An intelligent device and method for detecting dynamic driving postures

Abstract

The present invention relates to an intelligent device and method for detecting dynamic driving postures, belonging to the technical field of driving detection; the detection device is in the shape of an automobile seat, and a plurality of detection modules are arranged thereon. Each detection module is independently controlled. The detection module includes an air pump, an air delivery pipeline, an adjustment block, a sealed chamber, a fixed resistor, and a resistor connection wire. The air pump is connected to the sealed chamber through the air delivery pipeline. The adjustment block is installed on the sealed chamber, and the fixed resistor is installed on the adjustment block. Both ends of the fixed resistor are connected to the resistor connection wire, one end is fixed, and the other end is movable in contact. By measuring the change of the resistor, the change of the adjustment block is measured; the present invention detects the human body posture by measuring the change of the adjustment block through the change of the current of the fixed resistor, and can provide data such as the change of the seat force and the change of the sitting posture in real time, providing analysis data for simulation experiments and driving simulation experiments.

Description

Technical Field

[0001] The invention relates to an intelligent device and method for detecting dynamic driving posture, belonging to the technical field of driving detection. Background Art

[0002] In the fields of automobile simulation experiments and simulated driving, the two research directions are automobile performance and driver experience. In the research direction of driver experience, the driver's eye gaze point, heart rate, skin electricity, etc. are all tested, and the driver's sitting posture is also studied. At present, there is a lack of accurate sitting posture detection means. What is often used is to identify through cameras, use algorithms for calculation, analyze the changes in the sitting posture of the subjects, and judge the sitting posture through image recognition plus algorithm calculation. This type of method identifies sitting posture changes through bone calculation and other methods. The advantage is that it is easy to use and simple, but the disadvantage is very prominent. It is limited to the accuracy of equipment and the advancement of algorithms, resulting in low recognition rate and low recognition accuracy of this type of technology, which is only applicable to low-precision usage scenarios. There are also improvements to the seat itself in the existing technology, but these technologies do not involve improvements in real-time sitting posture recognition. At present, there is no directly related technology for sitting posture recognition through physical means.

[0003] Therefore, an intelligent device and method for detecting dynamic driving posture are provided, and the driver's sitting posture is identified by measuring the change of the adjustment block through the change of the resistance current. Summary of the invention

[0004] In order to overcome the problems existing in the background technology, the present invention uses a fixed resistor in conjunction with a current detection device to perform real-time detection of the adjustment block, and calculates the force condition of the detected seat to provide analysis data for simulation experiments and driving simulation experiments, thereby improving the detection accuracy of the seat force condition and the recognition rate of the driving posture. The hardness of the adjustment parts in different parts can be adjusted by an air pump. The present invention can also be used in the field of customized seats to provide dynamic sitting posture, force condition and other data when customizing seats.

[0005] In order to overcome the problems existing in the background technology and solve the above problems, the present invention is implemented through the following technical solutions:

[0006] An intelligent device for detecting dynamic driving postures includes a detection seat, a computer, an interactive display screen, and a detection module. The detection module includes an air pump, an air delivery pipe, an adjustment block, a sealed chamber, a fixed resistor, a fixed resistor connection wire, a sliding resistor connection wire, and a current detection device. The air pump is installed outside the sealed chamber and is connected to the sealed chamber through the air delivery pipe for gas exchange. The adjustment block is a small sealed cubic block, which is inlaid on the sealed chamber and is in seamless contact with the sealed chamber. The fixed resistor is vertically installed on the side surface of the adjustment block perpendicular to the top surface of the sealed chamber. The upper end of the fixed resistor is connected to the fixed resistor connection wire, and the other end of the fixed resistor connection wire is connected to the current detection device. One end of the sliding resistor connection wire is fixedly arranged at the adjustment block installation opening of the sealed chamber. The lower end of the sliding resistor is in sliding contact with the sliding resistor connection wire, and the other end is connected to the current detection device. Each pair of fixed resistors, fixed resistor connection wires, and sliding resistor connection wires forms a closed circuit, and the resistance in the circuit changes with the movement of the adjustment block. The air pump and the current detection device are connected to the computer for data interaction.

[0007] Preferably, a barometer is installed inside the sealed chamber to detect the air pressure inside the sealed chamber, and the barometer is connected to the computer.

[0008] Preferably, an air storage tank is installed at the rear side of the detection seat. The tank pipeline consists of two sections, and each section has multiple pipelines. A total control valve is arranged in the middle of the two sections. One section close to the air storage tank is connected to the air storage tank and the control valve, and the other section is connected to the control valve and the air pump. The control valve is also provided with an opening to the outside, which can inhale external air or directly discharge the internal gas to the outside.

[0009] Preferably, the adjustment block is of a sealed hollow structure, and the edge of the top plane of the adjustment part is chamfered so as not to prick the human body during use.

[0010] Preferably, the detection modules are grouped. The detection modules in one area are set as one group to form a number, and the computer centrally controls the entire group. The group can be changed according to actual needs.

[0011] Preferably, the outside of the detection seat is detachably wrapped with a layer of skin, and the skin covers all internal structures including the detection module.

[0012] A method for detecting dynamic driving postures is that the current detection device consists of a current meter, a voltage meter, and a microcontroller. The current meter and the voltage meter are connected to the microcontroller to measure and calculate the current value and the voltage value, and the relational expression is obtained according to Ohm's law and the resistivity calculation formula:

[0013]

[0014] Where: ρ is the resistivity, s is the cross-sectional area of the resistor, V0 represents the voltage measured by the voltmeter, I0 represents the current measured by the ammeter, and Ln represents the length of the real-time resistor;

[0015] Given the resistivity and the cross-sectional area of the resistor, the resistance value is proportional to the length. By measuring the change in the resistance value, the change in displacement can be obtained. That is, the actual length Ln of the resistor can be calculated through the measured current and voltage, and the moving height of the adjusting block can be obtained by subtracting the actual length from the original length.

[0016] Preferably, the method for measuring the softness and hardness of the detection module is as follows: The air pressure in the sealed cavity is measured by a barometer in the sealed cavity. The moving distance of the adjusting part has been calculated. At this time, the external air pressure is the atmospheric pressure. The resultant force formed by the two different air pressures can be calculated through the air pressure difference. The calculation formula for the internal air pressure acting force is:

[0017]

[0018] The external air pressure acting force is:

[0019]

[0020] When the adjusting part in the seat cushion area is moving up and down, affected by gravity, the acting force of the adjusting part at this time is:

[0021]

[0022] When the adjusting part in the seat back area is moving back and forth, not affected by gravity, the acting force of the adjusting part at this time is:

[0023]

[0024] In formulas (5), (6), (7), and (8): Fn is the internal air pressure acting force, F0 is the external air pressure acting force, ρn is the internal air pressure, s is the outer cross-sectional area of the adjusting part, K is the cross-sectional area of the annular structure of the adjusting part, ρ0 is the external atmospheric pressure, G is the gravity of the adjusting part, m is the mass of the adjusting part, and g is the acceleration due to gravity;

[0025] When a person leans on the seat, at this time the external air pressure does not do work. Therefore, the acting force on the person is the acting force of the internal air pressure and gravity on the adjusting part. The acting force in the backrest area is Fn, and the acting force in the seat cushion area is Fn - G. The softness and hardness of the detection module are reflected by the acting force on the person.

[0026] The beneficial effects of the present invention are:

[0027] The present invention performs real-time detection on the adjustment block through a fixed resistor in cooperation with a current detection device, calculates the force condition of the detected seat, provides analysis data for simulation experiments and driving simulation experiments, improves the detection accuracy of the seat force condition, enhances the driving sitting posture recognition rate, and adjusts the softness and hardness of different parts of the adjustment part through an air pump. The present invention can also be used in the field of customized seats to provide data such as dynamic sitting postures and force conditions when customizing seats. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the present invention;

[0029] Figure 2 is a schematic structural diagram of the sealed chamber of the present invention;

[0030] Figure 3 is a schematic installation diagram of the fixed resistor of the present invention;

[0031] Figure 4 is a top view of the sealed chamber of the present invention;

[0032] Figure 5 is a schematic diagram of the detected seat of the present invention;

[0033] Figure 6 is a connection diagram of the detection system of the present invention;

[0034] Figure 7 is a detection flow chart of the present invention.

[0035] The reference numerals in the figures are: 1 - detected seat; 2 - computer; 3 - interactive display screen; 4 - detection module; 5 - air pump; 6 - air delivery pipeline; 7 - adjustment block; 8 - sealed chamber; 9 - fixed resistor; 10 - fixed resistor wiring; 11 - sliding resistor wiring; 12 - current detection device; 13 - gas storage tank; 14 - tank pipeline; 15 - control valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] In order to make the objectives, technical solutions and beneficial effects of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings for the convenience of those skilled in the art to understand.

[0037] As Figures 1-6As shown in the figure, an intelligent device capable of detecting the dynamic posture of a driver includes a detection seat 1, a computer 2, an interactive display screen 3, and a detection module 4; the detection device 1 is in the shape of an automobile seat, on which a detection module 4 is provided. The outside of the detection seat 4 is wrapped with a skin, which covers all internal structures including the detection module 4, and the skin is detachable. The detection module 4 includes an air pump 5, an air delivery pipeline 6, an adjustment block 7, an airtight chamber 8, a fixed resistor 9, a fixed resistor wiring 10, a sliding resistor wiring 11, a current detection device 12, an air storage tank 13, and a tank pipeline 14. The air pump 5 is installed outside the airtight chamber 8 and exchanges gas with the airtight chamber 8 through the air delivery pipeline 6. The adjustment block 7 is a cubic airtight block, embedded in the installation hole on the airtight chamber 8, and is in seamless contact with the airtight chamber 8 to ensure the airtightness of the airtight chamber 8. The adjustment block 7 can move on the airtight chamber 8. The adjustment block 7 is a hollow structure, and the edge of the top plane of the adjustment part is chamfered and has an arc transition, so as not to prick the human body when in use. A clamping device is provided at the lower part of the adjustment block. One end of the clamping device is easy to enter, and the other end is not easy to enter. The end that is easy to enter is located near the bottom of the adjustment part, and the end that is not easy to enter is located away from the bottom of the adjustment part; a plurality of adjustment blocks 7 are embedded on each airtight chamber 8.

[0038] The fixed resistor 9 is pasted on the side of the adjustment block 7, and the set angle is consistent with the movement direction of the adjustment block 7, that is, perpendicular to the top surface of the sealed chamber 8. One end of the fixed resistor 9 far from the sealed chamber 8 is connected to the fixed resistor wiring 10, and the end close to the sealed chamber 8 is connected to the sliding resistor wiring 11. One end of the fixed resistor wiring 10 is fixed to one end of the fixed resistor 9, and the other end is connected to the current detection device 12. The sliding resistor wiring 11 is fixedly arranged on the sealed chamber 8, makes sliding contact with the fixed resistor 9, and the other end is also connected to the current detection device 12. Each pair of the fixed resistor 9, the fixed resistor wiring 10 and the sliding resistor wiring 11 forms a closed circuit, and the resistance in this circuit changes with the movement of the adjustment block 7. The ratio change of the resistance value of the fixed resistor 9 and the up and down movement distance of the adjustment block 7 is linear. By detecting the change of the real-time resistance in the circuit, the real-time movement distance of the adjustment block 7 can be calculated. The real-time change of the resistance in all circuits is the change situation of the entire detection seat 1, which is the dynamic sitting posture of the human body. The air storage tank 13 is arranged outside the detection seat 1 and stores different gases inside. The tank pipeline 14 is composed of two sections, and each section has multiple pipelines. A total control valve 15 is arranged in the middle of the two sections. One section close to the air storage tank 13 is connected to the air storage tank 13 and the control valve 15, and the other section is connected to the control valve 15 and the air pump 5. The control valve is also provided with an opening to the outside, which can inhale external air or directly discharge the internal gas to the outside. By the air pump 5, the internal gas is discharged outward or the external gas is inhaled into the internal space, thereby changing the gas density, that is, the air pressure, of the overall internal space of the adjustment part 7 and the sealed chamber 8. When the gas density is relatively high, it is not easy for the adjustment part 7 to move towards the sealed chamber 8, and at this time, the resistance received is relatively large; when the gas density is relatively low, it is relatively easy for the adjustment part 7 to move towards the sealed chamber 8, and at this time, the resistance received is relatively small. The user can change the initial gas density inside the sealed chamber 8, that is, the softness and hardness of the detection seat 1, through the interactive display screen.

[0039] The interactive display screen 3, the air pump 5, the current detection device 12, and the control valve 15 are connected to the computer, and data interaction is carried out through the data transmission module to group and control the detection module 4. Multiple detection modules 4 are in a group to form a number. One group number is set for the detection modules 4 in one area, and the computer 2 centrally controls the entire group. The group number can be changed according to actual needs to avoid problems such as low efficiency caused by the control of a single detection module 4.

[0040] The calculation process of a method for detecting dynamic driving postures is as follows: The current detection device consists of a current meter, a voltage meter, and a microcontroller. The current meter and the voltage meter are connected to the microcontroller to measure and calculate the current value and the voltage value. According to the formula

[0041]

[0042] It can be obtained that:

[0043]

[0044] Get the relational expression:

[0045]

[0046] In formulas (1), (2), (3), and (4): ρ is the resistivity, L is the resistance length, s is the cross-sectional area of the resistance, V represents voltage, I represents current, V0 represents the voltage value measured by the voltmeter, I0 represents the current value measured by the ammeter, and Ln represents the real-time resistance length;

[0047] Let the resistivity ρ be , the cross-sectional area s of the resistance is 40 cm². When the current value measured by the ammeter is 10 A and the voltage measured by the voltmeter is 220 V, the real-time resistance length at this time; when the current value measured by the ammeter is 15 A and the voltage measured by the voltmeter is 180 V, the real-time resistance length at this time.

[0048] Given the resistivity and the cross-sectional area of the resistance, the resistance value and the length are in a proportional relationship. By measuring the change in the resistance value, the change in displacement can be known. That is, the resistance length L can be calculated through the measured current and voltage, and further the moving height of the adjusting block can be obtained;

[0049] The air pressure in the sealed cavity is measured by the air pressure gauge in the sealed cavity. The moving distance of the adjusting part is known. At this time, the external air pressure is the atmospheric pressure. The resultant force formed by the two different air pressures can be calculated through the air pressure difference. The calculation formula for the acting force of the internal air pressure is:

[0050]

[0051] The acting force of the external air pressure is:

[0052]

[0053] When the adjusting part in the seat cushion area is moving up and down and is affected by gravity, the acting force of the adjusting part at this time is:

[0054]

[0055] When the adjusting part in the seat back area is moving back and forth and is not affected by gravity, the acting force of the adjusting part at this time is:

[0056]

[0057] In formulas (5), (6), (7), and (8): Fn is the acting force of the internal air pressure, F0 is the acting force of the external air pressure, Pn is the internal air pressure, s is the outer cross-sectional area of the adjusting part, K is the cross-sectional area of the annular structure of the adjusting part, P0 is the external atmospheric pressure, G is the gravity of the adjusting part, m is the mass of the adjusting part, and g is the acceleration due to gravity;

[0058] The external atmospheric pressure P0 is . If the top plane area S of the adjusting part is 10 cm² and the cross-sectional area K of the annular structure is 6 cm², then the force-bearing cross-sectional area of the internal gas is 10 - 6 = 4 cm², and the mass m of the adjusting part is 10 g. At this time, the gravity received by the adjusting part is:[[]] [[]]

[0059] The pressure of the atmospheric pressure on the adjusting part is:[[]]

[0060]

[0061] When the pressure inside the adjusting part is:[[]]

[0062]

[0063]

[0064] When the pressure inside the adjusting part is:[[]]

[0065]

[0066] When a person leans on the seat, at this time the external air pressure does not do work. Therefore, the force received by the person is the force exerted on the adjusting part by the internal air pressure and gravity. The force in the backrest area is Fn, and the force in the seat cushion area is Fn - G. The softness and hardness of the detection module are reflected through the force received by the person.[[]]

[0067] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.[[]]

Claims

1. An intelligent device for detecting dynamic driving postures, comprising a detection seat (1), a computer (2), an interactive display screen (3), and a detection module (4), characterized in that: The detection module (4) includes an air pump (5), an air delivery pipeline (6), an adjustment block (7), a sealed chamber (8), a fixed resistor (9), a fixed resistor connection wire (10), a sliding resistor connection wire (11), and a current detection device (12). The air pump (5) is installed outside the sealed chamber (8) and is connected to the sealed chamber (8) through the air delivery pipeline (6) for gas exchange. The adjustment block (7) is a sealed cubic small block, which is inlaid and installed on the sealed chamber (8) and is in seamless contact with the sealed chamber (8). The fixed resistor (9) is vertically installed on the side of the adjustment block (7) perpendicular to the top surface of the sealed chamber (8). The upper end of the fixed resistor (9) is connected to the fixed resistor connection wire (10), and the other end of the fixed resistor connection wire (10) is connected to the current detection device (12). One end of the sliding resistor connection wire (11) is fixedly set at the installation opening of the adjustment block (7) of the sealed chamber (8). The lower end of the sliding fixed resistor (9) is in sliding contact with the sliding resistor connection wire (11), and the other end is connected to the current detection device (12). Each pair of the fixed resistor (9), the fixed resistor connection wire (10), and the sliding resistor connection wire (11) forms a closed circuit, and the resistance in the circuit changes with the movement of the adjustment block (7). The air pump (5) and the current detection device (12) are connected to the computer (2) for data interaction.

2. The intelligent device for detecting dynamic driving postures according to claim 1, characterized in that: A barometer is installed in the sealed chamber (8) for detecting the air pressure in the sealed chamber (8), and the barometer is connected to the computer (2).

3. The intelligent device for detecting dynamic driving postures according to claim 1, characterized in that: An air storage tank (13) is installed at the rear of the detection seat (1). The tank pipeline (14) consists of two sections, each section having multiple pipelines. A total control valve (15) is provided in the middle of the two sections. One section close to the air storage tank (13) is connected to the air storage tank (13) and the control valve (15), and the other section is connected to the control valve (15) and the air pump (5). The control valve (15) is also provided with an opening to the outside, which can inhale external air or directly discharge the internal gas to the outside.

4. The intelligent device for detecting dynamic driving postures according to claim 1, characterized in that: The adjustment block (7) is of a sealed hollow structure, and the edge of the top plane of the adjustment block (7) is chamfered so as not to prick the human body during use.

5. The intelligent device for detecting dynamic driving postures according to claim 1, characterized in that: The detection modules (4) are grouped. The detection modules (4) in one area are set as one group to form a number, and the entire group is centrally controlled by the computer (2). The group can be changed according to actual needs.

6. The intelligent device for detecting dynamic driving postures according to claim 1, characterized in that: The outside of the detection seat (1) is detachably wrapped with a skin, and the skin covers all internal structures including the detection module (4).

7. A method for detecting a dynamic driving posture, applied to an intelligent device for detecting a dynamic driving posture according to any one of claims 1-6, characterized in that, Including: The current detection device consists of an ammeter, a voltmeter and a microcontroller. The ammeter and the voltmeter are connected to the microcontroller to measure and calculate the current value and the voltage value, and the relational expression is obtained according to Ohm's law and the resistivity calculation formula: Where: ρ is the resistivity, S is the cross-sectional area of the resistor, V0 represents the voltage value measured by the voltmeter, I0 represents the current value measured by the ammeter, and L n represents the length of the real-time resistor; Given the resistivity and the cross-sectional area of the resistor, the resistance value is proportional to the length. By measuring the change in the resistance value, the change in displacement can be obtained, and thus the real-time resistance length L can be calculated from the measured current and voltage. n The moving height of the adjusting block is obtained by subtracting the actual length from the original length.

8. A method for detecting a dynamic driving posture according to claim 7, characterized in that: The method for measuring the softness and hardness of the detection module is as follows: the air pressure in the sealed cavity is measured by a barometer in the sealed cavity, the moving distance of the adjusting block has been calculated, the external air pressure is the atmospheric pressure at this time, and the resultant force formed by two different air pressures can be calculated through the air pressure difference. The calculation formula for the internal air pressure acting force is: F n = ρ n (s - K)(5) The external air pressure acting force is: F0 = ρ0s (6) The adjusting block in the seat cushion area of the detection seat moves up and down and is affected by gravity. At this time, the acting force of the adjusting block is: F 合 = F n - G - F0 = ρ n (s - K) - mg - ρ0s (7) The adjusting block in the seat back area of the detection seat moves back and forth and is not affected by gravity. At this time, the acting force of the adjusting block is: F 合 = F n - F0 = ρ n (s - K)-ρ0s (8) In Formulas (5), (6), (7), and (8): Fn is the internal air pressure force, F0 is the external air pressure force, ρ n is the internal air pressure, s is the outer cross-sectional area of the adjustment block, K is the cross-sectional area of the annular structure of the adjustment block, ρ0 is the external atmospheric pressure, G is the gravity of the adjustment block, m is the mass of the adjustment block, and g is the acceleration due to gravity; When the human body leans on the seat, the external air pressure does not do work at this time. Therefore, the force acting on the person is the force exerted by the internal air pressure and gravity on the adjustment block. The force acting on the backrest area is F n , and the force acting on the seat cushion area is F n -G, and the softness and hardness are detected through the force acting on the person by the force reaction detection module.

Images