Device and system for automatically adjusting driving power of vibrating wire sensor through R-U meter

Abstract

The utility model provides a device and a system for automatically adjusting the driving power of a vibrating wire sensor through an R-U meter. The device comprises a control assembly, a communication assembly, an ADC sampling assembly, a current sampling resistor, a booster circuit, a vibrating wire sensor assembly and a filtering assembly. The filtering assembly is connected with the control assembly and the vibrating wire sensor assembly, the sampling resistor is connected with the boosted circuit and the vibrating wire sensor assembly, the boosted circuit is connected with the control assembly, the ADC sampling assembly is connected with the current sampling resistor, the boosted circuit and the vibrating wire sensor assembly in parallel, and the control assembly is connected with the communication assembly and the ADC sampling assembly. The communication component is used for being connected with an external background server; the ADC sampling assembly is configured to collect driving voltage U and current I; the control assembly is configured to calculate the resistance value of the vibrating wire sensor according to the driving voltage U and the driving current I, adjust the output PWM duty ratio according to the resistance value and a preset R-U table, and adjust the driving voltage. The problem that the driving power cannot be adjusted according to different vibrating wire sensors is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of drive power regulation, and particularly relates to a device and a system for automatically regulating the drive power of a vibrating wire sensor through an R-U meter. Background Art

[0002] A vibrating wire drive circuit is usually used to drive a vibrating wire sensor or a vibrating wire actuator. Such a circuit generally includes a resonant circuit and a power amplifier, which are used to generate and amplify a drive signal so as to drive the vibrating wire to vibrate or detect. Currently, the existing vibrating wire drive circuit can only be excited with a fixed voltage. If the drive power is adjusted too large, it is easy to damage the vibrating wire sensor with low resistance; if the drive power is adjusted too small, the vibrating wire sensor with high resistance cannot start to vibrate and the echo is very weak. In actual use, the drive power cannot be automatically adjusted according to different manufacturers' and different models' vibrating wire sensors connected.

[0003] In view of this, this application is proposed. Content of the Utility Model

[0004] The utility model discloses a device and a system for automatically regulating the drive power of a vibrating wire sensor through an R-U meter, which can effectively solve the problem that the drive power of the existing vibrating wire drive circuit cannot be automatically adjusted according to different manufacturers' and different models' vibrating wire sensors connected.

[0005] The utility model discloses a device for automatically regulating the drive power of a vibrating wire sensor through an R-U meter, including: a control component, a communication component, an ADC sampling component, a current sampling resistor, a boost circuit, a vibrating wire sensor component, and a filtering component;

[0006] Wherein, the output end of the vibrating wire sensor component is electrically connected to the input end of the filtering component, the output end of the filtering component is electrically connected to the input end of the control component, the input end of the vibrating wire sensor component is electrically connected to the output end of the current sampling resistor, the input end of the sampling resistor is electrically connected to the output end of the boost circuit, the input end of the boost circuit is electrically connected to the output end of the control component, the voltage input end and the first current input end of the ADC sampling component are connected in parallel with the current sampling resistor and the boost circuit, the second current input end of the ADC sampling component is connected in parallel with the vibrating wire sensor component and the current sampling resistor, the output end of the ADC sampling component is electrically connected to the input end of the control component, the data end of the control component is electrically connected to the data end of the communication component, and the communication component is used to connect to an external background server;

[0007] Wherein, the ADC sampling component is configured to collect a drive voltage U and a drive current I;

[0008] Among them, the control component is configured to calculate the resistance value of the vibrating wire sensor according to the driving voltage U and driving current I collected by the ADC sampling component, and adjust the PWM duty cycle of the output according to the resistance value of the vibrating wire sensor and the preset R-U table to adjust the driving voltage.

[0009] Preferably, the control component includes a microcontroller and a power supply component. Among them, the input end of the controller is electrically connected to the power supply end of the power supply component, the output end of the filtering component is electrically connected to the input end of the microcontroller, the input end of the boost circuit is electrically connected to the output end of the microcontroller, the output end of the ADC sampling component is electrically connected to the input end of the microcontroller, and the data end of the microcontroller is electrically connected to the data end of the communication component.

[0010] Preferably, the chip model of the microcontroller is R7FA6M3.

[0011] Preferably, the vibrating wire sensor component includes a vibrating wire sensor and a vibrating wire sensor interface. Among them, the data end of the vibrating wire sensor is electrically connected to the data end of the vibrating wire sensor interface, the input end of the vibrating wire sensor interface is electrically connected to the output end of the current sampling resistor, and the output end of the vibrating wire sensor interface is electrically connected to the input end of the filtering component.

[0012] Preferably, the filtering component includes a follower, a low-pass filter, and a band-pass filter. Among them, the output end of the vibrating wire sensor component is electrically connected to the input end of the follower, the output end of the follower is electrically connected to the input end of the low-pass filter, the output end of the low-pass filter is electrically connected to the input end of the band-pass filter, and the output end of the band-pass filter is electrically connected to the input end of the control component.

[0013] Preferably, the ADC sampling component includes a voltage ADC sampling module and a current ADC sampling module. Among them, the input end of the voltage ADC sampling module is connected in parallel with the current sampling resistor and the boost circuit, the first current input end of the current ADC sampling module is connected in parallel with the current sampling resistor and the boost circuit, the second current input end of the current ADC sampling module is connected in parallel with the vibrating wire sensor component and the current sampling resistor, and the output ends of the voltage ADC sampling module and the current ADC sampling module are electrically connected to the input end of the control component.

[0014] Preferably, the communication component is a 4G communication module.

[0015] The present utility model also discloses a system for automatically adjusting the driving power of a vibrating wire sensor through an R-U table, which includes a background server and a device for automatically adjusting the driving power of a vibrating wire sensor through an R-U table as described above. Among them, the communication component is connected to the background server for data interaction.

[0016] In summary, for the device and system for automatically adjusting the driving power of a vibrating wire sensor through an R-U table provided in this embodiment, an initial voltage value is obtained from a preset R-U table at the beginning, the device is driven according to the initial voltage value, the ADC sampling component is controlled to continuously collect the driving voltage U and driving current I generated during the driving process, the resistance value of the vibrating wire sensor is calculated according to the driving voltage U and driving current I collected by the ADC sampling component, and then it is determined whether the waveform of the resistance value of the vibrating wire sensor matches the standard waveform recorded in the preset R-U table. When it matches, it means it meets the standard; when it does not match, the PWM duty cycle is adjusted according to the R-U table to adjust to the driving voltage. Thus, the problem in the prior art that the driving power of the vibrating wire driving circuit cannot automatically adjust the driving power according to different manufacturers and models of vibrating wire sensors connected is solved. Description of the Drawings

[0017] Figure 1 is a schematic structural principle diagram of a device for automatically adjusting the driving power of a vibrating wire sensor through an R-U table provided by an embodiment of the present utility model;

[0018] Figure 2 is a schematic principle flow diagram of a device for automatically adjusting the driving power of a vibrating wire sensor through an R-U table provided by an embodiment of the present utility model. Detailed Embodiments

[0019] To make the purpose, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0020] The following will describe in detail the specific embodiments of the present utility model in conjunction with the drawings.

[0021] Please refer to Figures 1 to 2 , the first embodiment of the present utility model provides a device for automatically adjusting the driving power of a vibrating wire sensor through an R-U table, including: a control component, a communication component, an ADC sampling component, a current sampling resistor, a boost circuit, a vibrating wire sensor component, and a filtering component;

[0022] Among them, the output end of the vibrating wire sensor component is electrically connected to the input end of the filtering component, the output end of the filtering component is electrically connected to the input end of the control component, the input end of the vibrating wire sensor component is electrically connected to the output end of the current sampling resistor, the input end of the sampling resistor is electrically connected to the output end of the boost circuit, the input end of the boost circuit is electrically connected to the output end of the control component, the voltage input end and the first current input end of the ADC sampling component are connected in parallel with the current sampling resistor and the boost circuit, the second current input end of the ADC sampling component is connected in parallel with the vibrating wire sensor component and the current sampling resistor, the output end of the ADC sampling component is electrically connected to the input end of the control component, the data end of the control component is electrically connected to the data end of the communication component, and the communication component is used to connect to an external background server;

[0023] Among them, the ADC sampling component is configured to collect the driving voltage U and the driving current I;

[0024] Among them, the control component is configured to calculate the vibrating wire sensor resistance value according to the driving voltage U and the driving current I collected by the ADC sampling component, and adjust the PWM duty cycle of the output according to the vibrating wire sensor resistance value and the preset R-U table to adjust the driving voltage.

[0025] Preferably, the vibrating wire sensor component includes a vibrating wire sensor and a vibrating wire sensor interface. Among them, the data end of the vibrating wire sensor is electrically connected to the data end of the vibrating wire sensor interface, the input end of the vibrating wire sensor interface is electrically connected to the output end of the current sampling resistor, and the output end of the vibrating wire sensor interface is electrically connected to the input end of the filtering component.

[0026] Preferably, the filtering component includes a follower, a low-pass filter, and a band-pass filter. Among them, the output end of the vibrating wire sensor component is electrically connected to the input end of the follower, the output end of the follower is electrically connected to the input end of the low-pass filter, the output end of the low-pass filter is electrically connected to the input end of the band-pass filter, and the output end of the band-pass filter is electrically connected to the input end of the control component.

[0027] Preferably, the ADC sampling component includes a voltage ADC sampling module and a current ADC sampling module. Among them, the input end of the voltage ADC sampling module is connected in parallel with the current sampling resistor and the boost circuit. The first current input end of the current ADC sampling module is connected in parallel with the current sampling resistor and the boost circuit. The second current input end of the current ADC sampling module is connected in parallel with the vibrating wire sensor component and the current sampling resistor. The output ends of the voltage ADC sampling module and the current ADC sampling module are electrically connected to the input end of the control component.

[0028] Specifically, in this embodiment, an external background server can send a collection instruction to the communication component through the public network to trigger the startup of the device for automatically adjusting the driving power of the vibrating wire sensor through the R-U table. The controller component controls the boost circuit not to output a PWM signal. At this time, a known basic driving voltage U is output to drive the ADC sampling component to collect the driving voltage U, and the driving current I is collected through the sampling resistor R. The resistance value of the vibrating wire sensor is calculated according to the formula R = U / I. The appropriate driving voltage U1 is obtained according to the pre-established basic R-U look-up table. The R-U table is a one-to-one correspondence table established between vibrating wire sensors with different internal resistances and their corresponding driving voltages, which can be continuously updated.

[0029] Subsequently, the control component controls the PWM duty cycle of the boost circuit to reach the appropriate driving voltage U1, and judges whether the actual driving voltage reaches the driving voltage U1 according to the actual driving voltage U1 collected by the ADC sampling component. If it does not reach, the PWM duty cycle is increased or decreased to adjust to the driving voltage U1. Among them, after passing through the signal processing circuit, the vibrating wire echo ADC waveform is collected. If the peak-to-peak value of the ADC waveform is between 100 mV and 150 mV, then this voltage U1 is considered the appropriate voltage for the transducer with this internal resistance value. If the echo amplitude < 100 mV, the PWM duty cycle is increased to increase the driving voltage U1. If the echo amplitude > 150 mV, the PWM duty cycle is decreased to decrease the driving voltage U1 until the appropriate driving voltage U1 is found.

[0030] Finally, the control component can report the collected vibrating wire sensor frequency value to the platform through the communication component and update the R-U table corresponding to the resistance R at the terminal.

[0031] Preferably, the control component includes a microcontroller and a power supply component. Among them, the input end of the controller is electrically connected to the power supply end of the power supply component, the output end of the filtering component is electrically connected to the input end of the microcontroller, the input end of the boost circuit is electrically connected to the output end of the microcontroller, the output end of the ADC sampling component is electrically connected to the input end of the microcontroller, and the data end of the microcontroller is electrically connected to the data end of the communication component.

[0032] The chip model of the microcontroller can be R7FA6M3.

[0033] In this embodiment, R7FA6M3 is a microcontroller chip based on the Arm Cortex-M3 core. This chip has a wide range of applications in the fields of Internet of Things, industrial control, home appliance control, etc.; it has high performance, rich peripheral interfaces, low-power design, security functions and industrial-grade characteristics, and is suitable for various Internet of Things, industrial control and embedded application scenarios. It should be noted that in other embodiments, microcontrollers of other types of structures can also be used, which are not specifically limited here, but these solutions are all within the protection scope of the present invention.

[0034] Preferably, the communication component can be a 4G communication module.

[0035] In this embodiment, a 4G communication module is used as the communication component. A 4G communication module is a modular device integrating 4G communication functions, and is usually used in Internet of Things (IoT) devices, smart devices and other devices that require wireless communication functions. This module internally integrates necessary components such as a 4G communication chip, an antenna, a radio frequency front end, a processor, a memory, etc., and can realize data transmission and communication between the device and the 4G network. It has the advantages of high-speed data transmission, strong stability, wide coverage, support for multiple applications, strong real-time performance, maturity and stability, and is suitable for various devices that require wireless communication functions. It should be noted that in other embodiments, communication components of other types of structures can also be used, which are not specifically limited here, but these solutions are all within the protection scope of the present invention.

[0036] In summary, the device for automatically adjusting the driving power of the vibrating wire sensor through the R-U table can continuously update and learn the R-U table to adapt to vibrating wire sensors with various internal resistances, dynamically adjust the driving power by collecting the internal resistance values of the vibrating wire sensors, solve the problem of using different driving powers for different sensors on site, and make the collected frequency data more stable.

[0037] The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention.

Claims

1. A device for automatically adjusting the driving power of a vibrating wire sensor by means of an RU meter, characterized in that: include: Control component, communication component, ADC sampling component, current sampling resistor, boost circuit, vibrating string sensor component, and filtering component; Wherein, the output end of the vibrating string sensor component is electrically connected to the input end of the filter component, the output end of the filter component is electrically connected to the input end of the control component, the input end of the vibrating string sensor component is electrically connected to the output end of the current sampling resistor, the input end of the sampling resistor is electrically connected to the output end of the boost circuit, the input end of the boost circuit is electrically connected to the output end of the control component, the voltage input end of the ADC sampling component and the first current input end of the ADC sampling component are connected in parallel with the current sampling resistor and the boost circuit, the second current input end of the ADC sampling component is connected in parallel with the vibrating string sensor component and the current sampling resistor, the output end of the ADC sampling component is electrically connected to the input end of the control component, the data end of the control component is electrically connected to the data end of the communication component, and the communication component is used to connect to an external background server; Wherein, the ADC sampling component is configured to collect the driving voltage U and the driving current I; Wherein, the control component is configured to calculate the resistance value of the vibrating string sensor according to the driving voltage U and driving current I collected by the ADC sampling component, and adjust the output PWM duty cycle according to the resistance value of the vibrating string sensor and a preset RU table to adjust the driving voltage.

2. The device for automatically adjusting the driving power of a vibrating wire sensor by means of an RU meter according to claim 1, characterized in that: The control component includes a microcontroller and a power supply component, wherein the input end of the controller is electrically connected to the power supply end of the power supply component, the output end of the filter component is electrically connected to the input end of the microcontroller, the input end of the boost circuit is electrically connected to the output end of the microcontroller, the output end of the ADC sampling component is electrically connected to the input end of the microcontroller, and the data end of the microcontroller is electrically connected to the data end of the communication component.

3. The device for automatically adjusting the driving power of a vibrating wire sensor by means of an RU meter according to claim 2, characterized in that: The chip model of the microcontroller is R7FA6M3.

4. The device for automatically adjusting the driving power of a vibrating wire sensor by means of an RU meter according to claim 1, characterized in that: The vibrating string sensor component includes a vibrating string sensor and a vibrating string sensor interface, wherein a data end of the vibrating string sensor is electrically connected to a data end of the vibrating string sensor interface, an input end of the vibrating string sensor interface is electrically connected to an output end of the current sampling resistor, and an output end of the vibrating string sensor interface is electrically connected to an input end of the filter component.

5. The device for automatically adjusting the driving power of a vibrating wire sensor by using an RU meter according to claim 1, characterized in that: The filtering component includes a follower, a low-pass filter, and a band-pass filter, wherein the output end of the vibrating string sensor component is electrically connected to the input end of the follower, the output end of the follower is electrically connected to the input end of the low-pass filter, the output end of the low-pass filter is electrically connected to the input end of the band-pass filter, and the output end of the band-pass filter is electrically connected to the input end of the control component.

6. The device for automatically adjusting the driving power of a vibrating wire sensor by using an RU meter according to claim 1, characterized in that: The ADC sampling component includes a voltage ADC sampling module and a current ADC sampling module, wherein the input end of the voltage ADC sampling module is connected in parallel with the current sampling resistor and the boost circuit, the first current input end of the current ADC sampling module is connected in parallel with the current sampling resistor and the boost circuit, the second current input end of the current ADC sampling module is connected in parallel with the vibrating string sensor component and the current sampling resistor, and the output end of the voltage ADC sampling module and the output end of the current ADC sampling module are electrically connected to the input end of the control component.

7. The device for automatically adjusting the driving power of a vibrating wire sensor by using an RU meter according to claim 1, characterized in that: The communication component is a 4G communication module.

8. A system for automatically adjusting the driving power of a vibrating wire sensor by means of an RU meter, characterized in that: The invention comprises a background server and a device for automatically adjusting the driving power of a vibrating-wire sensor by using an RU meter as claimed in any one of claims 1 to 7, wherein the communication component is connected to the background server for data exchange.

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