CN215985837U

CN215985837U - Compressed tea water content measuring instrument

Info

Publication number: CN215985837U
Application number: CN202122294893.3U
Authority: CN
Inventors: 孙力元; 段凤敏; 杨春凤; 马敏
Original assignee: YUNNAN INSTITUTE OF MEASUREMENT TEST TECHNOLOGY RESEARCH
Current assignee: YUNNAN INSTITUTE OF MEASUREMENT TEST TECHNOLOGY RESEARCH
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-03-08
Anticipated expiration: 2031-09-23

Abstract

The utility model provides a compressed tea water content measuring instrument which comprises a measuring instrument body, wherein a composite resistance type humidity sensitive component is arranged in the measuring instrument body, the input end of the composite resistance type humidity sensitive component is connected with two integrated measuring probes, the two measuring probes are arranged on the back surface of the measuring instrument body, the output end of the composite resistance type humidity sensitive component is connected with a frequency-current converter, the output end of the frequency-current converter is connected with a signal strengthening circuit, the input end of the signal strengthening circuit is connected with a temperature compensation circuit, the output end of the signal strengthening circuit is connected with a CPU, the output end of the CPU is connected with an analog-to-digital converter, and the CPU is connected with a calibration circuit. The utility model improves the convenience and the accuracy of use and is suitable for a measurement scene of on-site rapid detection.

Description

Compressed tea water content measuring instrument

Technical Field

The utility model mainly relates to the technical field of portable rapid moisture measuring devices, in particular to a compressed tea moisture content measuring instrument.

Background

In order to facilitate transportation, carrying and storage of tea leaves, particularly Pu 'er tea, the tea leaves need to be compressed into different shapes through steam pressing, tea cakes, tea lumps, tea bricks, pumpkin tributes and the like are common, and the processing procedure formed for convenient storage and transportation just forms an important condition that Pu' er tea is more fragrant. During the steaming and pressing process of Pu' er tea green-sun raw tea or pile-fermented cooked loose tea, the water content of compressed and formed tea needs to be measured so as to judge the influence of the water content in the compressed tea on the quality of the compressed tea, the water content measurement of the tea just after compression and formation has guiding significance on the production process control of the compressed tea, if the water content is too much, the compressed tea may mildew later, and the tea needs to be further dried or spread for drying before storage so as to reduce the water content; in addition, in the process of storage and storage of the compressed tea, the humidity of the storage environment is a key factor for alcoholization of the Pu' er tea, because the tea leaves are humidity-sensitive commodities, the moisture content in the tea leaves can change along with the change of the humidity in the air. If the humidity of the storage environment is too high, the internal water content of the compressed tea is too high, and exceeds the limit condition of normal alcoholization of the Pu' er tea, the tea cake is possibly mildewed; the humidity is too low, aerobic bacteria and anaerobic bacteria required in tea alcoholization do not have survival conditions, the alcoholization process of the compressed tea is slow, and the alcoholization of the tea is not facilitated, so that in the storage and storage process of the compressed tea, particularly, the optimal relation between the storage environment and the water contained in the compressed tea is found by measuring the water process in the compressed tea under the condition of not damaging the appearance of the compressed tea, so as to ensure the alcoholization quality of the compressed tea.

The current water content measuring method comprises a drying method, a distillation method, a dew point method, a Karl Fischer method, a probe method, infrared rays and the like, each method has own advantages and an optimal detected object, compared with the detected object of compressed tea, the probe method can meet the requirements of rapid real-time detection on site, small-area damage to the appearance of a sample, simplicity, convenience and the like, a probe is needed to be adopted for performing water content measurement on the compressed tea, namely a humidity probe sensor is adopted, the water content in the compressed tea of the detected object is rapidly measured on site by utilizing the quantitative relation between a resistance value and the water content in the sample, and the method is suitable for the measuring scene of rapid detection on site.

At present, the portable moisture tester can rapidly test moisture of various tested objects on site, is suitable for scenes with relaxed precision requirements of rapid field measurement, but because the inductive resistance values of each type of tested objects are different, the portable moisture tester needs to adjust correction coefficients according to different tested objects and different measurement principles, so that each sample has different corresponding models, and the uniform measurement of the tested samples corresponding to one instrument cannot be realized.

SUMMERY OF THE UTILITY MODEL

The utility model mainly provides a compressed tea water content measuring instrument which is used for solving the technical problems in the background technology.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

compressed tea moisture content measuring apparatu, including the measuring apparatu body, the measuring apparatu body embeds there is compound resistance type humidity sensitive part, compound resistance type humidity sensitive part input is connected with two measuring probe, two of integral type measuring probe installs at the measuring apparatu body back, compound resistance type humidity sensitive part output is connected with frequency current converter, frequency current converter output is connected with signal reinforcing circuit, signal reinforcing circuit input is connected with temperature compensating circuit, signal reinforcing circuit output is connected with CPU, the CPU output is connected with analog to digital converter, CPU is connected with calibration circuit.

Preferably, the frequency current converter, the signal strengthening circuit, the temperature compensation circuit, the CPU, the analog-to-digital converter and the calibration circuit are all located inside the measuring instrument body.

Preferably, the front surface of the measuring instrument body is provided with an LED display screen.

Preferably, the front surface of the measuring instrument body is respectively provided with a switch button, a gear button and a zero setting button, and a key input disc is arranged under the gear button.

Preferably, one end of each measuring probe is sleeved with a fixed sleeve, and the fixed sleeves are connected with the back of the measuring instrument body.

Preferably, a battery box is arranged on the back of the measuring instrument body, and a battery is arranged in the battery box.

Compared with the prior art, the utility model has the beneficial effects that:

inserting an instrument measuring probe with a built-in composite type resistance type humidity sensitive component into a measured compressed tea cake sample, measuring the resistance value of the compressed tea cake sample, converting the corresponding resistance value into a voltage signal, amplifying the voltage signal, carrying out logarithmic processing on the voltage signal, then carrying out amplification processing on the voltage signal and a temperature compensation voltage signal, inputting the processed voltage value into a CPU, inputting a standard voltage value (a voltage value obtained by measuring a sample processed in advance in a laboratory) of the corresponding sample through a key, comparing and calculating to obtain the actual water content of the measured sample, and improving the accuracy; the accuracy of the measured data is guaranteed.

The present invention will be explained in detail below with reference to the drawings and specific embodiments.

Drawings

FIG. 1 is a perspective view of a meter body according to the present invention;

FIG. 2 is a perspective view of a measurement probe according to the present invention;

FIG. 3 is a schematic back plan view of a measuring device body according to the present invention;

FIG. 4 is a schematic diagram of the circuit structure of the present invention.

In the figure: 1. a gauge body; 2. a composite resistive humidity sensitive component; 3. a measurement probe; 4. a frequency-to-current converter; 5. a signal enhancement circuit; 6. a temperature compensation circuit; 7. a CPU; 8. an analog-to-digital converter; 9. a calibration circuit; 10. an LED display screen; 11. a switch button; 12. a gear button; 13. a zero setting button; 14. a key input pad; 15. fixing a sleeve; 16. a battery case.

Detailed Description

In order to facilitate an understanding of the utility model, the utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the utility model are shown, but which may be embodied in different forms and not limited to the embodiments described herein, but which are provided so as to provide a more thorough and complete disclosure of the utility model.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "left", "right" and the like are used herein for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the knowledge of the terms used herein in the specification of the present invention is for the purpose of describing particular embodiments and is not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-4, the present invention provides a technical solution: compressed tea water content measuring instrument, including measuring instrument body 1, this device is applicable to the compressed tea of moisture content at 5% -40%, measuring instrument body 1 embeds there is compound resistance type humidity sensing part 2, compound resistance type humidity sensing part 2 input is connected with two measuring probe 3 of integral type, two measuring probe 3 installs at the measuring instrument body 1 back, compound resistance type humidity sensing part 2 output is connected with frequency current converter 4, frequency current converter 4 output is connected with signal reinforcing circuit 5, signal reinforcing circuit 5 input is connected with temperature compensating circuit 6, signal reinforcing circuit 5 output is connected with CPU7, CPU7 output is connected with analog-to-digital converter 8, CPU7 is connected with calibration circuit 9, frequency current converter 4, signal reinforcing circuit 5, The temperature compensation circuit 6, the CPU7, the analog-to-digital converter 8 and the calibration circuit 9 are all located inside the measuring instrument body 1, the LED display screen 10 is installed on the front face of the measuring instrument body 1, the switch button 11, the gear button 12 and the zero setting button 13 are respectively arranged on the front face of the measuring instrument body 1, and the key input disc 14 is arranged under the gear button 12. The water content measuring instrument is convenient to adjust through a switch button 11, a gear button 12, a zero setting button 13 and a key input disc 14, different types of tea water content curves are customized and calibrated in the measuring instrument body 1, an automatic calibration process is additionally arranged in the measuring instrument body through a calibration circuit 9, a measuring probe 3 with a built-in composite type resistance type humidity sensitive component 2 is inserted into a measured compressed tea cake sample, the resistance value of the sample is measured, the corresponding resistance value is converted into a voltage signal through a frequency-current converter 4, then the voltage signal is amplified and subjected to logarithmic processing through a signal strengthening circuit 5, then the voltage signal is amplified with a voltage signal of a temperature compensation circuit 6, the processed voltage value is input to a CPU7, a standard voltage value (voltage value obtained by measuring a sample processed in advance in a laboratory) of the corresponding sample is input through the key input disc 14, and the actual water content of the measured sample can be obtained through comparison and calculation, convert the digital display into through adc 8 again, convert the moisture content in the measured object into the signal of telecommunication through relevant circuit, the rethread indicates the measured value on LED display screen 10 to the conversion of signal of telecommunication, has accomplished the water content survey process in the sticis tea promptly, can accomplish that an instrument corresponds most measured sample unified measurement, improves the practicality.

Please refer to fig. 1-3, wherein one end of each measuring probe 3 is sleeved with a fixing sleeve 15, the fixing sleeve 15 is connected to the back of the measuring apparatus body 1, the fixing sleeve 15 increases the stability of the measuring probe 3, prolongs the service life, ensures the accuracy of the measured data, and increases the practicability, the back of the measuring apparatus body 1 is provided with a battery box 16, and a battery is arranged inside the battery box 16.

The specific operation mode of the utility model is as follows:

the measuring probe 3 with the built-in compound resistance type humidity sensitive component 2 is inserted into a measured compressed tea cake sample to measure the resistance value, the corresponding resistance value is converted into a voltage signal through the frequency current converter 4, then the voltage signal is amplified and logarithmically processed through the signal strengthening circuit 5 and then amplified with the voltage signal of the temperature compensation circuit 6, the processed voltage value is input to the CPU7, the standard voltage value (the voltage value measured by the sample processed in advance in a laboratory) of the corresponding sample is input through the key input disc 14 to be compared and calculated to obtain the actual water content of the measured sample, the actual water content is converted into digital display through the analog-digital converter 8, the water content in the measured sample is converted into an electric signal through a related circuit, the measured value is indicated on the LED display screen 10 through the conversion of the electric signal, and the process of measuring the water content in the compressed tea is completed, the method can realize unified measurement of the measured samples corresponding to a plurality of instruments, and improves the practicability.

The utility model is described above with reference to the accompanying drawings, it is obvious that the utility model is not limited to the above-described embodiments, and it is within the scope of the utility model to adopt such insubstantial modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.

Claims

1. Compressed tea moisture content measuring apparatu, including measuring apparatu body (1), its characterized in that: the measuring instrument is characterized in that a composite resistance type humidity sensitive component (2) is arranged in the measuring instrument body (1), the input end of the composite resistance type humidity sensitive component (2) is connected with two measuring probes (3) and two measuring probes (3) of an integral type, the measuring probes (3) are installed on the back surface of the measuring instrument body (1), the output end of the composite resistance type humidity sensitive component (2) is connected with a frequency current converter (4), the output end of the frequency current converter (4) is connected with a signal strengthening circuit (5), the input end of the signal strengthening circuit (5) is connected with a temperature compensation circuit (6), the output end of the signal strengthening circuit (5) is connected with a CPU (7), the output end of the CPU (7) is connected with an analog-to-digital converter (8), and the CPU (7) is connected with a calibration circuit (9).

2. The compressed tea water content measuring instrument according to claim 1, wherein: the frequency current converter (4), the signal strengthening circuit (5), the temperature compensation circuit (6), the CPU (7), the analog-to-digital converter (8) and the calibration circuit (9) are all located inside the measuring instrument body (1).

3. The compressed tea water content measuring instrument according to claim 1, wherein: the LED display screen (10) is installed on the front surface of the measuring instrument body (1).

4. The compressed tea water content measuring instrument according to claim 1, wherein: the measuring instrument is characterized in that the front surface of the measuring instrument body (1) is respectively provided with a switch button (11), a gear button (12) and a zero setting button (13), and a key input disc (14) is arranged under the gear button (12).

5. The compressed tea water content measuring instrument according to claim 1, wherein: each measuring probe (3) is sleeved with a fixed sleeve (15), and the fixed sleeve (15) is connected with the back of the measuring instrument body (1).

6. The compressed tea water content measuring instrument according to claim 1, wherein: the back of the measuring instrument body (1) is provided with a battery box (16), and a battery is arranged in the battery box (16).