SU563966A1 - Device for measuring oxygen consumption - Google Patents

Description

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The invention relates to laboratory equipment for measuring oxygen consumption by laboratory animals and can be used in experimental medicine and biology in conducting research in the field of normal and pathological physiology, pharmacology, toxicology, hygiene and ecology.

The closest to the invention to the technical essence and the achieved result is the known device for measuring oxygen consumption, containing a thermostatically sealed chamber absorbers of carbon dioxide and water vapor, an oxygen stabilization system with electromagnetic valves and a temperature compensator, a manometric oxygen consumption sensor, a program control unit and digital meter with pulse counter and printing mechanism

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However, such a device does not allow for measuring with high accuracy small values of T1 for oxygen consumption by laboratory animals,

The aim of the invention is to provide a measurement with high accuracy of small quantities of oxygen consumption by laboratory animals.

This is achieved by the fact that the device for measuring oxygen consumption is equipped with a standard-frequency pulse generator, an electromagnetic relay unit containing a starting, control and two intermediate relays, and a mode switch, and the oxygen-gauge oxygen sensor is made with movable contacts frequency is connected to a pulse counter through the starting and control relays, the gauge oxygen consumption sensor is connected via intermediate relays, and the switch Tel modes of operation and a pulse counter unit communication with Zan {yn Applications with software,

The drawing shows a diagram of a device for measuring oxygen consumption.

The device contains a thermostatically controlled hermetic chamber, absorbers of carbon dioxide and water vapor, the oxygen stagnation system 13;: PPN with 1 in 1-STO liaugor (in the drawing, on the front panel and in the radiator valve 1 and 2; 3 Kncjjopc ija consumer with a fixed, 4 d contact and 5 5 and 6 pins, a program control unit 7 and 4) H3M6piFrenb bi are shown with a counter of 8 emulsions: a pechagoshy mechanic (not shown).

Pressure gauge data consumption 3

oxygen libisvoine-i vpdoI ..- obaenoy ki, filled with an egtikrolt-a and reported odpn: 1 .sigigol with vugrenpey part of thermostrans--,:: ni rep -ei-ion-ioii 5

chambers, and shch ugp1-l - the city of tch-; p; an eye, a Geisator, placed, Biij t-rpte; r№, osgatruyukyu 11 hermetic kemer,

KoitaA s 5 in O h-tyumst ;; Ch1 geskogo aag chsusa 3 consumer; s-yts- yuroma performed20

with the possibility of re; ug2ki io vertnkapn, 4VO povo-et peryJOTpoi-Q / b with oxygen. Yes, the consumption time of the co-1 is replenished.

5crpoiiCTBo also includes a generator of 925 standard frequency pulses, an electromagnetic relay unit, and a switch for 10 operating modes. The electromagnetic relay unit consists of the starting relay 11 of the controlling relay 12 and two intermediate relays30, the relay 13 and 14.

Substance 1 No.-, those contacts 5 and 6 of the manometric sensor 3 of the oxygen consumption are included in the circuits of the rectifying bridges 15 and 16, in the diagonal of which intermediary relays 13 and 14 are included. Bridges 15 and 16 through contacts 4.5 and 4.6 connect with power supply transformer 17.

Pins P 1 and P 2 of intermediate relays 13 and 14 are included in control relay 12, and P 3 contacts of control relay 12 and P 4 of starting relay 11 are connected to solenoid valves 1 and 45 for supplying oxygen to the chamber.

Starting relay. 11 through own. P4 contacts and control relay contacts. the relay 12 is connected to the circuit through the switch 10 of the work resolution, which is controlled by the software control block 7, the latter is connected to the generator of 9 standard frequency pulses, which is connected via contacts P4 and RZ of the starting and control relays 11 and 12 G; pulses, also connected to the software control side 7.

Transformer 18 is used to power the solenoid valves 1 and 2, control & 12 and start relays 11 to 60

a rectifier bridge 19, connected to transformer 18.

The device works as follows. With the open position of the switch 10 operating modes in the chamber, a constant pressure is maintained, since when the pressure decreases due to the oxygen consumption of animals, the electrolyte in the U-shaped tube of the oxygen consumption gauge sensor 3 closes contacts 4 and 5, which causes the intermediate relay 13 to operate, through the closing contact of which the control relay 12 is turned on, and through the closing contact of the latter, solenoid valves 1 and 2 are activated, which supply oxygen to the chamber.

When enabled, the program control unit 7, in accordance with a predetermined program, outputs signals to the switch 10 operating modes and simultaneously turns on the counter 8 pulses.

The switch 10 modes of operation includes a starting relay 11 through its contact, while the opening contact of the starting relay turns off the solenoid valves 1 and 2, blocking the supply of oxygen to the chamber. When electrolyte closes contacts 4 and 5, the intermediate relay 13 is turned on and through its closing contact, the control relay 12, the pulses from the generator 9 standard frequency pulses arrive at the counter 8 through the flashing contacts, P1 and P2 of the control turnip 12 and the starting relay 11. pulses. As valves 1 and 2 are blocked, the pressure in the chamber continues to decrease due to the consumption of oxygen by the animals. With a corresponding increase in the electrolyte level in the manometric sensor 3 of oxygen consumption, contacts 4 and 6 are closed, triggered by an intermediate relay 14, which opens the control switch P5 through relay 12, which opens its own. contact in the circuit connecting the counter of 8 pulses and the generator 9 pulses of standard frequencies. Pulse arrival c. The generator 9 to the counter 8 is stopped, and the program control unit 7 outputs the result of the counting to the printing mechanism, resetting the readings of the counter 8 and mycove and simultaneously turning the switch 1O on the operation modes. When the latter is turned off, the starting relay 11 is turned off and the contact P4 turns on the intermediate relay 14, which turns on the control relay 12. The electromagnetic valves 1 and 2 are turned on through the closing relay contact of the control relay 12 and oxygen is supplied to the chamber until

the electrolyte will not open contact 5, after which the system returns to its original state.

If the operation mode switch 10 is turned on when contacts 4 and 5 are closed with electrolyte and, consequently, control relay 12 is turned on, the last opening contact of the relay will disconnect the starting relay 11, which can be turned on only after electrolyte, having previously opened the contacts 4 and 5, then closes them again.

Thus, the countdown of the consumption time of a given oxygen target when the operation mode switch 10 is turned on always starts at the moment of electrolyte closure of contacts 4 and 5 and stops at the time of electrolyte closure of contacts 4 and 6, which ensures high accuracy of measurement. The amount of oxygen consumed, the time of consumption of which is measured, depends on the distance between the contacts established by the experimenter after preliminary calibration.

The described device for measuring oxygen consumption compared to the known one provides high accuracy. measurements of small quantities of oxygen consumed by laboratory animals and automatic recording of measurement results in digital form, which significantly improves performance when carrying out relevant experiments, as it allows the experiment to be conducted in parallel on several animals and at the same time reduces the duration of subsequent processing of the results obtained.

The economic effect of using the invention is expressed in saving time and the number of workers involved in conducting aKcnepiiNOHTa and processing its results.

Claims (1)

1. Copyright certificate № 51276O kl. A 61 B 5/08, published 1976 IS From thermo compensator ID, f4. -Vc W. L7 0 & J Res if t re t 13 220 g