阅读说明：本技术 一种座椅坐姿监测装置及控制方法 (Seat sitting posture monitoring device and control method ) 是由 倪良正 张叙俊 朱志华 方东根 于 2018-08-13 设计创作，主要内容包括：本发明涉及矫正座椅技术领域,现有的矫正座椅装置,存在识别盲区；本发明提供了一种座椅坐姿监测装置,包括设置于椅背上并用于感应人体位置的传感器、控制电路以及报警电路,所述传感器包括至少一个接近传感器,所述接近传感器设置于椅背的内侧；当用户坐于椅座上且其背部与接近传感器的距离在接近传感器的预设检测范围内时,所述接近传感器检测到用户背部并产生一检测信号；所述控制电路接收并响应于所述检测信号并触发报警电路；减小识别盲区,增加识别率。(The invention relates to the technical field of corrective seats, and the existing corrective seat device has identification blind areas; the invention provides a sitting posture monitoring device for a chair, which comprises a sensor, a control circuit and an alarm circuit, wherein the sensor is arranged on a chair back and used for sensing the position of a human body; when a user sits on the seat and the distance between the back of the user and the proximity sensor is within the preset detection range of the proximity sensor, the proximity sensor detects the back of the user and generates a detection signal; the control circuit receives and responds to the detection signal and triggers an alarm circuit; reduce the discernment blind area, increase the recognition rate.)

1. A seat sitting posture monitoring device comprises a sensor, a control circuit (5) and an alarm circuit (4), wherein the sensor is arranged on a seat back (1) and used for sensing the position of a human body, the seat sitting posture monitoring device is characterized in that the sensor comprises at least one proximity sensor (2), and the proximity sensor (2) is arranged on the inner side of the seat back (1); when a user sits on the chair seat and the distance between the back of the user and the proximity sensor (2) is within the preset detection range of the proximity sensor (2), the proximity sensor (2) detects the back of the user and generates a detection signal; the control circuit (5) receives and responds to the detection signal and triggers an alarm circuit (4).

2. The monitoring device of claim 1, wherein: the proximity sensor (2) is a capacitive proximity sensor (2), and a metal foil (21) or a metal mesh for enlarging a signal receiving range is arranged on the capacitive proximity sensor (2).

3. The monitoring device of claim 2, wherein: the metal foil (21) or the metal mesh is attached, and the length of the metal foil (21) or the metal mesh extends in the horizontal direction.

4. The monitoring device of claim 2, wherein: the preset detection range is 0.5cm to 8 cm.

5. The monitoring device of claim 3, wherein: the chair back (1) comprises a back frame (11), a filling layer (12) filled on the back frame (11) and a mesh fabric covering the outer surfaces of the back frame (11) and the filling layer (12); the surface of the filling layer (12) is provided with a shallow groove matched with the metal foil (21) or the metal mesh in size, and the middle of the shallow groove is provided with a groove for embedding the proximity sensor (2); two sides of the metal foil (21) or the metal mesh are bonded with the bottom surface of the shallow groove, and the middle of the metal foil (21) or the metal mesh is bonded with the outer surface of the proximity sensor (2).

6. the monitoring device of any one of claims 1 or 2, wherein: the sensor or control circuit (5) is always in a sleep state; the monitoring device further comprises a wake-up circuit (3); the wake-up circuit (3) comprises an acceleration sensor coupled to the control circuit (5); when a user sits on the chair, the vibration generated by the user is detected by the acceleration sensor and a wake-up signal is generated by the acceleration sensor, and the control circuit (5) wakes up or is woken up the sensor after receiving the wake-up signal.

7. The monitoring device of claim 6, wherein: the alarm circuit (4) comprises a loudspeaker (42) and a voice chip (41); the input end of the voice chip (41) receives the alarm signal, and the output end of the voice chip is coupled with a loudspeaker (42); when the voice chip (41) is triggered by the control circuit (5), the voice chip (41) emits pre-stored voice information, so that the loudspeaker (42) gives out voice prompt to prompt a user to correct sitting posture in time.

8. A control method of a sitting posture monitoring device for controlling the monitoring device as claimed in claim 7, wherein: the control circuit (5) starts timing when being awakened and enters a dormant state again after timing Ts; when the control circuit (5) enters the dormant state again, the alarm circuit (4) is disconnected; and the control circuit (5) resets the timing Ts to zero after receiving the wake-up signal every time in the wake-up state.

9. The control method according to claim 8, characterized in that: in the wake-up state, the control circuit (5) delays T after receiving the detection signal₀And after s, triggering an alarm circuit (4).

10. The control method according to claim 8, characterized in that: the speech information describes a piece of audio with a silence segment at the beginning.

Technical Field

The invention relates to the technical field of corrective seats, in particular to a seat sitting posture monitoring device and a control method.

Background

The existing sitting posture correcting seat usually detects the sitting posture through a pressure sensor, for example, chinese patent No. 2012203755103 discloses a seat device for preventing bad sitting posture, which uses a multi-point weight sensing device, i.e. a back sensor and two waist sensors, to determine whether the sitting posture is correct.

If a user wears fluffy down jackets and even normally wears the down jackets, the back of the user cannot be identified by the seat of the sensor even if the waist and the back are just attached to the backrest without receiving enough pressure. The seat cannot judge whether the sitting posture of the user is correct. Therefore, a device and a method for monitoring the sitting posture of a seat with high recognition rate are urgently needed.

disclosure of Invention

The invention aims to solve the technical problem of overcoming the defect of low recognition rate in the prior art and provides a seat sitting posture monitoring device with high recognition rate and a control method.

In order to achieve the purpose, the invention is realized by the following technical scheme: a seat sitting posture monitoring device comprises a sensor, a control circuit and an alarm circuit, wherein the sensor is arranged on a seat back and used for sensing the position of a human body, the sensor comprises at least one proximity sensor, and the proximity sensor is arranged on the inner side of the seat back; when a user sits on the seat and the distance between the back of the user and the proximity sensor is within the preset detection range of the proximity sensor, the proximity sensor detects the back of the user and generates a detection signal; the control circuit receives and responds to the detection signal and triggers an alarm circuit.

Adopt above-mentioned technical scheme, use proximity sensor to replace current pressure sensor to measure human back position, as long as human back is located within proximity sensor's detection range just can be detected, has realized promptly that human position of sitting also can be discerned under the condition of contactless or dabbing, has improved the recognition rate greatly.

The further preferable scheme of the invention is as follows: the proximity sensor is a capacitance type proximity sensor, and a metal foil or a metal mesh used for increasing a signal receiving range is arranged on the capacitance type proximity sensor. When the back of a human body approaches to the vicinity of a certain area of the metal foil or the metal mesh, the charge distribution of the area is changed, and the charge distribution can be indirectly detected by the capacitive proximity sensor.

The further preferable scheme of the invention is as follows: the metal foil or the metal mesh is attached, and the length of the metal foil or the metal mesh extends in the horizontal direction. The detection range in the horizontal direction is further increased.

the further preferable scheme of the invention is as follows: the preset detection range is 0.5cm to 8 cm. And selecting the data range with the most reference value according to a large amount of experimental data.

The further preferable scheme of the invention is as follows: the chair back comprises a back frame, a filling layer filled on the back frame and a mesh fabric covering the back frame and the filling layer; a shallow groove with the size matched with that of the metal foil or the metal mesh is arranged on the surface of the filling layer, and a groove for embedding the proximity sensor is arranged in the middle of the shallow groove; and two sides of the metal foil or the metal mesh are bonded with the bottom surface of the shallow groove, and the middle of the metal foil or the metal mesh is bonded on the outer surface of the proximity sensor. The metal foil or the metal net has good flexibility, and can deform along with the back of a human body when the back of the human body leans against the chair back without discomfort.

The further preferable scheme of the invention is as follows: the sensor or the control circuit is always in a dormant state; the monitoring device further comprises a wake-up circuit; the wake-up circuit comprises an acceleration sensor coupled to the control circuit; when a user sits on the chair, the vibration generated by the user is detected by the acceleration sensor and the acceleration sensor generates a wake-up signal, and the control circuit wakes up or is awakened after receiving the wake-up signal.

By adopting the technical scheme, the situation that the alarm circuit is triggered by mistake when no one sits on the chair can be avoided, and the electricity is saved.

The further preferable scheme of the invention is as follows: the alarm circuit comprises a loudspeaker and a voice chip; the input end of the voice chip receives the alarm signal, and the output end of the voice chip is coupled with a loudspeaker; when the voice chip is triggered by the control circuit, the voice chip emits pre-stored voice information to enable the loudspeaker to give out voice prompt so as to prompt a user to correct sitting postures in time.

A further object of the present invention is to provide a control method for a sitting posture monitoring device of a seat, which is used for controlling the monitoring device, wherein the control circuit starts timing when being awakened and enters a sleep state again after timing Ts; when the control circuit enters the dormant state again, the alarm circuit is broken; and in the awakening state, the control circuit resets the timing Ts to zero after receiving the awakening signal every time.

The further preferable scheme of the invention is as follows: in the wake-up state, the control circuit delays T after receiving the detection signal₀And triggering an alarm circuit after s. When the back of the human body goes back and forth in and out of the preset range in a short time, the alarm circuit is enabled to alarm in a delayed mode so as to prevent frequent alarm.

The other preferable scheme of the invention is as follows: the speech information describes a piece of audio with a silence segment at the beginning. By the setting method, the effects of delaying alarm and preventing frequent alarm can be achieved.

In conclusion, the invention has the following beneficial effects: compare in current pressure sensor's monitoring mode, the mode that capacitanc proximity sensor detected human back position is adopted to this scheme, can improve the position of sitting and detect the recognition rate.

Drawings

FIG. 1 is a schematic view of a sitting posture monitoring device;

FIG. 2 is a block circuit diagram of a sitting posture monitoring device;

FIG. 3 is a schematic circuit diagram of a proximity sensor;

FIG. 4 is a schematic diagram of a control circuit;

FIG. 5 is a schematic diagram of a wake-up circuit;

FIG. 6 is a schematic diagram of an alarm circuit;

Fig. 7 is a schematic diagram of a power supply circuit.

In the figure: 1. a chair back; 11. a back frame; 12. a filling layer; 2. a proximity sensor; 21. a metal foil; 22. a filter shaping circuit; 23. an A/D conversion circuit; 3. a wake-up circuit; 4. an alarm circuit; 41. a voice chip; 42. a speaker; 5. a control circuit.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

As shown in fig. 1 and 2, a sitting posture monitoring device for a chair is shown, which comprises a sensor arranged on a chair back 1 and used for sensing the position of a human body, a wake-up circuit 3, a control circuit 5, an alarm circuit 4 and a power circuit. The sensor and the wake-up circuit 3 are respectively in signal connection with the control circuit 5, and the alarm circuit 4 is in control connection with the control circuit 5. The wake-up circuit 3, the control circuit 5, the alarm circuit 4 and the power circuit are all arranged in the chair back.

The sensor comprises at least one proximity sensor 2, the proximity sensor 2 is arranged on the inner side of the chair back 1, and the distance from the proximity sensor 2 to the lower edge of the chair back 1 is 15 cm-30 cm. The proximity sensor 2 is a capacitive proximity sensor 2, and a metal foil 21 or a metal mesh for increasing a signal reception range is provided on the capacitive proximity sensor 2. The metal foil 21 or the metal mesh is attached and the length of the metal foil 21 or the metal mesh extends in the horizontal direction. The metal foil 21 is an aluminum foil or a tin foil. The area of the metal foil 21 is one square centimeter or more. In this embodiment, a proximity sensor 2 is used, the proximity sensor 2 amplifying the signal range by means of tin foil.

The chair back 1 comprises a back frame 11, a filling layer 12 filled on the back frame 11 and a mesh fabric covering the outer surfaces of the back frame 11 and the filling layer 12; the surface of the filling layer 12 is provided with a shallow groove with the size matched with that of the metal foil 21, and the middle of the shallow groove is provided with a groove for embedding the proximity sensor 2; both sides of the metal foil 21 are bonded to the bottom surface of the shallow groove, and the middle of the metal foil 21 is bonded to the outer surface of the proximity sensor 2.

When a user sits on the chair seat and the distance between the back of the user and the proximity sensor 2 is within the preset detection range of the proximity sensor 2, the proximity sensor 2 detects the back of the user and generates a detection signal, and the control circuit 5 receives the detection signal and sends a voice broadcast signal to trigger the alarm circuit 4. The preset detection range is 0.5cm to 5 cm.

The sensor or control circuit 5 is always in a dormant state and needs to be awakened by the awakening circuit 3 during working. The wake-up circuit 3 comprises an acceleration sensor coupled to the control circuit 5; when a user sits on the chair, the vibration generated by the user is detected by the acceleration sensor and the acceleration sensor generates a wake-up signal, and the control circuit 5 wakes up or awakens the sensor after receiving the wake-up signal. Preferably, the sensor and the control circuit 5 are both always in a sleep state, and the control circuit 5 wakes up the sensor while receiving the wake-up signal.

the alarm circuit 4 comprises a loudspeaker 42 and a voice chip 41; the input end of the voice chip 41 receives the alarm signal, and the output end thereof is coupled to the speaker 42; when the voice chip 41 is triggered when receiving the voice broadcast signal, the voice chip 41 emits the pre-stored voice information, and the loudspeaker 42 receives and responds to the voice information to emit voice prompt to prompt the user to correct the sitting posture in time.

As shown in fig. 3-7, in the present embodiment, the capacitive proximity sensor J2 is coupled to the input terminal of the control circuit 5 chip through a filter shaping circuit 22 and an a/D conversion circuit 23. The A/D conversion circuit 23 adopts a chip U4 with the model of FDC2114RGHR, the control circuit 5 adopts a chip U3 with the model of MSP430F5528IRGC, the acceleration sensor adopts an integrated chip U5, and the voice chip 41 adopts a U6.

Two output terminals of the filter shaping circuit 22 are sequentially coupled to the PINs 15 and 16 of the chip U4. If two acceleration sensors are used, the other acceleration sensor is coupled to the PINs 14 and 13 of the chip U4 in turn after passing through the other filter-shaping circuit 22. The PIN1, the PIN2, the PIN4, the PIN5 and the PIN6 of the chip U4 are coupled to the PIN43, the PIN42, the PIN21, the PIN19 and the PIN20 of the chip U3 in turn. The PIN4, the PIN6 and the PIN11 of the chip U5 are coupled to the PIN1, the PIN2 and the PIN3 of the chip U3 in turn. The PINs 2 and 3 of the chip U6 are coupled to the PIN4 of the chip U3, and the PINs 4 and 5 of the chip U6 are coupled to the speaker 42. The peripheral circuits of the chips are referred to the manual, and are not described in detail here.

The power supply circuit adopts a rechargeable battery to generate +3.3V and +5V direct current through a voltage stabilizing circuit to provide the direct current for each circuit, and the circuits of the power supply circuit are well known in the art and are not described in detail herein.

The invention also provides a control method of the seat sitting posture monitoring device, which is used for controlling the monitoring device, wherein the control circuit 5 starts to time when being awakened and enters the dormant state again after the time Ts is counted; when the control circuit 5 enters the dormant state again, the alarm circuit 4 is disconnected; in the wake-up state, the control circuit 5 resets the timing Ts to zero after receiving the wake-up signal every time.

In the awakening state, the control circuit 5 triggers the alarm circuit 4 after receiving the detection signal and delaying T0s, so that the effects of delaying alarm and preventing frequent alarm can be achieved.

Or, the effect of delaying alarm and preventing frequent alarm can be achieved by recording the audio frequency of a silent section of the opening band in the voice information. The duration of the silent period is 3 seconds or more than 3 seconds.

The working process of the invention is as follows: after the power is switched on, the proximity sensor 2 and the control circuit 5 are both in a dormant state, and the alarm circuit 4 is also in a state to be activated. When a user sits down on the seat, a shock is generated, which is detected by an acceleration sensor provided on the chair back 1. The acceleration sensor generates a wake-up signal after detecting the vibration, and the wake-up signal is transmitted to the control circuit 5 and wakes up the control circuit 5. At the same time as the control circuit 5 is woken up, the proximity sensor 2 is woken up.

At this time, the proximity sensor 2 starts to work, and when the distance between the back of the user and the proximity sensor 2 is between 0cm and 0.5cm (the numerical range changes along with the change of the preset range), the user sits correctly, and the loudspeaker 42 does not sound.

When the distance between the back of the user and the proximity sensor 2 is 0.5-8cm (or 2-6cm, which can be changed according to the size of the user), the user has bad sitting posture, after the back of the user is detected by the proximity sensor 2, the proximity sensor 2 generates a detection signal, the control circuit 5 receives and responds to the detection signal and generates a voice broadcast signal, and the voice chip 41 is triggered when receiving the voice broadcast signal. When the voice chip 41 is triggered, pre-stored voice information is emitted, and the loudspeaker 42 receives and responds to the voice information to emit voice prompt to prompt a user to correct sitting postures in time.

When the user's back is more than 8cm away from the proximity sensor 2 (which varies with the preset range), the user leaves the seat and the speaker 42 does not sound.

In order to better reduce energy consumption and prolong the service time of the battery, the awakening time is set to be T by the control chip₀I.e., a delayed off time. When the control chip receives the last wake-up signal, the control chip passes through T₀After s, the sleep is started again without receiving the next wake-up signal.