Intelligent weight checking backpack

Abstract

The utility model discloses an intelligent weight checking backpack which comprises a backpack body, two backpack belts are arranged on the backpack body, and a force measuring unit and a signal amplifying unit are arranged in the backpack body and the backpack belts. The force measuring unit comprises a tension sensor and a pressure sensor, the tension sensor is arranged in the knapsack belt, the pressure sensor is arranged at the bottom of the knapsack body, a tension resistance strain gauge is arranged in the tension sensor, and a pressure resistance strain gauge is arranged in the pressure sensor; the pressure sensor is deformed by pressing of articles in the backpack and converts and outputs a weight signal through internal resistance change in the pressure resistance strain gauge, and the tension sensor is deformed under the action of tension borne by the backpack belt and outputs a tension signal through resistance change in the tension resistance strain gauge. The backpack has the advantage that the weight of the backpack and the bearing weight of the shoulder straps of the backpack can be known in real time.

Description

Technical Field

[0001] The present application relates to the technical field of intelligent backpack equipment, and in particular to an intelligent weight-checking backpack. Background Art

[0002] Backpack refers to the bag that is carried on the back. The materials are diverse, such as leather, plastic, polyester, canvas, nylon, cotton and linen. People often use backpacks in their daily life. The carrying capacity of backpacks varies due to the different materials. At the same time, users do not have much idea about the weight they can accept and the load that the backpack can bear.

[0003] The backpack used in the related art does not have the function of knowing the weight of the items in the backpack and the tension of the shoulder straps in real time during use, resulting in the user not knowing the weight of the backpack and the weight range of the backpack shoulder straps. In addition to affecting the service life of the backpack, an overweight backpack will also cause damage to the bones and joints of the human body. Carrying the backpack for a long time will also cause hunchback due to the heavy backpack, affecting the beauty of the body. Summary of the invention

[0004] In order to solve the problem that the user does not know the weight of the backpack and the weight range of the backpack shoulder straps, the present application provides an intelligent weight checking backpack.

[0005] The intelligent weight check backpack provided in this application adopts the following technical solution:

[0006] An intelligent weight checking backpack comprises a backpack body, two backpack straps are arranged on the backpack body, and a force measuring unit and a signal amplifying unit are arranged in the backpack body and the backpack straps;

[0007] The force measuring unit includes a tension sensor and a pressure sensor, wherein the tension sensor is arranged in the backpack strap, and the pressure sensor is arranged at the bottom of the backpack body, wherein the tension sensor is provided with a tension resistance strain gauge, and wherein the pressure sensor is provided with a pressure resistance strain gauge;

[0008] The pressure sensor is deformed by the items in the backpack, and outputs a weight signal through the change of internal resistance in the pressure resistor strain gauge. The tension sensor is deformed by the tension of the backpack strap, and outputs a tension signal through the change of resistance in the tension resistor strain gauge.

[0009] The signal amplification unit includes a pressure signal amplification integrator and a tension signal amplification integrator, the weight signal is transmitted to the pressure signal amplification integrator through a wire, and the tension signal is transmitted to the tension signal amplification integrator through a wire;

[0010] The backpack strap is provided with a side bag, and a display panel is provided in the side bag. The pressure signal amplifying integrator is connected with the tension signal amplifying integrator and the display panel signal.

[0011] By adopting the above technical solution, when the user carries the backpack body on his back, since the backpack body is in a drooping state, the pressure sensor detects the weight of the items placed inside the backpack body and outputs the item weight signal. At the same time, the backpack strap bears the weight of the items inside the backpack body and generates a downward pulling force. At this time, the tension on the backpack strap is detected by the tension sensor and a tension signal is output. At this time, since the weight signal is transmitted to the pressure signal amplifying integrator through a wire, the tension signal is transmitted to the tension signal amplifying integrator through a wire and the pressure signal amplifying integrator is connected to the tension signal amplifying integrator and the display panel signal. The display will then display the gravity signal data and the tension signal data, thereby prompting the user of the weight of the items in the backpack and the tension on the backpack strap during the process of carrying the backpack, to prevent it from breaking during use.

[0012] Preferably, connection holes are formed through the top walls at both ends of the tension sensor, and the ends of the backpack straps pass through the connection holes.

[0013] Preferably, a signal output end is provided on one end of the tension sensor, and the signal output end is connected to one end of a wire, and the other end of the wire is connected to one end of a tension signal amplifying integrator.

[0014] Preferably, an embedded groove is formed through the pressure sensor, and the elastic pressure resistance strain gauge is slidably arranged in the embedded groove. The signal end of one end of the pressure sensor is connected to one end of the pressure signal amplifying integrator through a wire.

[0015] Preferably, both ends of the tension resistor strain gauge are fixedly connected to the middle of the tension sensor, and the tension resistor strain gauge is slender.

[0016] Preferably, the pressure sensor is a thin plate type, and the pressure sensor is arranged at the inner bottom of the backpack body.

[0017] Compared with the prior art, the beneficial effects of this application are:

[0018] Since the weight signal is transmitted to the pressure signal amplifying integrator through the wire, the tension signal is transmitted to the tension signal amplifying integrator through the wire, and the pressure signal amplifying integrator is connected to the tension signal amplifying integrator and the display panel signal, the display will display the gravity signal data and the tension signal data at this time, thereby reminding the user of the weight of the items in the backpack and the tension of the backpack strap when carrying the backpack, so as to prevent the backpack from breaking during use;

[0019] At the same time, by measuring the weight of the items in the backpack and the weight borne by the backpack straps, the safe bearing range of the backpack body can be known, thereby improving the usage scenarios of the backpack. At the same time, the user can store the items in the backpack according to the safe range displayed by the data, avoiding the excessive weight of the items in the backpack affecting the service life of the backpack and the occurrence of joint injuries and hunchbacks caused by users carrying too heavy backpacks. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the backpack structure for this application;

[0021] Figure 2 This is a schematic diagram of the tension detection module in this application;

[0022] Figure 3 This is a schematic diagram of the wire installation structure in this application;

[0023] Figure 4 This is a schematic diagram of the pressure detection module in this application;

[0024] Figure 5 This is a module flow chart in this application.

[0025] In the figure: 1. backpack body; 11. backpack strap; 12. side bag; 121. display panel; 2. force measuring unit; 20. tension sensor; 201. connection hole; 202. tension resistor strain gauge; 203. signal output terminal; 21. pressure sensor; 212. embedded groove; 213. pressure resistor strain gauge; 4. wire; 6. signal amplifying unit; 61. tension signal amplifying integrator; 62. pressure signal amplifying integrator. Implementation

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] See also Figure 1-5 , the present application provides a technical solution: an intelligent weight check backpack, comprising a backpack body 1, two backpack straps 11 are arranged on the backpack body 1, and a force measuring unit 2 and a signal amplifying unit 6 are arranged in the backpack body 1 and the backpack straps 11;

[0028] The pressure sensor 21 produces elastic deformation under the action of pressure, so that the pressure resistance strain gauge 213 pasted inside is deformed together. After the pressure resistance strain gauge 213 is deformed, the resistance value changes, and the change of resistance is converted into a weight signal through the corresponding measurement circuit;

[0029] The tension sensor 20 is arranged in the shoulder strap, and produces elastic deformation under the action of tension, so that the tension resistance strain gauge 202 pasted inside is deformed together, and the resistance value of the tension resistance strain gauge 202 changes after deformation, and the change of resistance is converted into a tension signal through the corresponding measurement circuit;

[0030] The signal amplifying unit 6 includes a pressure signal amplifying integrator 62 and a tension signal amplifying integrator 61. The weight signal is transmitted to the pressure signal amplifying integrator 62 through the wire 4, and the tension signal is transmitted to the tension signal amplifying integrator 61 through the wire 4.

[0031] The backpack strap 11 is provided with a side bag 12 , and a display panel 121 is provided in the side bag 12 . The pressure signal amplifying integrator 62 is signal-connected to the tension signal amplifying integrator 61 and the display panel 121 .

[0032] The pressure sensor 21 and the tension sensor 20 belong to the category of resistive strain sensors, with the tension resistor strain gauge 202 as the conversion element. The tension resistor strain gauge 202 is tightly fitted to the sensor strain beam by high-temperature curing. When the sensor is subjected to external force, the tension resistor strain gauge 202 attached inside is deformed, and the tension resistor strain gauge 202 converts the deformation into a change in resistance value, thereby achieving the purpose of measuring the change in force value.

[0033] The materials of the pressure sensor 21 and the tension sensor 20 can be alloy steel and stainless steel. The patch center spacing is large and 4 half-bridge patches are used. Special tooling is required during the clamping process to avoid the problem of large zero points during product testing.

[0034] The two ends of the tension resistance strain gauge 202 are fixedly connected to the middle of the tension sensor 20, and the tension resistance strain gauge 202 is slender; the top walls of the two ends of the tension sensor 20 are penetrated with connection holes 201, and the ends of the backpack strap 11 penetrate the connection holes 201. The use of the slender tension sensor 20 is more convenient for the elastic deformation of the sensor and also convenient for embedding the tension sensor 20 in the backpack strap 11, reducing the manufacturing process and manufacturing cost of the backpack body 1.

[0035] A signal output terminal 203 is provided on one end of the tension sensor 20, and the signal output terminal 203 is connected to one end of the wire 4, and the other end of the wire 4 is connected to one end of the tension signal amplifying integrator 61; the sensor is connected to the signal amplifying integrator using the wire 4 to improve the stability and accuracy of the signal data transmission, avoid errors in the model data transmission process, and cause inaccurate measurements.

[0036] The pressure sensor 21 is provided with an embedded groove 212, and an elastic pressure resistance strain gauge 213 is slidably arranged in the embedded groove 212. The signal end of one end of the pressure sensor 21 is connected to one end of the pressure signal amplifying integrator 62 through a wire 4. The pressure sensor 21 is a thin plate type, and the pressure sensor 21 is arranged at the inner bottom of the backpack body 1. The thin plate type pressure sensor 21 is easy to produce elastic deformation during the midday pressing process, thereby increasing its trigger sensitivity and improving the detection effectiveness of the pressure sensor 21.

[0037] Working principle of the present application: when the user uses the backpack, since the backpack body 1 is in a drooping state, the pressure sensor 21 is elastically deformed under the action of pressure, causing the pressure resistor strain gauge 213 pasted inside to deform along with it. The resistance value of the pressure resistor strain gauge 213 changes after deformation, and the change in resistance is converted into a weight signal through a corresponding measuring circuit; the tension sensor 20 is arranged in the shoulder strap, and is elastically deformed under the action of tension, causing the tension resistor strain gauge 202 pasted inside to deform along with it. The resistance value of the tension resistor strain gauge 202 changes after deformation, and the change in resistance is converted into a tension signal through a corresponding measuring circuit. The weight signal is transmitted to the pressure signal amplifier integrator 62 through the wire 4, and the tension signal is transmitted to the tension signal amplifier integrator 61 through the wire 4. Since the pressure signal amplifier integrator 62 is connected to the tension signal amplifier integrator 61 and the display panel 121, the weight signal and the tension signal can be displayed through the display, which is convenient for the user to observe.

[0038] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An intelligent weight checking backpack, comprising a backpack body (1), wherein the backpack body (1) is provided with two backpack straps (11), characterized in that: A force measuring unit (2) and a signal amplifying unit (6) are arranged in the backpack body (1) and the backpack belt (11); The force measuring unit (2) comprises a tension sensor (20) and a pressure sensor (21), wherein the tension sensor (20) is arranged in the backpack strap (11), and the pressure sensor (21) is arranged at the bottom of the backpack body (1), wherein the tension sensor (20) is provided with a tension resistance strain gauge (202), and wherein the pressure sensor (21) is provided with a pressure resistance strain gauge (213); The pressure sensor (21) is deformed by the pressure of the items in the backpack, and outputs a weight signal by converting the internal resistance change in the pressure resistance strain gauge (213); the tension sensor (20) is deformed by the tension borne by the backpack strap (11), and outputs a tension signal by the resistance change in the tension resistance strain gauge (202); The signal amplifying unit (6) comprises a pressure signal amplifying integrator (62) and a tension signal amplifying integrator (61), the weight signal is transmitted to the pressure signal amplifying integrator (62) via a wire (4), and the tension signal is transmitted to the tension signal amplifying integrator (61) via a wire (4); The backpack strap (11) is provided with a side bag (12), and a display panel (121) is provided in the side bag (12), and the pressure signal amplifying integrator (62) is signal-connected to the tension signal amplifying integrator (61) and the display panel (121).

2. The intelligent weight check backpack according to claim 1, characterized in that: Connection holes (201) are formed through the top walls at both ends of the tension sensor (20), and the ends of the backpack straps (11) pass through the connection holes (201).

3. The intelligent weight check backpack according to claim 2, characterized in that: A signal output end (203) is provided at one end of the tension sensor (20), and the signal output end (203) is connected to one end of a wire (4), and the other end of the wire (4) is connected to one end of a tension signal amplifying integrator (61).

4. The intelligent weight check backpack according to claim 1, characterized in that: The pressure sensor (21) is provided with an embedded groove (212) extending therethrough, and the elastic pressure resistance strain gauge (213) is slidably arranged in the embedded groove (212). The signal end at one end of the pressure sensor (21) is connected to one end of the pressure signal amplifying integrator (62) via a wire (4).

5. The intelligent weight check backpack according to claim 2, characterized in that: The two ends of the tension resistance strain gauge (202) are fixedly connected to the middle of the tension sensor (20), and the tension resistance strain gauge (202) is slender.

6. The intelligent weight check backpack according to claim 1, characterized in that: The pressure sensor (21) is of a thin plate type and is arranged at the inner bottom of the backpack body (1).

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