SU696398A1 - Device for warning about excess of ionizing radiation dose threshold - Google Patents

Description

BToptiMH inputs of the first trigger and the coincidence circuit, the trigger output is connected to the second key input, and the output of the conversion node is connected to the second JTPM input of the second trigger, the output of which is connected to one of the waiting multivibrator inputs that are connected to the second input.

The block diagram of the ionizing radiation dose threshold alarm device shown in the drawing is held by detector 1, counting device 2, storage device 3, recalculation unit 4, alarm 5, driver 6, coincidence circuit 7, triggers 8 and 9, waiting multivibrator 10 and key 11 .

The operation of the device is as follows.

In the initial state, trigger 9 blocks the waiting multivibrator 10. Pulses from detector 1 are fed to the input of counting device 2, which generates a signal when each dose threshold is reached. This signal is fed to the input of the storage device 3, which counts it, and to the driver B, which generates a pulse arriving at the triggers 8, 9 and the coincidence circuit 7. The pulse from the driver 6 flips the triggers 8 and 9, as a result of which the key 11 is blocked , and a lock is released from the waiting for the Multivibrator 10 and it starts to pass signals from detector 1 counted by memory 3 and scaling node 4. Since the key is block 11, these signals do not pass to the alarm indicator 5. Scaling factors storage device 3 and the conversion unit 4 are equal to each other and equal to the number h dose thresholds. As soon as the waiting multivibrator 10 skips li pulses, the recalculation node 4 will generate a signal that flips trigger 9, which again locks the waiting multivibrator 10. After it arrives from the waiting multivibrator 10 And the pulses, the memory 3 changes to the same state as it did before pulses from the standby multivibrator 10. If memory device 3 counted 6 thresholds, then before entering from the standby multivibrator 10 (n-e) - that pulse, trigger 8 blocks key 11, and after (h e) -th pulse trig ep 8 perebrasyvaets and opens switch 11, which passes on the alarm 5 remaining n - (n-E) E pulse B result in excess of 6-dose alarm threshold will give € signals.

After reaching the dose limit value, the signal from the counting device 2 enters the filled memory 3 and returns it to the initial state, as a result of which the pulse at the output of the counting device 3 coincides in time with the shaping pulse 6. This coincidence is highlighted by the coincidence circuit 7, which provides a continuous signal to the detector 5.

Such an embodiment of the device allows not only to warn personnel about exceeding the threshold. A dose, but also simultaneously provides information about the dose value.

The advantage of the device is the ease of dose assessment by the operator and, in practice, the absence of error in the dose estimate. The operator does not need to detach from his main job.

These circumstances, firstly, improve safety techniques, and secondly, have a favorable psychological effect on the operator, which, in turn, affects the increase in staff productivity. five

Claims (1)

01. Dosimeter-detector 2P-11 OD. Catalog of the company National Ponasomc 1975. 2, Rem Master HPM-l dosimeter-detector, Fuji 3r 9tf-u Tients 1975 catalog (prototype).