CN110416057A - Photomultiplier tube shielding construction and signal supervisory instrument - Google Patents
Photomultiplier tube shielding construction and signal supervisory instrument Download PDFInfo
- Publication number
- CN110416057A CN110416057A CN201910711892.9A CN201910711892A CN110416057A CN 110416057 A CN110416057 A CN 110416057A CN 201910711892 A CN201910711892 A CN 201910711892A CN 110416057 A CN110416057 A CN 110416057A
- Authority
- CN
- China
- Prior art keywords
- photomultiplier tube
- shielding
- shell
- photomultiplier
- cushion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010276 construction Methods 0.000 title claims abstract description 35
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 230000003287 optical effect Effects 0.000 claims abstract description 12
- 230000000694 effects Effects 0.000 claims abstract description 9
- 238000009413 insulation Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 229910000889 permalloy Inorganic materials 0.000 claims description 3
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000007779 soft material Substances 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- 230000035699 permeability Effects 0.000 claims 1
- 238000012545 processing Methods 0.000 description 43
- 238000004891 communication Methods 0.000 description 12
- 230000005672 electromagnetic field Effects 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 6
- 238000002834 transmittance Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 230000005622 photoelectricity Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000005304 optical glass Substances 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/0295—Constructional arrangements for removing other types of optical noise or for performing calibration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
- H01J43/04—Electron multipliers
- H01J43/28—Vessels, e.g. wall of the tube; Windows; Screens; Suppressing undesired discharges or currents
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measurement Of Radiation (AREA)
Abstract
The present invention provides a kind of signal supervisory instrument, and for the detection of faint optical signal, the signal supervisory instrument device includes first shell, photomultiplier tube and the photomultiplier tube shielding construction for shielding photomultiplier tube.The first shell opens up mounting groove.The photomultiplier tube shielding construction includes shielding cylinder, it inserts in the mounting groove one end of the shielding cylinder, the photomultiplier tube is accommodated in the shielding cylinder, the photomultiplier transit tube socket of the photomultiplier tube is located at one end that the shielding cylinder deviates from the first shell, and the shielding cylinder has magnetic field shielding effect.The present invention also provides a kind of photomultiplier tube shielding constructions.The present invention can shield the magnetic field in photomultiplier tube working environment, be affected to avoid the performance of photomultiplier tube, to improve the accuracy of detection by the way that the shielding cylinder with shielding action is arranged outside photomultiplier tube.
Description
Technical field
The present invention relates to photomultiplier tube encapsulation technology field more particularly to a kind of photomultiplier tube shielding construction and have
The signal supervisory instrument of the photomultiplier tube shielding construction.
Background technique
Photomultiplier tube is low-light-level measurement, especially the important detector of limit faint light detection technology.Life science,
In the high-tech areas such as biochemistry, rigorous analysis, optical, mechanical and electronic integration, photomultiplier tube has extremely important effect.But
Photomultiplier tube is very sensitive to magnetic field, it is desirable that using in the environment there is no magnetic field, is important to avoid proximity to power supply change
Depressor or magnet etc..However, in the prior art, in certain apparatus, internal circuit or component can produce when working
Raw certain electromagnetic field, and can not spatially avoid again, these can all influence photomultiplier tube to the accurate of optical signal detecting
Property.
Summary of the invention
In view of this, the present invention provides a kind of photomultiplier tube that can completely cut off the magnetic field in photomultiplier tube working environment
Shielding construction, and the signal supervisory instrument with the photomultiplier tube shielding construction.
The present invention provides a kind of photomultiplier tube shielding construction, is installed in first shell, for shielding photomultiplier tube,
The first shell offers mounting groove, and the photomultiplier tube shielding construction includes shielding cylinder, and one end of the shielding cylinder is inserted
In the mounting groove, the photomultiplier tube is accommodated in the shielding cylinder, the photomultiplier tube of the photomultiplier tube
Tube socket is located at one end that the shielding cylinder deviates from the first shell, and the shielding cylinder has magnetic field shielding effect.
The present invention also provides a kind of signal supervisory instruments, for the detection of faint optical signal, the signal supervisory instrument packet
First shell, photomultiplier tube and photomultiplier tube shielding construction above-mentioned are included, the first shell offers mounting groove, described
Photomultiplier tube shielding construction includes shielding cylinder, and one end of the shielding cylinder is inserted in the mounting groove, the photomultiplier transit
Pipe is accommodated in the shielding cylinder, and the photomultiplier transit tube socket of the photomultiplier tube is located in the shielding cylinder away from described the
One end of one shell, the shielding cylinder have magnetic field shielding effect.
Photomultiplier tube shielding construction and signal supervisory instrument provided by the invention, by the way that tool is arranged outside photomultiplier tube
The shielding cylinder for having magnetic field shielding to act on is capable of the electromagnetic field of shielded signal detection device inside generation, avoids photomultiplier tube
Performance is influenced by the magnetic field in working environment, to improve photomultiplier tube to the accuracy of optical signal detecting.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is some embodiments of the present invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the schematic perspective view of the present invention signal supervisory instrument that wherein an embodiment provides.
Fig. 2 is in Fig. 1 along the partial cutaway schematic of II-II line.
Fig. 3 is the perspective exploded view of the signal supervisory instrument in Fig. 1.
Fig. 4 is the perspective exploded view at another visual angle of Fig. 3.
Fig. 5 is the partial structure diagram of the signal supervisory instrument in Fig. 3.
Fig. 6 is the frame connection schematic diagram of the signal supervisory instrument in Fig. 1.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under that premise of not paying creative labor
Embodiment shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the instruction such as term " on ", "lower", "left", "right", "inner", "outside"
Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the present invention and simplification retouch
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.In addition, term " first ", " second " etc. are used for description purposes only, and cannot manage
Solution is indication or suggestion relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " etc. shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirectly connected through an intermediary.
For the ordinary skill in the art, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
Also referring to Fig. 1 to Fig. 4, the present invention provides a kind of signal supervisory instrument 100, the inspection for faint optical signal
It surveys, the signal supervisory instrument 100 includes a first shell 11, a second shell 12 and two third shells 13.Specifically,
The first shell 11 is oppositely arranged with the second shell 12, and the second shell 12 is located at 11 top of first shell,
Two third shells 13 connect the first shell 11 and the second shell 12 from left and right sides pairing respectively.Described
One shell 11, the second shell 12 and two third shells 13 crowd around to form an accommodating space.The signal detection dress
To set 100 further include the photomultiplier tube shielding construction being contained in the accommodating space, is set to the photomultiplier transit tube shield
Photomultiplier tube 20, signal-processing board 30, tally 40, hardboard 50 and partial pressure plate 55 in structure.Specifically, the meter
Number plate 40 and the hardboard 50 are mounted between the first shell 11 and the second shell 12；The signal-processing board
30 are installed on the second shell 12 towards the side of the first shell 11；The partial pressure plate 55 is installed on the signal processing
Plate 30 deviates from the side of the photomultiplier transit tube socket 25.Specifically, the photomultiplier tube shielding construction is installed on described
On one shell 11, for shielding photomultiplier tube 20, the photomultiplier tube shielding construction includes having magnetic field shielding effect
Shielding cylinder 60, the photomultiplier tube 20 are accommodated in shielding cylinder 60, and the photosurface of the photomultiplier tube 20 is towards described
One shell 11.Specifically, the side that the first shell 11 faces the second shell 12 opens up mounting groove 118, the shielding
One end of cylinder 60 is inserted in the mounting groove 118, and the photomultiplier transit tube socket 25 of the photomultiplier tube 20 is located at the screen
One end that cylinder 60 deviates from the first shell 11 is covered, the photomultiplier transit tube socket 25 is electrically connected to the signal-processing board 30.
It, can by the way that the shielding cylinder 60 with magnetic field shielding effect is arranged outside the photomultiplier tube 20 in the present invention
Shield the magnetic field in 20 working environment of photomultiplier tube, that is, the signal-processing board inside the signal supervisory instrument 100
30, the electromagnetic field generated when tally 40, hardboard 50 and partial pressure plate 55 work, to avoid the performance of the photomultiplier tube 20
It is affected, to guarantee the accuracy of detection.
It should be noted that the position of the photosurface of the corresponding photomultiplier tube 20 of the first shell 11 is provided with
Light portion 112, so that light to be measured can be detected by the photosurface of the photomultiplier tube 20.In the present embodiment, institute transmittance section 112
For the light hole for being embedded with optical glass, thus, light to be measured can not only penetrated, but also can prevent the dirts such as dust from entering device
It is interior and be adhered on the photosurface of the photomultiplier tube 20.
In other embodiments, the light hole can be not provided with optical glass or the transmittance section 122 by transparent material
Material is integrally machined molding with first shell 11.
Preferably, the diameter of the transmittance section 112 is greater than or equal to the diameter of the photosurface of the photomultiplier tube 2, with
Guaranteeing the optical signal through the transmittance section 112 can be detected by the photosurface of the photomultiplier tube 20.
As shown in Figures 1 to 4, the first shell 11, the second shell 12 and two third shells 13 can be with
It is detachably connected by the either types such as being spirally connected, engaging.In the present embodiment, the first shell 11 and the second shell 12
Generally rectangular shaped, two third shells 13 are in U-shape and opposite, the upper and lower ends difference of two third shells 13 that is open
It is spirally connected and is fixed in the first shell 11 and the second shell 12, the first shell 11, the second shell 12 and two
A third shell 13 crowds around to form a rectangle accommodating space, and the signal supervisory instrument 100 is substantially in box-shaped.
In other embodiments, the first shell 11, the second shell 12 and two third shells 13 can be with
For other Reasonable Shapes, for example, the first shell 11 and the second shell 12 are generally circular, two third shells
13 be in semi-barrel shape, and the first shell 11, the second shell 12 and two third shells 13 crowd around to form a cylinder
Accommodating space, the signal supervisory instrument 100 are generally cylindrical.
Preferably, the first shell 11, the second shell 12 and the third shell 13 be shielding casing or
Person is equipped with electro-magnetic screen layer, thus, the accommodating space becomes electromagnetic shielding space, so that the photoelectricity times in the accommodating space
Increase pipe 20, signal-processing board 30 and tally 40 etc. not by extraneous electromagnetic interference.
Wherein, the shielding casing is metal shell, high-permeability material shell or conductive plastic enclosure；The electricity
Magnetic masking layer is the high-permeability material layer being sprayed on entire shell, or the metal material layer being attached on entire shell.This
In embodiment, the first shell 11, the second shell 12 and the third shell 13 are lighttight metal shell, thus
The photomultiplier tube 20 not by extraneous electromagnetic interference, will not only be influenced by ambient light.
It is further preferred that light barrier 135 is arranged on the third shell 13, to prevent ambient from two described the
Gap between three shells 13 is injected in the accommodating space.In the present embodiment, the third shell 13 on right side it is opposite two
A light barrier 135 is respectively set close to the position of open edge in inside.When two 13 pairings of third shell connect,
Two light barriers 135 are located at the gap between two third shells 13, so as to prevent ambient from injecting
In the accommodating space, avoid the photomultiplier tube 20 impacted.
In other embodiments, two light barriers 135 can be respectively arranged at 13 phase of third shell on right side
Pair two outsides close to the position of open edge, or be respectively arranged at the opposite two sides of the third shell 13 and the position on right side
In one outside of an inside.
In other embodiments, two light barriers 135 can be respectively arranged at 13 phase of third shell in left side
Pair two sides, can be two inside, be also possible to two outside or one inside one outside.
In other embodiments, two light barriers 135 can also be respectively arranged on two third shells 13
And opposite two sides are located at, likewise, can be two insides, it is also possible to one outside of two outsides or an inside.
Referring to Figure 2 together to Fig. 4, the signal-processing board 30, the tally 40 and the hardboard 50 pass through spiral shell
It the either types such as connects, engage to be detachably secured on corresponding shell.It is the signal-processing board 30, described in the present embodiment
Tally 40 and the hardboard 50 are fixed on corresponding shell by being spirally connected.
Specifically, mounting post 114, the opposite other side tool of the first shell 11 is arranged in the side of the first shell 11
There is a boss 116, above-mentioned mounting groove 118 is opened on the boss 116, and the inner bottom surface of the mounting groove 118 opens up
State transmittance section 112.One end of the tally 40 is bolted in the mounting post 114, the opposite other end of the tally 40
It is electrically connected at the signal-processing board 30；One end of the hardboard 50 is bolted in the boss 116 and installs towards described
114 side, the opposite other end of the hardboard 50 are electrically connected at signal-processing board 30.The signal-processing board 30 is spirally connected
It is fixed in the second shell 12, and is parallel to the second shell 12 and the first shell 11, the signal-processing board
30 are arranged the photomultiplier transit tube socket 25 towards the side of the first shell 11, and the photomultiplier tube 20 is plugged in described
Photomultiplier transit tube socket 25.The photomultiplier tube 20, the tally 40 and the hardboard 50 are each perpendicular to the signal
Processing board 30, the hardboard 50 is between the photomultiplier tube 20 and the tally 40.
As shown in Figure 2 and Figure 4, the partial pressure plate 55 is provided with several contact pins, the partial pressure plate 55 by be plugged and fixed in
The signal-processing board 30 deviates from the side of the photomultiplier transit tube socket 25, and the position with the photomultiplier transit tube socket 25
It is corresponding.The second shell 12 offers accommodating cavity 121, and the partial pressure plate 55 is contained in the accommodating cavity 121.
In the present embodiment, the photomultiplier tube 20, the signal-processing board 30, the tally 40, the hardboard
50 and 55 rational deployment of partial pressure plate, so that the compact overall structure of the signal supervisory instrument 100, occupied space are few.
Wherein, the photomultiplier tube 20, the tally 40, the hardboard 50 and the partial pressure plate 55 are electrically connected respectively
It is connected to the signal-processing board 30.
Preferably, in the present embodiment, the pipe needle of the photomultiplier transit tube socket 25 is welded on the signal-processing board 30
And be electrically connected, the pipe needle of the photomultiplier tube 20 is plugged on the photomultiplier transit tube socket 25 and is electrically connected to described
Signal-processing board 30；Several connectors with slot, the tally 40, the high pressure are provided on the signal-processing board 30
Plate 50 and the partial pressure plate 55 are provided with corresponding contact pin, and the tally 40, the hardboard 50 and the partial pressure plate 55 are logical
Contact pin is crossed to be plugged on corresponding connector and be electrically connected to the signal-processing board 30.In the present embodiment, each circuit board is adopted
It is electrically connected with the connection type of grafting, is conducive to the installation and replacement of circuit board.
In other embodiments, the tally 40, the hardboard 50 and the partial pressure plate 55 can pass through welding
Connection type is electrically connected to the signal-processing board 30.
It should be noted that corresponding circuit is provided on the signal-processing board 30, the partial pressure plate 55 and the letter
After number processing board 30 is electrically connected, the partial pressure plate 55 pass through corresponding circuit respectively with the photomultiplier transit tube socket 25 and institute
State the electrical connection of hardboard 50.
Wherein, the electronic components such as transformer are provided on the hardboard 50, these electronic components and the high pressure
Plate 50 and the partial pressure plate 55 being electrically connected with the hardboard 50 collectively form a high-pressure modular, and the high-pressure modular connects a power supply
Later, the hardboard 50 is boosted the low-voltage that the power supply provides for high voltage, the partial pressure plate by the transformer
The high voltage that the hardboard 50 generates is divided into several current potentials according to certain dividing ratios by 55, and further passes through the photoelectricity
Multiplication tube socket 25 is applied on the corresponding pipe needle of the photomultiplier tube 20, so that the photomultiplier tube 20 can normal work
Make.
In the present invention, the partial pressure plate 55 is connected to the signal-processing board 30 away from the photoelectricity times by connector
The side for increasing tube socket 25, in the prior art by the method for dividing the built-in setting of plate compared with, the entirety that can reduce device is multiple
Miscellaneous degree and occupied space.
Further, as shown in fig. 6, being provided with signal processing circuit 31 on the signal-processing board 30, the tally
Counting circuit 41 is provided on 40.The signal processing circuit 31 can be at the output signal to the photomultiplier tube 20
Reason, the counting circuit 41 can be counted according to the processing result of the signal processing circuit 31.
Specifically, the high-pressure modular, the photomultiplier tube 20, the signal processing circuit 31 and the counting circuit
41 are sequentially connected electrically.At work, the high-pressure modular is that the photomultiplier tube 20 provides operating voltage, the photomultiplier transit
Pipe 20 starts to detect faint optical signal, and converts optical signals to electric signal；Then, the signal processing circuit 31 obtains described
Electric signal and amplify, screen, A/D conversion etc. processing, then output for counting pulse signal；Finally, the counting
After circuit 41 obtains the pulse signal, the number of the pulse signal is counted.
In the present invention, the signal-processing board 30, the tally 40 and the hardboard 50 are separately fixed at accordingly
On shell, the photomultiplier tube 20 and the partial pressure plate 55 are installed on the signal-processing board 30 and are located at the signal
Manage the opposite two sides of plate 30, the photomultiplier tube 20, the hardboard 50 and the tally 40 are disposed adjacent in described the
Between one shell 11 and the second shell 12, each component layouts are reasonable, and compact overall structure, occupied space are few；Moreover, described
Photomultiplier tube 20, the tally 40, the hardboard 50 and the partial pressure plate 55 use the connection side of grafting or welding
Formula is electrically connected to the signal-processing board 30, interconnects directly with one another, and signal transmission path is short, loss is small and transmission is stablized, thus
Guarantee the accuracy of signal detection.In addition, the shell of the signal supervisory instrument 100 is made of electromagnetic shielding, can shield
The interference of extraneous electromagnetic field, can be further ensured that the accuracy of signal detection.
Fig. 2 and Fig. 6 are please referred to, the signal supervisory instrument 100 further includes being set to the signal-processing board 30 away from institute
The communication interface 35 of the side of first shell 11 is stated, the tally 30 is additionally provided with control circuit 42 and parameter adjustment circuit
43.The control circuit 42 is electrically connected with the counting circuit 41 with the parameter adjustment circuit 43 respectively, the parameter adjustment
Circuit 43 is also electrically connected with the signal processing circuit 31 and the high-pressure modular respectively.
It should be noted that corresponding circuit is provided on the signal-processing board 30, the signal-processing board 30 and institute
After stating the electrical connection of tally 40, the control circuit 42 on the tally 40 can connect with the communication on the signal-processing board 30
Mouth 35 is electrically connected, thus, the control circuit 42 can be upper by the connecting line being plugged on the communication interface 35 and outside
Machine 200 connects, to realize data transmitting and parameter adjustment.
Wherein, wire connection cavity 123, the wire connection cavity is arranged in the position of the corresponding communication interface 35 of the second shell 12
123 bottom opens up the opening 125 exposed for the communication interface 35, and connecting line can be plugged in described from the opening 125
On communication interface 35.
Preferably, as shown in figure 3, in the present embodiment, the side of the wire connection cavity 121 opens up wire lead slot 127, the wiring
Chamber 123 is covered by a capping 37, and 127 part of wire lead slot is exposed.The capping 37 can protect the wire connection cavity
Communication interface 35 in 123, and dust-proof effect can be played, and the part that connecting line then can be exposed from the wire lead slot 127
It draws.
Wherein, the communication interface 35 is preferably digital signal interface.The digital signal interface is transmitted by connecting line
When signal, signal strong antijamming capability does not need additional interference protection measure.
Specifically, the counting circuit 41, after completing to count, the control circuit 42 can obtain count results and defeated
Corresponding digital signal out, the digital signal pass to the host computer 200, the host computer by the communication interface 35
200 display screen can then show the related data for the faint optical signal that the photomultiplier tube 20 detects.
It should be noted that the signal supervisory instrument 100 is additionally provided with power interface, for connecting with external power supply
It connects, the power supply provides the signal supervisory instrument 100 and works required electric energy.Preferably, in the present embodiment, the power supply is connect
Mouth shares a port with the communication interface 35 and exposes at the opening 125, and the power interface connects with the communication
35 shared a ports of mouth can be reduced occupied space, keep structure more compact.
Further, user can also judge the running parameter of the signal supervisory instrument 100 after knowing related data
Whether need to calibrate, for example, whether the operating voltage of the photomultiplier tube 20 normal, also or, the signal processing circuit
Whether the parameter when output electric signal of the 31 processing photomultiplier tubes 20 is correct.Specifically, needing to carry out parameter adjustment
When, user inputs calibration information by the host computer 200, these calibration informations are fed back to described by the communication interface 35
Control circuit 42, the control circuit 42 after obtaining calibration information, control the parameter adjustment circuit 43 to the signal at
It manages circuit 31 or the high-pressure modular carries out corresponding parameter adjustment.
In the present invention, user can directly be calibrated the signal supervisory instrument 100 by the host computer 200, and
It does not need to dismantle on the shell of the signal supervisory instrument 100, it is easy to operate, it is high-efficient, it is also convenient for adjustment repeatedly.
It is understood that the shell of the signal supervisory instrument 100 can only shield extraneous electromagnetic field, it is still, described
If the transformer in dry circuit and the high-pressure modular inside signal supervisory instrument 100 can equally generate one at work
Fixed electromagnetic field, the photomultiplier tube 20 will receive certain interference, and then may cause signal detection inaccuracy.The present invention
In, by the way that the shielding cylinder 60 with magnetic field shielding effect is arranged outside the photomultiplier tube 20, then it can shield the signal
The magnetic field generated inside detection device 100, the performance to avoid the photomultiplier tube 20 are affected, to guarantee detection
Accuracy.
Specifically, the shielding cylinder 60 is made of high-permeability material, the high-permeability material be iron, permalloy,
One of dilval, si fe alloy.In the present embodiment, the shielding cylinder is made of permalloy.
Wherein, the internal diameter of the shielding cylinder 60 is greater than the diameter of the photomultiplier tube 20.The internal diameter of the shielding cylinder 60
It is bigger, be conducive to for being inserted into the shielding cylinder 60 photomultiplier tube 20.Furthermore when the photomultiplier tube 20 is inserted into institute
When stating in shielding cylinder 60, there are gaps between the photomultiplier tube 20 and the shielded-plate tube 60, to prevent the signal detection
When device 100 shakes, the photomultiplier tube 20 and the shielded-plate tube 60 occur hard to contact and damage the photomultiplier tube 20.
Wherein, the shielding cylinder 60 at least forms insulating layer in outer surface sprays insulating material, to realize electrical shielding.It is excellent
Choosing, in the present embodiment, the surfaces externally and internally of the shielding cylinder 60 is each formed with insulating layer, to prevent some on a wherein surface
The insulating layer at position falls off and electrical shielding is caused to fail.
Referring to Figure 2 together to Fig. 4, the photomultiplier tube shielding construction further include annular the first cushion 70 and/
Or second cushion 80, first cushion 70 and second cushion 80 are respectively used to filling and seal the photomultiplier transit
Gap between pipe 20 and the opposite both ends of the shielding cylinder 60.
Preferably, in the present embodiment, the photomultiplier tube shielding construction includes first cushion 70 and described
Two cushions 80 improve so that part of the photomultiplier tube 20 except photosurface is fully sealed to faint optical signal
Detection accuracy.
Specifically, first cushion 70 is sheathed on the outer circumference surface of the photomultiplier transit tube socket 25, described
The first annular boss 75 of inward flange axial direction projection of side of one cushion 70 towards the shielding cylinder 60, it is described first annular convex
Platform 75 is embedded in the gap between the photomultiplier tube 20 and the upper end of the shielded-plate tube 60, and first cushion 70 is convex
Side equipped with the first annular boss 75 is connected to the end face of the upper end of the shielding cylinder 60.
Specifically, second cushion 80 is plugged in one that the shielding cylinder 60 deviates from the photomultiplier transit tube socket 25
End, second cushion 80 are connected to the end face edge of the photomultiplier tube 20, the outer peripheral surface of second cushion 80
It is connected to the inner peripheral surface of the shielding cylinder 60, the outer edge of side of second cushion 80 towards the photomultiplier tube 20
Axial the second annular convex platform of projection 85, second annular convex platform 85 are embedded at the photomultiplier tube 20 and the shielding cylinder 60
Lower end between gap in.
Wherein, first cushion 70 and second cushion 80 use light-blocking soft material.In the present embodiment,
First cushion 70 and second cushion 80 use the rubber of black.
Further, the photomultiplier tube shielding construction further includes the insulation sleeve 90 of both ends open, the insulation sleeve 90
It is set in the mounting groove 118, is convexly equipped with protruding portion 95 to radially inner side at the port of the lower end of the insulation sleeve 90, it is described
The lower end of shielding cylinder 60 is inserted into the insulation sleeve 90 from the port of the upper end of the insulation sleeve 90 and is connected to the protruding portion
95, the insulation sleeve 90 is for preventing the shielding cylinder 60 from contacting with the first shell 11 and the shielding cylinder 60 being caused to connect
Ground increases noise to avoid photomultiplier tube 20 of the object in the shielding cylinder 60 in earthing potential.
As described above, the photomultiplier tube shielding construction includes shielding cylinder 60, the first cushion 70, the second cushion 80
And insulation sleeve 90.Specifically, please referring to Fig. 2 and Fig. 5, installation steps are as follows:
Step 1: first insulation sleeve 90 is set in the mounting groove 118 of first shell 11, make the outer wall and peace of insulation sleeve 90
The inner wall of tankage 118 is adjacent to；
Step 2: the second cushion 80 to be sheathed on to the interior lower end of shielding cylinder 60, the outside wall surface of the second cushion 80 with
The inner peripheral surface of shielding cylinder 60 is adjacent to；
Step 3: shielding cylinder 60 is inserted into insulation sleeve 90 until being connected to the protruding portion 95 of insulation sleeve 90；
Step 4: the first cushion 70 is sheathed on the outer circumference surface of photomultiplier transit tube socket 25 and slightly towards in second shell
Then photomultiplier tube 20 is plugged on photomultiplier transit tube socket 25 by body 12；
Step 5: photomultiplier tube 20 is inserted into shielding cylinder 60 until the outer edge of the photosurface of photomultiplier tube 20 supports
Be connected to the side that the second cushion 80 is convexly equipped with the second annular convex platform 85, the second annular convex platform 85 be embedded at photomultiplier tube 20 with
In gap between the lower end of shielding cylinder 60；
Step 6: the first cushion 70 of adjustment is sheathed on the position on the outer circumference surface of photomultiplier transit tube socket 25 downwards,
Until the side that the first cushion 70 is convexly equipped with first annular boss 75 is connected to the end face of the upper end of shielding cylinder 60, it is first annular
Boss 75 is embedded in the gap between photomultiplier tube 20 and the upper end of shielded-plate tube 60, is installed.
In signal supervisory instrument 100 provided by the invention, by the way that shielding construction, energy is arranged outside the photomultiplier tube 20
Enough shield the electromagnetic field generated inside the signal supervisory instrument 100, and make the photomultiplier tube 20 photosurface it
Outer part is fully sealed, and in other words, magnetic field and light in 20 working environment of photomultiplier tube are shielded, to keep away
The performance for exempting from the photomultiplier tube 20 is affected, it is ensured that the accuracy of the output electric signal of photomultiplier tube 20.Furthermore institute
It states photomultiplier tube 20, the tally 40 and the hardboard 50 and institute is electrically connected to using the connection type of grafting or welding
Signal-processing board 30 is stated, is interconnected directly with one another, signal transmission path is short, loss is small and transmission is stablized, to improve signal detection
Accuracy.
It is the embodiment of the embodiment of the present invention above, it is noted that those skilled in the art are come
It says, without departing from the principles of the embodiments of the present invention, several improvements and modifications can also be made, these improvements and modifications
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of photomultiplier tube shielding construction, is installed in first shell, for shielding photomultiplier tube, the first shell
Offer mounting groove, which is characterized in that the photomultiplier tube shielding construction includes shielding cylinder, and one end of the shielding cylinder is inserted embedding
In in the mounting groove, the photomultiplier tube is accommodated in the shielding cylinder, the photomultiplier tube pipe of the photomultiplier tube
Seat is located at one end that the shielding cylinder deviates from the first shell, and the shielding cylinder has magnetic field shielding effect.
2. photomultiplier tube shielding construction according to claim 1, which is characterized in that the shielding cylinder is by high magnetic permeability material
Material is made, and the high-permeability material is one of permalloy, iron, dilval, si fe alloy.
3. photomultiplier tube shielding construction according to claim 1, which is characterized in that the internal diameter of the shielding cylinder is greater than institute
The diameter for stating photomultiplier tube, when the photomultiplier tube is inserted into the shielding cylinder, the photomultiplier tube and the screen
Cover between pipe that there are gaps.
4. photomultiplier tube shielding construction according to claim 3, which is characterized in that the photomultiplier tube shielding construction
It further include the first cushion and/or the second cushion of annular, first cushion and second cushion are respectively used to
Filling seals the gap between the photomultiplier tube both ends opposite with the shielding cylinder.
5. photomultiplier tube shielding construction according to claim 4, which is characterized in that first cushion is sheathed on institute
On the outer circumference surface for stating photomultiplier transit tube socket, side axial direction projection first ring of first cushion towards the shielding cylinder
Shape boss, the first annular boss are embedded in the gap between the photomultiplier tube and the shielded-plate tube, and described first
The side that cushion is convexly equipped with the first annular boss is connected to the end face of the shielding cylinder.
6. photomultiplier tube shielding construction according to claim 4, which is characterized in that second cushion is plugged in institute
One end that shielding cylinder deviates from the photomultiplier transit tube socket is stated, second cushion is connected to the end face of the photomultiplier tube
Edge, the outer peripheral surface of second cushion are connected to the inner peripheral surface of the shielding cylinder, and second cushion is towards the light
The second annular convex platform of side axial direction projection of electric multiplier tube, second annular convex platform be embedded at the photomultiplier tube with it is described
In gap between shielding cylinder.
7. photomultiplier tube shielding construction according to claim 4, which is characterized in that first cushion and described
Two cushions use light-blocking soft material.
8. photomultiplier tube shielding construction according to claim 1, which is characterized in that the photomultiplier tube shielding construction
Further include the insulation sleeve of both ends open, is convexly equipped with protruding portion, the screen to radially inner side at the port of one end of the insulation sleeve
Cylinder is covered to be inserted into the insulation sleeve away from one end of the photomultiplier transit tube socket and be connected to the protruding portion, the insulation sleeve
For preventing the shielding cylinder to be grounded.
9. photomultiplier tube shielding construction according to claim 1, which is characterized in that the shielding cylinder is at least in outer surface
Sprays insulating material and form insulating layer, to realize electrical shielding.
10. a kind of signal supervisory instrument, the detection for faint optical signal, which is characterized in that the signal supervisory instrument includes
First shell, photomultiplier tube and photomultiplier tube shielding construction according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910711892.9A CN110416057B (en) | 2019-07-31 | 2019-07-31 | Photomultiplier shielding structure and signal detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910711892.9A CN110416057B (en) | 2019-07-31 | 2019-07-31 | Photomultiplier shielding structure and signal detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110416057A true CN110416057A (en) | 2019-11-05 |
| CN110416057B CN110416057B (en) | 2022-03-01 |
Family
ID=68365513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910711892.9A Active CN110416057B (en) | 2019-07-31 | 2019-07-31 | Photomultiplier shielding structure and signal detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110416057B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111413726A (en) * | 2020-04-22 | 2020-07-14 | 湖北大秦维康检验测试认证有限公司 | Radon detector and calibration method thereof |
| DE102022133797A1 (en) * | 2022-12-19 | 2024-06-20 | Endress+Hauser SE+Co. KG | Radiometric level measurement |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030047690A1 (en) * | 2001-09-04 | 2003-03-13 | Tatsuyo Ishidoya | Dose reading device and dose reading magazine |
| CN101166411A (en) * | 2006-10-18 | 2008-04-23 | 中国科学院高能物理研究所 | A magnetic shielding device with multi-layer compound structure for shielding strong magnetic field |
| US20080245951A1 (en) * | 2007-04-04 | 2008-10-09 | Hamamatsu Photonics K.K. | Photomultiplier tube module |
| CN201567331U (en) * | 2009-12-24 | 2010-09-01 | 广东省微生物研究所 | Rapid Bioluminescent Microbial Quantity Detector |
| JP2011128053A (en) * | 2009-12-18 | 2011-06-30 | Mitsubishi Electric Corp | Radiation detector |
| JP2013124876A (en) * | 2011-12-13 | 2013-06-24 | Hamamatsu Photonics Kk | Optical measurement device |
| CN104361916A (en) * | 2014-09-19 | 2015-02-18 | 中国船舶重工集团公司第七一九研究所 | Typical nuclide monitor of fuel element failure |
| CN105486379A (en) * | 2015-12-30 | 2016-04-13 | 黑龙江省科学院技术物理研究所 | Method for measuring material level through reflecting and scattering of adjustable high energy X-ray |
| CN109192647A (en) * | 2018-09-10 | 2019-01-11 | 江苏赛诺格兰医疗科技有限公司 | A kind of electromagnetic armouring structure of photomultiplier tube |
-
2019
- 2019-07-31 CN CN201910711892.9A patent/CN110416057B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030047690A1 (en) * | 2001-09-04 | 2003-03-13 | Tatsuyo Ishidoya | Dose reading device and dose reading magazine |
| CN101166411A (en) * | 2006-10-18 | 2008-04-23 | 中国科学院高能物理研究所 | A magnetic shielding device with multi-layer compound structure for shielding strong magnetic field |
| US20080245951A1 (en) * | 2007-04-04 | 2008-10-09 | Hamamatsu Photonics K.K. | Photomultiplier tube module |
| JP2011128053A (en) * | 2009-12-18 | 2011-06-30 | Mitsubishi Electric Corp | Radiation detector |
| CN201567331U (en) * | 2009-12-24 | 2010-09-01 | 广东省微生物研究所 | Rapid Bioluminescent Microbial Quantity Detector |
| JP2013124876A (en) * | 2011-12-13 | 2013-06-24 | Hamamatsu Photonics Kk | Optical measurement device |
| CN104361916A (en) * | 2014-09-19 | 2015-02-18 | 中国船舶重工集团公司第七一九研究所 | Typical nuclide monitor of fuel element failure |
| CN105486379A (en) * | 2015-12-30 | 2016-04-13 | 黑龙江省科学院技术物理研究所 | Method for measuring material level through reflecting and scattering of adjustable high energy X-ray |
| CN109192647A (en) * | 2018-09-10 | 2019-01-11 | 江苏赛诺格兰医疗科技有限公司 | A kind of electromagnetic armouring structure of photomultiplier tube |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111413726A (en) * | 2020-04-22 | 2020-07-14 | 湖北大秦维康检验测试认证有限公司 | Radon detector and calibration method thereof |
| CN111413726B (en) * | 2020-04-22 | 2023-11-28 | 湖北大秦维康检验测试认证有限公司 | Radon measuring instrument and calibration method thereof |
| DE102022133797A1 (en) * | 2022-12-19 | 2024-06-20 | Endress+Hauser SE+Co. KG | Radiometric level measurement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110416057B (en) | 2022-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5872758B2 (en) | Current detector | |
| US7701118B2 (en) | Ultrasonic flow rate measuring device | |
| JP4901769B2 (en) | Radiation measurement equipment | |
| CN110416057A (en) | Photomultiplier tube shielding construction and signal supervisory instrument | |
| CN101595374A (en) | Automated mechanical integrity verification | |
| JP2008131048A (en) | Probe station for semiconductor inspection with EMI shielding function | |
| JP2002261645A (en) | Radio module and electronic devices | |
| CN104813192A (en) | Magnetic sensor device | |
| JPWO2004019061A1 (en) | Radiation detector | |
| CN110411562A (en) | A kind of signal supervisory instrument | |
| WO2012114733A1 (en) | Wireless device for automated meter reading | |
| KR20120098283A (en) | Potable leakage current measurement screening magnetic flux | |
| CN217155424U (en) | Hall sensor resisting external magnetic field interference | |
| KR101328290B1 (en) | Measurement instrument | |
| US10175134B2 (en) | Physical quantity measuring device | |
| JP6366842B2 (en) | Electronic energy meter | |
| JP5993966B2 (en) | Current detector | |
| CN104567951A (en) | Dual-redundancy inductance type proximity sensor | |
| US8100018B2 (en) | Pressure transducers employing radiation hardened electronics | |
| JP2958796B2 (en) | Zero-phase current measurement sensor | |
| CN206959937U (en) | A kind of ultrasonic flowmeter gauge outfit | |
| JPH03215774A (en) | Magnetic field communication type individual exposure dosimeter | |
| JP2011252873A (en) | Radiation measuring device | |
| US7107861B2 (en) | Encoder | |
| CN212646970U (en) | Electric energy pulse counting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 518000 12th floor, building 1, Baiwang R & D building, 5158 xilishahe West Road, Nanshan District, Shenzhen City, Guangdong Province Applicant after: Shenzhen maiketian Biomedical Technology Co.,Ltd. Address before: 518000 12th floor, building 1, Baiwang R & D building, 5158 xilishahe West Road, Nanshan District, Shenzhen City, Guangdong Province Applicant before: Medcaptain Medical Technology Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |