Telemetering terminal with vibrating wire interface
By integrating a vibrating wire interface and related circuits into the telemetry terminal, the integration problem between the telemetry terminal and the vibrating wire sensor was solved, enabling high-precision monitoring of parameters such as water level, water pressure, and seepage pressure, thus improving data accuracy and applicability.
Patent Information
- Application Number
- CN202520706690.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-04-15
AI Technical Summary
Existing telemetry terminals cannot efficiently integrate vibrating wire sensors, failing to meet their data acquisition and analysis needs and limiting their application in industries such as hydrology and water conservancy.
The telemetry terminal integrates a vibrating string interface, including a preamplifier circuit, a filter circuit, a vibration pickup circuit, a vibrating string circuit, and an excitation circuit. The excitation circuit sends an excitation signal to the vibrating string sensor, collects and processes the signal to calculate the vibration frequency value of the steel string, supports RS485 digital or analog interfaces, and optimizes the vibrating string signal processing capabilities.
It achieves efficient integration of telemetry terminal and vibrating wire sensor, improves measurement accuracy and applicability, provides more accurate monitoring data of parameters such as water level, water pressure, and seepage pressure, and supports engineering safety and water resource management.
Smart Images
Figure CN223940294U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of telemetry terminal technology, and more specifically, to a telemetry terminal with a vibrating wire interface. Background Technology
[0002] In hydrology, water conservancy, and water affairs industries, accurate monitoring of parameters such as water level, water pressure, head, and seepage pressure is crucial for ensuring project safety and water resource management. While submersible pressure level gauges are widely used in traditional environmental monitoring systems, they are susceptible to environmental factors, frequently experiencing data drift, accuracy degradation, and limited lifespan. Radar and ultrasonic level gauges, although highly accurate, require unobstructed views, limiting their application. These shortcomings have prompted the industry to continuously explore new monitoring technologies. Vibrating wire sensors stand out with their unique advantages. They utilize a taut metal string as a sensing element, accurately reflecting the tension by measuring changes in the string's vibration frequency, and then calculating the change in the measured physical quantity. This sensor is not only highly accurate and less affected by environmental interference, but also has low power consumption, making it suitable for various complex environments. However, most current telemetry terminals only support RS485 digital or analog interfaces, making it difficult to efficiently adapt to the data acquisition and analysis needs of vibrating wire sensors. Therefore, how to effectively integrate vibrating wire sensors with existing telemetry terminals has become a critical issue that urgently needs to be addressed. Utility Model Content
[0003] To overcome the above deficiencies, this utility model provides a telemetry terminal with a vibrating wire interface to solve the aforementioned problems.
[0004] This utility model is implemented as follows:
[0005] A telemetry terminal with a vibrating wire interface includes a telemetry terminal body, which internally houses a main control circuit. A vibrating wire interface is located on the top of the telemetry terminal body. The main control circuit includes a preamplifier circuit, a filter circuit, a vibration pickup circuit, a vibrating wire circuit, a microcontroller, and an excitation circuit. The vibrating wire interface is connected to the input terminal of the preamplifier circuit. The output terminal of the preamplifier circuit is connected to the input terminal of the filter circuit. The output terminal of the filter circuit is connected to the input terminal of the vibration pickup circuit. The output terminal of the vibration pickup circuit is connected to the input terminal of the vibrating wire circuit. The input terminal of the vibrating wire circuit is connected to the input terminal of the microcontroller. The output terminal of the microcontroller is connected to the input terminal of the excitation circuit. The output terminal of the excitation circuit is connected to the vibrating wire interface.
[0006] In an embodiment of this utility model, the output terminal of the filter circuit is connected to the SEN terminal of the vibration pickup circuit. One end of the SEN terminal of the vibration pickup circuit is connected to pin 1 of the vibrating string circuit through a coil Coil, and the other end is connected to pin 2 of the vibrating string circuit. Pin 3 of the vibrating string circuit is grounded through a resistor RT.
[0007] In an embodiment of this utility model, pin 11 of the vibrating string circuit is connected to the external power supply VCC, pins 9 and 10 of the vibrating string circuit are grounded, pins 5 and 6 of the vibrating string circuit are connected to pins 3 and 2 of the microcontroller, pin 22 of the vibrating string circuit is grounded, pin 19 of the vibrating string circuit is grounded through switch S01, pin 17 of the vibrating string circuit is connected to the sensor excitation power supply VSEN, pins 16 and 12 of the vibrating string circuit are grounded, and pin 13 of the vibrating string circuit is connected to the communication interface RS232 / RS485Port.
[0008] In an embodiment of this utility model, the excitation circuit includes a gate-driven optocoupler, model number HCPL-3120.
[0009] In an embodiment of this utility model, pin 2 of the gate-driven optocoupler is connected to pin 4 of the microcontroller, pin 3 of the gate-driven optocoupler is grounded through resistor R5, pin 8 of the gate-driven optocoupler is connected to inductor L1, the other end of inductor L1 is connected to a 15V voltage, capacitors C3 and C4 are connected in parallel across the two ends of inductor L1, the other end of capacitor C3 is connected to signal ground SGND, and the other end of capacitor C4 is grounded through resistor R4.
[0010] The beneficial effects of this utility model are as follows: This device integrates a vibrating wire interface into the existing telemetry terminal, and integrates a corresponding vibration pickup circuit, vibrating wire circuit, and excitation circuit into the main control circuit. In use, the excitation circuit sends an excitation signal to the vibrating wire sensor, causing it to vibrate and acquire signals. After processing the acquired signals for clutter, the vibrating wire circuit performs quality assessment and adjustment calculations on the acquired sensor signals to calculate the vibration frequency value of the sensor's steel wire. This telemetry terminal not only retains the existing RS485 digital or analog interface, but the added vibrating wire interface expands the application range. The vibrating wire sensor itself has the characteristics of high-precision measurement, and this utility model further improves the measurement accuracy by optimizing the processing capability of the vibrating wire signal. This enables the telemetry terminal to provide more accurate data when monitoring parameters such as water level, water pressure, and seepage pressure, which helps in the accurate decision-making of engineering safety and water resource management. Attached Figure Description
[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0012] Figure 1 A schematic diagram of the overall structure provided for the embodiments of this utility model;
[0013] Figure 2 An overall communication block diagram provided for embodiments of this utility model;
[0014] Figure 3 Circuit diagrams of the vibration pickup circuit and vibrating string circuit provided for embodiments of this utility model;
[0015] Figure 4 A circuit diagram of the excitation circuit provided for an embodiment of this utility model;
[0016] Figure 5 The circuit schematic diagram of the microcontroller provided for the embodiments of this utility model.
[0017] In the diagram: 10. Telemetry terminal body; 11. Vibrating string interface; 12. Preamplifier circuit; 13. Filter circuit; 14. Vibration pickup circuit; 15. Vibrating string circuit; 16. Microcontroller; 17. Excitation circuit. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0020] like Figure 1-2As shown, this utility model provides a telemetry terminal with a vibrating wire interface, including a telemetry terminal body 10, which internally houses a main control circuit. A vibrating wire interface 11 is located on the top of the telemetry terminal body 10. The main control circuit includes a preamplifier circuit 12, a filter circuit 13, a vibration pickup circuit 14, a vibrating wire circuit 15, a microcontroller 16, and an excitation circuit 17. The vibrating wire interface 11 is connected to the input terminal of the preamplifier circuit 12. The output terminal of the preamplifier circuit 12 is connected to the input terminal of the filter circuit 13. The output terminal of the filter circuit 13 is connected to the input terminal of the vibration pickup circuit 14. The output terminal of the vibration pickup circuit 14 is connected to the input terminal of the vibrating wire circuit 15. The vibrating wire circuit 15... The input terminal is connected to the input terminal of the microcontroller 16, the output terminal of the microcontroller 16 is connected to the input terminal of the excitation circuit 17, and the output terminal of the excitation circuit 17 is connected to the vibrating wire interface 11. The measurement process of the vibrating wire sensor includes excitation, sampling, and calculation. That is, the microcontroller 16 controls the excitation circuit 17 to excite the vibrating wire sensor. The excitation signal is sent to the vibrating wire sensor using a high-voltage pulse or low-voltage sweep frequency method, causing the sensor steel wire to vibrate. The collected vibrating wire signal is processed by the preamplifier, filter circuit 13, and vibration pickup circuit 14, and finally comes to the vibrating wire circuit 15 for quality assessment and adjustment calculation to calculate the vibration frequency value of the vibrating wire sensor steel wire.
[0021] In this embodiment, the microcontroller is preferably an STM32, i.e. Figure 5 This is the circuit schematic of the STM32 main chip.
[0022] like Figure 3 and Figure 5 As shown, the output terminal of the filter circuit 13 is connected to the SEN terminal of the vibration pickup circuit 14. The chip model of the vibration pickup circuit 14 is VM511. One end of the SEN terminal of the vibration pickup circuit 14 is connected to pin 1 of the vibrating string circuit 15 through the coil Coil, and the other end is connected to pin 2 of the vibrating string circuit 15. Pin 3 of the vibrating string circuit 15 is grounded through the resistor RT. The main function of the vibration pickup circuit 14 is to further amplify, filter, and shape the processed vibrating string signal, and finally shape the response signal into a signal form that is convenient for subsequent circuits or microprocessors to read and process.
[0023] Furthermore, pin 11 of the vibrating string circuit 15 is connected to the external power supply VCC, pins 9 and 10 of the vibrating string circuit 15 are grounded, pins 5 and 6 of the vibrating string circuit 15 are connected to pins 3 and 2 of the STM32 main chip respectively, pin 22 of the vibrating string circuit 15 is grounded, pin 19 of the vibrating string circuit 15 is grounded through switch S01, pin 17 of the vibrating string circuit 15 is connected to the sensor excitation power supply VSEN, pins 16 and 12 of the vibrating string circuit 15 are grounded, and pin 13 of the vibrating string circuit 15 is connected to the communication interface RS232 / RS485Port.
[0024] like Figure 4 As shown, the excitation circuit 17 includes a gate-driven optocoupler, model HCPL-3120. Pin 2 of the gate-driven optocoupler is connected to pin 4 of the STM32 main chip. Pin 3 of the gate-driven optocoupler is grounded through resistor R5. Pin 8 of the gate-driven optocoupler is connected to inductor L1. The other end of inductor L1 is connected to a 15V voltage. Capacitors C3 and C4 are connected in parallel across inductor L1. The other end of capacitor C3 is connected to signal ground SGND, and the other end of capacitor C4 is grounded through resistor R4. The excitation circuit has two Functions: First, it performs a voltage boost function (essentially increasing the drive current). The voltage output from the microcontroller's I / O port in the main control circuit is low, which is insufficient to excite the vibrating wire sensor even under frequency sweep (debugging and verification: the vibrating wire sensor can only start oscillating when the frequency sweep voltage is greater than 5V). Therefore, the excitation circuit 17 is needed to amplify the microcontroller's voltage. Second, it provides isolation. The gate-driven optocoupler selected in the circuit integrates a light-emitting diode and a photodetector unit to realize the conversion of electrical signal to optical signal and back to electrical signal, thus providing isolation and reducing interference between circuits.
[0025] Specifically, the working principle of this telemetry terminal with a vibrating wire interface is as follows: The vibrating wire sensor is connected to the vibrating wire interface 11. Upon startup, the STM32 main chip controls the excitation circuit 17 to boost the voltage, sending an excitation signal to the sensor via a high-voltage pulse method. This causes the steel wire of the vibrating wire sensor to vibrate and acquire the signal. The acquired signal is then processed by the preamplifier circuit 12 and the filter circuit 13 to remove noise generated during the acquisition process. The signal is then further processed by the vibration pickup circuit 14. In the vibrating wire circuit 15, the acquired sensor signal undergoes quality assessment and adjustment calculations to calculate the sensor's steel wire... The string vibration frequency value is thus obtained, completing the acquisition of this signal. By adding a vibrating string interface 11 and its corresponding vibrating string circuit 15 to the telemetry terminal, the problem that existing telemetry terminals only support RS485 digital or analog interfaces and cannot be adapted to vibrating string sensors is solved. This telemetry terminal with vibrating string interface 11 not only retains the RS485 digital interface, but also optimizes the processing capability of vibrating string signals, ensuring that various parameters can be perceived more accurately and stably in the Internet of Things telemetry system, providing strong support for online monitoring and early warning of water areas and engineering environments, and having profound significance for upper-level software systems and data development and application.
[0026] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.
Claims
1. A telemetry terminal with a vibrating wire interface, comprising a telemetry terminal body (10) having a main control circuit internally, characterized in that, The telemetry terminal body (10) has a vibrating wire interface (11) on its top. The main control circuit is equipped with a preamplifier circuit (12), a filter circuit (13), a vibration pickup circuit (14), a vibrating wire circuit (15), a microcontroller (16), and an excitation circuit (17). The vibrating wire interface (11) is connected to the input terminal of the preamplifier circuit (12). The output terminal of the preamplifier circuit (12) is connected to the input terminal of the filter circuit (13). The output terminal of the filter circuit (13) is connected to the input terminal of the vibration pickup circuit (14). The output terminal of the vibration pickup circuit (14) is connected to the input terminal of the vibrating wire circuit (15). The input terminal of the vibrating wire circuit (15) is connected to the input terminal of the microcontroller (16). The output terminal of the microcontroller (16) is connected to the input terminal of the excitation circuit (17). The output terminal of the excitation circuit (17) is connected to the vibrating wire interface (11).
2. A telemetry terminal with a vibrating wire interface according to claim 1, characterized in that, The output terminal of the filter circuit (13) is connected to the SEN terminal of the vibration pickup circuit (14). One end of the SEN terminal of the vibration pickup circuit (14) is connected to pin 1 of the vibrating string circuit (15) through a coil Coil, and the other end is connected to pin 2 of the vibrating string circuit (15). Pin 3 of the vibrating string circuit (15) is grounded through a resistor RT.
3. A telemetry terminal with a vibrating wire interface according to claim 2, characterized in that, Pin 11 of the vibrating wire circuit (15) is connected to the external power supply VCC. Pins 9 and 10 of the vibrating wire circuit (15) are grounded. Pins 5 and 6 of the vibrating wire circuit (15) are connected to pins 3 and 2 of the microcontroller (16) respectively. Pin 22 of the vibrating wire circuit (15) is grounded. Pin 19 of the vibrating wire circuit (15) is grounded through switch S01. Pin 17 of the vibrating wire circuit (15) is connected to the sensor excitation power supply VSEN. Pins 16 and 12 of the vibrating wire circuit (15) are grounded. Pin 13 of the vibrating wire circuit (15) is connected to the communication interface RS232 / RS485Port.
4. A telemetry terminal with a vibrating wire interface according to claim 1, characterized in that, The excitation circuit (17) includes a gate-driven optocoupler, model HCPL-3120.
5. A telemetry terminal with a vibrating wire interface according to claim 4, characterized in that, Pin 2 of the gate-driven optocoupler is connected to pin 4 of the microcontroller (16). Pin 3 of the gate-driven optocoupler is grounded through resistor R5. Pin 8 of the gate-driven optocoupler is connected to inductor L1. The other end of inductor L1 is connected to a 15V voltage. Capacitors C3 and C4 are connected in parallel across the two ends of inductor L1. The other end of capacitor C3 is connected to signal ground SGND. The other end of capacitor C4 is grounded through resistor R4.