Flow rate acquisition circuit, refueling metering circuit and refueling meter

Abstract

The present application discloses a flow rate acquisition circuit. The flow rate acquisition circuit includes an electric signal acquisition module, which cooperates with a turbine to generate a disturbance electric signal under the interference of turbine rotation. The output end of the electric signal acquisition module is connected to the input end of the electric signal amplification module; the input end of the electric signal amplification module is connected to the electric signal acquisition module, and the output end is connected to the input end of the square wave generation module; the input end of the square wave generation module is connected to the output end of the electric signal amplification module. The present application solves the technical problem of obtaining the actual refueling amount of a car in an energy-saving manner.

Description

Technical Field

[0001] The present application relates to the field of communications, and in particular to a flow rate acquisition circuit, a refueling metering circuit and a refueling meter. Background Art

[0002] In recent years, with the continuous development of the economy, the number of cars in various places has been rising year by year, and cars have become the most popular modern means of transportation. Refueling a car is a common operation related to cars, and a variety of refueling devices have appeared on the market. However, as the price of automobile fuel continues to rise, some unscrupulous operators of gas stations illegally modify the metering device of the gas station to obtain more profits, making the actual oil output of the gas station far lower than the nominal oil output of the gas station, and there is a behavior of short-changing. How to obtain the actual amount of fuel in the car has become a problem that many car owners want to solve.

[0003] When measuring the amount of fuel by a contact device, the fuel port needs to be sealed with components, which has the disadvantage of a complex structure of the fuel port. When measuring by a non-contact device, a magnet is added to the turbine in the oil pipe and measured by Hall magnetic induction, but the magnet will absorb impurities in the oil, which will eventually make the sensor unusable. Non-contact devices can also be measured in the form of an oscillator, which first generates oscillations in the circuit by measuring inductance, and changes the inductance through a metal turbine, but this measurement method will cause the circuit to oscillate all the time, which is very power-consuming. There is currently no effective solution to the problem of how to obtain the actual amount of fuel in a car in an energy-saving manner. Summary of the invention

[0004] The main purpose of the present application is to provide a flow rate acquisition circuit to solve the problem of obtaining the actual refueling amount of a car in an energy-saving manner.

[0005] In order to achieve the above-mentioned objectives, the present application provides a flow rate acquisition circuit, a refueling metering circuit and a refueling meter.

[0006] In a first aspect, the present application provides a flow velocity acquisition circuit.

[0007] The flow rate acquisition circuit according to the present application includes:

[0008] The electric signal acquisition module cooperates with the turbine to generate a disturbance electric signal under the interference of the turbine rotation, and the output end of the electric signal acquisition module is connected to the input end of the electric signal amplification module;

[0009] An electric signal amplifying module, the input end of which is connected to the electric signal acquiring module, and the output end of which is connected to the input end of the square wave generating module;

[0010] The input end of the square wave generating module is connected to the output end of the electric signal amplifying module.

[0011] Furthermore, the electrical signal acquisition module includes:

[0012] The inductor has an input end and an output end connected to the input end of the electric signal amplification module, and the input end of the inductor is connected to the input end of the square wave generation module.

[0013] Preferably, the turbine is arranged within the magnetic field generated by the inductor.

[0014] Specifically, the inductor includes an inductor coil and a magnet.

[0015] Furthermore, the signal amplification module includes: a first resistor, a second resistor, and a first operational amplifier; and

[0016] One end of the first resistor is connected to one end of the second resistor and the inverting input end of the first operational amplifier, and the other end of the first resistor is connected to the output end of the electrical signal acquisition module;

[0017] One end of the second resistor is connected to one end of the first resistor and the inverting input end of the first operational amplifier, and the other end of the second resistor is connected to the output end of the first operational amplifier and the input end of the square wave generating module;

[0018] The positive input terminal of the first operational amplifier is connected to the input terminal of the electrical signal acquisition module, the reverse input terminal of the first operational amplifier is connected to one end of the first resistor and one end of the second resistor, and the output terminal of the first operational amplifier is connected to the other end of the second resistor and the input terminal of the square wave generation module.

[0019] Further, the square wave generating module includes: a third resistor, a fourth resistor, and a second operational amplifier; and

[0020] One end of the third resistor is connected to one end of the fourth resistor, the positive input end of the second operational amplifier, and the output end of the electrical signal amplification module, and the other end of the third resistor is connected to the output end of the electrical signal amplification module;

[0021] One end of the fourth resistor is connected to one end of the third resistor and the positive input end of the second operational amplifier, and the other end of the fourth resistor is connected to the output end of the second operational amplifier;

[0022] The positive input terminal of the second operational amplifier is connected to one end of the third resistor and one end of the fourth resistor, and the negative input terminal of the second operational amplifier is connected to the input terminal of the electrical signal acquisition module;

[0023] The power filter unit is connected to the power input terminal of the second operational amplifier.

[0024] Furthermore, the flow velocity acquisition circuit also includes: a filtering unit.

[0025] Preferably, the filtering unit includes any one of the following or a combination thereof:

[0026] One end of the filter unit is connected to the input end of the electric signal amplification module, and the other end is connected to the input end of the electric signal acquisition module;

[0027] One end of the filter unit is connected to the input end of the electrical signal acquisition module, and the other end is grounded;

[0028] One end of the filter unit is connected to the input end of the electric signal amplification module, and the other end is grounded;

[0029] One end of the filter unit is connected to the input end of the square wave generation module, and the other end is connected to the input end of the electrical signal acquisition module;

[0030] One end of the filter unit is connected to the input end of the square wave generating module, and the other end is grounded.

[0031] In a second aspect, the present application provides a refueling metering circuit, the circuit comprising:

[0032] Flow rate acquisition circuit;

[0033] The data transmission circuit is connected to the flow velocity collection circuit and transmits the square wave signal output by the flow velocity collection circuit.

[0034] Furthermore, the refueling metering circuit further includes any one of the following items or a combination thereof:

[0035] Sensor circuit, display circuit, storage circuit, power circuit, key circuit, clock circuit.

[0036] In a third aspect, the present application provides a refueling meter, including: a refueling metering circuit.

[0037] In the embodiment of the present application, only when the turbine is set within the range of the generated magnetic field, the magnetic field changes caused by the rotation of the turbine are used to cause electric field changes. By amplifying the obtained disturbance electrical signal, a square wave signal is obtained, thereby achieving the technical effect of flow velocity collection, and further solving the technical problem of obtaining the actual refueling amount of the car in an energy-saving manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0039] Figure 1 is a circuit diagram of a flow velocity acquisition circuit according to an embodiment of the present application; and

[0040] Figure 2 It is a circuit schematic diagram of a flow velocity acquisition circuit according to an embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0042] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0043] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0044] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] like Figure 1 As shown, the flow velocity acquisition circuit 1 includes:

[0047] The electric signal acquisition module 11 cooperates with the turbine to generate a disturbance electric signal under the interference of the turbine rotation. The output end of the electric signal acquisition module 11 is connected to the input end of the electric signal amplification module 12 .

[0048] Furthermore, the electrical signal acquisition module 11 includes:

[0049] The inductor 111 has an input end and an output end connected to the input end of the electric signal amplifying module 12 , and an input end connected to the input end of the square wave generating module 13 .

[0050] Furthermore, the interference of turbine rotation in the electrical signal acquisition module 11 includes:

[0051] When the turbine rotates, the magnetic field of the inductor 111 changes, generating a disturbing magnetic field, and the inductor 111 generates a disturbing electrical signal;

[0052] When the turbine stops rotating, the disturbance magnetic field of the inductor 111 changes, and the inductor 111 stops generating the disturbance electric signal.

[0053] Preferably, the turbine is disposed within the magnetic field generated by the inductor 111 .

[0054] Specifically, the inductor 111 includes an inductor coil and a magnet.

[0055] For example, Figure 2 As shown, the inductor 111 of the embodiment of the present invention is an inductor coil L2, which is directly opposite to the magnet of the turbine.

[0056] The electric signal amplifying module 12 has an input end connected to the electric signal acquiring module 11 , and an output end connected to an input end of the square wave generating module 13 .

[0057] Furthermore, the electrical signal amplifying module 12 includes: a first resistor 121 , a second resistor 122 , and a first operational amplifier 123 .

[0058] Furthermore, one end of the first resistor 121 is connected to one end of the second resistor 122 and the inverting input end of the first operational amplifier 123 , and the other end of the first resistor 121 is connected to the output end of the electrical signal acquisition module 11 .

[0059] For example, Figure 2 As shown, the first resistor 121 in the embodiment of the present invention is R17.

[0060] Furthermore, one end of the second resistor 122 is connected to one end of the first resistor 121 and the inverting input end of the first operational amplifier 123 , and the other end of the second resistor 122 is connected to the output end of the first operational amplifier 123 and the input end of the square wave generating module 13 .

[0061] For example, Figure 2As shown, the second resistor 122 of the embodiment of the present invention is R14.

[0062] Furthermore, the positive input end of the first operational amplifier 123 is connected to the input end of the electrical signal acquisition module 11, the reverse input end of the first operational amplifier 123 is connected to one end of the first resistor 121 and one end of the second resistor 122, and the output end of the first operational amplifier 123 is connected to the other end of the second resistor 122 and the input end of the square wave generation module 13.

[0063] For example, Figure 2 As shown, the first operational amplifier 123 of the embodiment of the present invention is U3.

[0064] The input end of the square wave generating module 13 is connected to the output end of the electric signal amplifying module 12 .

[0065] Furthermore, the square wave generating module 13 includes: a third resistor 131 , a fourth resistor 132 , and a second operational amplifier 133 .

[0066] Furthermore, one end of the third resistor 131 is connected to one end of the fourth resistor 132 , the positive input end of the second operational amplifier 133 , and the output end of the electrical signal amplification module 12 , and the other end of the third resistor 131 is connected to the output end of the electrical signal amplification module 12 .

[0067] For example, Figure 2 As shown, the third resistor 131 of the embodiment of the present invention is R15.

[0068] Furthermore, one end of the fourth resistor 132 is connected to one end of the third resistor 131 and the positive input end of the second operational amplifier 133 , and the other end of the fourth resistor 132 is connected to the output end of the second operational amplifier 133 .

[0069] For example, Figure 2 As shown, the fourth resistor 132 of the embodiment of the present invention is R13.

[0070] Furthermore, a positive input terminal of the second operational amplifier 133 is connected to one end of the third resistor 131 and one end of the fourth resistor 132 , and a negative input terminal of the second operational amplifier 133 is connected to an input terminal of the electrical signal acquisition module 11 .

[0071] For example, Figure 2 As shown, the second operational amplifier 133 of the embodiment of the present invention is U3.

[0072] For example, the first operational amplifier 123 and the second operational amplifier 133 of the embodiment of the present invention are the same operational amplifier, model SGM8522XS / TR.

[0073] Furthermore, the flow velocity acquisition circuit further includes: a filtering unit 14 .

[0074] Further, the filtering unit 14 includes any one of the following items or a combination thereof:

[0075] One end of the filter unit 14 is connected to the input end of the electrical signal acquisition module 11, and the other end is connected to the input end of the electrical signal acquisition module 11;

[0076] One end of the filter unit 14 is connected to the input end of the electrical signal acquisition module 11, and the other end is grounded;

[0077] One end of the filter unit 14 is connected to the input end of the electric signal amplification module 12, and the other end is grounded;

[0078] One end of the filter unit 14 is connected to the input end of the square wave generation module 13, and the other end is connected to the input end of the electrical signal acquisition module 11;

[0079] One end of the filter unit 14 is connected to the input end of the square wave generating module 13 , and the other end is grounded.

[0080] Specifically, when one end of the filtering unit 14 is connected to the input end of the electric signal amplifying module 12 and the other end is connected to the input end of the electric signal acquiring module 11 , the electric signal input to the first operational amplifier 123 is more stable and has less burr interference.

[0081] Specifically, when one end of the filtering unit 14 is connected to the power input end of the first operational amplifier 123 in the electrical signal amplifying module 12 and the other end is grounded, it is power filtering to improve the anti-interference performance of the circuit.

[0082] Specifically, when one end of the filtering unit 14 is connected to the input end of the square wave generating module 13 and the other end is connected to the input end of the electrical signal acquiring module 11 , the electrical signal input to the second operational amplifier 133 is more stable and has less burr interference.

[0083] Specifically, when one end of the filtering unit 14 is connected to the power input end of the second operational amplifier 133 in the square wave generating module 13 and the other end is grounded, it is power supply filtering, so that the anti-interference performance of the circuit is improved.

[0084] For example, Figure 2 As shown, the filter unit 14 of the embodiment of the present invention is: C32; R11, C30, R12; C33, C34.

[0085] From the above description, it can be seen that the present invention achieves the technical effect of collecting the flow velocity of the refueling pipeline.

[0086] According to an embodiment of the present invention, a refueling metering circuit 2 is provided, comprising:

[0087] Flow rate acquisition circuit 1;

[0088] Data transmission circuit 21.

[0089] Furthermore, the refueling metering circuit further includes any one of the following items or a combination thereof:

[0090] Sensor 22 , display circuit 23 , storage circuit 24 , power circuit 25 , key circuit 26 , clock circuit 27 .

[0091] According to an embodiment of the present invention, there is provided a refueling meter, comprising:

[0092] Fuel metering circuit 2.

[0093] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, and optionally, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0094] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A flow velocity acquisition circuit, characterized in that: include: An electric signal acquisition module cooperates with the turbine to generate a disturbance electric signal under the interference of the turbine rotation, and the output end of the electric signal acquisition module is connected to the input end of the electric signal amplification module; The electrical signal amplifying module has an input end connected to the electrical signal acquiring module, and an output end connected to the input end of the square wave generating module; The square wave generating module, an input end of which is connected to the output end of the electric signal amplifying module; The electrical signal acquisition module comprises: An inductor, wherein the input end and the output end of the inductor are connected to the input end of the electric signal amplification module, and the input end of the inductor is connected to the input end of the square wave generation module; The turbine is arranged within the magnetic field generated by the inductor; The inductor includes an inductor coil and a magnet.

2. The flow velocity acquisition circuit according to claim 1, characterized in that: The electric signal amplification module includes: a first resistor, a second resistor, and a first operational amplifier; and One end of the first resistor is connected to one end of the second resistor and the inverting input end of the first operational amplifier, and the other end of the first resistor is connected to the output end of the electrical signal acquisition module; One end of the second resistor is connected to one end of the first resistor and the inverting input end of the first operational amplifier, and the other end of the second resistor is connected to the output end of the first operational amplifier and the input end of the square wave generating module; The positive input terminal of the first operational amplifier is connected to the input terminal of the electrical signal acquisition module, the reverse input terminal of the first operational amplifier is connected to one end of the first resistor and one end of the second resistor, and the output terminal of the first operational amplifier is connected to the other end of the second resistor and the input terminal of the square wave generation module.

3. The flow velocity acquisition circuit according to claim 1, characterized in that: The square wave generating module comprises: a third resistor, a fourth resistor, and a second operational amplifier; and One end of the third resistor is connected to one end of the fourth resistor, the positive input end of the second operational amplifier, and the output end of the electrical signal amplification module, and the other end of the third resistor is connected to the output end of the electrical signal amplification module; One end of the fourth resistor is connected to one end of the third resistor and the positive input end of the second operational amplifier, and the other end of the fourth resistor is connected to the output end of the second operational amplifier; The positive input terminal of the second operational amplifier is connected to one end of the third resistor and one end of the fourth resistor, and the negative input terminal of the second operational amplifier is connected to the input terminal of the electrical signal acquisition module.

4. The flow velocity acquisition circuit according to claim 1, characterized in that: The flow velocity acquisition circuit further includes: a filtering unit; and The filtering unit includes any one of the following items or a combination thereof: One end of the filtering unit is connected to the input end of the electrical signal amplifying module, and the other end is connected to the input end of the electrical signal acquiring module; One end of the filter unit is connected to the input end of the electrical signal acquisition module, and the other end is grounded; One end of the filter unit is connected to the input end of the electric signal amplification module, and the other end is grounded; One end of the filtering unit is connected to the input end of the square wave generating module, and the other end is connected to the input end of the electrical signal acquiring module; One end of the filter unit is connected to the input end of the square wave generating module, and the other end is grounded.

5. A refueling metering circuit, characterized in that: include: The flow velocity acquisition circuit according to any one of claims 1 to 4; The data transmission circuit is connected to the flow velocity collection circuit and transmits the square wave signal output by the flow velocity collection circuit.

6. The refueling metering circuit according to claim 5, characterized in that: The refueling metering circuit further includes any one of the following items or a combination thereof: Sensor circuit, display circuit, storage circuit, power circuit, key circuit, clock circuit.

7. A refueling meter, characterized in that: include: A refueling metering circuit as claimed in any one of claims 5 to 6.

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