Handheld viscosity sensor

Abstract

The utility model relates to viscosity measuring instrument technical field, and disclose a handheld viscosity sensor, including measuring end and handheld end, the measuring end is connected with handheld end and forms the whole, the measuring end includes tuning fork oscillation piece, temperature measurement probe shell, piezoelectric ceramic transducer piece and viscosity probe fixing piece for measuring density and viscosity, the handheld end includes circuit board, display terminal and battery body, the circuit board is connected with tuning fork oscillation piece and temperature sensor, is used for processing measurement signal and is exported to display terminal, as the further scheme of the utility model, the temperature measurement probe shell inside encapsulation has the temperature sensor for measuring temperature, the temperature sensor is connected through the wire with the circuit board, the utility model discloses only need to immerse the measuring probe front end part in the oil liquid in the measurement, press the measurement switch, after waiting for a few seconds, the viscosity, density, temperature numerical value of current measured oil liquid can be exported in the display screen, convenient operation and carry.

Description

Technical Field

[0001] This utility model relates to the field of viscosity measurement instrument technology, and more specifically to a handheld viscosity sensor. Background Technology

[0002] In numerous industrial sectors such as petrochemicals, lubricants, coatings, inks, food and beverages, pharmaceuticals, and cosmetics, the density and viscosity of liquids are core indicators determining process stability and final product quality. However, due to limitations in structural size or cost, online sensors cannot be installed in most operating conditions, requiring reliance on traditional laboratory testing: sampling → testing → waiting for results. This entire process often takes several hours or even longer, resulting in significant data lag and making it difficult to meet real-time control requirements.

[0003] In contrast, handheld viscometers allow operators to quickly complete measurements directly next to the production line, in the tank area, at the loading port, or on the equipment site, to monitor product quality, process stability, and lubricant status in real time, and to adjust the formula or process parameters immediately, thereby reducing the defect rate, reducing equipment downtime, and significantly improving production efficiency and consistency.

[0004] Existing viscosity measurement principles mainly include capillary method, rotation method, ultrasonic method, and vibration method. Based on the application scenario, the corresponding products can be divided into two categories: One type is the online fixed measuring instrument: it is permanently installed on the process pipeline by thread or flange, and the measurement data needs to be transmitted to the central control system. It cannot be read on-site and does not support handheld sampling measurement.

[0005] Another type is offline (laboratory) measuring instruments: existing instruments are bulky and heavy, inconvenient to carry, and difficult to meet the needs of rapid on-site sampling or maintenance personnel inspection. Utility Model Content

[0006] To overcome the shortcomings of existing viscosity measuring instruments that cannot be used handheld or as portable measuring instruments, a handheld viscosity measuring instrument is provided. This viscosity measuring instrument can not only measure the viscosity, density, and temperature of lubricating oils, but is also convenient to operate and carry.

[0007] This utility model provides the following technical solution: a handheld viscosity sensor, including a measuring end and a handheld end, wherein the measuring end and the handheld end are connected to form an integral unit; The measuring end includes a tuning fork diaphragm, a temperature probe housing, a piezoelectric ceramic transducer, and a viscosity probe holder, and is used to measure density and viscosity. The handheld device includes a circuit board, a display terminal, and a battery body. The circuit board is connected to a tuning fork diaphragm and a temperature sensor to process measurement signals and output them to the display terminal.

[0008] As a further embodiment of this invention, the temperature sensor for measuring temperature is encapsulated inside the housing of the temperature probe, and the temperature sensor is connected to the circuit board via wires.

[0009] As a further embodiment of this invention, the measuring end also includes a protective cover and a front outer shell. The protective cover is connected to the viscosity probe fixing component by threads, and the viscosity probe fixing component is connected to the front outer shell by a combination of threads and welding.

[0010] As a further embodiment of this invention, the protective cover and the front outer shell form a sealed structure.

[0011] As a further embodiment of this invention, the piezoelectric ceramic transducer is connected to the circuit board via a wire.

[0012] As a further embodiment of this utility model, the handheld terminal also includes a rear shell, with a circuit board disposed inside the rear shell, and measurement and control function buttons and switches arranged on the circuit board.

[0013] As a further embodiment of this invention, the push-button switch protrudes to the surface of the rear housing and is used to trigger the measurement.

[0014] As a further embodiment of this utility model, the battery body is detachably disposed inside the rear housing, and a battery cover is threadedly connected to the end of the rear housing. The battery body is electrically connected to the circuit board via a spring and the battery cover.

[0015] As a further embodiment of this utility model, the tuning fork diaphragm and the temperature probe housing are exposed on the surface of the viscosity probe fixing component, and the tuning fork diaphragm generates a frequency through the piezoelectric ceramic transducer inside the viscosity probe fixing component.

[0016] The measuring probe is designed with a tuning fork oscillator and a Pt1000 temperature sensor. Viscosity and density are obtained by the resonant frequency, quality factor and vibration attenuation characteristics of the tuning fork oscillator, while temperature is obtained by the resistance of the PT1000. The two measurement parameters are then connected to the acquisition circuit and conversion circuit through internal wires and transmitted to the display terminal to directly output the results.

[0017] As a further embodiment of this invention, the display terminal is used to directly output and display viscosity, density, and temperature values.

[0018] The technical effects and advantages of this utility model are as follows: the handheld viscosity meter can be used for measurement by hand, making it extremely convenient to carry and operate.

[0019] The principle behind these beneficial effects is as follows: During measurement, the handheld end is used to immerse the measuring probe in the oil. The measuring switch is pressed, and after a few seconds, the display screen will output the viscosity, density, and temperature values ​​of the oil being measured. For on-site measurement personnel or maintenance and inspection personnel, time is efficiency, and measuring the current viscosity index of the oil in a short time has a certain incremental benefit. Attached Figure Description

[0020] Figure 1 This is a longitudinal sectional view of the present invention.

[0021] Figure 2 This utility model Figure 1 The left projection view.

[0022] Figure 3 This utility model Figure 1 Top view cross-sectional structural diagram.

[0023] The attached diagram is labeled as follows: 1. Protective cover; 2. Front outer shell; 3. Circuit board; 4. Push button switch; 5. Display terminal; 6. Rear outer shell; 7. Battery cover; 8. Battery body; 9. Spring; 10. Viscosity probe fixing component; 101. Tuning fork diaphragm; 102. Temperature probe shell; 103. Piezoelectric ceramic transducer; 104. Temperature sensor; 201. Measuring end; 202. Handheld end. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. This utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] Reference Figure 1 - Figure 3 This utility model provides a handheld viscosity sensor, in Figure 1 In this embodiment, it includes a measuring end 201 and a handheld end 202, with the measuring end 201 connected to the handheld end 202 as a whole via threads. The measuring end 201 is provided with a protective cover 1 to protect the tuning fork diaphragm 101 and the temperature probe housing 102; the protective cover 1 is connected to the viscosity probe fixing component 10 via threads, and the viscosity probe fixing component 10 is connected to the front housing 2 via threads and welding, ensuring that the measuring end 201 forms a waterproof structure during measurement.

[0026] Specifically, the handheld device 202 consists of a circuit board 3, a push-button switch 4, a display terminal 5, a rear shell 6, a battery cover 7, a battery body 8, and a spring 9.

[0027] Inside the rear casing 6 is a circuit board 3, on which are arranged measurement and control function push-button switches 4. The push-button switches 4 protrude from the surface of the rear casing 6 for easy pressing down. The rear casing 6 also houses the battery body 8, which serves as the power source for the system. The battery body 8 supplies power to the system through the battery cover 7, spring 9, and circuit board 3. The battery cover 7 is threadedly connected to the rear casing 6, facilitating the removal and replacement of the battery body 8.

[0028] Figure 2 The tuning fork diaphragm 101 and the temperature probe housing 102 are exposed on the surface of the viscosity probe fixture 10 to contact the oil being measured.

[0029] Specifically, the tuning fork 101 generates a certain frequency through the piezoelectric ceramic transducer 103 inside the viscosity probe fixing component 10. The frequency of the tuning fork 101 varies in different viscosity liquids, and the excitation energy required for the piezoelectric ceramic transducer 103 is also different.

[0030] The piezoelectric ceramic transducer 103 is connected to the circuit board 3 via wires, transmitting the excitation energy signal to the circuit board 3 for processing, and then outputting it to the display terminal 5 through algorithm program compilation.

[0031] The temperature sensor 104 is encapsulated inside the housing 102 of the temperature probe for measuring temperature. The temperature sensor 104 is a PT1000. The temperature sensor 104 is connected to the circuit board 3 through wires, and transmits the temperature signal to the circuit board 3 for processing. Then, it is compiled by the algorithm program and output to the display terminal 5.

[0032] The tuning fork oscillator 101 and the piezoelectric ceramic transducer 103 are used to measure density and viscosity. After sending an excitation signal to the piezoelectric ceramic transducer, the aftershock signal of the oscillator is collected. The signal is subjected to a fast Fourier transform (FFT) to extract the fundamental frequency and quality factor. At the same time, the attenuation coefficient is calculated. After passing through the algorithm model, the viscosity and density are obtained and finally output to the display terminal 5.

[0033] Further explanation: The measuring probe is the front section, while the integrated circuit, display screen, battery power supply, and charging interface are integrated into one unit as the rear section. During measurement, the rear section is held by hand, and the front section of the measuring probe is immersed in the oil. The measurement switch is then activated to complete the measurement. Specifically, the handheld end is used to immerse the measuring probe in the oil, press the measurement switch, and wait a few seconds. The display screen will then output the viscosity, density, and temperature values ​​of the oil being measured. For on-site measurement personnel or maintenance and inspection personnel, time is efficiency; measuring the current oil viscosity index in a short time has a significant incremental benefit. In this invention, it should be noted that the measuring probe internally incorporates a tuning fork oscillator and a Pt1000 temperature sensor. Viscosity and density are obtained through the tuning fork oscillator's resonant frequency, quality factor, and vibration attenuation characteristics, while temperature is obtained through the resistance of the PT1000 sensor. These two measurement parameters are then connected via internal wires to a data acquisition circuit, a conversion circuit, and transmitted to a display terminal for direct output of the results.

[0034] Finally, the following points should be noted: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change. The electronic components and modules used in this utility model can all be parts that are commonly used in the market and can achieve the specific functions in this case. The specific models and sizes can be selected and adjusted according to actual needs. The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

Claims

1. A handheld viscosity sensor, characterized in that: It includes a measuring end (201) and a handheld end (202), wherein the measuring end (201) and the handheld end (202) are connected to form a whole; The measuring end (201) includes a tuning fork diaphragm (101), a temperature probe housing (102), a piezoelectric ceramic transducer (103), and a viscosity probe holder (10), and is used to measure density and viscosity; The handheld terminal (202) includes a circuit board (3), a display terminal (5) and a battery body (8). The circuit board (3) is connected to a tuning fork diaphragm (101) and a temperature sensor (104) to process measurement signals and output them to the display terminal (5).

2. The handheld viscosity sensor according to claim 1, characterized in that: The temperature sensor (104) for measuring temperature is encapsulated inside the housing (102) of the temperature probe. The temperature sensor (104) is connected to the circuit board (3) via wires.

3. The handheld viscosity sensor according to claim 1, characterized in that: The measuring end (201) also includes a protective cover (1) and a front shell (2). The protective cover (1) is connected to the viscosity probe fixing part (10) by threads, and the viscosity probe fixing part (10) is connected to the front shell (2) by threads and welding.

4. The handheld viscosity sensor according to claim 3, characterized in that: The protective cover (1) and the front outer shell (2) form a sealed structure.

5. The handheld viscosity sensor according to claim 1, characterized in that: The piezoelectric ceramic transducer (103) is connected to the circuit board (3) via a wire.

6. The handheld viscosity sensor according to claim 1, characterized in that: The handheld device (202) also includes a rear housing (6), and a circuit board (3) is located inside the rear housing (6). The circuit board (3) is equipped with measurement and control function key switches (4).

7. The handheld viscosity sensor according to claim 6, characterized in that: The push button switch (4) protrudes onto the surface of the rear housing (6) and is used to trigger the measurement.

8. The handheld viscosity sensor according to claim 1, characterized in that: The battery body (8) is detachably disposed inside the rear housing (6), and the rear housing (6) is threadedly connected to the end of the battery cover (7). The battery body (8) is electrically connected to the circuit board (3) through the spring (9) and the battery cover (7).

9. The handheld viscosity sensor according to claim 1, characterized in that: The tuning fork diaphragm (101) and the temperature probe housing (102) are exposed on the surface of the viscosity probe fixture (10). The tuning fork diaphragm (101) generates a frequency through the piezoelectric ceramic transducer (103) inside the viscosity probe fixture (10).

10. The handheld viscosity sensor according to claim 1, characterized in that: The display terminal (5) is used to directly output and display viscosity, density and temperature values.

Images