CN2066135U - Electronic digit display dynamics metering unit - Google Patents

Abstract

The utility model relates to an electronic digital display dynamics metering device controlled by a microcomputer. The utility model is composed of a bearer, a resistance strain gauge and an electronic digital display device controlled by the microcomputer. The display device is composed of a resistance strain gauge, a bridge circuit, an amplifying circuit, a multiplex and A/D converting circuit, a microcomputer system, a display circuit and a power supply. The existing similar dynamics metering devices (for instance a boxing machine, a wrist developer, an arm force exerciser, etc.) have the defects, such as zero drift and fewer functions, while the instrument overcomes the defects. The utility model can be used as a strength training apparatus and a recreation apparatus.

Description

Electronic digit display dynamics metering unit

The utility model relates to the electronic digit display dynamics meter regulator tool, such as electronic digit display type boxing machine, spring-grip and chest-developer.

The electronic digit display dynamics meter regulator tool has overcome the defective of simple mechanical formula dynamics meter regulator tool in the past, has advantages such as directly perceived, accurate.Existing electronic digit display dynamics meter regulator tool, the electronic digit display type force meter applied on September 15th, 88 of the applicant for example, application number 88214118.X, generally form by beaer (such as the boxing support), sensor (a kind of resistance strain gage) and electronic digital display device, because mechanically deform, the creep of sensing element, the temperature of electronic devices and components floats, the time influence of factor such as float, make this class force meter have problems such as zero point drift, during use, must often adjust the electronic circuit part.This not only increases the trouble that apparatus is safeguarded, and influences measuring accuracy.Existing electronic digit display type force meter also exists and can not upgrade, keep dynamics tidemark, the application of force number of times in can not record unit time and can not add up defective such as dynamics numerical value.

The utility model is intended to overcome the above-mentioned defective of existing electronic digit display dynamics meter regulator tool, electronic digital display device is improved, adopt micro-computer technology, provide that a kind of function is complete, the micro-processor controlled electronic digit display dynamics meter regulator of good stability.

The utility model is to act on the power of beaer (such as boxing mechanism, grip mechanism, arm strength mechanism etc.), through sensor (a kind of resistance strain gage), be converted into electric signal, send microsystem by electronic circuit, by the program that designs in advance, after various computings, send display, show various data, as dynamics, application of force number of times, dynamics mxm., aggregate-value etc.

Technology contents of the present utility model is provided by embodiment and accompanying drawing thereof.

Fig. 1 is the complete machine principle of work block diagram of embodiment electronic digital display device.

Fig. 2 is foil gauge bridge circuit and an amplifying circuit schematic diagram in Fig. 1 block diagram.

Fig. 3 is multipath conversion and an A/D change-over circuit schematic diagram in Fig. 1 block diagram.

Fig. 4 is a computer system circuit schematic diagram in Fig. 1 block diagram.

Fig. 5 is a display circuit schematic diagram in Fig. 1 block diagram.

Fig. 6 is a power unit circuit diagram in Fig. 1 block diagram.

Present embodiment is an electronic digit display type force meter that comprises boxing, grip, three kinds of dynamics function of measuring of arm strength, by beaer (being respectively boxing support, grip and arm strength acting body), sensing element (resistance strain gage) and micro-processor controlled electronic digital display device.Beaer contacts with sensing element, when masterpiece is used for beaer, sensing element (resistance strain gage) is under the beaer effect, produce deformation, resistance changes, and is stressed big more, then change in resistance is severe more, the signal of this variation flows to micro-processor controlled electronic digit display circuit device through the foil gauge bridge circuit, and is treated, shows corresponding dynamics value or other function (for example application of force number of times, mxm. etc.) on charactron.Beaer generally is made up of power acting surface and flexible component, power effect mask body structure visual function is different and design (can be referring to the patent " electronic digit display type force meter " of the applicant's application, application number: 88214118.X, boxing mechanism with electronic digit display type boxing machine, application number: 89206327.0), here do not remake and be described in detail, below briefly describe micro-processor controlled electronic digital display device part in this force meter.This electronic digital display device is formed (see figure 1) by resistance strain gage bridge circuit (Sensor section), amplifying circuit, multichannel and A/D change-over circuit, microsystem, display circuit and power supply.Strain gage bridge route two sheet resistance foil gauge (ML) and resistance R ₁, R ₂Form, resistance strain gage is affixed on the resilient material two sides of beaer, the bridge circuit two ends preferably add burning voltage, resilient material stress deformation when beaer, be affixed on the also distortion thereupon of two sheet resistance foil gauges on the resilient material, resistance value changes, bridge circuit will produce a voltage signal, this signal send multi-channel conversion circuit after amplifying circuit amplifies, the A/D change-over circuit, microsystem control multipath conversion, the A/D change-over circuit, in turn three road signals are sampled, with A/D conversion, read the digital signal after the conversion then, carry out various computings.Before complete machine is not worked (before for example inserting coins), microcomputer then the benchmark of this signal that slowly changes as this road signal, send internal memory to preserve if three times record same value to a certain road signal continuously.When complete machine start working (after promptly inserting coins), the signal that this drive test is got deducts benchmark, just can obtain the signal of input action power, so just can eliminate effectively because mechanically deform, sensor creep, electronic devices and components temperature are floated, the time factor such as the float zero point drift that causes to the influence of measuring accuracy.(inserting coin of present embodiment after inserting coins, as the mode that starts complete machine), microsystem is to the sampling in turn at a high speed of each road (foil gauge bridge circuit and amplifying circuit) signal, when recording a certain road (for example boxing machine) signal greater than its benchmark, one-shot measurement begins And and continues to measure, if record signal, then replace last value, if then lose less than last value greater than last value, when recording signal and equal benchmark, then this time measure and finish, what preserve will be the mxm. of this measurement, its measured value as this time, by computing, send display to show.The internal memory of microsystem is also opened up a highest record district, it can be with each measured value with highest record relatively, if more than or equal to highest record, then as new record, replace old record with new record, then new record is sent display to show, this just reaches renewal, for several times the application of force and keep the function of tidemark.Microsystem can also start the internal timing circuit, measures application of force number of times within a certain period of time, through computing, send display to show, to reach measuring unit's application of force number of times in the time, microsystem can also add up each time measured value that records in timing, obtain total dynamics of the application of force.

Each composition of the system controlled by computer electronic digit display device of present embodiment is described in conjunction with the accompanying drawings.Illustrate before the foil gauge bridge circuit concrete structure that be omitted, amplifying circuit is by amplifier A here ₁, resistance R ₃, R ₄Form (see figure 2), its effect is after foil gauge bridge circuit input signal is amplified, to send multi-channel conversion circuit.As shown in Figure 1, present embodiment has three groups of foil gauge bridge circuits and amplifying circuit, Fig. 2 only draws one group, other two groups identical, be omitted, three groups are connected with three kinds of beaers respectively, are used for the signal input of boxing power, arm strength and grip, and this three-way output signal is sent the I of multi-channel conversion circuit (4051) respectively by system controlled by computer ₁, I ₂, I ₃Input end.Multi-channel conversion circuit and A/D change-over circuit as shown in Figure 3, by analog switch (4051), programmable timer counter (8253), d type flip flop (74), operational amplifier A ₄, comparer A ₅And gate circuit G ₁, stabilivolt D and some Resistor-Capacitor Units form, analog switch (4051) is as traffic pilot, other circuit is formed double integration A/D change-over circuit, wherein an A ₄, C ₁And R ₅(or R ₆, R ₇, R ₈By 4051 states decisions) form integrator, stabilivolt D and resistance R ₉, form stabilized voltage supply, as the reference power supply of double integrator.This A/D change-over circuit advantage is precision height (being up to 16 precision), (present embodiment is selected 10 precision for use to the speed height, the A/D slewing rate can reach per second 1000 times, speed makes measurement boxing speed become possibility like this), low (the general high-speed a/d converter of price, precision is more than 10, and price will hundreds of units, and this circuit elements device only needs more than 20 yuan).The microsystem (see figure 4) is made up of single-chip microcomputer (8031), program storage (2764), address latch (373) and crystal oscillator, Resistor-Capacitor Unit, and this is the minimum system of 8031 single-chip microcomputers.The work that single-chip microcomputer 8031 is scheduled to according to the program (establishment in advance) that exists in the program storage (2764), its major function is: (1) detects coin-in signal by middle fracture INTO; (2) by WR, RD, P ₂₇, A _C, A ₁And P ₀Mouthful, programmable timer counter (8253) is carried out read/write operation; (3) pass through P ₁₇, P ₁₆, P ₁₃The work of control multipath conversion A/D change-over circuit; (4) signal after the A/D conversion is carried out computing, in the hope of various data And these data are preserved, the benchmark ， And that comprise computing boxing power, grip, arm strength, boxing tidemark, boxing speed, accumulative total boxing power, obtains boxing power, grip, arm strength can be translated into displaying contents and show sign indicating number; (5) will show that sign indicating number send display to show by serializer RXD, TXD, the display circuit (see figure 5), form by shift register (164), LED charactron and light emitting diode, resistance etc., shift register is connected into series connection and forms, quantity visual function and deciding, the signal that the microcomputer serial mouth comes, by displacement, can deliver to each in 164 And by 164 through direct driving LED charactron of resistance and light emitting diode, light emitting diode be do prompting or the unit of display (as kilogram, inferior/second etc.) use.The power supply (see figure 6) is made up of transformer, three-terminal voltage-stabilizing source (7805,7105,7812) and bridge rectifier circuit etc., and among the figure, three groups+12V power supply uses for three groups of foil gauge bridge circuits respectively, and+5V power supply uses for other each circuit.

In sum, electronic digital display type ergograph, owing to adopt the micro-processor controlled electronic digital display device of said structure, solved null offset, temperature and the defective such as floated, improve the stability of apparatus, so that measure accurately, reduce the workload ， And that regulates maintenance and reduced the requirement of complete machine to mechanical part and sensor. This machine has also that function is many, displaying contents is abundant, low cost and other advantages, can be used as general dynamics exercising device, the outstanding suitable amusement appliance of doing.

Claims (2)

1, a kind of electronic digit display dynamics meter regulator, form by beaer, resistance strain gage and electronic digital display device, it is characterized in that electronic digital display device is a micro-processor controlled electronic digital display device, this device is made up of resistance strain gage bridge circuit, amplifying circuit, multichannel and A/D change-over circuit, microsystem, display circuit and power supply, strain gage bridge route two sheet resistance foil gauge (ML) and resistance R ₁, R ₂Form, resistance strain gage is affixed on the resilient material two sides of beaer, and amplifying circuit is by amplifier A ₁, resistance R ₃, R ₄Form, multi-channel conversion circuit is an analog switch, and the A/D change-over circuit is a double integration A/D change-over circuit, comprises programmable timer counter, d type flip flop, operational amplifier A ₄, comparer A, and gate circuit G ₁, stabilivolt D and some Resistor-Capacitor Units, microsystem is made up of single-chip microcomputer, program storage, address latch and crystal oscillator, Resistor-Capacitor Unit, display circuit is made up of shift register, LED charactron, light emitting diode, resistance.

2, electronic digit display dynamics meter regulator according to claim 1, its feature has three groups of foil gauge bridge circuits and amplifying circuit, three kinds of beaers, three groups of foil gauge bridge circuits are connected with three kinds of beaers respectively, and the I of multi-channel conversion circuit is sent in its three tunnel output respectively by system controlled by computer ₁, I ₂, I ₃Input end.

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