A cartridge monitoring device for a pneumatic sample delivery system

Abstract

The present application relates to a kind of gas dynamic sample delivery system pipeline's magazine monitoring device, to monitor whether there is magazine through in measured pipeline, comprising: excitation source generation circuit: to generate excitation signal;Magazine monitoring sensor: receive the excitation signal of excitation source generation circuit, generate electromagnetic induction, output induction signal, the magazine monitoring sensor is set on the outer wall of the measured pipeline;Signal processing and output circuit: receive the induction signal sent by magazine monitoring sensor, and after the induction signal is handled, output to reflect the high level that there is no magazine through in the measured pipeline and to reflect the low level that there is magazine through in the measured pipeline.It can be accurately monitored whether there is magazine through in measured pipeline compared with prior art.

Description

Technical Field

[0001] This invention relates to the field of nuclear material production technology, and in particular to a clip monitoring device for a pneumatic sample delivery system pipeline. Background Technology

[0002] Monitoring of clips containing radioactive materials in pneumatic sample delivery systems has always been difficult.

[0003] In existing technologies, photoelectric switches are used to monitor the clips in pneumatic sample delivery systems. However, due to impurities generated during pipeline use and the excessively high speed at which the clips pass through the pipeline, the photoelectric switches cannot detect the signal of the clips passing through the pipeline. This makes it impossible to determine whether the clips are stuck or damaged, preventing the pneumatic sample delivery system from achieving automatic sample delivery. Furthermore, stuck or damaged clips in the pipeline pose a risk of radioactive material leakage. Therefore, accurate monitoring of the clips in the pipeline is crucial to reducing the radiation dose to maintenance personnel. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects of the prior art and provide a clip monitoring device for a pneumatic sample delivery system pipeline. This invention can accurately monitor whether a clip is passing through the pipeline being tested.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] This invention provides a clip monitoring device for a pneumatic sample delivery system pipeline, characterized in that it is used to monitor whether a clip is passing through the pipeline being tested, comprising:

[0007] Excitation source generation circuit: used to generate excitation signals;

[0008] Magazine monitoring sensor: Receives the excitation signal from the excitation source generating circuit, generates electromagnetic induction, and outputs an induction signal. The magazine monitoring sensor is sleeved on the outer wall of the pipe being measured.

[0009] Signal processing and output circuit: Receives the sensing signal emitted by the magazine monitoring sensor, processes the sensing signal, and outputs a first level reflecting that no magazine has passed through the tested pipe and a second level reflecting that a magazine has passed through the tested pipe.

[0010] Preferably, the magazine monitoring sensor includes a sensor body, an excitation coil disposed within the sensor body, and a first-stage coil and a second-stage coil disposed on both sides of the excitation coil. The excitation coil is used to receive an excitation signal, and the two ends of the first-stage coil and the two ends of the second-stage coil respectively output a first induced voltage signal U2 and a second induced voltage signal U3.

[0011] Preferably, a simulated pipe extends from one end of the sensor body to the other, the pipe under test is arranged parallel to the simulated pipe, and the first-stage coil is arranged close to the simulated pipe, while the second-stage coil is arranged close to the pipe under test.

[0012] Preferably, the signal processing and output circuit includes a zeroing and amplification circuit, a rectifier circuit, and a comparison signal output circuit connected in sequence;

[0013] The first induced voltage signal U2 and the second induced voltage signal U3 are both zeroed and amplified sequentially through a zeroing and amplification circuit, processed into DC signals by a rectifier circuit, and finally output by a comparison signal output circuit to reflect a first level indicating that no clip has passed through the tested pipe and a second level indicating that a clip has passed through the tested pipe.

[0014] Preferably, when no clip passes through the pipe being tested, the voltage at the negative terminal of the comparator in the comparison signal output circuit is lower than the reference voltage at the positive terminal, and the first level is output.

[0015] When a magazine passes through the pipe being tested, the voltage at the negative terminal of the comparator in the comparison signal output circuit is higher than the reference voltage at the positive terminal, and the second level is output.

[0016] Preferably, the first-stage coil and the second-stage coil are connected in series in reverse order.

[0017] Preferably, one end of the first stage coil is connected to a first resistor and a first capacitor in sequence, and the other end is connected to one end of the second stage coil. The other end of the second stage coil is connected to the first capacitor in sequence through a second resistor and a second capacitor.

[0018] Preferably, one end of the excitation coil is connected to an excitation resistor and an excitation capacitor in sequence, and the excitation capacitor is connected to the other end of the excitation coil to form a circuit.

[0019] Preferably, the first-stage coil and the second-stage coil have exactly the same shape and structure.

[0020] Preferably, the excitation source generating circuit includes a crystal oscillator frequency divider circuit, a shaping circuit, an amplification circuit, and an independent power amplifier circuit connected in sequence;

[0021] The square wave signal is generated by the crystal oscillator frequency divider circuit, processed into a sine wave signal by the shaping circuit, amplified by the amplifier circuit, and then amplified by the independent power amplifier circuit to generate the excitation signal.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This invention provides a clip monitoring device for a pneumatic sample delivery system pipeline. By setting a clip monitoring sensor outside the pipeline under test without affecting the sealing of the pipeline, the device monitors the clips inside the pipeline under test. By setting a simulated pipeline for comparison with the pipeline under test, the primary coil near the simulated pipeline and the secondary coil near the pipeline under test generate corresponding induced voltage signals. By comparing the high and low levels output by the signal output circuit, the device can accurately monitor whether a clip has passed through the pipeline under test. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the circuit structure of a clip monitoring device for a pneumatic sample delivery system pipeline provided in this embodiment.

[0025] Figure 2 for Figure 1 The circuit structure diagram of the magazine monitoring sensor in the embodiment shown is shown.

[0026] Figure 3 This is a schematic diagram of the structure of a clip monitoring device for a pneumatic sample delivery system pipeline provided in this embodiment.

[0027] The following are labeled in the diagram: 1. Simulated pipe, 2. Pipe under test, 3. Cable assembly, 4. Sensor body, 5. Excitation coil, 51. Excitation resistor, 52. Excitation capacitor, 61. First stage coil, 62. Second stage coil, 71. First resistor, 72. Second resistor, 81. First capacitor, 82. Second capacitor. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0029] refer to Figure 1 As shown, the present invention provides a clip monitoring device for a pneumatic sample delivery system pipeline, used to monitor whether the delivery clip passes through the tested pipeline 2, comprising:

[0030] Excitation source generation circuit: used to generate excitation signals;

[0031] Magazine monitoring sensor: Receives the excitation signal from the excitation source generating circuit, generates electromagnetic induction, and outputs an induction signal. The magazine monitoring sensor is sleeved on the outer wall of the pipe being measured 2.

[0032] Signal processing and output circuit: Receives the sensing signal emitted by the magazine monitoring sensor, processes the sensing signal, and outputs a first level reflecting that no magazine has passed through the tested pipe 2 and a second level reflecting that a magazine has passed through the tested pipe 2, wherein the first level is a high level and the second level is a low level.

[0033] Preferably, multiple magazine monitoring sensors can be set. The average delivery speed of the magazine is calculated by using the time difference, and the wear condition of the magazine can be assessed by comparing long-term data, which facilitates magazine replacement management.

[0034] As an optional implementation, the excitation source generation circuit includes a crystal oscillator frequency divider circuit, a shaping circuit, an amplification circuit, and an independent power amplifier circuit connected in sequence.

[0035] A square wave signal is generated by a crystal oscillator frequency divider circuit, which is then processed into a sine wave signal by a shaping circuit, amplified by an amplifier circuit, and finally amplified by an independent power amplifier circuit to generate an excitation signal.

[0036] As an optional implementation, the magazine monitoring sensor includes a sensor body 4, an excitation coil 5 disposed within the sensor body 4, and a first-stage coil 61 and a second-stage coil 62 disposed on both sides of the excitation coil 5. The excitation coil 5 is used to receive excitation signals, and the first-stage coil 61 and the second-stage coil 62 respectively output a first induced voltage signal U2 and a second induced voltage signal U3.

[0037] As an optional implementation, the primary coil 61 and the secondary coil 62 are connected in series in reverse order.

[0038] Specifically, one end of the first stage coil 61 is connected to a first resistor 71 and a first capacitor 81 in sequence, and the other end is connected to one end of the second stage coil 62. The other end of the second stage coil 62 is connected to the first capacitor 81 in sequence through a second resistor 72 and a second capacitor 82.

[0039] As an optional implementation, one end of the excitation coil 5 is connected in sequence to an excitation resistor 51 and an excitation capacitor 52, and the excitation capacitor 52 is connected to the other end of the excitation coil 5 to form a circuit.

[0040] As an optional implementation, a simulated pipe 1 extends from one end of the sensor body 4 to the other. The pipe under test 2 is arranged parallel to the simulated pipe 1, with the first-stage coil 61 positioned close to the simulated pipe 1 and the second-stage coil 62 positioned close to the pipe under test 2. There is no delivery clip inside the simulated pipe 1.

[0041] As an optional implementation, the first-stage coil 61 and the second-stage coil 62 have completely identical shapes and structures.

[0042] According to Kirchhoff's voltage law, the excitation voltage, the voltage of the first-stage coil, and the induced voltage of the second-stage coil can be obtained. The expressions for each voltage are as follows:

[0043] U1=jωL1I1+R1I1-jωM 21 I2-jωM 31 I3

[0044] In the formula, U1 is the excitation voltage, L1 is the inductance of the excitation coil, I1 is the current flowing through the excitation coil, I2 is the current flowing through the first stage coil, I3 is the current flowing through the second stage coil, R1 is the effective resistance of the excitation coil, and M... 21 M is the mutual inductance between the primary coil and the excitation coil. 31 ω is the mutual inductance between the excitation coil and the secondary coil, ω is the resonant angular frequency, and j is the imaginary unit.

[0045] U2=jωL2I2+R2I2-jωM 12 I1-jωM 32 I3

[0046] In the formula, U2 is the first induced voltage signal, L2 is the inductance of the first primary coil, R2 is the resistance of the first resistor, and M... 12 M is the mutual inductance between the excitation coil and the primary coil. 32 This represents the mutual inductance between the second-stage coil and the first-stage coil.

[0047] U3=jωL3I3+R3I3-jωM 13 I1-jωM 21 I2

[0048] In the formula, U3 is the second induced voltage signal, L3 is the inductance of the second stage coil, R3 is the resistance of the second resistor, and M... 13 This is the mutual inductance value between the excitation coil and the secondary coil.

[0049] Since the first secondary coil 61 and the second secondary coil 62 have the same shape and structure, and the distances from the two secondary coils to the excitation coil 5 are the same, the magnitudes of the first induced voltage signal U2 and the second induced voltage signal U3 are the same, and they will be completely canceled out after passing through the differential amplifier.

[0050] Therefore, when there is a magazine inside the tested pipe 2 or when a magazine passes through quickly, the distances from the first-stage coil 61 and the second-stage coil 62 to the magazine are different. The induced voltage on the first-stage coil 61 changes little, while the induced voltage on the second-stage coil 62 changes much. The differential signal between the first induced voltage signal U2 and the second induced voltage signal U3 can reflect the changes in the tested pipe and can detect the presence or absence of a magazine inside the tested pipe 2.

[0051] As an optional implementation, the signal processing and output circuit includes a zeroing and amplification circuit, a rectifier circuit, and a comparison signal output circuit connected in sequence.

[0052] Specifically, the zeroing and amplification circuit is used to perform zeroing and amplification operations on the induced signal in sequence.

[0053] Since there is a background difference between the induced signals generated by the primary coil 61 and the secondary coil 62, zeroing the induced signals generated by the two secondary coils can eliminate the background difference between the two induced signals. That is, when no magazine passes through the monitoring device, the difference between the two induced signals is as close to 0 as possible.

[0054] Since the induced signal quantity (mV level) is small and is an AC signal, while the output signal is V level and is a DC signal, it is necessary to amplify and rectify the induced signal after zeroing.

[0055] Finally, the signal output circuit outputs different high and low levels by comparing the signals.

[0056] When no magazine passes through the pipe, the voltage at the negative terminal of the comparator in the comparison signal output circuit is lower than the reference voltage at the positive terminal, so the output is high.

[0057] When a magazine passes through the pipe, the voltage at the negative terminal of the comparator in the comparison signal output circuit is higher than the reference voltage at the positive terminal, so the output is low.

[0058] As an optional implementation, the sensor body 4 is connected to a pneumatic sample delivery control module via a cable assembly 3.

[0059] The installation process and working principle of the clip monitoring device for a pneumatic sample delivery system pipeline provided in this embodiment are as follows:

[0060] Remove the lower clamps on both sides of the sensor body 4, install the simulated pipe 1 on the sensor body 4, then install the corresponding lower clamps, and then install the sensor body 4 with the simulated pipe 1 on the pipe to be measured 2, install the corresponding lower clamps, adjust the sensor direction and position, and tighten the lower clamp bolts. Connect the cable assembly 3 and the sensor cable connector. After the cable connection is completed, install the sensor cover on the outside of the sensor. When installing, make sure to clean the sensor body before installation and ensure that there are no impurities inside the cover.

[0061] A square wave signal is generated by a crystal oscillator frequency divider circuit, processed into a sine wave signal by a shaping circuit, amplified by an amplifier circuit, and then amplified by an independent power amplifier circuit to generate an excitation signal. The excitation coil 5 receives the excitation signal and resonates with the first stage coil 61 and the second stage coil 62. The first stage coil 61 and the second stage coil 62 generate the first induced voltage signal U2 and the second induced voltage signal U3, respectively, and input them to the zeroing and amplification circuit. The zeroing and amplification circuit performs zeroing and amplification operations on the induced signals in sequence. Finally, different high and low levels are output through the comparison signal output circuit.

[0062] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A clip monitoring device for a pneumatic sample delivery system pipeline, characterized in that, Used to monitor whether a magazine passes through the tested pipe (2), including: Excitation source generation circuit: used to generate excitation signals; Magazine monitoring sensor: Receives the excitation signal from the excitation source generating circuit, generates electromagnetic induction, and outputs an induction signal. The magazine monitoring sensor is sleeved on the outer wall of the pipe (2) being measured. Signal processing and output circuit: Receives the sensing signal emitted by the magazine monitoring sensor, processes the sensing signal, and outputs a first level reflecting that no magazine passes through the tested pipe (2) and a second level reflecting that a magazine passes through the tested pipe (2); The magazine monitoring sensor includes a sensor body (4), an excitation coil (5) disposed within the sensor body (4), and a first-stage coil (61) and a second-stage coil (62) respectively disposed on both sides of the excitation coil (5). The excitation coil (5) is used to receive excitation signals, and the two ends of the first-stage coil (61) and the two ends of the second-stage coil (62) respectively output first induced voltage signals. U 2 and second induced voltage signal U 3; A simulated pipe (1) runs through one end of the sensor body (4) to the other end. The pipe to be tested (2) is arranged parallel to the simulated pipe (1). The first-stage coil (61) is arranged close to the simulated pipe (1), and the second-stage coil (62) is arranged close to the pipe to be tested (2). The signal processing and output circuit includes a zeroing and amplification circuit, a rectifier circuit, and a comparison signal output circuit connected in sequence. The first induced voltage signal U 2 and second induced voltage signal U All 3 are zeroed and amplified sequentially through the zeroing and amplification circuits, processed into DC signals by the rectifier circuit, and finally output by the comparison signal output circuit to reflect the first level that no clip passes through the tested pipe (2) and the second level that reflects the clip passing through the tested pipe (2).

2. The clip monitoring device for a pneumatic sample delivery system pipeline according to claim 1, characterized in that, When no clip passes through the pipe (2) being tested, the voltage at the negative terminal of the comparator in the comparison signal output circuit is lower than the reference voltage at the positive terminal, and the first level is output. When a magazine passes through the pipe (2) being tested, the voltage at the negative terminal of the comparator in the comparison signal output circuit is higher than the reference voltage at the positive terminal, and the second level is output.

3. The clip monitoring device for a pneumatic sample delivery system pipeline according to claim 1, characterized in that, The first-stage coil (61) and the second-stage coil (62) are connected in series in reverse order.

4. The clip monitoring device for a pneumatic sample delivery system pipeline according to claim 3, characterized in that, One end of the first stage coil (61) is connected to a first resistor (71) and a first capacitor (81) in sequence, and the other end is connected to one end of the second stage coil (62). The other end of the second stage coil (62) is connected to the first capacitor (81) in sequence through a second resistor (72) and a second capacitor (82).

5. The clip monitoring device for a pneumatic sample delivery system pipeline according to claim 1, characterized in that, One end of the excitation coil (5) is connected to an excitation resistor (51) and an excitation capacitor (52) in sequence, and the excitation capacitor (52) is connected to the other end of the excitation coil (5) to form a circuit.

6. The clip monitoring device for a pneumatic sample delivery system pipeline according to claim 1, characterized in that, The first-stage coil (61) and the second-stage coil (62) have the same shape and structure.

7. The clip monitoring device for a pneumatic sample delivery system pipeline according to claim 1, characterized in that, The excitation source generating circuit includes a crystal oscillator frequency divider circuit, a shaping circuit, an amplification circuit, and an independent power amplifier circuit connected in sequence. The square wave signal is generated by the crystal oscillator frequency divider circuit, processed into a sine wave signal by the shaping circuit, amplified by the amplifier circuit, and then amplified by the independent power amplifier circuit to generate the excitation signal.

Images