CN2049112U - Scintillative confluent frequency threshold value tester - Google Patents

Abstract

The utility model relates to a scintillative confluent frequency threshold value tester which belongs to a testing instrument of functions of a human body. The utility model is composed of a shell body, a control disc, a power supply and an electronic control circuit. The utility model is characterized in that the electronic control circuit is added with a random pulse generator circuit, an encoding display circuit, an encoding drive circuit of a scintillation screen, the scintillation screen and a frequency test pulse control generator circuit. The utility model can objectively test fatigue threshold values of a nervous system and muscles of the human body. The utility model is used for selecting special talents, such as athletes, pilots, etc.

Description

Scintillative confluent frequency threshold value tester

This utility model belongs to function of human body detecting instrument field, particularly belongs to the instrument field of refreshing smart system of human body and muscle fatigue threshold value.

Known to the inventor, be used for the human body function at present, particularly human body nervous system and the muscle flicker fusion frequency tester whether fatigue is used.Only doing flasher with a light emitting diode because of it can only detect with dark chamber; When measuring the flicker fusion threshold value, the flicker fusion upper threshold that can only rely on the measured to give an oral account to determine its people when can't see light source scintillation, this mensurations is leaned on measured's honesty fully and is lacked objectivity.Thereby can not be used to select athletes, talent with special skills such as pilot.

The purpose of this utility model is to provide a kind of flash of light that can detect the people objectively to melt the instrument of the photo threshold upper limit.

This instrument operation principle is on the variable frequency signal generator, controls one group of matrix combination luminescent device scintillation screen and does stroboscopic light sources, can carry out digital coding and the flicker of 0-9 at random to the matrix combination luminescent device of scintillation screen.To the digital identification of glistening, increased requirement by human eye, made the flicker fusion threshold value more can react the functional status of human central nervous system exactly the analytical judgment function aspects of brain.

This utility model is supervised the console panel that shows and handle instrument by housing, tester, and electronic control circuit three parts that drive instrument work are formed.

Accompanying drawing 1 is the block diagram of this instrument electronic control circuit.Remove during its constitutes power supply is arranged, variable frequency pulse-generator circuit (1), frequency dividing circuit (2), the time main pulse generator circuit (3), the time base frequency dividing circuit (4), flicker frequency counting display circuit (6) also comprise random pulse generator circuit (7), the display circuit (8) of encoding, random pulses decoding circuit (9) scintillation screen are encoded drive circuit (10), scintillation screen (11), frequency detecting clamp-pulse generator circuit (5).

This instrument, is widely used in the choice of talent with special skills such as athlete, pilot so the flashing rate that it can detect the people objectively merges threshold value because increased human eye to the digital identification mechanism that glimmers; The effect of the shade on the luminescence unit of this instrument scintillation screen can be tested it under conventional illumination, bring convenience to test job; Because the count pulse of flicker frequency counting display circuit is taken from frequency dividing circuit (2) before, and make its counting enabling nulse width equal the inverse of variable frequency divider ratio.The umber of pulse of under an enabling nulse effect, being passed through like this.Just equal the number of times of digital flicker in one second of scintillation screen, the high detection reaction speed of instrument that Here it is.

Concrete structure of the present utility model is provided by drawings and Examples.

Fig. 2 is variable frequency pulse generator and divider circuit schematic diagram;

Main pulse generator when Fig. 3 is, the time base frequency division, frequency detecting clamp-pulse generator circuit theory diagrams;

Fig. 4 flicker frequency counting, display circuit schematic diagram;

Fig. 5 is random pulse generator, random pulses decoding, coding display circuit schematic diagram.

Fig. 6 scintillation screen coding drive circuit schematic diagram;

Fig. 7 is a frequency detecting control impuls oscillogram.

Describe concrete formation of the present utility model and working condition in detail below in conjunction with accompanying drawing and embodiment.

The housing of this instrument adopts the rectangle casing of metallic plate or plastic plate; Scintillation screen (11) is set on end face of housing, console panel is contained on the other end with the rectangular housing of scintillation screen, console panel studs with inclined to one side sign indicating number display, flicker frequency count display, press button (12) circuit return-to-zero button, and flicker frequency is adjusted knob and on and off switch; Electronic control circuit all adopts the CMOS integrated circuit.The resistance-capacitance oscillator that variable frequency pulse-generator circuit (1) is made up of three phase inverter resistance, electric capacity constitutes, its surge frequency range is 5K-70KHZ, adjust the change that variable-resistance resistance realizes frequency of oscillation, the outfan of this circuit final stage phase inverter is connected with input (CP), flicker frequency counting display circuit (6) input (CU) of frequency dividing circuit (2) respectively by the B point, sends into pulse in the circuit respectively; Frequency dividing circuit (2) is 1000 frequency dividers that three grade of 10 frequency divider serial connection forms, and 10 inputs that the low-frequency pulse behind thousand frequency divisions is defeated by the flicker control gate of scintillation screen coding drive circuit (10) through frequency dividing circuit final stage outfan (QD) go to control the digital flicker frequency of scintillation screen (11); The time main pulse generator circuit (3) agitator formed by three phase inverter resistance, electric capacity and 4KC quartz crystal constitute, the input (CP) of base frequency dividing circuit (4) carried out frequency division when the pulse of its final stage inverter output output was defeated by.Time base frequency dividing circuit (4) is composed in series by M * 2 * 2 three a grade frequency divider, and two 2 frequency divisions of the back two-stage of this frequency dividing circuit are constant (QA, QB).And the M frequency division of the first order be by the time main pulse generator circuit the natural mode shape decision, the pulse width in the time of just must making the first order behind the base frequency division equals the inverse of the divider ratio of frequency dividing circuit (2).If time base frequency dividing circuit first order frequency division is M, the time main pulse generator circuit frequency of oscillation be F, the divider ratio of frequency dividing circuit is n, F=4000 in this circuit of M=2 (F)/(n) then, and the part-frequency point of three frequency dividers of n=1000M=8 (QC, QA, QB) divider ratio is 8,16,32; From the pulse input random pulse generator circuit (7) of time base frequency dividing circuit (4) final stage outfan (QB) output with door input (C), deliver to frequency detecting control generator circuit (5) respectively from the square-wave pulse signal of the 500HZ of time base frequency dividing circuit (4) QC point output with door x or door y and or a Z, again Z is delivered in the pulse of QA point 250HZ, simultaneously x and y are sent in this pulse after not gate p is anti-phase.At last again x, y, Z are delivered in the pulse of QB125HZ, through after these the combination, just formed TE, R, three kinds of control impuls of LE, its waveform adder relation is referring to Fig. 7.Wherein TE is the counting enabling nulse, and LE is for depositing the display sampling pulse, and R is the counter O reset pulse.Send into the corresponding input of flicker frequency counting display circuit (b) from the pulse (TE, LER) of frequency detecting clamp-pulse generator circuit (5) outfan output, this circuit is made up of the higher count display of integrated level, must import the control impuls of the pulse of variable frequency pulse-generator circuit (1) and frequency detecting clamp-pulse generator circuit (5) simultaneously, it just can finish the demonstration of flicker frequency.The random pulse generator circuit is made of flip and flop generator control and door (14) press button (12) control flip and flop generator (13) again, the effect of flip and flop generator prevents the push contact chatter, also can not add it, directly with press button control gate circuit, the pulse period of sending into door (14) from the C point is far smaller than closing time by people's pushbutton switch, and the time of the each pushbutton switch of people is impossible identical, thereby produced the random number effect.The input (CU) of input coding display circuit (9) and the input (Cp) of random pulses decoding circuit (9) simultaneously from the random pulse generator circuit and pulse door output from same point, the display circuit of encoding is made up of the higher count display of integrated level.When the needs coding shows, need only after the complete total zero clearing of machine, send into random pulses and get final product.Random pulses decoding circuit (9) adopts decimal scale counting/allotter.Make the random pulses number can be translated into the corresponding end of ten digit pulses of from 0 to 9 flicker control gate (14a) from 10 outfans input scintillation screens coding drive circuits (10) of correspondence, the flicker control gate is made up of the NAND gate of 10 and column position, imports by the digital coding door of forming with door (14b) from the pulse of flicker control gate output; The base stage of the luminescent device cell power driver of being made up of audion the pulse input of digital coding door output (14C) controls corresponding with it this digital luminescent device of forming of scintillation screen by transistor collector.The decoding position pulse signal that flicker control wave of sending here from frequency dividing circuit (2) A point and random pulses decoding circuit (9) D point are sent here acts on flicker control gate (14a) simultaneously, wherein with the corresponding position gate of random pulses number decoded signal effect downward swing door and make the flicker control wave pass through, afterwards this pulse signal just by with the corresponding digital coding door of this position gate (14b) act on the corresponding luminescent device cell power of this numeral driver (14C) in relevant unit.The flicker that the luminescent device of this random digit of composition just produces the pulse signal synchronised of sending here with the A point on scintillation screen (11).Scintillation screen is formed matrix group by light emitting diode and is closed flasher.Every light emitting diode all is with round shade, and the word height that light emitting diode is formed is 4Cm, the observer apart from the scintillation screen square from being that 100 to 120Cm flicker frequencies are 5-70HZ.The digital flashing mode of scintillation screen is for controlling the formula of going out, i.e. each luminescence unit device of whole scintillation screen is all luminous during no signal input; When the signal input was arranged, the numeral that then is encoded was periodically extinguished with selected flicker frequency.1.5 volts of rechargeable batteries of four joints are adopted in this electromechanics source, and the running voltage of supply circuit is 3 volts after voltage stabilizing.

Claims (2)

1, a kind of flicker fusion frequency threshold testing instrument, it is by housing, console panel, power supply, variable frequency pulse-generator circuit [1], frequency dividing circuit [2], the time main pulse generator circuit [3], time base frequency dividing circuit [4], flicker frequency counting display circuit [6] constitute, it is characterized in that:

Also comprise random pulse generator circuit [7], coding display circuit [8], random pulses decoding circuit [9], scintillation screen coding drive circuit [10] scintillation screen [11] in a, its formation; Frequency detecting clamp-pulse generator circuit [5];

Annexation between b, each circuit: the outfan of the final stage phase inverter of variable frequency pulse-generator circuit [1] is connected with flicker frequency counting display circuit [6] input (CU) with frequency dividing circuit [2] input (CP) respectively; Frequency dividing circuit [2] final stage outfan (QD) is connected with 10 inputs with the flicker control gate [14a] of scintillation screen coding drive circuit [10] side by side; The time main pulse generator circuit [3] the final stage inverter output be connected with the input (CP) of the input (CP) of time base frequency dividing circuit [4]; Time base frequency dividing circuit and outfan (QB) are connected with door input (C) with random pulse generator circuit [7]; Two other outfan (QC, QA) of time base frequency dividing circuit is connected with three inputs of frequency detecting clamp-pulse generator circuit [5] respectively with outfan (QB); The outfan of frequency detecting clamp-pulse generator circuit (R, LE, TE) is connected with the corresponding input of flicker frequency counting display circuit [6]; Random pulse generator circuit [7] outfan is connected with the input (CP) of coding display circuit [8] input (CU), random pulses decoding circuit [9] respectively; Corresponding with it 10 inputs of flicker control gate [14a] (0-9) in 10 outfans of random pulses decoding circuit and the scintillation screen coding drive circuit [10] are connected; The outfan of scintillation screen coding drive circuit is connected with the luminescence unit device of scintillation screen [11] respectively; Scintillation screen is formed matrix group by light emitting diode and is closed flasher, and every light emitting diode all is with shade, and power supply is connected with the each several part circuit, and electric energy is provided.

2,, be characterised in that the random pulse generator circuit is made of press button (12), flip and flop generator (13), gate circuit (14) by the described flicker fusion frequency threshold testing of claim 1 instrument; Press button control flip and flop generator is again by flip and flop generator control gate circuit.

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