CN201434673Y - Three-dimensional human body size automatic measurement mechanism - Google Patents

Abstract

The utility model relates to a three-dimensional human body size automatic measuring mechanism which can be measured without removing the device, comprising a base, a beam, and a vertical guide rod installed between the base and the beam. A scanning device that moves up and down the vertical guide rod and a power drive device that drives the scanning device to move up and down along the vertical guide rod. The scanning device includes a stepping motor base, a stepping motor mounted on the stepping motor base, and a driven pulley The pulley base, the transverse guide rod between the stepping motor base and the pulley base, the toothed belt connecting the stepping motor and the driven pulley, the sliding belt connected to the toothed belt and moving laterally along the transverse guide rod Block and the infrared thermometer and scanning head installed on the slider, the measuring mechanism is not only small in size, light in weight, and compact in structure, but also can quickly and accurately measure the naked body size of the measured person without disassembly.

Description

Three-dimensional human body size automatic measurement mechanism

technical field

The utility model relates to a mechanical moving part of a non-contact infrared measurement system, which can quickly and accurately measure the naked size of a human body, and is a three-dimensional automatic measurement mechanism for human body size that can be measured without removing the device.

Background technique

At present, traditional anthropometric methods mainly use manual tools such as soft feet, angle gauges, altimeters, distance gauges, and slide gauges to measure the human body according to the measurement benchmark. Most of these methods are based on manual measurement or rely on Due to empirical observation, it is difficult to obtain some feature point data of the human body, and the accuracy of the measurement results is poor. Due to different measurement principles, the existing 3D anthropometric systems generally occupy a relatively large space, and the movement mechanism is complicated, the mass is large, and the overall movement is inconvenient. Generally, it is limited to laboratory use, and the measured person is subject to certain restrictions.

Contents of the invention

In order to overcome the shortcomings of the existing three-dimensional human body size automatic measurement system with complex structure, large volume and high cost, the utility model provides a three-dimensional human body size automatic measurement mechanism, which is not only small in size, light in weight and compact in structure, Moreover, the measured person can quickly and accurately measure the naked size of the human body without removing the equipment.

The technical scheme adopted by the utility model to solve its technical problems is: including a base, a beam, a vertical guide rod installed between the base and the beam, and a scanning device that moves up and down along the vertical guide rod is set on the vertical guide rod And the power drive device that drives the scanning device to move up and down along the vertical guide rod to achieve vertical scanning. The scanning device includes a stepping motor base, a stepping motor installed on the stepping motor base, and a pulley base for installing driven pulleys , the transverse guide rod set between the stepper motor seat and the pulley seat, the toothed belt connecting the stepper motor and the driven pulley, the slider connected to the toothed belt and moving laterally along the transverse guide rod, and the installation The infrared thermometer and scanning head on the slider complete the front and side scanning of the human body.

The power drive device for driving the scanning device to move up and down along the vertical guide rod is: a screw nut is fixedly installed on the scanning device, a lead screw is installed between the beam and the base, and the stepping motor drives the lead screw to rotate through the gear. .

Two horizontally arranged stepper motors are fixed on the stepper motor seat connected with the lead screw nut through slotted fastening screws, and the output shafts are respectively connected with pulleys, and the corresponding pulleys are equipped with driven motors on the pulley seat. The pulley is provided with a synchronous toothed belt between the pulley and the driven pulley, and the slide block is connected with the synchronous toothed belt through pressing pieces and screws, and is set on the transverse guide rod.

The output shaft of the stepper motor fixed on the base and arranged downward is connected with a gear, and the lead screw connected with the driven gear is rotated through the gear transmission. The lower end of the lead screw is supported by a radial thrust ball bearing, and the upper end is supported by a The centripetal ball bearing is positioned, guided by the vertical guide rod so that the screw nut matched with the lead screw produces linear motion in the vertical direction; one end of the horizontal guide rod is horizontally inserted into the blind hole on the stepper motor base to form an open connection , the other end of the transverse guide rod is threadedly connected with the pulley seat.

The beneficial effect of the utility model is that it can automatically, quickly and accurately measure the three-dimensional body size of the human body, and the mechanism has a compact structure, small volume, light weight, high transmission accuracy, and is easy to move.

Description of drawings

Fig. 1 is a front view of a three-dimensional human body size automatic measurement mechanism.

Fig. 2 is a left view of the three-dimensional human body size automatic measurement mechanism.

Fig. 3 is a sectional view along line A-A of Fig. 1 .

Fig. 4 is a view taken along direction B of Fig. 2 .

In the figure 1. Base, 2. Screw rod, 3. Lead screw nut, 4. Beam, 5. Centripetal thrust ball bearing, 6. Centripetal ball bearing, 7. Gear, 8. Vertical guide rod, 9. Horizontal Guide bar, 10. stepper motor seat, 11. pulley, 12. pulley, 13. synchronous toothed belt, 14. pulley seat, 15. vertical guide rod, 16. slide block, 17. gear, 18 .belt pulley, 19. pulley, 20. synchronous toothed belt, 21. pulley seat, 22 horizontal guide rod, 23. vertical guide rod, 24. slide block, 25. pressing tablet, 26. stepper motor, 27. Stepping motor, 28. Stepping motor.

Detailed ways

As shown in Figures 1, 2, 3, and 4, the utility model includes a base 1, a crossbeam 4, a vertical guide rod installed between the base 1 and the crossbeam 4, that is, the base 1, the crossbeam 4 and three vertical guide rods 8, 15, 23 connections form a frame structure.

A scanning device that moves up and down along the three vertical guide rods 8, 15, 23 and a power drive device that drives the scanning device to move up and down along the vertical guide rods are set on the three vertical guide rods 8, 15, 23 to achieve vertical scanning. , the power drive device for driving the scanning device to move up and down along the vertical guide rod is: a lead screw nut 3 is fixedly installed on the scanning device, a lead screw 2 is installed between the beam 4 and the base 1, and a stepping motor 26 Drive screw 2 to rotate through gear. That is, the output shaft of the stepper motor 26 fixed on the base 1 and arranged downward is connected with a gear 17, and the lead screw 2 connected with the driven gear 7 is rotated through the transmission of the gear 17, and the lower end of the lead screw 2 rests on the centripetal thrust ball bearing. 5 supports, the upper end is positioned by the centripetal ball bearing 6 installed on the beam 4, and the lead screw nut 3 that cooperates with the lead screw 2 is guided by the vertical guide rod to produce linear motion in the vertical direction; the horizontal guide rod 9,22 One end is horizontally inserted into the blind hole on the stepper motor base 10 to form an open connection, and the other ends of the transverse guide rods 9, 22 are threadedly connected with the pulley base 14, 21.

Scanning device comprises stepping motor base 10, the stepping motor 28,27 that is installed on the stepping motor base 10, the pulley base 21,14 that driven pulley 19,12 is installed, is arranged on stepping motor base 10 and belt The transverse guide bar 22,9 between the wheel bases 21,14, the synchronous toothed belt 20,13 that connects the stepper motor 28,27 and the driven pulley 19,12, is connected on the synchronous toothed belt 20,13 and The slide blocks 24, 16 moving laterally along the transverse guide rods 22, 9 and the infrared thermometer and scanning head installed on the slide blocks complete the front and side scanning of the human body.

Two horizontally arranged stepper motors 28, 27 are fixed on the stepper motor base 10 connected with the lead screw nut 3 by slotted fastening screws, and the output shafts are connected with pulleys 18, 11 respectively, corresponding to pulley 18 , 11 driven pulleys 19,12 are installed on pulley bases 21,14, synchronous toothed belts 20,13 are installed between pulleys 18,11 and driven pulleys 19,12, slide block 24, 16 is connected with the synchronous toothed belts 20, 13 by pressing pieces 25 and screws, and is sleeved on the transverse guide rod 22.

The measuring mechanism is mainly composed of a base, a beam, a lead screw, a lead screw nut, a vertical guide rod, a transverse guide rod, a stepper motor, a gear, a pulley, a synchronous toothed belt and a scanning device. The synchronous toothed belt drive realizes the reciprocating linear motion of the scanning device along the transverse guide rod to complete the front and side scanning of the human body, and the sliding screw drive composed of the lead screw and the lead screw nut realizes the up and down movement of the scanning device to achieve vertical scanning for the purpose of obtaining comprehensive data on the human body.

The measuring mechanism is an open structure, which consists of a base, three vertical guide rods and beams to form a frame, driven by three stepping motors to form three relatively independent movements. Two horizontally arranged stepping motors fixed on the stepping motor seat connected with the lead screw nut through slotted fastening screws, the output shafts are respectively connected with pulleys, through the driven pulley installed on the pulley seat, A synchronous toothed belt transmission is established. The infrared thermometer and the scanning head are installed on the slider, and the slider is connected with the synchronous toothed belt by screws through the pressing plate, so that the scanning device can realize the lateral reciprocating linear motion of the scanning device through the synchronous toothed belt transmission and the transverse guide rod guidance. Scan the front and side of the human body.

The output shaft of a stepper motor that is fixed on the base and arranged downwards is connected with a gear, and the lead screw connected with the driven gear is rotated through the gear transmission. The lower end of the lead screw is supported by a centripetal thrust ball bearing, and the upper end is supported by a centripetal thrust ball bearing. The ball bearing is positioned and guided by the vertical guide rod so that the lead screw nut matched with the lead screw produces linear motion in the vertical direction. Among them, the lead screw nut is connected with the stepper motor seat through slotted fastening screws, one end of the transverse guide rod is horizontally inserted into the blind hole on the stepper motor seat to form an open connection, and the other end of the transverse guide rod is screwed tightly to the pulley seat. Fixed connection, the pulley seat is guided by the vertical guide rod to produce linear motion in the vertical direction, so that the movement of the screw nut also drives the up and down movement of the scanning device on the synchronous toothed belt.

The guide rods used in this measuring mechanism are cylindrical sliding friction guide rods, which are two sets of horizontal guide rods and three vertical guide rods respectively. Accuracy requirements, but the gap is not easy to adjust. Because the moving part of a single cylindrical guide rod can not only move linearly along its axis, but also rotate around its axis, the auxiliary guide surface is used to limit the rotation of the slider; in order to reduce the corner error caused by the clearance, the design Appropriately increase the distance between two transverse guide rods in the same group. In order to reduce the inertia of the system, reduce friction, improve efficiency, and facilitate the dynamic response of the system, copper sleeves are added to all moving parts to reduce sliding friction with the guide rod. Among them, in order to facilitate the installation and debugging of the guide rod, one end of the auxiliary guide surface adopts an open structure. Since the lead screw must be able to rotate forward and reverse without self-locking phenomenon, the sliding lead screw adopts trapezoidal thread. Also, the strength and centering accuracy of the trapezoidal thread is better, which can eliminate the gap formed by wear. If there is backlash in the screw pair, the screw drive will produce backlash when the direction of rotation of the lead screw changes. For the precision screw transmission working under the forward and reverse transmission, the empty back will directly cause the transmission error, so it must be eliminated. The way to eliminate backlash is to eliminate the gap between the screw and the nut on the premise of ensuring the relative movement requirements of the screw pair. In the screw transmission of this device, the empty back is eliminated by using the adjusting nut through the radial adjustment method. In addition to the support function, the base in the measurement mechanism also uses the pressure sensor on it to measure the body weight, providing auxiliary data for size measurement. And the MI20 infrared thermometer used in the institution weighs only 130 grams. Because the distance between the centers of the two pulleys is large, in order to prevent the toothed belt from falling off during work, retaining rings are installed on both sides of the main pulley and the slave pulley.

Claims (4)

1. A three-dimensional human body size automatic measuring mechanism, comprising a base, a crossbeam, and a vertical guide rod installed between the base and the crossbeam, characterized in that: the vertical guide rod is equipped with a scanning device that moves up and down along the vertical guide rod. device and a power drive device that drives the scanning device to move up and down along the vertical guide rod. The transverse guide rod between the motor base and the pulley base, the toothed belt connecting the stepping motor and the driven pulley, the slider connected to the toothed belt and moving laterally along the transverse guide rod, and the slider installed on the Infrared thermometer and scanning head. 2. The three-dimensional human body size automatic measurement mechanism according to claim 1, characterized in that: the power drive device for driving the scanning device to move up and down along the vertical guide rod is: a screw nut is fixedly installed on the scanning device, A lead screw is installed between the beam and the base, and the stepping motor drives the lead screw to rotate through gears. 3. The three-dimensional human body size automatic measuring mechanism according to claim 2, characterized in that two horizontally arranged stepping motors are fixed on the stepping motor seat connected to the lead screw nut through slotted fastening screws, and The output shafts are respectively connected with pulleys, and the corresponding pulleys are equipped with a driven pulley on the pulley seat, and a synchronous toothed belt is installed between the pulley and the driven pulley. The type belt is connected and set on the transverse guide rod. 4. The three-dimensional human body size automatic measuring mechanism according to claim 2, characterized in that: the output shaft of the stepping motor fixed on the base and arranged downward is connected with a gear, and the wire connected with the driven gear is connected to the driven gear through gear transmission. The screw rotates, the lower end of the lead screw is supported by the radial thrust ball bearing, the upper end is positioned by the radial ball bearing installed on the beam, guided by the vertical guide rod so that the lead screw nut matched with the lead screw produces linear motion in the vertical direction; One end of the transverse guide rod is horizontally inserted into the blind hole on the stepping motor seat to form an open connection, and the other end of the transverse guide rod is screwed and fastened to the pulley seat.

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