A dust screen apparatus fault detection system
By combining a vibration receiving module and an abnormal vibration judgment unit, the problem of low accuracy and reliability of traditional dust removal screening equipment fault detection systems is solved, enabling accurate identification and timely alarm of abnormal vibrations, thus ensuring food quality and production safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINHUANGDAO FUSHOU FOOD CO LTD
- Filing Date
- 2025-10-23
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional dust removal and screening equipment fault detection systems suffer from low accuracy and reliability in food processing, especially in the initial processing stages such as flour, where false alarms are easily caused by changes in flow rate or unstable voltage.
The system employs a vibration receiving module, a vibration comparison module, a control module, an abnormal vibration judgment module, and an alarm module. By receiving vibration signals in real time and processing them with voltage signals, combined with the abnormal vibration judgment unit and the fan control module, it can distinguish between real abnormalities and occasional vibrations, thereby reducing false alarms.
It improves the accuracy and reliability of fault detection in dust removal and screening equipment, reduces false alarms and missed alarms, ensures the stability and safety of the production process, and reduces production costs.
Smart Images
Figure CN224535445U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of fault detection technology, and in particular to a fault detection system for dust removal and screening equipment. Background Technology
[0002] In the food processing industry, dust removal and screening equipment is core equipment for ensuring food quality. Throughout the entire process, from raw grains entering the factory to finished products being produced, dust removal and screening equipment removes impurities, separates materials of different particle sizes, and eliminates dust, ensuring that food meets edible standards and commercial quality requirements. In the initial processing stage of food, such as the initial processing of flour, grain flour, or buckwheat flour, taking flour as an example, screening equipment can separate impurities such as rice husks, packaging debris, bran, or foreign objects from the flour. During fine processing, dust removal equipment removes fine dust, preventing it from contaminating food and ensuring a hygienic and safe processing environment. Its operational status directly affects the quality of food products, production efficiency, and the economic benefits of the enterprise.
[0003] If equipment malfunctions, the amount of impurities remaining in food will increase, which will not only lower the product grade but may also lead to food safety hazards. At the same time, production interruption will disrupt the company's production plan and increase additional production costs.
[0004] Traditional fault detection systems for dust removal and screening equipment in food processing may experience short-term fluctuations in vibration intensity due to changes in food feed flow or occasional voltage instability. In such cases, existing technologies typically trigger alarms directly, resulting in false alarms and low accuracy and stability. Therefore, a stable and reliable fault detection system for dust removal and screening equipment is needed. Utility Model Content
[0005] This disclosure provides a fault detection system for dust removal and screening equipment to address the problems of low accuracy and reliability in fault detection for dust removal and screening equipment.
[0006] This disclosure provides a fault detection system for dust removal and screening equipment, including: a screening vibration receiving module, a screening vibration comparison module, a control module, an abnormal vibration judgment module, and an alarm module; The output of the screening vibration receiving module is connected to the input of the screening vibration comparison module; The output of the vibration comparison module is connected to the input of the control module; The output of the control module is connected to the input of the abnormal vibration detection module; The output of the abnormal vibration detection module is connected to the input of the alarm module; The screening vibration receiving module is used to receive the vibration of the dust removal screening equipment.
[0007] In one exemplary embodiment of this disclosure, the control module has two input terminals; The vibration comparison module includes: a first vibration comparator and a second vibration comparator; The in-phase input of the first vibration comparator and the inverting input of the second vibration comparator are both connected to the output of the screening vibration receiving module. The output of the first vibration comparator is connected to the first input of the control module; the output of the second vibration comparator is connected to the second input of the control module. The inverting input of the first vibration comparator is used to receive the first vibration reference value Vref1; The inverting input of the second vibration comparator is used to receive the second vibration reference value Vref2.
[0008] In one exemplary embodiment of this disclosure, the control module has two output terminals; The abnormal vibration judgment module includes: a first abnormal vibration judgment unit and a second abnormal vibration judgment unit; The input terminal of the first abnormal vibration judgment unit is connected to the first output terminal of the control module; The input terminal of the second abnormal vibration judgment unit is connected to the second output terminal of the control module; The output terminals of both the first and second abnormal vibration judgment units are connected to the input terminal of the alarm module.
[0009] In one exemplary embodiment of this disclosure, the first abnormal vibration judgment unit includes: transistor Q3, resistor R4, resistor R5, resistor R8, capacitor C1, and operational amplifier U4; The base of transistor Q3 is connected to the first output terminal of the control module, the collector of transistor Q3 is connected to the power supply, and the emitter of transistor Q3 is connected to the first terminal of capacitor C1 through resistor R4. The second terminal of capacitor C1 is grounded, and resistor R8 is connected in parallel with capacitor C1. The first terminal of capacitor C1 is connected to the non-inverting input terminal of operational amplifier U4, and the inverting input terminal of operational amplifier U4 is used to receive the first voltage reference value Vref3; the output terminal of operational amplifier U4 is connected to the input terminal of alarm module through resistor R5.
[0010] In one exemplary embodiment of this disclosure, the second abnormal vibration judgment unit includes: transistor Q4, resistor R6, resistor R7, capacitor C2, and operational amplifier U6; The base of transistor Q4 is connected to the second output terminal of the control module; the emitter of transistor Q4 is connected to the power supply; and the collector of transistor Q4 is grounded through capacitor C2. Resistor R6 is connected in parallel with capacitor C2; The inverting output of operational amplifier U5 is connected to the collector of transistor Q4, and the non-inverting input of operational amplifier U5 is used to receive the second voltage reference value Verf4. The output of operational amplifier U5 is connected to the input of the alarm module through resistor R7.
[0011] In one exemplary embodiment of this disclosure, the alarm module includes: a transistor Q1 and a buzzer F1; The base of transistor Q1 is connected to the output terminal of the abnormal vibration detection module, the collector of transistor Q1 is used to connect to the power supply, and the emitter of transistor Q1 is connected to the positive terminal of buzzer F1. The negative terminal of buzzer F1 is grounded.
[0012] In one exemplary embodiment of this disclosure, a dust removal and screening equipment fault detection system further includes: a fan control module; The input terminal of the fan control module is connected to the output terminal of the screening vibration receiving module.
[0013] In one exemplary embodiment of this disclosure, the wind turbine control module includes: a relay K1, an operational amplifier U6, a transistor Q2, and a wind turbine control unit; The first input terminal of relay K1 is connected to the power supply, the second input terminal of relay K1 is connected to the collector of transistor Q2, the first input terminal of relay K1 is connected to the output terminal of the screening vibration receiving module, and the second input terminal of relay K1 is grounded through the fan control unit. The non-inverting input of operational amplifier U6 is connected to the output of the vibration receiving module; the inverting input of operational amplifier U6 is used to receive the third voltage reference value Vref5; and the output of operational amplifier U6 is connected to the base of transistor Q2. The emitter of transistor Q2 is grounded.
[0014] The beneficial effects of the dust removal and screening equipment fault detection system provided in this embodiment are as follows: This disclosure utilizes a vibration receiving module to receive vibration signals from a dust removal and screening device in real time, converting them into voltage signals for further processing. A vibration comparison module compares the received voltage signals with a preset reference signal, enabling a preliminary determination of whether the device exhibits abnormal vibration. Furthermore, by introducing an abnormal vibration judgment module, this disclosure can further distinguish between genuine abnormalities and occasional vibration anomalies caused by external factors such as changes in feed flow rate, thus improving the accuracy and reliability of fault identification in the dust removal and screening device. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the structure of a dust removal and screening equipment fault detection system provided in an embodiment of this disclosure; Figure 2 This is a schematic diagram of the structure of the second type of dust removal and screening equipment fault detection system provided in this embodiment of the present disclosure; Figure 3 This is a schematic diagram of the structure of the third dust removal and screening equipment fault detection system provided in the embodiments of this disclosure. Detailed Implementation
[0017] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this solution will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this solution, not all of them. Based on the embodiments of this solution, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this solution.
[0018] The term "comprising" and any other variations thereof in the specification, claims, and accompanying drawings of this invention mean "including but not limited to," and are intended to cover a non-exclusive inclusion, not limited to the examples listed herein. Furthermore, the terms "first" and "second," etc., are used to distinguish different objects, not to describe a specific order.
[0019] The implementation of this disclosure will be described in detail below with reference to the specific accompanying drawings: Figure 1 This is a schematic diagram of a fault detection system for a dust removal and screening equipment provided in an embodiment of this disclosure. (Refer to...) Figure 1 The dust removal and screening equipment fault detection system includes a screening vibration receiving module 10, a screening vibration comparison module 11, a control module 12, an abnormal vibration judgment module 13, and an alarm module 14. The output terminal of the screening vibration receiving module 10 is connected to the input terminal of the screening vibration comparison module 11; The output of the vibration comparison module 11 is connected to the input of the control module 12; The output terminal of the control module 12 is connected to the input terminal of the abnormal vibration judgment module 13; The output terminal of the abnormal vibration judgment module 13 is connected to the input terminal of the alarm module 14; The screening vibration receiving module 10 is used to receive the vibration of the dust removal screening equipment.
[0020] In this embodiment, after receiving the vibration of the dust removal screening equipment, the screening vibration receiving module 10 converts the vibration signal into a voltage signal and sends it to the screening vibration comparison module 11. The screening vibration comparison module 11 compares the received voltage signal with a preset reference signal and sends the comparison result to the control module 12. If the comparison result indicates a possible vibration abnormality (exceeding the preset reference signal is considered a possible vibration abnormality), the control module 12 sends the voltage signal to the abnormal vibration judgment module 13 to further determine whether the current vibration is a real abnormality or an occasional vibration abnormality caused by a change in the feed flow rate. If it is a real abnormality, the alarm module 14 is controlled to sound an alarm.
[0021] Figure 3 This is a schematic diagram of the structure of the third type of dust removal and screening equipment fault detection system provided in this embodiment. (Reference) Figure 3 The vibration receiving module 10 may include: a piezoelectric ceramic sheet P1, a resistor R1, a resistor R2, an operational amplifier U1, and a resistor R3; The first end of the piezoelectric ceramic sheet P1 is connected to the non-inverting input of the operational amplifier U1 through a resistor R2; the second end of the piezoelectric ceramic sheet P1 is grounded. The output terminal of operational amplifier U1 is connected to the inverting input terminal of operational amplifier U1 through resistor R3, and the inverting input terminal of operational amplifier U1 is grounded through resistor R1.
[0022] In this embodiment, the piezoelectric ceramic can be used as a vibration detection device. However, since the voltage generated by the piezoelectric ceramic itself is relatively weak, the voltage of the piezoelectric ceramic sheet P1 can be amplified by a non-inverting amplifier composed of resistors R1 and R2, operational amplifier U1 and resistor R3 for subsequent comparison and processing.
[0023] As can be seen from the above, this disclosure uses a vibration receiving module 10 to receive vibration signals from the dust removal and screening equipment in real time, converts them into voltage signals for subsequent processing, and a vibration comparison module 11 compares the received voltage signals with a preset reference signal to preliminarily determine whether the equipment has abnormal vibration. Furthermore, by introducing an abnormal vibration judgment module 13, this disclosure can further distinguish between genuine abnormal situations and occasional vibration abnormalities caused by external factors such as changes in feed flow rate, thus improving the accuracy and reliability of fault identification in the dust removal and screening equipment.
[0024] Figure 2 This is a schematic diagram of the structure of the second type of dust removal and screening equipment fault detection system provided in this embodiment. (Reference) Figure 2In one embodiment of this disclosure, the control module 12 has two input terminals; The vibration comparison module 11 includes: a first vibration comparator 111 and a second vibration comparator 112; The in-phase input terminal of the first vibration comparator 111 and the inverting input terminal of the second vibration comparator 112 are both connected to the output terminal of the screening vibration receiving module 10. The output terminal of the first vibration comparator 111 is connected to the first input terminal of the control module 12; the output terminal of the second vibration comparator 112 is connected to the second input terminal of the control module 12. The inverting input of the first vibration comparator 111 is used to receive the first vibration reference value Vref1; The inverting input of the second vibration comparator 112 is used to receive the second vibration reference value Vref2.
[0025] Control module 12 has two output terminals; The abnormal vibration judgment module 13 includes: a first abnormal vibration judgment unit 131 and a second abnormal vibration judgment unit 132; The input terminal of the first abnormal vibration judgment unit 131 is connected to the first output terminal of the control module 12; The input terminal of the second abnormal vibration judgment unit 132 is connected to the second output terminal of the control module 12; The output terminals of the first abnormal vibration judgment unit 131 and the second abnormal vibration judgment unit 132 are both connected to the input terminal of the alarm module 14.
[0026] In this embodiment, the first vibration comparator 111 can compare the received voltage signal with a preset first vibration reference value Vref1. If the received voltage signal is greater than the first vibration reference value Vref1, the first vibration comparator 111 sends a high-level signal to the control module 12.
[0027] The second vibration comparator 112 can compare the received voltage signal with the preset second vibration reference value Vref2. If the received voltage signal is less than the second vibration reference value Vref2, the second vibration comparator 112 sends a high-level signal to the control module 12.
[0028] The control module 12 is configured to receive a high-level signal from the first vibration comparator 111 and control the first abnormal vibration judgment unit 131 to perform abnormal vibration judgment, and to receive a high-level signal from the second vibration comparator 112 and control the second abnormal vibration judgment unit 132 to perform abnormal vibration judgment.
[0029] Figure 3 This is a schematic diagram of the structure of the third type of dust removal and screening equipment fault detection system provided in this embodiment. (Reference) Figure 3 In this embodiment, the first abnormal vibration judgment unit 131 includes: transistor Q3, resistor R4, resistor R5, resistor R8, capacitor C1 and operational amplifier U4; The base of transistor Q3 is connected to the first output terminal of control module 12, the collector of transistor Q3 is connected to the power supply, and the emitter of transistor Q3 is connected to the first terminal of capacitor C1 through resistor R4. The second terminal of capacitor C1 is grounded, and resistor R8 is connected in parallel with capacitor C1. The first end of capacitor C1 is connected to the non-inverting input of operational amplifier U4, and the inverting input of operational amplifier U4 is used to receive the first voltage reference value Vref3; the output of operational amplifier U4 is connected to the input of alarm module 14 through resistor R5.
[0030] The second abnormal vibration judgment unit 132 includes: transistor Q4, resistor R6, resistor R7, capacitor C2 and operational amplifier U6; The base of transistor Q4 is connected to the second output terminal of control module 12; the emitter of transistor Q4 is connected to the power supply, and the collector of transistor Q4 is grounded through capacitor C2. Resistor R6 is connected in parallel with capacitor C2; The inverting output of operational amplifier U5 is connected to the collector of transistor Q4, and the non-inverting input of operational amplifier U5 is used to receive the second voltage reference value Verf4. The output of operational amplifier U5 is connected to the input of alarm module 14 through resistor R7.
[0031] Alarm module 14 includes: transistor Q1 and buzzer F1; The base of transistor Q1 is connected to the output terminal of abnormal vibration judgment module 13, the collector of transistor Q1 is used to connect to the power supply, and the emitter of transistor Q1 is connected to the positive terminal of buzzer F1. The negative terminal of buzzer F1 is grounded.
[0032] In this embodiment, transistor Q3 is an NPN transistor. When the control module 12 receives a high-level signal from the first vibration comparator 111 (i.e., the vibration intensity is greater than the preset first vibration reference value Vref1), it can send a high-level signal to the base of transistor Q3. At this time, transistor Q3 is turned on, and the power supply charges capacitor C1 through resistor R4. The voltage of capacitor C1 will not change abruptly, so the voltage of the non-inverting comparator of operational amplifier U4 will gradually increase with the charging process of capacitor C1 until it exceeds the preset first voltage reference value Vref3. At this time, operational amplifier U4 outputs a high level, transistor Q1 is turned on, buzzer F1 is connected to the power supply, and an alarm sound is emitted. When the vibration intensity is only occasionally too high, the control module 12 does not send a high-level signal, transistor Q3 returns to the off state, and the voltage of capacitor C1 discharges through resistor R8, i.e., the reset function. In other words, capacitor C1 performs a delay function. When the abnormal time exceeds the charging time of capacitor C1, it is judged as abnormal. If the fault is intermittent and the time is short, no alarm will be triggered, thereby reducing false judgments.
[0033] Similarly, transistor Q4 is a PNP transistor. When the control module 12 does not receive a high-level signal from the second vibration comparator 112, the control module 12 does not operate; that is, the base of transistor Q4 is at a low level, and the emitter is at a high level. At this time, transistor Q4 is turned on, charging capacitor C2. When the control module 12 receives a high-level signal from the second vibration comparator 112, it sends a high-level signal to the base of transistor Q4. At this time, transistor Q4 is turned off, and capacitor C2 discharges through resistor R6 until it is lower than the preset second voltage reference value Verf4. At this time, operational amplifier U5 outputs a high-level signal, transistor Q1 is turned on, buzzer F1 is connected to the power supply, and an alarm sound is emitted.
[0034] As can be seen from the above, this disclosure employs a first vibration comparator 111 and a second vibration comparator 112 to perform threshold comparisons on the received voltage signals from two directions, thereby enhancing the accuracy of vibration anomaly judgment and reducing false or missed judgments. The control module 12, based on the output of the vibration comparators, controls the abnormal vibration judgment unit to perform further judgment. Once abnormal vibration is confirmed, the alarm module 14 is immediately triggered, emitting an alarm sound via buzzer F1 to notify operators or maintenance teams for handling, thus minimizing the impact of the fault on the production process. In the abnormal vibration judgment unit, the use of capacitors and resistors enables a reset function for the judgment result. When the vibration anomaly disappears, this disclosure can automatically return to the initial state, awaiting the next vibration signal input, enhancing the stability and reliability of fault detection.
[0035] In one embodiment of this disclosure, a dust removal and screening equipment fault detection system further includes: a fan control module 15; The input terminal of the fan control module 15 is connected to the output terminal of the screening vibration receiving module 10.
[0036] The fan control module 15 includes: relay K1, operational amplifier U6, transistor Q2 and fan control unit; The first input terminal of relay K1 is connected to the power supply, the second input terminal of relay K1 is connected to the collector of transistor Q2, the first input terminal of relay K1 is connected to the output terminal of the screening vibration receiving module, and the second input terminal of relay K1 is grounded through the fan control unit. The non-inverting input of operational amplifier U6 is connected to the output of the vibration receiving module; the inverting input of operational amplifier U6 is used to receive the third voltage reference value Vref5; and the output of operational amplifier U6 is connected to the base of transistor Q2. The emitter of transistor Q2 is grounded.
[0037] In this embodiment, considering that higher vibration intensity generates more dust, the fan should operate at a higher speed to remove dust. Therefore, the voltage signal received by the vibration receiving module 10 is used to power the fan control unit. The higher the voltage received by the fan control unit, the stronger the control of the fan speed. To prevent damage to the fan control unit due to excessive voltage, an overvoltage protection circuit is provided. The principle is that when the voltage sent by the vibration receiving module 10 exceeds the preset third voltage reference value Vref5, the operational amplifier U6 sends a high-level signal. At this time, transistor Q2 conducts and relay K1 disconnects, and the fan control unit does not operate. It should be noted that no alarm is triggered at this time because when the fan control unit experiences overvoltage, it indicates severe vibration abnormalities, and the alarm module 14 has already started alarming, so no further alarm is needed. It should be noted that if used for flour screening (such as cyclone sieves or intelligent dust-free screening systems), the fan speed and pressure should be set within a reasonable range according to the specific gravity and particle characteristics of the flour. The upper limit of the reasonable range can be determined based on a limited number of experiments, and then a suitable fan can be selected or an upper limit can be set for the fan speed.
[0038] As can be seen from the above, this disclosure can regulate the fan speed based on the voltage signal received by the vibration receiving module 10. When the vibration intensity increases, the amount of dust generated will also increase accordingly. At this time, by increasing the fan speed, the dust removal effect is enhanced, ensuring the normal operation of the equipment and the cleanliness of the working environment. When the voltage sent by the vibration receiving module 10 exceeds the preset third voltage reference value Vref5, the operational amplifier U6 will send a high-level signal, turning on the transistor Q2 and disconnecting the relay K1, thereby cutting off the power supply to the fan control unit, protecting it from damage, and improving the safety and reliability of this disclosure.
[0039] The above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit it. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this disclosure.
Claims
1. A fault detection system for dust removal and screening equipment, characterized in that, include: The system includes a vibration receiving module, a vibration comparison module, a control module, an abnormal vibration judgment module, and an alarm module. The output terminal of the screening vibration receiving module is connected to the input terminal of the screening vibration comparison module; The output of the screening vibration comparison module is connected to the input of the control module; The output terminal of the control module is connected to the input terminal of the abnormal vibration judgment module; The output terminal of the abnormal vibration detection module is connected to the input terminal of the alarm module; The screening vibration receiving module is used to receive the vibration of the dust removal screening equipment.
2. The dust removal and screening equipment fault detection system as described in claim 1, characterized in that, The control module has two input terminals; The screening vibration comparison module includes: a first vibration comparator and a second vibration comparator; The non-inverting input of the first vibration comparator and the inverting input of the second vibration comparator are both connected to the output of the screening vibration receiving module. The output terminal of the first vibration comparator is connected to the first input terminal of the control module; the output terminal of the second vibration comparator is connected to the second input terminal of the control module. The inverting input of the first vibration comparator is used to receive the first vibration reference value Vref1; The inverting input of the second vibration comparator is used to receive the second vibration reference value Vref2.
3. The dust removal and screening equipment fault detection system as described in claim 1, characterized in that, The control module has two output terminals; The abnormal vibration judgment module includes: a first abnormal vibration judgment unit and a second abnormal vibration judgment unit; The input terminal of the first abnormal vibration judgment unit is connected to the first output terminal of the control module; The input terminal of the second abnormal vibration judgment unit is connected to the second output terminal of the control module; The output terminals of the first abnormal vibration judgment unit and the second abnormal vibration judgment unit are both connected to the input terminal of the alarm module.
4. The dust removal and screening equipment fault detection system as described in claim 3, characterized in that, The first abnormal vibration judgment unit includes: transistor Q3, resistor R4, resistor R5, resistor R8, capacitor C1, and operational amplifier U4; The base of transistor Q3 is connected to the first output terminal of the control module, the collector of transistor Q3 is connected to the power supply, and the emitter of transistor Q3 is connected to the first terminal of capacitor C1 through resistor R4. The second terminal of capacitor C1 is grounded, and resistor R8 is connected in parallel with capacitor C1; The first end of the capacitor C1 is connected to the non-inverting input of the operational amplifier U4, and the inverting input of the operational amplifier U4 is used to receive the first voltage reference value Vref3; the output of the operational amplifier U4 is connected to the input of the alarm module through the resistor R5.
5. The dust removal and screening equipment fault detection system as described in claim 3, characterized in that, The second abnormal vibration judgment unit includes: transistor Q4, resistor R6, resistor R7, capacitor C2 and operational amplifier U6; The base of transistor Q4 is connected to the second output terminal of the control module; the emitter of transistor Q4 is connected to the power supply; and the collector of transistor Q4 is grounded through capacitor C2. The resistor R6 is connected in parallel with the capacitor C2; The inverting output terminal of the operational amplifier U5 is connected to the collector of the transistor Q4, and the non-inverting input terminal of the operational amplifier U5 is used to receive the second voltage reference value Verf4. The output of the operational amplifier U5 is connected to the input of the alarm module through the resistor R7.
6. The dust removal and screening equipment fault detection system as described in claim 1, characterized in that, The alarm module includes: transistor Q1 and buzzer F1; The base of transistor Q1 is connected to the output terminal of the abnormal vibration judgment module, the collector of transistor Q1 is used to connect to the power supply, and the emitter of transistor Q1 is connected to the positive terminal of buzzer F1. The negative terminal of the buzzer F1 is grounded.
7. The dust removal and screening equipment fault detection system as described in claim 1, characterized in that, Also includes: Fan control module; The input terminal of the fan control module is connected to the output terminal of the screening vibration receiving module.
8. The dust removal and screening equipment fault detection system as described in claim 7, characterized in that, The fan control module includes: relay K1, operational amplifier U6, transistor Q2 and fan control unit; The first input terminal of the relay K1 is connected to the power supply, the second input terminal of the relay K1 is connected to the collector of the transistor Q2, the first input terminal of the relay K1 is connected to the output terminal of the screening vibration receiving module, and the second input terminal of the relay K1 is grounded through the fan control unit. The non-inverting input of the operational amplifier U6 is connected to the output of the screening vibration receiving module; the inverting input of the operational amplifier U6 is used to receive the third voltage reference value Vref5; and the output of the operational amplifier U6 is connected to the base of the transistor Q2. The emitter of the transistor Q2 is grounded.