SU697833A1 - Vibration-type batchmeter - Google Patents

Description

RS: SW-METER

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r, the indicator is extremely, limit indicator: connected to the alarm device. In addition; Brodosi; .Met equipped with a block core; ,;) 3fci L1i} P; l.; And 11, INPUTS OF WHICH SOE0 v.chgch Kii; cNjiisaTopa frequency scatter. .Q ..:. : i,; i, -, i: K ;; T (; pON; zaias time 11; oXX L with go; yom indicator

IG, and the block diagram of the proposal is n; bp; o and; stpa; in fig. 2 - wa .. .. i;. :; v.uj of the block diagram is correct, the alarm indicator 1-m; -,. sensor 2 vibrations,: connect ;; cupcakes with him block

Claims (2)

C (gobout signaling; ;; ;; e:; aE from a different cascade 3;; | p - with an indicator of 7 mg dose:;,; - rum 8 at the output. Dati;:, ech: Y: G., the respective. Each civ..ni: e: i with inputs corresponding.; - h) bl () b: a gain. r .. i - ln 1 signals, indie ;: R - :. l: uh and BLOCK 10 Kor (, l icoa) pcfo is additionally connected to the output of the indicator 9, and its output is connected to the input of the indicator 9. The input of the indicator 9 is additionally connected to the output of the integrator 6, and the output to the signaling device 1. Block 10 contains a comparator 11 with an additional input 12 and a key 13 at the exit, the additional comparator 14 with a key 15 at the exit, additional , integrator 16, having serially connected with keys 13, 15, input 17, and a functional converter 18 at the output, connected to the indicator 9 of the time margin. The vibration meter works as follows. Vibrations of an object (workplace, hand tool, process equipment) that is in contact with a person are converted into electrical signals in a three-component vibration sensor. Each of the signals is frequency weighted in cascades 3, 4, 5 of the gain and frequency weighting block in accordance with sanitary standards for each of the three orthogonal directions. Next, the signals are summed in the adder 8 and integrated in the integrator 6. From the integrator 6, the signal enters the indicators 7 and 9. The dose adjustment unit 10 starts to work when the signal level at the output of the adder 8 does not exceed a fixed threshold level determined by the human vibration sensitivity threshold During these periods, the physiological functions of a person are restored, as a result of which it is generally acceptable that the duration of exposure to vibrations increases. The signal from adder 8 is compared by a comparator 11 with a constant reference voltage transmitted by pa to input 12. In case the signal level from adder 8 is less than the constant reference voltage at input 12, a switch 13 is opened, controlled by comparator 11. If the signals arriving at indicator 9 from blocks b and 10 are equal to each other, but opposite in sign, the comparator 14 is triggered and closes key 15. With open keys 13 and 15, the constant voltage from input 17 goes to an additional integrator 16, and then to functional conversion Spruce 18, from the output of which the voltage goes to the indicator 9 of the time margin. Thus, the voltage generated by the dose adjustment unit 10 is proportional to the time interval during which the signal level from the adder 8 remains lower than the voltage level applied to input 12 and corresponding to the human vibration sensitivity threshold. Block 10 dose adjustment works in the same way and with a zero signal from the adder 8, corresponding to a break in the action of vibration. The functional transducer 18 forms a predetermined dependence of the recovery functions of the body on the break time. Thus, the technical capabilities of the vibro-dosimeter are expanded and the accuracy of the assessment of the biological effect of vibrations is improved, by taking into account the restoration of body functions. The use of a vibrodosimeter provides the ability to continuously monitor the vibration effect on a person, which helps prevent a person from receiving such doses of vibration, which can lead to a decrease in labor efficiency and occupational diseases, makes it possible to rationally organize labor under conditions of vibration, to monitor the technical condition the use of machines and mechanisms and evaluate the effectiveness of systems. Claim 1. Vibrodosimeter containing a limit time signaling device, a vibration sensor, a signal amplification and frequency weighing unit connected in series with it and an integrator with an output dose vibration indicator, characterized in that, in order to expand the technical capabilities, the vibration sensor is made of a three component vibration meter. equipped with an adder of frequency-weighted signals and an indicator of time reserve, while the inputs of the adder are connected to the outputs of the gain and frequency weighting unit, its output - to the input of the integrator, whose output is connected to a dose indicator and indicator time limit and time limit indicator input coupled to the signal transmitter. 2. Vibrodosimetr p. 1, characterized in that, in order to improve the accuracy of dose measurement, it is equipped with a vibration dose adjustment unit, the inputs of which are connected to the outputs of the frequency-weighted adder and the time indicator, and its output is connected to the input of the time indicator. Sources of information taken into account in the examination 1. US Patent No. 3802535, cl. 181-5, 1974 (prototype). L Fig.}