阅读说明：本技术 一种压力可控的触觉刺激呈现装置 (Controllable tactile stimulation of pressure presents device ) 是由 杨佳楠 卢志骞 陈思 于 2020-04-27 设计创作，主要内容包括：本发明提供了一种压力可控的触觉刺激呈现装置,包括载物台、可固定露指防护手套、可替换样本带、气垫导轨、滑轨、电流线圈、弹簧和距离检测调节模块；所述电流线圈用于产生磁场,所述载物台通过磁场悬浮在机架上方；所述可替换样本带固定于载物台上,且平行分布；所述可固定露指防护手套悬挂方式安置在载物台上方,且所述可固定露指防护手套分别对应所述可替换样本带；所述滑轨一端与载物台一端连接,所述滑轨与气垫导轨移动副连接,所述滑轨另一端通过弹簧与机架连接；一个传感器用于检测载物台的悬浮距离。本发明通过施加不同程度的压力以及完整的采样样本来满足丰富的触觉信息来源及触觉信号的完整表达。(The invention provides a pressure-controllable tactile stimulation presenting device which comprises an objective table, a fixable finger exposing protective glove, a replaceable sample belt, an air cushion guide rail, a sliding rail, a current coil, a spring and a distance detection and adjustment module, wherein the objective table is provided with a plurality of fixed finger exposing protective gloves; the current coil is used for generating a magnetic field, and the object stage is suspended above the rack through the magnetic field; the replaceable sample belts are fixed on the objective table and distributed in parallel; the fixable mitt is arranged above the objective table in a hanging manner and corresponds to the replaceable sample belts respectively; one end of the slide rail is connected with one end of the objective table, the slide rail is connected with the air cushion guide rail moving pair, and the other end of the slide rail is connected with the rack through a spring; a sensor is used to detect the levitation distance of the stage. The invention satisfies a rich source of haptic information and a complete representation of the haptic signal by applying varying degrees of pressure and a complete sample.)

1. The pressure-controllable tactile stimulation presenting device is characterized by comprising an object stage (1), a fixable finger exposing protective glove (3), a replaceable sample belt (2), an air cushion guide rail (4), a sliding rail (9), a current coil (5), a spring (8) and a distance detection and adjustment module; the current coil (5) is used for generating a magnetic field, and the object stage (1) is suspended above the rack through the magnetic field; the replaceable sample belts (2) are fixed on the objective table and distributed in parallel; the fixable mitt (3) is arranged above the objective table (1) in a hanging manner, and the fixable mitt (3) corresponds to the replaceable sample belt (2) respectively; one end of the sliding rail (9) is connected with one end of the objective table (1), the sliding rail (9) is connected with the moving pair of the air cushion guide rail (4), and the other end of the sliding rail (9) is connected with the rack through a spring (8); a sensor is used for detecting the suspension distance of the object stage (1), and a current coil (5) is controlled by a distance detection and adjustment module and is used for stabilizing the position of the object stage (1); the other sensor is used for detecting the acting force applied to the spring (8).

2. The pressure-controllable tactile stimulus presentation device of claim 1, wherein five sample tapes are provided on the replaceable sample tape (2) and respectively correspond to five fingers of the fixable mitt (3).

3. A tactile stimulus presentation device with controllable pressure according to claim 1, characterized in that the other sensor is a displacement sensor, the magnitude of the friction force being calculated by detecting the deformation displacement of the spring (8).

4. Pressure-controlled tactile stimulus presentation device according to claim 1, characterized in that one sensor is a photosensor (6) for detecting the levitation distance of the object table (1).

5. A pressure controlled tactile stimulus presentation device according to claim 1, further comprising a weight applied on the fixable mitt (3) for increasing positive pressure during the test.

6. A pressure controllable tactile stimulus presentation device according to claim 5, wherein the fingertip portion of said fixable mitt (3) is equipped with a pressure sensor for detecting the amount of pressure exerted by said weight.

Technical Field

The invention relates to the field of biomedicine, artificial intelligence or touch acquisition, in particular to a pressure-controllable touch stimulation presenting device.

Background

Haptic sensations can provide a human body with environmental information that is not available from other sensory channels. Through different operations such as touch, press, hold between fingers, people can accurately learn the object material characteristic, discern different material types, like the clothing of different fabrics, the drinking cup of different materials etc.. The sense of touch is a perception channel which is participated in by a plurality of nerve channels and is influenced by various aspects such as individual physiological parameters, external environment, interaction modes and the like. The human nerve tissue transmits external stimulation information in the interaction process to the brain to complete recognition analysis, and corresponding behavior response is carried out. The current brain science tactile mechanism research urgently needs to find the minimum number of basic representation dimensions to describe tactile texture, and in the process, a tactile stimulation device which can well present the tactile sensation is needed firstly.

Liu Ying et al in China have studied a novel tactile sensor array based on conductive rubber and information acquisition and analysis processing system thereof, have designed and developed the novel tactile sensor array that has characteristics such as area array area is big, sensitivity is high, the pliability is better, it is not fragile when being strikeed, stand wear and tear, resolution ratio is adjustable to and simple structure, with low costs, information acquisition and processing system that the flexibility is high, be expected to provide new solution for the development of sense of touch signal automatic acquisition device. The system for acquiring, analyzing and processing the information of the touch sensor array comprises the touch sensor array, a PCI-6259 data acquisition card, an SCB-68 board card connector, a scanning circuit, a signal acquisition circuit, a signal processing circuit, a shielding cable, a PC (personal computer) and the like. When the touch sensor array is acted by external force, the resistance of the conductive rubber forming the sensitive element is reduced, the switch circuit is switched on, and the change of the output signal of the circuit can reflect the condition of external action. The row and column of each touch sensor array are accessed into a scanning circuit, block selection is carried out through the scanning circuit, voltage signals sensed by each sensitive element are sequentially sent to a signal conditioning circuit, and then the conditioned signals are collected into a computer in a line-by-line scanning mode through a PCI-6259 controlled by the computer, so that the acquisition of array sensing signals is realized; a data acquisition and analysis system based on a graphical programming language LabVIEW is designed, and a data acquisition card is driven to complete acquisition of an analog voltage signal and a digital signal and send an address control signal; a three-dimensional display processing system is designed by using the OpenGL technology, and the visual display of the outline of a contact object and the pressure distribution of a contact surface is realized by processing, analyzing and displaying a data signal; information acquisition and analysis processing experimental research is carried out, and acquisition, data processing and contact object outline display of the array signals of the touch sensor are completed. Theoretical analysis and experimental research show that the novel touch sensor array based on the conductive rubber and the information acquisition and analysis processing system thereof are completely feasible, and can realize accurate acquisition of large-area touch sensing information, thereby providing a new method for developing the touch sensor array.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the pressure-controllable tactile stimulation presenting device, which can meet the requirements of rich tactile information sources and complete expression of tactile signals by applying pressures of different degrees and complete sampling samples.

The present invention achieves the above-described object by the following technical means.

A pressure-controllable tactile stimulation presenting device comprises an object stage, a fixable mitt, a replaceable sample belt, an air cushion guide rail, a slide rail, a current coil, a spring and a distance detection and adjustment module; the current coil is used for generating a magnetic field, and the object stage is suspended above the rack through the magnetic field; the replaceable sample belts are fixed on the objective table and distributed in parallel; the fixable mitt is arranged above the objective table in a hanging manner and corresponds to the replaceable sample belts respectively; one end of the slide rail is connected with one end of the objective table, the slide rail is connected with the air cushion guide rail moving pair, and the other end of the slide rail is connected with the rack through a spring; a sensor is used for detecting the suspension distance of the object stage, and the current coil is controlled by the distance detection and adjustment module and is used for stabilizing the position of the object stage; the other sensor is used for detecting the acting force applied to the spring.

Furthermore, five sample belts are arranged on the replaceable sample belt and correspond to the five fingers of the protective gloves capable of fixing the fingers one by one respectively.

Furthermore, the other sensor is a displacement sensor, and the friction force is calculated by detecting the deformation displacement of the spring.

Further, one sensor is a photoelectric sensor for detecting the levitation distance of the stage.

Further, still include the weight, the weight is applyed and can be fixed on finger-exposing hand protector for increase positive pressure in the test process.

Further, a pressure sensor is arranged on a fingertip part of the fixable mitt and used for detecting the pressure applied by the weight.

The invention has the beneficial effects that:

1. the pressure-controllable tactile stimulation presenting device disclosed by the invention can ensure that the objective table is fixed on a suspension point by adopting an electromagnetic suspension technology, real-time monitoring and real-time adjustment are realized, and the influence on an experimental result caused by the movement of the objective table is avoided.

2. The pressure-controllable tactile stimulation presenting device has the advantages that the air cushion guide rails are adopted, so that the force is not deviated or lost in the transmission process.

3. The pressure-controllable tactile stimulation presenting device can fix the fingers of a subject by the fixable finger exposing protective gloves, the effect on the result cannot be caused by the movement of the subject, and meanwhile, the subject cannot be injured in the experiment process.

4. According to the pressure-controllable tactile stimulation presenting device, the adoption of the multi-sample belt can ensure that different subjects cannot be associated and the result cannot be influenced.

5. The pressure-controllable tactile stimulation presenting device can accurately measure the applied pressure and control the applied pressure by adding different numbers of weights to achieve different degrees of pressure.

Drawings

Fig. 1 is a schematic structural diagram of a controllable pressure tactile stimulus presentation device according to the present invention.

In the figure:

1-an object stage; 2-a sample strip; 3-fixable mitt; 4-air cushion guide rails; 5-a current coil; 6-ranging photoelectric sensor 1; 7-ranging photoelectric sensor 2; 8-a spring; 9-sliding rail.

Detailed Description

The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.

As shown in fig. 1, the controllable pressure tactile stimulation presenting device comprises a stage 1, a fixable mitt 3, a replaceable sample belt 2, an air cushion guide rail 4, a slide rail 9, a current coil 5, a spring 8 and a distance detection and adjustment module; the current coil 5 is used for generating a magnetic field, and the object stage 1 is suspended above the rack through the magnetic field; the replaceable sample belts 2 are fixed on the objective table and distributed in parallel; the fixable mitt 3 is arranged above the objective table 1 in a hanging manner, and the fixable mitt 3 respectively corresponds to the replaceable sample belts 2; one end of the slide rail 9 is connected with one end of the objective table 1, the slide rail 9 is connected with the moving pair of the air cushion guide rail 4, and the other end of the slide rail 9 is connected with the rack through a spring 8; a sensor is used for detecting the suspension distance of the object stage 1, and a current coil 5 is controlled by a distance detection and adjustment module and is used for stabilizing the position of the object stage 1; the other sensor is used to detect the force to which the spring 8 is subjected. The other sensor is a displacement sensor, and the friction force is calculated by detecting the deformation displacement of the spring 8. One sensor is a photosensor 6 for detecting the levitation distance of the stage 1.

Five sample belts are arranged on the replaceable sample belt 2 and respectively correspond to five fingers capable of fixing the mitt 3 one by one. Weights are applied to the fixable mitt 3 for increasing positive pressure during the test. The fingertip part of the fixable mitt 3 is provided with a pressure sensor for detecting the pressure applied by the weight.

The working process is as follows:

the pressure-controllable tactile stimulation presenting device provided by the invention has the following working process: firstly, the current coil 5 is electrified to enable the objective table 1 to be fixed at a certain suspension point and connected with the slide rail 9, the hand of a subject is inserted into the fixable mitt 3 during a test, the hand position is adjusted to be positioned right above the replaceable sample belt 2, when the position of the objective table 1 is changed due to the fact that the subject presses the objective table 1 in the experimental process, the photoelectric sensor 7 below the hand feeds back a detection result to the distance detection and adjustment module, and the distance detection and adjustment module controls the magnetic field generated by the current coil 5, so that the distance between the objective table 1 and a frame is ensured to be unchanged; if the subject makes the objective table level unbalance because of other behaviors, the photoelectric sensor 6 below will detect the distance, and the experiment is carried out again when the error is large. The sample belt on the finger touch objective table with the fixable mitt is worn to generate friction to drive the sliding rail to move, and the spring deformation is used for measuring the friction force to present the touch signal in the form of the friction force. And the touch stimulation signal is finally completely presented by placing different numbers of weights on the finger to apply different degrees of pressure for multiple measurements.

The weight is added above the fingertip of the tested person, the pressure sensor of the fingertip can detect the mass of the weight in real time, and the purpose of pressure controllability is achieved by adding weights with different quantities. The subject slides along the sample belt direction on the sample belt 2, so as to drive the object stage 1 and the slide rail 9 to move, so that the spring 8 generates corresponding elastic deformation, and the corresponding friction force can be obtained through measurement.

The test subject can replace a new sample band after one experiment is finished, so that the mutual influence of different experiments can be prevented. Multiple experiments with different pressures were performed on the same subject, and the measured friction force would reflect the different stimulus sensations of the finger on the same object at different pressures. And abundant tactile information sources and complete expression of tactile signals are realized.

The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.