CN212378847U - Oil level monitoring circuit and oil level monitoring device - Google Patents
Oil level monitoring circuit and oil level monitoring device Download PDFInfo
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- CN212378847U CN212378847U CN202021076712.9U CN202021076712U CN212378847U CN 212378847 U CN212378847 U CN 212378847U CN 202021076712 U CN202021076712 U CN 202021076712U CN 212378847 U CN212378847 U CN 212378847U
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Abstract
The utility model discloses an oil level monitoring circuit and oil level monitoring devices, wherein, oil level monitoring circuit, include: the system comprises a power supply management module, an air pressure sensor, a vibration sensor and a radio frequency controller; the air pressure sensor is connected with the power management module, comprises a first air pressure monitoring unit and is arranged in the oil tank and used for monitoring the liquid pressure in the oil tank; the vibration sensor is connected with the power management module, arranged on equipment where the oil tank is arranged and used for monitoring a vibration signal of the equipment; the radio frequency controller is connected with the air pressure sensor and the vibration sensor and used for controlling the enabling of the air pressure sensor and the vibration sensor, receiving monitoring data of the air pressure sensor and the vibration sensor and/or transmitting the monitoring data to the calculating module. The air pressure sensor can be used for measuring the oil depth, accurately measuring the bottom pressure of the oil by utilizing the characteristic of high resolution and high precision, calculating the height of the oil, monitoring a vibration signal through the three-axis sensor, and calculating whether the vibration is abnormal or not based on the vibration signal.
Description
Technical Field
The utility model relates to the technical field of circuits, concretely relates to oil level monitoring circuit and oil level monitoring devices.
Background
The fuel level monitoring is the actual need of engineering machinery equipment, designs a high-tech product of research and development, and functions such as collection oil level collection, data analysis, bluetooth data transmission, simple to operate are integrated, can carry out real-time monitoring and analysis to equipment oil consumption process, and it is applicable to trades such as commodity circulation, engineering machinery and uses in various transportation or construction environment, is the indispensable monitoring devices of engineering machinery.
In the related art, the oil level monitoring device generally monitors the oil level by voltage by providing a float in the oil tank, and moving a pointer connected to the float on a resistor when the float slides when the oil level changes; however, when the engineering machinery starts or works, the oil level in the oil tank shakes, so that the float measurement fluctuates, and further, the oil level monitoring is abnormal. Therefore, how to monitor the oil level becomes an urgent technical problem to be solved.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide an oil level monitoring circuit, which solves the problem of how to monitor the oil level.
According to a first aspect, the utility model provides an oil level monitoring circuit, include: the system comprises a power supply management module, an air pressure sensor, a vibration sensor and a radio frequency controller; the air pressure sensor is connected with the power management module, and comprises a first air pressure monitoring unit, a second air pressure monitoring unit and a control unit, wherein the first air pressure monitoring unit is arranged in the oil tank and used for monitoring the liquid pressure in the oil tank; the vibration sensor is connected with the power management module, arranged on equipment where the oil tank is arranged and used for monitoring a vibration signal of the equipment; the radio frequency controller is connected with the air pressure sensor and the vibration sensor and used for controlling the enabling of the air pressure sensor and the vibration sensor and receiving monitoring data of the air pressure sensor and the vibration sensor and/or transmitting the monitoring data to the calculation module.
Optionally, the oil level monitoring circuit further comprises: and the awakening module is connected with the radio frequency controller and used for outputting an awakening signal to the radio frequency controller, and the radio frequency controller awakens the vibration sensor through the enabling pin.
Optionally, the air pressure sensor further comprises a temperature monitoring unit for monitoring the temperature of the oil in the oil tank and performing temperature compensation on the measured value of the liquid pressure based on the temperature of the oil.
Optionally, the oil level monitoring circuit further comprises: and the state monitoring module is connected with the vibration sensor and used for monitoring the plugging state of the vibration sensor.
Optionally, the state monitoring module includes a hall device.
Optionally, the oil level monitoring circuit further comprises a storage module for storing the monitoring data when the radio frequency controller is interrupted.
Optionally, the power management module includes: the power supply comprises a power supply interface, a protection module, a voltage reduction module and a filtering module; the power interface is connected with the short-circuit protection module, and the voltage reduction module is connected with the short-circuit protection module and used for reducing the first direct-current voltage accessed by the power interface and outputting a second direct-current voltage; the filtering module is connected between the voltage reduction module and the short-circuit protection module, and/or is connected to the output end of the voltage reduction module.
Optionally, the protection module comprises: and the self-recovery fuse is connected between the power interface and the voltage reduction module in series.
Optionally, the power management circuit further comprises: and the voltage monitoring module is used for being connected with a power supply, monitoring the power supply voltage and transmitting the power supply voltage to the radio frequency controller.
According to a second aspect, embodiments of the present invention provide an oil level monitoring device, including the oil level monitoring circuit of the first aspect.
The air pressure sensor can be arranged at the bottom of the oil tank by utilizing the characteristic of high resolution and high precision of the air pressure sensor to measure the oil depth, the pressure at the bottom of the oil can be accurately measured, the oil height can be calculated by utilizing the oil density, the oil level can be accurately measured, the vibration signal is monitored by the three-axis sensor, and whether the vibration is abnormal or not is calculated based on the vibration signal. And the monitoring data of the air pressure sensor, such as the oil level descending speed, can be combined to realize the monitoring of the oil tank.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a modular schematic diagram of an oil level monitoring circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a pressure sensor circuit of an oil level monitoring circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a vibration sensor circuit of an oil level monitoring circuit according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a wake-up module of an oil level monitoring circuit according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a radio frequency controller of an oil level monitoring circuit according to an embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a condition monitoring module of an oil level monitoring circuit according to an embodiment of the present invention;
fig. 7 is a schematic circuit diagram of a storage module of an oil level monitoring circuit according to an embodiment of the present invention;
fig. 8 is a schematic circuit diagram of a power management module of an oil level monitoring circuit according to an embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances for purposes of describing the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
An embodiment of the utility model provides an oil level monitoring circuit, as shown in fig. 1, this oil level monitoring circuit can include: the system comprises a power management module 10, an air pressure sensor 20, a vibration sensor 30 and a radio frequency controller 40; the air pressure sensor 20 is connected with the power management module 10, and includes a first air pressure monitoring unit, which is arranged inside the oil tank and is used for monitoring the liquid pressure in the oil tank; the vibration sensor 30 is connected with the power management module 10, arranged on the equipment where the oil tank is located, and used for monitoring a vibration signal of the equipment; the radio frequency controller 40 is connected to the air pressure sensor 20 and the vibration sensor 30, and is configured to control enabling of the air pressure sensor 20 and the vibration sensor 30, and receive monitoring data of the air pressure sensor 20 and the vibration sensor 30 and/or transmit the monitoring data to a computing module. In the present embodiment, as shown in fig. 2, the air pressure sensor 20 may include an LPS27HHW air pressure sensor (U2), wherein the third pin, the fifth pin, the ninth pin and the eleventh pin are connected to a low level; a tenth pin of the air pressure sensor 20 is connected to the power module, and a filter capacitor is disposed between the tenth pin and the eighth pin. In the embodiment, the air pressure sensor 20 can be placed at the bottom of the oil tank to accurately measure the pressure at the bottom of the oil by utilizing the characteristic of high resolution and high accuracy of the oil depth, and the oil level can be accurately measured by utilizing the density of the oil and calculating the height of the oil. In the present embodiment, as shown in fig. 3, the vibration sensor 30(U4) may be disposed on the device where the oil tank is located, or may be disposed on the oil tank, and the vibration sensor 30 may measure a vibration signal of the device and analyze a current state of the device through the vibration signal, for example, a three-axis sensor may be used to measure, and for example, a three-axis accelerometer is used to collect a raw vibration signal of the engine. In this embodiment, sampling may be performed at a predetermined sampling frequency, for example, X points per second may be acquired at intervals Ys. The amplitude and the frequency of the vibration signal can be analyzed, and the fluctuation degree and the frequency distribution state of the vibration signal can be further obtained. The three-axis fluctuation is extremely small in the static state, the three-axis fluctuation is increased sharply in the active state, and the fluctuation degree is along with the intensity of the activity based on the attribute characteristics of the static state and the activity of the machine. Therefore, the machine can be judged to be in a movable or static state through the calculated fluctuation degree of the vibration signal. When the oil tank is stolen, the oil tank or equipment must vibrate, the vibration signal can be monitored through the three-axis sensor, and whether the vibration is abnormal or not can be calculated based on the vibration signal. And the monitoring data of the air pressure sensor 20, such as the oil level descending speed, can be combined to realize the monitoring of the oil tank, for example, whether the oil is stolen or whether the oil consumption is normal can be monitored.
As an exemplary embodiment. In order to save the power consumption of the oil level monitoring device as much as possible, in this embodiment, as shown in fig. 4, a wake-up module 50(U3) is connected to the rf controller 40 (U1-a and U1-B shown in fig. 5) for outputting a wake-up signal to the rf controller 40, and the rf controller 40 wakes up the vibration sensor 30 to be enabled through the enable pin. In this embodiment, the wake-up module 50 may include: the dongle circuit may specifically adopt a TPL5010DDC chip, and is connected to the radio frequency controller 40 through a WAKE pin and a DONE pin to transmit a WAKE-up signal to the radio frequency controller 40, and the radio frequency controller 40 WAKEs up the three-axis sensor and/or the air pressure sensor 20 through an enable pin to enable, that is, may WAKE up through the WAKE-up module 50 when necessary. The electric quantity can be saved to the maximum extent.
As an exemplary embodiment, the air pressure sensor 20 further comprises a temperature monitoring unit for monitoring the temperature of the oil in the oil tank and performing temperature compensation on the measured value of the liquid pressure based on the oil temperature. In this embodiment, a plurality of pressure sensors 20 may be included, wherein one pressure sensor 20 is disposed in the oil tank and is in contact with the oil, for example, may be disposed at the bottom of the oil tank, and another pressure sensor 20 is disposed in the oil tank and is not in contact with the oil, for example, may be disposed at the top of the oil tank or at the oil filling port, and is used for measuring the pressure inside the oil tank, due to the evaporation of the gasoline inside the oil tank, the pressure inside the oil tank increases, which may result in a larger measured value of the sensor for measuring the oil pressure at the bottom of the oil tank, and therefore, the measured hydraulic pressure inside the mailbox may be corrected by the pressure inside the oil tank, for example, the measured hydraulic pressure inside the mailbox may be P1 with the standard atmospheric pressure, P2 with the measured oil pressure being P3, and the: P-P3- (P2-P1). And finally obtaining an accurate value of the hydraulic pressure of the oil tank.
In this embodiment, can also set up a baroceptor 20 in the oil tank outside, through the outside atmospheric pressure of real-time supervision oil tank, combine the inside atmospheric pressure of oil tank, the actual oil pressure of oil tank can be more accurate to the actual oil pressure of obtaining in the actual oil tank of actual oil pressure of actual oil tank in the actual oil pressure of actual oil tank. Specifically, the atmospheric pressure measured by the externally disposed air pressure sensor 20 is P11, the air pressure inside the mailbox is P2, and the measured oil pressure is P3, then the actual oil pressure P should be calculated as: P-P3- (P2-P11).
As an exemplary embodiment, as shown in fig. 6, the oil level monitoring circuit further includes: and the state monitoring module 60 is connected with the vibration sensor 30 and used for monitoring the plugging state of the vibration sensor 30. In this embodiment, the state monitoring module may perform state monitoring based on a hall device, and after the sensor outside the fuel tank is removed, the removal signal may be uploaded to the rf controller 40 through the hall device. As an exemplary embodiment, as shown in fig. 5, the rf controller 40 may include a bluetooth chip, the bluetooth chip is connected to the air pressure sensor 20 and the vibration sensor 30, and the monitoring data of the air pressure sensor 20 and the vibration sensor 30 may be transmitted to the external computing device via bluetooth, so as to calculate the oil level state via the external computing device. Specifically, the bluetooth chip may adopt a CC2640R2FRGZ chip.
As an exemplary embodiment, as shown in fig. 7, the oil level monitoring circuit may further include a storage module 70(U4) for storing the monitoring data when the rf controller 40 is interrupted. Specifically, the memory module 70 may adopt MX25R8035F memory chip.
As an exemplary embodiment, as shown in fig. 8, the power management module 10 includes: the power supply comprises a power supply interface, a short-circuit protection module 11, a voltage reduction module 12 and a filtering module 13;
the power interface is connected with the short-circuit protection module 11, and the voltage reduction module 12 is connected with the short-circuit protection module 11 and is configured to reduce a first direct-current voltage accessed by the power interface and output a second direct-current voltage; the filtering module 13 is connected between the voltage reduction module 12 and the short-circuit protection module 11, and/or is connected to an output end of the voltage reduction module 12. As shown in fig. 8, the short-circuit protection module pack 11 includes: and the self-recovery fuse is connected between the power interface and the voltage reduction module in series. The short-circuit protection module 11 further includes: and the anode of the transient diode is connected with the cathode of the power supply and is grounded, and the cathode of the transient diode is connected with the anode of the power supply through the circuit protection module. The filtering module 13 includes: at least one filter capacitor disposed between an input of the voltage reduction module and ground and/or between an output of the voltage reduction module and ground. As shown in fig. 8, the buck module includes a TPS62740 buck converter. The first pin of the chip is connected with a voltage input end to input 3.6V first direct current voltage, the twelfth pin of the chip is connected with a high level, the eighth pin, the ninth pin, the tenth pin and the eleventh pin of the chip are connected with a low level, and the fifth pin of the chip is connected with a voltage output end to output 1.8V second direct current voltage. The power interface is used for being connected with the lithium sub-battery. The 3.6V voltage output by the battery is reduced to 1.8V through the voltage reduction module, and the energy consumption of the whole circuit can be reduced under the condition that the voltage is reduced and the current is unchanged. In the present embodiment, a high-capacity lithium subcell is used as the battery. In this embodiment, the method may further include: and the voltage monitoring module is used for being connected with a power supply, monitoring the power supply voltage and transmitting the power supply voltage to the radio frequency controller 40.
The embodiment of the utility model provides an oil level monitoring devices installs above-mentioned embodiment oil level monitoring circuit still includes the power supply of high capacity lithium subcell for oil level monitoring devices.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (10)
1. A fuel level monitoring circuit, comprising: the system comprises a power supply management module, an air pressure sensor, a vibration sensor and a radio frequency controller;
the air pressure sensor is connected with the power management module, and comprises a first air pressure monitoring unit, a second air pressure monitoring unit and a control unit, wherein the first air pressure monitoring unit is arranged in the oil tank and used for monitoring the liquid pressure in the oil tank;
the vibration sensor is connected with the power management module, arranged on equipment where the oil tank is arranged and used for monitoring a vibration signal of the equipment;
the radio frequency controller is connected with the air pressure sensor and the vibration sensor and used for controlling the enabling of the air pressure sensor and the vibration sensor, receiving the monitoring data of the air pressure sensor and the monitoring data of the vibration sensor and transmitting the monitoring data of the air pressure sensor and the monitoring data of the vibration sensor to the computing module.
2. The oil level monitoring circuit of claim 1, further comprising:
and the awakening module is connected with the radio frequency controller and used for outputting an awakening signal to the radio frequency controller, and the radio frequency controller awakens the enabling of the vibration sensor through an enabling pin.
3. The oil level monitoring circuit of claim 1, wherein said air pressure sensor further comprises a temperature monitoring unit for monitoring the temperature of the oil in the oil tank and temperature compensating said measured value of the liquid pressure based on said oil temperature.
4. The oil level monitoring circuit of claim 1, further comprising:
and the state monitoring module is connected with the vibration sensor and used for monitoring the plugging state of the vibration sensor.
5. The oil level monitoring circuit of claim 4, wherein the condition monitoring module comprises a Hall device.
6. The oil level monitoring circuit of claim 1, further comprising a storage module for storing said monitoring data upon an interruption of the radio frequency controller.
7. The oil level monitoring circuit of claim 1, wherein the power management module comprises: the power supply comprises a power supply interface, a short-circuit protection module, a voltage reduction module and a filtering module;
the power interface is connected with the short-circuit protection module, and the voltage reduction module is connected with the short-circuit protection module and used for reducing the first direct-current voltage accessed by the power interface and outputting a second direct-current voltage; the filtering module is connected between the voltage reduction module and the short-circuit protection module, and/or is connected to the output end of the voltage reduction module.
8. The oil level monitoring circuit of claim 7, wherein the protection module comprises: and the self-recovery fuse is connected between the power interface and the voltage reduction module in series.
9. The oil level monitoring circuit of claim 8, further comprising:
and the voltage monitoring module is used for being connected with a power supply, monitoring the power supply voltage and transmitting the power supply voltage to the radio frequency controller.
10. An oil level monitoring device comprising an oil level monitoring circuit according to claims 1-9.
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| CN202021076712.9U CN212378847U (en) | 2020-06-11 | 2020-06-11 | Oil level monitoring circuit and oil level monitoring device |
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| CN202021076712.9U CN212378847U (en) | 2020-06-11 | 2020-06-11 | Oil level monitoring circuit and oil level monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111649799A (en) * | 2020-06-11 | 2020-09-11 | 南京智鹤电子科技有限公司 | Oil level monitoring circuit and oil level monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111649799A (en) * | 2020-06-11 | 2020-09-11 | 南京智鹤电子科技有限公司 | Oil level monitoring circuit and oil level monitoring device |
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Address after: 210000 floor 5, block B, China Merchants high speed railway Plaza, No. 9, Jiangnan Road, Dongshan street, Jiangning District, Nanjing, Jiangsu Province Patentee after: NANJING ZHIHE ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 211100 568 dragon sleeping Avenue, Jiangning District, Nanjing, Jiangsu (Jiangning Gao Xinyuan) Patentee before: NANJING ZHIHE ELECTRONIC TECHNOLOGY Co.,Ltd. |
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