Self-generating vibration sensor

Abstract

The utility model relates to a self-generating vibration sensor, and belongs to the technical field of vibration detection. The sensor comprises a magnetoelectric self-generating module and an indicating lamp assembly, the indicating lamp assembly comprises a circuit board and at least two indicating lamps arranged on the circuit board, the magnetoelectric self-generating module is connected with the circuit board, and the circuit board is used for controlling the corresponding indicating lamps to be lightened when the magnetoelectric self-generating module outputs different voltages. According to the utility model, the vibration of the mechanical equipment to be measured is measured through the magnetoelectric self-generating module and the indicating lamp assembly, the overall structure is simple, the cost is low, different vibration amplitudes can be distinguished and represented, the vibration measurement fineness is higher, an external power supply is not needed, and the cost is low. The problem that according to an existing vibration measurement scheme, fine measurement of different vibration amplitudes cannot be achieved through a simple structure is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration detection, in particular to a self-generating vibration sensor. Background Art

[0002] At present, most mechanical equipment such as engines, compressors, motors, etc. will generate vibration during operation. Usually, the vibration amplitude of mechanical equipment in normal operation will not be too large, that is, it will remain within a certain range. However, under abnormal conditions such as aging of mechanical equipment parts and insufficient lubrication, the vibration amplitude of mechanical equipment will increase significantly. Therefore, vibration amplitude monitoring can be used as a diagnostic method for early failures of mechanical equipment.

[0003] Existing mechanical vibration measurement methods are generally divided into contact and non-contact methods. The contact method, such as the Chinese invention patent with publication number CN102135444A, uses a contact vibration sensor to convert the vibration signal into an electrical signal and then sends it to the data acquisition board for processing and analysis to complete the vibration amplitude measurement. The non-contact method, such as the Chinese invention patent with publication number CN116625480A, uses the characteristics of a rolling shutter image acquisition device to make its row arrangement direction parallel to the vibration direction of the object to be measured, and then cooperates with lighting equipment to collect the image of the sampling identification area of ​​the object to be measured to calculate the vibration amplitude and other parameters of the object to be measured.

[0004] It can be seen that the existing solutions that can complete the measurement of different amplitudes of mechanical vibration have the defects of complex system and high cost, while the simple structure, such as the Chinese utility model patent with publication number CN206211817U, can indicate vibration with a simple structure, but cannot distinguish different vibration amplitudes.

[0005] Therefore, how to provide a vibration sensor with a simple structure, low cost and the ability to distinguish and detect vibration amplitudes of different sizes has become an urgent problem to be solved. Utility Model Content

[0006] In view of the above technical problems, the utility model provides a self-generating vibration sensor to solve the problem that the existing vibration measurement scheme cannot realize the measurement of vibration amplitudes of different sizes with a simple structure.

[0007] In the first aspect, the utility model provides a self-generating vibration sensor, comprising: a magnetoelectric self-generating module and an indicator light assembly, wherein the indicator light assembly comprises a circuit board and at least two indicator lights arranged on the circuit board, the output end of the magnetoelectric self-generating module is connected to the input end of the circuit board, and the circuit board is used to control the corresponding indicator light to light up when the magnetoelectric self-generating module outputs voltages of different sizes.

[0008] Optionally, the circuit board includes a first indicator light driving circuit, a second indicator light driving circuit and a reference voltage generating circuit;

[0009] The input end of the reference voltage generating circuit is connected to the positive pole of the power supply, and the output end of the reference voltage generating circuit is connected to the ground end;

[0010] The input end of the first indicator light driving circuit is connected to the cathode of the first indicator light, the anode of the first indicator light is connected to the anode of the power supply, the output end of the first indicator light driving circuit is connected to the ground end, and the conduction control end of the first indicator light driving circuit is connected to the anode of the power supply;

[0011] The control end of the second indicator light driving circuit is connected to the cathode of the second indicator light, the anode of the second indicator light is connected to the anode of the power supply, the reference voltage acquisition end of the second indicator light driving circuit is connected to the input end of the reference voltage generating circuit, the input end of the second indicator light driving circuit is connected to the anode of the power supply, and the output end of the second indicator light driving circuit is connected to the ground end.

[0012] Optionally, the circuit board further includes a third indicator light driving circuit;

[0013] The control end of the third indicator light driving circuit is connected to the cathode of the third indicator light, the anode of the third indicator light is connected to the anode of the power supply, the reference voltage acquisition end of the third indicator light driving circuit is connected to the input end of the reference voltage generating circuit, the input end of the third indicator light driving circuit is connected to the anode of the power supply, and the output end of the third indicator light driving circuit is connected to the ground end.

[0014] Optionally, the reference voltage generating circuit includes a Zener diode, a cathode of the Zener diode is connected to an input end of the reference voltage generating circuit, and an anode of the Zener diode is connected to an output end of the reference voltage generating circuit.

[0015] Optionally, the first indicator light driving circuit includes a first controllable switch, and a first series resistor and a first voltage-dividing resistor which are sequentially connected in series from the positive electrode of the power supply to the output end of the first indicator light driving circuit, the positive electrode of the first controllable switch is connected to the negative electrode of the first indicator light, the negative electrode of the first controllable switch is connected to the ground end, and the control end of the first controllable switch serves as the conduction control end of the first indicator light driving circuit and is connected to an end of the first voltage-dividing resistor close to the first series resistor.

[0016] Optionally, the second indicator light driving circuit includes a first comparator, and a second series resistor and a second voltage-dividing resistor which are sequentially connected in series from the input end of the second indicator light driving circuit to the output end of the second indicator light driving circuit, the inverting input end of the first comparator is connected to an end of the second voltage-dividing resistor close to the second series resistor, the non-inverting input end of the first comparator is connected to a reference voltage acquisition end of the second indicator light driving circuit, the output end of the first comparator is connected to the control end of the second indicator light driving circuit, the positive power supply end of the first comparator is connected to the positive pole of the power supply, and the negative power supply end of the first comparator is connected to the ground end.

[0017] Optionally, the third indicator light driving circuit includes a second comparator, and a third series resistor and a third voltage-dividing resistor which are sequentially connected in series from the input end of the third indicator light driving circuit to the output end of the third indicator light driving circuit, the inverting input end of the second comparator is connected to an end of the third voltage-dividing resistor close to the third series resistor, the non-inverting input end of the second comparator is connected to a reference voltage acquisition end of the third indicator light driving circuit, the output end of the second comparator is connected to the control end of the third indicator light driving circuit, the positive power supply end of the second comparator is connected to the positive pole of the power supply, and the negative power supply end of the second comparator is connected to the ground end.

[0018] Optionally, the circuit board further includes a rectifier module and a filter module, the output end of the magnetoelectric self-generating module is connected to the input end of the rectifier module, the output end of the rectifier module is connected to the input end of the filter module, and the output end of the filter module serves as the positive pole of the power supply;

[0019] The circuit board also includes a first locking circuit, a second locking circuit and a third locking circuit;

[0020] Two ends of the first locking circuit are respectively connected to the conduction control end of the first indicator light driving circuit and the control end of the second indicator light driving circuit;

[0021] Two ends of the second locking circuit are respectively connected to the conduction control end of the first indicator light driving circuit and the control end of the third indicator light driving circuit;

[0022] The input end of the third locking circuit is connected to the positive pole of the power supply, the output end of the third locking circuit is connected to the reference voltage acquisition end of the second indicator light driving circuit, and the conduction control end of the third locking circuit is connected to the control end of the third indicator light driving circuit.

[0023] Optionally, the first locking circuit includes a first locking resistor, and two ends of the first locking resistor are respectively connected to two ends of the first locking circuit;

[0024] The second locking circuit includes a second locking resistor, and two ends of the second locking resistor are respectively connected to two ends of the second locking circuit.

[0025] Optionally, the third locking circuit includes a second controllable switch, the positive pole of the second controllable switch is connected to the input end of the third locking circuit, the negative pole of the second controllable switch is connected to the output end of the third locking circuit, and the control end of the second controllable switch is connected to the conduction control end of the third locking circuit.

[0026] The above scheme has the following beneficial effects:

[0027] The self-generating vibration sensor of the utility model measures the vibration of the mechanical equipment to be measured by means of a magnetoelectric self-generating module and an indicator light assembly. The overall structure is simple and the cost is low. The vibration voltage output by the magnetoelectric self-generating module can be used as a power source without an external power source. Vibration amplitudes of different sizes can be distinguished and characterized, and the vibration measurement precision is higher, which solves the problem that the existing vibration measurement scheme cannot achieve refined measurement of vibration amplitudes of different sizes with a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural block diagram of a self-generating vibration sensor provided in one embodiment of the utility model;

[0029] Figure 2 is a circuit diagram of a circuit board provided in other embodiments of the utility model;

[0030] The symbols are explained as follows:

[0031] 101. magnetoelectric self-generating module; 102. connecting wires; 103. circuit board; 104. LED indicator light; 105. housing; 106. cover; 200. reference voltage generating circuit; 201. first indicator light driving circuit; 202. second indicator light driving circuit; 203. third indicator light driving circuit; 211. first locking circuit; 212. second locking circuit; 213. third locking circuit. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] It should be understood that the embodiments set forth below represent the necessary information to enable those skilled in the art to implement the embodiments and illustrate the best mode for implementing the embodiments. After reading the following description in light of the accompanying drawings, those skilled in the art will understand the concepts of the present disclosure and will recognize applications of these concepts not specifically mentioned herein. It should be understood that these concepts and applications fall within the scope of the present disclosure and the appended claims.

[0034] It should also be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, the first element may be referred to as the second element, and similarly, the second element may be referred to as the first element without departing from the scope of the present disclosure. As used herein, the term "and / or" includes any and all combinations of one or more related listed items.

[0035] It should also be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or intervening elements may be present. Conversely, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements.

[0036] It should also be understood that the terms "upper", "lower", "left", "right", "front", "back", "bottom", "middle", "middle", "top", etc. may be used herein to describe various elements, and the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore these elements should not be limited by these terms.

[0037] These terms are only used to distinguish one element from another element. For example, a first element can be referred to as an "upper" element, and similarly, a second element can be referred to as an "upper" element according to the relative orientation of these elements without departing from the scope of the present disclosure.

[0038] It is further understood that the terms “comprises,” “includes,” “including” and / or “comprising” when used herein specify the presence of stated features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0039] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present disclosure belongs. It will be further understood that the terms used herein should be interpreted as having a meaning consistent with their meaning in the context of this specification and the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined as such herein.

[0040] In one embodiment, a method is provided as follows Figure 1 The structure of the self-generating vibration sensor shown includes: a magnetoelectric self-generating module 101 , a connecting wire 102 , a circuit board 103 , an LED indicator light 104 , a housing 105 and a cover 106 .

[0041] In the present embodiment, the magnetoelectric self-generating module 101 in the self-generating vibration sensor is fixed inside the housing 105, and is connected to the circuit board 103 via the connecting wire 102 so that the electric potential energy generated by the magnetoelectric self-generating module 101 as it vibrates is input into the circuit board 103. The circuit board 103 is connected to a plurality of indicator lights. In the present embodiment, the circuit board 103 is preferably connected to three LED indicator lights 104 of red, yellow and green. After the input end of the circuit board 103 receives the electric potential energy generated by the magnetoelectric self-generating module 101, different indicator lights can be controlled to light up respectively according to the size of the electric potential energy, that is, the size of the voltage.

[0042] That is, the circuit board 103 and the LED indicator light 104 constitute an indicator light assembly, which can control the corresponding indicator light to light up when the magnetoelectric self-generating module 101 outputs voltages of different sizes, thereby representing the different vibration sizes measured by the self-generating vibration sensor through the different lit indicator lights.

[0043] The self-generated vibration sensor of this embodiment can be fixed by pasting the housing 105 to the mechanical device to be tested, which is convenient for installation. In other embodiments, the shape of the housing can be changed to reserve screw holes or buckles for fixing to the mechanical device, thereby completing the fixing of the self-generated vibration sensor to the mechanical device to be tested.

[0044] After the self-generating vibration sensor is fixed to the mechanical equipment to be tested, as the mechanical equipment to be tested operates under various working conditions, the magnetoelectric self-generating module 101 in the self-generating vibration sensor will generate corresponding vibrations of different sizes, thereby generating voltages of different sizes and transmitting them to the indicator light component. The strength of the vibration amplitude is positively correlated with the magnitude of the voltage generated by the magnetoelectric self-generating module 101. Therefore, the vibration amplitude of the mechanical equipment can be judged by comparing the voltage generated by the magnetoelectric self-generating module 101 with different voltage thresholds, and displayed through the three red, yellow and green indicator lights.

[0045] The magnetoelectric self-generating module 101 can adopt existing magnetoelectric devices, such as using an outer coil to wrap the magnetic core inside the coil, and the two ends of the internal magnetic core are fixed by springs. As the coil vibrates back and forth, the wires of each turn cut the magnetic lines of force, so that the coil generates electric potential energy during the vibration process. Finally, the magnetoelectric self-generating module 101 generates voltage and transmits it to the indicator light assembly through the connecting wire 102.

[0046] Since the generation of voltage during the vibration process and the control of the lighting of the corresponding indicator light according to the size of the generated voltage are completed by the magnetoelectric self-generating module 101 and the above-mentioned indicator light assembly, it is easy to understand that in other embodiments, the magnetoelectric self-generating module 101 and the indicator light assembly can also be directly fixed on the mechanical equipment to be tested, and the vibration measurement of the mechanical equipment to be tested can also be completed.

[0047] Since the magnetoelectric self-generating module 101 generates alternating current as it vibrates, the self-generating vibration sensor should also include a rectifier circuit. At the same time, in order to improve the stability of the output voltage amplitude, a filter circuit can be added. The rectifier circuit and the filter circuit can be directly integrated into the magnetoelectric self-generating module 101, or they can be set in the circuit board 103.

[0048] The function of the circuit board 103 is to control the lighting of different indicator lights according to the size of the voltage generated by the magnetoelectric self-generating module 101 as it vibrates to complete the measurement of the vibration size of the mechanical equipment to be tested. At the same time, the voltage generated by the magnetoelectric self-generating module 101 can also be used as a power supply for subsequent circuits such as the circuit board 103.

[0049] It is easy to understand that the number of indicator lights selected in this embodiment is three and the color of each indicator light is different. This is only a preferred embodiment of the feasible scheme of using multiple indicator lights to indicate different vibration magnitudes of the mechanical equipment to be tested. Optionally, the number of indicator lights can be set to a number other than three, such as two, and the colors of the indicator lights can be set to be the same or different.

[0050] For example, when the number of indicator lights is set to two, the indication of different vibration sizes of the mechanical equipment to be tested can be completed by using different numbers of indicator lights that are lit, such as lighting one or two at the same time, or by using different positions of the lit indicator lights, such as lighting only the left indicator light or only the right indicator light at the same time.

[0051] This embodiment measures the vibration of the mechanical equipment to be measured through a magnetoelectric self-generating module and an indicator light assembly. The overall structure is simple and low-cost, and vibration amplitudes of different sizes can be distinguished and characterized. The vibration measurement precision is higher, which solves the problem that the existing vibration measurement scheme cannot realize the measurement of vibration amplitudes of different sizes with a simple structure.

[0052] In one embodiment, a method is provided as follows Figure 2 The specific circuit diagram of the circuit board shown includes a first indicator light driving circuit 201, a second indicator light driving circuit 202, a third indicator light driving circuit 203 and a reference voltage generating circuit 200 for generating a voltage comparison amount.

[0053] First of all, it should be emphasized that although Figure 2 The first locking circuit 211, the second locking circuit 212 and the third locking circuit 213 are also shown, but they are not necessary for completing the control of lighting up corresponding different indicator lights under different vibration amplitudes to complete the differentiated characterization measurement of the vibration magnitude of the mechanical equipment, so this embodiment does not include these three locking circuits.

[0054] In this embodiment, the rectifier module and the filter module described in the above embodiment are arranged in a circuit board, such as Figure 2 As shown, the rectifier diode D1 and the capacitor C1 constitute a rectifier module, the inductor L1, the inductor L2, the capacitor C2 and the capacitor C3 together constitute a filter module, and the internal magnetic core of the magnetoelectric self-generating module 101 moves with the mechanical vibration of the mechanical equipment to be measured, and after cutting the magnetic lines of force to generate electric potential energy Ve, after rectification and filtering by the rectifier module and the filter module, a voltage signal Va with a relatively stable amplitude is output. In this embodiment, the voltage signal Va not only serves as a characterizing signal of the vibration amplitude to be measured, but also serves as a power supply for the subsequent circuit.

[0055] like Figure 2 As shown, the first indicator light driving circuit 201, the second indicator light driving circuit 202, and the third indicator light driving circuit 203 respectively control and drive the first indicator light D4, the second indicator light D3, and the third indicator light D2. In this embodiment, the first, second, and third indicator lights are preferably light emitting diodes of green, yellow, and red colors, respectively. However, in other embodiments, the three indicator lights may be exactly the same color or partially the same color, that is, whether the colors are the same or not does not affect the final distinguishing characterization of the vibration amplitude.

[0056] Furthermore, in this embodiment, the first controllable switch in the first indicator light driving circuit 201 is preferably an NPN transistor. In other embodiments, any other type of controllable switch may be used, such as a controllable diode, a field effect transistor, an IGBT, and the like.

[0057] When the mechanical equipment to be tested is in normal working conditions, its vibration amplitude is small, and the corresponding voltage Va is small. After the first series resistor R4 and the first voltage-dividing resistor R22 in the first indicator light driving circuit 201 are connected to the ground terminal as the voltage signal to be tested, the resistance values ​​of the first series resistor R4 and the first voltage-dividing resistor R22 can be adaptively set to generate a base voltage sufficient to control the conduction of the first controllable switch Q3, so that after Q3 is turned on, the negative pole of the first indicator light D4 can be connected to the ground terminal, and after the positive pole is connected to the voltage Va as the power supply, the first indicator light D4 can be lit, and at this time, the only green light is lit.

[0058] When the mechanical equipment to be tested is in an abnormal working condition that should be warned, its vibration amplitude becomes larger than that of the normal working condition, and the corresponding voltage Va becomes larger. In the second indicator light driving circuit, the voltage between the second series resistor R3 and the second voltage-dividing resistor R9 connected in series between the voltage Va and the ground terminal will increase accordingly. In this embodiment, the second voltage-dividing resistor is preferably an adjustable resistor to adapt to the vibration measurement of different mechanical equipment. The value of the second voltage-dividing resistor can be specifically set according to the voltage of the cathode of the voltage-stabilizing diode D6 in the reference voltage generating circuit 200, and the size of the warning threshold for setting an alarm for the voltage Va under abnormal working conditions.

[0059] For example, when a mechanical device is working normally, the voltage value of the vibration sensor Va is Va_n=2.8V±0.2V, the warning threshold Va_w=1.3*Va_n=3.64V is set, and the voltage zener diode D6 is selected as SZMM3Z2V4T1G, and its corresponding reference voltage is 2.4V. Then, based on the set warning threshold and the multiple relationship between the voltage value Va when the device under test is working normally, the resistance value of the second series resistor R3 and the reference voltage, the second voltage divider resistor R9=4.3k can be determined by calculation.

[0060] Therefore, when the working condition of the equipment to be tested is abnormal and the voltage Va is greater than the warning threshold, the voltage of the non-inverting input terminal of the first comparator U1B will change from the original state greater than the voltage of the inverting input terminal to the state where the voltage of the non-inverting input terminal is less than the voltage of the inverting input terminal, and the output terminal of the first comparator U1B will change from the original high level output to the low level output. Since the positive power supply terminal of the first comparator U1B is connected to the voltage Va and the negative power supply terminal is connected to the ground terminal, the output terminal voltage of the first comparator will specifically change from the original voltage Va to the 0 voltage of the ground terminal, and the voltage difference across the two ends of the second indicator light D3 will change from the original 0 to the voltage Va, thereby lighting up; and, since the base of the first switch tube Q3 in the first indicator light driving circuit, that is, the conduction control terminal, is still connected to the high level, the first indicator light D4 is still lit at this time. In summary, when the working condition of the mechanical equipment to be tested is abnormal, the green light and the yellow light are lit at the same time.

[0061] When the mechanical equipment to be tested is in a more dangerous working condition, its vibration amplitude is larger than that in the above abnormal working condition, and the corresponding voltage Va is larger than that in the abnormal working condition. In the third indicator driving circuit, the voltage between the third series resistor R1 and the third voltage-dividing resistor R6 connected in series between the voltage Va and the ground terminal also increases accordingly. In this embodiment, the third voltage-dividing resistor R6 is also preferably an adjustable resistor to adapt to the vibration measurement of different mechanical equipment. Its specific value can be specifically set according to the voltage of the cathode of the voltage-stabilizing diode D6 in the reference voltage generating circuit 200, and the size of the dangerous threshold value for setting an alarm for the voltage Va under dangerous working conditions.

[0062] For example, when a mechanical device is working normally, the voltage value of the vibration sensor Va is Va_n=2.8V±0.2V, the danger threshold Va_d=1.5*Va_n=4.2V is set, and the voltage zener diode D6 is selected as SZMM3Z2V4T1G, and its corresponding reference voltage is 2.4V. Then, based on the relationship between the set danger threshold and the multiple of the voltage value Va when the device under test is working normally, the resistance value of the third series resistor R1 and the reference voltage, the third voltage divider resistor R6=2.94k can be determined by calculation.

[0063] Therefore, when the working condition of the equipment to be tested is dangerous and the voltage Va is greater than the dangerous threshold, the voltage of the in-phase input terminal of the second comparator U1A will change from the original state of being greater than the voltage of the inverting input terminal to the state of the in-phase input terminal voltage being less than the voltage of the inverting input terminal, and the output terminal of the second comparator U1A will change from the original output high level to the output low level. Since the positive power supply terminal of the second comparator U1A is connected to the voltage Va and the negative power supply terminal is connected to the ground terminal, the output terminal voltage of the second comparator will specifically change from the original voltage Va to the 0 voltage of the ground terminal, and the voltage difference across the third indicator light D2 will change from the original 0 to the voltage Va and light up; and, combined with the above content, it is easy to understand that at this time the first indicator light D4 and the second indicator light D3 are still on. In summary, when the working condition of the mechanical equipment to be tested is dangerous, the green light, yellow light and red light are lit at the same time.

[0064] In summary, when the vibration amplitude voltage Va generated by the vibration of the mechanical equipment to be tested is not greater than the warning threshold, only the first indicator light is on; when the vibration amplitude voltage Va is greater than the warning threshold but not greater than the danger threshold, the first and second indicator lights are on at the same time; when the vibration amplitude voltage Va is greater than the danger threshold, the first, second and third indicator lights are on at the same time. By lighting different numbers of indicator lights, different vibration amplitudes of the mechanical equipment to be tested can be characterized.

[0065] At the same time, as in the above embodiment, in this embodiment, the number of indicator lights is selected to be three and the colors of each indicator light are different. This is also only a preferred embodiment of the feasible scheme of using multiple indicator lights to complete the indication of different vibration magnitudes of the mechanical equipment to be tested. Optionally, the number of indicator lights can be set to a number other than three, such as two, and the colors of the indicator lights can be set to be the same or different.

[0066] When the number of indicator lights is set to two, only the first indicator light driving circuit and the second indicator light driving circuit need to be set. The normal working condition of the mechanical equipment to be tested is represented according to the indication mode that the green light is only lit when driven by the first indicator light driving circuit. The abnormal working condition of the mechanical equipment to be tested is represented according to the indication mode that the green light and the yellow light are simultaneously driven by the first and second indicator light driving circuits. Whether the abnormal working condition further develops to a dangerous working condition is not subdivided.

[0067] This embodiment clarifies how to light up different indicator lights by comparing with a reference voltage when the vibration amplitude voltage generated by the vibration of the mechanical equipment to be tested is different, thereby realizing a specific method for distinguishing the vibration amplitude of the mechanical equipment to be tested.

[0068] In one embodiment, if Figure 2 As shown, in order to further improve the prompt effect of different situations of the vibration amplitude of the mechanical equipment to be tested, the circuit board also includes a first locking circuit 211, a second locking circuit 212 and a third locking circuit 213.

[0069] Based on the three locking circuits, when the working condition of the mechanical equipment to be tested is abnormal:

[0070] At this time, the output end of the first comparator changes from a high level output under normal working conditions to a low level. Then, by connecting the first locking circuit 211 between the output end of the first comparator and the base of the first controllable switch Q3, that is, the conduction control end, specifically, by connecting the first locking resistor R24 ​​between the output end of the first comparator and the base of the first controllable switch Q3, that is, the conduction control end, the voltage of the base of the first controllable switch Q3, that is, the conduction control end, can be pulled down to the low level state output by the output end of the first comparator at this time.

[0071] Therefore, when the mechanical equipment to be tested is in an abnormal working condition and the corresponding yellow second indicator light D3 is lit, the first controllable switch Q3 in the first indicator light driving circuit 201 will be turned off to control the first indicator light D4 to turn off.

[0072] When the mechanical equipment to be tested is in a dangerous condition:

[0073] At this time, the output end of the second comparator changes from a high level output under normal or abnormal conditions to a low level. Then, by connecting the second locking circuit 212 between the output end of the second comparator and the base of the first controllable switch Q3, that is, the conduction control end, specifically, by connecting the second locking resistor R23 between the output end of the second comparator and the base of the first controllable switch Q3, that is, the conduction control end, the voltage of the base of the first controllable switch Q3, that is, the conduction control end, can be pulled down to the low level state output by the output end of the second comparator at this time, thereby first realizing the control of turning off the first indicator light D4.

[0074] At the same time, since the base of the PNP-type second controllable switch in the third locking circuit, that is, the conduction control end of the third locking circuit, is connected to the output end of the second comparator, and the output end of the second comparator changes from a high level to a low level, the second controllable switch will change from a cut-off state to an on state, and the potential of the non-inverting input end of the first comparator will be pulled up to the voltage Va through the second controllable switch. Since the inverting input end of the first comparator is connected to the voltage Va as the positive pole of the power supply through the second series resistor R3 with a resistance value, the voltage of the non-inverting input end of the first comparator can be kept greater than the voltage of the inverting input end, so that the output end of the first comparator outputs a high level, thereby turning off the yellow second indicator light D3.

[0075] That is, when the mechanical equipment to be tested is in a dangerous working condition, the first indicator light D1 can be extinguished by the second locking circuit, and the second indicator light D3 can be extinguished by the third locking circuit, so that only the red third indicator light D2 is lit under this working condition.

[0076] In summary, the above-mentioned first locking circuit 211, second locking circuit 212 and third locking circuit 213 are added to the first indicator light driving circuit 201, the second indicator light driving circuit 202, the third indicator light driving circuit 203 and the reference voltage generating circuit 200. This embodiment realizes that under normal operating conditions where the vibration amplitude of the mechanical equipment to be tested is the smallest, only the green first indicator light is lit; under abnormal operating conditions where the vibration amplitude of the mechanical equipment to be tested is larger than that of the normal operating conditions, only the yellow second indicator light is lit; and under dangerous conditions where the vibration amplitude of the mechanical equipment to be tested is larger than that of the abnormal operating conditions, only the red third indicator light is lit, which further improves the effect of distinguishing and characterizing different vibration conditions of the mechanical equipment to be tested.

[0077] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. A self-generating vibration sensor, characterized in that: include: A magnetoelectric self-generating module and an indicator light assembly, wherein the indicator light assembly includes a circuit board and at least two indicator lights arranged on the circuit board, the output end of the magnetoelectric self-generating module is connected to the input end of the circuit board, and the circuit board is used to control the lighting of corresponding indicator lights when the magnetoelectric self-generating module outputs voltages of different sizes.

2. The self-generating vibration sensor according to claim 1, characterized in that: The circuit board includes a first indicator light driving circuit, a second indicator light driving circuit and a reference voltage generating circuit; The input end of the reference voltage generating circuit is connected to the positive pole of the power supply, and the output end of the reference voltage generating circuit is connected to the ground end; The input end of the first indicator light driving circuit is connected to the cathode of the first indicator light, the anode of the first indicator light is connected to the anode of the power supply, the output end of the first indicator light driving circuit is connected to the ground end, and the conduction control end of the first indicator light driving circuit is connected to the anode of the power supply; The control end of the second indicator light driving circuit is connected to the cathode of the second indicator light, the anode of the second indicator light is connected to the anode of the power supply, the reference voltage acquisition end of the second indicator light driving circuit is connected to the input end of the reference voltage generating circuit, the input end of the second indicator light driving circuit is connected to the anode of the power supply, and the output end of the second indicator light driving circuit is connected to the ground end.

3. The self-generating vibration sensor according to claim 2, characterized in that: The circuit board also includes a third indicator light driving circuit; The control end of the third indicator light driving circuit is connected to the cathode of the third indicator light, the anode of the third indicator light is connected to the anode of the power supply, the reference voltage acquisition end of the third indicator light driving circuit is connected to the input end of the reference voltage generating circuit, the input end of the third indicator light driving circuit is connected to the anode of the power supply, and the output end of the third indicator light driving circuit is connected to the ground end.

4. The self-generating vibration sensor according to claim 2 or 3, characterized in that: The reference voltage generating circuit includes a voltage stabilizing diode, a cathode of the voltage stabilizing diode is connected to an input end of the reference voltage generating circuit, and an anode of the voltage stabilizing diode is connected to an output end of the reference voltage generating circuit.

5. The self-generating vibration sensor according to claim 2 or 3, characterized in that: The first indicator light driving circuit includes a first controllable switch, and a first series resistor and a first voltage-dividing resistor which are sequentially connected in series from the positive electrode of the power supply to the output end of the first indicator light driving circuit, the positive electrode of the first controllable switch is connected to the negative electrode of the first indicator light, the negative electrode of the first controllable switch is connected to the ground end, and the control end of the first controllable switch serves as the conduction control end of the first indicator light driving circuit and is connected to an end of the first voltage-dividing resistor close to the first series resistor.

6. The self-generating vibration sensor according to claim 2 or 3, characterized in that: The second indicator light driving circuit includes a first comparator, and a second series resistor and a second voltage-dividing resistor which are sequentially connected in series from the input end of the second indicator light driving circuit to the output end of the second indicator light driving circuit, the inverting input end of the first comparator is connected to an end of the second voltage-dividing resistor close to the second series resistor, the non-inverting input end of the first comparator is connected to a reference voltage acquisition end of the second indicator light driving circuit, the output end of the first comparator is connected to the control end of the second indicator light driving circuit, the positive power supply end of the first comparator is connected to the positive pole of the power supply, and the negative power supply end of the first comparator is connected to the ground end.

7. The self-generating vibration sensor according to claim 3, characterized in that: The third indicator light driving circuit includes a second comparator, and a third series resistor and a third voltage-dividing resistor which are sequentially connected in series from the input end of the third indicator light driving circuit to the output end of the third indicator light driving circuit, the inverting input end of the second comparator is connected to an end of the third voltage-dividing resistor close to the third series resistor, the non-inverting input end of the second comparator is connected to a reference voltage acquisition end of the third indicator light driving circuit, the output end of the second comparator is connected to the control end of the third indicator light driving circuit, the positive power supply end of the second comparator is connected to the positive pole of the power supply, and the negative power supply end of the second comparator is connected to the ground end.

8. The self-generating vibration sensor according to claim 3 or 7, characterized in that: The circuit board also includes a rectifier module and a filter module, the output end of the magnetoelectric self-generating module is connected to the input end of the rectifier module, the output end of the rectifier module is connected to the input end of the filter module, and the output end of the filter module serves as the positive pole of the power supply; The circuit board also includes a first locking circuit, a second locking circuit and a third locking circuit; Two ends of the first locking circuit are respectively connected to the conduction control end of the first indicator light driving circuit and the control end of the second indicator light driving circuit; Two ends of the second locking circuit are respectively connected to the conduction control end of the first indicator light driving circuit and the control end of the third indicator light driving circuit; The input end of the third locking circuit is connected to the positive pole of the power supply, the output end of the third locking circuit is connected to the reference voltage acquisition end of the second indicator light driving circuit, and the conduction control end of the third locking circuit is connected to the control end of the third indicator light driving circuit.

9. The self-generating vibration sensor according to claim 8, characterized in that: The first locking circuit comprises a first locking resistor, and two ends of the first locking resistor are respectively connected to two ends of the first locking circuit; The second locking circuit includes a second locking resistor, and two ends of the second locking resistor are respectively connected to two ends of the second locking circuit.

10. The self-generating vibration sensor according to claim 8, characterized in that: The third locking circuit includes a second controllable switch, a positive electrode of the second controllable switch is connected to an input end of the third locking circuit, a negative electrode of the second controllable switch is connected to an output end of the third locking circuit, and a control end of the second controllable switch is connected to a conduction control end of the third locking circuit.

Images