CN2234088Y - Three-dimension distribution force measurer - Google Patents

Abstract

The utility model relates to a three-dimension distribution force measurer, belonging to a measuring device which can measure interaction force between two objects. The three-dimension distribution force measurer is especially suitable for measuring the distribution of the interaction force between a person and the objects. The three-dimension distribution force measurer is composed of a test probe of three-dimension distribution force, a data collecting device of a microprocessor and a personal microcomputer, wherein the test probe of three-dimension distribution force is composed of a plurality of fixed three-dimension force sensors which are arranged orderly. The data collecting device of a microprocessor is composed of a plurality of microprocessors. Brackets of the three-dimension force sensors are made of metal section. The three-dimensional and dynamic measurement of the distribution force is achieved. The three-dimension distribution force measurer can be extensively used for diagnosing joint disease, analyzing the cause of sports injury, analyzing and improving sports technology, improving artificial limb, researching interacting distribution force between the person and the objects, and measuring interaction force between the objects, etc.

Description

The distributed in three dimensions force tester

The utility model belongs to object interphase interaction force measurement device.Be mainly used in the surveying instrument of the distribution of people and object interphase interaction power.

Interaction between people and object, mostly occur with the form of " distributed force ", before the utility model, measuring technique for distributed force, nothing more than two kinds: the first is measured its " equivalent concentrated force ", be the size of making a concerted effort, direction and the application point that measurement result only provides this acting force, the dynamometer produced of Switzerland KISTER (Kistler) company for example; It two is the component of only measuring in the distributed force perpendicular to the local measurement surface (vertical component), for example the pressure distribution dynamometer produced of Britain EMED (Ethylmercurichlorendimide moral) company.Though first kind of measuring method satisfied requirement on dynamometry dimension and speed, make a concerted effort because of surveying, and just inapplicable under many circumstances.

The purpose of this utility model is at present existing defective being tested in distributed force, a kind of distributed in three dimensions force tester that can reflect the distribution of power more exactly is provided, it can carry out dynamic test to distributed force, provides size, direction, active position that distributed force acts on each local power.

The distributed in three dimensions force tester is by distributed in three dimensions power test probe, microprocessor data harvester and personal computer three parts are formed, wherein distributed in three dimensions power test probe fixedly is made up of the three-dimensional force sensor of a plurality of marshallings, and each three-dimensional force sensor is that the foil gauge by support and the component of sensitization on x, y, three mutually perpendicular directions of z that paste respectively thereon constitutes.The second portion microprocessor data harvester of distributed in three dimensions force tester is by a plurality of microprocessors and multiple selector switch group, differential amplifier, mould/number (A/D) converter, storer, compositions such as I/O port (I/O mouth) and serial port.Another characteristics of the present utility model are that the support of each three-dimensional force sensor of formation is to be made by the shape that has three faces at least.The course of work of distributed in three dimensions force tester is: the force sensing element foil gauge on the three-dimensional force sensor converts electric signal proportional with it to " the local power " that acts on each three-dimensional force sensor to, these electric signal are defeated by second portion with the form of analog quantity, through multiple selector switch and after being exaggerated, become digital quantity by A/D converter and be stored in the microprocessor.Each microprocessor is responsible for the analog electrical signal of some is gathered, and carries out successively in the internal mode/number conversion of each microprocessor, and each microcomputer then can be synchronously, can work successively.The digital quantity that is stored in each microprocessor is read by personal computer (PC/AT) through serial port separately, shows and processing further.

The distributed in three dimensions force tester owing to adopted the three-dimensional force sensor of unique design, has solved the problem of dimension in the distributed force test, makes the three-dimensional test to distributed force become possibility.Because the employed material of support of manufacturing sensor is a shape, processing technology is simple, has reduced cost again.Signals collecting part of the present utility model is designed to " data collector " be made up of a plurality of microprocessors, has solved the signals collecting speed issue in the distributed force test, makes the dynamic test of distributed force become possibility." function block " structure of the data collector of being made up of a plurality of microprocessors is the big characteristics of one, and theoretically, this structure can ad infinitum increase by the quantity of acquired signal under the situation that does not change picking rate.In sum, the utility model has been realized three-dimensional, the kinetic measurement to distributed force.Appearance of the present utility model can promote the further investigation of people and object interphase interaction, and its application prospect is that factory is wealthy, for example, and aspect the auxiliary diagnosis of joint disease; Evaluation for operation back functional rehabilitations such as osteoarthrosis, ligaments; Analysis to the athletic injury reason; All can have important use at the aspects such as improvement of Motion Technology diagnosis, artificial limb is worth.

Fig. 1 is a distributed in three dimensions power test probe structural profile synoptic diagram.

Fig. 2 is the structural representation of three-dimensional force sensor.

Fig. 3 is the minor structure figure in the microprocessor data harvester.

Among the figure 1,2-sensor (support), 3-fixed frame shell, the multiple selector switch of 4-, 5-differential amplifier, 6-A/D converter, P1.0, P1.1, P1.2 ...-I/O port, 7-serial port, 8-support, A, B, C, D, E, F--foil gauge.

Below in conjunction with embodiment, the contrast accompanying drawing is further described the utility model: as shown in Figure 1, distributed in three dimensions power test probe, selection is made up of 336 three-dimensional force sensors, be fixed in the frame shell 3 by 12 * 28 arrays, form, experience the size of the local power of people and object interphase interaction power at conplane distributed in three dimensions power probe, direction and position, and be converted into proportional electric signal.By the force cell that shape is made, its big I has multiple choices, thereby the test surfaces of test probe also can change.Again by after connect the character of " microprocessor data gather group ", the number of sensors that it comprised can arbitrarily increase and decrease, promptly test surfaces can increase or dwindle.Shown in Figure 2 is the structure of three-dimensional force sensor.Its support 8 is by 15 millimeters of segment lengths, and outer cross section is 15 * 15 millimeters, and interior cross section is the cubic block that 12 * 12 millimeters hollow square aluminium alloy extrusions is made.Two foil gauge A, B and C, D are respectively pasted in end face center line two ends and madial wall center line bottom within it.Calculating by the mechanics of materials is provable: the vertical component of the power of two slices sensitizations of A, B on cradle top surface, and the direction that Z is indicated is not experienced its horizontal component; Two of C, D then only experience the y durection component in the horizontal component of this acting force, do not experience the position of its vertical component and application point.This cloth sheet mode has cut off the coupling between the vertical and horizontal component preferably.On another same (bottom) support position that only sidewall and C, D sheet are identical within it, two foil gauges of subsides E, F are with the horizontal component that becomes 90 ° of directions with y of the x direction of experiencing this acting force.As can be seen from Figure, lower bracket 2 is the three-dimensional force sensors that become the distributed in three dimensions force tester of 90 ° of compositions that are fixed together with upper bracket 1 its state.Figure 3 shows that the minor structure in the microprocessor data harvester.Data collector in this instrument is made up of a plurality of microprocessors, is responsible for collection, storage and the transmission of signal.Its effect be equivalent to one between signal source and personal-machine buffer zone, be specially adapted to quick collection to many (thousands of road) signal.The signal that is stored in each microprocessor is read by PC/AT by both sides' serial ports.10 minor structures forming the data acquisition group have adopted BDE-537 (BDEmodul-537/Light) lightweight modules of being produced by German PHYTEC company, and each institute expands to 96 tunnel (or more than 96 tunnel) according to 12 tunnel analog quantitys that have input it.BDE-537 also has: the A/D converter of 10 bits (Bit), and under the local frequency of 16MHz, its mould/number conversion time is 7 μ s (microsecond); 32KRAM; RS232 serial port etc.Its performance meets the demands fully.Multiple selector switch group 4 in the minor structure shown in the accompanying drawing 3 generally is made of 12 8-1 (output of 8 inputs) multiple selector switch of COMS type.The input end and the signal source of switch join (1/4th bridges or half raise that constitute by foil gauge)." ten " (homophase) input end of its output and differential amplifier 5 joins.The output of differential amplifier respectively with BDE-537 in inside 12 input terminals having an A/D converter 6 of 12 tunnel analog inputs join.Control multiple selector switch group by the P1 I/O port (I/O mouth) that BDE-537 provided.Entire work process is as follows: BDE-537 sends instruction and at first selects the first passage of each 8-1 multi-breal switch by the P1 mouth, connects 12 road A/D converters then, carries out analog to digital conversion, storage successively.Then select the second channel of each 8-1 multi-breal switch again by P1, connect analog to digital conversion, storage again.Repeat down like this, finish up to the predetermined test duration.Existed the signal among the BDE-537 to read by serial ports successively, carried out required data processing by PC/AT.

Claims (2)

1, distributed in three dimensions force tester, it is characterized in that forming by distributed in three dimensions power side probe header, microprocessor data harvester and personal computer three parts, wherein distributed in three dimensions power test probe fixedly is made up of the three-dimensional force sensor of a plurality of marshallings, and each three-dimensional force sensor to be foil gauge by support and the component of sensitization power on x, y, three orthogonal directions of z that paste respectively thereon constitute; Its microprocessor data harvester is made up of microprocessor and multiple selector switch group, differential amplifier, mould/number (A/D) converter, storer, defeated people/delivery outlet (I/O mouth) and serial port.

2, according to the said distributed in three dimensions force tester of claim 1, it is characterized in that three-dimensional force sensor support in the said distributed in three dimensions power test probe be by have at least three and shape make.

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