CN113567168A - Test equipment and method for measuring interval interference degree of partitioned mattress - Google Patents
Test equipment and method for measuring interval interference degree of partitioned mattress Download PDFInfo
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- CN113567168A CN113567168A CN202110988542.4A CN202110988542A CN113567168A CN 113567168 A CN113567168 A CN 113567168A CN 202110988542 A CN202110988542 A CN 202110988542A CN 113567168 A CN113567168 A CN 113567168A
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- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/001—Testing of furniture, e.g. seats or mattresses
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Abstract
The invention relates to a test device and a test method for measuring the section interference degree of a partitioned mattress, wherein the test device comprises a base, a support, a pressure displacement double sensor and a laser displacement distance measuring sensor, the support is arranged on the base in a sliding mode and comprises an upright post, a first transverse plate and a second transverse plate, the pressure displacement double sensor is arranged on the first transverse plate in a sliding mode, a plurality of laser displacement distance measuring sensors are arranged on the second transverse plate in a sliding mode, and the laser displacement distance measuring sensors penetrate through the first transverse plate to carry out deformation displacement detection on a mattress to be tested on the base. The invention discloses a test device for measuring the interference degree between subarea mattresses, which is used for collecting corresponding data of the mattresses and then testing the interference degree between subarea mattresses by using the collected data.
Description
Technical Field
The invention relates to the technical field of mattress interference degree testing, in particular to a testing device and a method for measuring the interference degree between partitioned mattress intervals.
Background
The mattress on the existing market is various in types and different in performance, and comprises a palm mattress, a latex mattress, a partition mattress, a common bagged spring mattress and the like. Such mattresses are divided into two categories in the existing market: firstly, the mattress is divided into two areas, which is characterized in that the turning-over of the couple during sleep is not affected; the other is a longitudinal partitioned mattress which is mainly designed into a spine-friendly mattress, elastic materials with different hardness are configured according to the human body weight when the human body is in a prone position according to the theory of human ergonomics, the spine of the human body is kept in a natural extension state by arranging partitions with different hardness, and the longitudinal partitioned mattress is mainly designed into three partitions of shoulders, hips and legs, five partitions of heads, shoulders, waists, hips, legs and the like, so that all parts of the human body are fully relaxed, the static force application of muscles is reduced, and the lateral bending of the spine is avoided.
In an entity store or an e-commerce platform, the partition mattresses which are declared to be in line with human ergonomics are more and more, but a merchant can only introduce the idea of a new mattress, and no corresponding partition mattress anti-interference test method or standard exists at home and abroad, so that the merchant can only express the partition anti-interference capability of a product through entity demonstration, and can not provide a standardized test result which is consistent with human experience for consumers. But the research on the regional mattress interval interference in China is almost not available.
At present, the academic and application circles mainly test the hardness of the mattress according to the research method and the result of the comfort of the mattress. These methods are based on the fact that the material inside the mattress is uniformly distributed, i.e. the mattress can form a circular spreading depressed curved surface after being pressed down. However, in the present application, the mattress is divided into zones, and the diffusion subsidence surface formed by pressing down is not uniform, for example, in practice, when the left side of the mattress is pressed down, the subsidence wave is formed mainly in the left zone, and the cliff-shaped rise is formed at the boundary line of the zones, and the right subsidence is not obvious. The traditional test method for the mutual interference resistance condition is difficult to evaluate.
Disclosure of Invention
In order to solve the technical problems, a first object of the present invention is to provide a testing device for measuring the interference degree between partitioned mattresses, and a second object of the present invention is to provide a testing method and an evaluation method for measuring the interference degree between double partitioned mattresses; the third purpose of the invention is to provide a test method and an evaluation method for measuring the interference degree between multi-partition mattress sections.
In order to achieve the first purpose of the invention, the invention adopts the following technical scheme:
the utility model provides a test equipment for weighing interval interference degree of subregion mattress, includes base, support, pressure displacement dual sensor and laser displacement range sensor, be equipped with first guide rail on the base, the support slides and sets up on first guide rail, the support includes stand, first diaphragm and second diaphragm, the upper portion at the stand is fixed to first diaphragm and the parallel interval of second diaphragm, be equipped with first guiding hole in the first diaphragm, pressure displacement dual sensor slides and sets up in first guiding hole, be equipped with the second guiding hole on the second diaphragm, and first guiding hole and second guiding hole are located same vertical plane, and a plurality of laser displacement range sensor slide and set up in the second guiding hole, and laser displacement range sensor passes first guiding hole and carries out the deformation displacement detection to the mattress that awaits measuring that is located on the base.
As a preferable scheme: the pressure displacement double-sensor and the laser displacement distance measuring sensor are arranged in the first guide hole and the second guide hole respectively through the sliding blocks and are driven through the first driving device respectively, the first driving device comprises a rack arranged on one side of the first guide hole or the second guide hole and a first driving motor fixed with the sliding blocks, a gear is arranged on an output shaft of the first driving motor, and the gear and the rack are matched to drive the sliding blocks to move so as to drive the pressure displacement double-sensor or the laser displacement distance measuring sensor to slide.
As a preferable scheme: the double pressure-displacement sensors are arranged on the sliding block through a screw rod lifter, the screw rod lifter comprises a transmission box and a screw rod, the transmission box is fixed with the sliding block, the screw rod penetrates through the transmission box, and the double pressure-displacement sensors are fixed on the lower portion of the screw rod.
As a preferable scheme: the upright post is also driven by the first driving device on the first guide rail, and an electric control box for controlling the first driving device and the screw rod lifter is further arranged on the upright post.
As a preferable scheme: the base is further provided with two clamping and positioning devices, one clamping and positioning device is arranged on the first rail in a sliding mode, the other clamping and positioning device is fixed on the side edge, perpendicular to the first rail, of the base, and the two clamping and positioning devices are located on two sides of the support respectively.
As a preferable scheme: the clamping and positioning device comprises a supporting rod and a pressing plate, the bottom of the supporting rod is arranged on the first guide rail in a sliding mode, a guide groove is further formed in the supporting rod, one end of the pressing plate is arranged in the guide groove in a sliding mode, and tension springs are arranged at the bottoms of the pressing plate and the supporting rod, wherein the bottoms of the pressing plate and the supporting rod are located in the guide groove.
As a preferable scheme: the laser displacement distance measuring sensor is fixed on the sliding block through the mounting rod.
In order to achieve the second purpose of the invention, the invention adopts the following technical scheme:
a test method and an evaluation method for measuring the interference degree between two partition mattress sections adopt the test equipment and are carried out according to the following steps:
the first step is as follows: fixing the mattress on the testing equipment, and adjusting the position of the pressure displacement double sensors according to the size of the mattress: aligning the pressure displacement double sensors to a point A of the mattress, and aligning the laser displacement distance measuring sensors to a point B of the mattress;
the second step is that: starting the test equipment, loading the pressure displacement dual sensor to 1000N at the speed of 90 +/-5 mm/min, and recording a sag deflection curve in the loading process of A, B points;
the third step: the method for calculating the interference degree between the mattress sections comprises the following steps:
1) and taking K measured sampling points to perform mean variance normalization processing on the deflection curve of the point B measured by the continuous force application of the point A according to the following formula (1):
wherein ,
xi: the sag depth of the ith frame;
μ: the sinking depth mean value of K sampling points;
σ2: sag depth variance of K sample points;
6) integrating the curve after the normalization processing, calculating the envelope area of the curve, and calculating according to the formula (2):
wherein ,
7) and expressing the envelope area as sag deflection, and calculating a final interference degree evaluation coefficient by the following formula (3):
when I is in the (0, 0.1) interval, the deflection interference coefficient between the expression subareas is in a good level, namely the interference degree is slight, and the mattress can obtain better subarea comfort degree.
As a preferable scheme: the mattress lateral centerline is a mattress partition line (61), point a on the mattress is the mattress longitudinal centerline from the one side edge 1/4 position, and point a on the mattress is the mattress longitudinal centerline from the other side edge 3/8 position.
In order to achieve the third object of the invention, the invention adopts the following technical scheme:
a test method and an evaluation method for measuring the interference degree between multi-partition mattresses are provided, the test equipment is adopted, and the test method comprises the following steps:
the first step is as follows: fixing a mattress (6) on a test device, carrying out physical and logical partitioning on the mattress, setting the physical and logical partitioning as K, and measuring the coordinate (x) of the center point of each partition1,y1)、(x2,y2)、(x3,y3)、…、(xn,yn) And measuring the distance S between points12、S13、S14、…；
The second step is that: at each point (x) in turni,yi) Applying a load of 20kg, measuring the vertical displacement DeltaL of each central point after stabilization1、△L2、△L3……△LnMeasuring in turn to obtain displacement data of each point;
k central point deflection interference coefficients are calculated in sequence, and the calculation steps of each central point deflection interference coefficient are as follows:
1) and taking K measured sampling points to perform mean variance normalization processing on the deflection curve of the point B measured by the continuous force application of the point A according to the following formula (1):
wherein ,
xi: the sag depth of the ith frame;
μ: the sinking depth mean value of K sampling points;
σ2: sag depth variance of K sample points;
8) integrating the curve after the normalization processing, calculating the envelope area of the curve, and calculating according to the formula (2):
wherein ,
9) and expressing the envelope area as sag deflection, and calculating a final interference degree evaluation coefficient by the following formula (3):
taking the position of the center point i as an example, a coefficient set can be obtained: i ═ I1，…，IK}；
The third step: and taking the standard deviation sigma of the set I, and when the sigma is in the (0, 0.1) interval, expressing that the deflection interference coefficient between the subareas is in a good level, namely the interference degree is slight, so that the mattress can obtain better subarea comfort level.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a test device for measuring the interference degree between subarea mattress sections, which is used for collecting corresponding data of a mattress and then testing the interference degree between subarea mattress sections by using the collected data. Namely whether one person turns over when the double person uses the mattress and influences each other, whether the single person uses the spine-friendly mattress can effectively support. With the value, consumers can compare and buy proper mattresses more rationally.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic diagram of the overall structure of the testing apparatus of the present invention;
FIG. 2 is a schematic view of a test dual zone mattress of the present invention;
fig. 3 is a schematic diagram of the testing of a multi-zone mattress of the present invention.
The labels in the figures are: 1. a base; 11. a first guide rail; 21. a column; 22. a first transverse plate; 23. a second transverse plate; 24. an electronic control box; 25. a first guide hole; 26. a second guide hole; 31. a pressure displacement dual sensor; 32. a transmission case; 33. a screw rod; 41. mounting a rod; 42. a laser displacement distance measuring sensor; 51. a support bar; 52. pressing a plate; 6. a mattress to be tested; 61. mattress partition lines.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, elements, and/or combinations thereof, unless the context clearly indicates otherwise.
Further, in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The invention will be further illustrated with reference to the following examples and drawings:
the test device for measuring the interference degree between the partitioned mattresses shown in fig. 1 comprises a base 1, a bracket, a pressure displacement dual sensor 31 and a laser displacement distance measuring sensor 42, the base 1 is provided with a first guide rail 11, the bracket is arranged on the first guide rail 11 in a sliding way, the bracket comprises a vertical column 21, a first transverse plate 22 and a second transverse plate 23, the first transverse plate 22 and the second transverse plate 23 are fixed on the upper part of the vertical column at intervals in parallel, the first transverse plate 22 is provided with a first guide hole 25, the pressure displacement double sensor 31 is arranged in the first guide hole 25 in a sliding manner, the second transverse plate 23 is provided with a second guide hole 26, and the first guide hole 25 and the second guide hole 26 are located on the same vertical plane, a plurality of laser displacement ranging sensors 42 are slidably disposed in the second guide hole 26, and the laser displacement distance measuring sensor 42 passes through the first guide hole 25 to detect the deformation displacement of the mattress 6 to be measured on the base 1.
The pressure displacement double sensor 31 and the laser displacement distance measuring sensor 42 are respectively arranged in the first guide hole 25 and the second guide hole 26 through sliding blocks and are respectively driven through a first driving device, the first driving device comprises a rack arranged on one side of the first guide hole 25 or the second guide hole 26 and a first driving motor fixed with the sliding blocks, a gear is arranged on an output shaft of the first driving motor, and the gear and the rack are matched to drive the sliding blocks to move so as to drive the pressure displacement double sensor 31 or the laser displacement distance measuring sensor 42 to slide.
The double pressure-displacement sensors 31 are arranged on the sliding block through a screw rod lifter, the screw rod lifter comprises a transmission box 32 and a screw rod 33, the transmission box 32 is fixed with the sliding block, the screw rod 33 penetrates through the transmission box 32, and the double pressure-displacement sensors 31 are fixed on the lower portion of the screw rod.
The upright post 21 is also driven by the first driving device on the first guide rail 11, and an electric control box 24 for controlling the first driving device and the screw rod lifter is further arranged on the upright post 21.
The base 1 is further provided with two clamping and positioning devices, one clamping and positioning device is arranged on the first rail in a sliding mode, the other clamping and positioning device is fixed on the side edge, perpendicular to the first rail, of the base, and the two clamping and positioning devices are located on two sides of the support respectively.
The clamping and positioning device comprises a supporting rod 51 and a pressing plate 52, the bottom of the supporting rod 51 is arranged on the first guide rail 11 in a sliding mode, a guide groove is further formed in the supporting rod 51, one end of the pressing plate 52 is arranged in the guide groove in a sliding mode, and the pressing plate 52 and the supporting rod 51 which are located in the guide groove are provided with tension springs at the bottom.
The laser displacement distance measuring sensor 42 is fixed on the slide block through a mounting rod 41.
As shown in fig. 2, a test method and an evaluation method for measuring the interference degree between two-partition mattress regions adopt the test equipment and are carried out according to the following steps:
the first step is as follows: the mattress 6 is fixed on the testing equipment, and the position of the pressure displacement dual sensor 31 is adjusted according to the size of the mattress: aligning the pressure displacement double sensor 31 to the point A of the mattress, and aligning the laser displacement distance measuring sensor 42 to the point B of the mattress;
the second step is that: starting the test equipment, loading the pressure displacement dual sensor 31 to 1000N at the speed of 90 +/-5 mm/min, and recording a sag deflection curve in the loading process of A, B points;
the third step: the method for calculating the interference degree between the mattress sections comprises the following steps:
1) and taking K measured sampling points to perform mean variance normalization processing on the deflection curve of the point B measured by the continuous force application of the point A according to the following formula (1):
wherein ,
xi: the sag depth of the ith frame;
μ: the sinking depth mean value of K sampling points;
σ2: sag depth variance of K sample points;
10) integrating the curve after the normalization processing, calculating the envelope area of the curve, and calculating according to the formula (2):
wherein ,
11) and expressing the envelope area as sag deflection, and calculating a final interference degree evaluation coefficient by the following formula (3):
when I is in the (0, 0.1) interval, the deflection interference coefficient between the expression subareas is in a good level, namely the interference degree is slight, and the mattress can obtain better subarea comfort degree.
Wherein: the mattress lateral centerline is a mattress partition line (61), point a on the mattress is the mattress longitudinal centerline from the one side edge 1/4 position, and point a on the mattress is the mattress longitudinal centerline from the other side edge 3/8 position.
As shown in FIG. 3, a test method and an evaluation method for measuring the interference degree between multi-partition mattresses, which adopt the test equipment, comprises the following steps:
the first step is as follows: fixing the mattress 6 on the test equipment, physically and logically partitioning the mattress, setting the partition as K, and measuring the coordinate (x) of the central point of each partition1,y1)、(x2,y2)、(x3,y3)、…、(xn,yn) And measuring the distance S between points12、S13、S14、…；
The second step is that: at each point (x) in turni,yi) Applying a load of 20kg, measuring the vertical displacement DeltaL of each central point after stabilization1、△L2、△L3……△LnMeasuring in turn to obtain displacement data of each point;
k central point deflection interference coefficients are calculated in sequence, and the calculation steps of each central point deflection interference coefficient are as follows:
1) and taking K measured sampling points to perform mean variance normalization processing on the deflection curve of the point B measured by the continuous force application of the point A according to the following formula (1):
wherein ,
xi: the sag depth of the ith frame;
μ: the sinking depth mean value of K sampling points;
σ2: sag depth variance of K sample points;
12) integrating the curve after the normalization processing, calculating the envelope area of the curve, and calculating according to the formula (2):
wherein ,
13) and expressing the envelope area as sag deflection, and calculating a final interference degree evaluation coefficient by the following formula (3):
taking the position of the center point i as an example, a coefficient set can be obtained: i ═ I1，…，IK}；
The third step: and taking the standard deviation sigma of the set I, and when the sigma is in the (0, 0.1) interval, expressing that the deflection interference coefficient between the subareas is in a good level, namely the interference degree is slight, so that the mattress can obtain better subarea comfort level.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the principle and spirit of the present invention, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.
Claims (10)
1. A test equipment for measuring the interference degree between subarea mattresses is characterized in that: including base (1), support, pressure displacement dual sensor (31) and laser displacement range sensor (42), be equipped with first guide rail (11) on base (1), the support slides and sets up on first guide rail (11), the support includes stand (21), first diaphragm (22) and second diaphragm (23) parallel interval are fixed on the upper portion of stand, be equipped with first guiding hole (25) in first diaphragm (22), pressure displacement dual sensor (31) slide and set up in first guiding hole (25), be equipped with second guiding hole (26) on second diaphragm (23), and first guiding hole (25) and second guiding hole (26) are located same vertical plane, and a plurality of laser displacement range sensor (42) slide and set up in second guiding hole (26), and laser displacement range sensor (42) pass first guiding hole (25) and are to being located base (1) on first guiding hole (25), and laser displacement range sensor (42) are passed And (6) detecting the deformation displacement of the mattress to be detected.
2. The test equipment for measuring the interference degree between the partitioned mattresses according to claim 1, wherein: pressure displacement dual sensor (31), laser displacement range sensor (42) are respectively through the slider setting in first guiding hole (25), second guiding hole (26), and drive through first drive arrangement respectively, first drive arrangement is including setting up the rack in first guiding hole (25) or second guiding hole (26) one side, with the fixed first driving motor of slider, be equipped with the gear on the first driving motor output shaft, the gear and rack cooperation drive the slider motion, and then drive pressure displacement dual sensor (31) or laser displacement range sensor (42) and slide.
3. The test equipment for measuring the interference degree between the partitioned mattresses according to claim 1, wherein: the double pressure-displacement sensors (31) are arranged on the sliding block through a screw rod lifter, the screw rod lifter comprises a transmission box (32) and a screw rod (33), the transmission box (32) is fixed with the sliding block, the screw rod (33) penetrates through the transmission box (32), and the double pressure-displacement sensors (31) are fixed to the lower portion of the screw rod.
4. The test equipment for measuring the interference degree between the partitioned mattresses according to claim 3, wherein: the upright post (21) is also driven by the first driving device on the first guide rail (11), and the upright post (21) is also provided with an electric control box (24) for controlling the first driving device and the screw rod lifter.
5. The test equipment for measuring the interference degree between the partitioned mattresses according to claim 1, wherein: the base (1) is further provided with two clamping and positioning devices, one clamping and positioning device is arranged on the first rail in a sliding mode, the other clamping and positioning device is fixed on the side edge, perpendicular to the first rail, of the base, and the two clamping and positioning devices are located on two sides of the support respectively.
6. The test equipment for measuring the interference degree between the partitioned mattresses according to claim 1, wherein: the clamping and positioning device comprises a supporting rod (51) and a pressing plate (52), the bottom of the supporting rod (51) is arranged on the first guide rail (11) in a sliding mode, a guide groove is further formed in the supporting rod (51), one end of the pressing plate (52) is arranged in the guide groove in a sliding mode, and the pressing plate (52) located in the guide groove and the bottom of the supporting rod (51) are provided with tension springs.
7. The test equipment for measuring the interference degree between the partitioned mattresses according to claim 1, wherein: the laser displacement distance measuring sensor (42) is fixed on the sliding block through a mounting rod (41).
8. A test method and an evaluation method for measuring the degree of interference between two-zone mattresses, characterized in that a test device according to any one of claims 1 to 7 is used and the following steps are carried out:
the first step is as follows: fixing the mattress (6) on the testing equipment, and adjusting the position of the pressure displacement dual sensor (31) according to the size of the mattress: aligning the pressure displacement double sensor (31) to a point A of the mattress, and aligning the laser displacement distance measuring sensor (42) to a point B of the mattress;
the second step is that: starting the test equipment, loading the pressure displacement double sensor (31) to 1000N at the speed of 90 +/-5 mm/min, and recording a sinking amount deflection curve in the loading process of A, B points;
the third step: the method for calculating the interference degree between the mattress sections comprises the following steps:
1) and taking K measured sampling points to perform mean variance normalization processing on the deflection curve of the point B measured by the continuous force application of the point A according to the following formula (1):
wherein ,
xi: the sag depth of the ith frame;
μ: the sinking depth mean value of K sampling points;
σ2: sag depth variance of K sample points;
2) integrating the curve after the normalization processing, calculating the envelope area of the curve, and calculating according to the formula (2):
wherein ,
3) and expressing the envelope area as sag deflection, and calculating a final interference degree evaluation coefficient by the following formula (3):
when I is in the (0, 0.1) interval, the deflection interference coefficient between the expression subareas is in a good level, namely the interference degree is slight, and the mattress can obtain better subarea comfort degree.
9. The test method and the evaluation method for measuring the degree of interference between the two-zone mattress according to claim 8 are characterized in that: the mattress lateral centerline is a mattress partition line (61), point a on the mattress is the mattress longitudinal centerline from the one side edge 1/4 position, and point a on the mattress is the mattress longitudinal centerline from the other side edge 3/8 position.
10. A test method and an evaluation method for measuring the interference degree between multi-partition mattress intervals are characterized in that: use of a test device according to any of claims 1 to 7, comprising the steps of:
the first step is as follows: fixing a mattress (6) on a test device, carrying out physical and logical partitioning on the mattress, setting the physical and logical partitioning as K, and measuring the coordinate (x) of the center point of each partition1，y1)、(x2，y2)、(x3，y3)、…、(xn，yn) And measuring the distance S between points12、S13、S14、…；
The second step is that: at each point (x) in turni，yi) Applying a load of 20kg, and measuring the vertical displacement DeltaL of each central point after stabilization1、ΔL2、ΔL3......ΔLnMeasuring in turn to obtain displacement data of each point;
k central point deflection interference coefficients are calculated in sequence, and the calculation steps of each central point deflection interference coefficient are as follows:
1) and taking K measured sampling points to perform mean variance normalization processing on the deflection curve of the point B measured by the continuous force application of the point A according to the following formula (1):
wherein ,
xi: the sag depth of the ith frame;
μ: the sinking depth mean value of K sampling points;
σ2: sag depth variance of K sample points;
4) integrating the curve after the normalization processing, calculating the envelope area of the curve, and calculating according to the formula (2):
wherein ,
5) and expressing the envelope area as sag deflection, and calculating a final interference degree evaluation coefficient by the following formula (3):
taking the position of the center point i as an example, a coefficient set can be obtained: i ═ I1，…，IK}；
The third step: and taking the standard deviation sigma of the set I, and when the sigma is in the (0, 0.1) interval, expressing that the deflection interference coefficient between the subareas is in a good level, namely the interference degree is slight, so that the mattress can obtain better subarea comfort level.
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Citations (8)
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| CN113567168B (en) | 2023-10-03 |
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