Seating monitoring desk lamp and monitoring method

Abstract

The present invention relates to a seating monitoring desk lamp and a monitoring method. The desk lamp comprises: a first infrared sensor pair, wherein one or more first infrared sensor pairs are provided in total and are located on a lampshade of the desk lamp; a second infrared sensor pair, wherein one or more second infrared sensor pairs are provided in total and are located on a lamp post of the desk lamp; a motion sensor, which is located on the desk lamp; and a controller, which is connected to each of the first infrared sensor pair, the second infrared sensor pair and the motion sensor. Compared with the prior art, in the present invention, by means of adding the motion sensor on the basis of the infrared sensor pairs and modifying seating determination logic, privacy can be taken into consideration on one hand, and on the other hand, the problem of seating being mistakenly detected due to the use of a simple shielding reflector for interference can also be avoided; moreover, the accuracy can also be improved by means of multi-state determination instead of using a simple binary determination method.

Description

Seating monitoring desk lamp and monitoring method TECHNICAL FIELD

[0001] The present application relates to the field of intelligent desk lamps, in particular to a seating monitoring desk lamp and a monitoring method. BACKGROUND

[0002] In some fields, it is necessary to monitor and analyze the state of learning and work. For this purpose, some existing technologies use infrared living body detection to determine whether the monitored object is seated on a seat. For example, Chinese patent CN205079089U discloses a body part infrared transceiver pair for anti-myopia desk lamp to determine whether a person is seated, and a head infrared transceiver pair for determining the sitting posture. However, this method has the following defects. Since it only uses the infrared transceiver pair of the body part to determine whether a person is seated, it is prone to misjudgment. For example, for some high-backed chairs, the reflection can cause false positives. If a person intentionally blocks the infrared rays, it can also cause false positives.

[0003] To solve the defects of infrared sensor technology, some existing technologies use image technology to solve this problem. For example, Chinese patent CN112633232A discloses a method of using a camera on a desk lamp to achieve seating monitoring and sitting posture monitoring using machine vision technology.

[0004] However, the scheme based on machine vision technology can lead to a large amount of calculation. If edge computing is completely implemented, the cost is high. If cloud computing is used, users may have concerns about privacy. In addition, there is a problem that the user intentionally blocks the lens, causing the device to malfunction.

[0005] Therefore, it is urgent for those skilled in the art to develop a seating monitoring desk lamp that can protect privacy and improve accuracy. SUMMARY

[0006] The purpose of the present application is to provide a seating monitoring desk lamp and a monitoring method. By adding a motion sensor to the infrared sensor pair and modifying the seating determination logic, the privacy can be protected, the problem of false monitoring caused by simple shielding of reflective objects can be avoided, and the accuracy can be improved by using multiple states instead of simple binary determination.

[0007] The purpose of the present application can be achieved by the following technical solutions:

[0008] A seating monitoring desk lamp comprises:

[0009] A first infrared sensor pair, one or more pairs are provided, located on the lampshade of the desk lamp;

[0010] The second infrared sensor pair is arranged on the lamp post of the desk lamp.

[0011] The motion sensor is arranged on the desk lamp.

[0012] The controller is connected to the first infrared sensor pair, the second infrared sensor pair and the motion sensor respectively, and is configured to perform the following steps:

[0013] The signal of the first infrared sensor pair is acquired, and the pulse-transmitting ratio of the first infrared sensor pair is generated, wherein the pulse-transmitting ratio of the infrared sensor pair is the ratio of the number of received infrared pulses to the number of emitted infrared pulses in a test period.

[0014] The signal of the second infrared sensor pair is acquired, and the pulse-transmitting ratio of the second infrared sensor pair is generated.

[0015] The signal output by the motion sensor is acquired, and a motion determination signal is generated when an object in the monitoring range produces motion.

[0016] When in the unseated state, if the pulse-transmitting ratios of the first infrared sensor pair and the second infrared sensor pair both exceed a first set threshold, the possible seated state is entered, and timing is started.

[0017] When in the possible seated state, if either of the pulse-transmitting ratios of the first infrared sensor pair and the second infrared sensor pair is less than the first set threshold, the unseated state is returned to.

[0018] When in the possible seated state for more than a first set time length, the seated state is entered.

[0019] When in the seated state, if the pulse-transmitting ratios of the first infrared sensor pair and the second infrared sensor pair are both less than a second set threshold, or no motion determination signal is received for a second set time length, the possible unseated state is entered, and timing is started.

[0020] When in the possible unseated state, if either of the pulse-transmitting ratios of the first infrared sensor pair and the second infrared sensor pair is greater than the second set threshold, and a motion determination signal is received, the seated state is returned to.

[0021] When in the possible unseated state for more than a third set time length, the unseated state is entered.

[0022] The second set threshold is less than the first set threshold.

[0023] The test periods of all infrared sensor pairs are staggered, and each test period is composed of multiple minimum evaluation periods.

[0024] The motion sensor is a pyroelectric sensor.

[0025] The desk lamp further comprises a loudspeaker, and the controller is configured to further perform the following steps:

[0026] When entering the possible leaving state caused by not receiving the motion determination signal for a continuous second set time length, voice or light prompt information is sent out.

[0027] When in the non-seated state, if the pulse transmission / reception ratios of the first infrared sensor pair and the second infrared sensor pair both exceed a first set threshold, the possible seated state is entered, and timing is started, comprising:

[0028] When in the non-seated state, if a motion determination signal is received, the first infrared sensor pair and the second infrared sensor pair are controlled to start working;

[0029] After at least delaying for a variable window time period, if the pulse transmission / reception ratios of the first infrared sensor pair and the second infrared sensor pair both exceed the first set threshold, the possible seated state is entered, and timing is started.

[0030] The controller is configured to further perform the following steps:

[0031] The time lengths of the continuous seated state and the possible leaving state are accumulated as work / learning time lengths, if the work / learning time lengths exceed a fourth set time length, light prompts for reminding rest are sent out, and a forced rest state is entered;

[0032] When in the forced rest state, the light is dimmed, and the seated state is suspended from being monitored.

[0033] After the fifth set time length elapses, the forced rest state ends, and the seated state is resumed to be detected.

[0034] After the seated state is resumed to be detected, when it is detected that a person is seated, the work / learning time length accumulation of the next stage is restarted.

[0035] The controller is configured to further perform the following steps:

[0036] During the accumulation stage of the work / learning time length, if it is detected that the person leaves, the time accumulation is suspended.

[0037] After it is detected that the person re-seats, the time accumulation is continued; or after the fifth set time length elapses, the person is still not detected to return, and the accumulation of the work / learning time length of this round is ended.

[0038] The controller is configured to further perform the following steps:

[0039] At any time, manual triggering is accepted, and the accumulation of the work / learning time length is closed or restarted.

[0040] A seated monitoring method, comprising:

[0041] acquiring signals of the first infrared sensor pair, and generating a pulse-transmit-receive ratio of the first infrared sensor pair, wherein the pulse-transmit-receive ratio of the infrared sensor pair is a ratio of the number of received infrared pulses to the number of emitted infrared pulses within a test period;

[0042] acquiring signals of the second infrared sensor pair, and generating a pulse-transmit-receive ratio of the second infrared sensor pair;

[0043] acquiring signals output by the motion sensor, and generating a motion determination signal when an object in the monitoring range produces motion;

[0044] when in the unseated state, if the pulse-transmit-receive ratios of the first infrared sensor pair and the second infrared sensor pair both exceed a first set threshold, entering a possible seated state, and starting a timer;

[0045] when in the possible seated state, if either of the pulse-transmit-receive ratios of the first infrared sensor pair and the second infrared sensor pair is less than the first set threshold, returning to the unseated state;

[0046] when in the possible seated state for more than a first set time length, entering a seated state;

[0047] when in the seated state, if the pulse-transmit-receive ratios of the first infrared sensor pair and the second infrared sensor pair are both less than a second set threshold, or no motion determination signal is received for a second set time length, entering a possible unseated state, and starting a timer;

[0048] when in the possible unseated state, if either of the pulse-transmit-receive ratios of the first infrared sensor pair and the second infrared sensor pair is greater than the second set threshold, and a motion determination signal is received, returning to the seated state;

[0049] when in the possible unseated state for more than a third set time length, entering the unseated state.

[0050] Compared with the prior art, the present application has the following beneficial effects:

[0051] 1. By adding a motion sensor to the infrared sensor pair and modifying the seated determination logic, on the one hand, privacy can be taken into account, and on the other hand, the problem of false monitoring of a seated state caused by simple interference with a shielding reflector can be avoided, and by using a multi-state determination rather than a simple binary determination, the accuracy can also be improved.

[0052] 2. In the extremely small probability case, the device may be misjudged as unseated due to the user's excessive concentration and long inactivity. In this case, when the device enters the possible unseated state, a voice or light prompt will be issued, and the user can adjust the sitting posture in time to avoid misjudgment.

[0053] 3、Second set threshold is less than the first set threshold, so set, can reduce the probability of misjudgment into the sitting state due to interference factors, and the misjudgment of leaving seat caused by random posture after normal sitting.

[0054] 4、The motion sensor adopts a pyroelectric sensor, which is lower in cost and higher in working stability.

[0055] 5、The cumulative working or learning time is adaptively counted, and a rest reminder is realized, so that the use experience is better, and the health of the user can be maintained. BRIEF DESCRIPTION OF DRAWINGS

[0056] Fig. 1 is a structural schematic diagram of the present application;

[0057] Fig. 2 is a sitting monitoring process schematic diagram in an embodiment of the present application;

[0058] Fig. 3 is a system composition schematic diagram in an embodiment of the present application;

[0059] Fig. 4 is a pulse transmission and reception ratio acquisition process schematic diagram of the infrared sensor pair;

[0060] Fig. 5 is a working and learning and rest process control schematic diagram;

[0061] Wherein: 1, sensor unit, 2, controller, 3, light control unit, 4, interactive unit, 5, communication unit, 6, memory card reader, 7, camera, 8, speaker, 9, microphone, 11, first infrared sensor pair, 12, second infrared sensor pair, 13, motion sensor, 41, state indicator light, 42, display control screen, 43, light control switch, 51, WiFi module, 52, wireless communication module. DETAILED DESCRIPTION

[0062] The present application will be described in detail below in combination with the drawings and specific embodiments. The present embodiment is implemented on the basis of the technical scheme of the present application, and detailed implementation and specific operation process are given, but the protection scope of the present application is not limited to the following embodiments.

[0063] A sitting monitoring desk lamp, as shown in Figs. 1 and 3, comprises:

[0064] The first infrared sensor pair 11 is provided with one or more, located on the lampshade of the desk lamp, corresponding to the head of the person, wherein in the present embodiment, two are provided;

[0065] Second infrared sensor pair 12, one or more are provided, located on the lamp post of the desk lamp, for the torso of the human body, in this embodiment, one second infrared sensor pair 12 and two first infrared sensor pairs 11 form a triangular large-area infrared reflection area

[0066] Motion sensor 14, located on the desk lamp;

[0067] Controller 2, connected to first infrared sensor pair 11, second infrared sensor pair 12 and motion sensor 14 respectively, as shown in FIG. 2, configured to perform the following steps:

[0068] Obtain the signal of the first infrared sensor pair 11, and generate the pulse transmission ratio of the first infrared sensor pair 11, wherein the pulse transmission ratio of the infrared sensor pair is the ratio of the number of received infrared pulses to the number of emitted infrared pulses in the test period;

[0069] Obtain the signal of the second infrared sensor pair 12, and generate the pulse transmission ratio of the second infrared sensor pair 12;

[0070] Obtain the signal output by the motion sensor 13, and generate a motion determination signal when there is a moving object;

[0071] When in the unseated state, if the pulse transmission ratios of the first infrared sensor pair 11 and the second infrared sensor pair 12 both exceed the first set threshold, enter the possible seated state, and start timing, during which, since the high back chair generally will not be as high as the head position, at least will not interfere with the signals of the first infrared sensor pair 11 and the second infrared sensor pair 12;

[0072] When in the possible seated state, if either of the pulse transmission ratios of the first infrared sensor pair 11 and the second infrared sensor pair 12 is less than the first set threshold, return to the unseated state;

[0073] When the time in the possible seated state exceeds the first set time length, enter the seated state, in this embodiment, the first set time length is 3 seconds, of course, in other embodiments, other designs can also be used;

[0074] When in the seated state, if the pulse transmission ratios of the first infrared sensor pair 11 and the second infrared sensor pair 12 are both lower than the second set threshold, or no motion determination signal is received within the continuous second set time length, enter the possible unseated state, and start timing, in this embodiment, the second set time length is 90 seconds, of course, in other embodiments, other designs can also be used;

[0075] When in the possible unseated state, if either of the pulse-transmitting ratios of the first infrared sensor pair 11 and the second infrared sensor pair 12 is greater than the second set threshold value, and a motion determination signal is received, the seated state is returned to;

[0076] When the time in the possible unseated state exceeds a third set time length, the unseated state is entered, in this embodiment, the third set time length is 10 seconds, of course, in other embodiments, other designs can also be used.

[0077] By adding the motion sensor 13 on the basis of the infrared sensor pair, and modifying the seated determination logic, on the one hand, the privacy can be taken into account, and on the other hand, the problem of false monitoring of the seated state caused by simple shielding of the interference object can be avoided, and at the same time, through the multi-state determination, rather than the simple binary determination, the accuracy can also be improved.

[0078] In addition, by using the pulse-transmitting ratio as the output signal feature of the infrared sensor pair, the reliability is more reliable.

[0079] In most embodiments, the second set threshold value is less than the first set threshold value, in this embodiment, the first set threshold value is 90%, and the second set threshold value is 50%.

[0080] In some embodiments, the test periods of all infrared sensor pairs are staggered, and each test period is composed of a plurality of minimum scoring periods, as shown in FIG. 4, the first infrared sensor pair 11 is the first infrared sensor pair 11, and the third infrared sensor pair is the second infrared sensor pair 12. When each infrared sensor pair is working, the other infrared sensor pairs do not work. Secondly, the single infrared transmitting-receiving pair transmits a 38K modulated PWM, and the received waveform at the receiving end is a demodulated waveform, and the single infrared transmitting-receiving period is divided into a plurality of minimum scoring periods, so that the error caused by the less receiving of some periods or the more receiving of some periods can be prevented, and the scoring is more accurate. One minimum scoring period receives one pulse, which is 100 points, if one or more pulses are received due to interference, it is 50 points, and if no pulse is received, it is 0 point. Finally, the average score in the recent time window is calculated by using the slip algorithm.

[0081] In addition, in some embodiments, the signal output by the motion sensor 13 is obtained, and when the object in the monitoring range moves, the motion determination signal is generated, including:

[0082] The signal output by the motion sensor 13 is obtained;

[0083] If the signal output by the motion sensor 13 is indicative of the movement of the object in the monitoring range, the motion determination signal is generated.

[0084] In such embodiments, generally, the motion sensor 13 is a pyroelectric sensor, thus, on one hand, the cost is lower, on the other hand, the working stability is higher, in particular, in the present embodiment, the pyroelectric sensor is adjusted to output a pulse lasting for 2 seconds when detecting the movement of an object, and then continue to repeat the detection.

[0085] Of course, in another part of the embodiments, the signal output by the motion sensor 13 is acquired, and when there is a moving object, a motion determination signal is generated, including:

[0086] Acquiring the time sequence signal output by the motion sensor 13;

[0087] According to the current time and the preconfigured length, a motion signal sliding window is obtained, and according to the motion signal sliding window, the time sequence signal is intercepted to obtain a to-be-detected signal;

[0088] The to-be-detected signal is wavelet transformed to obtain the frequency components contained in the time sequence signal and the existence time length and intensity of each component;

[0089] If the existence time length of the frequency component with the maximum intensity is less than a threshold proportion of the length of the to-be-detected signal, the to-be-detected signal is generated.

[0090] By using the signal frequency analysis combined with the wavelet transform mode, the interference source of the periodic motion change can be accurately found, so as to avoid being interfered, for example, when the user prevents some motion interference by rotating or swinging, it can be found, thereby having stronger anti-interference ability.

[0091] In addition, in some embodiments, the desk lamp further comprises a loudspeaker 8, and the controller 2 is configured to further perform the following steps:

[0092] When entering the possible off-seat state caused by not receiving the motion determination signal for a continuous second set length, a light prompt information is issued, and the content of the voice prompt can be a prompt "please adjust the sitting posture" and the like, of course, in other embodiments, light or screen reminder can also be used. Avoiding the false off-seat judgment caused by the user being too focused.

[0093] In addition, in some embodiments, the desk lamp is provided with a multi-person office mode, in which mode, in the process from the presence state to the confirmed leaving, the weight of the human activity sensor is appropriately reduced (because the effective detection distance is far, it is easy to be disturbed), and the weight of the infrared transmitting and receiving sensor is increased (the detection distance is closer, it is not easy to be disturbed). In addition, the change of the light is used instead of the voice prompt when alarming.

[0094] As shown in FIG. 3, in the present embodiment, in addition to the speaker 8, a microphone 9, a memory card reader 6, a camera 7, a light control unit 3, a communication unit 6, and an interaction unit 4 can also be configured, the communication unit 6 can include a WiFi module 51 and a wireless communication module 52, the interaction unit 4 can include a status indicator light 41, a display control screen 42, and a light control switch 43, the display control screen 42 can adopt the form of a touch screen or a combination of a normal display screen and keys. The light control unit 3 can adopt a 2-way PWM control cold and warm light source for adjusting the color temperature and brightness of the light source, and the wireless communication module 52 supports the insertion of a mobile phone SIM card.

[0095] In some embodiments, when in the unseated state, if the pulse transmission ratios of the first infrared sensor pair 11 and the second infrared sensor pair 12 both exceed the first set threshold, enter the possible seated state and start timing, including:

[0096] When in the unseated state, if a motion determination signal is received, control the first infrared sensor pair 11 and the second infrared sensor pair 12 to work;

[0097] After at least delaying for a variable window period, if the pulse transmission ratios of the first infrared sensor pair 11 and the second infrared sensor pair 12 both exceed the first set threshold, enter the possible seated state and start timing.

[0098] Using signal frequency analysis combined with wavelet transform, the interference source of periodic motion transformation can be accurately found, thereby avoiding being disturbed.

[0099] In some embodiments, a work / learning and rest process function can also be set, specifically, as shown in FIG. 5, the controller is configured to also perform the following steps:

[0100] Accumulate the duration of continuous seated state and possible unseated state as work / learning duration, if the work / learning duration exceeds a fourth set duration, issue a light prompt for reminding rest, and enter a forced rest state. In the present embodiment, the fourth set duration is 40 minutes, of course, in other embodiments, other designs can also be adopted;

[0101] When in the forced rest state, the light is dimmed and the seated state is suspended.

[0102] After the fifth set duration, the forced rest state ends and the seated state is resumed. In the present embodiment, the fifth set duration is 5 minutes, of course, in other embodiments, other designs can also be adopted

[0103] After the seated state is resumed, when a person is detected to be seated, the work / learning duration accumulation of the next stage is restarted.

[0104] The controller is configured to further perform the following steps:

[0105] If the person is detected to leave during the accumulation phase of the work / study duration, the time accumulation is paused.

[0106] The time accumulation is resumed after the person is detected to re-seat; or if the person is not detected to return after a fifth set duration, the accumulation of the work / study duration is ended.

[0107] The controller is configured to further perform the following steps:

[0108] The accumulation of the work / study duration is manually stopped or restarted at any time.

[0109] In the prior art, some other smart table lamps have a function of learning for a number of times and resting for a number of times. However, the function is simply automatically cycled according to time. The table lamp of the present application provides a self-adaptive rest reminding function on the premise of accurately judging whether a person is seated in front of the table lamp. After 40 minutes of continuous work, a rest reminder is given, and the light is dimmed for 5 minutes. The reason why it is called self-adaptive is that the 40 minutes of work and the 5 minutes of rest are not fixedly run according to time, but are adjusted according to the user's behavior. For example, after 10 minutes of work, if the user leaves for a short time and re-seats within 5 minutes, the time accumulation of the previous period will be continued. Otherwise, if the user leaves for more than 5 minutes, the next time the user re-seats, the 40 minutes of work counting will be restarted. The rest time is the same. The 5 minutes is only a suggestion, and the user can decide the rest duration by himself / herself, and the counting of the next period of 40 minutes of work will be restarted after re-seating.

[0110] The table lamp side stores all the activities of the table lamp user, and the daily and monthly data curves including the sitting posture, concentration, learning time, rest time, and video recording period can be viewed through the APP. The daily data curve is represented by a column chart. The horizontal coordinate represents time, with 15 minutes as the minimum unit, and the total length is 24 hours. The height of the column chart represents the average score of the sitting posture and concentration in 15 minutes. If it is displayed as a gap (height 0), it means that there is no one in front of the lamp or in a rest state during the period. Through the curve, the work / study profile of the table lamp user is clear at a glance.

[0111] In some embodiments, the desk lamp is provided with a learning mode, in which the desk lamp increases the sitting posture reminder and attention statistics function. The head position is judged by using two groups of transceiver pairs or logic at the lampshade (corresponding to the head position). Only when both groups of transceiver pairs cannot detect the head for a certain period of time, it is judged that the head is too low, and a voice reminder is given. The distance between the two groups of infrared transceiver pairs is about 12 cm, which is approximately equal to the width of the human head, so the horizontal effective detection width of the user's head is about 3*12=36 cm, plus the certain emission angle of the infrared transmitter itself, the actual horizontal effective detection range is larger. Both can ensure the accurate judgment of the desk lamp on the sitting posture, and also give the user a lot of activity space.

[0112] In some embodiments, a schedule function can be provided, which can be set remotely through an APP, with a week as a cycle, to set the daily schedule, such as wake-up time, work / school time, lunch break time, work-off time, entertainment time, sleep reminder, etc., which can be set as needed. The schedule only triggers the voice reminder on the desk lamp side, and does not affect the actual state of the desk lamp side.

[0113] In some embodiments, the desk lamp can remotely view the running state of the desk lamp through the APP and set the running parameters, but in order to facilitate user use, the desk lamp side also has local display interaction function. The hardware on the desk lamp side includes touch buttons and a display screen (or a touch screen), and the displayed information includes three types of common screen, setting screen, and communication screen. The common screen includes a perpetual calendar (the desk lamp automatically connects to the server to set the time after power on, without manual setting), working mode / state, current class remaining time, daily work cumulative time, real-time evaluation of sitting posture and concentration, etc. important information; the setting screen includes common settings (including mode selection, color temperature / brightness / volume setting), sensor test, temporary alarm, WiFi setting; the communication screen includes communication method (audio / video call, intercom, message) and communication object (address book) selection.

[0114] In some embodiments, in view of the poor self-making ability of students, parents may not be satisfied with the display of the learning curve, and have the need to further master the learning state of the child. In the learning mode, the desk lamp provides a selectable learning period recording function (the desk lamp needs to be equipped with a camera 7). This function needs to be used in combination with the aforementioned schedule. Specifically, the desk lamp includes a camera 7, is currently in the learning period set by the schedule and has checked the learning period recording function, and the desk lamp side judges that there is a person (the above conditions are logically ANDed), the learning period automatic recording function will be performed.

[0115] This function takes into account privacy protection: first, the student can discuss the learning time period with the parents, this function can only be turned on during the learning period, and automatically turned off during the non-learning period; the recording area only includes the desktop area under the desk lamp; there is a clear recording indicator light during the recording period.

[0116] This function optimizes the recording content and playing function: only record the effective learning time video, people leave the seat, rest time, and the recording is in the pause recording state, to ensure that the recording is a complete learning process; Because the recording video is often long (may be up to several hours), it will take a long time to check the recording after using the traditional fast forward function, and consume a large amount of traffic (the traditional fast forward function requires that all data must be transmitted). When checking the recording video through the APP, in addition to the common function of pulling the progress bar, a unique browsing function can also be designed: this function provides a skip playback function, that is, every few seconds extracts a frame of image for playback. Such processing can enable the APP user to browse several hours of recording content in a few minutes, saving time and traffic.

[0117] The above functions, if realized in the form of a software function unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the present application or the part of the prior art that essentially contributes or the part of the technical solutions can be embodied in the form of a software product, which is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various program code storage media.

Claims

1. A sitting monitoring desk lamp, comprising: one or more pairs of first infrared sensors disposed on a lampshade of the desk lamp; one or more pairs of second infrared sensors disposed on a lamp column of the desk lamp; characterized in that further comprising: a motion sensor disposed on the desk lamp; a controller connected to the pairs of first infrared sensors, the pairs of second infrared sensors and the motion sensor respectively, configured to perform the following steps: obtaining signals of the pairs of first infrared sensors, and generating a pulse-transmit-receive ratio of the pairs of first infrared sensors, wherein the pulse-transmit-receive ratio of the infrared sensor pair is a ratio of the number of received infrared pulses to the number of emitted infrared pulses within a test period; obtaining signals of the pairs of second infrared sensors, and generating a pulse-transmit-receive ratio of the pairs of second infrared sensors; obtaining signals output by the motion sensor, and generating a motion determination signal when an object in a monitoring range produces motion; when in an unseated state, if the pulse-transmit-receive ratios of the pairs of first infrared sensors and the pairs of second infrared sensors both exceed a first set threshold, entering a possible seated state, and starting a timer; when in the possible seated state, if either of the pulse-transmit-receive ratios of the pairs of first infrared sensors and the pairs of second infrared sensors is less than the first set threshold, returning to the unseated state; when the time in the possible seated state exceeds a first set time length, entering a seated state; when in the seated state, if the pulse-transmit-receive ratios of the pairs of first infrared sensors and the pairs of second infrared sensors are both less than a second set threshold, or no motion determination signal is received within a continuous second set time length, entering a possible unseated state, and starting a timer; when in the possible unseated state, if either of the pulse-transmit-receive ratios of the pairs of first infrared sensors and the pairs of second infrared sensors is greater than the second set threshold, and a motion determination signal is received, returning to the seated state; when the time in the possible unseated state exceeds a third set time length, entering the unseated state.

2. A seat monitoring desk lamp according to claim 1, characterized in that The second set threshold is less than the first set threshold.

3. The seat monitoring desk lamp of claim 1, wherein, The test periods of all pairs of infrared sensors are staggered, and each test period is composed of multiple minimum evaluation periods.

4. The seat monitoring desk lamp of claim 1, wherein, The motion sensor is a pyroelectric sensor.

5. The seat monitoring desk lamp of claim 1, wherein, The desk lamp further comprises a loudspeaker, and the controller is further configured to perform the following steps: when entering the possible unseated state due to no motion determination signal being received within a continuous second set time length, issuing a voice or light prompt message.

6. The seat monitoring desk lamp of claim 1, wherein, The when in the unseated state, if the pulse-transmit-receive ratios of the pairs of first infrared sensors and the pairs of second infrared sensors both exceed the first set threshold, entering the possible seated state, and starting the timer, comprises: when in the unseated state, if a motion determination signal is received, controlling the pairs of first infrared sensors and the pairs of second infrared sensors to start working; after delaying for a time period of a variable window, if the pulse-transmit-receive ratios of the pairs of first infrared sensors and the pairs of second infrared sensors both exceed the first set threshold, entering the possible seated state, and starting the timer.

7. The seat monitoring desk lamp of claim 1, wherein, The controller is further configured to perform the following steps: The time length of the accumulated continuous seated state and possible unseated state is taken as the work / study time length, if the work / study time length exceeds the fourth set time length, a light prompt for reminding rest is sent out, and a forced rest state is entered; When in the forced rest state, the light is dimmed, and the seated state is suspended. After the fifth set time length is passed, the forced rest state ends, and the seated state is resumed. After the seated state is resumed, when it is detected that someone is seated, the work / study time length accumulation of the next stage is restarted.

8. The seat monitoring desk lamp of claim 1, wherein, The controller is configured to further perform the following steps: During the accumulation stage of the work / study time length, if it is detected that the person leaves, the time accumulation is suspended. The time accumulation is continued after the person is detected to be seated again; or after the fifth set time length is passed, the person is still not detected to return, and the accumulation of the work / study time length of this round is ended.

9. A seat monitoring desk lamp according to claims 7 and 8, characterized in that The controller is configured to further perform the following steps: At any time, a manual trigger is accepted, and the accumulation of the work / study time length is closed or restarted.

10. A seat occupancy monitoring method characterized by, It comprises: Signals of the first infrared sensor pair are acquired, and a pulse transmission ratio of the first infrared sensor pair is generated, wherein the pulse transmission ratio of the infrared sensor pair is a ratio of the number of received infrared pulses to the number of emitted infrared pulses within a test period; Signals of the second infrared sensor pair are acquired, and a pulse transmission ratio of the second infrared sensor pair is generated; Signals output by the motion sensor are acquired, and a motion determination signal is generated when an object in the monitoring range produces motion; When in the unseated state, if the pulse transmission ratios of the first infrared sensor pair and the second infrared sensor pair both exceed a first set threshold, a possible seated state is entered, and timing is started; When in the possible seated state, if either of the pulse transmission ratios of the first infrared sensor pair and the second infrared sensor pair is less than the first set threshold, the unseated state is returned to; When the time in the possible seated state exceeds a first set time length, a seated state is entered; When in the seated state, if the pulse transmission ratios of the first infrared sensor pair and the second infrared sensor pair are both lower than a second set threshold, or no motion determination signal is received within a continuous second set time length, a possible unseated state is entered, and timing is started; When in the possible unseated state, if either of the pulse transmission ratios of the first infrared sensor pair and the second infrared sensor pair is greater than the second set threshold, and a motion determination signal is received, the seated state is returned to; When the time in the possible unseated state exceeds a third set time length, the unseated state is entered.

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