Backpack comfort detection device, system and method

Abstract

The present invention discloses a backpack comfort detection device and method, including adjusting the distribution positions of multiple pressure sensors according to the appearance characteristics of the subject, making the pressure test area correspond to the corresponding body part, and gradually loading and reloading the backpack during the subject's activities, continuously testing and collecting the pressure value of the backpack comfort detection device, respectively calculating the pressure peak and average value of each area, as well as the distribution and change trend, calculating the ratio of the backpack's pressure on the waist and back to the shoulder pressure, and obtaining the backpack comfort evaluation result. The present invention realizes the detection of the pressure tolerance of the straps through the cooperation between the fixing mechanism and the detection mechanism, thereby obtaining a real and effective measurement structure, which provides a certain reference value for users to choose different backpacks.

Description

Technical Field

[0001] The present invention relates to the technical field of backpacks, and in particular to a backpack comfort detection device, system and method. Background Art

[0002] The existing test of backpack carrying pressure mainly uses a single-point pressure pad to measure the single-point pressure of the shoulder strap or back, or a sheet pressure pad to measure the pressure of an area on the back of the backpack, and then calculates the pressure value of each point to analyze the pressure distribution of the shoulder strap and the back. During the backpack pressure test, the wearer is in motion and the position is adjusted according to the user's usage habits. The elasticity, softness and breathability of the shoulder strap can affect the user's comfort. The pressure pad is easy to loosen and move, resulting in inaccurate test data; the layout of the pressure pad is relatively random, and it is difficult to unify the position of the measuring point in two tests, which makes data analysis difficult; in addition, when multiple pressure sensors or pressure pads are used at the same time, the installation is complicated and the data coordination is difficult, which increases the difficulty of the experiment and increases the cost of the experiment. The existing test method cannot directly evaluate the comfort of the backpack, and can only evaluate the backpack carrying comfort based on the experience or subjective judgment of the experimenter. Here, the pressure of the shoulder strap is taken as an indicator to detect the comfort of the schoolbag. For this reason, a backpack comfort detection device and method are proposed. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of inaccurate pressure bearing capacity detection of backpacks in the prior art and the lack of effective detection means, and to propose a backpack comfort detection device to provide a certain reference value for backpack pressure testing.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A subject wears the backpack comfort testing device, and according to the subject's appearance characteristics, the distribution positions of multiple pressure sensors are adjusted so that the pressure test area corresponds to the corresponding part of the body;

[0006] B. During the subject's activity, the backpack is gradually loaded;

[0007] C continuously tests and collects the pressure values ​​of the eight zones of the backpack comfort detection device, calculates the peak and average pressure values ​​of each zone, as well as the distribution and change trend, and calculates the ratio of the backpack pressure on the waist and back to the shoulder pressure;

[0008] D According to the pressure ratio of waist and back to shoulder of 4:1 as the evaluation factor of carrying comfort, the data collected by the backpack pressure test system is calculated and analyzed to obtain the backpack comfort evaluation result.

[0009] Furthermore, the pressure sensor is a piezoelectric film sensor.

[0010] Furthermore, the backpack comfort detection device includes a backpack-type test seat and multiple straps, the straps are distributed on the subject's body to fix the backpack to prevent sliding, the backpack-type test seat is fixedly connected to a horizontal mounting rod, and the side of the mounting rod is installed with straps through multiple fixing mechanisms, the backpack-type test seat is connected to a mounting frame, a mounting groove is opened on the mounting frame, a connecting block is slidably connected to the mounting groove, a pressure sensor is fixedly connected to the connecting block, the detection end of the pressure sensor is located on the side of the strap, and the mounting frame is connected to an adjustment mechanism.

[0011] Furthermore, a plurality of mounting plates are fixedly connected to the side surfaces of the mounting frame, and the mounting plates are connected to the top of the backpack-type test seat via a plurality of bolts.

[0012] Furthermore, the fixing mechanism comprises an elastic band fixedly connected to the side of the mounting rod, a round fleece layer is provided on the side of one end of the elastic band, a curly fleece layer is provided on the other side of the other end of the elastic band, and the round fleece layer and the curly fleece layer are hook-engaged.

[0013] Furthermore, the adjustment mechanism includes a limit rod slidably connected to the inside of the mounting frame, a connecting cavity is opened inside the mounting frame, the outer wall of the limit rod is fixedly sleeved with a fixing ring located inside the connecting cavity, the outer wall of the limit rod is sleeved with a spring, the two ends of the spring are respectively fixedly connected to the fixing ring and the connecting cavity, and a plurality of adjustment openings corresponding to the limit rod are opened on the side of the connecting block.

[0014] Furthermore, one end of the limiting rod away from the adjustment port is fixedly connected with a pull ring.

[0015] A backpack comfort detection system comprises a backpack comfort detection device, a signal processing module and a main control module, wherein the power module is respectively connected to the comfort acquisition module, the signal processing module and the power input terminal of the main control module, the comfort acquisition module, the signal processing module and the main control module are connected in sequence, the comfort acquisition module comprises a pressure sensor, and the main control module comprises a microcontroller and the wireless transmission module; the output terminal of the pressure sensor is connected to the input terminal of the signal processing circuit, the output terminal of the signal processing circuit is connected to the input terminal of the microcontroller, and the output terminal of the microcontroller is connected to the signal input terminal of the wireless transmission module.

[0016] Comfort collection unit collects pressure values ​​of shoulders, chest, waist and back through multiple sets of detection devices

[0017] The wireless transmission unit is used to transmit the pressure values ​​of the shoulders, chest and waist and back to the main control unit.

[0018] The main control unit is used to perform weighted evaluation on the data collected at multiple points to obtain a comfort value.

[0019] Furthermore, the comfort acquisition module collects data at least once per minute, and continuously collects data for 20 minutes or until the measured value is stable.

[0020] Furthermore, the wireless transmission module is a Bluetooth transmission module, a Wifi transmission module and an RFID transmission module.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. Through the cooperation between the fixing mechanism and the detection mechanism, the pressure bearing capacity of the shoulder strap can be tested, so as to obtain a real and effective measurement structure, providing a certain reference value for users to choose different backpacks.

[0023] 2. It can be adjusted at will according to the size of the backpack and the body shape of the subject. The measurement position is fixed and convenient, the measurement data is output in a coordinated manner, and the data processing is simple and efficient. Through the cooperation between the fixing mechanisms, multiple elastic belts are used to install the straps on the side of the mounting rod to ensure the stability of the straps to be tested. The further setting of the elastic belts meets the needs of straps of different sizes and thicknesses.

[0024] 3. By measuring the pressure distribution of the backpack on the shoulders, back and waist, the backpack's carrying comfort can be quantitatively evaluated, providing a scientific basis for enterprises to improve backpack design. The present invention is suitable for testing and evaluating the comfort of backpacks and other carrying products, and provides scientific data and methods for the design and evaluation of carrying products. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A flowchart of a backpack comfort detection method is proposed for the present invention;

[0026] Figure 2 This is a test installation diagram of the backpack comfort detection device proposed by the present invention;

[0027] Figure 3 This is a schematic structural diagram of a backpack comfort detection device proposed by the present invention;

[0028] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0029] Figure 5 This is a schematic structural diagram of a round hair layer and a bristle layer on an elastic belt of a backpack comfort detection device proposed by the present invention.

[0030] In the figure: 1 backpack test seat, 2 bolts, 3 mounting rods, 4 pressure sensors, 5 mounting frames, 6 shoulder straps, 8 elastic bands, 11 mounting slots, 12 adjustment ports, 13 limiting rods, 14 connecting chambers, 15 fixing rings, 16 connecting blocks, and 17 springs. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] like Figure 1 As shown, the present invention comprises the following steps:

[0033] A subject wears the backpack comfort testing device, and according to the subject's appearance characteristics, the distribution positions of multiple pressure sensors are adjusted so that the pressure test area corresponds to the corresponding part of the body;

[0034] B. During the subject's activity, the backpack is gradually loaded;

[0035] C continuously tests and collects the pressure values ​​of the eight zones of the backpack comfort detection device, calculates the peak and average pressure values ​​of each zone, as well as the distribution and change trend, and calculates the ratio of the backpack pressure on the waist and back to the shoulder pressure;

[0036] D According to the pressure ratio of waist and back to shoulder of 4:1 as the evaluation factor of carrying comfort, the data collected by the backpack pressure test system is calculated and analyzed to obtain the backpack comfort evaluation result.

[0037] In this embodiment, according to the analysis of a large number of backpack carrying experimental data, the pressure distribution of the backpack on the shoulders and waist and back is the main factor affecting the carrying comfort. The reasonable distribution of the weight ratio during the weight-bearing process should be 80% on the waist and back, and 20% on the shoulders. The 20% weight on the shoulders should not all fall on the shoulders, but should be distributed on the clavicle or shoulder blades. The backpack pressure comfort evaluation system of the present invention uses the shoulder pressure distribution, the waist and back pressure distribution and the ratio of the backpack pressure on the waist and back to the shoulder pressure as the carrying comfort evaluation factors, and uses the carrying comfort evaluation equation established through a large number of experiments. By processing and analyzing the data collected by the backpack pressure test system, the backpack pressure comfort evaluation system directly gives the backpack comfort evaluation results, as well as the problems and improvement suggestions of the backpack design.

[0038] According to the target user characteristics of the backpack, subjects who meet the requirements are selected. The subjects put on the backpack pressure test system. According to the backpack style and the appearance characteristics of the subjects, the pressure test system is adjusted to make the pressure test area correspond to the corresponding part of the body. The subjects carry the loaded backpack and carry out activities. The test collects the pressure values ​​of the 8 zones of the "pressure vest". The pressure values ​​are collected once every minute for 20 minutes continuously or when the measured values ​​are stable. The measured values ​​are transmitted to the backpack pressure comfort evaluation system in the computer via Bluetooth, and the measured values ​​of the 8 zones are analyzed. The peak and average pressure values ​​of each zone are calculated, as well as the distribution and change trend. The ratio of the backpack's back pressure to the shoulder pressure is calculated. The data collected by the backpack pressure test system are calculated and analyzed using the carrying comfort evaluation equation to obtain the backpack comfort evaluation results, as well as the problems and improvement suggestions in the backpack design.

[0039] Reference Figure 3-5 , a backpack comfort detection device, comprising a backpack test seat 1, a horizontal mounting rod 3 is fixedly connected to the upper part of the backpack test seat 1, and a shoulder strap 6 is installed on the side of the mounting rod 3 through multiple fixing mechanisms, the fixing mechanism comprises an elastic band 8 fixedly connected to the side of the mounting rod 3, a round wool layer is provided on the side of one end of the elastic band 8, and a curled wool layer is provided on the other side of the other end of the elastic band 8, and the round wool layer and the curled wool layer are hooked and clamped, a mounting frame 5 is connected to the upper part of the backpack test seat 1, and multiple mounting plates are fixedly connected to the side of the mounting frame 5, and the mounting plates are connected to the upper part of the backpack test seat 1 through multiple bolts 2, a mounting groove 11 is opened on the upper part of the mounting frame 5, and a connecting block 16 is slidably connected to the upper part of the mounting groove 11, and a pressure sensor 4 is fixedly connected to the upper part of the connecting block 16, and the detection end of the pressure sensor 4 is located on the side of the shoulder strap 6, and through the cooperation between the fixing mechanisms, multiple elastic bands 8 are used to mount the shoulder strap 6 on the side of the mounting rod 3 to ensure the stability of the shoulder strap 6 to be detected, and the further setting of the elastic band 8 satisfies the shoulder strap 6 of different sizes and thicknesses.

[0040] An adjusting mechanism is connected to the mounting frame 5, and the adjusting mechanism includes a limiting rod 13 slidably connected to the inside of the mounting frame 5, a connecting cavity 14 is provided inside the mounting frame 5, an outer wall of the limiting rod 13 is fixedly sleeved with a fixing ring 15 located inside the connecting cavity 14, and an outer wall of the limiting rod 13 is sleeved with a spring 17, and both ends of the spring 17 are respectively fixedly connected to the fixing ring 15 and the connecting cavity 14, a plurality of adjusting ports 12 corresponding to the limiting rod 13 are provided on the side of the connecting block 16, and a pull ring is fixedly connected to one end of the limiting rod 13 away from the adjusting port 12, and the height of the pressure sensor 4 can be freely adjusted through the cooperation between the adjusting mechanisms to correspond to the measurement of different positions of the detection strap 6, and the average value of multiple measurements is taken to ensure the authenticity of the measurement results.

[0041] In the present invention, the connecting block 16 at the bottom of the pressure sensor 4 is installed in the mounting groove 11, and then the backpack strap 6 to be detected is placed on the side of the mounting rod 3, and a plurality of elastic bands 8 are passed around the strap 6 to be detected, so that the round hair layer and the curly hair layer on the elastic band 8 are adhered to each other, and the strap 6 is stably installed on the side of the mounting rod 3, and the switch of the pressure sensor 4 is turned on, so that the output end of the pressure sensor 4 is set on the strap and the pressure value of each position is recorded, and the detection position of the pressure sensor 4 on the strap 6 can be adjusted to record the pressure value again and record the average value. Adjustment process: pull the limit rod 13 through the pull ring to disengage the limit rod 13 from the adjustment port 12, and then move the connecting block 16 to control the height of the pressure sensor 4. After the pressure sensor 4 moves to the indicated position, the limit rod 13 is inserted into the corresponding adjustment port 12 to limit the height of the pressure sensor 4.

[0042] The same method is used to continue testing other backpack straps 6, and the bearing capacity of different positions of multiple backpack straps 6 is obtained to measure the comfort of different backpacks. When used specifically, it can be selected according to needs.

[0043] In one embodiment, the pressure sensor sends the current environment data to the main control module via Bluetooth transmission technology. The use of Bluetooth transmission technology can get rid of the constraints of cables and has the advantages of short installation period, convenient maintenance and strong expansion capability.

[0044] In one embodiment, the pressure sensor can also send the current environment data to the main control module via wired transmission, so that data interaction can be easily achieved. In actual use, it can be selected according to needs.

[0045] The current pressure data is compared with the preset pressure comfort factor data, and the comparison method is not limited. In one embodiment, the current pressure data is compared with the preset pressure comfort factor data to obtain the current pressure data difference.

[0046] (1) The present invention can be used to conveniently and quickly measure and collect backpack pressure values ​​and other data. However, in the existing backpack pressure testing technology, the pressure pad is easily loosened and moved during testing, the pressure measurement point positions are inconsistent, and the installation and debugging are complicated, which can easily cause problems such as inaccurate test data and difficulties in data coordination and analysis. The backpack pressure testing system in the present invention, the "pressure vest", is easy to put on and take off, can be adjusted at will according to the size of the backpack and the body shape of the subject, the measurement position is convenient to fix, the measurement data is output in a coordinated manner, and the data processing is simple and efficient.

[0047] (2) The present invention can directly give the backpack comfort evaluation result, while the existing backpack pressure testing technology cannot directly evaluate the comfort of the backpack and can only evaluate the backpack carrying comfort based on the experience or subjective judgment of the experimenter. The backpack pressure comfort evaluation system of the present invention uses shoulder pressure distribution, chest pressure distribution, waist and back pressure distribution and the ratio of the backpack pressure on the waist and back to the shoulder pressure as the evaluation factors for carrying comfort, and uses the carrying comfort evaluation equation established through a large number of experiments. By processing and analyzing the data collected by the backpack pressure testing system, the backpack pressure comfort evaluation system directly gives the backpack comfort result, as well as the problems existing in the backpack design and improvement suggestions.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A backpack comfort detection device, characterized in that: The device includes a pressure sensor, which is a piezoelectric film sensor; The device also includes a backpack test seat and a plurality of shoulder straps, the shoulder straps are distributed on the outer shape of the subject to fix the backpack to prevent sliding, the backpack test seat is fixedly connected to a horizontal mounting rod, the side of the mounting rod is mounted with shoulder straps through a plurality of fixing mechanisms, the backpack test seat is connected to a mounting frame, the mounting frame is provided with a mounting groove, the mounting groove is slidably connected with a connecting block, the connecting block is fixedly connected with a pressure sensor, the detection end of the pressure sensor is located on the side of the shoulder strap, and the mounting frame is connected with an adjustment mechanism; A plurality of mounting plates are fixedly connected to the side of the mounting frame, and the mounting plates are connected to the backpack-type test seat through a plurality of bolts; the adjustment mechanism comprises a limit rod slidably connected to the inside of the mounting frame, a connecting cavity is provided inside the mounting frame, an outer wall of the limit rod is fixedly sleeved with a fixing ring located inside the connecting cavity, a spring is sleeved on the outer wall of the limit rod, and two ends of the spring are respectively fixedly connected to the fixing ring and the connecting cavity, and a plurality of adjustment ports corresponding to the limit rods are provided on the side of the connecting block; The fixing mechanism includes an elastic band fixedly connected to the side of the mounting rod, a round fleece layer is provided on the side of one end of the elastic band, a curly fleece layer is provided on the other side of the other end of the elastic band, and the round fleece layer and the curly fleece layer are hooked together; a pull ring is fixedly connected to the end of the limiting rod away from the adjusting port.

2. A backpack comfort detection method, characterized in that: The detection method is performed based on the backpack comfort detection device according to claim 1, and includes: A. The subject wears the backpack comfort detection device, and the distribution positions of the plurality of pressure sensors are adjusted according to the subject's appearance characteristics, so that the pressure test area corresponds to the corresponding part of the body; B. During the subject's activity, the backpack is gradually loaded; C. Continuously test and collect the pressure values ​​of the eight zones of the backpack comfort detection device, calculate the peak and average pressure values ​​of each zone, as well as the distribution and change trend, and calculate the ratio of the backpack pressure on the waist and back to the shoulder pressure; D. According to the ratio of waist and back pressure to shoulder pressure of 4:1 as the carrying comfort evaluation factor, the data collected by the backpack pressure test system is calculated and analyzed to obtain the backpack comfort evaluation results.

3. A backpack comfort detection system, characterized in that: The backpack comfort detection device according to claim 1 is specifically: The system comprises a signal processing module, a main control module, a power module, and a comfort acquisition module; the power module is respectively connected to the comfort acquisition module, the signal processing module, and the power input terminal of the main control module, and the comfort acquisition module, the signal processing module, and the main control module are connected in sequence; the comfort acquisition module comprises the pressure sensor, and the main control module comprises a microcontroller and a wireless transmission module; The output end of the pressure sensor is connected to the input end of the signal processing module, the output end of the signal processing module is connected to the input end of the microcontroller, and the output end of the microcontroller is connected to the signal input end of the wireless transmission module; Among them, the comfort acquisition module collects the pressure values ​​of the shoulders, chest and waist and back through multiple groups of pressure sensors; the wireless sending module is used to transmit the pressure values ​​of the shoulders, chest and waist and back to the main control unit; the main control module is used to perform weighted evaluation on the data collected from multiple points to obtain the comfort value.

4. A backpack comfort detection system according to claim 3, characterized in that: The comfort acquisition module collects data at least once per minute, and continuously collects data for 20 minutes or until the measured value stabilizes.

5. A backpack comfort detection system according to claim 3, characterized in that: The wireless sending module is at least a Bluetooth sending module.

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