A fault detection apparatus and mass spectrometer

Abstract

The application discloses a fault detection device and a mass spectrometer, relates to the technical field of fault detection, and is applied to a motor in a vacuum cavity of a mass spectrometer. Each first controllable switch is connected in series with each coil through a power supply interface of the vacuum cavity and each coil, N series circuits obtained are connected in parallel, and the parallel circuit is connected with a processing module and a power supply. The processing module controls the N first controllable switches to be turned on respectively, a first voltage between the parallel circuit is collected, and the working state of the motor is determined. Compared with the prior art, the fault detection device provided by the application can detect the working state of the motor in the closed vacuum cavity, facilitate timely discovery of faults and processing, and does not need human participation, so that the working performance of the mass spectrometer is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fault detection, in particular to a fault detection device and a mass spectrometer. BACKGROUND

[0002] With the development of in-vitro diagnosis industry, people have higher and higher quality requirements for medical devices such as mass spectrometers. The power system of the mass spectrometer includes a motor and a mechanical structure driven by the motor. The motor is in a vacuum closed environment in the mass spectrometer, includes a plurality of coils, and both ends of each coil are connected out of the vacuum cavity through a corresponding power supply port and connected with a power supply, so that each coil can be powered on, thereby ensuring that the motor drives the mechanical structure to act.

[0003] The motor is one of the key components of the driving system, and whether it can work reliably affects whether the mass spectrometer can work reliably. However, since the motor is in a vacuum closed environment in the mass spectrometer, it is impossible for a person to directly detect whether it has failed, which affects the reliability of the motor and in turn affects the stable operation of the mass spectrometer. SUMMARY

[0004] The purpose of the present application is to provide a fault detection device and a mass spectrometer, which can detect the working state of the motor in the closed vacuum cavity, facilitate timely detection and processing of faults, and do not require human intervention, thereby improving the automation degree and ensuring the working performance of the mass spectrometer.

[0005] To solve the above technical problems, the present application provides a fault detection device applied to a motor in a vacuum cavity in a mass spectrometer. The motor includes N coils, both ends of the i th coil are connected out of the vacuum cavity through the i th power supply interface, and the fault detection device includes N first controllable switches and a processing module, wherein N is an even number not less than 2, 1≤i≤N and i is an integer.

[0006] The i th first controllable switch is connected in series with the i th coil through the i th power supply interface; N series circuits are connected in parallel, and the parallel circuit is connected with the processing module and the power supply, respectively;

[0007] The processing module is also connected with the control end of each first controllable switch for controlling each first controllable switch to be turned on, respectively, and determining the working state of the motor according to the first voltage between the parallel circuit ends collected when each first controllable switch is turned on.

[0008] Preferably, the processing module includes an AD sampling module, a processor, a timer and a frequency divider.

[0009] One end of the timer is connected with the power supply, and the other end of the timer is connected with the input end of the frequency divider.

[0010] An output end of the frequency divider is connected with a control end of each of the first controllable switches, for frequency-dividing and outputting the equal-bandwidth pulse signals sent by the timer, so as to control each of the first controllable switches to be turned on respectively;

[0011] The AD sampling module is connected with the parallel circuit and the processor respectively, for collecting a first voltage between two ends of the parallel circuit when each of the first controllable switches is turned on and transmitting the first voltage to the processor;

[0012] The processor is configured to determine the working state of the motor according to the first voltage.

[0013] Preferably, the processing module further comprises a voltage amplification module.

[0014] One end of the parallel circuit is connected with a first input end of the voltage amplification module and a first end of a first input channel of the AD sampling module respectively; the other end of the parallel circuit is connected with a second input end of the voltage amplification module and a second end of the first input channel of the AD sampling module respectively.

[0015] A first output end of the voltage amplification module is connected with a first end of a second input channel of the AD sampling module, and a second output end of the voltage amplification module is connected with a second end of the second input channel of the AD sampling module, for amplifying the first voltage between two ends of the parallel circuit by a preset multiple to obtain a second voltage when each of the first controllable switches is turned on, so that the second voltage reaches a collection resolution threshold of the AD sampling module.

[0016] A first output channel of the AD sampling module corresponding to the first input channel is connected with a first input end of the processor, and a second output channel of the AD sampling module corresponding to the second input channel is connected with a second input end of the processor.

[0017] Preferably, the processor is an MCU.

[0018] Preferably, the processing module further comprises a voltage amplification module.

[0019] The prompt module is connected with the processing module, for prompting a result of the working state of the motor determined by the processing module.

[0020] Preferably, the prompt module is a display screen.

[0021] Preferably, the first controllable switch is a relay.

[0022] Preferably, the processing module further comprises a voltage amplification module.

[0023] The current stabilizing module is arranged between the power supply and the parallel circuit, and an input end of the current stabilizing module is connected with the power supply; a first output end of the current stabilizing module is connected with one end of the parallel circuit; and a second output end of the current stabilizing module is connected with the other end of the parallel circuit, so as to stabilize the voltage output by the power supply and stabilize the output current of the current stabilizing module at a preset current stabilizing value.

[0024] Preferably, the current stabilizing module is a constant current source integrated chip.

[0025] To solve the above technical problems, the application further provides a mass spectrometer, comprising a control module and a motor in a vacuum cavity, and further comprising a second controllable switch and a fault detection device as described above.

[0026] The fault detection device is connected with the motor.

[0027] The second controllable switch is arranged between the power supply and the fault detection device, and a first end of the second controllable switch is connected with the power supply; a second end of the second controllable switch is connected with the fault detection device; and a control end of the second controllable switch is connected with the control module, so as to be turned on when receiving the on signal of the control module and turned off when not receiving the on signal.

[0028] The control module is used for sending the on signal to the second controllable switch when the mass spectrometer is powered on or the mass spectrometer stops isotopic detection or waits to determine the working state of the motor.

[0029] The application provides a fault detection device and a mass spectrometer, which are applied to a motor in a vacuum cavity in a mass spectrometer, each first controllable switch is connected with each coil in series through a power supply interface connected out of the vacuum cavity, N series circuits are obtained by connecting the first controllable switches in series, and the series circuits are connected with a processing module and a power supply in parallel, without changing the wiring structure of the motor in the vacuum cavity; the processing module controls the N first controllable switches to be turned on respectively, and collects a first voltage between the parallel circuits, so as to determine the working state of the motor. Compared with the prior art, the fault detection device provided by the application can detect the working state of the motor in the closed vacuum cavity, so that the fault can be found and processed in time, and the automation degree is high without human intervention, thereby guaranteeing the working performance of the mass spectrometer. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the prior art and the embodiments will be briefly introduced as follows. Obviously, the drawings described in the following embodiments are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0031] Figure 1 A structural schematic diagram of a fault detection device provided by the present application is shown in the figure.

[0032] Figure 2 A structural schematic diagram of another fault detection device provided by the present application is shown in the figure.

[0033] Figure 3 A structural schematic diagram of a mass spectrometer provided by the present application is shown in the figure. DETAILED DESCRIPTION

[0034] The core of the present application is to provide a fault detection device and a mass spectrometer, which realizes the detection of the working state of the motor in the closed vacuum cavity, facilitates the timely discovery and processing of faults, and does not require human intervention, has high automation degree, and guarantees the working performance of the mass spectrometer.

[0035] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort fall within the protection scope of the present application.

[0036] Please refer to Figure 1 , Figure 1 A structural schematic diagram of a fault detection device provided by the present application is shown in the figure.

[0037] The fault detection device is applied to a motor in a vacuum cavity in a mass spectrometer, the motor includes N coils, both ends of the i th coil are connected out of the vacuum cavity through the i th power supply interface, the fault detection device includes N first controllable switches 1 and a processing module 2, wherein N is an even number not less than 2, 1≤i≤N and i is an integer;

[0038] The i th first controllable switch 1 is connected in series with the i th coil through the i th power supply interface; the N series circuits are connected in parallel, and the parallel circuit is connected with the processing module 2 and the power supply respectively;

[0039] The processing module 2 is also connected with the control end of each first controllable switch 1, and is used for controlling each first controllable switch 1 to be turned on respectively, and determining the working state of the motor according to the first voltage collected at the two ends of the parallel circuit when each first controllable switch 1 is turned on respectively.

[0040] In the embodiment, considering that in the prior art, it is impossible for a person to directly detect whether the motor in the vacuum cavity fails, the reliability of the motor and the stability of the mass spectrometer cannot be guaranteed. To solve the above technical problem, the application provides a fault detection device, which realizes automatic detection of the motor fault without human intervention.

[0041] The motor herein includes but is not limited to a stepper motor, the motor includes N coils, and the two ends of each coil are connected out of the vacuum cavity through a corresponding power supply interface. Thus, the i th first controllable switch 1 is connected in series with the i th coil through the i th power supply interface, wherein the first controllable switch 1 includes but is not limited to a relay. The N series circuits are connected in parallel, and the parallel circuit is connected with the processing module 2 and the power supply, specifically as shown in the figure. Figure 1 The working state of the motor specifically includes short circuit, open circuit and normal working. The processing module 2 controls each first controllable switch to be turned on respectively, and a detection loop is formed when each first controllable switch 1 is turned on. The coils of the motor have a certain resistance, so the first voltage collected at the two ends of the parallel circuit is essentially the voltage drop on the coil corresponding to the first controllable switch 1 that is currently turned on. Further, the step of determining the working state of the motor can be that when the first voltage is less than the lower threshold, it is determined that the corresponding coil is short-circuited, so the working state of the motor is determined to be short-circuit; when the first voltage is greater than the upper threshold, it is determined that the corresponding coil is open-circuited, so the working state of the motor is determined to be open-circuit; and when the lower threshold < the first voltage < the upper threshold, it is determined that the corresponding coil is normally working, so the working state of the motor is determined to be normal working.

[0042] It can be understood that since the number of the first controllable switch 1 in the application is the same as the number of the coils, the fault detection device can realize fault detection of one motor or multiple motors, as long as the connection line specified in the application is connected.

[0043] In summary, the application provides a fault detection device, which does not need to change the wiring structure of the motor in the vacuum cavity, realizes detection of the working state of the motor in the closed vacuum cavity, facilitates timely detection and processing of faults, and has high automation degree without human intervention, thereby guaranteeing the working performance of the mass spectrometer.

[0044] On the basis of the above embodiment:

[0045] Please refer to Figure 2 , Figure 2 The structure diagram of another fault detection device provided by the application is shown.

[0046] As a preferred embodiment, the processing module 2 comprises an AD sampling module 22, a processor 21, a timer 24 and a frequency divider 23.

[0047] One end of the timer 24 is connected with the power supply, and the other end of the timer 24 is connected with the input end of the frequency divider 23.

[0048] The output end of the frequency divider 23 is connected with the control end of each first controllable switch 1, for dividing the equal-bandwidth pulse signal sent by the timer 24 and outputting, so as to control each first controllable switch 1 to be turned on respectively.

[0049] The AD sampling module 22 is connected with the parallel circuit and the processor 21 respectively, for collecting the first voltage between the two ends of the parallel circuit when each first controllable switch 1 is turned on and transmitting to the processor 21.

[0050] The processor 21 is used for determining the working state of the motor according to the first voltage.

[0051] In this embodiment, considering that the control of each first controllable switch 1 should be reliable and effective, the processing module 2 can comprise the AD sampling module 22, the processor 21, the timer 24 and the frequency divider 23, and the connection mode of each part has been described above, which will not be repeated here. The control circuit for controlling each first controllable switch 1 to be turned on respectively is composed of the timer 24 and the frequency divider 23, compared with the mode controlled by the single-chip microcomputer or other software programs, this pure hardware control circuit greatly reduces the use cost and the occurrence of code running dead fault.

[0052] Specifically, the AD sampling module 22 can be an AD sampling chip, and the chip model includes but is not limited to AD7606, and the sampling rate of the AD sampling chip can be 12bit, which is higher in precision than that of the 8bit AD sampling chip. The equal-bandwidth pulse signal sent by the timer 24 can be understood as the pulse signal with predetermined interval time and duration in essence.

[0053] It can be seen that the function of the processing module 2 can be realized simply and reliably through the above setting and corresponding connection relationship.

[0054] As a preferred embodiment, the processing module 2 further comprises a voltage amplification module 25.

[0055] One end of the parallel circuit is connected with the first input end of the voltage amplification module 25 and the first end of the first input channel of the AD sampling module 22 respectively; the other end of the parallel circuit is connected with the second input end of the voltage amplification module 25 and the second end of the first input channel of the AD sampling module 22 respectively;

[0056] The first output end of the voltage amplification module 25 is connected with the first end of the second input channel of the AD sampling module 22, and the second output end of the voltage amplification module 25 is connected with the second end of the second input channel of the AD sampling module 22, for amplifying the first voltage between the two ends of the parallel circuit by a preset multiple when each first controllable switch 1 is turned on to obtain a second voltage, so that the second voltage reaches the acquisition resolution threshold of the AD sampling module 22;

[0057] The first output channel of the AD sampling module 22 corresponding to the first input channel is connected with the first input end of the processor 21, and the second output channel of the AD sampling module 22 corresponding to the second input channel is connected with the second input end of the processor 21.

[0058] In the embodiment, further considering that the AD sampling module 22 has a sampling resolution threshold, when the corresponding coil is short-circuited, the first voltage collected is too small to be collected by the AD sampling module 22, therefore, the processing module 2 can further include a voltage amplification module 25, and the specific connection mode of the voltage amplification module 25 in the circuit is as described above, which will not be repeated here. Specifically, the voltage amplification module 25 amplifies the first voltage between the two ends of the parallel circuit by a preset multiple when each first controllable switch 1 is turned on to obtain a second voltage, and the preset multiple can be set according to actual requirements, and the voltage amplification module 25 can be specifically an amplification circuit composed of an operational amplifier, which is not particularly limited here. Further, when the coil is short-circuited, the voltage drop between the two ends of the coil is about 0.5V, so, taking the collected first voltage as 0.5V for example, the preset multiple can be 4 times, that is, the first voltage is amplified to 2V by the voltage amplification module 25, so that the AD sampling module 22 can be guaranteed to collect.

[0059] Therefore, for the AD sampling module 22, when each first controllable switch 1 is turned on, the first voltage can be collected through the first input channel of the AD sampling module 22 and the collection result of the first voltage is transmitted to the processor 21 through the first output channel, and the second voltage can be collected through the second input channel of the AD sampling module 22 and the collection result of the second voltage is transmitted to the processor 21 through the second output channel. For the processor 21, the working state of the motor can be determined according to the first voltage and the second voltage, that is, the processor 21 knows that the information received by the first input end is normal and unamplified information, and the information received by the second input end is amplified information. When the first voltage is too small, the first input end is likely to receive no information (because the AD sampling module 22 is likely to fail to collect due to not reaching its collection resolution threshold) and only the second input end obtains information, so it can be determined that the motor has a short circuit fault. When the first input end can receive the first voltage, the working state of the motor can be determined according to the first voltage, for example, when the first voltage is greater than 5V, it is determined that the motor is in an open circuit state, and when the first voltage is between 0.5V and 5V, it is determined that the motor is in a normal working state.

[0060] It can be seen that through the above-mentioned voltage amplification module 25 and the connection mode of the AD sampling module 22 and the parallel circuit, the reliable working of the processing module 2 in the application can be reliably ensured.

[0061] As a preferred embodiment, the processor 21 is an MCU.

[0062] In this embodiment, the processor 21 can be an MCU (Microcontroller Unit). The MCU has the advantages of small size, high integration, fast running speed and programmability, and can reliably realize the control logic of the processor 21 in the application. The model of the MCU includes but is not limited to STM32F407.

[0063] Of course, as an extension, the processor 21 can also be other control chips, including but not limited to DSP chips and the like.

[0064] As a preferred embodiment, the application further comprises a prompt module.

[0065] The prompt module is connected with the processing module 2 and is used for prompting the working state of the motor determined by the processing module 2.

[0066] In this embodiment, in order to more intuitively show the working state of the motor, and to facilitate the staff to more intuitively master the working state of the motor and make corresponding actions, the fault detection device can further include a prompt module for prompting the working state of the motor determined by the processing module 2. Specifically, the prompt module can be a display device, such as a display screen; or a voice broadcast device, which is not particularly limited here.

[0067] Of course, the prompt module can also prompt the first voltage corresponding to each coil collected by the processing module 2, which is not particularly limited here.

[0068] As a preferred embodiment, the prompt module is a display screen.

[0069] In this embodiment, the prompt module can be a display screen. Specifically, the display screen can be an integrated serial port display screen that complies with a serial port communication protocol, which is not particularly limited here.

[0070] As a preferred embodiment, the first controllable switch 1 is a relay.

[0071] In this embodiment, the first controllable switch 1 can be a relay, which has the advantages of small size, fast action, stable operation, and long service life, and can reliably realize the operation of the first controllable switch 1 in this application.

[0072] As a preferred embodiment, it further includes a current stabilizing module 3.

[0073] The current stabilizing module 3 is arranged between the power supply and the parallel circuit, and the input end of the current stabilizing module 3 is connected with the power supply. The first output end of the current stabilizing module 3 is connected with one end of the parallel circuit, and the second output end of the current stabilizing module 3 is connected with the other end of the parallel circuit, for stabilizing the voltage output by the power supply to stabilize the output current of the current stabilizing module 3 at a preset current stabilizing value.

[0074] In this embodiment, further considering that the commonly used power supply is a constant voltage source, the output voltage provided by the constant voltage source is constant, but the corresponding output current may fluctuate. Due to the thermal effect of the current, the accuracy of determining the working state of the motor needs to be improved. Therefore, when the power supply is a constant voltage source, the fault detection device can further include a current stabilizing module 3 to stabilize the voltage output by the power supply, so as to ensure that the output current of the current stabilizing module 3 is stabilized at a preset current stabilizing value. The preset current stabilizing value includes but is not limited to 500mA to meet the needs of fault detection of the motor in the mass spectrometer, but is not particularly limited here, and can be set according to actual needs. It can be seen that the setting of the current stabilizing module 3 avoids the influence of the thermal effect of the current on the detection accuracy of the fault detection device, and further improves the accuracy and practicality of the fault detection device.

[0075] As a preferred embodiment, the current stabilizing module 3 is a constant current source integrated chip.

[0076] In this embodiment, the current stabilizing module 3 can be a constant current source integrated chip, and the working of the current stabilizing module 3 in the application can be realized simply and reliably by a highly integrated constant current source integrated chip.

[0077] Please refer to Figure 3 , Figure 3 A structural schematic diagram of a mass spectrometer provided by the application is shown in the figure.

[0078] The mass spectrometer comprises a control module 6 and a motor in a vacuum cavity, and further comprises a second controllable switch 5 and the fault detection device 4 as described above.

[0079] The fault detection device 4 is connected with the motor.

[0080] The second controllable switch 5 is arranged between the power supply and the fault detection device 4, the first end of the second controllable switch 5 is connected with the power supply, the second end of the second controllable switch 5 is connected with the fault detection device 4, and the control end of the second controllable switch 5 is connected with the control module 6, so as to be turned on when receiving the conduction signal of the control module 6 and turned off when not receiving the conduction signal.

[0081] The control module 6 is used for sending the conduction signal to the second controllable switch 5 when the mass spectrometer is powered on or the mass spectrometer stops isotopic detection or waits to determine the working state of the motor.

[0082] For the mass spectrometer provided by the application, please refer to the above-mentioned embodiments of the fault detection device 4, which will not be described here.

[0083] It should be noted that the mass spectrometer comprises but is not limited to a matrix assisted laser desorption ionization time-of-flight mass spectrometer, and the above-mentioned prompt module can be specifically a host computer in the mass spectrometer, which is not particularly limited here. The mass spectrometer comprises a control module 6, a motor in a vacuum cavity, a second controllable switch 5 and the fault detection device 4 as described above. Of course, as a power system of the mass spectrometer, it comprises the motor and a mechanical structure driven by the motor. Therefore, when the power system fails, such as locked-rotor, it can be caused by the failure of the motor or the failure of the mechanical structure. The fault detection device 4 provided by the application can determine the working state of the motor, so as to determine whether the failure problem is caused by the motor, guide the maintenance personnel to find the fault point in time and accurately, and prepare for replacement of spare parts, so as to shorten the maintenance time, improve the working efficiency, and improve the operation stability of the mass spectrometer.

[0084] Further, the control module 6 cuts out the fault detection device 4 by controlling the second controllable switch 5 to be off, so that the motor and mechanical structure work normally; when it is necessary to determine the working state of the motor, i.e. to perform fault detection, specifically, the second controllable switch 5 can be controlled to be on to make the fault detection device 4 work when the mass spectrometer is started, or the second controllable switch 5 can be controlled to be on to make the fault detection device 4 work when the mass spectrometer stops isotopic detection, or the second controllable switch 5 can be controlled to be on to make the fault detection device 4 work at any time when it is necessary to determine the working state of the motor, which is not particularly limited here, and corresponding control can be performed according to actual needs to realize detection.

[0085] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between various embodiments can be referred to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0086] It should also be noted that the relative terms, such as first and second, in the specification are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0087] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fault detection apparatus, characterized by, The application is applied to a motor in a vacuum cavity of a mass spectrometer, the motor comprises N coils, two ends of the i coil are connected out of the vacuum cavity through the i power supply interface, the fault detection device comprises N first controllable switches and a processing module, wherein N is an even number not less than 2, 1<=i<=N and i is an integer; The i first controllable switch is connected with the i coil in series through the i power supply interface; N series circuits are connected in parallel, and the parallel circuit is connected with the processing module and a power supply respectively; The processing module is further connected with the control end of each first controllable switch, used for controlling each first controllable switch to be turned on respectively, and determining the working state of the motor according to the first voltage between the parallel circuit when each first controllable switch is turned on respectively; The working state of the motor comprises short circuit, open circuit and normal working; When the processing module determines the working state of the motor, it is specifically used for determining that the working state of the motor is short circuit when the first voltage is less than the lower limit of the threshold, determining that the working state of the motor is open circuit when the first voltage is greater than the upper limit of the threshold, and determining that the working state of the motor is normal working when the first voltage is greater than the lower limit of the threshold and less than the upper limit of the threshold; The processing module comprises an AD sampling module, a processor, a timer and a frequency divider; One end of the timer is connected with the power supply, and the other end of the timer is connected with the input end of the frequency divider; The output end of the frequency divider is connected with the control end of each first controllable switch, used for dividing the pulse signal with equal bandwidth sent by the timer to control each first controllable switch to be turned on respectively; The AD sampling module is connected with the parallel circuit and the processor respectively, used for collecting the first voltage between the parallel circuit when each first controllable switch is turned on respectively and transmitting to the processor; The processor is used for determining the working state of the motor according to the first voltage.

2. The fault detection apparatus of claim 1, wherein The processing module further comprises a voltage amplification module; One end of the parallel circuit is connected with the first input end of the voltage amplification module and the first end of the first input channel of the AD sampling module respectively; the other end of the parallel circuit is connected with the second input end of the voltage amplification module and the second end of the first input channel of the AD sampling module respectively; The first output end of the voltage amplification module is connected with the first end of the second input channel of the AD sampling module, and the second output end of the voltage amplification module is connected with the second end of the second input channel of the AD sampling module, used for amplifying the first voltage between the parallel circuit when each first controllable switch is turned on respectively by a preset multiple to obtain a second voltage, so that the second voltage reaches the acquisition resolution threshold of the AD sampling module; The first output channel of the AD sampling module corresponding to the first input channel is connected with the first input end of the processor, and the second output channel of the AD sampling module corresponding to the second input channel is connected with the second input end of the processor.

3. The fault detection apparatus of claim 1, wherein The processor is an MCU.

4. The fault detection apparatus of claim 1, wherein Further comprising a prompt module; The prompting module is connected with the processing module, and is used for prompting a result of the working state of the motor determined by the processing module.

5. The fault detection apparatus of claim 4, wherein, The prompting module is a display screen.

6. The fault detection apparatus of claim 1, wherein, The first controllable switch is a relay.

7. The fault detection apparatus of any one of claims 1 to 6, wherein, The current stabilizing module is further included. The current stabilizing module is arranged between the power supply and the parallel circuit, and an input end of the current stabilizing module is connected with the power supply. A first output end of the current stabilizing module is connected with one end of the parallel circuit, and a second output end of the current stabilizing module is connected with the other end of the parallel circuit. The current stabilizing module is used for stabilizing the voltage output by the power supply, so that the output current of the current stabilizing module is stabilized at a preset current stabilizing value.

8. The fault detection apparatus of claim 7, wherein, The current stabilizing module is a constant current source integrated chip.

9. A mass spectrometer, characterized by, The device further comprises a control module, a motor in a vacuum cavity, a second controllable switch and the fault detection device as claimed in any one of claims 1 to 8. The fault detection device is connected with the motor. The second controllable switch is arranged between the power supply and the fault detection device, and a first end of the second controllable switch is connected with the power supply. A second end of the second controllable switch is connected with the fault detection device. A control end of the second controllable switch is connected with the control module, and is used for being turned on when receiving a conduction signal of the control module, and being turned off when not receiving the conduction signal. The control module is used for sending the conduction signal to the second controllable switch when the mass spectrometer is powered on, or the mass spectrometer stops isotopic detection, or the working state of the motor is to be determined.

Images