CN212432410U - Online installation detection device is pressed in area - Google Patents
Online installation detection device is pressed in area Download PDFInfo
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- CN212432410U CN212432410U CN202021683192.8U CN202021683192U CN212432410U CN 212432410 U CN212432410 U CN 212432410U CN 202021683192 U CN202021683192 U CN 202021683192U CN 212432410 U CN212432410 U CN 212432410U
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Abstract
The utility model discloses a pressure online installation detection device, including pressure sensor, pressure sensor's detected signal is sent into filter circuit and two fortune in proper order and is put feedback control circuit and handle, and two fortune are put feedback control circuit's output signal and are sent into the controller after the AD conversion, and the controller passes through data serial ports and connects the display screen, and filter circuit carries out noise reduction to pressure sensor's detected signal, eliminates external interference to very big limit, effectively guarantees pressure detection's accuracy; the dual operational amplifier feedback regulating circuit is designed to process the output signal of the filter circuit, eliminate the fluctuation influence of the detection signal caused by resonance, effectively improve the filtering quality and ensure the stable and reliable signal output; the device has high automation degree, the pressure detection result is accurate and effective, and a reliable auxiliary effect is provided for the online installation and detection operation under pressure.
Description
Technical Field
The utility model relates to a take area to press online installation technical field, especially relate to a take area to press online installation detection device.
Background
The problems that a boiler or an auxiliary engine system cannot be stopped in many measuring points in the industries of electric power, metallurgy and the like, and a flow measuring device is required to be additionally arranged so as to monitor the flow value or the flow velocity value of a medium. The utility model discloses a utility model patent of application number 2018209958217, patent name "area press on-line installation flow measuring device", its technical scheme adopts the sensor that has the sealing ring, and the sensor adopts multiple spot to get to press and inside high-low pressure lumen combination technique that adopts, can carry the average pressure of high low pressure to getting to press to chew, can carry out work such as trompil operation, flow measuring device installation to the pipeline of measurement station under the condition that the user does not stop the operation. However, the operation of the sensor is affected by the ambient temperature of the measuring point, which may cause interference to the detection and affect the accuracy of the detection result.
So the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
To the above situation, in order to overcome the defects of the prior art, an object of the present invention is to provide an online installation and detection device with pressure.
The technical scheme for solving the problem is as follows: the utility model provides a pressure on-line installation detection device, includes pressure sensor, and pressure sensor's detected signal sends into filter circuit and two fortune in proper order and puts feedback control circuit and handle, and two fortune send the controller into after the AD conversion of feedback control circuit's output signal, and the controller passes through data serial ports and connects the display screen.
Preferably, the filter circuit includes a resistor R1, a capacitor C1, a resistor R1, one end of a capacitor C1 connected to the signal output end of the pressure sensor, a drain of a MOS transistor Q1, a resistor R2, and one end of a capacitor C2, the other ends of the resistor R1 and the capacitor C1 are grounded in parallel, a gate of a MOS transistor Q1 is connected to the other end of the resistor R2 and a cathode of a zener diode DZ1, an anode of the zener diode DZ1 is grounded, a source of a MOS transistor Q1 is connected to one ends of capacitors C3 and C4 and is grounded through a resistor R3, the other ends of the capacitors C2 and C3 are connected to one end of an inductor L1 and the dual-operational amplifier feedback regulating circuit, and the other ends of the capacitor C4 and the inductor L1.
Preferably, the dual operational amplifier feedback regulation circuit comprises operational amplifiers U1 and U2, an inverting input terminal of the operational amplifier U1 is connected to the other end of the capacitor C2 through a resistor R4, a non-inverting input terminal of the operational amplifier U1 is grounded through a resistor R5, an output terminal of the operational amplifier U1 is connected to one ends of the resistors R6 and R9, the other end of the resistor R6 is connected to a non-inverting input terminal of the operational amplifier U2 and is grounded through a resistor R7, an inverting input terminal of the operational amplifier U2 is connected to an output terminal of the operational amplifier U2 through a capacitor C5, an output terminal of the operational amplifier U2 is connected to the other end of the capacitor C2 through a resistor R8, and the other end of the resistor R9 is grounded through a capacitor C6 and is connected to.
Preferably, the pressure sensor is the model MPX 2010.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the utility model adopts the filter circuit to reduce noise of the detection signal of the pressure sensor, thereby eliminating external interference to a great extent and effectively ensuring the accuracy of pressure detection;
2. the dual operational amplifier feedback regulating circuit is designed to process the output signal of the filter circuit, eliminate the fluctuation influence of the detection signal caused by resonance, effectively improve the filtering quality and ensure the stable and reliable signal output;
3. the device has high automation degree, the pressure detection result is accurate and effective, and a reliable auxiliary effect is provided for the online installation and detection operation under pressure.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The foregoing and other features, aspects and utilities of the present invention will be apparent from the following more particular description of the embodiments of the invention, as illustrated in the accompanying drawings and described in the accompanying drawings of which 1 is a part hereof. 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 a pressure on-line installation detection device, includes pressure sensor, and pressure sensor's detected signal sends into filter circuit and two fortune in proper order and puts feedback control circuit and handle, and two fortune send the controller into after the AD conversion of feedback control circuit's output signal, and the controller passes through data serial ports and connects the display screen.
The filter circuit comprises a resistor R1, a capacitor C1, a resistor R1 and a capacitor C1, wherein one end of the resistor R1 and one end of the capacitor C1 are connected with a signal output end of the pressure sensor, the drain electrode of a MOS tube Q1, one end of a resistor R2 and one end of a capacitor C2, the other ends of the resistor R1 and the capacitor C1 are grounded in parallel, the grid electrode of the MOS tube Q1 is connected with the other end of a resistor R2 and the cathode of a voltage stabilizing diode DZ1, the anode of the voltage stabilizing diode DZ1 is grounded, the source electrode of the MOS tube Q1 is connected with one ends of the capacitors C3 and C4 and is grounded through the resistor R3, the other ends of the capacitors C2 and C3 are connected with one end of an inductor L1.
The double operational amplifier feedback regulation circuit comprises operational amplifiers U1 and U2, wherein an inverting input end of an operational amplifier U1 is connected with the other end of a capacitor C2 through a resistor R4, a non-inverting input end of an operational amplifier U1 is grounded through a resistor R5, an output end of an operational amplifier U1 is connected with one ends of a resistor R6 and a resistor R9, the other end of the resistor R6 is connected with a non-inverting input end of an operational amplifier U2 and is grounded through a resistor R7, an inverting input end of an operational amplifier U2 is connected with an output end of an operational amplifier U2 through a capacitor C5, an output end of an operational amplifier U2 is connected with the other end of a capacitor C2 through a resistor R8, and the other end of a resistor R9 is grounded through a capacitor C6.
The utility model discloses when specifically using, pressure sensor chooses for use the model to be MPX2010, has automatic temperature compensation, and sensitivity is high. The detection signal of the pressure sensor is firstly sent to a filter circuit for noise reduction, wherein the resistor R1 and the capacitor C1 form RC low-pass filtering to eliminate high-frequency noise in the pressure detection signal. The RC-filtered signal is sent to an MOS transistor Q1 for amplification, and a voltage stabilizing diode DZ1 plays a reference role in the grid voltage of the MOS transistor Q1, so that the stability of signal amplification output is ensured. The output signal of the MOS tube Q1 is sent into a second-order LC filter formed by an inductor L1 and capacitors C4 and C5 for frequency selection, the frequency of the pressure detection signal is selected by utilizing the LC parallel resonance principle, and clutter segment signals are filtered, so that the external interference is eliminated to the maximum extent, and the accuracy of pressure detection is effectively ensured.
Because the resonance of the LC filter can cause the fluctuation of the detection signal, the output of the detection signal is unstable, and therefore, the double-operational-amplifier feedback adjusting circuit is designed to process the output signal of the filter circuit. The operational amplifier U1 reversely amplifies the output signal of the filter circuit, and the operational amplifier U2 performs depth feedback on the output signal of the operational amplifier U1 by using a voltage follower, so that the filtering quality is effectively improved, the signal output is stable and reliable, and finally the signal is sent into the A/D converter after being filtered by the RC. The A/D converter converts the output signal of the double operational amplifier feedback regulating circuit into digital quantity and then sends the digital quantity into the controller to calculate the pressure detection value, and the controller transmits the pressure detection value to the display screen in real time, so that the installation and detection personnel can conveniently check the pressure detection value. The device has high automation degree, the pressure detection result is accurate and effective, and a reliable auxiliary effect is provided for the online installation and detection operation under pressure.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (4)
1. The utility model provides an online installation detection device is pressed in area, includes pressure sensor, its characterized in that: the detection signal of the pressure sensor is sequentially sent to the filter circuit and the double-operational-amplifier feedback adjusting circuit for processing, the output signal of the double-operational-amplifier feedback adjusting circuit is sent to the controller after being subjected to A/D conversion, and the controller is connected with the display screen through the data serial port.
2. The online installation under pressure detection device of claim 1, characterized in that: the filter circuit comprises a resistor R1 and a capacitor C1, one end of the resistor R1 and one end of the capacitor C1 are connected with the signal output end of the pressure sensor, the drain electrode of the MOS tube Q1, one end of the resistor R2 and one end of the capacitor C2, the other ends of the resistor R1 and the capacitor C1 are grounded in parallel, the grid electrode of the MOS tube Q1 is connected with the other end of the resistor R2 and the cathode of the voltage stabilizing diode DZ1, the anode of the voltage stabilizing diode DZ1 is grounded, the source electrode of the MOS tube Q1 is connected with one ends of the capacitors C3 and C4 and is grounded through the resistor R3, the other ends of the capacitors C2 and C3 are connected with one end of the inductor L1 and the dual-operational amplifier feedback regulating circuit, and the other ends of the.
3. The live online installation detection device of claim 2, wherein: the dual operational amplifier feedback regulation circuit comprises operational amplifiers U1 and U2, wherein an inverting input end of an operational amplifier U1 is connected with the other end of a capacitor C2 through a resistor R4, a non-inverting input end of an operational amplifier U1 is grounded through a resistor R5, an output end of the operational amplifier U1 is connected with one ends of a resistor R6 and a resistor R9, the other end of the resistor R6 is connected with a non-inverting input end of an operational amplifier U2 and is grounded through a resistor R7, an inverting input end of the operational amplifier U2 is connected with an output end of an operational amplifier U2 through a capacitor C5, an output end of an operational amplifier U2 is connected with the other end of a capacitor C2 through a resistor R8, and the other end of a resistor R9 is grounded through a capacitor C6 and is.
4. The online installation under pressure detection device of claim 3, characterized in that: the pressure sensor is selected to be MPX 2010.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021683192.8U CN212432410U (en) | 2020-08-13 | 2020-08-13 | Online installation detection device is pressed in area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021683192.8U CN212432410U (en) | 2020-08-13 | 2020-08-13 | Online installation detection device is pressed in area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212432410U true CN212432410U (en) | 2021-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021683192.8U Active CN212432410U (en) | 2020-08-13 | 2020-08-13 | Online installation detection device is pressed in area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212432410U (en) |
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2020
- 2020-08-13 CN CN202021683192.8U patent/CN212432410U/en active Active
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