JP6501067B2 - Abnormality judgment device - Google Patents

Description

  The present invention relates to an abnormality determination device that determines the presence or absence of breathing abnormality of an occupant seated on a seat of a vehicle.

  Conventionally, various techniques have been proposed for detecting a vital sign of an occupant sitting on a seat of a vehicle and performing an emergency notification or the like when a vital abnormality of the occupant is found. As a method of detecting a vital sign of a passenger, for example, a technology for detecting respiration as vital sign of a passenger by a Doppler radar incorporated in a seat belt (seat belt), a pressure sensor or the like has been proposed (for example, patent See documents 1 and 2).

JP-A-2010-540016 JP, 2004-290324, A

  However, when it is intended to detect respiration with a Doppler radar incorporated in a seat belt as described in Patent Document 1, there is a risk that the seat belt attachment performance (operability) may be impaired because the Doppler radar touches the occupant. Furthermore, there is a problem that the device becomes complicated.

  Further, as described in Patent Document 2, when the respiration is detected by the pressure sensor provided on the fixing buckle, there is a possibility that the respiration state as the vital sign of the occupant can not be appropriately determined. Generally, the larger the physique, the deeper (larger) the respiration is and the smaller the number of respirations per unit time tends to be. However, the technique described in Patent Document 2 does not take into account the body difference of the occupants. There is a possibility that the breathing state of the occupant can not be accurately determined.

  The present invention has been made in view of such circumstances, and it is an object of the present invention to provide an abnormality determination device capable of more accurately determining the breathing state of an occupant, that is, the presence or absence of breathing abnormality.

A first aspect of the present invention for solving the above-described problems is an abnormality determination device that determines the presence or absence of an abnormality of an occupant seated on a seat of a vehicle, and calculates the amount of extraction for calculating the amount of extraction of a belt member of a seat belt device. Body rank, which determines which of a plurality of physical ranks of the occupant belong in advance, on the basis of the part and the pulling-out amount of the belt member in a state where the occupant wears the belt member A determination unit; and a reference value setting unit configured to set a reference value of the amount of fluctuation of the withdrawal amount of the belt member according to the physique rank determined by the physique rank determination unit;
An abnormality determination device comprising: an abnormality determination unit that determines presence or absence of the breathing abnormality of the occupant based on a magnitude relationship between a variation amount of the withdrawal amount of the belt member and the reference value.

  According to a second aspect of the present invention, in the abnormality determination device according to the first aspect, the reference value setting unit sets the normal region of the fluctuation amount to the reference based on the physical rank determined by the physical rank determination unit. The abnormality determination unit is set as a value, and the abnormality determination unit determines that there is a breathing abnormality of the occupant on the condition that the variation amount is out of the normal region.

  According to a third aspect of the present invention, in the abnormality determination device according to the first or second aspect, the body mass rank determination unit determines that the center of variation in the amount of withdrawal is in a state where the occupant wears the belt member. The abnormality determination device is characterized in that the determination of the physical rank is performed when the determination is exceeded.

  A fourth aspect of the present invention is the abnormality determination device according to any one of the first to third aspects, further comprising: a seat position detection unit that detects the position of the seat in the front-rear direction of the vehicle; The rank determination unit is included in the abnormality determination apparatus, which corrects a physical determination threshold which is a determination reference of the physical rank on the basis of a detection result of the sheet position detection unit.

  A fifth aspect of the present invention is the abnormality determination device according to any one of the first to fourth aspects, wherein the reference value setting unit increases the reference amount as the lead amount calculated by the lead amount calculation unit increases. There is an abnormality determination device characterized in that the value is set to a large value.

  According to the abnormality determination device of the present invention, the presence or absence of a breathing abnormality of the occupant can be determined more accurately with a relatively simple configuration.

It is the schematic which shows the structure of the abnormality determination apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the drawing amount of a belt member. It is a figure which shows an example of a leveling calculation value, and demonstrates the determination method of the physical rank based on a leveling calculation value. It is a figure which shows an example of the graph (waveform) of a leveling calculation value (respiratory component). It is a figure explaining the determination method of the breathing abnormality based on a leveling calculation value (respiratory component). It is a flowchart which shows the abnormality determination method which concerns on Embodiment 1 of this invention. It is the schematic which shows the structure of the abnormality determination apparatus which concerns on Embodiment 2 of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
FIG. 1 is a diagram showing a schematic configuration of an abnormality determination device according to Embodiment 1 of the present invention.
As shown in FIG. 1, the vehicle is provided with an emergency notification device 1 for giving an emergency notification when an abnormality (respiratory abnormality) occurs in the occupant 100, and the abnormality determination device 10 according to the present invention is such an emergency notification device. Make up a part of 1.

  The abnormality determination device 10 determines the breathing abnormality of the occupant based on the information from the seat belt device 30 mounted on the seat 20 of the vehicle. When it is determined by the abnormality determination device 10 that there is a breathing abnormality of the occupant, the determination information is sent to the communication unit 2 of the emergency notification device 1 and transmitted from this communication unit 2 to a service center etc. outside the vehicle. There is.

  The present invention is characterized by such an abnormality determination device 10. Hereinafter, although the abnormality determination device 10 will be described in detail, first, the configuration of the seat belt device 30 will be briefly described.

  The seat belt device 30 includes a belt member (webbing) 31 that restrains the occupant 100 seated on the seat 20 from the front, a tongue member 32 attached to the belt member 31, and a buckle member to which the tongue member 32 is inserted and fixed. And 33. One end side of the belt member 31 is fixed to the vehicle body at the side portion of the seat 20, and the other end is connected to the retractor 35 via a shoulder anchor 34. The retractor 35 includes a rotatably supported spool (not shown), and is configured to be able to wind the belt member 31 on the spool. Further, the retractor 35 is provided with a position detection sensor 36 which constantly detects the rotational position (rotational angle) of the spool as the position of the belt member 31.

Then, the abnormality determination device 10 according to the first embodiment determines the breathing state of the occupant 100 sitting on the seat 20 (e.g., breathing) based on the amount of withdrawal of the belt member 31 constituting the seat belt device 30 as described above. The depth (size), the interval of breathing, and the like are detected, and the presence or absence of abnormal breathing of the occupant 100 is determined according to the detected respiratory state.
Specifically, the abnormality determination device 10 includes a withdrawal amount calculation unit 11, a physical rank determination unit 12, a reference value setting unit 13, and an abnormality determination unit 14.

  The pulling amount computing unit 11 buckles the tongue member 32 by seating the occupant 100 from the non-use state of the belt member 31 based on the position information (angle information θ) detected by the position detection sensor 36 provided in the retractor 35 The amount of withdrawal in the state of being inserted into the member 33 is determined by sequential calculation (see FIGS. 2A and 2B). Further, the withdrawal amount calculation unit 11 extracts, from the calculated value, information (amplitude due to the lower limit value P1 and the upper limit value P2 of the withdrawal amount) of only slight expansion and contraction due to the breathing of the occupant 100 or the like. Specifically, the withdrawal amount computing unit 11 performs equalization processing on the withdrawal amount (computed value) of the belt member 31 computed from the position information detected by the position detection sensor 36, and uses the lower limit value P1 of the computed value as a reference Only data of a predetermined range (amplitude amount P1-P2 of the amount of withdrawal) is extracted (see FIGS. 2 (c) and 2 (d)).

  In the example shown in FIG. 2A, in the period from time t1 to time t2, the amount of withdrawal is larger than the upper limit value P2 set in advance, so data of this period t1-t2 is obtained by the leveling process. Are excluded (see FIG. 2 (c)). Further, in the example shown in FIG. 2B, since the amount of withdrawal is larger than the upper limit value P2 set in advance in the period from time t3 to time t4, the leveling process is performed during the period t3-t4. Data is excluded (see FIG. 2 (d)).

  That is, the operation value thus leveled (hereinafter referred to as "leveling operation value") is normally used (for example, operation of an interior item, movement of occupant 100 in the forward direction by sudden braking, etc.) This is data in which expansion and contraction of the belt member 31 due to a temporary change in posture etc.) is excluded. In other words, the leveling calculation value is attached to the tongue member 32, and the belt member 31 is in contact with the chest of the occupant 100. A slight expansion and contraction due to breathing or the like of the occupant 100 (variation amount of withdrawal amount) It becomes the data which extracted only.

  The physical rank determining unit 12 determines that the physical size of the occupant 100 belongs to any of a plurality of physical ranks set in advance based on the amount of withdrawal (leveling calculation value) in a state where the occupant 100 wears the belt member 31. Determine if In the present embodiment, at least two ranks of “adult” and “child” are set in advance as physical ranks, and the physical rank determination unit 12 determines whether the occupant 100 is “adult” based on the leveling calculation value. Determine if it is a "child". The physical rank does not have to be two ranks, and may be set to three or more ranks.

  As a determination method, specifically, whether the body mass rank of the occupant 100 is “adult” or “children” depending on, for example, whether or not the leveling calculation value is equal to or more than the body type determination threshold indicated by the one-dot chain line in FIG. "Is determined. The physique determination threshold is set in advance based on, for example, an experimental value. Then, for example, as indicated by a solid line in FIG. 3, when the leveling calculation value is equal to or greater than the physical determination threshold, the physical rank determining unit 12 determines that the physical rank of the occupant 100 is “adult”. Further, as indicated by a dotted line in FIG. 3, when the leveling calculation value is smaller than the physique determination threshold, the physique rank determination unit 12 determines that the physique rank of the occupant 100 is “child”.

  As described above, when the physique rank is determined by the physique rank determination unit 12, the extraction amount calculation unit 11 further filters the leveling calculation value based on the determination result. When it is determined by the physical rank judging unit 12 that the physical rank of the occupant 100 is “adult”, the withdrawal amount calculating unit 11 performs “filter processing for adult occupants” on the leveling calculation value. Perform amplification processing. On the other hand, when it is determined by the physique rank determination unit 12 that the physique rank of the occupant 100 is "child", "a filter process for a child occupant" is performed and an amplification process is performed. Thereby, respiratory information is decomposed (extracted) from the leveling calculation value, and a graph (waveform) of the leveling calculation value (respiratory component) is formed, for example, as shown in FIG. 4A shows an example of the leveling calculation value (respiratory component) when the physical rank of the occupant 100 is "adult", and FIG. 4B shows that the physical rank of the occupant 100 is "child". It is an example of the leveling calculation value (respiratory component) in a certain case.

Here, the number of respirations per unit time is generally considered to be greater in "children" than in "adults." In addition, the depth of breathing (the amount of fluctuation of the withdrawal amount of the belt member due to breathing) is considered to be larger in "adult" than in "child". The above-mentioned “filter processing for adult occupants” and “filter processing for child occupants” are filter processing taking these points into consideration. A more accurate vital sign (respiration graph) can be obtained by appropriately changing the applied filter processing depending on whether the physical constitution is "adult" or "child" as described above.
Note that “filter processing for adult occupants” and “filter processing for child occupants” and amplification processing may be performed as necessary, and may not necessarily be performed.

  The reference value setting unit 13 sets a reference value of the fluctuation amount of the withdrawal amount (leveling calculation value) of the belt member 31 in accordance with the physical rank of the occupant 100 determined by the physical rank determination unit 12. In the present embodiment, the reference value setting unit 13 sets a normal region of the maximum value of the leveling calculation value (respiratory component) as a reference value.

  Specifically, the reference value setting unit 13 sets a predetermined range according to whether the physical rank of the occupant is "adult" or "child" as a normal region of the maximum value of the leveling calculation value (respiratory component) Set as appropriate. Generally, the larger the physical size of the occupant 100, the larger the maximum value of the leveling calculation value (respiratory component) tends to be. Therefore, for example, as shown in FIG. 5, the normal region N1 of the maximum value of the leveling operation value (respiratory component) whose physical rank is "adult" is the leveling operation value whose physical rank is "child" ( It is set to a value larger than the normal region N2 of the respiratory component).

  The reference values (normal regions N1 and N2) set by the reference value setting unit 13 may be fixed for each physical rank, but may be varied within each physical rank. That is, the reference value setting unit 13 may set the normal areas N1 and N2 as the reference value to larger values as the amount of withdrawal of the belt member 31 (leveling calculation value) is larger.

  The abnormality determination unit 14 compares the normal areas N1 and N2 set by the reference value setting unit 13 with the fluctuation amount (the leveling calculation value (respiratory component)) of the withdrawal amount of the belt member 31 (for example, the amplitude amount). The presence or absence of a breathing abnormality of the occupant 100 is determined on the basis of (period). For example, when the physical rank of the occupant 100 is "adult", as shown in FIG. 4A, if the maximum value (amplitude amount) of the leveling calculation value (respiratory component) is within the normal region N1, the abnormality is The determination unit 14 determines that the breathing state of the occupant 100 is normal (no abnormal breathing). On the other hand, as shown in FIG. 5A, when the state lower (or higher) than the normal region N1 continues for a certain period or longer, the abnormality determination unit 14 determines that the respiratory state is abnormal (respiratory abnormality is present). judge.

Similarly, when the physical rank of the occupant 100 is "child", as shown in FIG. 4B, if the maximum value of the leveling calculation value (respiratory component) is within the normal region N2, the occupant 100 breathes. It is determined that the state is normal (no abnormality). On the other hand, as shown in FIG. 5 (b), when the maximum value of the leveling calculation value (respiratory component) is lower (or higher) than the normal region N2 for a predetermined period or more, the abnormality determination is made. The unit 14 determines that the breathing state of the occupant 100 is abnormal (respiratory abnormality is present).
Then, when the abnormality determination unit 14 determines that there is a breathing abnormality, the determination result is sent to the communication unit 2, and an emergency notification is performed from the communication unit 2 to a service center or the like outside the vehicle.

  As described above, in the abnormality determination apparatus 10 according to the present embodiment, the belt member 31 itself does not have a sensor or the like for detecting the respiration of the occupant 100, and the occupant is detected by the position detection sensor 36 provided in the retractor 35. It detects 100 breathing states. Therefore, it is possible to determine the breathing abnormality of the occupant 100 without impairing the mounting property of the belt member 31. Further, since the reference value (normal region) serving as the determination standard of the respiratory abnormality is appropriately set according to the physical rank of the occupant 100, the respiratory abnormality of the occupant 100 can be determined more accurately.

Hereinafter, the abnormality determination procedure according to the present embodiment will be further described with reference to the flowchart of FIG.
As shown in FIG. 6, the occupant 100 is seated on the seat 20, the belt member 31 of the seat belt device 30 is mounted on the tongue member 32, and the tongue member 32 is in contact with the chest of the occupant 100; The position information of the retractor (spool) 35 detected by the position detection sensor 36 is acquired. Next, in step S2, the amount of withdrawal of the belt member 31 is calculated from the acquired position information. Next, in step S3, the drawing amount (calculated value) obtained by the calculation is leveled. Next, based on the leveled calculation value (leveling calculation value), it is determined whether the physical rank of the occupant 100 belongs to "adult" or "child" (step S4).

  Here, if the physical rank of the occupant 100 belongs to "adult" (step S4: Yes), the process proceeds to step S5, performs filtering processing for the adult occupant on the leveling calculation value, and performs amplification processing. Extract respiratory component information. Next, in step S6, a reference value (normal region N1) of the maximum value of the leveling calculation value (respiratory component) corresponding to the physical rank "adult" is set (see FIG. 4). Next, based on the magnitude relationship between the maximum value of the leveling calculation value (respiratory component) and the normal region N1, it is determined whether or not there is a breathing abnormality of the occupant 100 (step S7).

  For example, when it is determined that the state where the maximum value of the leveling calculation value (respiratory component) deviates from the normal region N1 continues for a fixed period or more and there is an abnormality in the breathing of the occupant 100 (step S7: Yes), Are transmitted to the communication unit 2 (step S8). When it is determined that there is no abnormality in the breathing of the occupant 100 (step S7: No), the process returns to step S1 without transmitting information to the communication unit 2. When the communication unit 2 receives the information on the respiratory abnormality, the communication unit 2 executes an emergency call to a service center or the like outside the vehicle.

  On the other hand, if the physical rank of the occupant 100 belongs to "child" in step S4 (step S4: No), the process proceeds to step S9, and filtering processing for the child occupant is performed on the leveling calculation value and amplification processing is performed. To extract respiratory component information. Next, in step S10, a reference value (normal region N2) of the maximum value of the leveling calculation value (respiratory component) corresponding to the physical rank "child" is set (see FIG. 4). Thereafter, the process proceeds to step S7, and the presence or absence of breathing abnormality of the occupant 100 is determined based on the magnitude relationship between the maximum value of the leveling calculation values (respiratory components) and the normal region N2.

  As described above, according to the abnormality determination device 10 according to the present embodiment, the presence or absence of a breathing abnormality of the occupant can be determined more accurately without impairing the operability of the seat belt device.

Second Embodiment
FIG. 7 is a diagram showing a schematic configuration of the abnormality determination device according to the second embodiment.
As shown in FIG. 7, the abnormality determination device 10A according to the second embodiment has the same configuration as that of the first embodiment except that the sheet position detection unit 15 is further provided.

  The seat position detection unit 15 detects the slide position of the seat 20 in the front-rear direction of the vehicle. In the present embodiment, a position sensor 21 for detecting the position of the seat 20 on the slide rail is provided, and the seat position detection unit 15 acquires positional information of the seat 20 detected by the position sensor 21. Then, the sheet position detection unit 15 detects the movement of the sheet 20 based on the position information detected by the position sensor 21.

  The physique rank determination unit 12 determines the physique rank of the occupant 100 based on whether the leveling calculation value is equal to or more than the physique determination threshold as described above. In the present embodiment, at that time, when the sheet position detection unit 15 detects that the sheet 20 has moved, the physical rank determination unit 12 appropriately corrects the physical determination threshold according to the movement amount of the sheet 20.

  For example, since the seat belt device 30 itself is fixed to the vehicle body, when the seat 20 moves to the front side of the vehicle, the belt member of the seat belt device 30 even if the same occupant is seated on the seat 20 The withdrawal amount of 31 increases. Therefore, the physical rank determining unit 12 corrects the physical determination threshold to a larger value. On the other hand, when the seat 20 moves to the rear side of the vehicle, the amount of withdrawal of the belt member 31 of the seat belt device 30 decreases even if the same occupant is seated on the seat 20. Therefore, the physical rank determining unit 12 corrects the physical determination threshold to a smaller value.

  As described above, by appropriately correcting the physique determination threshold according to the position (movement) of the seat 20, the physique rank of the occupant 100 can be determined more appropriately, and consequently, the breathing abnormality of the occupant 100 is more accurately determined. be able to.

  In addition, for example, when the seat position detection unit 15 detects that the seat 20 has been moved after the determination of the physical rank of the occupant 100 ends at least once (the physical rank is set), the physical rank determination unit 12 It is preferable to execute again the determination of the physical rank of the occupant 100 according to the above. In particular, the withdrawal amount of the belt member 31 (in the present embodiment, the amplitude center of the withdrawal amount (the lower limit value P1 of the withdrawal amount in accordance with the movement of the seat 20 or the inclination change of the seatback) in a state where the breathing of the occupant 100 is not abnormal. If the upper limit P2)) fluctuates (increases or decreases) by more than a predetermined amount as compared to the amount of withdrawal until that time (in this embodiment, the amplitude center of the amount of withdrawal), the body rank It is preferable to make a re-determination of Of course, even when the sheet 20 is not moved, it is preferable to re-determine the physical rank when a significant change occurs in the amount of withdrawal of the belt member 31. Thus, the rank of the occupant 100 can be determined more accurately.

As mentioned above, although embodiment of this invention was described, this invention is not of course limited to the above-mentioned embodiment.
For example, although the above-mentioned embodiment explained the example which determined the existence of breathing abnormality based on the depth (size) of a passenger's breath, for example, the breathing abnormality is based on the interval of breathing together with the depth of breathing. The presence or absence of may be determined.

DESCRIPTION OF SYMBOLS 1 emergency call apparatus 2 communication part 10 abnormality determination apparatus 11 extraction amount calculation part 12 physical rank determination part 13 reference value setting part 14 abnormality determination part 15 sheet position detection part 20 sheet 21 position sensor 30 seat belt apparatus 31 belt member 32 tongue member 33 buckle member 34 shoulder anchor 35 retractor 36 position detection sensor 100 occupant

Claims (5)

An abnormality determination apparatus that determines the presence or absence of an abnormality of an occupant seated on a seat of a vehicle,
A withdrawal amount computing unit that computes the withdrawal amount of the belt member of the seat belt device;
A physique rank determination unit that determines to which of a plurality of physique ranks that the occupant's physique belongs in advance, based on the amount of withdrawal of the belt member in a state where the occupant wears the belt member; ,
A reference value setting unit configured to set a reference value of the amount of fluctuation of the withdrawal amount of the belt member according to the physical rank determined by the physical rank determining unit;
An abnormality determination device, comprising: an abnormality determination unit that determines presence or absence of the breathing abnormality of the occupant based on a magnitude relationship between a variation amount of the withdrawal amount of the belt member and the reference value. In the abnormality determination device according to claim 1,
The reference value setting unit sets a normal region of the fluctuation amount as the reference value based on the physical rank determined by the physical rank determining unit.
The abnormality determination device is characterized in that the abnormality determination unit determines that there is a breathing abnormality of the occupant on condition that the variation amount is out of the normal region. In the abnormality determination device according to claim 1 or 2,
The physical rank judging unit is characterized in that the physical rank is rejudged when the center of fluctuation of the withdrawal amount exceeds a predetermined amount in a state where the occupant wears the belt member. Abnormality determination device. The abnormality determination apparatus according to any one of claims 1 to 3.
It further comprises a seat position detection unit for detecting the position of the seat in the front-rear direction of the vehicle,
The abnormality determination device, wherein the physique rank determination unit corrects a physique determination threshold, which is a determination standard of the physique rank, based on a detection result of the seat position detection unit. In the abnormality determination device according to any one of claims 1 to 4,
The reference value setting unit sets the reference value to a larger value as the lead-out amount calculated by the lead-out amount calculation unit is larger.