CN212694848U - Radioactive source shielding body device and control circuit thereof - Google Patents
Radioactive source shielding body device and control circuit thereof Download PDFInfo
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- CN212694848U CN212694848U CN202021212878.9U CN202021212878U CN212694848U CN 212694848 U CN212694848 U CN 212694848U CN 202021212878 U CN202021212878 U CN 202021212878U CN 212694848 U CN212694848 U CN 212694848U
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F1/00—Shielding characterised by the composition of the materials
- G21F1/12—Laminated shielding materials
- G21F1/125—Laminated shielding materials comprising metals
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21G—CONVERSION OF CHEMICAL ELEMENTS; RADIOACTIVE SOURCES
- G21G4/00—Radioactive sources
- G21G4/04—Radioactive sources other than neutron sources
- G21G4/06—Radioactive sources other than neutron sources characterised by constructional features
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0175—Coupling arrangements; Interface arrangements
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- High Energy & Nuclear Physics (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Computing Systems (AREA)
- Mathematical Physics (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The utility model discloses a radioactive source shielding body device and a control circuit thereof, which comprises a shielding body and a control box, wherein the shielding body consists of copper, lead and steel which are arranged from inside to outside in sequence; the center of the shield is provided with an emission hole, one end of the emission hole is provided with a radioactive source cover, the other end of the emission hole is provided with a beam blocking device, travel switches are arranged at the upper end and the lower end of the beam blocking device, the beam blocking device further comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C1, a diode D1, a triode Q1, a comparator U1, an optical coupler U2 and an electromagnet L1, the base of the triode Q1 is connected with the resistor R6, the collector of the triode Q1 is connected with the resistor R7, the diode D1 and the electromagnet L1, the emitter of the triode Q1 is connected with a GND2 of a power supply, an integrating circuit is used for comparing with a reference level, isolation of different voltage levels is realized through the optical coupler, and whether the driving of the.
Description
Technical Field
The utility model belongs to the technical field of the protection of radiation source, specifically relate to a radiation source shield body device and control circuit thereof.
Background
Along with the rapid development of nuclear technology research and application, a large amount of various radioactive wastes are generated, nuclides and activities of the radioactive wastes must be accurately identified and measured before the radioactive wastes are treated, waste barrel measurement based on a gamma scanning technology is a common measurement mode, a radioactive source is adopted to measure and correct the density of a measured medium in the gamma scanning measurement, in addition, standard radioactive sources are utilized to correct and calibrate radiation measurement equipment in the application of the radioactive sources, the radioactive sources are utilized to carry out irradiation treatment and the like, the radioactive sources are stored in a special shielding body and are used for opening and closing the radioactive sources, the radioactive sources are realized by using an electric shielding door at present, the shielding door is not in place in the working process, particularly under the power-off condition, manual reset and maintenance are needed, the measurement error is large, the working reliability of the equipment is low, and the human health of workers is seriously influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that shield door does not arrive position under the interrupted electricity condition of prior art needs the manual work to reset and overhaul and leads to measuring error, provides a radioactive source shielding body device and control circuit thereof.
The utility model discloses a following technical scheme realizes:
the utility model provides a radiation source shield body device, includes shield body and control box, and the shield body comprises copper, lead and the steel that sets gradually from inside to outside, at first shields the radiation source by copper, and the gamma ray of transmission is attenuated by the stereotype again, and last one deck steel sheet attenuates the gamma ray, and different materials have absorbed secondary radiation to reduce the influence of radiation source to the environment, promoted the shielding effect at the steel of same thickness or stereotype, for example: firstly, carrying out ray blocking on a radioactive source by using copper with the thickness of 3mm, then carrying out ray shielding on the radioactive source by using lead with the thickness of 100mm, and finally carrying out final shielding by using steel with the thickness of 12 mm; the center of the shielding body is provided with an emission hole, one end of the emission hole is provided with a radioactive source cover, and the other end of the emission hole is provided with a beam stopper used for blocking a ray beam of a radioactive source;
keep off and all be provided with travel switch at both ends about restrainting the ware, travel switch is used for detecting opening or closing of keeping off and restrainting the ware, the travel switch who sets up respectively about utilizing, whether the realization is opened and the dual detection of closing to keeping off and restrainting the ware, it still is provided with the electro-magnet that is used for controlling to keep off and restraints the ware and remove on the journey direction to keep off the ware upside, when the electro-magnet circular telegram, the electro-magnet produces powerful magnetic force, can make to keep off and restraint the ware and rise, when the electro-magnet outage, because lose the effect of demagnetization, it has great gravity to keep off and restraints ware itself, can slowly descend, until closing the launch hole, it can not effectively open and close to have avoided keeping.
The working principle is as follows: the shielding body is used for shielding the radioactive source and comprises copper, lead and steel from inside to outside, the copper is used for blocking rays of the radioactive source, the lead with higher density is used for shielding the radioactive source, and the steel is used for shielding the radioactive source finally, so that the radioactive source is effectively shielded, and the environment-friendly requirement is met;
the control box comprises an electromagnet, a travel switch, a beam stopper and a socket, the electromagnet controls the beam stopper to be opened and closed under the control of the control circuit, the travel switch detects whether the beam stopper is opened or not, and the travel switch detects whether the beam stopper is closed or not.
The utility model discloses a further preferred, it adopts the tungsten steel to make to keep off the bundle ware.
The utility model discloses a further preferred, keep off and restraint 3 times of ware diameter for launching hole diameter, length is greater than 80mm, for example, the 5mm of launching hole 10 diameter, the diameter that keeps off and restraint the ware is 15mm, and the length that keeps off and restraint the ware is 82mm, keeps off and restraints the material and adopts the tungsten steel.
The utility model discloses a further preferred, the fender is restrainted ware center and is launched the coincidence in hole center under the power down and the closed condition.
The utility model discloses a further preferred, the echelonment structure that the emission hole reduces for by interior to exterior in proper order, the tip end of emission hole is adjacent with keeping off and restrainting the ware for the emission source reduces gradually in the ray direction, and makes the terminal direction of emission hole need less volume keep off and restraints the ware, blocks, realizes miniaturization and modular control.
The utility model provides a control circuit of radiation source shield body device, is including control module and power VCC1 that is used for controlling triode Q1, power VCC1 is connected with electro-magnet L1, and electro-magnet L1 parallel connection has diode D1, and electro-magnet L1 is connected with first electric current branch road and second electric current branch road, and first electric current branch road includes triode Q1, and the second electric current branch road includes resistance R7, and first electric current branch road end ground is connected with power ground GND2, and GND is connected to the terminal ground connection of second electric current branch road.
In a further preferred embodiment of the present invention, the control module includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a comparator U1 and an optical coupler U2, a positive terminal of an led of the optical coupler U2 is connected to the resistor R4, a negative terminal of an led of the optical coupler U2 is connected to a power ground GND1, a common-phase terminal of the comparator U1 is connected to the resistor R1 and the resistor R2, an inverting terminal of the comparator U1 is connected to the resistor R3 and the resistor C1, an output terminal of the comparator U1 is connected to one terminal of the resistor R4, one terminal of the resistor R1 is connected to the common-phase terminal of the resistor R2 and the resistor U1, the other terminal of the resistor R1 is connected to the power source VCC1, one terminal of the resistor R2 is connected to the common-phase terminals of the resistor R1 and the resistor U1, the other terminal of the capacitor R1 is connected to the positive terminal of the comparator U1, and the inverting terminal of the comparator U1 is connected to the positive terminal of the capacitor R1, the negative terminal of the capacitor C1 is connected to the power ground GND1, and one terminal of the resistor R4 is connected to the positive terminal of the light emitting diode of the optocoupler U2.
The utility model discloses a further preferred, the light receiving collector of optical coupler U2 connects resistance R5, and power VCC2 is connected to resistance R5's the other end, and optical coupler U2's light receiving emitter connects resistance R6, and triode Q1 base level is connected to resistance R6's the other end.
The utility model discloses a further preferred, an end connection power VCC2 of electro-magnet L1, another termination diode D1 positive pole, triode Q1 collecting electrode and resistance R7, resistance R7 another end connection power ground GND2, diode D1's negative pole VCC 2.
The working principle is as follows: after the control circuits VCC1 and VCC2 are powered on simultaneously, the voltage of the resistor R1 and the resistor R2 is divided to provide the non-inverting input terminal of the comparator U1, while the voltage at the inverting input of the comparator U1 rises slowly from 0 to VCC through an integration circuit consisting of a resistor R3 and a capacitor C1, so that the output of the comparator U1 is high for a period of time, low for a period of time, thereby controlling the light receiving emitter and the light receiving collector of the optical coupler U2 to be conducted for a period of time and then to be closed, further controlling the Q1 of the triode Q1 to be conducted for a period of time, then, the electromagnetic steel is cut off, so that the large current is realized when the electromagnetic steel is started, and the normal work is realized because the series resistor R7 reduces the current, so that the low power consumption is ensured when the electromagnetic steel works for a long time, the problem that the electromagnetic steel is burnt out due to heating caused by long-time large-current work of the electromagnetic steel is solved, the work power consumption is reduced, and the work reliability is improved;
after the control circuit is powered on, the same-phase end of the comparator U1 is R2 ÷ (R1+ R2). times.VCC 1, the reverse-phase end of the comparator U1 is charged from 0 through R3 to C1 and slowly rises to VCC1, when the reverse-phase end exceeds R2 ÷ (R1+ R2). times.VCC 1, the input end of the comparator is changed from high level to low level, and the electromagnet L1 coil is controlled through the optical couplers U2 and Q1 to be connected with R7 in series or not, so that the electromagnet is started, the power is high, the current is high, the working current is low after the electromagnet is started, the power consumption is low, and the heating value of electromagnetic steel is reduced.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
the utility model discloses a steel, lead and copper complex form the shield of radiation source, the shielding effect of the shield that the steel sheet or the stereotype that found at same thickness has been promoted, regard as the fender bundle ware with the tungsten steel, its diameter is 3 times of collimater hole diameter, length is greater than 80mm, it effectively blocks gamma ray when closing the fender bundle ware, measurement accuracy has been improved, adopt to draw formula electro-magnet drive to keep off the bundle ware and realize that the emission source is opened and close, utilize fender bundle ware gravity outage automatic re-setting, and travel switch detects and keeps off bundle ware position, adopt integrator circuit and reference level comparison, realize the isolation of different voltage classes through the optical coupler, and whether the drive of triode realizes the series power resistance in the coil of electromagnetic steel, it is big to reach starting power, power is little during normal work, thereby calorific capacity greatly reduces on electromagnetic steel wire circle, reliability is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic sectional view of the present invention;
fig. 2 is a side view of the present invention;
fig. 3 is a schematic diagram of the structure of the control circuit of the present invention.
Reference numbers and corresponding part names:
1-shielding body, 2-control box, 3-electromagnet, 4-travel switch, 5-beam stopper, 6-radioactive source cover, 7-steel, 8-lead, 9-copper and 10-emission hole.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail so as not to obscure the present invention.
Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the present invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, it should be understood that the terms "front", "back", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The present invention will be described in detail with reference to fig. 1 to 3.
The first embodiment is as follows: the utility model provides a radiation source shield body device, includes shield body 1 and control box 2, shield body 1 comprises copper 9, plumbous 8 and steel 7 that interior to exterior set gradually, at first shields the radiation source by copper 9, and the gamma ray of transmission is attenuated by the plumbous 8 board again, and 7 boards of last one deck steel attenuate gamma ray, and different materials have absorbed secondary radiation to reduce the influence of radiation source to the environment, promoted the shielding effect at the steel 7 or the plumbous 8 board of same thickness, for example: firstly, carrying out ray blocking on a radioactive source by using copper 9 with the thickness of 3mm, then carrying out ray shielding on the radioactive source by using lead 8 with the thickness of 100mm, and finally carrying out final shielding by using steel 7 with the thickness of 12 mm; the center of the shield body 1 is provided with an emission hole 10, one end of the emission hole 10 is provided with a radioactive source cover 6, the other end of the emission hole is provided with a beam stopper 5, and the beam stopper 5 is used for blocking a ray beam of a radioactive source;
keep off and all be provided with travel switch 4 at last lower both ends of restrainting ware 5, travel switch 4 is used for detecting to keep off and restraints ware 5 and remove in the journey direction, travel switch 4 that sets up respectively about the utilization, whether the realization is opened and the dual detection of closing to keeping off restrainting ware 5, it still is provided with the electro-magnet 3 that is used for controlling to keep off and restraints ware 5 and remove in the journey direction to keep off to restraint 5 upside, when electro-magnet 3 circular telegram, electro-magnet 3 produces powerful magnetic force, can make to keep off and restraint ware 5 and rise, when electro-magnet 3 outage, because lose the effect of demagnetization, it has great gravity to keep off restrainting ware 5 itself, can slowly descend, until closing launch hole 10, it can not effectively open and close to have avoided keeping off restrainting ware 5, control and measuring reliability has been.
The working principle is as follows: the shielding body 1 is used for shielding the radioactive source and comprises copper 9, lead 8 and steel 7 from inside to outside, the copper 9 is used for blocking rays of the radioactive source, the lead 8 with higher density is used for shielding the radioactive source, and the steel 7 is used for shielding finally, so that the radioactive source is effectively shielded, and the environment-friendly requirement is met;
the control box 2 comprises an electromagnet 3, a travel switch 4, a beam stopper 5 and a socket, wherein the electromagnet 3 controls the beam stopper 5 to be opened and closed under the control of the control circuit, the travel switch 4 detects whether the beam stopper 5 is opened or not, and the travel switch 4 detects whether the beam stopper 5 is closed or not.
The beam stop 5 is made of tungsten steel 7 as a conventional option.
The second embodiment: the diameter of the beam stopper 5 is 3 times of the diameter of the emitting hole 10, the length of the beam stopper 5 is larger than 80mm, for example, the diameter of the emitting hole 1010 is 5mm, the diameter of the beam stopper 5 is 15mm, the length of the beam stopper 5 is 82mm, the beam stopper 5 is made of tungsten steel 7, the center of the beam stopper 5 coincides with the center of the emitting hole 10 in the power-off and closing states, the emitting hole 10 is of a stepped structure which is sequentially reduced from inside to outside, so that the emitting source is gradually reduced in the ray direction, the small end of the emitting hole is adjacent to the beam stopper, the beam stopper 5 with a small amount is needed in the tail end direction of the emitting hole 10, blocking is achieved, and miniaturization and modularization control is achieved.
The third embodiment is as follows: the utility model provides a control circuit of radiation source shield body device, is including control module and power VCC1 that is used for controlling triode Q1, power VCC1 is connected with electro-magnet L1, and electro-magnet L1 parallel connection has diode D1, and electro-magnet L1 is connected with first electric current branch road and second electric current branch road, and first electric current branch road includes triode Q1, and the second electric current branch road includes resistance R7, and first electric current branch road end ground is connected with power ground GND2, and GND is connected to the terminal ground connection of second electric current branch road.
The control module comprises a resistor R, a capacitor C, a comparator U and an optical coupler U, the positive end of a light emitting diode of the optical coupler U is connected with the resistor R, the negative end of the light emitting diode of the optical coupler U is connected with a power ground GND, the same-phase end of the comparator U is connected with the resistor R and the resistor R, the reverse-phase end of the comparator U is connected with the resistor R and the resistor C, the output end of the comparator U is connected with one end of the resistor R, one end of the resistor R is connected with the same-phase ends of the resistor R and the resistor U, the other end of the resistor R is connected with a power VCC, one end of the resistor R is connected with the same-phase ends of the resistor R and the resistor U, the other end of the resistor R is connected with the power ground GND, one end of the resistor R is connected with the positive pole of the capacitor C and the reverse-phase end of the comparator U, the positive pole of the capacitor, one end of the resistor R4 is connected to the positive end of the light emitting diode of the optocoupler U2.
The light receiving collector of the optical coupler U2 is connected with a resistor R5, the other end of the resistor R5 is connected with a power supply VCC2, the light receiving emitter of the optical coupler U2 is connected with a resistor R6, and the other end of the resistor R6 is connected with a base stage of a triode Q1.
One end of the electromagnet L1 is connected with a power supply VCC2, the other end is connected with the anode of the diode D1, the collector of the triode Q1 and the resistor R7, the other end of the resistor R7 is connected with a power supply ground GND2, and the cathode of the diode D1 is connected with the power supply VCC 2.
The in-phase end resistor R2 of the comparator U1 is more than or equal to 2R1, and R3 and C1 connected with the reverse phase end of the U1 meet the requirement of time (T1) for starting the electromagnet L1, namely 0.7 xR 3 xC 1 xR 2 ÷ (R1+ R2) > T1;
the electromagnet L1 is a pull-type electromagnetic steel, and a pull rod of the electromagnet L1 is mechanically connected with a beam stopper of an emission source;
the model of the number comparator U1 is LM 324;
the model of the optical coupler U2 is PC 357N;
the type of the electromagnet L1 is TAU1683, and the electrification rate is 100%.
The working principle is as follows: after the control circuits VCC1 and VCC2 are powered on simultaneously, the voltage of the resistor R1 and the resistor R2 is divided to provide the non-inverting input terminal of the comparator U1, while the voltage at the inverting input of the comparator U1 rises slowly from 0 to VCC through an integration circuit consisting of a resistor R3 and a capacitor C1, so that the output of the comparator U1 is high for a period of time, low for a period of time, thereby controlling the light receiving emitter and the light receiving collector of the optical coupler U2 to be conducted for a period of time and then to be closed, further controlling the Q1 of the triode Q1 to be conducted for a period of time, then, the electromagnetic steel is cut off, so that the large current is realized when the electromagnetic steel is started, the normal work is realized because the series resistor R7 reduces the current, the low power consumption is ensured when the electromagnetic steel works for a long time, the problem that the electromagnetic steel is burnt out due to heating caused by long-time large-current work of the electromagnetic steel is solved, the work power consumption is reduced, and the work reliability is improved.
After the control circuit is powered on, the same-phase end of the comparator U1 is R2 ÷ (R1+ R2). times.VCC 1, the reverse-phase end of the comparator U1 is charged from 0 through R3 to C1 and slowly rises to VCC1, when the reverse-phase end exceeds R2 ÷ (R1+ R2). times.VCC 1, the input end of the comparator U1 is changed from high level to low level, and the electromagnet L1 coil is controlled through the optical couplers U2 and Q1 to be connected with R7 in series or not, so that the electromagnet is started with high power and high current, the working current after the electromagnet is started is low, the power consumption is low, and the heating value of electromagnetic steel is reduced.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A radioactive source shielding body device is characterized by comprising a shielding body (1) and a control box (2), wherein the shielding body (1) consists of copper (9), lead (8) and steel (7) which are sequentially arranged from inside to outside, a transmitting hole (10) is formed in the center of the shielding body (1), a radioactive source cover (6) is arranged at one end of the transmitting hole (10), and a beam blocking device (5) is arranged at the other end of the transmitting hole;
travel switches (4) are arranged at the upper end and the lower end of the beam stopper (5), the travel switches (4) are used for detecting the opening or closing of the beam stopper (5), and an electromagnet (3) used for controlling the beam stopper (5) to move in the stroke direction is further arranged on one side of the beam stopper (5).
2. The radioactive source shield arrangement according to claim 1, wherein the beam stop (5) is made of tungsten steel (7).
3. The radioactive source shield arrangement according to claim 1, wherein the beam stop (5) has a diameter of 3 times the diameter of the emission aperture (10) and a length of more than 80 mm.
4. The radioactive source shield arrangement according to claim 1, wherein the center of the beam stop (5) coincides with the center of the emission aperture (10) in the powered down and off state.
5. The radioactive source shielding device according to claim 1, wherein the emitting hole (10) is a stepped structure which is sequentially reduced along the axial direction of the emitting hole (10), and the small end of the emitting hole (10) is adjacent to the beam stopper (5).
6. The utility model provides a control circuit of radiation source shield body device, is including control module and power VCC1 that is used for controlling triode Q1, a serial communication port, power VCC1 is connected with electro-magnet L1, and electro-magnet L1 parallel connection has diode D1, and electro-magnet L1 is connected with first electric current branch road and second electric current branch road, and first electric current branch road includes triode Q1, and the second electric current branch road includes resistance R7, and first electric current branch road end ground is connected with power ground GND2, and second electric current branch road end ground connects GND 2.
7. The control circuit of the radioactive source shield device according to claim 6, wherein the control module comprises a resistor R, a capacitor C, a comparator U and an optical coupler U, wherein the positive end of the light emitting diode of the optical coupler U is connected with the resistor R, the negative end of the light emitting diode of the optical coupler U is connected with the ground GND, the non-inverting end of the comparator U is connected with the resistor R and the resistor R, the inverting end of the comparator U is connected with the resistor R and the resistor C, the output end of the comparator U is connected with one end of the resistor R, one end of the resistor R is connected with the non-inverting ends of the resistor R and the resistor U, the other end of the resistor R is connected with the VCC, one end of the resistor R is connected with the non-inverting ends of the resistor R and the resistor U, the other end of the resistor R is connected with the ground GND, one end of the resistor R is connected with the positive electrode of the, the positive electrode of the capacitor C1 is connected with the resistor R3 and the inverting terminal of the comparator U1, the negative electrode terminal of the capacitor C1 is connected with the power ground GND1, and one end of the resistor R4 is connected with the positive end of the light-emitting diode of the optocoupler U2.
8. The control circuit of the radioactive source shield assembly according to claim 7, wherein the light receiving collector of the optocoupler U2 is connected to a resistor R5, the other end of the resistor R5 is connected to a power source VCC2, the light receiving emitter of the optocoupler U2 is connected to a resistor R6, and the other end of the resistor R6 is connected to a base stage of a transistor Q1.
9. The control circuit of the radioactive source shield device according to claim 6, wherein one end of the electromagnet L1 is connected to a power source VCC2, the other end is connected to the anode of the diode D1, the collector of the transistor Q1 and the resistor R7, the other end of the resistor R7 is connected to a power ground GND2, and the cathode of the diode D1 is connected to the power source VCC 2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020776233 | 2020-05-12 | ||
| CN2020207762331 | 2020-05-12 |
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Effective date of registration: 20220323 Address after: 621000 building 31, No.7, Section 2, Xianren Road, Youxian District, Mianyang City, Sichuan Province Patentee after: China Ordnance Equipment Group Automation Research Institute Co.,Ltd. Address before: 621000 No.98 Youxian East Road, Youxian District, Mianyang City, Sichuan Province Patentee before: MIANYANG WEIBO ELECTRONIC Co.,Ltd. |
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