CN215984700U - Anti-interference gas turbine flowmeter - Google Patents
Anti-interference gas turbine flowmeter Download PDFInfo
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- CN215984700U CN215984700U CN202122466551.5U CN202122466551U CN215984700U CN 215984700 U CN215984700 U CN 215984700U CN 202122466551 U CN202122466551 U CN 202122466551U CN 215984700 U CN215984700 U CN 215984700U
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Abstract
The utility model discloses an anti-interference gas turbine flowmeter, which comprises a flow sensor, a signal conditioning unit and a controller, wherein the signal conditioning unit comprises an amplifying and noise reducing circuit and an amplitude stabilizing circuit, the input end of the amplifying and noise reducing circuit is connected with the signal output end of the flow sensor, and the output end of the amplifying and noise reducing circuit is connected with the input end of the amplitude stabilizing circuit.
Description
Technical Field
The utility model relates to the technical field of gas flowmeters, in particular to an anti-interference gas turbine flowmeter.
Background
Gas flow meters are precision instruments used to measure the cumulative flow of gas in a pipeline. There are three main ways of flow measurement: the positive displacement flowmeter such as a diaphragm gas meter, a Roots flowmeter and the like accurately measures and settles the gas through the rotary volume; a velocity gas flow meter for measuring a gas volume by a gas flow rate; the gas measurement is performed by differential pressure. In the metering process of the gas flowmeter, mechanical disturbance of a gas impact flowmeter pipeline can often occur, so that peak noise exists in flow sensor detection, signal output is unstable, and the metering precision of the gas flowmeter is seriously influenced.
The present invention provides a new solution to this problem.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention is directed to a gas turbine flowmeter with interference resistance.
The technical scheme for solving the problem is as follows: the utility model provides an anti-interference type gas turbine flowmeter, includes flow sensor, signal conditioning unit and controller, signal conditioning unit falls circuit and amplitude stabilizing circuit including the amplification, the input that the circuit of making an uproar falls in the amplification is connected flow sensor's signal output part, the output that the circuit of making an uproar falls in the amplification is connected amplitude stabilizing circuit's input, amplitude stabilizing circuit's output is connected the controller.
Further, the amplification noise reduction circuit comprises an operational amplifier U1 and a operational amplifier U2, an inverting input terminal of an operational amplifier U1 is connected with a signal output terminal of the flow sensor through a resistor R1 and is grounded through a capacitor C1, a non-inverting input terminal of an operational amplifier U1 is grounded, an output terminal of an operational amplifier U1 is connected with one end of a resistor R3 and the inverting input terminal of the operational amplifier U2 through an inductor L1 and a capacitor C3 which are connected in parallel, the other end of the resistor R3 is grounded with the non-inverting input terminal of the operational amplifier U2, and an output terminal of an operational amplifier U2 is connected with the inverting input terminal of the operational amplifier U1 through a resistor R2 and a capacitor C2 which are connected in parallel.
Further, the amplitude stabilizing circuit comprises a MOS transistor Q1, the drain of the MOS transistor Q1 is connected with the output end of the operational amplifier U2 through a resistor R4, the drain of the MOS transistor Q1 is connected with the gate of the MOS transistor Q1, one end of a capacitor C4 and the cathode of a voltage stabilizing diode DZ1 through a resistor R5, the other end of the capacitor C4 and the anode of the voltage stabilizing diode DZ1 are grounded in parallel, and the source of the MOS transistor Q1 is connected with the controller and grounded through a resistor R6.
Through the technical scheme, the utility model has the beneficial effects that: according to the utility model, the signal conditioning unit is arranged to process the detection signal of the flow sensor, so that the mechanical spike noise and surge noise interference are effectively inhibited, the influence of mechanical disturbance on the flow detection signal caused by the impact of gas on the flowmeter pipeline is avoided, the precision and anti-interference of the detection signal are ensured, and the metering precision of the gas flowmeter is greatly improved.
Drawings
Fig. 1 is a schematic diagram of a signal conditioning unit of the present invention.
Detailed Description
The foregoing and other technical and scientific aspects, features and utilities of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings of fig. 1. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The utility model provides an anti-interference type gas turbine flowmeter, includes flow sensor, signal conditioning unit and controller, wherein, signal conditioning unit falls circuit and amplitude stabilizing circuit including the amplification, the input of circuit of falling the noise is connected in the amplification flow sensor's signal output part, the output of circuit of falling the noise is connected in the amplification amplitude stabilizing circuit's input, amplitude stabilizing circuit's output is connected the controller.
The amplifying and noise reducing circuit comprises operational amplifiers U1 and U2, the inverting input end of an operational amplifier U1 is connected with the signal output end of the flow sensor through a resistor R1 and is grounded through a capacitor C1, the non-inverting input end of an operational amplifier U1 is grounded, the output end of an operational amplifier U1 is connected with one end of a resistor R3 and the inverting input end of the operational amplifier U2 through an inductor L1 and a capacitor C3 which are connected in parallel, the other end of the resistor R3 is grounded with the non-inverting input end of the operational amplifier U2, and the output end of the operational amplifier U2 is connected with the inverting input end of the operational amplifier U1 through a resistor R2 and a capacitor C2 which are connected in parallel.
The amplitude stabilizing circuit comprises a MOS tube Q1, the drain electrode of the MOS tube Q1 is connected with the output end of an operational amplifier U2 through a resistor R4, the drain electrode of the MOS tube Q1 is connected with the grid electrode of the MOS tube Q1, one end of a capacitor C4 and the cathode of a voltage stabilizing diode DZ1 through a resistor R5, the other end of the capacitor C4 and the anode of the voltage stabilizing diode DZ1 are grounded in parallel, and the source electrode of the MOS tube Q1 is connected with the controller and grounded through a resistor R6.
When the gas flowmeter is used specifically, the flow sensor detects the fluid flow in the pipeline of the gas flowmeter, converts the fluid flow into an electric signal and outputs the electric signal, and firstly, an amplifying and noise reducing circuit is adopted to process a detection signal in order to avoid the influence of interference on the detection signal on the metering precision. The resistor R1 and the capacitor C1 form RC filtering to preliminarily suppress mechanical spike noise in the detection signal, and then the mechanical spike noise is sent into the operational amplifiers U1 and U2 to be amplified step by step, so that the intensity of the overhaul signal is rapidly improved. In the operational amplifier process, an RLC trap network is formed by the inductor L1, the capacitor C3 and the resistor R3 to filter the surge noise frequency in the detection signal, so that the harmful noise in the detection signal is effectively suppressed; and closed loop feedback compensation is added in the operational amplifier process, and the resistance-capacitance feedback compensation formed by the resistor R2 and the capacitor C2 is utilized, so that the system error is effectively avoided, and the output precision of the detection signal is ensured.
The amplitude stabilizing circuit is used for carrying out amplitude stabilizing adjustment on an output signal of the amplification noise reduction circuit, wherein an MOS tube Q1 is used as a main adjusting tube to process a detection signal, a voltage stabilizing diode DZ1 is used for carrying out reference on grid conduction voltage of an MOS tube Q1, a capacitor C4 is used for buffering and stabilizing a grid signal of the MOS tube Q1, the stability of the amplitude of an output signal of a source electrode of the MOS tube Q1 is greatly guaranteed, and the accuracy of the detection signal processing of the controller is improved.
In summary, the signal conditioning unit is arranged to process the detection signal of the flow sensor, so that the mechanical spike noise and surge noise interference are effectively suppressed, the influence of mechanical disturbance on the flow detection signal caused by the impact of gas on the flowmeter pipeline is avoided, the precision and anti-interference of the detection signal are ensured, and the metering precision of the gas flowmeter is greatly improved.
While the utility model has been described in further detail with reference to specific embodiments thereof, it is not intended that the utility model be limited to the specific embodiments thereof; for those skilled in the art to which the present invention pertains and related technologies, the extension, operation method and data replacement should fall within the protection scope of the present invention based on the technical solution of the present invention.
Claims (3)
1. The utility model provides a gaseous turbine flowmeter of anti-interference type, includes flow sensor, signal conditioning unit and controller, its characterized in that: the signal conditioning unit comprises an amplification noise reduction circuit and an amplitude stabilizing circuit, the input end of the amplification noise reduction circuit is connected with the signal output end of the flow sensor, the output end of the amplification noise reduction circuit is connected with the input end of the amplitude stabilizing circuit, and the output end of the amplitude stabilizing circuit is connected with the controller.
2. The tamper resistant gas turbine flowmeter of claim 1, wherein: the amplifying and noise reducing circuit comprises operational amplifiers U1 and U2, an inverting input end of an operational amplifier U1 is connected with a signal output end of the flow sensor through a resistor R1 and is grounded through a capacitor C1, a non-inverting input end of an operational amplifier U1 is grounded, an output end of an operational amplifier U1 is connected with one end of a resistor R3 and the inverting input end of the operational amplifier U2 through an inductor L1 and a capacitor C3 which are connected in parallel, the other end of the resistor R3 is grounded with the non-inverting input end of the operational amplifier U2, and an output end of the operational amplifier U2 is connected with the inverting input end of the operational amplifier U1 through a resistor R2 and a capacitor C2 which are connected in parallel.
3. The tamper resistant gas turbine flowmeter of claim 2, wherein: the amplitude stabilizing circuit comprises a MOS tube Q1, the drain electrode of the MOS tube Q1 is connected with the output end of an operational amplifier U2 through a resistor R4, the drain electrode of the MOS tube Q1 is connected with the grid electrode of the MOS tube Q1, one end of a capacitor C4 and the cathode of a voltage stabilizing diode DZ1 through a resistor R5, the other end of the capacitor C4 and the anode of the voltage stabilizing diode DZ1 are grounded in parallel, and the source electrode of the MOS tube Q1 is connected with the controller and grounded through a resistor R6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122466551.5U CN215984700U (en) | 2021-10-13 | 2021-10-13 | Anti-interference gas turbine flowmeter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122466551.5U CN215984700U (en) | 2021-10-13 | 2021-10-13 | Anti-interference gas turbine flowmeter |
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| CN215984700U true CN215984700U (en) | 2022-03-08 |
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| CN202122466551.5U Active CN215984700U (en) | 2021-10-13 | 2021-10-13 | Anti-interference gas turbine flowmeter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115016569A (en) * | 2022-06-21 | 2022-09-06 | 中维化纤股份有限公司 | Nylon polymerization cauldron temperature control system |
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2021
- 2021-10-13 CN CN202122466551.5U patent/CN215984700U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115016569A (en) * | 2022-06-21 | 2022-09-06 | 中维化纤股份有限公司 | Nylon polymerization cauldron temperature control system |
| CN115016569B (en) * | 2022-06-21 | 2024-02-20 | 中维化纤股份有限公司 | Nylon polymerization reaction kettle temperature control system |
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