RU1830498C - Apparatus for a measurement of an ionizing radiation intensity - Google Patents

Description

code 9, generating pulses of 0.2 and sec duration, counting, sound and light indication unit 10 counting the pulses coming from the shaper 9, giving a sound signal after the count is completed and indicating the number of pulses passing through the detector 7, a timer 11, which generates a bus 12 at its output, after the appearance of a voltage on bus 5, a pulse lasting 39 seconds, allowing pulse counting by node 10.

The device operates as follows. When pressed, buttons 6 Measure at the output of the power switch 4, a high level of voltage is required for the power supply of the detector 7, imaging device 9, metering unit, audible light indication 10, timer 11.

Each ionizing particle alpha-yl to beta radiation, as well as particles of a natural background, which consists of a streamer component (mainly muons) of the cosmic background and the total flux of scattered gamma radiation due to the counter’s own background, scattered gamma radiation from the surrounding environment and industrial interference, the exciting detector causes a short discharge pulse in its circuit. Sooty pulses from the detector 7 are fed to the shaper 9, from the output of which pulses of about 0.2 ms duration are fed to the input of the node. Accounts, sound and light indicators 10, The measurement time is limited to thirty-nine seconds, for 39 s. Detector 7 with a natural radiation background forms 16 pulses. The result of the counting in decimal form shows the scoreboard of the counting unit, sound and light indication 10. Automatic power off is provided by the automatic power switch unit 4, which turns off the power of the device after A 2 seconds after pressing the Measurement button b.

Figure 2 shows the electric circuit of the automatic power switch 4. It consists of: a single-shot 14, which generates a positive voltage pulse with a duration of 42 sec at its output to bus 15; bus 13 — input of one-shots 14, the appearance of voltage on which triggers a single-shot 14; bus 3 - bus - power batteries 1; shmna2 - bus +. batteries 1; bus 5 - output of the automatic power switch; transistor 16.

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The automatic power switch 4 operates as follows: When the Measurement button 6 is pressed on the bus 13, the battery 1 is energized, which triggers the single-shot .14 and a positive voltage appears on its bus 15, which is applied to the base of the transistor 16 assembled by circuit of the follower repeater. This causes a voltage to appear on the bus 5, which is applied to the elements of the device. After 42 seconds, a low voltage level appears on the bus 15 of the one-shot 14, which causes the voltage to drop on the bus 5 and such immediately the appliance stops working

.. The expected economic benefit from the use of a device for measuring the intensity of ionizing radiation is to increase the service life of the device by approximately 1.5 times compared with the prototype. This is made possible by the introduction of a power switch to the Measure button. With the introduction of a circuit breaker and a measurement button, the power supply is automatically turned off, which significantly saves the power of the power supply battery. For m 1.1 1.1 Sample The device for measuring the intensity of ionizing radiation, containing a detector, a shaper n pulses, counter, timer and battery, the negative bus of which is connected to the power bus of the detector, .. pulse shaper, counter and timer, the output of the detector is connected to the first input of the shaper, the output of which is It is connected to the first input of the counter, the second input of which is connected to the output of the timer, which means that, in order to increase the energy efficiency of the energy consumption, it is equipped with a two-pin switch and a siphon switch, consisting of a single-shot and a transistor made according to the emitter repeater circuit, the emitter of which is connected to the inputs of the timer, detector, the second input of the pulse former and the third input of the counter, the first and second inputs of the same vibrator are connected respectively to the collector of the transistor to the normally open contact of the dual-switch, a normally closed contact which is associated with both positive battery supply rails and the power circuit breaker and the negative bus last is connected to the negative battery bus.

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FIG. 2