Amplifier applied to nuclear radiation detection and nuclear radiation detection system

By integrating the high-voltage processing circuit into the amplifier circuit in the nuclear radiation detection system, the problems of system complexity and high failure rate caused by independent high-voltage power supplies are solved, and a simpler and more stable nuclear radiation measurement system is realized.

CN222167237UActive Publication Date: 2024-12-13SOUTHWESTERN INST OF PHYSICS
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Patent Information

Application Number
CN202420631956.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-29
Publication Date
2024-12-13
Estimated Expiration
2034-03-29

AI Technical Summary

Technical Problem

Existing nuclear radiation measurement systems require independent high-voltage power supplies and load high voltage onto the nuclear radiation detector through cables, resulting in complex systems, numerous components, inconvenient installation and the risk of high-voltage on-off damage to other components.

Method used

Integrate high-voltage processing circuits into amplifier circuits, including oscillation circuits, transformers, rectifier circuits and filter circuits, reducing cable laying and component counts and simplifying the system.

Benefits of technology

It realizes an integrated solution for high-voltage processing, reduces failure rate and installation complexity, and improves system stability and reliability.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an amplifier applied to nuclear radiation detection and a nuclear radiation detection system. Relates to the technical field of nuclear radiation detection. Comprising the steps that a high-voltage processing circuit stabilizes, filters, limits and isolates a direct-current low-voltage signal of a power supply to obtain a direct-current high-voltage signal; the amplifying circuit amplifies the direct-current high-voltage signal and then outputs the signal to the nuclear radiation detector; the high-voltage processing circuit comprises an oscillating circuit, a transformer, a rectifying circuit and a filtering circuit which are connected in sequence; according to the scheme, an existing nuclear radiation measurement technology is improved, the high-voltage processing circuit is integrated in the amplifying circuit, laying of cables is reduced, and installation is convenient; and the number of components of the nuclear radiation measurement system is reduced, the system is simplified, and the failure rate is reduced.
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Description

Technical Field

[0001] The utility model relates to the technical field of nuclear radiation detection, in particular to an amplifier and a nuclear radiation detection system used for nuclear radiation detection. Background Art

[0002] Nuclear radiation detectors require a DC high voltage of tens to thousands of volts to collect the charge generated by nuclear radiation. The existing nuclear radiation measurement system requires an independent high-voltage power supply and uses cables to load the high voltage to the nuclear radiation detector. At the same time, the detector charge needs to be processed by an amplifier. This solution is complex, has many components, and is inconvenient to install. The switching on and off of the independent high-voltage power supply causes the high voltage to rise and fall, which has the risk of damaging other components. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the existing nuclear radiation measurement system requires an independent high-voltage power supply and uses a cable to load the high voltage onto the nuclear radiation detector, and the charge of the detector needs to be processed by an amplifier; the utility model aims to provide an amplifier and a nuclear radiation detection system for nuclear radiation detection, improves the existing nuclear radiation measurement technology, integrates the high-voltage processing circuit into the amplification circuit, not only reduces the laying of cables and facilitates installation; but also reduces the number of components in the nuclear radiation measurement system, simplifies the system, and reduces the failure rate.

[0004] The utility model is realized by the following technical solutions:

[0005] This solution provides amplifiers for nuclear radiation detection, including:

[0006] A high-voltage processing circuit is used to perform voltage stabilization, filtering, current limiting and isolation processing on the DC low-voltage signal of the power supply to obtain a DC high-voltage signal; the high-voltage processing circuit is connected to the amplifier circuit;

[0007] An amplifier circuit is used to amplify the DC high voltage signal and output it to the nuclear radiation detector;

[0008] The high voltage processing circuit comprises: an oscillation circuit, a transformer, a rectification circuit and a filtering circuit which are connected in sequence.

[0009] Working principle of this scheme: The amplifiers used in the field of nuclear radiation measurement mainly include charge sensitive amplifiers and current sensitive amplifiers. Since charge sensitive amplifiers or current sensitive amplifiers are usually very close to nuclear radiation detectors, existing nuclear radiation measurement systems require independent high-voltage power supplies. The on and off of the independent high-voltage power supply causes the high voltage to rise and fall, and there is a great risk of damaging other components. The amplifier used for nuclear radiation detection provided by this scheme improves on the existing nuclear radiation measurement technology and integrates the high-voltage processing circuit into the amplification circuit, which not only reduces the laying of cables and facilitates installation; it also reduces the number of components in the nuclear radiation measurement system, simplifies the system, and reduces the failure rate.

[0010] The high voltage processing circuit converts the DC low voltage of the power supply into DC high voltage. The amplifier is a charge sensitive amplifier or a current amplifier composed of an operational amplifier, and its function is to amplify the voltage output by the nuclear radiation detector.

[0011] A further optimized solution is that the oscillation circuit includes: a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2 and an operational amplifier A1;

[0012] One end of the resistor R1 is grounded, and the other end is connected in series with the resistor R3 and then connected to the output end of the operational amplifier A1. The negative input end of the operational amplifier A1 is connected between the resistor R1 and the resistor R3.

[0013] One end of the capacitor C1 is grounded, and the other end is connected to the positive input terminal of the operational amplifier A1. The resistor R2 is connected in parallel on both sides of the capacitor C1; one end of the capacitor C2 is connected to the positive input terminal of the operational amplifier A1, and the other end is connected in series with the resistor R4 and then connected to the output terminal of the operational amplifier A1; the output terminal of the operational amplifier A1 is connected to the transformer.

[0014] A further optimization scheme is that the output end of the operational amplifier A1 is connected to the first end of the transformer, and the second end of the transformer is grounded; the third end and the fourth end of the transformer are connected to the rectifier circuit, wherein the first end and the third end of the transformer are the same end, and the second end and the fourth end are the same end.

[0015] A further optimization scheme is that the resistor R1 is 1 kΩ, the resistor R2 is 2.4 kΩ, the resistor R3 and the resistor R4 are both 1 kΩ, and the capacitors C1 and C2 are both 100 nF.

[0016] A further optimized solution is that the rectifier circuit includes: a diode D1, a diode D2, a diode D3 and a diode D4;

[0017] The cathode of the diode D1 is connected to the anode of the diode D2, the cathode of the diode D2 is connected to the cathode of the diode D3, and the anode of the diode D3 is connected to the cathode of the diode D4;

[0018] The third end of the transformer is connected between the diode D1 and the diode D2, and the fourth end of the transformer is connected between the diode D3 and the diode D4.

[0019] A further optimized solution is that the filtering circuit includes a capacitor C3, one end of the capacitor C3 is connected between the diode D1 and the diode D4, and the other end of the capacitor C3 is connected between the diode D2 and the diode D3.

[0020] A further optimization solution is that the high voltage processing circuit further includes a current limiting resistor R5, and the current limiting resistor R5 is connected between the filter circuit and the amplifier circuit.

[0021] A further optimized solution is that the amplifying circuit includes: a resistor R6, a capacitor C5 and an operational amplifier A2;

[0022] One end of the resistor R6 is connected to the current limiting resistor R5, and the other end is connected to the output end of the operational amplifier A2; the capacitor C5 is connected in parallel to both sides of the resistor R6; and the output end of the operational amplifier A2 is connected to the nuclear radiation detector.

[0023] A further optimization scheme is that the amplifying circuit further includes a DC blocking capacitor C4, and the DC blocking capacitor C4 is connected between the resistor R6 and the current limiting resistor R5.

[0024] The present solution also provides a nuclear radiation detection system, comprising the above-mentioned amplifier for nuclear radiation detection.

[0025] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0026] The utility model aims to provide an amplifier and a nuclear radiation detection system for nuclear radiation detection, which improves the existing nuclear radiation measurement technology and integrates a high-voltage processing circuit into an amplifier circuit, which not only reduces the laying of cables and facilitates installation, but also reduces the number of components in the nuclear radiation measurement system, simplifies the system, and reduces the failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0028] Figure 1 This is a schematic diagram of the amplifier circuit structure used for nuclear radiation detection. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0030] Nuclear radiation detectors require a DC high voltage of tens to thousands of volts to collect the charge generated by nuclear radiation. The existing nuclear radiation measurement system requires an independent high-voltage power supply and uses cables to load the high voltage to the nuclear radiation detector. At the same time, the detector charge needs to be processed by an amplifier. This solution is complex, has many components, and is inconvenient to install. The switching on and off of the independent high-voltage power supply causes the high voltage to rise and fall, which has the risk of damaging other components.

[0031] The existing nuclear radiation measurement system requires an independent high-voltage power supply and uses a cable to load the high voltage to the nuclear radiation detector. At the same time, the charge of the detector needs to be processed by an amplifier. In view of this, the utility model provides the following embodiments to solve the above technical problems:

[0032] Example 1

[0033] This embodiment provides an amplifier for nuclear radiation detection, including:

[0034] A high-voltage processing circuit is used to perform voltage stabilization, filtering, current limiting and isolation processing on the DC low-voltage signal of the power supply to obtain a DC high-voltage signal; the high-voltage processing circuit is connected to the amplifier circuit;

[0035] An amplifier circuit is used to amplify the DC high voltage signal and output it to the nuclear radiation detector;

[0036] The high voltage processing circuit comprises: an oscillation circuit, a transformer, a rectification circuit and a filtering circuit which are connected in sequence.

[0037] like Figure 1 As shown, the oscillation circuit includes: a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2 and an operational amplifier A1;

[0038] One end of the resistor R1 is grounded, and the other end is connected in series with the resistor R3 and then connected to the output end of the operational amplifier A1. The negative input end of the operational amplifier A1 is connected between the resistor R1 and the resistor R3.

[0039] One end of the capacitor C1 is grounded, and the other end is connected to the positive input terminal of the operational amplifier A1. The resistor R2 is connected in parallel on both sides of the capacitor C1; one end of the capacitor C2 is connected to the positive input terminal of the operational amplifier A1, and the other end is connected in series with the resistor R4 and then connected to the output terminal of the operational amplifier A1; the output terminal of the operational amplifier A1 is connected to the transformer.

[0040] The output end of the operational amplifier A1 is connected to the first end of the transformer, and the second end of the transformer is grounded; the third end and the fourth end of the transformer are connected to the rectifier circuit, wherein the first end and the third end of the transformer are the same end, and the second end and the fourth end are the same end.

[0041] The resistor R1 is 1 kΩ, the resistor R2 is 2.4 kΩ, the resistor R3 and the resistor R4 are both 1 kΩ, and the capacitor C1 and the capacitor C2 are both 100 nF.

[0042] The rectifier circuit includes: a diode D1, a diode D2, a diode D3 and a diode D4;

[0043] The cathode of the diode D1 is connected to the anode of the diode D2, the cathode of the diode D2 is connected to the cathode of the diode D3, and the anode of the diode D3 is connected to the cathode of the diode D4;

[0044] The third end of the transformer is connected between the diode D1 and the diode D2, and the fourth end of the transformer is connected between the diode D3 and the diode D4.

[0045] The filter circuit includes a capacitor C3 , one end of which is connected between the diode D1 and the diode D4 , and the other end of which is connected between the diode D2 and the diode D3 .

[0046] The high voltage processing circuit further includes a current limiting resistor R5, which is connected between the filter circuit and the amplifier circuit.

[0047] The amplifier circuit includes: a resistor R6, a capacitor C5 and an operational amplifier A2;

[0048] One end of the resistor R6 is connected to the current limiting resistor R5, and the other end is connected to the output end of the operational amplifier A2; the capacitor C5 is connected in parallel to both sides of the resistor R6; and the output end of the operational amplifier A2 is connected to the nuclear radiation detector.

[0049] The amplifier circuit further includes a DC blocking capacitor C4, which is connected between the resistor R6 and the current limiting resistor R5.

[0050] Amplifiers used in the field of nuclear radiation measurement mainly include charge sensitive amplifiers and current sensitive amplifiers. Since charge sensitive amplifiers or current sensitive amplifiers are usually very close to nuclear radiation detectors, existing nuclear radiation measurement systems require independent high-voltage power supplies. The on and off of the independent high-voltage power supply causes the high voltage to rise and fall, and there is a great risk of damaging other components. The amplifier used for nuclear radiation detection provided by this solution improves on the existing nuclear radiation measurement technology and integrates the high-voltage processing circuit into the amplification circuit, which not only reduces the laying of cables and facilitates installation; it also reduces the number of components in the nuclear radiation measurement system, simplifies the system, and reduces the failure rate.

[0051] Example 2

[0052] This embodiment provides a nuclear radiation detection system, including the amplifier for nuclear radiation detection of embodiment 1. The operational amplifier A1 and resistors R1, R2, R3, R4, capacitors C1 and C2 form an oscillation circuit, T is a transformer, diodes D1 to D4 form a rectifier circuit, capacitor C3 is a filter circuit, resistor R5 is a current limiting resistor, capacitor C4 is a DC blocking capacitor, and operational amplifier A2, capacitor C5 and resistor R6 form an amplifier circuit. The oscillation circuit, transformer, rectifier circuit and filter circuit convert the DC low voltage of the power supply into a DC high voltage and output it to the nuclear radiation detector.

[0053] In this embodiment, operational amplifier A1 is an operational amplifier such as OP27, LM358, etc., resistor R1 is 1kΩ, resistor R2 is 2.4kΩ, resistor R3 and resistor R4 are 1kΩ, capacitor C1 and capacitor C2 are 100nF, capacitor C3 and capacitor C4 are 10nF and 3000V respectively, resistor R5 and resistor R6 are 10MΩ, capacitor C4 is 1pF, and operational amplifier A2 is an operational amplifier such as OPA657, AD8056, OPA275, etc.

[0054] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An amplifier for nuclear radiation detection, characterized in that: include: The high-voltage processing circuit is used to stabilize, filter, limit current and isolate the DC low-voltage signal of the power supply to obtain a DC high-voltage signal; The high voltage processing circuit is connected to the amplifier circuit; An amplifier circuit is used to amplify the DC high voltage signal and output it to the nuclear radiation detector; The high voltage processing circuit comprises: an oscillation circuit, a transformer, a rectification circuit and a filtering circuit which are connected in sequence.

2. The amplifier for nuclear radiation detection according to claim 1, characterized in that: The oscillation circuit comprises: a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2 and an operational amplifier A1; One end of the resistor R1 is grounded, and the other end is connected in series with the resistor R3 and then connected to the output end of the operational amplifier A1. The negative input end of the operational amplifier A1 is connected between the resistor R1 and the resistor R3. One end of the capacitor C1 is grounded, and the other end is connected to the positive input terminal of the operational amplifier A1. The resistor R2 is connected in parallel on both sides of the capacitor C1; one end of the capacitor C2 is connected to the positive input terminal of the operational amplifier A1, and the other end is connected in series with the resistor R4 and then connected to the output terminal of the operational amplifier A1; the output terminal of the operational amplifier A1 is connected to the transformer.

3. The amplifier for nuclear radiation detection according to claim 2, characterized in that: The output end of the operational amplifier A1 is connected to the first end of the transformer, and the second end of the transformer is grounded; the third end and the fourth end of the transformer are connected to the rectifier circuit, wherein the first end and the third end of the transformer are the same end, and the second end and the fourth end are the same end.

4. The amplifier for nuclear radiation detection according to claim 2, characterized in that: The resistor R1 is 1 kΩ, the resistor R2 is 2.4 kΩ, the resistor R3 and the resistor R4 are both 1 kΩ, and the capacitor C1 and the capacitor C2 are both 100 nF.

5. The amplifier for nuclear radiation detection according to claim 2, characterized in that: The rectifier circuit includes: a diode D1, a diode D2, a diode D3 and a diode D4; The cathode of the diode D1 is connected to the anode of the diode D2, the cathode of the diode D2 is connected to the cathode of the diode D3, and the anode of the diode D3 is connected to the cathode of the diode D4; The third end of the transformer is connected between the diode D1 and the diode D2, and the fourth end of the transformer is connected between the diode D3 and the diode D4.

6. The amplifier for nuclear radiation detection according to claim 5, characterized in that: The filter circuit includes a capacitor C3, one end of which is connected between the diode D1 and the diode D4, and the other end of which is connected between the diode D2 and the diode D3.

7. The amplifier for nuclear radiation detection according to claim 1, characterized in that: The high voltage processing circuit further includes a current limiting resistor R5, and the current limiting resistor R5 is connected between the filter circuit and the amplifier circuit.

8. The amplifier for nuclear radiation detection according to claim 7, characterized in that: The amplifying circuit comprises: a resistor R6, a capacitor C5 and an operational amplifier A2; One end of the resistor R6 is connected to the current limiting resistor R5, and the other end is connected to the output end of the operational amplifier A2; the capacitor C5 is connected in parallel to both sides of the resistor R6; and the output end of the operational amplifier A2 is connected to the nuclear radiation detector.

9. The amplifier for nuclear radiation detection according to claim 8, characterized in that: The amplifier circuit further includes a DC blocking capacitor C4, which is connected between the resistor R6 and the current limiting resistor R5.

10. A nuclear radiation detection system, characterized in that: An amplifier for nuclear radiation detection comprising the amplifier described in any one of claims 1 to 9.