RU82346U1 - RADIOACTIVITY INDICATOR - Google Patents

Abstract

A radioactivity indicator personal, containing a detector, an information display unit, an audible alarm, switches and a power source, a trigger, a microcontroller, a high voltage driver, a high voltage limiter, a voltage converter and a vibration motor, characterized in that two BETA detectors and an additional trigger are inserted into it, the keyboard output is connected to one of the inputs of the microcontroller, the trigger outputs through feedback are connected to other inputs of the microcontroller, the outputs of the BETA detectors are are connected to the trigger inputs, and the inputs of the BETA detectors are connected to the output of the high voltage limiter, the input of which is connected to the output of the voltage converter, the input of the voltage converter is connected to one of the outputs of the microcontroller, the individual outputs of the microcontroller are connected to the inputs of the information display units, vibration alarm and high voltage driver .

Description

The utility model relates to RADEX radioactivity indicators designed to detect and evaluate the level of ionizing radiation. The indicators are used to assess the level of radiation on the ground, in the premises and to assess the radioactive contamination of materials and products.

RADEX radioactivity indicators are designed for domestic use, therefore, users are not required to have knowledge in the field of dosimetry.

A known radioactivity indicator comprising a detector, an information display unit, an audible alarm, switches and a power source, contains a trigger, a microcontroller, a reprogrammable ROM, a high voltage driver, a voltage converter, a detector connected to a trigger input, a microcontroller output through a high voltage driver connected to the detector input , the switches are made in the form of a three-button keyboard, the outputs of which and the trigger output are connected to the inputs of the microcontroller, one of the output The microcontroller is connected to the trigger input, two outputs of the microcontroller are connected to the display and the firmware, three outputs of the microcontroller are connected to the display, one output of the microcontroller is connected to the firmware, one output of the microcontroller is connected to the bell, and another output to the vibrator. Patent of the Russian Federation for utility model No. 71000, IPC: G01T 1 / 02,2007.

A known household radioactivity indicator comprising a detector, an information display unit, an audio alarm, switches and a power source. The indicator contains a trigger, a microcontroller, a programmable ROM, a high voltage driver,

voltage converter and vibration motor, the detector is connected to the trigger input, the microcontroller output is connected to the detector input through the high-voltage driver, the switches are made in the form of a three-button keyboard, the outputs of which and the trigger output are connected to the inputs of the microcontroller, one of the outputs of the microcontroller is connected to the trigger input, two outputs the microcontroller is connected to the display and the firmware; the three outputs of the microcontroller are connected to the display; one output of the microcontroller is connected to the reprograms ROM, one output of the microcontroller is connected to the bell, and another output

- with a vibrator. Patent of the Russian Federation for utility model No. 71001. IPC: G01T 1/02, 2007.

A known personal radioactivity indicator, comprising a detector, an information display unit, an audible alarm, switches and a power source, contains a trigger, a microcontroller, a programmable ROM, a high voltage driver, a high voltage limiter, a voltage converter and a vibration motor, the detectors are connected to the trigger input, one of the outputs the microcontroller in series through a high-voltage driver and a high voltage limiter connected to the first and second detectors, the switches are made in the form of a three-button keyboard, the outputs of which and the trigger output are connected to the inputs of the microcontroller, one of the outputs of the microcontroller is connected to the trigger input, two outputs of the microcontroller are connected to the display and the firmware, three outputs of the microcontroller are connected to the display, one output of the microcontroller is connected to , one output of the microcontroller is connected to the bell, and another output

- with a vibrator. Patent of the Russian Federation for utility model No. 71002. IPC: G01T 1/02, 2007. Prototype.

A common disadvantage of the known utility models is the ability to assess the background radiation for large rooms, products and products.

This utility model relates to RADEX radioactivity indicators intended for use in conditions of potentially powerful ionizing radiation.

The radioactivity indicator has an extended range of readings, improved reproducibility of readings, decreasing to 1 second (with increasing dose rate) the time for obtaining results. Estimates the radiation environment by the value of the ambient equivalent dose rate Н * (10) of gamma radiation, taking into account x-ray radiation and contamination of objects with beta-particles sources.

The technical result of the utility model is reduced to 1 second (with increasing dose rate) time to obtain results, the use of system units of measurement of physical quantities - µSv / h, increased reproducibility of readings; enable / disable vibration; setting an alarm threshold, when exceeded, a signal sounds or a vibration signal is turned on; step (999 levels) change in the alarm threshold; introduction of an estimate of the dose rate of background radiation (in open areas); indication on the display of the value of the background dose rate; indication on the display of excess dose rate over background dose rate; the ability to work from one element.

The technical result is achieved by the fact that in the radioactivity indicator containing a detector, an information display unit, an audio alarm, switches and a power source, a trigger, a microcontroller, a high voltage driver, a high voltage limiter, a voltage converter and a vibration motor, two BETA detectors and an additional trigger are introduced, keyboard output connected

with the input of one of the inputs of the microcontroller, the outputs of the triggers are connected via feedback to other inputs of the microcontroller, the outputs of the BETA detectors are connected to the inputs of the triggers, and the inputs of the BETA detectors are connected to the output of the high voltage limiter, the input of which is connected to the output of the voltage converter, the input of the voltage converter is connected to one from the outputs of the microcontroller, the individual outputs of the microcontroller are connected to the inputs of the information display units, vibration alarm and high voltage driver yazheniya.

This RADEX RD1008 type radioactivity indicator is designed to simultaneously measure the power of the ambient dose equivalent of photon (gamma and x-ray) radiation, the flux density of beta particles and the ambient dose.

The essence of the utility model is illustrated in figure 1 and figure 2.

Figure 1 shows the block diagram of the indicator, where: 1 - Keyboard, 2 - Detector BETA-2, 3 - Trigger 1,4 - Detector BETA-2M, 5 - Trigger 2, 6 - High voltage limiter, 7 - Microcontroller, 8 - Backlit display, 9 - Vibration alarm unit, 10 - High voltage driver, 11 - Voltage converter (1.5 V to 3.4 V). Figure 2 presents a view of the front of the device. The radioactivity indicator works as follows. Press the “OFF” button of the keyboard 1. The voltage converter 11 from the voltage of 1.5 V of the battery generates a supply voltage of 3.4 V, after which the microcontroller 7 sends pulses to the high voltage driver 10, which, using the high voltage limiter 6, creates on detector 2 and detector - 4 operating voltage. Detector 2 registers gamma and beta particles, while detector 4 registers only gamma particles. As a result of exposure

of ionizing radiation at the output of detector 2 and detector 4, pulses appear which are fixed on trigger 3 and trigger 5. Microcontroller 7 processes the signals of triggers 3 and 5, counts the number of pulses received per measurement cycle from each detector 2 and 4. Each registered quantum is displayed on display 8 with the “■” icon. The blinking frequency of the “■” icon is proportional to the frequency of registration of pulses from triggers 3 and 5. The pulses received for the measurement cycle from trigger 5 correspond to gamma quanta, are averaged and displayed on display 8 as the dose rate of the ambient dose equivalent (hereinafter - the dose rate) and has dimension - μSv / h.

The pulses received from the trigger 5 for the whole time, the microcontroller 7 uses in calculating the value of the ambient dose (hereinafter the dose). The value of the ambient dose is displayed on display 8 when the button is pressed and have a dimension of μSv or mSv.

The pulses taken for the measurement cycle from trigger 3 correspond to gamma and beta radiation. Microprocessor 8 calculates the difference between the number of pulses from trigger 3 and the number of pulses from trigger 4 per measurement cycle, the difference averages and is used in calculating the value of the flux density according to the formula:

Where:

P is the beta particle flux density;

N is the difference between the number of pulses from trigger 3 and the number of pulses from trigger 4 per measurement cycle;

S is the active area of detector 2;

t is the measurement cycle time;

k is the beta radiation effect of detector 2.

The calculated beta-particle flux density is displayed on display 8 and has a dimension of 1 / (cm ² * min).

The microcontroller 8 performs the following functions: stabilizes the voltage at the detector 2 and detector 4 in the operating range; calculates the average power of the ambient equivalent dose of gamma radiation over an 8 measurement cycle; calculates the average value of beta particle flux density for 8 measurement cycles; in case of a sharp change in dose rate, the averaging cycle starts again; with a sharp change, the beta-particle flux density starts the averaging cycle again; changes the duration of the measurement cycle from 24 sec to 1 sec depending on the dose rate value;

sets and saves individual product settings.

Individual settings: setting an alarm threshold, when exceeded, a signal sounds or a vibration signal is turned on;

calculation of the value of dose rate and background flux density; indication on the display of the value of dose rate and background flux density; indication on the display of the excess of the ambient dose equivalent rate over the background dose rate; indication on the display of the excess of the beta-particles flux density value over the background beta-particles flux density value; enable / disable sound signal; enable / disable vibration.

The product has four operating modes: “MEASUREMENT”, “SEARCH”, “MENU” and “VERIFICATION”.

The “MEASUREMENT” mode is set automatically when the product is turned on. The “MEASUREMENT” mode has two options: measurement without taking into account the background and measurement with taking into account the background.

In the “MEASUREMENT” mode without taking into account the background, the dose rate of photon (gamma and x-ray) radiation, the flux density of beta particles and the dose are simultaneously measured and the first two readings are displayed. The time for measuring the dose rate varies from 24 to 1 sec and depends on the value of the power. The beta particle flux density measurement time is 20 seconds. The dose value is displayed on display 8 when the button is pressed.

In the “MEASUREMENT” mode, taking into account the background, the dose rate is measured, but not two readings (dose rate and beta-particle flux density) are displayed, but four at the same time are the excess of the dose rate over the background dose rate and the excess of beta-particle flux density above the background beta-particle flux density and two more values are the dose rate of the background and the background flux density.

The “MEASUREMENT” mode option is useful when radiation monitoring is required when accepting banknotes at Bank of Russia institutions and credit organizations.

In the “SEARCH” mode, the particles registered by the detector 2 and detector 4 are counted and the total number of pulses counted during the measurement is displayed. The “SEARCH” mode allows detecting a radiation source by changing the counting frequency of registered particles. The “SEARCH” mode should be used when searching for a source of radioactive infection.

In the "MENU" mode, you can set the "MEASUREMENT" or "SEARCH" mode, set the alarm threshold, enable one of the two options of the "MEASUREMENT" mode, evaluate the background, activate a call or vibration, set calibration coefficients. All individual settings made in the menu are saved even after the product is turned off.

The “VERIFICATION” mode allows you to quickly establish calibration coefficients when checking the product. Entrance to the “TEST” mode is protected by an access code.

Radioactivity Indicator: Allows simultaneous measurement of the dose rate of photon (gamma and x-ray) radiation and beta-particle flux density; reduces observation time with increasing dose rate; increases the number of cycles; measurement leads to an increase in the reliability of readings; estimates the dose rate of background radiation.

Claims (1)

A radioactivity indicator personal, containing a detector, an information display unit, an audible alarm, switches and a power source, a trigger, a microcontroller, a high voltage driver, a high voltage limiter, a voltage converter and a vibration motor, characterized in that two BETA detectors and an additional trigger are inserted into it, the keyboard output is connected to one of the inputs of the microcontroller, the trigger outputs are connected via feedback to other inputs of the microcontroller, the outputs of the BETA detectors are are connected to the trigger inputs, and the BETA inputs of the detectors are connected to the output of the high voltage limiter, the input of which is connected to the output of the voltage converter, the input of the voltage converter is connected to one of the outputs of the microcontroller, the individual outputs of the microcontroller are connected to the inputs of the information display units, vibration alarm and high voltage driver .