KR100831331B1 - Apparatus for directly measuring salt level of cold or hot food - Google Patents

Abstract

An apparatus for measuring salinity of a food is provided to measure the salinity of a food to be measured, which is too hot or too cold to have a temperature of lower than 10 deg.C or higher than 40 deg.C, by modifying a temperature compensation coefficient in accordance with operation of a user. An apparatus for measuring salinity of a food comprises: a mode selection portion(120) selecting a salinity concentration measuring mode, a hot mode, and a cold mode in accordance with operation of a user; a microprocessor(160) which generates a measuring mode control signal, a hot mode control signal and a cold mode control signal respectively in accordance with the selection of the mode selection portion; an oscillating circuit portion(170) which generates an oscillation signal corresponding to each of the control signals of the microprocessor and outputs the signal; a salinity measuring portion(130) which measures the salinity of a sample by being synchronized with the oscillation signal outputted from the oscillating circuit portion and outputs a measured salinity detection signal; a level converting portion(140) which converts an alternating level of the salinity detection signal into a direct level; and a signal processing portion(150) converts the salinity detection signal outputted from the level converting portion into a comparison signal for measuring salinity, wherein the microprocessor converts present mode into the salinity measuring mode, calculates the salinity of the sample using the salinity measuring signal outputted from the signal treating portion and outputs the calculated salinity data to a display portion(190) when the salinity measuring mode is selected by the mode selection portion, and the microprocessor converts the present mode into the hot mode or the cold mode to modify a temperature correction coefficient and calculate the salinity of the sample by applying the modified temperature correction coefficient to a salinity calculation equation when the hot mode or the cold mode is selected by the mode selection portion. The apparatus further comprises a span compensation portion(180) which maintains the comparison signal for measuring salinity in accordance with the microprocessor control.

Description

Apparatus for directly measuring salt level of cold or hot food}

1 is a block diagram for explaining the configuration of the food salinity measuring apparatus according to the present invention.

FIG. 2 is a block diagram illustrating in more detail the configuration of the sample measuring unit and the level converting unit of FIG. 1.

3 is a view showing an embodiment of a ring type measuring device with a sample measuring unit and a temperature sensor according to the present invention;

Figure 4 is a view showing an embodiment of a dot type measuring device with a sample measuring unit and a temperature sensor according to the present invention

5 is a view showing an embodiment of a bar type measuring apparatus with a sample measuring unit and a temperature sensor according to the present invention;

*** Explanation of symbols on main parts of drawing ***

110: storage unit

120: mode selection unit

121: key input circuit

130: sample measuring unit

140: level conversion unit

150: signal processing unit

160: microprocessor

170: oscillation circuit

190: display unit

The present invention relates to a food salinity measuring device, and more particularly, when the temperature range of the food to be measured is too hot or cold outside the range of 10 to 40 ° C, the salinity of the food is changed by changing the temperature correction coefficient according to the user's operation. It relates to a food salinity measuring instrument that can be measured.

Salt is a compound of sodium and chlorine, called salt, and in the chemical name sodium chloride (NaCl). Salt is used as a seasoning to taste food in our lives, or it is used to store food. In addition, the salt is present in the body fluids to maintain the osmotic pressure, the amount of salt required by the human body depends on the amount of activity, climate and the like. Adults need 12 to 13 grams of salt per day, and excessive salt intake can cause adult illness, such as high blood pressure.

Therefore, devices for measuring salinity, which is the concentration of salinity, have been developed. The salinity measuring device developed for this purpose generally measures the temperature of a sample stored in a receiving part, and the temperature correction coefficient is changed according to the measured temperature. The salinity of the sample is accurately measured.

However, the food to be measured for salinity is too hot or cold, when the temperature is out of 10 ~ 40 ℃ there is a problem that the accuracy of measuring the salinity of the food falls. The measured salinity is not accurate because the temperature correction coefficient required for salinity measurement is usually calculated within 10-40 ° C.

The present invention has been made to solve the problems of the prior art as described above, the object of the present invention is that the temperature of the food to be measured is too hot or cold outside the temperature range of 10 ~ 40 ℃ according to the user's operation It is to provide a food salinity measuring instrument that can measure the salinity of the food by changing the correction coefficient.

Salinity measuring apparatus according to an embodiment of the present invention proposed to solve the above technical problem, the mode selection unit for selecting the salt concentration measurement mode, hot mode, cold mode according to the user's operation; A microprocessor for generating a control signal according to the selection of the mode selector; An oscillation circuit unit generating and outputting an oscillation signal under the control of a microprocessor; A salinity measuring unit for measuring salinity of the sample in synchronization with the oscillation signal output from the oscillation circuit unit and outputting the measured salinity detection signal; A level converting unit converting the AC level of the salinity detection signal output from the salinity measuring unit into a DC level; And a signal processor converting the salinity detection signal output from the level converter into a comparison signal for salinity measurement. The microprocessor converts the current mode to the salinity measurement mode when the salinity measurement mode is selected by the mode selection unit. By switching, the salinity of the sample is calculated using the salinity measurement signal output from the signal processing unit, and the calculated salinity data is output to the display unit. In addition, when the hot mode or the cold mode is selected by the selector, the microprocessor switches the current mode to the hot mode or the cold mode so that the temperature correction coefficient is changed. Application to calculate the salinity of the food. In addition, the salinity measuring apparatus of the present invention may further include a span compensation unit for converting the output level of the salinity comparison signal input to the microprocessor from the signal processor to a predetermined level.

Other objects and advantages of the present invention in addition to the above object will become apparent from the description of the preferred embodiment of the present invention with reference to the accompanying drawings.

Hereinafter, a food salinity measuring apparatus according to an embodiment of the present invention with reference to the accompanying drawings will be described in detail.

1 is a block diagram showing the configuration of a food salinity measuring apparatus according to an embodiment of the present invention. Referring to FIG. 1, the food salinity measuring apparatus of the present invention includes a mode selection unit 120 for selecting a salinity concentration measurement mode, a hot mode, a cold mode, and the like according to a user's operation. The mode selector 120 includes a key input circuit 121 for outputting a salt concentration measurement mode switch key signal according to a user's operation, a hot mode switch unit 122 for outputting a hot mode switch signal, and a cold mode switch. And a cold mode switching unit 124 for outputting a signal. In addition, the food salinity measuring apparatus of the present invention is a microprocessor 160 for generating a control signal according to the operation of the mode selection unit 120, and the oscillation circuit unit for generating and outputting an oscillation signal according to the control signal of the microprocessor 160 And a salinity measurement unit 130 for measuring the salinity of the sample in synchronization with the oscillation signal output from the oscillation circuit unit 170 and outputting the measured salinity detection signal and the salinity measurement unit 130. A level converting unit 140 converts the salinity detection signal of the AC level into a DC level, and a signal processing unit 150 converting the salinity detection signal output from the level converting unit 140 into a comparison signal for salinity measurement and outputting the result. It includes. In addition, the food salinity measuring apparatus of the present invention further includes a span compensation unit 180 for converting the output level of the salinity comparison signal supplied from the signal processor 150 to the microprocessor 160 to a predetermined level. In the above configuration, the microprocessor 160 switches the current mode to the salinity measurement mode in response to the salinity measurement mode selection signal input from the key input circuit unit 121, and transmits the salinity measurement signal input from the signal processor 150. The salinity of the sample is calculated, and the calculated salinity data is output to the display unit 190. In addition, when the hot mode or the cold mode is selected from the hot mode switching unit 122 or the cold mode switching unit 124, the microprocessor switches the current mode to the hot mode or the cold mode to change the temperature correction coefficient, and the salinity The calculated temperature correction coefficient is applied to the salinity calculation formula to calculate the salinity of the food.

FIG. 2 is a block diagram illustrating in detail the structures of the salinity measuring unit 130 and the level converting unit 140 applied to FIG. 1. Referring to FIG. 2, the salinity measuring unit 130 includes first and second electrodes 133a and 133b. In the salinity measurement unit 130, when the oscillation signal of a specific frequency generated from the oscillation circuit unit 170 is transmitted to the first electrode 133a in contact with the sample, the conductivity of the sample is changed, and the changed conductivity is the second electrode. Is detected by 133b. The level converting unit 140 includes an AC voltage detecting unit 140a for detecting a change in an AC voltage according to the conductivity detected by the second electrode 133b, and an AC voltage detected by the AC voltage detecting unit 140a. It includes a DC voltage converter 140b for converting to a voltage.

3 to 5 illustrate various embodiments of the salinity measuring unit 130 having a temperature sensor 137. FIG. 3 is a ring type salinity measuring unit 130a, and FIG. 4 is a dot type. 5 shows a salinity measuring unit 130b, and FIG. 5 shows a salinity measuring unit 130c of a bar type.

As shown in FIG. 3, the ring-type salinity measuring unit 130a includes an accommodating part 131a for accommodating a sample, a first electrode 133a installed at the center of the accommodating part 131a for accommodating the sample, The second electrode 135a is formed to be spaced apart from the first electrode 133a by a predetermined distance so as not to contact the first electrode 133a, and the temperature sensor 137a is installed on the first electrode 133a. In the embodiment of the present invention, the temperature sensor has been described as being installed in the first electrode 133a, but may be installed in the center of the second electrode 135a.

As shown in FIG. 4, the dot-type salinity measuring unit 130b includes an accommodating part 131b for accommodating a sample and a dot-shaped first electrode formed on one side of the accommodating part 131b for accommodating the sample. 133b, a dot-shaped second electrode 135b formed on the other side of the accommodating portion 131b, and spaced apart from the first electrode 133b so as not to contact the first electrode 133b, and the first electrode. It consists of the dot-shaped temperature sensor 137b provided in 133b. In the exemplary embodiment of the present invention, the temperature sensor is described as being installed on the first electrode 133b, but may be installed on the second electrode 135b.

As shown in FIG. 5, the bar type salinity measuring unit 130c is formed to be spaced apart from the first electrode 133c by a predetermined distance so as not to contact the bar type first electrode 133c and the first electrode 133c. A bar-shaped temperature sensor 137c, a first electrode 133c, and a second electrode 135c which are formed at a predetermined distance from the second electrode 137c, the first electrode 133c, and the second electrode 137c. And an exterior member 131c formed to surround the temperature sensor 137c, and the temperature sensor 137c protrudes outward from the exterior member 131c to facilitate contact with the sample.

In the salinity measuring unit 130a, 130b, 130c, the first electrode 133a, 133b, or 133c is in contact with a sample and an AC voltage signal of a specific frequency is input through the frequency generating unit 140. The second electrode 135a, 135b or 135c is in contact with the sample to measure the salinity of the sample. Meanwhile, the temperature sensor 137a, 137b or 137c is in direct contact with the sample and measures the temperature of the sample in real time. The temperature sensor 137a, 137b or 137c measures the temperature of the sample in real time. do. The temperature sensor 137a, 137b or 137c preferably uses a Pt 100Ω platinum temperature sensor to increase the accuracy of the temperature measurement. Using a platinum temperature sensor improves the reproducibility and instability of signals generated when using other materials, resulting in a stable signal. In addition, since the platinum temperature sensor is resistant to both acid and ancali, direct contact with the sample does not adversely affect the salinity measuring device itself, thereby increasing the reliability of the salinity measuring device and preventing deterioration. . The temperature sensor 137a, 137b or 137c converts the resistance change according to the temperature change into a voltage value and compensates the temperature of the sample using the converted voltage value.

Hereinafter, the operation of the food salinity measuring device configured as described above will be described.

First, when a user inserts a sample for measuring salinity into the receiving units 131a, 131b, and 131c and manipulates the key input circuit unit 120 of the mode conversion unit 120 to instruct the salinity measuring mode, the microprocessor 160 ) Recognizes this and outputs a control signal to the oscillation circuit unit 170.

Then, the oscillation circuit unit 170 generates an oscillation signal of a specific frequency in response to the control signal from the microprocessor 160 and outputs it to the salinity measurement unit 130. At this time, the frequency of the oscillation signal should be set to measure the salinity up to 15%.

The oscillation signal of a specific frequency generated from the oscillation circuit unit 170 is transmitted to the first electrode 133 of the sample measuring unit 130 in contact with the sample, the first electrode 133 is operated by the oscillation signal Change the conductivity of the sample.

The conductivity of the sample changed as described above is output through the second electrode 135 of the salinity measuring unit 130, and the AC voltage detecting unit 140a generates AC voltage generated through the second electrode 135 according to the salinity change. The change is detected and output to the DC voltage converter 140b, and the DC voltage converter 140b converts the AC voltage output from the AC voltage detector 140a into a DC voltage. The signal processor 150 converts the salinity detection signal output from the DC voltage converter 140b into a comparison signal for salinity measurement and outputs the converted signal.

Meanwhile, the temperature sensor 137 measures the temperature of the sample stored in the receiving parts 131a and 131b (see FIGS. 3 and 4) in real time so that the salinity of the sample can be accurately measured to reflect the change according to the temperature. The signal is output to the signal processor 150 through the level converter 140.

As described above, the salinity comparison comparison signal, which has been processed by the signal processing unit 150, is input to the microprocessor 160, and the microprocessor 160 receives the input salinity comparison signal and the reference salinity stored in the storage unit 110. The signal is compared and the result value according to the comparison result is displayed on the display unit 190 so that users can know the salinity of the sample.

On the other hand, the food salinity device according to the present invention may include a span correction unit 180. The span correction unit 180 is a means for the user to select and operate when the user determines that the measurement environment is drastically changed, such as when the temperature drops sharply or rises when the salinity of the sample is to be measured. The span correction unit 180 is to maintain the salinity comparison data input from the signal processing unit 150 to the microprocessor 160. When the span correction unit 180 is operated, the microprocessor 160 may advance in advance. The voltage is supplied to the span correction unit 180 for a set time, and the span correction unit 180 is operated only while power is supplied under the control of the microprocessor 160.

When the span correction unit 180 is operated as described above, the value is adjusted so that the salinity comparison data input from the signal processor 150 to the microprocessor 160 can be recognized by the microprocessor 160. Ensure that the salinity of the sample is accurately measured without being affected by the external environment.

Finally, when the user determines that the temperature of the food to be measured salinity is 10 ~ 40 ℃ outside the food temperature is low or high, the user is the hot mode switching unit 122 or cold mode of the mode conversion unit 120 By selecting the switching unit 124 to measure the salinity of the food in the state of switching the current mode to hot mode or cold mode.

That is, when the temperature of the food to measure salinity is high, the user selects the hot mode switching unit 122 after storing the sample, which is the food to measure salinity, in the receiving unit. Then, the microprocessor 160 converts the current mode into the hot mode switching mode, reads the temperature correction coefficient set during the hot mode, and outputs a control signal for generating the oscillation signal to the oscillation circuit unit 170.

Then, the oscillation circuit unit 170 generates an oscillation signal of a specific frequency in response to the oscillation signal generation control signal and outputs it to the salinity measurement unit 130, and the oscillation signal of a specific frequency generated from the oscillation circuit unit 170 is a sample. The salinity measuring unit 130 is brought into contact with the first electrode 133, and the first electrode 133 is operated by an oscillation signal to change the conductivity of the sample.

The conductivity of the sample changed as described above is output through the second electrode 135 of the salinity measuring unit 130, and the AC voltage sensing unit 140a is generated through the second electrode 135 according to the salinity change. The AC voltage change is detected and output to the DC voltage converter 140b. The DC voltage converter 140b converts the AC voltage output from the AC voltage detector 140a into a DC voltage. The signal processor 150 outputs the salinity comparison signal using the salinity detection signal of the DC level output from the level converter 140.

As described above, the salinity comparison comparison signal, which has been processed by the signal processor 150, is input to the microprocessor 160, and the microprocessor 160 receives the input salinity comparison signal and the hot read from the storage 110. By using the temperature correction coefficient in the mode, the salinity of the food is calculated, and the calculation result is displayed on the display unit 190 so that users can know the salinity of the sample.

On the other hand, when the temperature of the food to measure the salinity is too low, the user presses the cold mode switching unit 124 unlike the above case, the microprocessor 160 converts the current mode to the cold mode after the salinity of the food Allow me to measure. Since the process is the same as in the hot mode, a detailed description thereof will be omitted.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

The present invention having the configuration and operation and the preferred embodiment as described above is the salinity of the food by changing the temperature correction coefficient in accordance with the user's operation when the temperature range of the food to be measured is too hot or cold outside the 10 ~ 40 ℃ It has the effect of making it possible to measure.

Claims (4)

In the food salinity measuring apparatus, A mode selection unit for selecting a salt concentration measurement mode, a hot mode, or a cold mode according to a user's operation; A microprocessor for generating a measurement mode control signal, a hot mode control signal, and a cold mode control signal, respectively, according to selection of the mode selector; An oscillation circuit unit for generating and outputting oscillation signals corresponding to each control signal of the microprocessor; A salinity measuring unit for measuring salinity of a sample in synchronization with an oscillation signal output from the oscillation circuit unit and outputting a measured salinity detection signal; A level converting unit converting an AC level of the salinity detection signal output from the salinity measuring unit into a DC level; A signal processor converting the salinity detection signal of the DC level output from the level converter into a salinity measurement comparison signal and outputting the converted signal; When the salinity measurement mode is selected by the mode selector, the microprocessor switches the current mode to the salinity measurement mode, calculates the salinity of the sample using the salinity measurement signal output from the signal processor, and calculates the salinity data. Is displayed on the display unit, and if the hot mode or the cold mode is selected by the mode selection unit, the current mode is switched to the hot mode or the cold mode so that the temperature correction coefficient is changed, and when the salinity calculation is performed, the temperature correction coefficient is calculated. Food salinity measuring apparatus characterized by calculating the salinity of the sample by applying to a formula. According to claim 1, The salinity measuring unit, A first electrode which senses an alternating voltage output from the oscillation circuit unit and is in contact with a sample, a second electrode which is installed spaced apart from the first electrode, and which measures salinity of the sample in contact with the sample, and the first electrode Food salinity measuring device is installed on any one of the electrode and the second electrode comprising a temperature sensor for measuring the temperature of the sample in real time for accurate temperature correction of the sample. The method of claim 2, The temperature sensor is a sample measuring device, characterized in that the platinum sensor of Pt 100Ω. The method of claim 1, And a span correction unit for maintaining a constant salinity measurement comparison signal output from the signal detection unit under the control of the microprocessor.

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