CN202837424U - Photoelectric weak signal detection system - Google Patents
Photoelectric weak signal detection system Download PDFInfo
- Publication number
- CN202837424U CN202837424U CN 201220410473 CN201220410473U CN202837424U CN 202837424 U CN202837424 U CN 202837424U CN 201220410473 CN201220410473 CN 201220410473 CN 201220410473 U CN201220410473 U CN 201220410473U CN 202837424 U CN202837424 U CN 202837424U
- Authority
- CN
- China
- Prior art keywords
- vacuum chamber
- transmission line
- trans
- impedance amplifier
- screen layer
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Measurement Of Radiation (AREA)
Abstract
The utility model discloses a photoelectric weak signal detection system, comprising a vacuum chamber. A detector array is arranged in the vacuum chamber, a flange is in sealing installation at one side of the vacuum chamber, and a trans-impedance amplifier and an acquisition system are arranged on the outside of the vacuum chamber; a multichannel signal output end of each detector in the vacuum chamber is connected with a transmission line in the vacuum chamber respectively, the transmission line in the vacuum chamber penetrates the flange to be connected with a transmission line outside the vacuum chamber, and the other end of the transmission line outside the vacuum chamber is accessed in the signal input end of the trans-impedance amplifier; the trans-impedance amplifier is placed in a chassis, the signal output end of the trans-impedance amplifier is accessed in the signal input end of the acquisition system, and the acquisition system is in single point grounding. By designing a weak signal detection circuit, the photoelectric weak signal detection system of the utility model combines an electromagnetic compatible principle to arrange a circuit board and a diagnosis system, so that the gain ranges of a soft X-ray and an XUV diagnosis system detection circuit reach between 2*105 V/A and 5*106 V/A, the bandwidths reach 100k HZ, the noise is maintained below 20 mV under an EAST strong electromagnetic field environment, and the photoelectric weak signal detection system is stable in performance and reliable in data.
Description
Technical field
The utility model relates generally to photoelectric field, relates in particular to a kind of photoelectricity Weak Signal Detection System for grenz ray and XUV diagnostic system.
Background technology
The photoelectricity Weak Signal Detection System mainly is divided into two parts, and a part is Weak Signal Detecting Circuit, and another part is the electromagnetic compatibility of system.At present, the circuit structure of signal detection system that is used for grenz ray and XUV diagnostic system is simple, only used preposition electric current to amplify and the rear class voltage amplification, the bandwidth characteristic of amplifier and feedback resistance and feedback capacity combination have filter action to useful signal, but noise is not but played a good filtration, particularly high frequency noise is easy to arrive output terminal by Circuits System, can only be by the bandwidth characteristic restriction certain to generating high frequency noise of amplifier.For the inhibition of external disturbance, it is particularly important that the design of electromagnetic compatibility seems, the noise that interference noise brings to circuit output is often greater than the intrinsic noise of circuit.Complicacy and the high strength of EAST Tokamak electromagnetic field environment, grenz ray and XUV diagnostic system are by multiple tracks signal (100 multiple tracks) and the ground mode of allying the communists, and length of transmission line large (from the detector to the collection, reaching 70 meters), the difficulty of crosstalking that suppresses between external interference noise and the signal is strengthened.
The utility model content
The utility model technical issues that need to address are: a kind of rational Weak Signal Detecting Circuit scheme is provided, make the Multi-path signal detecting circuit plate, adopt electromagnetic compatibility technology that rational layout is carried out in the design of diagnostic system and PCB, thus obtain signal to noise ratio (S/N ratio) preferably the switching signal of grenz ray and XUV be used for physical analysis.
For achieving the above object, technical solution adopted in the utility model is:
The photoelectricity Weak Signal Detection System, include vacuum chamber, it is characterized in that: in the described vacuum chamber detector array is installed, one side seal of vacuum chamber is equipped with flange, vacuum chamber is provided with trans-impedance amplifier outward, acquisition system, the multiple tracks signal output part that is arranged in every detector of vacuum chamber is connected with respectively the vacuum chamber transmission line, the interior transmission line of vacuum chamber passes flange and is connected with the outer transmission line of vacuum chamber, the signal input part of the other end access trans-impedance amplifier of the outer transmission line of vacuum chamber, trans-impedance amplifier places a cabinet, the signal input part of the signal output part access acquisition system of trans-impedance amplifier, the acquisition system single-point grounding; The transmission line employing can be used for vacuum and hot environment in the vacuum chamber, and with the twisted-pair feeder of screen layer, the screen layer of transmission line adopts the glass tape colligation in the vacuum chamber, the outer transmission line of vacuum chamber adopts the twisted-pair feeder with screen layer, the outer wrap insulate layer of the screen layer of the outer transmission line of vacuum chamber, the screen layer front end of transmission line links to each other with the metal shell of parcel detector in the vacuum chamber, tail end is connected with the shell of the cabinet of trans-impedance amplifier by a long lead that passes flange, flange also is connected by the shell of wire with the cabinet of trans-impedance amplifier, the screen layer front end of the outer transmission line of vacuum chamber is unsettled, and the rear end is connected with the shell of the cabinet of trans-impedance amplifier.
The signal output part of described trans-impedance amplifier is by the signal input part of the outer transmission line two access acquisition systems of vacuum chamber, and the screen layer at the two ends of the outer transmission line two of vacuum chamber is connected with the shell of the cabinet of trans-impedance amplifier, the earth terminal of acquisition system respectively.
The utility model adopts trans-impedance amplifier to realize that the detector array output current is to the conversion of voltage, solved well the contradiction of signal gain and bandwidth, use phase compensation principle that the phase place of circuit is compensated, the resonance holding circuit stable performance of namely having eliminated circuit does not affect again the bandwidth of signal; Can add active second-order low-pass filter between trans-impedance amplifier and the acquisition system, bandwidth is the bandwidth of front end signal, is used for the filtering to the high frequency noise of front end current amplifier output, has effectively reduced the impact that various high frequency noises bring to circuit.If need larger gain, can add again one-level reverse voltage amplifying circuit in final stage.In addition, add electric source filter circuit, the noise that produces to reduce voltage fluctuation introducing ripple.
Signal transmssion line adopts the twisted-pair feeder with screen layer in the vacuum chamber of the present utility model, the screen layer front end links to each other with the metal shell of parcel detector, the screen layer tail end is guided to outside the vacuum chamber by flange 32 core Aviation Connector with wire, the casing of access trans-impedance amplifier.Vacuum chamber external signal transmission line adopts the twisted-pair feeder with screen layer, and the screen layer skin has insulation course, and transmission line front end Aviation Connector end shield layer suspends, the acquisition system that the access of back end signal line designs, the casing of screen layer access trans-impedance amplifier.
The beneficial effects of the utility model are:
The utility model to circuit board and diagnostic system layout, makes grenz ray and XUV diagnostic system testing circuit gain margin reach 2*10 in conjunction with compatible principle of electromagnetism by the design of Weak Signal Detecting Circuit
5V/A is to 5*10
6V/A, bandwidth reaches 100kHz, and noise maintains below the 20mV under EAST strong-electromagnetic field environment, and stable performance, and data are reliable.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Fig. 1 is theory diagram of the present utility model.
Embodiment
As shown in Figure 1, the photoelectricity Weak Signal Detection System, include vacuum chamber, detector array 1 is installed in the vacuum chamber, one side seal of vacuum chamber is equipped with flange 2, the vacuum chamber 1 outer trans-impedance amplifier 3 that is provided with, acquisition system 4, the signal output part that is arranged in every detector of vacuum chamber is connected with respectively vacuum chamber transmission line 5, the interior transmission line 5 of vacuum chamber passes flange 4 and is connected with the outer transmission line 6 of vacuum chamber, the signal input part of the other end access trans-impedance amplifier 3 of the outer transmission line 6 of vacuum chamber, trans-impedance amplifier places a cabinet 7, the signal input part of the signal output part access acquisition system 4 of trans-impedance amplifier 3, acquisition system 4 single-point groundings; The twisted-pair feeder that transmission line 5 adopts with screen layer in the vacuum chamber, the screen layer of transmission line adopts the glass tape colligation in the vacuum chamber, the twisted-pair feeder that the outer transmission line 6 of vacuum chamber adopts with screen layer, the outer wrap insulate layer of the screen layer of the outer transmission line 6 of vacuum chamber, the screen layer front end of transmission line 5 links to each other with the metal shell of parcel detector in the vacuum chamber, tail end is connected with the shell of the cabinet 7 of trans-impedance amplifier 3 by a long lead 8 that passes flange 2, flange 2 also is connected with the shell of the cabinet 7 of trans-impedance amplifier 3 by wire 9, the screen layer front end of the outer transmission line 6 of vacuum chamber is unsettled, and the rear end is connected with the shell of the cabinet 7 of trans-impedance amplifier 3.
The signal output part of trans-impedance amplifier 3 is by the signal input part of the outer transmission line 2 10 access acquisition systems of vacuum chamber, and the screen layer at the two ends of the outer transmission line 2 10 of vacuum chamber is connected with the shell of the cabinet 7 of trans-impedance amplifier 3, the earth terminal of acquisition system 4 respectively.
The twisted-pair feeder that signal transmssion line 5 adopts with screen layer in the vacuum chamber, the screen layer of multiple tracks signal is in contact with one another, and twines with glass tape, reduces the slit between signal and the signal, to reduce the circuit loop area; The screen layer front end links to each other with the metal shell of parcel detector, but can not join with the detector array common ground, and the screen layer tail end is guided to outside the vacuum chamber by flange 32 core Aviation Connector with wire, cabinet 7 shells of access trans-impedance amplifier 3.Vacuum chamber external signal transmission line adopts the twisted-pair feeder with screen layer, the screen layer skin has insulation course, the binding strap colligation of multiplexing line, transmission line front end Aviation Connector end shield layer suspends, back end signal line access Weak Signal Detecting Circuit, cabinet 7 shells of screen layer access trans-impedance amplifier 3.The testing circuit plate places the shielding plug-in unit, plug-in unit access chassis power supply, and cabinet places the shielding rack.With a wire flange is accessed casing.Power supply adopts isolating transformer, eliminates earth loop.All front-end circuit equipment are in suspended state, arrive by output line at last to gather, and screen layer links to each other with ground wire, last collection terminal single-point grounding.
Claims (2)
1. photoelectricity Weak Signal Detection System, include vacuum chamber, it is characterized in that: in the described vacuum chamber detector array is installed, one side seal of vacuum chamber is equipped with flange, vacuum chamber is provided with trans-impedance amplifier outward, acquisition system, the multiple tracks signal output part that is arranged in every detector of vacuum chamber is connected with respectively the vacuum chamber transmission line, the interior transmission line of vacuum chamber passes flange and is connected with the outer transmission line of vacuum chamber, the signal input part of the other end access trans-impedance amplifier of the outer transmission line of vacuum chamber, trans-impedance amplifier places a cabinet, the signal input part of the signal output part access acquisition system of trans-impedance amplifier, the acquisition system single-point grounding; Transmission line adopts the twisted-pair feeder with screen layer in the vacuum chamber, the screen layer of transmission line adopts the glass tape colligation in the vacuum chamber, the outer transmission line of vacuum chamber adopts the twisted-pair feeder with screen layer, the outer wrap insulate layer of the screen layer of the outer transmission line of vacuum chamber, the screen layer front end of transmission line links to each other with the metal shell of parcel detector in the vacuum chamber, tail end is connected with the shell of the cabinet of trans-impedance amplifier by a long lead that passes flange, flange also is connected by the shell of wire with the cabinet of trans-impedance amplifier, the screen layer front end of the outer transmission line of vacuum chamber is unsettled, and the rear end is connected with the shell of the cabinet of trans-impedance amplifier.
2. photoelectricity Weak Signal Detection System according to claim 1, it is characterized in that: the signal output part of described trans-impedance amplifier is by the signal input part of the outer transmission line two access acquisition systems of vacuum chamber, and the screen layer at the two ends of the outer transmission line two of vacuum chamber is connected with the shell of the cabinet of trans-impedance amplifier, the earth terminal of acquisition system respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220410473 CN202837424U (en) | 2012-08-17 | 2012-08-17 | Photoelectric weak signal detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220410473 CN202837424U (en) | 2012-08-17 | 2012-08-17 | Photoelectric weak signal detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202837424U true CN202837424U (en) | 2013-03-27 |
Family
ID=47949100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220410473 Expired - Fee Related CN202837424U (en) | 2012-08-17 | 2012-08-17 | Photoelectric weak signal detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202837424U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399201A (en) * | 2013-08-16 | 2013-11-20 | 中国科学院微电子研究所 | Universal detection chip system for weak signals of sensor |
| CN104600405B (en) * | 2015-01-19 | 2017-04-12 | 西安航天动力研究所 | Over-vacuum water cooling radio frequency transmission line |
| CN106772540A (en) * | 2016-11-29 | 2017-05-31 | 华中科技大学 | A kind of hard X ray flux detecting system of J TEXT tokamak devices |
| CN109714926A (en) * | 2019-03-01 | 2019-05-03 | 江苏尚飞光电科技股份有限公司 | The novel long-line transmission system with transmission is acquired for small-signal |
-
2012
- 2012-08-17 CN CN 201220410473 patent/CN202837424U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399201A (en) * | 2013-08-16 | 2013-11-20 | 中国科学院微电子研究所 | Universal detection chip system for weak signals of sensor |
| CN103399201B (en) * | 2013-08-16 | 2016-01-20 | 中国科学院微电子研究所 | Universal detection chip system for weak signals of sensor |
| CN104600405B (en) * | 2015-01-19 | 2017-04-12 | 西安航天动力研究所 | Over-vacuum water cooling radio frequency transmission line |
| CN106772540A (en) * | 2016-11-29 | 2017-05-31 | 华中科技大学 | A kind of hard X ray flux detecting system of J TEXT tokamak devices |
| CN109714926A (en) * | 2019-03-01 | 2019-05-03 | 江苏尚飞光电科技股份有限公司 | The novel long-line transmission system with transmission is acquired for small-signal |
| CN109714926B (en) * | 2019-03-01 | 2024-01-16 | 江苏尚飞光电科技股份有限公司 | Novel long-line transmission system for weak signal acquisition and transmission |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202837424U (en) | Photoelectric weak signal detection system | |
| EP3255770B1 (en) | Filter and power supply system | |
| Piipponen et al. | A biosignal instrumentation system using capacitive coupling for power and signal isolation | |
| CN103091524B (en) | A kind of screening arrangement of cable oscillation wave partial discharge detection system | |
| CN211742679U (en) | Out-of-pile nuclear measurement system source range amplifier | |
| CN101533049A (en) | Current radiation transmitting device for measuring cable | |
| CN101931167A (en) | Switch cabinet bus arrangement connecting structure | |
| CN106385241A (en) | High-sensitivity current amplifier applicable to fusion reactor strong electromagnetic environment | |
| CN203193504U (en) | Power supply adapter for proofing information leakage | |
| CN201674226U (en) | Filter for inhibiting conduction of electromagnetic interference in power grid | |
| CN201945347U (en) | Flowmeter pretreatment instrument | |
| CN202586351U (en) | Suppression device for power frequency interference signal of power transmission line | |
| CN201752412U (en) | Electrode for non-interference electrophysiological detection | |
| CN210351109U (en) | Partial discharge input signal isolation filter device | |
| CN203933000U (en) | 3G lightning protection overvoltage protector | |
| CN102832892B (en) | A kind of star Ku band power amplifiers | |
| CN201673703U (en) | Single-end-shielded measuring cable for power system | |
| CN208754250U (en) | A kind of power amplifier device | |
| CN203705484U (en) | Multi-path weak signal shielding, transmitting and grounding combined structure applied in electromagnetic environment | |
| CN201360388Y (en) | Box body panel of filter | |
| CN203551614U (en) | Electromagnetic isolation device of a synchronous control system | |
| CN201418064Y (en) | Filter for an electronic beam processing apparatus | |
| CN219499352U (en) | Charge sensitive preamplifier | |
| CN216021085U (en) | Analog front end AFE circuit and device for EEG signal acquisition | |
| CN202600157U (en) | Neutron detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20180817 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |