Multi-channel counter and detection equipment

Abstract

The embodiment of the invention provides a multi-channel counter and detection equipment, and relates to the technical field of radioactive particle detection. Comprising a detection unit and a signal processing unit, the detection unit comprises an anticoincidence detection module and a plurality of PIPS detection modules, the anticoincidence detection module and each PIPS detection module are electrically connected with the signal processing unit, and each PIPS detection module is used for detecting a sample to be detected; the anticoincidence detection module is used for detecting cosmic rays and environmental background signals to obtain anticoincidence signals; the PIPS detection module is used for carrying out radioactive particle detection on a to-be-detected sample to obtain a particle signal; and the signal processing unit is used for collecting the particle signals obtained by the PIPS detection modules and the anticoincidence signals obtained by the anticoincidence detection modules, and processing the particle signals and the anticoincidence signals to obtain statistical spectrograms corresponding to the to-be-detected samples. Therefore, the detection efficiency, the measurement precision and the particle resolution can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of radioactive particle detection, and in particular to a multi-channel counter and detection equipment. Background Art

[0002] At present, in pressurized water reactor nuclear power plants, when the reactor coolant pipeline is damaged, nuclear fission products will discharge radioactive gaseous substances such as aerosols, iodine, and inert gases through facilities such as steam generators. These gases will be discharged through the plant ventilation system, causing radioactive contamination. In addition, in the event of an accident, the radioactive gaseous substances leaked from the reactor may also be suspended in the surrounding air environment and enter the human body through breathing, causing serious internal exposure.

[0003] Based on this, in order to effectively evaluate the impact of these radioactive materials on their surrounding environment and avoid harm to operators, it is necessary to conduct radioactive particle detection on these radioactive materials, such as detection of alpha particles and beta particles.

[0004] In the prior art, when detecting radioactive particles, there are often problems such as low detection efficiency, poor particle resolution and measurement accuracy. Summary of the invention

[0005] In view of this, the purpose of the present application is to provide a multi-channel counter and detection equipment to improve detection efficiency, measurement accuracy and particle resolution.

[0006] In order to achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0007] In a first aspect, the present invention provides a multi-channel counter, comprising a detection unit and a signal processing unit, wherein the detection unit comprises an anti-coincidence detection module and a plurality of PIPS detection modules, and the anti-coincidence detection module and each of the PIPS detection modules are electrically connected to the signal processing unit, and each of the PIPS detection modules is used to detect a sample to be tested;

[0008] The anti-coincidence detection module is used to detect cosmic rays and environmental background signals to obtain anti-coincidence signals;

[0009] The PIPS detection module is used to detect radioactive particles in the sample to be tested and obtain particle signals;

[0010] The signal processing unit is used to collect the particle signals obtained by each of the PIPS detection modules and the anti-coincidence signals obtained by the anti-coincidence detection module, process each of the particle signals and the anti-coincidence signals, and obtain the statistical spectra corresponding to each of the samples to be tested.

[0011] In an optional embodiment, the signal processing unit includes a particle signal acquisition circuit, an anti-coincidence amplification circuit and a logic unit;

[0012] The particle signal acquisition circuit is electrically connected to the plurality of PIPS detection modules, the anti-coincidence amplification circuit is electrically connected to the anti-coincidence detection module, and both the particle signal acquisition circuit and the anti-coincidence amplification circuit are electrically connected to the logic unit;

[0013] The particle signal acquisition circuit is used to collect the particle signals acquired by each of the PIPS detection modules, convert the particle signals into digital signals, and send the converted particle signals to the logic unit;

[0014] The anti-coincidence amplifying circuit is used to collect the anti-coincidence signal obtained by the anti-coincidence detection module, amplify and convert the anti-coincidence signal, and send the processed anti-coincidence signal to the logic unit;

[0015] The logic unit is used to process each of the particle signals according to the reception time of each of the particle signals and the anti-coincidence signal.

[0016] In an optional embodiment, the logic unit is also used to delete the particle signal when the reception time of the particle signal and the anti-coincidence signal is the same time, and to extract the amplitude of the particle signal when the reception time of the particle signal and the anti-coincidence signal is not the same time, and to generate a statistical spectrum corresponding to the particle signal according to the amplitude of the particle signal.

[0017] In an optional embodiment, the PIPS detection module includes a PIPS detector and a preamplifier, the PIPS detector and the preamplifier are electrically connected, and the preamplifier is electrically connected to the particle signal acquisition circuit;

[0018] The PIPS detector is used to detect radioactive particles on the sample to be tested and obtain an initial particle signal;

[0019] The preamplifier is used to amplify the initial particle signal to obtain the particle signal.

[0020] In an optional implementation, the multi-channel counter further includes a communication module, and the communication module is connected to the signal processing unit and the host computer device respectively;

[0021] The communication module is used to obtain the statistical spectrum sent by the signal processing unit and send the statistical spectrum to the host computer device.

[0022] In an optional embodiment, the multi-channel counter further includes a first power supply module and a second power supply module, the first power supply module is electrically connected to the signal processing unit and the second power supply module respectively, and the second power supply module is electrically connected to the anti-coincidence detection module and each of the PIPS detection modules respectively;

[0023] The first power supply module is used to supply power to the signal processing unit and the second power supply module;

[0024] The second power supply module is used to supply power to the anti-coincidence detection module and the PIPS detection module.

[0025] In an optional embodiment, the second power supply module includes an anti-coincidence high-voltage circuit and a PIPS preamplifier power supply circuit, the anti-coincidence high-voltage circuit is electrically connected to the anti-coincidence detection module, and the PIPS preamplifier power supply circuit is electrically connected to each of the PIPS detection modules;

[0026] The anti-coincidence high-voltage circuit is used to provide high voltage for the anti-coincidence detection module;

[0027] The PIPS preamplifier power supply circuit is used to supply power to each of the PIPS detection modules.

[0028] In an optional embodiment, the multi-channel counter further includes a plurality of indicator light modules, each of which is electrically connected to the signal processing unit, and each of which corresponds to the PIPS detection module one by one;

[0029] The indicator light module is used to receive the control signal of the signal processing unit and send out an indication signal according to the control signal; the indication signal is used to represent the operating status of the PIPS detection module corresponding to the indicator light module.

[0030] In an optional embodiment, the multi-channel counter further includes a plurality of travel switches, each of the travel switches corresponds one-to-one to the PIPS detection module, and the plurality of travel switches are electrically connected to the signal processing unit;

[0031] The signal processing unit is used to determine whether to collect the particle signal from the PIPS detection module corresponding to the travel switch according to the closed state of each travel switch.

[0032] In a second aspect, the present invention provides a detection device, comprising the multi-channel counter described in any one of the aforementioned embodiments.

[0033] The multi-channel counter and detection equipment provided in the embodiment of the present application use a PIPS (Passive Implanted Planar Silicon) detection module to detect the radioactive particles of the sample to be tested, thereby obtaining a particle signal. Since PIPS is a junction detector, its contact surface is formed by ion implantation, and an accurate, thin and sudden junction can be obtained, thereby improving the resolution of radioactive particles. In addition, cosmic rays and environmental background signals can be detected by an anti-coincidence detection module, and the signal processing unit can combine the particle signal and the anti-coincidence signal for processing to obtain a statistical map of the sample to be tested, thereby eliminating the influence of cosmic rays and environmental background signals on the measurement of radioactive particles, and improving the accuracy of radioactive particle measurement. And since the multi-channel counter includes multiple PIPS detection modules, each PIPS detection module is used to detect a sample to be tested, so multiple samples to be tested can be detected at the same time, thereby improving the detection efficiency.

[0034] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A block diagram of a multi-channel counter provided in an embodiment of the present application is shown;

[0037] Figure 2 An example diagram of the configuration of the anti-coincidence detection module is shown;

[0038] Figure 3 Another block diagram of a multi-channel counter provided in an embodiment of the present application is shown;

[0039] Figure 4 Another block diagram of a multi-channel counter provided in an embodiment of the present application is shown;

[0040] Figure 5 Another block diagram of a multi-channel counter provided in an embodiment of the present application is shown;

[0041] Figure 6 Another block diagram of a multi-channel counter provided in an embodiment of the present application is shown;

[0042] Figure 7 Another block diagram of a multi-channel counter provided in an embodiment of the present application is shown;

[0043] Figure 8 Another block diagram of a multi-channel counter provided in an embodiment of the present application is shown;

[0044] Fig. 9 Another block diagram of a multi-channel counter provided in an embodiment of the present application is shown.

[0045] Icons: 10-detection unit; 100-anti-coincidence detection module; 110-PIPS detection module; 111-PIPS detector; 112-preamplifier; 20-signal processing unit; 200-particle signal acquisition circuit; 210-anti-coincidence amplification circuit; 220-logic unit; 30-communication module; 40-travel switch; 50-indicator light module; 60-first power supply module; 70-second power supply module; 700-anti-coincidence high-voltage circuit; 710-PIPS preamplifier power supply circuit. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0048] First, an embodiment of the present application provides a detection device, which includes a multi-channel counter provided in an embodiment of the present application.

[0049] Optionally, to facilitate detection, the detection equipment may further include multiple sampling devices, each sampling device corresponding to a detection channel. The user may place the sample to be tested in the sampling device, and manually push the sampling device into the detection channel to push the sample to be tested into the test position.

[0050] Optionally, the sample injection device may include a sample tray, and the sample to be tested may be placed on the sample tray.

[0051] In this embodiment, the PIPS detection module in the multi-channel counter can be arranged just above the test position.

[0052] Figure 1 A block diagram of a multi-channel counter provided in an embodiment of the present application is shown in FIG. Figure 1 The multi-channel counter includes a detection unit 10 and a signal processing unit 20, wherein the detection unit 10 may include an anti-coincidence detection module 100 and multiple PIPS detection modules 110, and the anti-coincidence detection module 100 and each PIPS detection module 110 are electrically connected to the signal processing unit 20.

[0053] Optionally, each PIPS detection module 110 may be disposed in a detection channel to detect a sample to be tested, that is, a plurality of PIPS detection modules may realize detection of a plurality of samples to be tested.

[0054] In a possible implementation, the multi-channel counter may be a four-channel counter, that is, it may include four PIPS detection modules to simultaneously detect four samples to be tested.

[0055] In this embodiment, the anti-coincidence detection module 100 can be used to detect cosmic rays and environmental background signals to obtain anti-coincidence signals, and the PIPS detection module 110 can be used to detect radioactive particles in the sample to be tested to obtain particle signals.

[0056] Optionally, the PIPS detection module can be used to measure the activity of radioactive particles in the sample to be tested. In this embodiment, the radioactive particles can include α particles and β particles.

[0057] Optionally, in order to increase the anti-interference capability and output driving capability of the signal and to reduce electromagnetic interference, multiple PIPS detection modules may be packaged in a metal shielding box.

[0058] Optionally, the anti-coincidence detection module may include multiple anti-coincidence plastic scintillators, which are respectively arranged around each PIPS detection module, for example, at the upper and lower ends of each PIPS detection module. In addition, in order to perform multi-angle anti-coincidence processing, it can also be arranged around each PIPS detection module. The specific setting can be determined according to the actual application situation.

[0059] In one example, Figure 2 For an example diagram of the anti-coincidence detection module, see Figure 2 There can be four PIPS detection modules and two anti-coincidence plastic scintillators, which are respectively arranged at the upper end and the lower end of each PIPS detection module.

[0060] In this embodiment, based on the structural setting characteristics of the anti-coincidence plastic scintillator, it can only respond to gamma rays, so it can anti-coincidence to eliminate the measurement effect of gamma rays in the environment on alpha particles and beta particles, thereby improving the detection accuracy of radioactive particles.

[0061] In this embodiment, the signal processing unit 20 can be used to collect particle signals obtained by each PIPS detection module and anti-coincidence signals obtained by the anti-coincidence detection module, process each particle signal and anti-coincidence signal, and obtain a statistical spectrum corresponding to each sample to be tested.

[0062] Optionally, the statistical spectrum may record energy information and count information of the radioactive particles in the corresponding sample to be tested.

[0063] The multi-channel counter provided in the embodiment of the present application uses a PIPS (Passive Implanted Planar Silicon) detection module to detect the radioactive particles of the sample to be tested, thereby obtaining a particle signal. Since PIPS is a junction detector, its contact surface is formed by ion implantation, and an accurate, thin and sudden junction can be obtained, thereby improving the resolution of the radioactive particles. In addition, cosmic rays and environmental background signals can be detected by an anti-coincidence detection module, and the signal processing unit can combine the particle signal and the anti-coincidence signal for processing to obtain a statistical map of the sample to be tested, so that the influence of cosmic rays and environmental background signals on the measurement of radioactive particles can be eliminated by anti-coincidence, thereby improving the accuracy of the measurement of radioactive particles. And since the multi-channel counter includes multiple PIPS detection modules, each PIPS detection module is used to detect a sample to be tested, so multiple samples to be tested can be detected at the same time, thereby improving the detection efficiency.

[0064] Next, a possible implementation manner is provided for the signal processing unit 20 .

[0065] Specifically, in Figure 1 On the basis of Figure 3 For another block diagram of a multi-channel counter provided in an embodiment of the present application, see Figure 3 The signal processing unit 20 may include a particle signal acquisition circuit 200, an anti-coincidence amplification circuit 210 and a logic unit 220, and the particle signal acquisition circuit 200 is electrically connected to multiple PIPS detection modules 110, the anti-coincidence amplification circuit 210 is electrically connected to the anti-coincidence detection module 100, and the particle signal acquisition circuit 200 and the anti-coincidence amplification circuit 210 are both electrically connected to the logic unit 220.

[0066] In this embodiment, the particle signal acquisition circuit can be used to collect the particle signals obtained by each PIPS detection module, convert the particle signals into digital signals, and send the converted particle signals to the logic unit. The anti-coincidence amplification circuit can be used to collect the anti-coincidence signals obtained by the anti-coincidence detection module, amplify and convert the anti-coincidence signals, and send the processed anti-coincidence signals to the logic unit.

[0067] Optionally, the particle signal acquisition circuit may include multiple independent analog-to-digital converters, each of which may be used to acquire a particle signal obtained by a PIPS detection module one by one, and convert the particle signal into a digital signal for processing by a logic unit.

[0068] Optionally, the anti-coincidence amplifier circuit may include a trigger, which can amplify the anti-coincidence signal and convert the amplified anti-coincidence signal into a digital signal of a standard level, such as a TTL signal, through the trigger so that the logic unit can process it.

[0069] In this embodiment, the logic unit may be used to process each particle signal according to the reception time of each particle signal and the anti-coincidence signal.

[0070] Optionally, the logic unit may be a FPGA (Field Programmable Gate Array).

[0071] It can be understood that if the logic unit obtains a particle signal and an anti-coincidence signal at the same time, it means that the particle signal may be affected by cosmic rays and / or environmental background signals, so there may be inaccurate measurement of radioactive particles. In order to ensure the accuracy of the measurement, the particle signal can be discarded.

[0072] Based on this, the logic unit can also be used to delete the particle signal when the receiving time of the particle signal and the anti-coincidence signal is the same, and to extract the amplitude of the particle signal when the receiving time of the particle signal and the anti-coincidence signal is not the same, and generate a statistical spectrum corresponding to the particle signal according to the amplitude of the particle signal.

[0073] It can be understood that if the logic unit obtains the anti-coincidence signal and the particle signal at the same time, the particle signal can be deleted and not analyzed. At this time, the statistical spectrum corresponding to the sample to be tested will not be generated. If the logic unit obtains the particle signal but does not obtain the anti-coincidence signal, the particle signal can be directly processed to obtain the statistical spectrum corresponding to the sample to be tested.

[0074] Further, in Figure 3 On the basis of Figure 4For another block diagram of a multi-channel counter provided in an embodiment of the present application, see Figure 4 The PIPS detection module 110 may include a PIPS detector 111 and a preamplifier 112, the PIPS detector and the preamplifier are electrically connected, and the preamplifier is electrically connected to a particle signal acquisition circuit.

[0075] In this embodiment, the PIPS detector can be used to detect radioactive particles on the sample to be tested to obtain an initial particle signal, and the preamplifier can be used to amplify the initial particle signal to obtain a particle signal.

[0076] Optionally, the preamplifier may amplify the initial particle signal so that its measured energy satisfies a certain range, such as 0 to 10 MeV.

[0077] In this embodiment, the particle signal can be transmitted to the particle signal acquisition circuit via a coaxial cable.

[0078] Optionally, in order to facilitate users to issue detection tasks and view detection results, the multi-channel counter can also be connected to a host computer device for communication.

[0079] Based on this, Figure 1 On the basis of Figure 5 For another block diagram of a multi-channel counter provided in an embodiment of the present application, see Figure 5 The multi-channel counter may further include a communication module 30, and the communication module 30 may be connected to the signal processing unit 20 and the host computer device respectively.

[0080] In this embodiment, the communication module 30 can be used to obtain the statistical spectrum sent by the signal processing unit, and send the statistical spectrum to the host computer device.

[0081] Optionally, the host computer device may be provided with processing software, and the host computer device may perform data processing and analysis on the multiple statistical graphs obtained through the processing software, and finally calculate the total count and activity of α particles and β particles in the sample to be tested in combination with the information of the sample to be tested.

[0082] Optionally, the host computer device may also be configured with a detection task, and the logic unit in the signal processing unit may control the particle signal acquisition circuit to acquire particle signals and control the anti-coincidence amplification circuit to acquire anti-coincidence signals when there is a relevant detection task.

[0083] In addition, the signal processing unit can also obtain other information of the detection unit and upload it to the host computer device for analysis and processing, so that the host computer device can know the specific operation status of the detection unit.

[0084] Optionally, in Figure 1 On the basis of Figure 6 For another block diagram of a multi-channel counter provided in an embodiment of the present application, see Figure 6 The multi-channel counter further includes a plurality of travel switches 40, each of which corresponds to a PIPS detection module one by one, and the plurality of travel switches are electrically connected to the signal processing unit.

[0085] Optionally, each travel switch may be arranged in a detection channel of a corresponding PIPS detection module.

[0086] In this embodiment, the signal processing unit is used to determine whether to collect particle signals from the PIPS detection module corresponding to each travel switch according to the closing state of the travel switch.

[0087] Optionally, the user can place the sample to be tested on the sampling device and push the sampling device into the corresponding detection channel. When the sampling device is in place, the travel switch can be closed, indicating that the sample to be tested has reached the detection position. At this time, the PIPS detection module can measure the radioactive particles in the sample to be tested.

[0088] It can be understood that the PIPS detection module can perform real-time detection. When the sample to be tested is in place, the PIPS detection module can detect a valid particle signal. At this time, the signal processing unit can collect the particle signal from the PIPS detection module.

[0089] In one possible implementation, when a detection task exists, the logic unit can optionally determine whether the sample to be tested is in place based on whether each travel switch is closed. If the sample to be tested is in place, the particle signal acquisition circuit can be controlled to collect the particle signal obtained by the PIPS detection module.

[0090] In this embodiment, the anti-coincidence detection module can continuously acquire the anti-coincidence signal, and the logic unit can control the anti-coincidence amplification circuit to collect the anti-coincidence signal in real time when the detection task exists.

[0091] Optionally, the signal processing unit can also send the closing status of each travel switch to the host computer device, and the host computer device can determine whether the corresponding PIPS detection module currently has an application problem based on whether each travel switch is closed, such as the failure of the sample to be tested to be in place resulting in the inability to carry out detection normally.

[0092] In one possible implementation, Figure 1 On the basis of Figure 7 For another block diagram of a multi-channel counter provided in an embodiment of the present application, see Figure 7 The multi-channel counter further includes a plurality of indicator light modules 50, the indicator light modules 50 are electrically connected to the signal processing unit, and each indicator light module 50 corresponds to a PIPS detection module one by one.

[0093] It can be understood that each indicator light module can be used to indicate the operating status of a PIPS detection module.

[0094] In a possible implementation, each indicator light module may be composed of a three-color LED light, for example, a red LED light, a yellow LED light, and a green LED light.

[0095] In this embodiment, the indicator light module can be used to receive a control signal from a signal processing unit and send an indication signal according to the control signal.

[0096] The indication signal is used to indicate the operation status of the PIPS detection module corresponding to the indicator light module.

[0097] Optionally, the signal processing unit may receive an instruction from a host computer device to send a control signal to a corresponding indicator light module.

[0098] Optionally, the indication signal may include a corresponding LED lamp emitting corresponding light.

[0099] For example, if a PIPS detection module has a detection failure at this time, the red LED light corresponding to the PIPS detection module can be lit; if a PIPS detection module has an operational error or other problems at this time, such as the injection device is not in place, the yellow LED light corresponding to the PIPS detection module can be lit; if the detection situation of a PIPS detection module is normal at this time, the green LED light corresponding to the PIPS detection module can be lit.

[0100] In this embodiment, the signal processing unit can also obtain application parameters of each PIPS detection module and upload them to the host computer device, for example, obtain the voltage of each PIPS detection module, and the host computer device can determine whether it has problems such as failure.

[0101] In one possible implementation, a low-background lead chamber may be used to wrap the detection unit 10, the signal processing unit 20, a plurality of travel switches 40, and a plurality of indicator light modules 50 to physically shield background radiation in the environment.

[0102] Optionally, in Figure 1 On the basis of Figure 8 For another block diagram of a multi-channel counter provided in an embodiment of the present application, see Figure 8In order to facilitate the normal application of the anti-coincidence detection module, the PIPS detection module and the signal processing unit, the multi-channel counter also includes a first power supply module 60 and a second power supply module 70. The first power supply module 60 is electrically connected to the signal processing unit 20 and the second power supply module 70 respectively, and the second power supply module 70 is electrically connected to the anti-coincidence detection module 100 and each PIPS detection module 110 respectively.

[0103] In this embodiment, the first power supply module may be used to supply power to the signal processing unit and the second power supply module, and the second power supply module may be used to supply power to the anti-coincidence detection module and the PIPS detection module.

[0104] Optionally, the first power supply module may be a linear power supply.

[0105] Optionally, the linear power supply can supply power to the second power supply module and the signal processing unit after being processed by filtering or the like.

[0106] Optionally, in Figure 8 On the basis of Fig. 9 For another block diagram of a multi-channel counter provided in an embodiment of the present application, see Fig. 9 The second power supply module 70 may further include an anti-coincidence high voltage circuit 700 and a PIPS preamplifier power supply circuit 710 , wherein the anti-coincidence high voltage circuit 700 is electrically connected to the anti-coincidence detection module 100 , and the PIPS preamplifier power supply circuit 710 is electrically connected to each PIPS detection module 110 .

[0107] In this embodiment, the anti-coincidence high-voltage circuit can be used to provide high voltage for the anti-coincidence detection module, and the PIPS preamplifier power supply circuit can be used to supply power to each PIPS detection module.

[0108] In one possible implementation, the anti-coincidence high voltage circuit can provide high voltage for the photomultiplier tube in the anti-coincidence detection module, and the PIPS preamplifier power supply circuit can power the preamplifier in the PIPS detection module and provide PIPS bias power for the PIPS detector.

[0109] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-channel counter, characterized in that: It comprises a detection unit and a signal processing unit, wherein the detection unit comprises an anti-coincidence detection module and a plurality of PIPS detection modules, and the anti-coincidence detection module and each of the PIPS detection modules are electrically connected to the signal processing unit, and each of the PIPS detection modules is used to detect a sample to be tested; The anti-coincidence detection module is used to detect cosmic rays and environmental background signals to obtain anti-coincidence signals; The PIPS detection module is used to detect radioactive particles in the sample to be tested and obtain particle signals; The signal processing unit is used to collect the particle signals obtained by each of the PIPS detection modules and the anti-coincidence signals obtained by the anti-coincidence detection module, process each of the particle signals and the anti-coincidence signals, and obtain the statistical spectra corresponding to each of the samples to be tested.

2. The multi-channel counter according to claim 1, characterized in that: The signal processing unit includes a particle signal acquisition circuit, an anti-coincidence amplification circuit and a logic unit; The particle signal acquisition circuit is electrically connected to the plurality of PIPS detection modules, the anti-coincidence amplification circuit is electrically connected to the anti-coincidence detection module, and both the particle signal acquisition circuit and the anti-coincidence amplification circuit are electrically connected to the logic unit; The particle signal acquisition circuit is used to collect the particle signals acquired by each of the PIPS detection modules, convert the particle signals into digital signals, and send the converted particle signals to the logic unit; The anti-coincidence amplifying circuit is used to collect the anti-coincidence signal obtained by the anti-coincidence detection module, amplify and convert the anti-coincidence signal, and send the processed anti-coincidence signal to the logic unit; The logic unit is used to process each of the particle signals according to the reception time of each of the particle signals and the anti-coincidence signal.

3. The multi-channel counter according to claim 2, characterized in that: The logic unit is also used to delete the particle signal when the reception time of the particle signal and the anti-coincidence signal is the same time, and to extract the amplitude of the particle signal when the reception time of the particle signal and the anti-coincidence signal is not the same time, and to generate a statistical spectrum corresponding to the particle signal according to the amplitude of the particle signal.

4. The multi-channel counter according to claim 2, characterized in that: The PIPS detection module comprises a PIPS detector and a preamplifier, the PIPS detector and the preamplifier are electrically connected, and the preamplifier is electrically connected to the particle signal acquisition circuit; The PIPS detector is used to detect radioactive particles on the sample to be tested and obtain an initial particle signal; The preamplifier is used to amplify the initial particle signal to obtain the particle signal.

5. The multi-channel counter according to claim 1, characterized in that: The multi-channel counter also includes a communication module, and the communication module is connected to the signal processing unit and the host computer device respectively; The communication module is used to obtain the statistical spectrum sent by the signal processing unit and send the statistical spectrum to the host computer device.

6. The multi-channel counter according to claim 1, characterized in that: The multi-channel counter further includes a first power supply module and a second power supply module, wherein the first power supply module is electrically connected to the signal processing unit and the second power supply module respectively, and the second power supply module is electrically connected to the anti-coincidence detection module and each of the PIPS detection modules respectively; The first power supply module is used to supply power to the signal processing unit and the second power supply module; The second power supply module is used to supply power to the anti-coincidence detection module and the PIPS detection module.

7. The multi-channel counter according to claim 6, characterized in that: The second power supply module includes an anti-coincidence high-voltage circuit and a PIPS preamplifier power supply circuit, the anti-coincidence high-voltage circuit is electrically connected to the anti-coincidence detection module, and the PIPS preamplifier power supply circuit is electrically connected to each of the PIPS detection modules; The anti-coincidence high-voltage circuit is used to provide high voltage for the anti-coincidence detection module; The PIPS preamplifier power supply circuit is used to supply power to each of the PIPS detection modules.

8. The multi-channel counter according to claim 1, characterized in that: The multi-channel counter further includes a plurality of indicator light modules, each of which is electrically connected to the signal processing unit, and each of which corresponds to the PIPS detection module one by one; The indicator light module is used to receive the control signal of the signal processing unit and send out an indication signal according to the control signal; the indication signal is used to represent the operating status of the PIPS detection module corresponding to the indicator light module.

9. The multi-channel counter according to claim 1, characterized in that: The multi-channel counter further includes a plurality of travel switches, each of which corresponds to the PIPS detection module one by one, and the plurality of travel switches are electrically connected to the signal processing unit; The signal processing unit is used to determine whether to collect the particle signal from the PIPS detection module corresponding to the travel switch according to the closed state of each travel switch.

10. A detection device, characterized in that: A multi-channel counter comprising any one of claims 1 to 9.

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