DE2214959A1 - Simulated radioactivity monitoring system - Google Patents

Description

DR. MULLER-BORJ = DIPL.-PHYS. DR. MANITZ DIPL-CHEM. DR. DEUFEL DIPL-ING. FINSTERWALD DIPL-ING. GRAMKOW

PATENT AGENCIES $ 221495

27. HRZ. 1372

Munich, the

We / Obd - M 2 t 62

THE 1 / IaRGC ¹ NI GOMPAHY .LIMITjSD

• Marconi House, New Street Chelmsford, j3ssex ,. England

Simulated radio activity monitoring sys; fcem.

The invention relates to a simulated radioactivity monitoring chung3 system. ■. '

To staff in handling radioactive! Ty-IJeßinatrumenten to sciiulen ode-r radioactivity-ÜberwaGiiungsgeräten, it is wünsoiienswert offensicntlich perform an exercise "the so realistic N ± e möglich'ist." Regardless of whether the Toggle

209842/0794

the situation taken concerns the aftermath of a nuclear attack, in which a considerable floor area is affected, was drawn that was the extent of a larger stretch of land; or whether it is an accident, in which Nuclear material is involved, with only a relatively narrowly limited area being affected.

According to the invention, an arrangement or a üystsm is to be created with which a realistic exercise can be carried out «

The subject of the invention is a simulated radioactivity monitoring system for staff training, characterized in that ' a variety of field instruments are provided, each of which * - des is able to provide an indication of the radiation intensity represents when there is a data signal from an Easissstion receives that further in a jsinrichtung for geographical Localization of each instrument is available and that a facility is provided at the base station to access each instrument to transmit a data signal which represents the assumed radiation level at the location of this instrument.

An advantageous further development of the invention provides that each instrument is a known radiation measuring or radiation monitoring instrument in which the normal radiation measuring or radiation monitoring circuits are replaced by electronic circuits which are able to use the signal addressed by the Basrf, gustation to this instrument and to use the data supplied from there to provide the operating personnel with a display that is representative of the radiation level which is similar to the display which would be delivered by this instrument in a realistic 3itiiation.

Preferably 13t further provided that two 'daughter stations are provided for the localization of the field instrument, which % m

209842/0794

"They are located both from each other and from the iSasisstation can be arranged that the field instruments are each equipped with a device for transmitting a response signal are, 'which is then sent out when that from the base station received signal addressed to the respective instrument is that the toohter stations are designed in such a way that they receive such response signals and the same to the .Basisstation further transmitted that still at the base station a Facility is in place to show the position of an instrument in Depending on the time of arrival of the corresponding signals to be determined, which were further transmitted by each transponder.

According to a further advantageous development of the invention it is provided that the last-mentioned device at the base station comprises a device for one of a field instrument to receive transmitted response signal directly *

Another preferred embodiment of the invention is characterized They are characterized by the fact that a field instrument is designed in such a way that that-there are usually alpha, beta and / or X-rays receives and that a facility is provided- to the size to modify the display, which in response to the data supplied received by the base station, depending on the distance the instrument is from the area assumed to be contaminated.

It is preferably provided that the last-mentioned device is a. Capacitor which is arranged to be charged to a level determined by the data received from the base station ¹ and that it is discharged during a time determined by the distance the instrument is from the area separates.

, It is also preferably provided that the device ζ To determine the distance the instrument is from the plane

BATH ORIGINAL

before separates, has an ultrasonic sonar arrangement that the Capacitor is arranged such that it is disconnected from the charging source and connected to a discharge path when the Sonar arrangement emits an ultrasonic pulse to the area that it is separated from this Sntladepfad and with a display device is connected when the ultrasonic pulse reflected from the surface is scanned and that it is again connected to the charging source connected before another ultrasonic pulse is added the surface is transferred.

According to a further preferred embodiment it is provided that the display device is an analog memory circuit which is connected in such a way that it is a measuring device and / or a feeds acoustic display device.

It is furthermore preferably provided that the acoustic display device is a noise generator which comprises a sound source and a device which has a monostable circuit to combine output noise signals from the sound source with the signals za which are stored in the analog memory circuit.

The invention is explained below, for example, with reference to the drawing described in this shows:

Figure 1 is a schematic block diagram of a simulated radioactivity monitoring system according to the invention,

FIG. 2 is a schematic block diagram of an im. System of the figure 1 used field instrument and

Figure. 3 explanatory diagrams relating to the circuit of the Figure 2 refer to.

209 84 2/079

The system shown in FIG. 1 "ordered from a base station, which in the system shown with dashed lines Block 1 is included, continues to consist of two 'l'daughter-Wiederhölsta-' functions A and 3 and from a large number of field instruments that are carried by the staff and of which only "one" is shown at 2 is. The base station 1, the 'l'oohter repeat station A and the lower repetition station B are geographically approximately at the JjJ c kp points of a triangle, with an area within the triangle in which a nuclear defense * - exercise to be performed.

Each instrument 2 which, with reference to figure 2 in Definitions is explained consists of a known conventional borrowed radiation detector and / or ^ measuring instrument, its Radiation detector components have been removed and replaced by electronic Circuits are replaced that

a) one transmitted to the circuit by a base signal and receive a signal "addressed" to the circuit by means of a code,

b) respond by a response signal which is sent by the child repeaters A and B and from the base station 1 aufgenom-.men can be used to be used after retransmission «· The Toohter repeater stations run through to the base stowage the base station to the i-Osioion of the special ii'eldinstrumeiites determine, ■

c) Another signal received from the base station, soft the predicted level of radiation intensity at that position angiot uiid provide an indication or an answer which of those is similar to that provided by the special tfeldinstrument • Could if the radiation intensity is actually this level would have.

2Q98U / Q7Ö4

22U959

The basic taxation consists of a central / processing unit 3, which is a computer or a patent processing system has, and an associated peripheral en unit 4. The peripheral üdnheiο 4 is arranged in such a way that they output signals via a serial converter 5 to a data transmission device 6 supplies. The data transmission b i3t ao arranged to send signals from base station 1 to the Jj'eldins door to ducks. 2 transmits. The central / processing unit 3 is programmed in such a way that it polls every word of dins dream 2 cyclically, using an address code that is unique to each In - * .. ·. Instrument individually different iso. idn. jjmpi longer 7 is 0 so designed that it receives response signals from an xOchter-.riederholstaxion A receives and those received! Signals of the peripheral ^ Unit 4 feeds, young receiver 8 is trained to last Receives response signals from the ιό enter repeater B and supplies such signals to the peripheral unit 4. A primary recipient. 9 is designed in such a way that it can be removed from the FeldinsüromenOen 2 receives transmitted signals directly. The time difference between the arrival of a given response signal, which is transmitted by a given signal instrument, to each the three receivers 7> Ö and 9, is used by the recuner to determine the position of the field instrument in question.

Using the position information obtained in this way the central processing unit 3 turns to the serial converter 5> in order to send a signal to the field instrument 2 via the data transmission device 6 for the addressed time transmitted, which is the predicted level of radiation intensity for this position for practice purposes. These data signals are received by the field instrument 2 and are converted into an appropriate The display has been transformed as it is normally displayed by the field instrument in operation.

09842/070 ^

As far as a participant in an exercise is met, behaves Its I »el dins door ent just as if it were used in normal operation were. When using many instruments; can be all necessary electronic circuitry including the power supply can be accommodated in the housing, and an antenna (for example a half-wave dipole) can be inserted in the side of the Instrument or in the handle. Where this is not possible is, the participant can wear an arrangement, which such Contains parts that cannot easily be accommodated within the housing. ''

In the case of instruments, usually a logarithmic Would have a scale (for example a so-called portable dose rate instrument), is the central processing unit appropriately programmed to the appropriate logarithmic Perform conversion so that linear decoding can be used on the instrument.

Storage is normally possible in the instrument. If in reality such an instrument is used which has switched areas (for example switchable areas) Decoding areas as in a teaching instrument), the Store the form of a register containing the full field information that was received by the base station. The Eereiehsscüalter of the instrument is then arranged so that the reading of a suitable part of the register is controllable.

In view of an enlightened realism, it is desirable da.3 the displays of such instruments, which in V. are used to measure alpha, 3eta and X-rays, which are relatively strongly attenuated in the loft and change depending on which color the instrument is exposed to from the contaminated .. Source, for example the height of the instrument across your floor in one exercise. in which a v <atomic attack

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Is accepted. This feature is particularly desirable when During the exercise it is assumed that an accident has occurred in which core materials are involved and those in "'" stand Distance is the distance between the instrument and the suspected contaminated vehicle or other piece of equipment is. To achieve this feature, a capacitive distance probe can be built in, and the change in the .capacity with the ob; j ice distance, which is represented by it is used in any known manner to control the level of the signal supplied to the meter. The change in capacitance can be used, for example, to change the frequency of an oscillator and the output signal a frequency-sensitive circuit, which is fed with vibrations from the oscillator, is used to generate a controllable attenuator. Alternatively, can an oscillator of constant ^ requeriz of a capacitive bridge scarf tion, with the capacity in one branch of the bridge the distance probe is arranged to the required Derive control signal.

In many cases, however, is an ultra-sonic distance measuring arrangement most satisfactory, and in the vät uses that below field instrument described with reference to FIG eii.e such an arrangement.

According to Fi ^ ur 2, an address code detector 10 is provided to the Address code to recognize which one is for the field instrument in x> ' is typical and transmitted through the lassissta oion and received by the antenna 11 v. j.rd. The iiaressenkode-jyetektor 10 is switched so that it triggers a response signal transmitter 12, but which antenna 15 (in the jr'raxiü the antennae 11 and 13 would be common) sends out the response signal, -what according to the description above from the ..: asisstation is used to determine the posiuior of the i-elair.-s dream to determine it. The address ^ detector 1C is also

2098Λ2 / 079Λ

switched so that it opens a gate 15 via a delay circuit 14 to enable those data signals which are next to be sent out by the base station to be fed to the receiving circuit 16. The delay caused by the delay circuit 14 is sufficient to prevent the gate 15 from being opened before the response signal has been sent by the response signal transmitter 12. The receiving circuit 16 is provided with a density holding register 17 is connected, in welcnem. data on the Ϊ ¹ eldstrahlungsstärke overall _r stores are. the Aasgangssignal the density holding register 17 is taken via a digital-to-analog converter 18, via two analogue gates 19 and 20 connected in series to an analog The measuring device 23 is connected in such a way that it indicates the signal level which is stored in the analog memory circuit 21. In order to provide an additional audible response, a noise generator 24 is connected to the output terminal of the analog sensor 21 switched on; in order to provide an audible response in headphones 25. The noise generator 24 comprises a noise source whose output noise signals with d em signal, which is stored in the analog memory circuit 21, by using a monostable circuit for cumulation. A common point between the analog gates 19 and 20 is connected to ground via a resistor 26 and an analog gate 27, and a capacitor 28 is also connected between the common point 22 and the earth,

The gates 19, 20 and 2? be in terms of their opening and closing Closing processes controlled by a Ültrasciiall sonar circuit 29. ■

The operation of the circuit is taken at the leicntesten varsOändlicn, Wdrm the Zei fcdiagramm .jezug v / ill, v> iie it in the J ¹ I-gar 3 is shown, and the-Öffnunga- and closing operations of the gate 19 'Sj and 27 zei _c vt.

2 0 9 8 4 2/0794 BAD ORfGiNAL

At time 0 the digital analog, '/ analer 1b supplies an output voltage which corresponds to the calculated radiation density, gate 19 being open and capacitor 2i being charged to this voltage. Za this Zei ο ijt aas Iratter 27 is also open, but the gate 2C is closed. At time A, the ultrasonic sonar assembly 29 sends a pulse to the surface of interest. A control signal is passed through the gate

19 sent, which closes this gate, and the iConaensatar begins to discharge through the resistor 26 and gate 27. Assume that the reflected pulse from the surface is received at the time B. When this reflected pulse is interrupted, the gate 27 is closed, so that the discharge of the capacitor 28 wivd , and the gate 20 is opened to convert the voltage level stored in the capacitor 2 ο into an analog memory-jrscn & l tang 21 enter in order to deliver a corresponding display aaf to the reading device 23 2a. At time G, the gate 27 and 19 are opened, x.iä the gate

20 will be closed. Lie arrangement is c then for a U: willing and indeed to the next 'byrtra ^ ung an ultrasonic pulse to the interessierexiden ^Cberfläc% i3 ± -eren operating cycle / ie.

i'o has thus become clear that the Ließ device 2) ούϊ Arizeige delivers the sicii in a realistic ./eise ii. A ';. Hän _£ -i; *: = !. % of the distance changes, welcae separates the instroment from the area assumed to be contaminated.

? O 9 F -.2 / 079 .

Claims (9)

22U959 Patent application . ■. Λ Simulated Kadioaktivität-Überwaehungssystem ^ν to personnel - ^ training, characterized geke η η ζ calibration η et that a plurality are provided by ^ eldinstrumenten, each of which is able to provide an indication welcne the radiation intensity is, when It receives a data signal from a base station that there is also a device for the geographical localization of each instrument and that a device is provided at the base station to transmit a data signal to each instrument which shows the radiation level at the location of this instrument represents. " . 2. System according to claim 1, characterized in that each instrument is a known Strahlungsmeß- or Strahlungs-Lbervsachungsinstroment in which the normal StrahlungsineS- or radiation monitoring circuits are replaced by electronic circuits which are able to do so the base station to distinguish the signal addressed to this instrument and to use the data supplied from there to provide the operating personnel with a display representative of the radiation level, which is similar to the display that would be provided by this instrument in a realistic situation. 3. System according to claim 1 or 2, characterized geke η η ζ calibrated, net ¹ that two Tociiterstatioiien are provided for localizing the field instrument, which can be arranged in use both from each other and from the base station, da3 the field current duck each with a device for transmitting a response signal, which is then transmitted when the from the base station to the 209 84 2/0794 BAD OHlGiINAL 22U959 respective instrument addressed signal is received that the daughter stations are designed in such a way that they receive such response signals and transmit them to the base station on, that further a device at the base station is present to determine the position of an instrument as a function of the time of arrival of corresponding signals to determine which were further transmitted by each transponder. 4. System according to claim 3, characterized in that that the last-mentioned device at the base station comprises a device to record a transmitted from a field instrument Receive response signal directly. 5. System according to one of the preceding claims, characterized in that, indicates that a field instrument is designed in this way is that it normally receives alpha, beta and / or X-ray radiation and that a device is provided is to modify the size of the display which is provided in response to the data received from the base station depending on the distance that the instrument has assumed to be contaminated from the area separates. 6. System according to claim 5, characterized in eich η et, that the last-mentioned device has a capacitor, which is arranged to be charged to a level aafload.-i which is determined by the data that are received by the base station and that it is during a time which is determined by the distance that separates the instrument from the surface. 7 · System according to one of claims 5 or 6, characterized in that the device for determining the breath that separates the instrument from the surface, 209842 / Q794 a ülti'aschall sonar arrangement that the condenser is arranged to be disconnected from the charging source and connected to a discharge path when the sonar arrangement emits an ultrasonic pulse to the area that it is separated from this Batladepfad and with a display device is connected when the reflected from the '' laugh ultrasonic pulse is scanned and that it is again with the charging source connected before another ultrasound pulse to which! "laugh is transmitted. 8. System according to any one of the preceding claims, characterized GEK e η η δ calibration et η, that the display device is an analog 3peicherscnaltung which is gesunaltet such that it comprises a measuring device and / or an acoustic display device supplying ü. 9. System according to claim 8, characterized in that that the acoustic display device is a noise generator is, which comprises a sound source and a device, which has a monostable circuit to combine output noise signals from the sound source with the signals, which are stored in the analog memory circuit. 209842/0794 Blank page