JP4970519B2 - Electronic salinity meter - Google Patents

Description

  The present invention relates to an electronic salinity meter, and more specifically, an electronic device capable of accurately estimating the temperature of an object to be measured by accurately estimating the temperature of an object to be measured while removing various buttons, making it easy to use and completely waterproofing. It relates to a formula salinity meter.

  With the recent increase in public interest in well-being and health, it has become clear that salty foods are one of the main causes of high blood pressure, and interest in salinometers that measure the salinity in foods. Has increased.

  As a method for measuring the salinity of a measurement object such as food or seawater, an electrical conductivity method utilizing the fact that the electric conductivity varies depending on the amount of salt contained in the measurement object, and a measurement object There has been known a reflectometer method that utilizes the principle that light refraction varies depending on the amount of salt contained in an object.

  The electrical conductivity method is a method for measuring the conductivity of ionized salt (electrolyte) dissolved in a measurement object using the magnitude of the current flowing between two electrodes. Further, it is known that the salinity is affected by the temperature, and if there is a temperature change of 1 ° C., the salinity changes by about 2%.

  Therefore, in order to accurately measure the salinity, it is very important to accurately measure the temperature, and in order to avoid user confusion, the salinity of the measurement object is the salt at room temperature (25 ° C). It is said that it is preferable to display it in a unit of degree (unit:% or ppt), and it is necessary to convert the salinity measured at a temperature other than normal temperature into the salinity at normal temperature and display it.

  Since the salinity varies depending on the temperature, it is very important to accurately measure the actual temperature of the measurement object when measuring the salinity of the measurement object in order to measure the correct salinity.

  However, the conventional electronic salinity meter that measures salinity using the electrical conductivity method cannot accurately measure the salinity of hot juice, and can accurately measure the actual temperature during salinity measurement. There is a problem that the accuracy of the measured salinity is lowered because it is not possible.

  In addition, the conventional electronic salinity meter has an operation button for switching the power source and controlling the measurement, so that it is inconvenient to use, and it is difficult to make the measurement unit completely waterproof.

  The present invention has been proposed in order to solve the above problems, and the object of the present invention is to measure in advance the relationship between the measured temperature and the actual temperature during a predetermined time after the start of measurement. It is an object of the present invention to provide an electronic salinometer capable of accurately measuring salinity within a short time by correcting the measured temperature to the actual temperature of the measurement object.

  Another object of the present invention is to follow the temperature change sensed by the temperature sensor and, when the temperature change falls below a threshold, estimate that the thermal equilibrium state has been reached and display this. Another object of the present invention is to provide an electronic salinity meter with improved accuracy by measuring temperature and salinity.

  Still another object of the present invention is to constantly monitor whether or not the measurement is being performed while operating in the power saving mode, and when contact with the measurement object is detected, the power is automatically turned on and the normal mode is set. By making it operate, an object is to provide an electronic salinity meter which is easy to use and completely waterproof since the power button and the measurement button are removed.

  In order to achieve the above-described object, the electronic salinity meter of the present invention senses the temperature of a measurement object built in any one sensor pin and a pair of sensor pins for applying power to the measurement object. A temperature sensor for measuring the salinity of the measurement object by applying an AC power supply to the sensor pin and measuring the salinity of the measurement object by an electrical conductivity method, and applying a power supply to the temperature sensor A temperature measuring unit for measuring the temperature, and a temperature for compensating the temperature measured by the temperature measuring unit according to a control signal by a predetermined temperature correction table to the actual temperature of the measurement object A correction unit, a temperature corrected by the temperature correction unit according to a control signal, a normal temperature salinity conversion unit that converts a measured value of the salinity measurement unit into a normal salinity value, and receives a user's operation input Button operation for When the automatic measurement is input through the button, the display unit for displaying the temperature and the normal temperature salinity, and the button operation unit, the sensor pin monitors whether the sensor pin is conductive. A built-in timer is activated when the measurement object becomes conductive, and when the built-in timer reaches a set time, the temperature measurement unit and the salinity measurement unit are controlled to measure temperature and salinity, and the temperature correction is performed. A control unit for controlling the unit and the room temperature salinity conversion unit to receive a salinity value at room temperature from the room temperature salinity conversion unit and displaying the temperature and the room temperature salinity on the display unit; It is comprised from these.

  In order to achieve the above object, another electronic salinity meter of the present invention includes a pair of sensor pins for applying power to a measurement object and the temperature of the measurement object incorporated in any one sensor pin. A temperature sensor for sensing; a salinity measuring unit for measuring the salinity of an object to be measured by an electrical conductivity method by applying an AC power supply to the sensor pin; and a measurement object by applying a power to the temperature sensor. A temperature measurement unit for measuring the temperature of an object and a temperature value preliminarily measured by the temperature measurement unit at a predetermined time interval after the start of measurement according to a control signal are stored, and the current temperature is compared with the previous temperature. After determining the temperature change amount, when the temperature change amount becomes a predetermined threshold value or less, it is determined that the thermal equilibrium state has been reached, and the thermal balance instructing the salinity measurement unit and the temperature measurement unit to perform actual measurement. Detection unit and temperature measurement unit To display the temperature and salinity, a normal temperature salinity conversion unit that converts the salinity value of the measurement temperature and the salinity measurement unit into a normal salinity value, a button operation unit for receiving user operation input, and When the automatic measurement is input via the display unit and the button operation unit, the sensor pin monitors whether the sensor pin is conductive, and when the sensor pin becomes conductive by the measurement object, the thermal equilibrium detection unit And a control unit that controls to receive the salinity value at room temperature from the room temperature salinity conversion unit and display the temperature and salinity on the display unit when the thermal equilibrium state is reached. It is characterized by.

  The electronic salinity meter according to the present invention predicts the relationship between the measured temperature and the actual temperature for a predetermined time after the start of measurement, and corrects the measured temperature to the actual temperature of the object to be measured within a short time. Can measure salinity accurately.

  The electronic salinity meter according to the present invention follows the temperature change sensed by the temperature sensor and, when the temperature change falls below a threshold value, estimates that the thermal equilibrium state has been reached and displays this and displays the temperature. The accuracy can be improved by measuring the salinity.

  Furthermore, the electronic salinity meter according to the present invention automatically performs measurement by removing all the buttons for operation and then automatically turning on the power when the measurement object is inserted. Since this is notified by vibration when it is finished, it is very convenient to use, and it is easy to make the measurement part completely waterproof.

It is the perspective view which showed the spoon type | mold electronic salinity meter by this invention. It is a use state figure of the spoon type electronic salinity meter by the present invention. It is a separation perspective view of a spoon type electronic salinity meter according to the present invention. 1 is a configuration block diagram of an electronic salinity meter according to a first embodiment of the present invention. It is the figure which illustrated the LCD display screen of the electronic salinity meter by 1st Embodiment of this invention. It is the flowchart which showed the operation | movement procedure of the electronic salinity meter by 1st Embodiment of this invention. It is a figure for demonstrating operation | movement of the electronic salinity meter by 1st Embodiment of this invention. It is a block diagram of the configuration of an electronic salinity meter according to a second embodiment of the present invention. It is the flowchart which showed the operation | movement procedure of the electronic salinity meter by 2nd Embodiment of this invention. It is a figure for demonstrating operation | movement of the electronic salinity meter by 2nd Embodiment of this invention. It is the perspective view which showed the rod-type electronic salinity meter by this invention. It is a use condition figure of the bar type electronic salinity meter by the present invention. It is a block diagram of the configuration of an electronic salinity meter according to a third embodiment of the present invention. It is the flowchart which showed the operation | movement procedure of the electronic salinity meter by 3rd Embodiment of this invention. It is a block diagram of the configuration of an electronic salinity meter according to a fourth embodiment of the present invention. It is the flowchart which showed the operation | movement procedure of the electronic salinity meter by 4th Embodiment of this invention.

  The technical problems achieved by the present invention and the practice of the present invention will become clearer by the preferred embodiments of the present invention described below. The following embodiments are merely examples for explaining the present invention and are not intended to limit the scope of the present invention.

  First, the electronic salinity meter of the present invention can be classified into a spoon type and a rod (needle) type according to the shape of the measuring part, and can be classified into a predetermined time measurement method and a thermal equilibrium sensing measurement method according to a salinity measurement method. It is possible to classify the button structure type that uses the power on / off button according to the power control method and the buttonless automatic on type with the button removed by automatically turning the power on when sensing the measurement. it can. The automatic ON function without a button can be applied to the case where the shape of the measurement unit is a spoon type or a rod type, but in order to avoid repetition, in the embodiment of the present invention, the measurement unit In the case of a spoon type, a button structure will be described as an example, and in the case of a bar type, a buttonless structure will be described as an example.

  In the embodiment of the present invention, the first embodiment has a button and the shape of the measuring part is a spoon type and performs measurement for a predetermined time, and the second embodiment has a button and has a measuring part. In the third embodiment, the shape of the measuring part having no button (no button) is a rod type and is measured for a predetermined time. In the fourth embodiment, the shape of the measurement unit that does not have a button (no button) is a bar type and senses and measures thermal equilibrium.

[First Embodiment]
FIG. 1 is a perspective view showing a spoon type electronic salinity meter according to the present invention, FIG. 2 is a use state diagram of the spoon type electronic salinity meter according to the present invention, and FIG. 3 is a spoon type electronic salinity meter according to the present invention. It is a separate perspective view of a meter.

  As shown in FIGS. 1 to 3, a spoon-type electronic salinity meter 100 according to the present invention has a measurement container 10 capable of scooping a measurement object (40 in FIG. 2), and a measurement contained in the measurement container 10. A main body 20 that measures the temperature and salinity of an object and displays the salinity at normal temperature, and the measurement container 10 and the main body 20 are screwed together by a ring holder 30 and loosened the ring holder 30 It is formed so that it can be separated from each other.

  The measuring container 10 has a spoon 12 whose one end of the support 11 can scoop up the measuring object 40, and a pair of sensor pins 13 for detecting salinity and temperature project from the bottom of the spoon 12. An electric wire (not shown) can be connected to the connecting pin 26 of the main body 20 via the connector 16 inside the support base 11. A coupling portion 14 for coupling to the main body 20 is formed at the other end portion of the support base 11, and the ring holder 30 is sandwiched between the support base 11 between the spoon 12 and the coupling portion 14 so as to be movable back and forth. The ring holder 30 is prevented from being removed by the jaw portion 17 of the coupling portion. Such a measurement container 10 can be manufactured from a plastic injection product or the like.

  The main body 20 has an LCD display unit 22 and a button operation unit 23 attached to a cylindrical case 21 that is vacant so that a printed circuit board (PCB), a battery, and the like can be stored. A screw thread 21a for coupling with the ring holder 30 is formed, and a dry battery cap 24 having a ring for attaching accessories is coupled to the other end. In addition, guides 25a and 25b corresponding to the guide grooves 15a and 15b of the measurement container are formed inside the case 21, so that the connector 16 of the measurement container and the connecting pin 26 of the main body can be accurately coupled.

  FIG. 4 is a block diagram showing the configuration of the electronic salinity meter according to the first embodiment of the present invention. FIG. 5 is a diagram illustrating an LCD display screen of the electronic salinity meter according to the first embodiment of the present invention.

  As shown in FIG. 4, the electronic salinity meter 100 according to the first embodiment of the present invention has a pair of sensor pins 13 positioned on the spoon 12 of the measurement container 10 connected to the main body 20 via a connector 16. Any one of the sensor pins 13 is mounted with a thermistor (NTC) 18 for sensing the amount of heat of the measurement object. As shown in FIG. 4, the electrical configuration of the main body 20 includes a battery 102, a power supply unit 104, a temperature measurement unit 106, a temperature correction unit 108, a salinity measurement unit 110, a normal temperature salinity conversion unit 112, a control unit 114, The memory 116, the LCD driving unit 118, the LCD 120, and the button operation unit 22 are included. Here, the button operation unit 22 includes a power on / off (ON / OFF) button 22a, an automatic (Auto) button 22b, and a temperature (TEMP) button 22c. The unit, the room temperature salinity conversion unit, the temperature correction unit, the control unit, the memory, and the LCD driving unit may be a single micro control unit microcomputer (MCU) having a flash memory and an LCD driving unit.

  As shown in FIG. 4, the sensor pin 13 is made of a metal having good conductivity and thermal conductivity, such as copper plated with platinum, and has a structure capable of quickly transferring heat to the built-in thermistor 18. Yes. The sensor pin 13 is an electrode connected to the salinity measuring unit 110, and can transmit the AC voltage applied by the salinity measuring unit 110 to the measuring object 40 to measure the salinity of the measuring object by an electrical conductivity method. . The reason why the AC voltage is used for the salinity measurement is to prevent the electrode from corroding when the DC voltage is used.

  The thermistor 18 is an element whose resistance value changes depending on the temperature. There are NTC and PTC, but the temperature sensor is mainly NTC plated with platinum, and is connected to the temperature measuring unit 106 to connect the sensor pin 13. The temperature of the measurement object transmitted through the sensor is sensed.

  The power supply unit 104 stabilizes the power input from the battery 102 in accordance with the power supply (PWR) on / off control signal of the control unit 114 and supplies the Vcc voltage to the circuit element, and the measurement on / off signal of the control unit 114 In response, the MVcc voltage is supplied to the salinity measuring unit 110.

  The temperature measuring unit 106 detects the current flowing using the thermistor 18 when a predetermined time has elapsed (for example, 10 seconds) with reference to the time when the measurement is disclosed by the conduction of the sensor pin 13, thereby measuring the temperature of the measurement object. The temperature correction unit 108 corrects the temperature measured by the temperature measurement unit 106 to the actual temperature using a temperature correction table as shown in Table 1 below.

  The temperature correction table as shown in Table 1 is measured when a predetermined time (for example, 10 seconds) elapses after the measurement object is scooped with the spoon 12 of the measurement container while the temperature of the measurement container 10 is normal. The data of temperature and actual temperature are obtained and tabulated. At this time, even when the same measurement object is used, the temperature at the time when 10 seconds have elapsed may vary depending on the temperature of the measurement container 10 at the start of measurement. Therefore, the temperature of the measurement container 10 at the start of measurement is as room temperature as possible. It is preferable to be close. Therefore, when the electronic salinity meter according to the present invention is used a plurality of times, it is necessary to wash the measuring container 10 with tap water and bring the temperature of the measuring container 10 close to room temperature before starting the next measurement.

  The salinity measuring unit 110 includes an oscillation circuit for converting the MVcc power source into an AC power source and applying an AC voltage to the sensor pin 13, and the measurement object from the current flowing through the sensor pin 13 via the measurement object. The salinity of the measurement object is measured by an electrical conductivity method for calculating the conductivity of the sample, and the normal temperature salinity conversion unit 112 measures the actual temperature of the measurement object corrected by the temperature correction unit 108 and the salinity measurement unit 110. The obtained salinity is converted into a salinity value at room temperature using a predetermined conversion formula or table.

  The memory 116 includes a flash memory in which software is stored, an SRAM for storing data, an EEPROM for storing table values, and the like. The control unit 114 executes the software stored in the memory 116 to execute the button operation unit 22. When the power button 22a is turned on, the power supply unit 104 is controlled to supply the Vcc power, and when the automatic button 22b is turned on, the MVcc voltage is supplied to measure through the salinity measuring unit 110. It is monitored whether or not the two sensor pins 13 are electrically connected to each other by an object. When the sensor pins 13 become conductive, the temperature measuring unit 106 and the salinity measuring unit 110 To control temperature and salinity. Then, the salinity value at room temperature input from the room temperature salinity conversion unit 112 is displayed on the LCD 120 via the LCD driving unit 118.

  As shown in FIG. 5, the LCD 120 is capable of displaying the operating state of Auto, Hold, low battery, etc., units such as%, ° C., numbers such as temperature and salinity, etc. according to the driving of the LCD driving unit 118. .

  FIG. 6 is a flowchart showing an operation procedure of the electronic salinity meter 100 according to the first embodiment of the present invention.

  As shown in FIG. 6, when the power button 22a is turned on, the control unit 114 controls the power supply unit 104 to supply the Vcc voltage so that each element performs an initial operation and displays the LCD screen. Turn on (S101, S102). Next, when the automatic button 22b is turned on, the control unit 114 blinks the word “Auto” on the LCD to indicate that it is in an automatic measurement state and controls the power supply unit 104 to output the MVcc power supply. Then, it is monitored whether or not the sensor pin 13 is conducted through the salinity measuring unit 110 (S103 to S106).

  When the sensor pin 13 is turned on by inserting the measurement object, the control unit 114 operates the built-in timer to count the time, and when a predetermined set time (for example, 10 seconds) elapses, the temperature measurement unit 106 and the salt The degree measuring unit 110 is caused to measure the temperature and salinity of the measurement object (S107 to S108). Then, the HOLD state is displayed to indicate that the measurement is completed, the measured temperature is corrected to the actual temperature by the temperature correction table, and the actual temperature and the measured salinity are changed to the salinity value at normal temperature. Conversion is performed (S110 to S112). Then, the salinity value at room temperature is displayed on the LCD 120, and when a predetermined time (for example, 5 minutes) has elapsed since the power was turned on, the power is automatically turned off to prevent battery consumption ( S113 to S115).

  On the other hand, when the measuring container 10 is put into the measuring object 40 in a state where the automatic button 22b is not turned on, the temperature actually transmitted to the sensor can be compensated for, not the correction table, and the measurement can be performed. When input, the measured temperature is displayed on the LCD 120.

  FIG. 7 is a diagram for explaining the operation of the electronic salinity meter according to the first embodiment of the present invention.

  As shown in FIG. 7, when the user presses the power button 22a of the button operation unit at time t1 and the power is turned on, the power source 104 outputs the Vcc voltage to operate the circuit element, and the automatic button is activated at time t2. When 22b is pressed, the power supply unit 104 outputs the MVcc voltage to operate the salinity measuring unit 110, whereby the salinity measuring unit 110 constantly monitors the sensor pin 13, and the measurement object is put into the measuring container 10 at time t3. Then, the sensor pin 13 becomes conductive, and the timer counts time. At this time, when a high-temperature measurement object is put into the measurement container 10, the temperature of the measurement container increases rapidly from the normal temperature state as can be seen from the temperature graph, and the salinity is measured at t4 time when the timer counts 10 seconds. Unit 110 and temperature measurement unit 106 actually measure the salinity and temperature of the measurement object. Then, the temperature measured by the temperature measurement unit 106 is corrected by the temperature correction table, and the salinity value of the actual temperature is converted into the salinity value at normal temperature and displayed on the LCD 120 at the normal salinity.

[Second Embodiment]
FIG. 8 is a block diagram showing the configuration of an electronic salinity meter according to the second embodiment of the present invention.

  As shown in FIG. 8, the electronic salinity meter 200 according to the second embodiment of the present invention is that the temperature correction unit 106 of the first embodiment is changed to a thermal equilibrium detection unit 210 in the second embodiment. Except for this, the other configurations are the same, so the differences will be mainly described in order to avoid duplication. The electronic salinity meter 200 of the second embodiment does not count the time using a timer as in the first embodiment, and the real-time temperature measured by the temperature measurement unit 106 after the measurement starts is detected as a thermal equilibrium detection unit. After 210 receives and calculates the temperature change amount, when the temperature change amount ΔT is less than or equal to a predetermined threshold value ΔTcut, it is determined that the temperature has reached the thermal equilibrium state where the temperature of the temperature sensor is the same as the measured object. It measures actual temperature and salinity.

  As shown in FIG. 8, when the power button 22 a is turned on and the automatic button 22 b is turned on, the control unit 114 controls the power supply unit 104 to output the MVcc voltage, and the salinity measurement unit 110 is connected between the sensor pins 13. Monitor continuity. When the sensor pin 13 becomes conductive due to the input of the measurement object, the thermal equilibrium detection unit 210 measures the temperature of the measurement object via the temperature measurement unit 106 and then compares the temperature change amount ΔT with the previous measurement temperature. calculate. When the temperature change amount ΔT gradually decreases to a predetermined threshold value ΔTcut or less, the thermal equilibrium detection unit 210 determines that the thermal equilibrium state is present, and causes the temperature measurement unit 106 and the salinity measurement unit 110 to transmit temperature and salt. Let each measure the degree. The measured temperature and salinity are converted into a salinity value at normal temperature by the normal temperature salinity conversion unit 112 and then displayed on the LCD 120 as normal salinity.

  FIG. 9 is a flowchart showing an operation procedure of the electronic salinity meter 200 according to the second embodiment of the present invention.

  As shown in FIG. 9, when the power button 22a is turned on, the control unit 114 controls the power supply unit 104 to supply the Vcc voltage to cause each element to perform an initial operation and turn on the LCD screen. (S201, S202). Next, when the automatic button 22b is turned on, the control unit 114 blinks the word “Auto” on the LCD to display the automatic measurement state and outputs the MVcc power to the power supply unit 104, and then the salinity measurement unit 110. It is monitored whether or not the measurement object is inserted through the sensor pin 13 and the sensor pin 13 is conductive (S203 to S205).

  When the sensor pin 13 becomes conductive, the temperature is measured via the temperature measurement unit 106, and the thermal equilibrium detection unit 210 stores the temperature measured by the temperature measurement unit 106, and then the temperature change amount Δ compared to the previous temperature. T is calculated (S206, S207).

  Then, when the calculated temperature change ΔT is compared with a predetermined threshold ΔTcut and falls below the threshold, the temperature measuring unit 106 and the salinity measuring unit 110 measure the temperature and salinity of the measurement object. (S208, S208). And it displays that it is a HOLD state, displays that the measurement was complete | finished, and converts measured temperature and measured salinity into the salinity value in normal temperature (S210, S211). Then, the salinity value at room temperature is displayed on the LCD, and when a predetermined time (for example, 5 minutes) has passed since the power was turned on, the power is automatically turned off to prevent battery consumption ( S212 to S214).

  FIG. 10 is a diagram for explaining the operation of the electronic salinity meter according to the second embodiment of the present invention.

  As shown in FIG. 10, when the user presses the power button 22a of the button operation unit 22 at time t1 to turn on the power, the power source unit 104 outputs a Vcc voltage to operate the circuit element, and automatically at time t2. When the button 22b is pressed, the power supply unit 104 outputs the MVcc voltage to operate the salinity measurement unit 110, whereby the salinity measurement unit 110 constantly monitors the sensor pin 13, and the measurement object is present in the measurement container 10 at time t3. When the sensor pin 13 is turned on, the sensor pin 13 becomes conductive, and the thermal equilibrium detection unit 210 stores the temperature measured by the temperature measurement unit 106, and then compares the current measurement temperature with the previous measurement temperature to calculate the temperature change ΔT. calculate.

  Then, the thermal equilibrium detection unit 210 compares the calculated temperature change amount ΔT with the threshold value ΔTcut, and determines that the thermal equilibrium state is reached when the temperature change amount becomes equal to or less than the threshold value. 110 and the temperature measurement unit 106 actually measure the salinity and temperature of the measurement object. At this time, the time required to reach thermal equilibrium differs depending on the temperature of the measurement object and the temperature of the measurement container at the start of measurement. The salinity value at the actual temperature is converted into a salinity value at normal temperature and displayed on the LCD 120 at the normal salinity.

[Third Embodiment]
FIG. 11 is a perspective view showing a rod-type electronic salinity meter according to the present invention, and FIG. 12 is a use state diagram of the rod-type electronic salinity meter according to the present invention.

  As shown in FIGS. 11 and 12, the electronic salinity meter 300 according to the present invention measures the temperature and salinity of a measurement object using the measurement bar 310 and the measurement bar 310 that can be inserted into the measurement object. The measuring bar 310 and the main body 320 are integrally coupled.

  The measurement bar 310 has a first sensor pin 313a protruding at the tip, and the second sensor pin 313b is arranged in front and rear with an insulator 319 interposed therebetween to constitute an electrode for measuring salinity. A temperature sensor 318 for sensing temperature is built in 313a, and thermal cream is filled between the temperature sensor 318 and the sensor pin 313a to activate heat transfer.

  In the main body 320, a display unit 322 is attached to a rectangular cylindrical case 321 in which a printed circuit board and a battery can be stored, and a dry battery cap 324 is coupled to an end of the case 321. . The bar-type electronic salinity meter 300 employs an automatic on function, and all buttons are removed for power operation and measurement.

  FIG. 13 is a block diagram showing the configuration of an electronic salinity meter according to the third embodiment of the present invention.

  As shown in FIG. 13, after the same reference numerals are given to the same components as those in the first embodiment, further explanation is omitted to avoid repetition, and the differences from the first embodiment are described. The explanation will be centered.

  In the third embodiment, the measurement monitoring unit 330 for monitoring the start of measurement instead of the spoon type measurement container 10 of the first embodiment being changed to the bar type measurement bar 310 and the button operation unit 22 being removed. The power supply unit 304 normally outputs power while operating in the power saving mode. When measurement is started, the measurement power supply is output to operate all circuit elements normally and measure salinity and temperature. It is what I did. That is, in the third embodiment of the present invention, the measurement monitoring unit 330 monitors whether or not the sensor pins 313a and 313b are conducting in the power saving mode, and the measurement bar 310 comes into contact with the measurement object and the two When the sensor pins 313a and 313b are in a conductive state, this is sensed and the control unit 314 is notified of the start of measurement, whereby the control unit 314 controls the power supply unit 304 to output a measurement power supply and perform actual measurement. Is called. During measurement, “Measurement in progress” is displayed on the LCD 120. At the end of measurement, the measurement value is displayed on the LCD 120 according to the control of the control unit 314, and the vibration unit 340 is vibrated to end the measurement by vibration to the user. Recognize

  In the measurement bar 310 of the electronic salinometer 300 according to the third embodiment, the first sensor pin 313a and the second sensor pin 313b are arranged in front and back with an insulator 319 interposed therebetween, and the first sensor pin 313a at the tip senses temperature. A temperature sensor 318 is built in.

  In the third embodiment, the output of the power supply unit 304 is divided into a constant power supply and a measurement power supply. In the power saving mode, only the constant power supply is output, but when the measurement is detected, the control of the control unit 314 (measurement on) is performed. In response, the measurement power supply is output. The constant power source is a power source that is applied to the minimum elements that need to operate in the power saving mode and that minimizes current consumption (for example, about 10 μA or less), and the measurement power source operates the entire circuit elements normally. It is a power source that enables the salinity and temperature of the measurement object to be measured with the power source. When the measurement power supply is turned on and the measurement is completed and a predetermined time has elapsed, the power supply unit 304 automatically outputs only the power supply according to the control signal and operates in the power saving mode.

  FIG. 14 is a flowchart showing an operation procedure of the electronic salinity meter 100 according to the third embodiment of the present invention.

  As shown in FIG. 14, the electronic salinity meter 300 of the third embodiment does not have a separate button, so that a constant power supply for the power saving mode is output except for the time for inserting the battery. The measurement monitoring unit 330 that is always operated by the power supply monitors whether or not the two sensor pins 313a and 313b are conducting (S301 and S302).

  When the measurement bar 310 is inserted into the object to be measured and the sensor pins 313a and 313b are turned on, the control unit 314 operates the built-in timer to count the time and displays that the measurement is being performed on the LCD 120 (S303, S304). .

  Then, when a predetermined set time (for example, 4 seconds) elapses, the temperature measurement unit 106 and the salinity measurement unit 110 are caused to measure the temperature and the salinity of the measurement object (S305, S306). Next, the measured temperature is corrected to the actual temperature by the temperature correction table, and the actual temperature and the measured salinity are converted to the salinity value at normal temperature (S307, S308). Then, the salinity value at normal temperature is displayed on the LCD 120 and the user is notified of the end of the measurement by vibration. When a predetermined time (for example, 5 minutes) elapses after the power is turned on, battery consumption is prevented. Therefore, the measurement power supply is automatically turned off (S309 to S311). At this time, it is preferable that the vibration vibrate only for several seconds in order to suppress battery consumption.

[Fourth embodiment]
FIG. 15 is a block diagram showing the configuration of an electronic salinity meter according to the fourth embodiment of the present invention.

  As shown in FIG. 15, the same components as those in the second embodiment are denoted by the same reference numerals, and further description is omitted to avoid repetition, and differences from the second embodiment are described. The explanation will be centered.

  In the fourth embodiment, the spoon-type measurement container 10 of the second embodiment is changed to a bar-type measurement bar 310, and instead of the button operation unit 22 being removed, a measurement monitoring unit 430 for monitoring the start of measurement is provided. The power supply 404 normally outputs power while operating in the power saving mode, but when measurement is started, the measurement power is output and all circuit elements operate normally to measure salinity and temperature. It is made to let you. That is, in the fourth embodiment of the present invention, the measurement monitoring unit 430 monitors whether or not the sensor pins 413a and 413b are in conduction in the power saving mode, and the measurement bar 310 is inserted into the measurement object and the sensor pin 313a. When 313b becomes conductive, this is sensed and the control unit 414 is notified of the start of measurement, whereby the control unit 414 controls the power source unit 404 to output the measurement power source and perform actual measurement.

  During measurement, the LCD 120 displays “measuring”. When the measurement is finished, the measurement value is displayed on the LCD 120 according to the control of the control unit 414 and the vibration unit 440 is vibrated to end the measurement to the user by vibration. Recognize

  In the measurement bar 310 of the electronic salinometer 400 according to the fourth embodiment, a first sensor pin 413a and a second sensor pin 413b are arranged in front and back with an insulator 419 interposed therebetween, and the first sensor pin 413a at the tip senses temperature. A temperature sensor 418 is built in.

  In the fourth embodiment, the output of the power supply unit 404 is divided into a constant power supply and a measurement power supply. In the power saving mode, only the constant power supply is output, but when the measurement is sensed, the control of the control unit 414 (measurement on) is performed. In response, the measurement power supply is output. The constant power source is a power source that is applied to the minimum elements that need to operate in the power saving mode and that minimizes current consumption (for example, about 10 μA or less), and the measurement power source operates the entire circuit elements normally. It is a power source that enables the salinity and temperature of the measurement object to be measured with the power source.

  FIG. 16 is a flowchart showing an operation procedure of the electronic salinity meter 400 according to the fourth embodiment of the present invention.

  As shown in FIG. 16, the electronic salinity meter 400 of the fourth embodiment does not have a separate button, so that a constant power supply for the power saving mode is output except for the time for inserting the battery. The measurement monitoring unit 430 that is always operated by the power supply monitors whether or not the two sensor pins 413a and 413b are conductive (S401 and S402).

  When the sensor pins 413a and 413b are turned on, the LCD 120 displays that the measurement is being performed and measures the temperature via the temperature measurement unit 106, and the thermal equilibrium detection unit 210 stores the temperature measured by the temperature measurement unit 106. Thereafter, a temperature change amount ΔT is calculated in comparison with the previous temperature (S403 to S405).

  Then, when the calculated temperature change amount ΔT is compared with a predetermined threshold value ΔTcut and falls below the threshold value, the temperature measuring unit 106 and the salinity measuring unit 110 measure the temperature and salinity of the measurement object. (S406, S407). Next, the measured temperature and the measured salinity are converted into normal salinity values (S408).

  Further, the salinity value at normal temperature is displayed on the LCD 120 and the vibration unit 440 is vibrated to make the user recognize the end of the measurement, and a predetermined time (for example, 5 minutes) elapses after the power is turned on. Then, the power is automatically turned off to prevent the battery from being consumed (S409 to S411).

  Although the present invention has been described with reference to the embodiments shown in the drawings, various modifications and other equivalents can be made by the present invention as long as the person has ordinary knowledge in the technical field to which the present invention belongs. It should be understood that the embodiments can be performed.

10: Measuring container 11: Support base 12: Spoon 13: Sensor pin 14: Coupling part 15a, 15b: Guide groove 16: Connector 17: Jaw part 20: Main body 21: Case 22: Display part 23: Button operation part 24: Dry cell cap 25a, 25b: Guide 26: Connecting pin

Claims (12)

A pair of sensor pins for applying a voltage to the measurement object located in the measurement unit that is in contact with the measurement object;
A temperature sensor built in any one of the sensor pins for sensing the temperature of the measurement object;
A salinity measuring unit for measuring the salinity of an object to be measured by an electrical conductivity method by applying an AC power supply to the sensor pin;
A temperature measuring unit for measuring the temperature of an object to be measured by applying power to the temperature sensor;
A temperature correction unit that corrects the temperature measured by compensating the temperature measured by the temperature measurement unit according to a control signal with a predetermined temperature correction table to the actual temperature of the measurement object;
A normal temperature salinity conversion unit that converts the temperature corrected by the temperature correction unit according to a control signal and the measured value of the salinity measurement unit into a normal salinity value;
A button operation unit for receiving user operation input;
A display for displaying temperature and normal temperature salinity;
When an automatic measurement is input via the button operation unit, the sensor pin monitors whether the sensor pin is conducting, and when the sensor pin is turned on by the measurement object, the built-in timer is activated, and the built-in timer is activated. When the set time is reached, the temperature measuring unit and the salinity measuring unit are controlled to measure temperature and salinity, and the temperature correcting unit and the room temperature salinity converting unit are controlled to control the room temperature salinity. An electronic salinity meter comprising: a control unit that receives a salinity value at normal temperature from a conversion unit and controls the display unit to display temperature and normal salinity on the display unit. The electronic salinity meter is
The electronic salinity meter according to claim 1, wherein the measurement unit is formed in a spoon shape or a rod shape, and when the measurement unit is a spoon shape, the measurement unit is separable from the main body. The temperature correction table of the temperature correction unit is
The data of the measured temperature and the actual temperature when a predetermined time has elapsed after contacting the measurement object in a state where the temperature of the measurement unit is normal temperature is obtained and tabulated. Electronic salinity meter. A pair of sensor pins for applying a voltage to the measurement object located in the measurement unit that is in contact with the measurement object;
A temperature sensor built in any one of the sensor pins for sensing the temperature of the measurement object;
A salinity measuring unit for measuring the salinity of an object to be measured by an electrical conductivity method by applying an AC power supply to the sensor pin;
A temperature measuring unit for measuring the temperature of an object to be measured by applying power to the temperature sensor;
After starting the measurement according to the control signal, after storing the temperature value preliminarily measured by the temperature measuring unit at a predetermined time interval, and comparing the current temperature and the previous temperature to determine the temperature change amount, A thermal equilibrium detection unit that determines that a thermal equilibrium state has been reached when the temperature change amount is equal to or less than a predetermined threshold and instructs the salinity measurement unit and the temperature measurement unit to perform actual measurement;
A normal temperature salinity conversion unit for converting the measurement temperature of the temperature measurement unit and the salinity value of the salinity measurement unit into a normal salinity value;
A button operation unit for receiving user operation input;
A display for displaying temperature and salinity;
When an automatic measurement is input through the button operation unit, the sensor pin monitors whether or not the sensor pin is conducting. When the sensor pin is in a conducting state by the measurement object, the thermal equilibrium detection unit is activated to perform thermal equilibrium. An electronic control unit configured to receive a salinity value at room temperature from the room temperature salinity conversion unit and control to display the temperature and salinity on the display unit when the state is reached. Formula salinometer. The electronic salinity meter is
The electronic salinity meter according to claim 4, wherein the measurement unit is formed in a spoon shape or a rod shape, and when the measurement unit is a spoon shape, the measurement unit is separable from the main body. A power supply unit that normally outputs a power supply in a power saving mode according to a control signal and outputs a measurement power supply for normal operation of the circuit during measurement,
A pair of sensor pins for applying a voltage to the measurement object located in the measurement unit in contact with the measurement object;
A temperature sensor built in any one of the sensor pins for sensing the temperature of the measurement object;
A salinity measuring unit for measuring the salinity of an object to be measured by an electrical conductivity method by applying an AC power supply to the sensor pin;
A temperature measuring unit for measuring the temperature of an object to be measured by applying power to the temperature sensor;
A temperature correction unit that corrects the temperature measured by compensating the temperature measured by the temperature measurement unit according to a control signal with a predetermined temperature correction table to the actual temperature of the measurement object;
A normal temperature salinity conversion unit that converts the temperature corrected by the temperature correction unit according to a control signal and the measured value of the salinity measurement unit into a normal salinity value;
A measurement monitoring unit for sensing the start of measurement according to whether or not the sensor pin is conducting while operating with the constant power source;
A display for displaying temperature and normal temperature salinity;
When the measurement monitoring unit senses the measurement, the power supply unit outputs the measurement power supply and activates a built-in timer, and controls the temperature measurement unit and the salinity measurement unit when the built-in timer reaches a set time. The temperature and salinity are measured, the temperature correction unit and the room temperature salinity conversion unit are controlled to receive the salinity value at room temperature from the room temperature salinity conversion unit, and the display unit receives the temperature and room temperature. An electronic salinity meter comprising: a control unit that controls to display salinity. The electronic salinity meter is
The electronic salinity meter according to claim 6, wherein the measuring unit is formed in a spoon shape or a rod shape, and when the measuring portion is a spoon shape, the measuring unit is formed so as to be separable from the main body. The temperature correction table of the temperature correction unit is
The data of the measured temperature and the actual temperature when a predetermined time has elapsed after contacting the measurement object in a state where the temperature of the measurement unit is normal temperature is obtained and tabulated. The electronic salinity meter as described. The electronic salinity meter is
The electronic salinity meter according to claim 6, further comprising a vibration unit that notifies the end of the measurement by vibrating according to the control of the control unit when the measurement is completed. A power supply unit that normally outputs a power supply in a power saving mode according to a control signal and outputs a measurement power supply for normal operation of the circuit during measurement,
A pair of sensor pins for applying a voltage to the measurement object located in the measurement unit in contact with the measurement object;
A temperature sensor built in any one of the sensor pins for sensing the temperature of the measurement object;
A salinity measuring unit for measuring the salinity of an object to be measured by an electrical conductivity method by applying an AC power supply to the sensor pin;
A temperature measuring unit for measuring the temperature of an object to be measured by applying power to the temperature sensor;
After the measurement is started according to the control signal, the temperature value preliminarily measured by the temperature measurement unit at a predetermined time interval is stored, and the temperature change amount is obtained by comparing the current temperature with the previous temperature. A thermal equilibrium detection unit that determines that a thermal equilibrium state has been reached when the temperature change amount is equal to or less than a predetermined threshold and instructs the salinity measurement unit and the temperature measurement unit to perform actual measurement;
A normal temperature salinity conversion unit for converting the measurement temperature of the temperature measurement unit and the salinity value of the salinity measurement unit into a normal salinity value;
A measurement monitoring unit for sensing the start of measurement according to whether or not the sensor pin is conducting while operating with the constant power source;
A display for displaying temperature and salinity;
When measurement is sensed through the measurement monitoring unit, the thermal equilibrium state is monitored through the thermal equilibrium detection unit, and when the thermal equilibrium state is reached, the salinity value at normal temperature is received from the normal temperature salinity conversion unit and the display is performed. An electronic salinity meter comprising: a control unit that controls to display temperature and salinity on the unit. The electronic salinity meter is
The electronic salinity meter according to claim 10, wherein the measurement unit is formed in a spoon shape or a rod shape, and when the measurement unit is a spoon shape, the measurement unit is separable from the main body. The electronic salinity meter is
The electronic salinity meter according to claim 10, further comprising a vibration unit that notifies the end of the measurement by vibrating according to the control of the control unit when the measurement is completed.

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