SU581478A1 - Method of recording pneumatic signals - Google Patents

Description

(54) METHOD FOR REGISTRATION OF PNEUMATIC SIGNALS

one

The invention relates to the field of pneumatic automatics and concerns, in particular, a stream of & no ink recording of signals.

Recording methods are known that are commercially available in commercially available pneumatic pen recorders. Instruments of this type contain a cypophonic measuring mechanism and a unit for supplying a dye liquid, including a reservoir with a liquid and a CBS associated with a reservoir with a capillary tube ij.

The disadvantage of these recording methods is that their low speed is due to the inertia of the controls.

Besides. Additional amplifying devices are required to record low pressure signals.

Closest to the proposed method of detecting pneumatic signals is the method of supplying UNDER pressure of a jet of dye and deflecting the jet with a recorded signal.

U.

The disadvantages of this method are its low sensitivity and width dependence.

of the resulting print from the absorption of the dye into the material of the recording medium. With this method of recording, the recorded pressure is difficult, since additional special devices are required to record the density of the imprint of the dye liquid on the instrument diagram.

The aim of the invention is to increase the sensitivity of the proposed method.

This goal is achieved by splitting a jet of a dye liquid into a uniform droplet with a pulsating pneumatic signal before its deflection and fixes it on a moving diagram, which makes it possible to increase the sensitivity of the droplet jet to small deflecting signals and at the same time increase the registration accuracy.

FIG. 1 shows schematically the registration of discrete signals; in fig. 2 - an example of the registration of analog signals.

Claims (2)

The device comprises a pressure reservoir 1 for ink with a nozzle 2, a pneumatic oscillator 3 with an output nozzle 4, a drain receiver 5, a control nozzle 6 through which the recorded sial is fed. The recording of discrete pneumatic signals is performed as follows. A liquid jet (see Fig. Flows under pressure from the pressure tank 1 through the nozzle 2 (diameter of the flow section & NIN is about 0.15-0.2 mm /. Impressed air pulses are generated by a pneumatic oscillator 3, and from the nozzle 4 periodically an air stream flows out, due to which liquid parts are removed from the liquid in the drain receiver 5. The remaining liquid particles form uniformly droplets used for aaniic B. Registered pneumatic impulses enter the fluid deflection control channel. The measured value of the recorded signal is all liquid, flowing into the pressure tank 1, naphkl, equals the drain receiver 5. At a zero value of the recorded signal, the droplets formed fall on the chart tape, and the write-signal is recorded.This discrete signal recording circuit splits the jet of liquid into The drops are carried out with the purpose of reducing the liquid flow to the recording. The required value of this flow rate is determined by replacing the duty ratio of the pulses generated by the pneumatic generator 3 minutes in the case of recording analog signals (see. FIG. 2) the nozzle 6 is supplied with $ g, which is measured by continuously changing its pressure. A jet of air flowing out of the nozzle 6, the droplets obtained with the elements 1, 2, 3, 44 deviate by a value proportional to the recorded pressure. In the considered circuits, aaapi signals (Figs. 1, 2} can similarly use a pneumatic oscillator with a mechanical shut-off device containing a plate that oscillates across the movement of the jet, and due to the hole in the plate, the jet breaks droplets. Working schemes of jet-drip devices for recording pneumatic signals also contain means for automatically returning a liquid that was not used during the formation of droplets from a drain Era 5 in the pressure tank 1 (see Figs. 1, 2). This allows you to significantly increase the flow rate of the continuous operation of the recording device without increasing its size, Comrade. The technical and economic efficiency of the proposed registration method is determined by the fact that it provides non-contact recording low gas pressures without converting the recorded signals with the help of special sensors to higher pressure signals or electric power lines. The elements of the measurement circuit of the recorded gas pressure do not contain mechanical ones. mobile Peteypeys, i have high speed, and are easy to manufacture | "1. An experimental test carried out by the authors of the proposed registration method showed that a satisfactory recording quality of signals can be obtained at relatively low operating pressures of the liquid (about 0 atm, 2 atm) and relatively large diameters of the bore section of the pressure chamber (O, 15 -O, 2O mm). The proposed methods of forming single-shot Kpacstmeft liquid drops for recording signals eliminate the need to use special electrical equipment in jet-drop recording devices. Claim Invention Sposs Pneumatic Recording CHIV. In order to increase the sensitivity, the jet of the red liquid is divided into homogeneous droplets with a pulsating pneumatic signal and fixed on the moving diagram before its deviation. Sources of information received during the examination: 1. Pneumatic devices Start, Catalog of the Tipribor plant. M., 1967, p. 559. 2. US patent number 3719952, class. 34675, 1973. 9ut.Z