CN211696770U - Dam safety monitoring device - Google Patents
Dam safety monitoring device Download PDFInfo
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- CN211696770U CN211696770U CN201922366545.5U CN201922366545U CN211696770U CN 211696770 U CN211696770 U CN 211696770U CN 201922366545 U CN201922366545 U CN 201922366545U CN 211696770 U CN211696770 U CN 211696770U
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- pass filter
- monitoring device
- safety monitoring
- circuit
- dam safety
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Abstract
The utility model belongs to the technical field of water conservancy intellectual detection system and specifically relates to a dam seepage flow measurement transmission device. Comprises an amplifying circuit and a filter connected with the amplifying circuit; the filter includes a high pass filter including a high pass filter circuit and a low pass filter including a low pass filter circuit selectively connected to the amplifying circuit. The utility model provides a dam safety monitoring device adopts multistage fortune to put and constitutes fourth order filter circuit, and the low frequency signal of filtering vibrating wire sensor provides frequency band within range signal smooth nature.
Description
Technical Field
The utility model belongs to the technical field of water conservancy intellectual detection system and specifically relates to a dam safety monitoring device.
Background
In the application of dam safety monitoring, the water level and the water seepage of a dam are monitored through sine signals.
Through the test and measurement of the single-coil vibration wire type sensor, such as a vibration wire type osmometer, a vibration wire type joint meter, a vibration wire type strain gauge, a vibration wire type steel bar meter and other sensors, the measured physical quantity has the resonance frequency of the vibration wire sensor, and other physical quantities can be calculated according to the measured resonance frequency. For example, the pressure of the osmometer, and then the water level height of the osmometer can be measured by calculating the corresponding water level value according to the pressure.
After being excited, the vibrating wire sensor can generate 500 uV-10 mV quickly attenuated sine wave signals, the signal intensity is weak, the signals are easy to be interfered to generate distortion, and the small signals are accurately amplified for measurement by a processor.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems, the utility model provides a vibrating wire signal acquisition of a dam safety monitoring data automatic acquisition device based on a multi-order Butterworth filter,
the utility model discloses a realize like this:
a dam safety monitoring device comprises an amplifying circuit and a filter connected with the amplifying circuit; the filter includes a high pass filter including a high pass filter circuit and a low pass filter including a low pass filter circuit selectively connected to the amplifying circuit.
Further, the amplifying circuit includes two inverting amplifying circuits connected in series.
Further, the high pass filter comprises two second order butterworth filters in series, namely a first second order butterworth filter and a second order butterworth filter.
Furthermore, a capacitor connected in series and a resistor connected to the ground are connected between the first second-order Butterworth filter and the second-order Butterworth filter.
Further, the second order butterworth filter includes an operational amplifier and at least two capacitors connected in series with a resistor connected to an inverting input of the operational amplifier and a non-inverting input.
Furthermore, the second-order Butterworth filter also comprises a resistor connected with the inverting input end and the output end; the circuit also comprises a resistor connected with the non-inverting input end.
Further, the low-pass filter circuit comprises at least two butterworth low-pass filters connected in series.
Further, the butterworth low pass filter includes a low pass filter circuit including an operational amplifier.
Furthermore, the inverting input end of the operational amplifier is connected with a capacitor, and the non-inverting input end of the operational amplifier is connected with a capacitor connected in series.
Further, a capacitor is connected in parallel between the inverting input end and the output end; and the positive phase input end and the output end are connected with a capacitor in parallel.
The beneficial effect of above-mentioned scheme:
the utility model provides a dam safety monitoring device adopts multistage fortune to put and constitutes fourth order filter circuit, and the low frequency signal of filtering vibrating wire sensor provides frequency band within range signal smooth nature.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a circuit diagram of an amplifying circuit provided by the present invention;
fig. 2 is a circuit diagram of a high-pass filter circuit provided by the present invention;
fig. 3 is a simplified circuit diagram of a high-pass filter circuit provided by the present invention;
fig. 4 is a circuit diagram of a low-pass filter circuit provided by the present invention;
fig. 5 is a simplified circuit diagram of a low-pass filter circuit provided by the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model provides a dam safety monitoring device, dam safety monitoring data automatic acquisition device's string signal collection shakes based on multistage Butterworth wave filter.
The dam safety monitoring device provided by the embodiment comprises an amplifying circuit, and a high-pass filter and a low-pass filter which are selectively connected with the amplifying circuit, wherein the high-pass filter and the high-pass filter are respectively provided with a high-pass filter circuit and a low-pass filter circuit.
The high-pass filter circuit is used for realizing a filter circuit which passes high-frequency or alternating-current components in signals and inhibits low-frequency or direct-current components.
The low-pass filter circuit is used for realizing a filter which passes low-frequency or direct-current components in a signal and inhibits high-frequency components or interference and noise.
In this embodiment, the high-pass filter circuit and the low-pass filter circuit mainly implement low-frequency and high-frequency components in the signal.
In the embodiment, the amplifying circuit amplifies weak signals after the sensor is excited, and because the field vibrating wire sensor is long in wiring and may introduce some interference, the pre-amplifying circuit adopts a reverse amplifying circuit formed by an operational amplifier, and compared with a homodromous amplifying circuit formed by the operational amplifier, the input impedance of the reverse amplifier is lower, so that the absorption of interference signals is facilitated.
In the present embodiment, the amplifying circuit includes at least two operational amplifiers.
Referring to fig. 2 and 3, the high-pass filter circuit provided in this embodiment includes a two-stage second-order butterworth filter cascade connection mode, so as to implement a fourth-order butterworth high-pass filter.
In this embodiment, the second-order butterworth filters respectively constitute a first second-order butterworth filter circuit and a second-order butterworth filter circuit. The first second-order Butterworth filter circuit and the second-order Butterworth filter circuit have the same circuit structure.
In the present embodiment, an operational amplifier and a resistor Ra connected to the inverting input terminal of the operational amplifier and at least capacitors C2 and C1 connected to the non-inverting input terminal are included.
The circuit also comprises a capacitor Rb which is connected with the output end and the inverting input end of the operational amplifier in parallel.
And the capacitor R1 is connected in parallel with the output end and the non-inverting input end of the operational amplifier.
Also included is a resistor R2 connected to ground with capacitors C2 and C1.
The Butterworth filter circuit has the following formula:
3dB point frequency:
magnification:
q value of the high-pass filter in the present embodiment:
substituting the resistance-capacitance parameters into the formula 3 to obtain: fl-408.3 Hz and Q-1.
Referring to fig. 4, the low pass filter provided in the present embodiment includes a low pass filter circuit.
In this embodiment, the low-pass filter circuit includes a first operational amplifier circuit and a second operational amplifier circuit connected to each other.
Referring to fig. 5, the first operational amplifier circuit and the second operational amplifier circuit include an operational amplifier in the present embodiment.
In this embodiment, the inverting input terminal of the operational amplifier is connected with a resistor Ra, the non-inverting input terminal of the operational amplifier is connected with R1 and R2 which are connected in series, a resistor Rb and a capacitor C3 are connected in parallel between the output terminal and the inverting input terminal, and a capacitor C1 is connected in parallel between the output terminal and the non-inverting input terminal.
Also included is C2 connected to ground in parallel with resistor R1 and resistor R2.
Q value of the low-pass filter:
calculated, fh is 6000Hz and Q is 1.
In the embodiment, the processor can measure the vibrating wire signals of the vibrating wire sensor at 400-6000Hz through the high-pass filter circuit and the low-pass filter circuit.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A dam safety monitoring device is characterized by comprising an amplifying circuit and a filter connected with the amplifying circuit; the filter includes a high pass filter including a high pass filter circuit and a low pass filter including a low pass filter circuit selectively connected to the amplifying circuit.
2. The dam safety monitoring device according to claim 1, wherein the amplifying circuit comprises two inverting amplifying circuits connected in series.
3. Dam safety monitoring device according to claim 1, wherein the high pass filter comprises two second order Butterworth filters in series, a first second order Butterworth filter and a second order Butterworth filter.
4. The dam safety monitoring device of claim 3, wherein a capacitor in series and a resistor to ground are connected between the first second order Butterworth filter and the second order Butterworth filter.
5. The dam safety monitoring device of claim 4, wherein the second order Butterworth filter comprises an operational amplifier and at least two capacitors connected in series with a resistor connected to an inverting input of the operational amplifier and a non-inverting input.
6. The dam safety monitoring device of claim 5, wherein the second order Butterworth filter further comprises a resistor connected to the inverting input and output; the circuit also comprises a resistor connected with the non-inverting input end.
7. Dam safety monitoring device according to claim 2, wherein the low-pass filter circuit comprises at least two Butterworth low-pass filters connected in series.
8. The dam safety monitoring device of claim 7, wherein the Butterworth low pass filter comprises a low pass filter circuit including an operational amplifier.
9. The dam safety monitoring device according to claim 8, wherein the inverting input terminal of the operational amplifier comprises a capacitor connected thereto, and the non-inverting input terminal of the operational amplifier is connected with a capacitor connected in series.
10. The dam safety monitoring device according to claim 9, wherein a capacitor is connected in parallel between the inverting input terminal and the output terminal; and the positive phase input end and the output end are connected with a capacitor in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922366545.5U CN211696770U (en) | 2019-12-25 | 2019-12-25 | Dam safety monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922366545.5U CN211696770U (en) | 2019-12-25 | 2019-12-25 | Dam safety monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211696770U true CN211696770U (en) | 2020-10-16 |
Family
ID=72794505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922366545.5U Active CN211696770U (en) | 2019-12-25 | 2019-12-25 | Dam safety monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211696770U (en) |
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2019
- 2019-12-25 CN CN201922366545.5U patent/CN211696770U/en active Active
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Address after: 518000 601, Building 5, Software Park, Keji Middle 2nd Road, High-tech Zone, Nanshan District, Shenzhen, Guangdong Province Patentee after: Dongshen Zhishui Technology (Shenzhen) Co.,Ltd. Address before: 518000 Room 601, building 5, software park, kekezhong 2nd Road, Nanshan District, Shenzhen, Guangdong Patentee before: SHENZHEN DONGSHEN ELECTRONIC Co.,Ltd. |
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