a circular groove, a polygonal groove or a regular polygonal groove, and may be specifically set according to actual situations. In some embodiments of the invention, the ball receiving groove is an annular groove.
In addition, the flexible connector 500 includes a guide post 510 and an elastic limiting component 520, wherein the guide post 510 is mounted on the ball receiving plate 100 and is used for forming a limiting position with the floating cap 300 through the guide post 510, so as to prevent the floating cap 300 from sliding on the ball receiving plate 100.
It should be noted that the guide post 510 can be vertically placed on the ball holding plate 100, that is, the guide post 510 can be detachably mounted on the ball holding plate 100, and the mounting manner can be any one of adhesion, clamping, screw connection, and magnetic connection. In addition, the guide post 510 can also be vertically installed on the ball receiving plate 100 and integrally formed with the ball receiving plate 100. Can be specifically set according to actual conditions.
Specifically, the extending direction of the guide post 510 on the ball receiving plate 100 is the same as the opening direction of the notch of the ball receiving groove 110.
The elastic limiting component 520 is arranged on the guide post 510, and the elastic limiting component 520 and the floating cover 300 form a limiting function, so that the floating cover 300 is prevented from falling out of the ball containing plate 100, and the stability of the floating cover 300 on the ball containing plate 100 is improved.
Wherein, the floating cover 300 is sleeved on the guide post 510. It can be understood that a through hole 310 is formed in the middle of the floating cap 300, and one end of the guide post 510 penetrates through the through hole 310, so that the floating cap 300 is sleeved on the guide post 510, and the floating cap 300 is limited by the guide post 510, thereby preventing the floating cap 300 from sliding on the ball holding plate 100, and improving the stability of the floating cap 300 on the ball holding plate 100.
In order to prevent the ball 200 from falling out of the ball containing groove 110, the floating cover 300 covers the ball containing groove 110 and forms a limit with the ball 200, so that the ball 200 is always in contact with the floating cover 300 in the process of moving along the ball containing groove 110.
It should be noted that when the ball 200 rolls in the ball receiving groove 110, the floating cover 300 generates different inclined postures with respect to the ball receiving plate 100. The stopper 522 of the flexible connector can limit the lifting height of the floating cover 300, and under the restriction of the stopper and the flexible connector, the maximum distance from the floating cover 300 to the edge of the ball containing groove 110 is ensured to be smaller than the diameter of the ball 200, and this feature ensures that the ball 200 cannot fall out of the ball containing groove 110 in any posture.
The shape of the floating cover 300 may be any one of a circle, an ellipse, a polygon, a regular polygon, or an irregular shape, and may be specifically set according to actual conditions. In some embodiments of the present invention, the floating cover 300 is provided in a circular shape.
In addition, an acceleration sensor 400 is mounted on the floating cover 300. It should be noted that the acceleration sensor 400 may be installed on a side of the floating cover 300 away from the ball receiving plate 100. The acceleration sensor 400 may be installed at a side of the floating cover 300 adjacent to the ball receiving plate 100. In addition, the acceleration sensor 400 may also be installed at one side of the circumference of the floating cover 300, which may be set according to the actual situation.
In some embodiments of the present invention, an acceleration sensor 400 may be installed at a side of the floating cover 300 away from the ball receiving plate 100, and three coordinate components of an acceleration vector of the floating cover 300 are detected by the acceleration sensor 400. Note that the acceleration includes a gravitational acceleration and a motion acceleration, that is, a vector sum of the gravitational acceleration and the motion acceleration. When the motion sensor device 1 is in a stationary state, the floating cover 300 is also in a stationary state, and the acceleration vector measured by the acceleration sensor at this time includes only the gravity acceleration vector, and therefore, in the stationary state, the acceleration vector reflects the tilt posture of the floating cover 300.
The acceleration sensor 400 may be mounted on the floating cover 300 by bonding or clamping. In some embodiments of the present invention, in order to improve the stability of the acceleration sensor 400 on the floating cover 300, the acceleration sensor 400 is fixedly mounted on the floating cover 300 by welding, and the floating cover 300 is covered on the ball receiving groove 110 by a flexible connector.
In some embodiments of the present invention, a detection circuit module is disposed in the floating cover 300, and is electrically connected to the acceleration sensor 400, and is configured to receive acceleration data of the floating cover 300 detected by the acceleration sensor 400 and calculate a variation of an acceleration vector of the floating cover 300. The motion acceleration of the motion sensor device 1 during the moving process changes the acceleration vector of the floating cover 300 and changes the position of the ball 200 in the ball receiving groove. After the movement of the motion sensor 1 is completed, since the position of the ball 200 in the ball receiving groove has been changed, the tilt posture of the floating cover 300 is changed accordingly, so that the acceleration vector of the floating cover 300 is changed, thereby fixing the movement information of the motion sensor 1. When the variation of the acceleration vector of the floating cover 300 compared with the initial acceleration vector exceeds a set threshold, the detection circuit module determines that the motion sensing device 1 moves and sends an alarm message.
In addition, when the acceleration vector of the floating cover 300 is not changed, the detection circuit module does not send out an alarm signal.
Specifically, when the initial installation of the probe is completed, the ball 200 and the floating cover 300 are in a static state, and the ball 200 and the floating cover 300 both randomly obtain an initial position. The acceleration sensor 400 detects an acceleration vector of the floating cover 300
Three coordinate components ax in acceleration sensor conjoined rectangular coordinate system0，ay0And az0While receiving and recording the initial acceleration vector of the floating cover 300 through the sensing circuit module
Since the floating cover is at a standstill,
i.e., the gravitational acceleration vector, characterizes the initial tilt attitude of the floating cover 300.
The acceleration sensor 400 detects an acceleration vector of the floating cover 300 when the movement sensing device 1 moves
Three coordinate components ax in the acceleration sensor connected rectangular coordinate system1，ay1And az1At this time, the acceleration vector
Is the vector sum of the gravity acceleration and the motion acceleration. After the movement of the movement sensing device is completed and the movement sensing device is in a static state again, the position of the ball 200 in the ball containing groove is changed in the previous movement, so that the inclined posture of the floating cover 300 relative to the ball containing plate is changed, and the acceleration vector measured by the acceleration sensor at the moment
Is the gravity acceleration vector, which reflects the tilt attitude of the mobile sensing device at the new position.
At this time, the amount of change in the acceleration vector of the floating cover is calculated by the detection circuit module. When the variation of the acceleration vector of the floating cover compared with the initial acceleration vector exceeds a set threshold, the detection circuit module judges that the probe moves and sends alarm information.
The set threshold value is a modulus of the amount of change in the acceleration vector of the floating cover or a cosine of the angle of change in the acceleration vector.
As shown in fig. 2 to 5, in some embodiments of the present invention, the elastic limiting component 520 includes a spring 521, a limiting block 522 and a fixing screw 523, the spring 521 is sleeved on the guide post 510, and one end of the spring 521 abuts against the ball receiving plate 100, and under the action of the spring 521, the floating cover 300 is slightly pressed on the ball 200.
The limiting block 522 is cylindrical, and the limiting block 522 is sleeved on the spring 521.
Specifically, one end of the fixing screw 523 sequentially passes through the limiting block 522 and the guide post 510, and is mounted on the ball containing plate 100, and the limiting block 522 limits the lifting height of the floating cover 300, so as to prevent the ball 200 from falling out of the ball containing groove 110.
As shown in fig. 3 and 4, in some embodiments of the present invention, in order to adjust the pressure of the floating cover 300 on the ball 200, the elastic limiting component 520 further includes an adjusting pad 524, one end of the spring 521 abuts against the floating cover 300, the other end of the spring 521 abuts against the adjusting pad 524, the adjusting pad 524 is sandwiched between the spring 521 and the limiting pad 522, and the thickness of the adjusting pad 524 can be adjusted to adjust the pressure applied to the ball 200 by a small amplitude, so as to adjust the motion sensitivity of the ball 200, and thus, the ball 200 is in an opportunistic balanced state when the ball holding board 100 is inclined by a small amplitude.
As shown in fig. 1 and 2, in some embodiments of the present invention, in order to improve the smoothness of the ball 200 rolling in the ball receiving groove 110, the width of the ball receiving groove 110 is greater than the diameter of the ball 200. It should be noted that, here, the width of the ball receiving groove 110 refers to the difference between the outer diameter and the inner diameter of the ball receiving groove 110.
As shown in fig. 1 and 2, in some embodiments of the present invention, the floating cover 300 is covered on the ball receiving groove 110 by the flexible connector 500, and is slightly pressed on the ball 200 by the spring 521. When the ball 200 rolls in the ball receiving groove 110, the floating cover 300 generates different inclined postures with respect to the ball receiving plate 100. The limiting block 522 of the flexible connector 500 limits the floating cover 300 and the lifting height of the floating cover 300, so that the maximum distance from the floating cover 300 to the edge of the ball receiving groove 110 is less than the diameter of the ball 200, and this feature ensures that the ball 200 cannot fall out of the ball receiving groove 110 in any posture.
In addition, in some embodiments of the present invention, a printed circuit board may be further installed in the floating cover 300, and a detection circuit module is provided on the printed circuit board, and is configured to receive the acceleration of the floating cover 300, calculate a variation of the acceleration vector of the floating cover 300 accordingly, and send an alarm signal when the variation of the acceleration vector of the floating cover 300 exceeds a set threshold.
The invention also provides an oil smoke probe, which comprises a main control circuit element and the mobile sensing device 1 in any one of the embodiments, wherein the detection circuit module is electrically connected with the main control circuit element. The main control circuit element is used for receiving an alarm signal sent by the detection circuit module.
It should be noted that the mobile sensing device 1 may be installed as a single part inside the oil smoke probe, or may be integrated with a part inside the oil smoke probe, and when the oil smoke probe is installed and fixed, the ball containing plate 100 in the mobile sensing device 1 is basically in a horizontal position.
In addition, in some embodiments of the present invention, in order to avoid other people to detach the mobile sensing device 1 from the smoke probe, the smoke probe mobile sensing device 1 is fixedly installed inside the smoke probe.
When the oil smoke probe is fixedly installed on the flue, the ball containing plate 100 is approximately kept horizontal, the ball 200 is in a random balanced state in the ball containing groove 110 and has a random position, so that the floating cover 300 has a random inclined posture, and the acceleration sensor 400 on the floating cover 300 measures the acceleration vector of the floating cover 300 in real time.
After the oil smoke probe is installed, the floating cover 300 is static, only gravity acceleration exists, three coordinate components of the acceleration reflect the inclined posture of the floating cover 300 and are called as the inclined posture coordinates of the floating cover 300, the detection circuit module records the initial inclined posture coordinates of the floating cover 300 after the oil smoke probe is installed, and if the oil smoke probe keeps static, the posture is also kept unchanged.
Specifically, the acceleration sensor 400 on the floating cover 300 measures the acceleration vector of the floating cover 300, and the measured acceleration vector is expressed by coordinate components in three coordinate directions of a rectangular coordinate system of a connected space of the floating cover.
When the oil smoke probe moves, the change of the posture of the oil smoke probe or the vibration of a certain amplitude causes the ball 200 to roll in the ball containing groove 110, so that the inclined posture of the floating cover 300 is changed, and the acceleration sensor 400 recognizes the movement of the oil smoke probe by detecting the change of the acceleration vector of the floating cover 300.
Specifically, the oil smoke probe has a motion acceleration during the moving process, which changes the acceleration vector of the floating cover 300 and changes the position of the ball in the ball receiving groove 110. After the movement of the oil smoke probe is completed, since the position of the ball 200 in the ball containing groove 110 has been changed, the inclined posture of the floating cover 300 has been changed accordingly, so that the acceleration vector of the floating cover 300 is changed, thereby fixing the movement information of the oil smoke probe. When the variation of the acceleration vector of the floating cover 300 compared with the initial acceleration vector exceeds a set threshold, the detection circuit module determines that the probe moves and sends alarm information.
It should be noted that the sensitivity of the movement of the ball 200 determines the sensitivity of the measurement, and the sensitivity of the movement of the ball 200 is proportional to the mass of the ball 200 and inversely proportional to the maximum static friction force experienced by the ball 200. After the movement sensing device is set, the friction coefficient between the ball 200 in the ball receiving groove 110 and the ball receiving plate 100 is unchanged, so that the maximum static friction force exerted on the ball 200 is directly proportional to the pressure exerted on the spring 521, and the pressure exerted on the ball 200 can be adjusted by adjusting the thickness of the adjusting pad 524 in the flexible connector 500, thereby adjusting the motion sensitivity of the ball 200.
In addition, the pressure of the spring 521 on the floating cover 300 can be adjusted according to actual conditions, so that the ball 200 is in a random equilibrium state under the condition that the ball containing plate 100 is inclined by a small amplitude. So that it is difficult to restore the position of the ball 200 to its original position when the position is changed.
Therefore, even if the oil smoke probe is moved in the case of power failure, the position of the ball 200 is changed and it is difficult to return to the original position again, and thus it is difficult for the floating cover 300 to return to the original tilted posture again. When the oil smoke probe is electrified to work again, the acceleration sensor can detect the change of the acceleration vector of the floating cover 300 caused by the change of the posture, so that the movement of the oil smoke probe is identified, and an alarm signal is sent out.
As shown in fig. 6, the present invention further provides a method for detecting movement of a smoke probe, using the smoke probe according to any of the above embodiments, including the following steps:
step S1, after the oil smoke probe is installed and fixed, the initial acceleration vector of the floating cover is detected and recorded
Specifically, after the oil smoke probe is installed and fixed, the sphere and the floating cover are stationary, the sphere containing plate 100 is approximately kept horizontal, the sphere 200 is in a randomly balanced state in the sphere containing groove 110 and has a random position, and therefore the floating cover 300 has a random initial inclined posture and keeps stable.
When the fume probe is energized, the floating cover 300 is in a stationary state. At this time, the floating cover 300 is acted only by the gravitational acceleration, and the initial acceleration vector of the floating cover is detected and recorded
Acceleration vector
Three coordinate components a in a sensor connected space rectangular coordinate systemx0，ay0And az0Reflecting the tilt posture of the floating cover 300, called tilt posture coordinates of the floating cover 300, and recording the acceleration vector of the floating cover 300 through the detection circuit module
Namely, it is
Step S2, the oil smoke probe is in working positionDetecting and recording the acceleration vector of the floating cover in real time under the working state
Specifically, in the operating state of the oil smoke probe, the vector of the floating cover 300 is detected by the acceleration sensor 400
Three coordinate components a of sensor connected rectangular coordinate systemx1，ay1And az1And the acceleration quality is recorded in real time by the detection circuit module, that is,
as shown in fig. 5, the spatial rectangular coordinate system 0-x, y, z is a global coordinate system of the acceleration sensor 400, which is also a global coordinate system of the floating cover 300. When the oil fume probe is in the moving process,
is the sum vector of the gravity acceleration vector and the motion acceleration vector of the floating cover 300. When the oil smoke probe is moved and then is fixedly arranged or statically arranged again,
the gravity acceleration vector of the floating cover 300 in the new posture.
Step S3, for
And
and (6) carrying out comparison and judgment.
It should be noted that although the global coordinate system of the acceleration sensor is inclined with respect to the world coordinate system although the gravitational acceleration is always plumb-down in the world coordinate system, in the global coordinate system 0-x, y, z of the acceleration sensor,
and with
Are not in the same direction.
Step S4, when
Relative to
When the variation of the oil smoke detector exceeds a certain set threshold value, an alarm signal is sent to the oil smoke detector.
It should be noted that when
And
when the modulus of the difference vector is larger than the first threshold value, the detection circuit module judges that the probe is moved and sends an alarm signal to a main control circuit element of the oil smoke probe.
Specifically, the first threshold is defined as e when
It is determined that the oil smoke probe is moved.
In addition, the first and second substrates are,
and
when the cosine of the included angle is smaller than a second threshold value, the detection circuit module judges that the probe is moved and sends an alarm signal to a main control circuit element of the oil smoke probe.
Specifically, will be describedThe two thresholds are defined as p and are defined simultaneously
And
is theta when
It is determined that the oil smoke probe is moved.
In some embodiments of the invention, step S3 includes moving the smoke probe while the smoke probe is powered on; or when the oil smoke probe is powered off, the oil smoke probe is powered on again after the oil smoke probe is moved.
In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above examples are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. A lampblack probe moving sensing device is characterized by comprising a ball containing plate, a ball body, a floating cover, an acceleration sensor and a flexible connector;
the ball containing plate is provided with a ball containing groove, and the ball body is movably arranged in the ball containing groove;
the flexible connector comprises a guide post and an elastic limiting assembly, and the guide post is arranged on the ball containing plate;
the elastic limiting assembly is arranged on the guide pillar;
the floating cover is sleeved on the guide post and covers the ball containing groove;
the acceleration sensor is mounted on the floating cover and used for detecting the acceleration of the floating cover;
a detection circuit module is arranged in the floating cover and electrically connected to the acceleration sensor, and the detection circuit module is used for receiving and recording the acceleration vector of the floating cover and calculating the variation of the acceleration vector of the floating cover;
and when the variation of the acceleration vector of the floating cover exceeds a set threshold, the detection circuit module sends out an alarm signal.
2. The lampblack probe moving sensing device as claimed in claim 1, wherein the elastic limiting component comprises a spring, a limiting block and a fixing screw;
the spring is sleeved on the guide post;
the limiting block is cylindrical, and one end of the fixing screw penetrates through the limiting block and the guide pillar in sequence and is installed on the ball containing plate.
3. The fume probe movement sensing device according to claim 2, wherein the elastic limiting assembly further comprises an adjusting pad;
one end of the spring is abutted to the floating cover, the other end of the spring is abutted to one side of the adjusting pad, and the other side of the adjusting pad is abutted to the inner wall of the limiting block.
4. The smoke probe movement sensing device of claim 1, wherein the set threshold is a modulus of the amount of change of the acceleration vector of the floating cover or a cosine of the angle of change of the acceleration vector.
5. The smoke probe moving and sensing device of claim 1, wherein the depth of the ball containing groove is smaller than the diameter of the ball body; the width of the ball containing groove is larger than the diameter of the ball body.
6. The smoke probe movement sensing device of claim 1, wherein the vertical distance from the side of the floating cover contacting the sphere to the top surface of the sphere containing groove is smaller than the diameter of the sphere.
7. An oil smoke probe, characterized by comprising a main control circuit element and the oil smoke probe moving sensing device as claimed in any one of claims 1 to 6, wherein the detection circuit module is electrically connected to the main control circuit element.
8. A method for detecting the movement of a smoke probe, which is characterized by using the smoke probe of claim 7, comprising the steps of:
s1, after the oil smoke probe is installed and fixed, detecting and recording the initial acceleration vector of the floating cover
S2, detecting and recording the acceleration vector of the floating cover in real time when the oil smoke probe is in the working state
S3, for
And
carrying out comparison and judgment;
s4, when
Relative to
When the variation of the oil smoke detector exceeds a certain set threshold value, an alarm signal is sent to the oil smoke detector.
9. The method for detecting the movement of a smoke probe according to claim 8, wherein in step S2,
the acceleration vector of the floating cover in the moving process or after the moving of the oil smoke probe.
10. The method for detecting the movement of an oil smoke probe according to claim 8, wherein the step S4 includes
And
the modulus of the difference vector is greater than the first threshold value or
And
and when the cosine of the included angle is smaller than a second threshold value, an alarm signal is sent to the oil smoke probe.
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