CN214121902U - Portable raw meat quality system hydraulic tester - Google Patents
Portable raw meat quality system hydraulic tester Download PDFInfo
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- CN214121902U CN214121902U CN202022853292.7U CN202022853292U CN214121902U CN 214121902 U CN214121902 U CN 214121902U CN 202022853292 U CN202022853292 U CN 202022853292U CN 214121902 U CN214121902 U CN 214121902U
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Abstract
The application belongs to the technical field of food detection instruments and equipment, and particularly relates to a portable raw meat quality system hydraulic tester and a system hydraulic testing method. The tester consists of a weighing mechanism and a pressurizing mechanism; weighing platform surface is located to loading system includes: the pressure sensor and the pressurizing device are fixedly arranged in the middle of the surface of the weighing table top; wherein the pressurizing device comprises: the tail end of the pressure rod is provided with a pressure rod for pressing a sheet and a fixing frame for fixing the pressure rod; weighing machine constructs includes: the weighing table comprises a weighing table surface and a weighing display surface for displaying a weighing result. The accuracy of the measurement result can be controlled to be less than 0.5%, and the method has the advantages of long service life of detection equipment, high speed, convenience and quickness in detection, easiness in carrying, wide application environment, strong practicability, low production cost and the like, can lay a good technical foundation for detection of related raw meat products and quality control of raw meat, and therefore has better practical value and popularization and application significance.
Description
Technical Field
The application belongs to the technical field of food detection instruments and equipment, and particularly relates to a portable raw meat quality system hydraulic tester and a system hydraulic testing method.
Background
Raw meat (e.g., raw pork, raw beef, etc.) is one of the most important basic parameters for raw meat quality determination. The water retention capacity is an important index for measuring the quality of meat, and refers to the capacity of the muscle to retain original water and add water under the action of external force, such as processing or storage conditions of pressurization, chopping, heating, freezing, thawing, pickling and the like. The water in animal muscle can be divided into bound water, free water and water which is not easy to flow according to its physical and chemical properties, and the water which is the water of tying is mainly the water which is not easy to flow. The research suggests that the water is far away from the protein hydrophilic group in vivo, the binding with the protein is not tight, the water is easily influenced by the structure and charge change of the protein, and the water binding capacity is reduced when the muscle contracts or the charge number of the protein is reduced.
In the prior art, methods for detecting the hydraulic quality of raw meat mainly comprise a pressure method, a dripping loss method, a breaking rate method, a cooking loss method and the like, and partial portable detection equipment is developed based on the methods, but the defects of complex detection operation, time and labor waste, difficulty in carrying the detection equipment or expensive instruments and the like exist, so that the development of a new hydraulic detection instrument with low cost, simplicity and convenience is still necessary.
Disclosure of Invention
The main purpose of this application is to provide a portable raw meat quality system hydraulic tester to establish certain technological basis for relevant meat products detect.
The technical solution adopted in the present application is detailed as follows.
A portable raw meat quality system hydraulic tester comprises a weighing mechanism and a pressurizing mechanism;
the pressurization mechanism is arranged on the surface of the weighing table top and comprises: the pressure sensor and the pressurizing device are fixedly arranged in the middle of the surface of the weighing table top; wherein the pressurizing device comprises: the tail end of the pressure rod is provided with a pressure rod for pressing a sheet and a fixing frame for fixing the pressure rod; specifically, the method comprises the following steps:
the pressure sensor is arranged on the pressing sheet opposite to the weighing table; in order to apply pressure, a handle is arranged at one end of the pressurizing rod, which is far away from the pressing sheet, so that the operation is convenient; on the other hand, in order to apply the pressurizing operation, a spiral lifting rod can be adopted as the pressurizing rod;
the fixing frame is detachably and vertically fixed on the surface of the weighing table top, so that the weighing table is convenient to carry or maintain, is in a Jiong-shaped structure and comprises fixing columns on two sides and a cross bar on the upper part, and the pressurizing rod penetrates through a fixing hole formed in the cross bar on the upper part and corresponds to the pressure sensor, so that the movable direction of the pressurizing rod is fixed;
in the preferred design, guide rods are designed on fixing columns which are arranged on two sides of the fixing frame and parallel to a cross rod on the upper portion of the fixing frame, and the pressurizing rod penetrates through the cross rod and then penetrates through the guide rods, so that possible swinging or displacement of the pressurizing rod in the horizontal direction is avoided;
the weighing mechanism is similar to the prior conventional platform scale, namely comprises: the weighing platform comprises a weighing platform surface and a weighing display surface for displaying a weighing result;
the weighing table top is a flat surface, the pressure sensor is connected with the weighing display surface at the bottom of the table top, and the measuring result is displayed through the weighing display surface;
in a preferred design, the pressure sensor is electrically connected with a power supply to realize power supply; the power supply preferably adopts a built-in storage type fixed power supply, or the random switching between the storage power supply and an alternating current power supply can be realized through an electric control module;
the weighing display surface is a digital display surface provided with a display screen, and the display screen and the voltage force sensor can adopt a common power supply as a power source.
In order to match weighing and display requirements of the electronic weighing mechanism, a power switch device, a weighing calibration module, a weighing unit switching module and the like can be further designed in the optimal design.
The pressure sensor can be a Jinnuo brand stainless steel JHBM-H1 type plane weighing sensor product (the outer diameter is 56mm, the height is 30 mm), so that the measurement requirements of the measuring instrument provided by the application are better met;
the weighing display surface matched with the pressure sensor is specifically, for example, an MCK-Z-I type display control instrument of Jinnuo brand is adopted, and the instrument has good display and control effects.
The raw meat hydraulic measuring method using the portable raw meat quality hydraulic measuring instrument comprises the following steps:
(1) sample preparation
Cutting a meat slice with the thickness of about 1cm, and sampling the middle part of the meat slice by using a sampler with the diameter of 2.523 as a sample to be detected;
the meat sample is specifically, for example: meat samples of leg muscles, longissimus dorsi, pectoralis muscles and the like of pork and beef, wherein the weight of the meat samples is 2-32 g, and 8g is preferred;
(II) specific measurement
After the zero setting calibration of the tester, weighing and recording the weight of the meat sample before pressurization;
placing the meat sample wrapped by the water absorbing material on a pressure sensor, pressurizing the meat sample to a required pressure by adjusting a handle, and keeping the squeezing time;
the water absorbing material is conventional filter paper; during specific operation, in order to facilitate the operation, a raw meat sample is wrapped by gauze, and then conventional filter paper is wrapped outside the raw meat sample; generally speaking, for a square meat sample, two layers are respectively arranged above and below gauze, and the conventional filter paper can be set to be not less than 30 layers, so that the requirement of water absorption is met;
the meat sample pressurizing pressure is as follows: 250-450N, and the pressing time is as follows: 1-7 min; preferably: pressurizing at 350N for 5 min;
(III) calculation of water power
Removing the conventional filter paper and gauze wrapped outside the meat sample, weighing the meat sample again and recording data; at this time:
weight loss = weight before pressurization-weight after pressurization = weight of water absorbed by the water absorbing material;
water loss (%) = [ (weight before meat sample pressing-weight after meat sample pressing)/weight before meat sample pressing ] × 100;
hydraulic =1- (water loss ÷ moisture content of the meat sample).
Based on the research on the conventional hydraulic force detecting instrument, the inventor redevelops and designs a portable hydraulic force measuring instrument in the application. The primary detection application effect shows that the accuracy of the determination result can be controlled to be less than 0.5% (better than +/-1% of the ISO standard) by matching with the selection of a sensor with a specific model, the integral structure design and the sample selection optimization. And the method has the advantages of long service life of detection equipment, high speed, convenience and quickness in detection, easiness in carrying, wide applicable environment, strong practicability, low production cost and the like, and can lay a good technical foundation for detection of related raw meat products and quality control of raw meat, so that the method has better practical value and popularization and application significance.
Drawings
FIG. 1 is a schematic structural view of a water measuring instrument provided in the present application;
FIG. 2 is a left side view of the present invention showing a hydraulic tester;
FIG. 3 shows the result of water loss measurement of pork samples;
FIG. 4 shows the results of the measurement of the water loss of the beef sample.
Detailed Description
The present application is further explained below with reference to the drawings and examples.
Example 1
The structure of the raw meat quality water power measuring instrument provided by the application is briefly introduced as follows by taking specific model parts and optimized design as examples.
As shown in fig. 1 and 2, the raw meat quality system hydraulic tester provided by the application comprises a weighing mechanism and a pressurizing mechanism;
the pressurizing mechanism is arranged on the surface of the weighing table board 6 and comprises: the pressure sensor 8 and the pressurizing device are fixedly arranged in the middle of the surface of the weighing platform surface 6; wherein the pressurizing device comprises: the tail end of the pressure rod 2 is provided with a pressure sheet 9 and a fixing frame 5 for fixing the pressure rod; specifically, the method comprises the following steps:
the pressure sheet 9 is opposite to the pressure sensor 8 arranged on the weighing table; in order to apply pressure, the end of the pressure rod 2 far away from the pressure sheet 9 is provided with a handle 1, so that the operation is convenient; on the other hand, in order to facilitate the pressurizing operation, the pressurizing rod 2 may be a screw elevating rod;
the fixing frame 5 is detachably and vertically fixed on the surface of the weighing table top, so that the weighing table top is convenient to carry or maintain, is in a structure similar to a shape of Jiong and comprises fixing columns on two sides and a cross rod 3 on the upper part, and the pressure rod 2 penetrates through a fixing hole formed in the cross rod 3 on the upper part and corresponding to the pressure sensor 8, so that the movable direction of the pressure rod 2 is fixed;
in the preferred design, a guide rod 4 is designed on a fixed column on two sides of the fixed frame in parallel with a cross rod 3 on the upper part of the fixed frame, and a pressurizing rod 2 penetrates through the guide rod 4 after penetrating through the cross rod 3, so that possible swinging or displacement of the pressurizing rod 2 in the horizontal direction is avoided;
the weighing mechanism is similar to the prior conventional platform scale, namely comprises: a weighing table top 6 and a weighing display surface 7 for displaying the weighing result;
the weighing table top 6 is a flat surface, the pressure sensor 8 is connected with the weighing display surface 7 at the bottom of the table top, and the measuring result is displayed through the weighing display surface 7;
in a preferred design, the pressure sensor 8 is electrically connected with a power supply to realize power supply; the power supply preferably adopts a built-in storage type fixed power supply, or the electric control module can realize the random switching between the storage power supply and an alternating current power supply (the alternating current power supply realizes the power supply of the whole weighing mechanism through the socket 10);
the weighing display surface 7 is a digital display surface passing through a display screen, and the display screen and the voltage force sensor can adopt a common power supply as a power source.
In order to match weighing and display requirements of the electronic weighing mechanism, a power switch device, a weighing calibration module, a weighing unit switching module and the like can be further designed in the optimal design.
The pressure sensor 8 may specifically adopt, for example, a JHBM-H1 type planar weighing sensor, which can better satisfy the measurement requirements of the measuring instrument provided by the present application in terms of measurement range and precision, and takes a kino brand JHBM-H1 type planar weighing sensor product (with an outer diameter of 56mm and a height of 30 mm) made of stainless steel as an example, and the specific performance parameters thereof are shown in table 1.
TABLE 1 pressure sensor technical parameters
The weighing display surface 7 connected with the pressure sensor 8 is a display control instrument (some technical parameters are shown in the following table 2) of the model MCK-Z-I of kino, for example, and the instrument has good display and control effects.
TABLE 2 partial technical parameters of MCK-Z-I display controller
When a specific product is prepared, related parts are preferably made of stainless steel materials, so that the corrosion resistance is ensured to be certain on the basis of long service life; in terms of specific specifications, reference may be made to the design as follows:
a handle 1: length × width × height =272mm × 22mm × 22 mm;
the pressurizing rod 2: length × width × height =96mm × 22mm × 22 mm;
upper cross bar 3: length × width × height =263mm × 25mm × 22 mm;
the guide rod 4: length × width × height =263mm × 25mm × 22 mm;
a fixing frame 5: length × width × height =167mm × 25mm × 22 mm;
a weighing table top 6: length × width × height =272mm × 272mm × 22 mm;
tabletting 9: circular, 56mm outside diameter, 1.5mm thickness.
Example 2
The specific method of measuring the water content of raw meat is briefly described below, taking the specific electronic display type raw meat quality water content measuring instrument of example 1 as an example, and taking part of raw meat samples as an example.
(first) sample preparation
Taking the longissimus dorsi of the 3 rd to 4 th thoracic vertebra segments from the last to the last within 1 to 2 hours of stopping the breathing of the livestock, cutting meat slices with the thickness of about 1cm, and sampling the middle parts of the meat slices by using a phi 2.523 sampler to serve as samples to be detected.
(II) specific measurement
After the zero setting calibration of the tester, weighing and recording the weight of the meat sample before pressurization;
placing the meat sample wrapped by the water absorbing material on a pressure sensor, pressurizing the meat sample to a required pressure by adjusting a handle, and keeping the squeezing time;
the water absorbing material is conventional filter paper; during specific operation, in order to facilitate the operation, a raw meat sample is wrapped by gauze, and then conventional filter paper is wrapped outside the raw meat sample; generally speaking, for a square meat sample, two layers are respectively arranged above and below gauze, and the conventional filter paper can be set to be not less than 30 layers, so that the requirement of water absorption is met;
the final pressurizing pressure of the meat sample is 350N, and the pressure maintaining time is 5 min.
(III) calculation of water power
Removing the conventional filter paper and gauze wrapped outside the meat sample, weighing the meat sample again and recording data; at this time:
water loss (%) = [ (weight before meat sample press-weight after meat sample press)/weight before meat sample press ] × 100.
It should be noted that, in actual research, since it is not easy to clearly distinguish which is free water and which is bound water, in research and evaluation, the water loss rate of the obtained fresh meat sample is generally directly measured to represent the water loss rate (i.e., in the following examples, only the water loss rate is calculated, and no additional water loss rate is calculated).
Example 3
With the electronic display type raw meat quality water power measuring instrument in the embodiment 1 and the measuring method in the embodiment 2, furthermore, the inventor selects different livestock meat samples to carry out water power measurement, and in the measuring process, in order to determine suitable measuring conditions, the inventor sets different measuring parameters, and the specific process is briefly described as follows.
Experimental samples:
respectively selecting longissimus dorsi of pigs and cattle stopping breathing for 1-2 h as a detected meat sample, cutting meat slices with the thickness of about 1cm of the meat sample, and sampling the middle parts of the meat slices by using a phi 2.523 sampler as a detected sample;
the determination process and method are as follows:
after the zero setting calibration of the tester, weighing and recording the weight of the meat sample before pressurization, and recording the weight as W1;
then, the meat sample is placed between 2 layers of gauze, 18 layers of filter paper and a hard plastic plate are respectively arranged on the upper and the lower parts of the gauze, and the pressure is applied and kept for a certain time;
finally, taking out the pressed meat sample, removing the hard plastic plate, the filter paper and the gauze, weighing the weight of the pressed meat sample, and recording the weight W2 after pressing;
during the measurement, three parallel samples are measured in each meat sample, and the relative deviation between the measurement results of the two parallel samples is less than 5%, otherwise, the measurement is immediately carried out again.
Pressure and time determination
In order to determine the appropriate pressurization pressure and pressurization time, 250N, 300N, 350N, 400N and 450N of pressure are respectively applied during the measurement, and the pressurization time is respectively 1min, 2min, 3min, 4min, 5min, 6min and 7 min.
The specific results are shown in fig. 3 and 4. Analysis can see that: with the increase of the applied pressure and the applied pressure time, the water loss rate of the pork and the beef is measured to show an ascending trend and enters a plateau stage when the pressure is applied for 350N and the pressure is applied for 5min, so the pressure is applied for 350N when the water loss rate is measured, and the pressure is applied for 5min more typically.
(II) weight effect of meat sample sampling
Based on the above pressurizing pressure and pressurizing time (i.e. pressurizing 350N and pressurizing time 5 min), the inventors selected different sample weights to perform water loss rate measurement to examine the influence of the sample weight difference on the measurement result. Specific results are shown in table 3 below.
TABLE 3 determination of water loss for different sample weights
As can be seen from the results in the table above, the standard deviation of the water loss rate measurement results of pork and beef increases with the increase of the sampling amount; on the other hand, too large or too small a sample weight results in a significantly larger deviation of the result. In general, when the sample amount is 8g, the deviation of the measurement result from the average value is minimized, and thus, it is more representative to select a meat piece having a size of about 8 g.
(III) influence of different sample sites on the assay results
On the basis of the above results, in order to further examine the influence of different sampling sites of the meat sample on the water loss rate measurement results, the inventors selected different sites of the meat sample (leg muscles, longissimus dorsi, and pectoralis muscles) and performed the measurement with reference to the measurement method of the "influence of meat sample weight" (two) section (i.e., pressure application of 350N, pressure application time of 5min, and sample weight of 8 g), and the results are shown in table 4 below.
TABLE 4 measurement of water loss of meat samples at different sampling sites
As can be seen from the results in the above table, the fluctuation range of the measurement results of the water loss rate of the meat sample at different sampling positions is different, but generally, the standard deviation of the measurement results of the water loss rate of the longissimus dorsi is the smallest and the deviation of the measurement results from the mean value is the smallest for pork and beef, so that the selection of the longissimus dorsi is more representative in the measurement of the water loss rate.
(IV) stability of measurement results compared with conventional measurement methods
The meat samples of 8g of the longissimus dorsi of pork and beef were used as the measurement samples, and the measurement samples were used as the control, respectively, in the prior art (refer to the aforementioned measurement method, 35KG of briquettes and 5min of pressure application were used instead of 350N of pressure application and 5min of pressure application) and the measurement device of the present application (i.e., 350N of pressure application and 5min of pressure application), so as to examine the stability of the measurement results of the measurement device provided in the present application. The measurement results are shown in table 5 below.
TABLE 5 stability of measurement results of the measuring apparatus of the present application, compared with the prior art
As can be seen from the results in the table above, the standard deviation of the water loss rate of the sample measured by using the device is obviously lower than that of the traditional briquetting method, and the result shows that the measurement result of the device provided by the application has better stability.
Claims (6)
1. A portable raw meat quality system hydraulic tester is characterized in that the tester consists of a weighing mechanism and a pressurizing mechanism;
the pressurization mechanism is arranged on the surface of the weighing table top and comprises: the pressure sensor and the pressurizing device are fixedly arranged in the middle of the surface of the weighing table top; wherein the pressurizing device comprises: the tail end of the weighing platform is provided with a pressure rod of a pressure sheet and a fixing frame for fixing the pressure rod, wherein the pressure sheet is over against a pressure sensor arranged on the weighing platform;
the fixed frame is detachably and vertically fixed on the surface of the weighing table top, is in a Jiong-shaped structure and comprises fixed columns on two sides and a cross bar on the upper part, and the pressurizing rod penetrates through a fixed hole formed in the cross bar on the upper part and corresponds to the pressure sensor;
the weighing mechanism includes: the weighing platform comprises a weighing platform surface and a weighing display surface for displaying a weighing result;
the weighing table top is a flat surface, the pressure sensor is connected with the weighing display surface at the bottom of the table top, and the measuring result is displayed through the weighing display surface.
2. The portable raw meat quality hydraulic tester as claimed in claim 1, wherein the pressing rod is a screw lifting rod, and a handle is provided at an end of the pressing rod remote from the pressing plate.
3. The portable raw meat quality hydraulic tester as claimed in claim 1, wherein guide rods are provided on the fixing posts on both sides of the fixing frame parallel to the cross bar on the upper portion of the fixing frame, and the guide rods are inserted after the pressurizing rod passes through the cross bar.
4. The portable raw meat quality hydraulic tester as claimed in claim 1, wherein the pressure sensor is a jino brand stainless steel JHBM-H1 type plane weighing sensor; the weighing display surface is an MCK-Z-I type display control instrument of Jinnuo brand.
5. The portable raw meat quality hydraulic tester as claimed in claim 4, wherein the weighing display surface is a digital display surface provided with a display screen, and the display screen and the pressure sensor use a common power supply as a power source.
6. The portable raw meat quality system hydraulic power meter according to claim 5, wherein the power supply is a built-in storage type fixed power supply, or an electric control module is used to realize arbitrary switching between a storage power supply and an alternating current power supply.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112557246A (en) * | 2020-12-02 | 2021-03-26 | 河南农业大学 | Portable raw meat quality water-binding capacity tester and water-binding capacity testing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112557246A (en) * | 2020-12-02 | 2021-03-26 | 河南农业大学 | Portable raw meat quality water-binding capacity tester and water-binding capacity testing method |
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