CN217955250U - Appearance is reminded to position of sitting based on laser rangefinder - Google Patents

Abstract

The utility model discloses an appearance is reminded to position of sitting based on laser rangefinder belongs to the position of sitting and reminds the appearance field, and its aim at causes when adopting ultrasonic wave or infrared rangefinder for solving existence among the prior art and reminds the serious problem of appearance wrong report. The sitting posture reminding instrument comprises a shell, wherein a micro processing unit (MCU), a laser ranging module and a prompting module are arranged in the shell, a signal output end of the laser ranging module is connected with a distance signal input end of the MCU, an alarm signal output end of the MCU is connected with an input end of the prompting module, and the laser ranging module adopts a time of flight (TOF) laser ranging module. Laser that TOF laser rangefinder module produced can form the less light cone of cone angle, only hangs down to apart from the desktop certain distance or causes because of the position of sitting nonstandard that user's positions such as head, chest, shoulder enter into the detection light cone within range of rangefinder module for a certain time just can trigger and remind, indicate at the head, should remind the appearance and be difficult for causing the wrong report, remind the accuracy higher.

Description

Appearance is reminded to position of sitting based on laser rangefinder

Technical Field

The utility model relates to a technical field is rectified to the position of sitting relates to a position of sitting reminds the appearance, especially relates to an adopt laser rangefinder's position of sitting to remind appearance.

Background

For students in middle and primary schools, the learning state of daily learning is a problem which cannot be ignored, and good learning state can concentrate attention and improve learning efficiency. An obvious index of the learning state is the personal sitting posture standard degree, and the standard sitting posture enables others to feel that the person is in a state of concentration at a glance. The irregular sitting posture not only can lead to the attention being not concentrated enough to influence the learning efficiency, but also can influence the body health more seriously. Research shows that when a student leans forward in learning, the vision of the student is affected when the student reads and writes too close to a book, and the situation of myopia, high myopia and the like can be caused when the student cannot sit at a standard position for a long time. The habit of the students of sitting untimely and bending over and humpback can not only affect the personal image and quality, but also affect the normal development of the students, and induce various diseases such as scoliosis, cervical spondylosis, lumbar spondylosis and the like.

The sitting posture problem of the students is not worried about for the self-disciplined students as to how to keep the students in the correct sitting posture; however, for the involuntary students, only the teacher or the parents can supervise and urge the students at ordinary times, but the effect of the method is not ideal, because some students are unconscious due to untimely sitting postures, and habits are naturally formed over time, so that the learning state is influenced. For teachers, it is almost impossible to give a lecture on a platform and to note whether the learning state or sitting posture of dozens of people in the whole class is problematic. For parents, the children can only watch the learning situation occasionally, and the children cannot watch the sitting posture of the children at all times. For this reason, instruments and devices related to sitting posture reminding are gradually generated.

The existing sitting posture reminding instrument mainly comprises a hanging neck type instrument, a desktop supporting type instrument and a desktop placing type instrument.

The so-called neck hanging type is shown in fig. 1, which means that a user hangs an instrument on the neck, the main instrument is attached to the back, when the user bends down and bends his head, the inclination angle of the instrument is driven to change, and a threshold value is triggered to remind the user to adjust and keep a standard sitting posture. Although the hanging neck type reminding instrument reminds a user of normalizing the sitting posture by detecting the bending amplitude of the back, the hanging neck type reminding instrument can not detect the distance between eyes of the user and a desktop due to the fact that the hanging neck type reminding instrument is attached to the back of the user, and the sitting posture correction effect of the user is limited.

The so-called desktop supporting type is shown in figure 2, and means that the supporting device is fixed on a desktop, and on one hand, the supporting device can limit the minimum distance from the head to the desktop and prevent the head and eyes from being too close to the desktop; the support device can also limit the forward leaning of the user's body. This bearing formula device can effectively avoid user's eyes to be too close to the desktop, but in the in-service use process, especially long-term use in-process, the user can habitually lean on the health to press on bearing formula device, and the head is directly placed on bearing formula device's U type rack, and the above-mentioned health part of user desktop all directly leans on to press on bearing formula device, and oneself need not or use a small part of strength can, form worse position of sitting custom over a long time.

The desktop placement type is, as shown in fig. 3, that is, the reminder is placed at a certain distance right in front of the desktop exercise book, and the reminder reminds the user to adjust the sitting posture by measuring the distance between the head or eyes of the user and the reminder when the distance is too short. However, the reminder can only measure the distance between the head or eyes of the user and the reminder, and when the distance does not trigger the threshold, the head or eyes of the user are too close to the desktop, so that the reminder cannot accurately detect the problem that the eyes of the user are too close to the desktop.

In order to realize distance detection, the conventional reminding instrument is easy to damage eyes of a user due to the fact that common laser has strong light, and therefore the distance detection is carried out by adopting the principle of ultrasonic ranging or infrared ranging; and when the detected distance is smaller than the threshold value, reminding and prompting are triggered. However, when the reminder using ultrasonic ranging or infrared ranging is used, the ultrasonic ranging or infrared ranging can cause a more obvious near-field detection phenomenon, which causes a serious false alarm situation of the reminder and affects the use effect of a user.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in order to solve the serious problem of reminding appearance wrong report that causes when adopting ultrasonic wave or infrared range finding that exist among the prior art, the utility model provides a position of sitting reminds appearance based on laser rangefinder.

The utility model discloses a realize above-mentioned purpose and specifically adopt following technical scheme:

the utility model provides an appearance is reminded to position of sitting based on laser rangefinder, includes the casing, is provided with microprocessing unit MCU, laser rangefinder module and suggestion module in the casing, and the signal output part of laser rangefinder module is connected with microprocessing unit MCU's distance signal input part, and microprocessing unit MCU's alarm signal output part is connected with the input of suggestion module, laser rangefinder module adopts TOF laser rangefinder module.

Preferably, the TOF laser ranging module is a model VL53L0X or VL53L1X TOF laser ranging module.

Preferably, laser emitted by the TOF laser ranging module is emitted through a laser hole in the top surface of the shell to form a light cone with the taper theta of 2-3 degrees and the height H of 2-500 cm.

The utility model has the advantages as follows:

the utility model discloses in, this position of sitting reminds appearance adopts TOF laser rangefinder module, TOF laser rangefinder module can select for use VL53L0X or VL53L1X, its built-in 940nmVCSEL transmitter can emit not be the laser of a kind that people's eye sees totally, a kind of laser is harmless to people's eye, can place under user's chin, can directly detect the distance of user's head or head part region (for example eyes) apart from the desktop, this detection distance can directly reflect the distance of user's eyes apart from the desktop, eyes are higher apart from the distance detection precision of desktop, also can in time remind, indicate when the position of sitting nonstandard leads to head or eyes to be closer apart from the desktop simultaneously; in addition, the laser that TOF laser rangefinder module produced is and outwards launches the back, can form the little light cone of cone angle, the near field detection effect that can produce is more weak, the user is being close to the seat and sits down, the in-process of normally writing is difficult for being detected, only hang down to the certain distance apart from the desktop or because of the position of sitting nonstandard cause user's head, chest, position such as shoulder enter into the detection light cone within range of rangefinder module for a certain time just can trigger and remind, the suggestion, this reminds the appearance and is difficult for causing the wrong report, it is higher to remind the accuracy.

Drawings

FIG. 1 is a schematic structural diagram of a neck hanging type reminder in the prior art;

FIG. 2 is a schematic diagram of a prior art desktop supporting reminder;

FIG. 3 is a schematic structural diagram of a desktop reminder in the prior art;

fig. 4 is a schematic structural diagram of the present invention;

fig. 5 is a schematic structural view of the middle sitting posture reminder of the present invention;

FIG. 6 is a schematic view of the installation of the laser holes and the Fresnel mirror in the present invention;

FIG. 7 is a schematic view of the installation of the laser ranging module and the infrared human body sensing module of the present invention;

fig. 8 is a schematic view of the usage status of the sitting posture reminder of the present invention;

wherein the reference numerals are: the system comprises a shell 1, a laser hole 2, a Fresnel mirror 3, a prompt lamp band 4, a loudspeaker 5, a mounting groove 6, a laser ranging module 7, an infrared human body sensing module 8 and a mounting base 9.

Detailed Description

Example 1

The embodiment provides an appearance is reminded to position of sitting based on laser rangefinder, which comprises a housin, be provided with microprocessing unit MCU in the casing, laser rangefinder module and prompt module, the signal output part of laser rangefinder module is connected with microprocessing unit MCU's distance signal input part, the distance data transmissible to microprocessing unit MCU that laser rangefinder module gathered, microprocessing unit MCU carries out data processing to the distance data gathered, judge whether it is less than preset's threshold value and output corresponding alarm signal. The alarm signal output end of the microprocessing unit MCU is connected with the input end of the prompting module, the alarm signal of the microprocessing unit MCU can be transmitted to the prompting module, and the prompting module gives out whether to prompt according to the alarm signal.

In this embodiment, the MCU employs a bluetooth chip, which is responsible for computing, determining, and controlling. This bluetooth chip can adopt the Norwegian brand: NORDIC, manufacturer model: NRF52832-QFAA-R, or the domestic brand: tailing microelectronics, manufacturer model: TLSR8258F512ET 48. .

The laser ranging module adopts a TOF laser ranging module, and the TOF laser ranging module adopts a TOF laser ranging module with the model number of VL53L0X or VL53L 1X. VL53L0X, VL L1X are all a new generation of time of flight TOF laser ranging modules, and the minimum package in the current market is adopted, so that accurate distance measurement can be provided no matter how the target reflectivity is; VL53L0X can measure 2m absolute distance, VL53L1X can measure 5m absolute distance, a leading SPAD array (single photon avalanche diode) is integrated, and ST is embedded in the second generation FlightSense technology; and the laser emitted by the 940nm VCSEL emitter (vertical cavity surface emitting laser) is not seen by human eyes at all and cannot cause damage to the human eyes, and the built-in physical infrared filter is added, so that the distance measurement distance is longer, the immunity to ambient light is stronger, and the stability to optical crosstalk of the cover plate is better.

Laser emitted by the TOF laser ranging module is emitted through a laser hole in the top surface of the shell to form a light cone with the taper theta of 2-3 degrees and the height H of 2-500 cm.

Still including handheld terminal, handheld terminal reminds the appearance to pass through bluetooth, wifi, 4G or 5G with the position of sitting and is connected, reminds the warning distance threshold value of appearance, long threshold value when triggering through handheld terminal setting position of sitting to select and remind the mode and remind intensity. The handheld terminal can be a mobile phone or a tablet computer, corresponding APPs are installed on the mobile phone or the tablet computer, data transmission is achieved through the APPs, the data transmission comprises setting of a warning distance threshold value and a triggering time length threshold value of a sitting posture reminding instrument, and a reminding mode and reminding strength are selected; of course, the handheld terminal can also be a controller, and the controller directly realizes the setting and selection of the warning distance threshold, the triggering time length threshold, the reminding mode and the reminding intensity of the sitting posture reminding instrument through corresponding buttons on the controller.

The working process of the sitting posture reminding instrument is as follows:

presetting a threshold height and a holding time of a light cone of a TOF laser ranging module (for example, the threshold height is set to be 30cm, the holding time is 5s, namely when a foreign matter enters the light cone and the distance from the light cone to a reminder is less than 30cm, and the holding time of the state exceeds 5s, a reminding function is triggered), placing a sitting posture reminder at a proper position (a position close to a chest) of a desk, enabling a user to sit, and starting a working mode of the sitting posture reminder; under the working mode, the TOF laser ranging module is used for detecting the situation right above the sitting posture prompting instrument in real time by emitting laser which does not harm human bodies (particularly eyes); when the micro processing unit MCU analyzes that the head, neck, chest or shoulder of the user enters the threshold height range of the light cone (for example, the minimum distance between the head, neck, chest or shoulder of the user and the reminder is less than 30 cm), and the state is kept at 5s or above, the prompting module generates a prompting signal to prompt and prompt, and the prompting signal can be a voice prompt (for example, voice broadcast: please pay attention to sitting posture), a vibration prompt (for example, vibration of a vibrator), and a light prompt (for example, a prompting lamp is lighted and flickers).

Example 2

Most of the existing reminding instruments are directly placed on a desktop, but users or surrounding personnel can move the positions of the reminding instruments in an intentional or unintentional process, for example, the users or the surrounding personnel collide the desk to make the reminding instruments fall off.

Therefore, the embodiment is also provided with a mounting base used for being mounted on a carrier in a matching way, and the carrier comprises places for a user to write and learn, such as a learning table, a desk, an office table and the like; the bottom of the shell is provided with a mounting groove, and the size and the shape of the mounting groove are matched with those of the mounting base.

Preferably, the installation base is adsorbed in the installation groove at the bottom of the shell in a magnetic adsorption mode.

When the reminder is used, the mounting base is pre-mounted on the carrier, then the reminder is mounted on the mounting base, and the mounting base is clamped in the mounting groove at the bottom of the reminder; because installation base card is in the mounting groove, remind the appearance to fix in installation base position department, touch down to remind the appearance or collide the desk condition at carelessness under, remind the appearance to hardly produce on the desktop and remove, more be difficult for dropping from the desktop.

Example 3

Because the appearance is reminded to the position of sitting is placed the desktop on back, the laser that laser rangefinder module produced is vertical ascending usually, and the cone angle of laser is less, therefore the position of sitting reminds the appearance and hardly detects whether the user reminds the appearance around the position of sitting.

Therefore, the appearance is reminded to position of sitting in this embodiment has increased infrared near field detection function, still is provided with infrared human response module in the casing promptly, and infrared human response module is connected with little processing unit MCU, and fresnel mirror is installed to the casing top surface, and human infrared jitter signal penetrates into the infrared human response module in the casing after fresnel mirror refraction, and infrared human response module adopts current conventional infrared human response module can. The Fresnel mirror is arranged and the installation position of the Fresnel mirror is adjusted, so that the deflection condition of the Fresnel mirror is adjusted, and surrounding infrared light can be collected in a wider range.

The specific detection steps are as follows:

before sitting posture detection, a near-field distance threshold value and a near-field time length threshold value of the infrared human body induction module are preset; when sitting posture is detected, the infrared human body induction module detects the infrared shaking condition within the near-field distance threshold range; the stable human body infrared light enters the human body infrared sensor through the Fresnel lens and does not trigger any reaction; if the infrared light shakes, an electric signal is triggered and generated, and people around the electric signal is randomly judged.

During detection, if the micro processing unit MCU judges that infrared jitter exists in the threshold range of the near-field distance and the duration of the infrared jitter exceeds the threshold of the near-field duration, the micro processing unit MCU triggers awakening and the laser ranging module starts to detect; and if the micro processing unit MCU judges that no infrared jitter exists in the near-field distance threshold range or the infrared jitter duration does not exceed the near-field duration threshold, the dormancy is triggered, and the laser ranging module stops detection.

The working process of the sitting posture reminding instrument is as follows:

the sitting posture prompting instrument is installed/placed on a table top, and after a user sits on the table, human body infrared light in a larger range can enter the shell through the Fresnel mirror and be received by the infrared human body sensing module under the action of the Fresnel mirror; an infrared human body induction module of the reminder senses that human body infrared shaking signals exist within the range of 20cm around the reminder and continues the state for a certain time, then the infrared human body induction module outputs detection signals to a microprocessing unit (MCU), and the microprocessing unit (MCU) outputs control signals and wakes up the reminder; after the user leaves the seat, the infrared human body induction module of the reminder senses that no human body infrared shaking signal exists in the range of 20cm around the user and continues the state for a certain time, then the infrared human body induction module outputs a detection signal to the microprocessing unit MCU, and the microprocessing unit MCU outputs a control signal and enables the reminder to enter a sleep mode.

Example 4

In this embodiment, the prompt module includes speaker, vibrator, suggestion lamp area, speaker, vibrator, suggestion lamp area adopt conventional device can, and speaker, vibrator, suggestion lamp area are equallyd divide and are connected with microprocessing unit MCU electricity respectively.

When the sitting posture adjusting lamp is used, when the head, the neck, the chest or the shoulders of a user enter the threshold height range of the light cone and last for a certain time, the micro-processing unit MCU sends control signals to the loudspeaker, the vibrator and the prompting lamp strip respectively, the loudspeaker gives out a voice prompt of 'please notice the sitting posture', the vibrator generates vibration, the light of the prompting lamp strip is lightened, and the user is reminded to adjust the sitting posture from multiple aspects of voice, vibration, light and the like. In addition, the loudspeaker, the vibrator and the prompting lamp strip can be selected alternatively or in combination, the volume of the loudspeaker, the vibration intensity of the vibrator, the brightness and the color of the prompting lamp strip and the like can be set individually.

Claims (2)

1. The utility model provides an appearance is reminded to position of sitting based on laser rangefinder, includes casing (1), its characterized in that: a microprocessing unit (MCU), a laser ranging module (7) and a prompting module are arranged in the shell (1), the signal output end of the laser ranging module (7) is connected with the distance signal input end of the microprocessing unit (MCU), the alarm signal output end of the microprocessing unit (MCU) is connected with the input end of the prompting module, and the laser ranging module (7) adopts a TOF laser ranging module;

laser emitted by the TOF laser ranging module is emitted through a laser hole (2) on the top surface of the shell (1) to form a light cone with the taper theta of 2-3 degrees and the height H of 2-500 cm.

2. The sitting posture reminding instrument based on the laser ranging as claimed in claim 1, characterized in that: the TOF laser ranging module is a TOF laser ranging module with the model of VL53L0X or VL53L 1X.

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