CN115798172A - Desk is reminded to sitting for a long time based on multisensor - Google Patents
Desk is reminded to sitting for a long time based on multisensor Download PDFInfo
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- CN115798172A CN115798172A CN202211483534.5A CN202211483534A CN115798172A CN 115798172 A CN115798172 A CN 115798172A CN 202211483534 A CN202211483534 A CN 202211483534A CN 115798172 A CN115798172 A CN 115798172A
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Abstract
The invention discloses a sedentary reminding table based on multiple sensors, which comprises a table body, wherein a pyroelectric sensor, a thermopile sensor, a pair tube sensor, a controller and a reminding unit are arranged on the table body; the pyroelectric sensor is used for detecting whether user movement exists in front of the table body; the thermopile sensor detects whether the temperature in front of the table body is stably increased/decreased; the pair tube sensor detects the distance from an obstacle in front of the table body; the controller is used for judging whether the user enters a sitting state or exits the sitting state according to results of the pyroelectric sensor, the thermopile sensor and the pair tube sensor; starting timing when the user enters the sitting state, and judging that the user is in the sitting state if the user does not exit the sitting state when the sitting threshold is reached; and the reminding unit sends out a sedentary reminder when the user is in a sedentary state. The invention can improve the accuracy when the environmental temperature is close to the human body temperature.
Description
Technical Field
The invention relates to the technical field of intelligent office, in particular to a sedentary reminding desk based on multiple sensors.
Background
Office tables are widely used in office places such as a front desk, a conference room, and an office as one of important office equipment. With the convenience of modern science and technology, more and more work is transferred from off-line to on-line, so that the working time of workers at the office table is increased, and the long-term sedentary current situation is formed.
The injury of human body caused by long-term sitting is accompanied, such as cervical spondylosis, gastrointestinal diseases, cardiovascular diseases and the like which are easy to cause. Therefore, it is necessary to take a rest for a certain time during sedentary periods, and when the staff is immersed in the learning or working process without going to eat, it is difficult to pay attention to the lapse of time at the same time, and the optimal rest time is often missed.
Based on this, the invention patent with publication number CN110326890A discloses a lifting table and station reservation system for posture detection, which detects human body through infrared temperature sensor based on thermopile. However, in the using process, a person skilled in the art finds that when the single infrared temperature sensor is used for detecting the temperature, if the ambient temperature is close to the temperature of the human body, the accuracy rate is greatly reduced. On the other hand, if a person passes by before or after the operator sits on the seat, it is difficult for the infrared temperature sensor to distinguish the signals of the two.
Therefore, how to design a sedentary reminding table capable of improving the accuracy when the ambient temperature is close to the human body temperature is one of the problems to be solved urgently.
Disclosure of Invention
In order to solve at least one technical problem mentioned in the background art, the invention aims to provide a sedentary reminding table based on multiple sensors, which can improve the accuracy when the ambient temperature is close to the temperature of a human body.
In order to achieve the purpose, the invention provides the following technical scheme:
a multi-sensor-based sedentary reminding table comprises a table body, wherein a pyroelectric sensor, a thermopile sensor, a pair tube sensor, a controller and a reminding unit are arranged on the table body;
the pyroelectric sensor is used for detecting whether user movement exists in front of the table body;
the thermopile sensor detects whether the temperature in front of the table body is stably increased/decreased;
the pair tube sensor detects the distance from an obstacle in front of the table body;
the controller is used for judging whether the user enters a sitting state or exits the sitting state according to results of the pyroelectric sensor, the thermopile sensor and the pair tube sensor; starting timing when the user enters the sitting state, and judging that the user is in the sitting state if the user does not exit the sitting state when the sitting threshold is reached;
and the reminding unit sends out a sedentary reminding when the user is in a sedentary state.
Further, the method for determining the sitting state is as follows: starting the thermopile sensor when the pyroelectric sensor detects that user activity exists; if the thermopile sensor detects that the temperature is stably increased, starting a pair tube sensor; and if the distance between the pair of tube sensors and the obstacle is detected to be smaller than a first distance threshold value, judging that the user enters a sitting state.
Further, the method for determining the sit-out state is as follows: in a sitting state, under the condition that the pyroelectric sensor detects that user activity exists, the thermopile sensor is started, if the thermopile sensor detects that the temperature is stably reduced, and the distance between the tube sensor and an obstacle is larger than a first distance threshold value; or, if the distance between the pair of tube sensors and the obstacle is larger than the second distance threshold value, the user is judged to exit from the sitting state.
Further, the second distance threshold is greater than the first distance threshold.
Further, the method for detecting the temperature steady increase/decrease is as follows:
the thermopile sensor detects a real-time temperature in front of the table body, and if the real-time temperature continues to be stable above/below a set first temperature threshold after a first time period after the thermopile sensor is turned on, the temperature is considered to be stably increased/decreased.
Further, when the thermopile sensor judges that the temperature stably rises/falls, and the opening time reaches a second time period, the thermopile sensor is closed; the second time period is greater than the first time period.
Further, the desk body is a lifting desk and comprises a sitting posture state and a standing posture state, and the height of the desk in the sitting posture state is lower than that of the desk in the standing posture state.
Further, the adjustment of the sitting posture state and the standing posture state is switched through an electric lifting mechanism, and the electric lifting mechanism is electrically connected with the controller;
furthermore, when the user enters a sitting state, if the lifting table is in a sitting state, timing is started immediately; and if the lifting table is in the standing posture state, timing is started after the lifting table is switched to the sitting posture state.
Furthermore, in the timing process, if the lifting table is switched from the sitting posture state to the standing posture state, the timing is interrupted; and if the lifting table is switched from the standing posture state to the sitting posture state, starting to count again from the switching moment.
Compared with the prior art, the invention has the beneficial effects that:
the invention can combine the results of the pyroelectric sensor, the thermopile sensor and the pair tube sensor to synthesize an effective signal which is fed back to the controller for judging that the user enters the sitting state and exits the sitting state, and then judges that the user is in the sedentary state according to the sitting duration. The device combines various sensors in the process of judging whether the user enters the sitting state or exits the sitting state, gives consideration to the performance of the sensors, and can improve the accuracy rate when the ambient temperature is close to the temperature of the human body.
Drawings
Fig. 1 is a first view structure diagram according to an embodiment of the invention.
Fig. 2 is a schematic diagram of a second viewing angle structure according to an embodiment of the invention.
Fig. 3 is a schematic structural diagram of a sensor module according to an embodiment of the invention.
Fig. 4 is a schematic diagram of the working range of the sensor according to an embodiment of the invention.
In the figure: 1. a table body; 2. a sensor module; 21. a pyroelectric sensor; 22. a thermopile sensor; 23. a pair of tube sensors; 3. a display; 4. an electric lifting mechanism; 5. a chair; 6. a user.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1 and 2, the embodiment provides a sedentary reminding table based on multiple sensors, which includes a table body 1, and a sensor module 2 capable of intelligently detecting whether a user is at a work station is arranged at the bottom of the table body 1. As shown in fig. 3, the sensor module 2 includes a pyroelectric sensor 21, a thermopile sensor 22, a pair tube sensor 23, a controller and a reminding unit;
the pyroelectric sensor 21 is used for detecting whether the user 6 moves in a detection area in front of the table body 1;
the pyroelectric sensor utilizes the pyroelectric effect and is a sensor sensitive to temperature, the pyroelectric sensor consists of ceramic oxide or piezoelectric crystal elements, electrodes are made on two surfaces of an original, and when the temperature changes in the detection range of the sensor, the pyroelectric effect can generate electric charge delta Q on the two electrodes, namely weak voltage delta V is generated between the two electrodes. Because of its extremely high output impedance, a field effect transistor is provided in the sensor for impedance conversion. The charge Δ Q generated by the pyroelectric effect is combined by ions in the air and disappears, that is, when the temperature is stable and unchanged, Δ T =0, the sensor has no output. When the user 6 enters the detection area, delta T is generated due to the difference between the human body temperature and the environment temperature, and delta T is output; if the human body is different after entering the detection area, the temperature is not changed, and the pyroelectric sensor does not output.
Therefore, the pyroelectric sensor measures the dynamic temperature difference (delta T/dt), and can be used for detecting whether the user moves in front of the table body, namely, when the user moves greatly (including the user sitting down, standing up or doing large actions on a station), the user can be detected by the pyroelectric sensor, but the sitting time of the user on the station cannot be directly judged according to the signal of the pyroelectric sensor, but the user cannot be detected by the pyroelectric sensor when the user is still or does not move on the station (in front of the table).
The thermopile sensor 22 detects whether the temperature in a detection area in front of the table body 1 is stably increased/decreased;
the thermopile sensor 22 is a pyroelectric infrared sensor, which is a device composed of thermocouples, and is formed by connecting two or more thermocouples in series, and thermoelectromotive forces output by the thermocouples are mutually superposed and used for measuring small temperature differences or average temperatures. The temperature of the object (user) to be measured and the ambient temperature in which the thermopile is located have the following relationship.
Vout=A(Tb4-Ts4)
Vout is the output voltage (V) of the thermopile
A is a proportionality coefficient
Tb is the temperature (K) of the object to be measured
Ts is the ambient temperature (K) of the thermopile
Therefore, the temperature of the measured object in a period of time can be obtained by measuring the output voltage of the thermopile and the absolute temperature of the environment where the thermopile is located and calculating.
Therefore, the thermopile sensor detects a static temperature difference, and can continuously detect the temperature of the target. However, it is also clear from the relationship between the temperature of the object to be measured (user) and the ambient temperature of the thermopile, and in this embodiment, if the ambient temperature is close to the temperature of the human body, the detection accuracy of the thermopile sensor is degraded, and it is difficult to determine whether there is a person.
The pair of tube sensors 23 detect the distance from an obstacle in a detection area in front of the table body 1. Judging whether a user exists or not according to the distance, wherein in a specific normal state, a chair 5 exists in the detection area, and the detected distance between the pair tube sensor 23 and the chair 5 is recorded as the chair distance; when the user 6 sits on the chair 5, the distance between the pair of tube sensors 23 and the user 6 detected at this time is recorded as the user distance, which is obviously less than the chair distance. The user distance < first distance threshold < chair distance may be required by setting a first distance threshold. At this time, whether a user exists in the detection area can be judged according to the detected actual distance and the size of the first distance threshold.
As shown in fig. 4, the operating ranges of the three sensors are as follows:
the working range of the pyroelectric sensor and the thermopile sensor is a sector area with an included angle B in front of the table body; the working range of the pair of tube sensors is a fan-shaped area with an included angle A in front of the table body, wherein the included angle B is larger than the included angle A.
And the controller is used for judging whether the user enters the sitting state or exits the sitting state according to the characteristics of the three sensors and the results of the pyroelectric sensor 21, the thermopile sensor 22 and the pipe sensor 23. And starting timing when the user enters the sitting state, and judging that the user is in the sitting state if the user does not exit the sitting state when the sitting threshold is reached. Next, a method of determining entry into a sitting state and a method of determining exit from a sitting state in the present embodiment will be described in detail:
the method for judging the sitting state comprises the following steps: turning on the thermopile sensor in the case that the pyroelectric sensor detects the presence of user activity; if the thermopile sensor detects that the temperature is stably increased, starting a pair tube sensor; and if the distance between the pair of tube sensors and the obstacle is detected to be smaller than a first distance threshold value, judging that the user enters a sitting state.
The pyroelectric sensor is used for detecting a signal that a user has large activity (including that the user sits down, stands up or generates large action on a station) and then starts the thermopile sensor for triggering, so that the continuous detection time of the thermopile sensor can be shortened, and the energy consumption is reduced; then, whether the user is moving in front of the table is further judged according to whether the temperature is stably increased/decreased, so that whether the user is sitting is judged.
In the existing station arrangement, two stations are usually back to back. In this case, in order to avoid the detection of a user who is active behind the workstation, the signal detected by the tube sensor can exclude signals whose distance exceeds the first distance threshold, so that signal interference behind the workstation can be avoided.
Similarly, the method for judging the exiting sitting state comprises the following steps: in the sitting state, the thermopile sensor is started under the condition that the pyroelectric sensor detects that the user moves, if the thermopile sensor detects that the temperature is stably reduced, and the distance between the tube sensor and the obstacle is larger than a first distance threshold value.
In another embodiment, the method for determining the sitting quit state further comprises another determination criterion, wherein if the pair of tube sensors detects that the distance between the tube sensors and the obstacle is greater than a second distance threshold value, the user is determined to quit the sitting state; the second distance threshold is greater than the first distance threshold.
And the reminding unit sends out a sedentary reminding when the user is in a sedentary state.
The table body 1 is provided with a display 3 for displaying the current sitting time of the user 6 in real time, and giving an image or text alarm when the user is in a sedentary state.
In the above embodiment, the stable temperature increase/decrease refers to that the temperature increase/decrease in real time is detected by the thermopile sensor and remains stable for a period of time later, in order to avoid the misjudgment caused by the user passing by the workstation, the specific detection method is as follows:
the thermopile sensor detects a real-time temperature in front of the table body, and if the real-time temperature is continuously stabilized above/below a set first temperature threshold (e.g., 30 ℃ or 34 ℃, which can be adjusted according to ambient temperatures and human body temperature data in different seasons) after a first time period (e.g., 20 s) after the thermopile sensor is turned on, the temperature is considered to be stably increased/decreased.
The first temperature threshold may be automatically adjusted according to the following method:
setting an initial value of a first temperature threshold, and adjusting a period (e.g., 1 month or 2 months);
counting the ambient temperature and the human body temperature which are measured for the first time after 12 pm every day in the regulation period, and respectively calculating the mean values; and calculating the average value of the environment temperature average value and the human body temperature average value as a first temperature threshold value of the next regulation period. Therefore, the thermopile sensor can effectively identify whether the detected temperature is the ambient temperature or the human body temperature.
In order to save energy consumption of the sensor, when the thermopile sensor judges that the temperature is stably increased/decreased, and the opening time reaches a second time period (such as 30 s), the thermopile sensor is closed; the second time period is greater than the first time period. And triggering the detection again by the thermopile sensor until the next time when the pyroelectric sensor detects the fluctuation signal.
Example two:
in this embodiment, in order to adapt to the diversity of office forms (sitting office and standing office), the table body 1 is a lifting table, and includes a sitting state and a standing state, and the height of the table in the sitting state (i.e., the height of the table corresponding to the chair where the user sits) is lower than the height of the table in the standing state (i.e., the height of the table corresponding to the ground where the user stands). The adjustment of position of sitting state and standing state is switched through electric lift mechanism 4, electric lift mechanism 4 and controller electric connection.
When a user stands on the ground for working at intervals, the harm caused by long-term sitting posture working can be effectively avoided. Therefore, when the sedentary state is judged, the posture-posture state needs to be identified, and the corresponding judgment process needs to be modified. The method specifically comprises the following steps:
when the user enters the sitting state, if the lifting table is in the sitting state, timing is started immediately. And if the lifting table is in the standing posture state, timing is started after the lifting table is switched to the sitting posture state. In the timing process, if the lifting table is switched from the sitting posture state to the standing posture state, the timing is interrupted; and if the lifting table is switched from the standing posture state to the sitting posture state, starting to count again from the switching moment.
Through the modification, the duration time of the sitting posture state can be accurately identified, and misjudgment caused by counting the time of the standing posture state into the sitting posture state is avoided.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. A long-sitting reminding table based on multiple sensors comprises a table body and is characterized in that a pyroelectric sensor, a thermopile sensor, a pair tube sensor, a controller and a reminding unit are arranged on the table body;
the pyroelectric sensor is used for detecting whether user movement exists in front of the table body;
the thermopile sensor detects whether the temperature in front of the table body is stably increased/decreased;
the pair tube sensor detects the distance from an obstacle in front of the table body;
the controller is used for judging whether the user enters a sitting state or exits the sitting state according to results of the pyroelectric sensor, the thermopile sensor and the pair tube sensor; starting timing when the user enters the sitting state, and judging that the user is in the sitting state if the user does not exit the sitting state when the sitting threshold is reached;
and the reminding unit sends out a sedentary reminding when the user is in a sedentary state.
2. The sedentary reminding table based on multiple sensors as claimed in claim 1, wherein the method for determining the sitting state is as follows: starting the thermopile sensor when the pyroelectric sensor detects that user activity exists; if the thermopile sensor detects that the temperature is stably increased, starting a pair tube sensor; and if the distance between the pair of tube sensors and the obstacle is detected to be smaller than a first distance threshold value, judging that the user enters a sitting state.
3. The multi-sensor based sedentary reminding table as claimed in claim 1, wherein the method for judging the exiting sitting state is as follows: in a sitting state, under the condition that the pyroelectric sensor detects that user movement exists, the thermopile sensor is started, if the thermopile sensor detects that the temperature is stably reduced, and the distance between the tube sensor and an obstacle is detected to be larger than a first distance threshold value; or if the distance between the pair of tube sensors and the obstacle is detected to be larger than the second distance threshold value, the user is judged to exit from the sitting state.
4. The multi-sensor based sedentary reminder table of claim 3, wherein the second distance threshold is greater than the first distance threshold.
5. A multi-sensor based sedentary reminder table according to claim 1 or 2 or 3, wherein the method of detecting the steady increase/decrease in temperature is as follows:
the thermopile sensor detects a real-time temperature in front of the table body, and if the real-time temperature continues to be stabilized above/below a set first temperature threshold after a first time period after the thermopile sensor is turned on, the temperature is considered to be stably increased/decreased.
6. A sedentary reminding table based on multiple sensors as claimed in claim 5 wherein, when the thermopile sensor determines a stable rise/fall in temperature, the thermopile sensor is turned off when the on time reaches the second time period; the second period of time is greater than the first period of time.
7. A sedentary reminding table based on multiple sensors as claimed in claim 1, wherein the table body is a lifting table, and comprises a sitting posture state and a standing posture state, and the height of the table in the sitting posture state is lower than that of the table in the standing posture state.
8. A sedentary reminding table based on multiple sensors according to claim 7, wherein the adjustment of the sitting posture state and the standing posture state is switched by an electric lifting mechanism, and the electric lifting mechanism is electrically connected with the controller.
9. A sedentary reminding table based on multiple sensors as claimed in claim 1 or 7 wherein when the user enters the sitting position, the timing is started immediately if the lifting table is in the sitting position; if the lifting table is in the standing state, timing is started after the lifting table is switched to the sitting state.
10. A sedentary reminding table based on multiple sensors as claimed in claim 9, wherein in the timing process, if the lifting table is switched from the sitting posture state to the standing posture state, the timing is interrupted; and if the lifting table is switched from the standing posture state to the sitting posture state, starting to count again from the switching moment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211483534.5A CN115798172A (en) | 2022-11-24 | 2022-11-24 | Desk is reminded to sitting for a long time based on multisensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211483534.5A CN115798172A (en) | 2022-11-24 | 2022-11-24 | Desk is reminded to sitting for a long time based on multisensor |
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| CN202211483534.5A Pending CN115798172A (en) | 2022-11-24 | 2022-11-24 | Desk is reminded to sitting for a long time based on multisensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116884083A (en) * | 2023-06-21 | 2023-10-13 | 圣奥科技股份有限公司 | Sitting posture detection method, medium and equipment based on key points of human body |
| CN116882945A (en) * | 2023-09-05 | 2023-10-13 | 圣奥科技股份有限公司 | Collaborative office method, equipment and medium based on office area station information |
-
2022
- 2022-11-24 CN CN202211483534.5A patent/CN115798172A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116884083A (en) * | 2023-06-21 | 2023-10-13 | 圣奥科技股份有限公司 | Sitting posture detection method, medium and equipment based on key points of human body |
| CN116884083B (en) * | 2023-06-21 | 2024-05-28 | 圣奥科技股份有限公司 | Sitting posture detection method, medium and equipment based on key points of human body |
| CN116882945A (en) * | 2023-09-05 | 2023-10-13 | 圣奥科技股份有限公司 | Collaborative office method, equipment and medium based on office area station information |
| CN116882945B (en) * | 2023-09-05 | 2023-12-26 | 圣奥科技股份有限公司 | Collaborative office method, equipment and medium based on office area station information |
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