Handheld high-sensitivity radioactive contamination detector

Abstract

The handheld high-sensitivity radioactive contamination detector comprises a control circuit, a detection circuit, a bias power supply circuit, a display circuit and a buzzer circuit, the detection circuit, the bias power supply circuit, the display circuit and the buzzer circuit are electrically connected with the control circuit, the control circuit comprises a processor U4, and the detection circuit comprises a detector U1 and a connector JP1. The second end of the connector JP1 is electrically connected with the B1 end of the detector U1, and the B1 end of the detector U1 is electrically connected with the negative electrode input end of the signal amplifier U15. According to the handheld high-sensitivity radioactive contamination detector disclosed by the utility model, the control circuit, the detection circuit, the bias power supply circuit, the display circuit and the buzzer circuit are linked, so that high-sensitivity detection is carried out on radioactive substances, and the handheld high-sensitivity radioactive contamination detector has the advantages of stable structure, convenience in operation, high practicability and the like.

Description

Technical Field

[0001] This utility model belongs to the field of radioactive pollution detection technology, specifically relating to a handheld high-sensitivity radioactive pollution detector. Background Technology

[0002] With the development and application of nuclear technology, the issue of radioactive contamination has received increasing attention. Many existing radioactive contamination detection devices, such as Gieger counters, use gas-filled tubes or chambers as probes, which are large in size, have limited sensitivity, and cannot meet the requirements for accurate detection of trace amounts of radioactive substances.

[0003] Therefore, further improvements will be made to address the aforementioned issues. Utility Model Content

[0004] The main purpose of this invention is to provide a handheld high-sensitivity radioactive contamination detector, which uses a control circuit, a detection circuit, a bias power supply circuit, a display circuit, and a buzzer circuit to work together to detect radioactive substances with high sensitivity. It has the advantages of stable structure, convenient operation, and high practicality.

[0005] To achieve the above objectives, this utility model provides a handheld high-sensitivity radioactive contamination detector, including a control circuit and a detection circuit, a (SiPM) bias power supply circuit, a display circuit, and a buzzer circuit electrically connected to the control circuit, wherein:

[0006] The control circuit includes a processor U4, and the detection circuit includes a detector U1, a connector JP1, and a signal amplifier U15. The second end of the connector JP1 is electrically connected to the B1 end of the detector U1, and the B1 end of the detector U1 is electrically connected to the negative input end of the signal amplifier U15. The output end of the signal amplifier U15 is electrically connected to pin 26 of the processor U4.

[0007] The bias power supply circuit includes an operational amplifier U8. The positive input terminal of the operational amplifier U8 is electrically connected to pin 29 of the controller U4 through a resistor R9, and the negative input terminal of the operational amplifier U8 is grounded through a resistor R50. The output terminal of the operational amplifier U8 is electrically connected to pin C3 of the detector U1 and pin 4 of the connector JP1 (for powering the detection circuit and comparing the bias voltage with the processor U4 to perform counting).

[0008] The display circuit includes a display LCD1, which is electrically connected to the processor U4;

[0009] The buzzer circuit includes a field-effect transistor Q4 and a buzzer (BUZZER1). The gate of the field-effect transistor Q4 is electrically connected to pin 95 of the processor U4 through a resistor R10, and the drain of the field-effect transistor Q4 is connected to the first terminal of the buzzer. The second terminal of the buzzer is connected to the power supply terminal (BAT_ON) through a resistor R17.

[0010] As a further preferred embodiment of the above technical solution, a resistor R50 is connected between the negative input terminal and the positive input terminal of the operational amplifier U8, a resistor R49 is connected between the negative input terminal and the output terminal of the operational amplifier U8, the output terminal of the operational amplifier U8 is grounded in sequence through resistors R11 and R31, and a capacitor C30 is connected in parallel across the two ends of resistor R31. The common terminal of resistors R11 and R31 is electrically connected to pin 16 of the processor U4.

[0011] As a further preferred embodiment of the above technical solution, pin 1 of the display LCD1 is electrically connected to pin 31 of the processor U4, pin 2 of the display LCD1 is electrically connected to pin 32 of the processor U4, pin 3 of the display LCD1 is electrically connected to pin 33 of the processor U4, and pin 4 of the display LCD1 is electrically connected to pin 34 of the processor U4.

[0012] Pin 8 of the display LCD1 is electrically connected to pin 36 of the processor U4; pin 9 of the display LCD1 is electrically connected to pin 37 of the processor U4; pin 10 of the display LCD1 is electrically connected to pin 38 of the processor U4; pin 11 of the display LCD1 is electrically connected to pin 39 of the processor U4; pin 12 of the display LCD1 is electrically connected to pin 40 of the processor U4; pin 13 of the display LCD1 is electrically connected to pin 41 of the processor U4; and pin 14 of the display LCD1 is electrically connected to... The processor U4's pin 42 is electrically connected; the display LCD1's pin 15 is electrically connected to the processor U4's pin 43; the display LCD1's pin 16 is electrically connected to the processor U4's pin 44; the display LCD1's pin 17 is electrically connected to the processor U4's pin 45; the display LCD1's pin 18 is electrically connected to the processor U4's pin 46; the display LCD1's pin 19 is electrically connected to the processor U4's pin 47; and the display LCD1's pin 20 is electrically connected to the processor U4's pin 48.

[0013] As a further preferred embodiment of the above technical solution, a diode D9 is connected between the first and second ends of the buzzer, and the anode of the diode D9 is electrically connected to the drain of the field-effect transistor Q4.

[0014] As a further preferred embodiment of the above technical solution, the end of the resistor R10 closest to the field-effect transistor Q4 is grounded through capacitor C16, and the end of the resistor R10 furthest from the field-effect transistor Q4 is grounded through resistor R28. Attached Figure Description

[0015] Figure 1 This is the control circuit diagram of this utility model.

[0016] Figure 2 This is the detection circuit diagram of this utility model.

[0017] Figure 3 This is the bias power supply circuit diagram of this utility model.

[0018] Figure 4 This is the display circuit diagram of this utility model.

[0019] Figure 5 This is the circuit diagram of the buzzer of this utility model. Detailed Implementation

[0020] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0021] This utility model discloses a handheld high-sensitivity radioactive contamination detector. The specific embodiments of the utility model are further described below with reference to preferred embodiments.

[0022] In the embodiments of this utility model, those skilled in the art will note that radioactivity and the like involved in this utility model can be considered as prior art.

[0023] Preferred embodiment.

[0024] Most radioactive detection equipment currently on the market is geared towards professional fields, such as research institutions and nuclear power plants. It is expensive and complex to use, making it difficult to provide a convenient solution for ordinary households. While traditional Gieger counters are relatively inexpensive, their sensitivity is limited and cannot meet the requirements for accurate detection of trace amounts of radioactive materials.

[0025] like Figure 1-5As shown, this utility model discloses a handheld high-sensitivity radioactive contamination detector, including a control circuit and a detection circuit, a (SiPM) bias power supply circuit, a display circuit, and a buzzer circuit electrically connected to the control circuit, wherein:

[0026] The control circuit includes a processor U4, and the detection circuit includes a detector U1 (SiPM), a connector JP1 (for connecting a CsI scintillator), and a signal amplifier U15. The second end (pin 2) of the connector JP1 is electrically connected to pin B1 of the detector U1 (for transmitting the signal collected by the scintillator to the detector U1), and pin B1 of the detector U1 is electrically connected to the negative input terminal of the signal amplifier U15. The output terminal of the signal amplifier U15 is electrically connected to pin 26 of the processor U4 (for transmitting the amplified signal to the processor U4).

[0027] The bias power supply circuit includes an operational amplifier U8. The positive input terminal of the operational amplifier U8 is electrically connected to pin 29 of the controller U4 through a resistor R9, and the negative input terminal of the operational amplifier U8 is grounded through a resistor R50. The output terminal of the operational amplifier U8 is electrically connected to pin C3 of the detector U1 and pin 4 of the connector JP1 (for powering the detection circuit and comparing the bias voltage with the processor U4 to perform counting).

[0028] The display circuit includes a display LCD1, which is electrically connected to the processor U4;

[0029] The buzzer circuit includes a field-effect transistor Q4 and a buzzer (BUZZER1). The gate of the field-effect transistor Q4 is electrically connected to pin 95 of the processor U4 through a resistor R10, and the drain of the field-effect transistor Q4 is connected to the first terminal of the buzzer. The second terminal of the buzzer is connected to the power supply terminal (BAT_ON) through a resistor R17. An alarm is triggered when the radioactivity level exceeds a preset value.

[0030] Specifically, a resistor R50 is connected between the negative input terminal and the positive input terminal of the operational amplifier U8, a resistor R49 is connected between the negative input terminal and the output terminal of the operational amplifier U8, and the output terminal of the operational amplifier U8 is grounded in sequence through resistors R11 and R31, with a capacitor C30 connected in parallel across the two ends of resistor R31. The common terminal of resistors R11 and R31 is electrically connected to pin 16 of the processor U4.

[0031] More specifically, pin 1 of the display LCD1 is electrically connected to pin 31 of the processor U4, pin 2 of the display LCD1 is electrically connected to pin 32 of the processor U4, pin 3 of the display LCD1 is electrically connected to pin 33 of the processor U4, and pin 4 of the display LCD1 is electrically connected to pin 34 of the processor U4.

[0032] Pin 8 of the display LCD1 is electrically connected to pin 36 of the processor U4; pin 9 of the display LCD1 is electrically connected to pin 37 of the processor U4; pin 10 of the display LCD1 is electrically connected to pin 38 of the processor U4; pin 11 of the display LCD1 is electrically connected to pin 39 of the processor U4; pin 12 of the display LCD1 is electrically connected to pin 40 of the processor U4; pin 13 of the display LCD1 is electrically connected to pin 41 of the processor U4; and pin 14 of the display LCD1 is electrically connected to... The processor U4's pin 42 is electrically connected; the display LCD1's pin 15 is electrically connected to the processor U4's pin 43; the display LCD1's pin 16 is electrically connected to the processor U4's pin 44; the display LCD1's pin 17 is electrically connected to the processor U4's pin 45; the display LCD1's pin 18 is electrically connected to the processor U4's pin 46; the display LCD1's pin 19 is electrically connected to the processor U4's pin 47; and the display LCD1's pin 20 is electrically connected to the processor U4's pin 48.

[0033] Furthermore, a diode D9 is connected between the first and second ends of the buzzer, and the anode of the diode D9 is electrically connected to the drain of the field-effect transistor Q4.

[0034] Furthermore, the end of resistor R10 closest to the field-effect transistor Q4 is grounded through capacitor C16, and the end of resistor R10 furthest from the field-effect transistor Q4 is grounded through resistor R28.

[0035] Regarding this utility model:

[0036] A highly sensitive detection of radioactive materials is achieved by combining a CsI scintillator and a silicon photomultiplier tube (detector U1) with a low-power ARM chip (U4). The CsI scintillator has high energy resolution and sensitivity, effectively distinguishing radiation of different energies and improving detection accuracy. The silicon photomultiplier tube, as the photoelectric conversion element of the detector, has advantages such as low power consumption, small size, and fast response.

[0037] The detection circuit receives gamma rays, and when the gamma rays interact with the detector, they generate optical signals. These signals are then processed by high voltage and amplified by an amplifier to make them stronger and easier to process.

[0038] The amplified signal is sent to the processing chip U4, which acquires the signal after filtering, shaping, and ADC conversion. During this process, a suitable low-noise bias voltage is set for the detector via the DAC, and a threshold control comparator (located inside the processing chip U4) is used. At the same time, a trigger signal is set to achieve accurate counting.

[0039] Finally, based on the collected and processed signals, the dose rate of gamma rays is calculated, thus reflecting the intensity and level of radiation.

[0040] It is worth mentioning that the radioactive and other technical features involved in this utility model patent application should be regarded as prior art. The specific structure, working principle, and possible control methods and spatial arrangement of these technical features can be adopted using conventional choices in the field, and should not be regarded as the inventive point of this utility model patent. This utility model patent will not be further elaborated in detail.

[0041] For those skilled in the art, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hand-held high-sensitivity radioactive contamination detector, characterized in that, The control circuit comprises a processor U4, the detection circuit comprises a detector U1, a connector JP1 and a signal amplifier U15, the second end of the connector JP1 is electrically connected with the B1 end of the detector U1, and the B1 end of the detector U1 is electrically connected with the negative input end of the signal amplifier U15, and the output end of the signal amplifier U15 is electrically connected with the 26 pin of the processor U4. The bias power supply circuit comprises an operational amplifier U8, the positive input end of the operational amplifier U8 is electrically connected with the 29 pin of the processor U4 through the resistor R9, and the negative input end of the operational amplifier U8 is grounded through the resistor R50, and the output end of the operational amplifier U8 is electrically connected with the C3 end of the detector U1 and the fourth end of the connector JP1 respectively. The display circuit comprises a display LCD1, and the display LCD1 is electrically connected with the processor U4. The buzzer circuit comprises a field effect transistor Q4 and a buzzer, the gate of the field effect transistor Q4 is electrically connected with the 95 pin of the processor U4 through the resistor R10, and the drain of the field effect transistor Q4 is connected with the first end of the buzzer, and the second end of the buzzer is connected with the power supply end through the resistor R17. The negative input end and the positive input end of the operational amplifier U8 are connected with the resistor R50, the negative input end and the output end of the operational amplifier U8 are connected with the resistor R49, the output end of the operational amplifier U8 is grounded in sequence through the resistor R11 and the resistor R31, the both ends of the resistor R31 are connected with the capacitor C30, and the common connection end of the resistor R11 and the resistor R31 is electrically connected with the 16 pin of the processor U4.

2. The hand-held high-sensitivity radioactive contamination detector according to claim 1, characterized in that, The 1 pin of the display LCD1 is electrically connected with the 31 pin of the processor U4, the 2 pin of the display LCD1 is electrically connected with the 32 pin of the processor U4, the 3 pin of the display LCD1 is electrically connected with the 33 pin of the processor U4, and the 4 pin of the display LCD1 is electrically connected with the 34 pin of the processor U4.

3. The hand-held high-sensitivity radioactive contamination detector according to claim 2, characterized in that, ​ The 8th pin of the display LCD1 is electrically connected with the 36th pin of the processor U4, the 9th pin of the display LCD1 is electrically connected with the 37th pin of the processor U4, the 10th pin of the display LCD1 is electrically connected with the 38th pin of the processor U4, the 11th pin of the display LCD1 is electrically connected with the 39th pin of the processor U4, the 12th pin of the display LCD1 is electrically connected with the 40th pin of the processor U4, the 13th pin of the display LCD1 is electrically connected with the 41th pin of the processor U4, the 14th pin of the display LCD1 is electrically connected with the 42th pin of the processor U4, the 15th pin of the display LCD1 is electrically connected with the 43th pin of the processor U4, the 16th pin of the display LCD1 is electrically connected with the 44th pin of the processor U4, the 17th pin of the display LCD1 is electrically connected with the 45th pin of the processor U4, the 18th pin of the display LCD1 is electrically connected with the 46th pin of the processor U4, the 19th pin of the display LCD1 is electrically connected with the 47th pin of the processor U4, and the 20th pin of the display LCD1 is electrically connected with the 48th pin of the processor U4.

4. The hand-held high-sensitivity radioactive contamination detector according to claim 1, characterized in that, The diode D9 is connected between the first end and the second end of the buzzer, and the anode of the diode D9 is electrically connected with the drain of the field effect transistor Q4.

5. The hand-held high-sensitivity radioactive contamination detector according to claim 4, characterized in that, One end of the resistor R10 close to the field effect transistor Q4 is grounded through the capacitor C16, and the other end of the resistor R10 away from the field effect transistor Q4 is grounded through the resistor R28.

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