Novel freezing point osmometer

Abstract

The novel freezing point osmometer comprises a freezing point osmometer body, a measuring circuit and a calibration circuit, the calibration circuit is matched with a comparison thermistor, and the comparison thermistor and the thermistor are installed together; the measuring circuit and the calibration circuit are installed in the element box and are electrically connected. Based on the freezing point osmometer body, in the application, under the combined action of related mechanisms, a worker can verify the thermistor performance of a temperature measurement system through a measuring circuit and can further verify the thermistor performance through a calibration circuit through simple power switch operation; whether the thermistor is in a normal working state or not can be accurately obtained, when the performance of the thermistor becomes poor, replacement can be conducted in time, and it is guaranteed that sample data detected by overall equipment is more accurate as much as possible. On the basis, the device has a good application prospect.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a novel freezing point osmometer. Background Art

[0002] The function of the freezing point osmometer is to measure the osmotic pressure of the solution. Osmotic pressure is the result of the combined influence of multiple factors such as solute concentration, temperature and solvent characteristics. It has important application value in biology, medicine, chemistry and other fields. In the field of biology, osmotic pressure is an indicator to measure the difference in concentration of solutions inside and outside cells. It is of great significance for physiological regulation, pharmacological research and other aspects. For example, in kidney function testing, kidney disease can be diagnosed by measuring the osmotic pressure of urine. In the food industry, osmotic pressure is also a key indicator for judging food quality and safety. For example, in processes such as salt water immersion and dehydration, osmotic pressure needs to be measured to control quality. The main structure of the freezing point osmometer includes refrigeration system, temperature control system, temperature measurement system, mechanical vibration system, sample addition system, data processing system, display and input system, and data output system. Before the test, the sample is placed in the test chamber through the sample adding system (the sample adding system is a semipermeable membrane bag, and the sample to be tested is mixed with pure water and then injected into the semipermeable membrane bag), and then the test temperature, test time, amplitude and other parameters, as well as the data output format are set through the refrigeration system, temperature control system, temperature measurement system, mechanical vibration system (vibration is provided during the test), display and input system; during the specific test, the equipment removes the gas and impurities in the mixture solution of the sample to be tested and pure water in the semipermeable membrane bag through the adsorbent, and then puts the test into the temperature control system (including the refrigeration system and the temperature control system) for cooling. When the temperature drops to a certain level, the solution begins to crystallize and release heat. At this time, the temperature will fluctuate. The temperature measurement system detects the characteristics of the temperature fluctuation and inputs the data into the data processing system through the display and input system. The data processing system can determine the freezing point after internal circuit processing, thereby calculating the osmotic pressure of the sample solution to be tested, and then outputs the corresponding osmotic pressure data of the sample to be tested through the data output system and displays it on the display screen of the display and input system, so that the test personnel can understand the osmotic pressure data of the sample to be tested in real time (they can also understand the data of historical test samples by operating the corresponding key options).

[0003] The thermistor in the temperature measurement system of the freezing point osmometer (its two wiring terminals and the two temperature signal terminals of the temperature measurement system are respectively connected by wires) is an important component, and its working performance is directly related to whether the osmotic pressure detection data of the sample to be tested is accurate. The thermistors of the existing freezing point osmometers do not have a calibration detection mechanism, that is, if the thermistor itself is of poor quality, or is damaged for various reasons after a long period of use, the accuracy of the sample detection data cannot be effectively guaranteed because the test personnel cannot understand the specific situation, which will more or less have an adverse effect on the application of the freezing point osmometer. In summary, it is particularly necessary to provide a freezing point osmometer with a key component thermistor self-test function. Utility Model Content

[0004] In order to overcome the drawbacks of the existing freezing point osmometers as described in the background due to structural limitations, the utility model provides a new freezing point osmometer based on the freezing point osmometer body. In application, under the joint action of relevant mechanisms, the staff can verify the thermistor performance of the temperature measurement system through a simple power switch operation. When the performance of the thermistor deteriorates, it can be replaced in time, thereby ensuring that the overall equipment detects sample data with more accuracy as much as possible.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A novel freezing point osmometer comprises a freezing point osmometer body, characterized in that it also comprises a measuring circuit and a calibration circuit; the calibration circuit is equipped with a comparison thermistor, and the comparison thermistor and the thermistor of the temperature measurement system of the freezing point osmometer body are installed in parallel; the measuring circuit and the calibration circuit are installed in a component box; the two ends of the thermistor are electrically connected to the two signal input ends of the measuring circuit respectively, the signal output end of the calibration circuit is electrically connected to the control end of the measuring circuit, the two ends of the comparison thermistor are electrically connected to the two ends of the signal input of the calibration circuit respectively; the signal output end of the measuring circuit is electrically connected to the two ends of the temperature signal input of the temperature measurement system respectively.

[0007] Furthermore, the comparison thermistor and the thermistor of the temperature measurement system have the same specifications, and both are negative temperature coefficient thermistors.

[0008] Furthermore, the measuring circuit includes an electrically connected relay, a power switch, a voltage display meter, and a resistor, one end of the first power switch is connected to one of the control power input ends of the first relay, the other end of the first power switch is connected to the positive power input ends of the two relays, the two normally open contact ends of the second relay are respectively connected to the two normally open contact ends of the first relay, the other control power input end of the first relay is connected to one end of the first resistor, one end of the second resistor, one end of the third resistor, and one end of the fourth resistor, the other end of the second resistor is connected in series to the positive power input end of the first voltmeter via the second power switch, the other end of the third resistor is connected in series to the positive power input end of the second voltmeter via the third power switch, and the negative power input ends of the two relays are connected to the other ends of the first resistor and the other ends of the fourth resistor.

[0009] Furthermore, the calibration circuit includes electrically connected resistors and power switches, one end of the four resistors is connected, the other ends of the first resistor and the third resistor are connected, and the other ends of the second resistor and the fourth resistor are respectively connected to one end of the two power switches.

[0010] Compared with the prior art, the utility model has the following beneficial effects: the utility model is based on the freezing point osmometer body. In application, under the joint action of relevant mechanisms, the staff can verify the thermistor performance of the temperature measurement system through the measurement circuit through a simple power switch operation, and can further verify the thermistor performance through the calibration circuit, and can accurately determine whether the thermistor is in a normal working state. When the thermistor performance deteriorates, it can be replaced in time, ensuring that the overall equipment detects more accurate sample data as much as possible. Based on the above, the utility model has a good application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 It is a schematic diagram of the overall structure and the partially enlarged structure of the utility model.

[0013] Figure 2 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0014] Figure 1 , 2 As shown in the figure, the new freezing point osmometer includes a freezing point osmometer body 1, a power module W1, and also has a measuring circuit 2 and a calibration circuit 3; the calibration circuit 3 is equipped with a comparison thermistor RT1, and the comparison thermistor RT1 and the thermistor RT of the temperature measurement system W2 of the freezing point osmometer body are installed in parallel; the power module W1, the measuring circuit 2 and the calibration circuit 3 are installed in the component box of the freezing point osmometer body 1.

[0015] Figure 1 , 2 As shown in the figure, the thermistor RT1 and the thermistor RT of the temperature measurement system are consistent in model and specification, both of which are negative temperature coefficient thermistors. The measuring circuit includes relays K1 and K2 connected by circuit board wiring, power switches S1, S2, S3, small liquid crystal voltage display meters V and V1, resistors R2, R3, R4, R5, one end of the first power switch S1 is connected to one of the control power input ends of the first relay K2, the other end of the power switch S1 is connected to the two relays K2 and the positive power input ends of K1, the two normally open contact ends of the second relay K1 are respectively connected to the two normally open contact ends of the first relay K2, the other control power input end of the first relay K2 is connected to one end of the first resistor R2, one end of the second resistor R3, one end of the third resistor R4, and one end of the fourth resistor R5, the other end of the second resistor R3 is connected in series with the positive power input end of the first voltmeter V through the second S2, the other end of the fourth resistor R5 is connected in series with the positive power input end of the second voltmeter V1 through the third power switch S3, and the negative power input ends of the two relays K2 and K1 are connected to the other ends of the first resistor R2 and the third resistor R4. The calibration circuit includes resistors R6, R7, R8, R9 and power switches S4 and S5 connected via circuit board wiring. One ends of the four resistors R6, R7, R8 and R9 are connected, the other ends of the first resistor R6 and the third resistor R8 are connected, and the other ends of the second resistor R7 and the fourth resistor R9 are connected to one end of the two power switches S4 and S5 respectively. The power input terminals 1 and 2 of the power module W1 and the power input terminal of the freezing point osmometer body are connected to the two poles of the AC 220V power supply through wires, respectively; the power output terminals 3 and 4 of the power module W1 and one of the control power input terminals of the power input terminal relay K2 of the measuring circuit and the negative power input terminal of the relay K2, the power input terminal of the calibration circuit, the other end of the thermistor RT1 and the other end of the resistor R6 are connected through wires; the two temperature signal terminals of the temperature measurement system W2 and the two normally closed contact terminals of the relay K1 of the two signal input terminals of the measuring circuit are connected through wires, respectively; the two ends of the thermistor RT of the temperature measurement system W2 and the two control power input terminals of the relay K1 are connected through wires, respectively; the other end of the power switch S4 and S5 of the calibration circuit, the positive power input terminals of the voltmeters V and V1 of the control terminal of the measuring circuit are connected through wires, respectively; the two ends of the comparison thermistor RT1 and the signal input terminal of the calibration circuit, the positive power output terminal of the power module W1 and the other end of the resistor R6 are connected through wires. The toggle handles of all power switches and the display interface of the voltmeter are respectively located outside the multiple openings at the front end of the component box.

[0016] Figure 1 , 2As shown in , the AC 220V power supply enters the power input terminal of the power module W1 and the freezing point osmometer body 1, and the power module W1 and the freezing point osmometer body 1 are powered on. The stable DC 12V power output from the 3rd and 4th pins of the power module W1 will enter the power input terminal of the measurement circuit and the calibration circuit. After the freezing point osmometer body 1 is powered on and working, before the test, the sample is placed in the test chamber through the sample addition system (the sample addition system is a semipermeable membrane bag, and the sample to be tested is mixed with pure water and injected into the semipermeable membrane bag), and then through the refrigeration system, temperature control system, temperature measurement system, mechanical vibration system (vibration is provided during the test), display and input system, set the test temperature, test time, amplitude and other parameters, as well as the data output format; during the specific test, the equipment removes the gas and impurities in the mixture solution of the sample to be tested and pure water in the semipermeable membrane bag through the adsorbent, and then puts the test into the temperature control system (including the refrigeration system and the temperature control system) Cooling, when the temperature drops to a certain degree, the solution begins to crystallize and release heat, and the temperature will fluctuate at this time. The temperature measurement system detects the characteristics of temperature fluctuations, and inputs the data into the data processing system through the display and input system. The data processing system can determine the freezing point after internal circuit processing, thereby calculating the osmotic pressure of the sample solution being tested, and then the osmotic pressure data of the corresponding sample being tested is output through the data output system and displayed on the display screen of the display and input system, and the detection personnel can know the osmotic pressure data of the sample being tested in real time (the data of the historical detection samples can also be understood by operating the corresponding key options). The above is an existing mature technology, and this application will not be repeated, and this application does not protect the structure and function of the freezing point osmometer body 1 itself.

[0017] Figure 1 , 2As shown, normally one of the temperature signal terminals of the temperature measurement system W2 passes through one of the control power input terminals of the relay K1 (one end of the thermistor RT), one of the normally closed contact terminals, the other normally closed contact terminal, the other control power input terminal of the relay K1 ((the other end of the thermistor RT)), and enters the other temperature signal terminal of the temperature measurement system W2. In this way, the freezing point osmometer body 1 can enter the detection work normally. When the equipment is not in use and the performance of thermistor RT needs to be tested, the staff turns on the power switches S1, S2, and S3, and relay K1 is energized to close its control power input terminal and normally open contact terminal, and the control power input terminal and normally closed contact terminal are open. Relay K2 is energized to close its control power input terminal and normally open contact terminal. In this way, one temperature signal terminal and another temperature signal terminal of the temperature measurement system W2 and both ends of the thermistor RT are open, and the 12V power supply enters one end of the thermistor RT through one control power input terminal and one normally open contact terminal of relay K2, and then enters another control power input terminal of relay K2 and another normally open contact terminal through the other end of the thermistor RT to enter one end of resistors R2, R3, R4, and R5; the 12V power supply enters the power input terminal of the voltmeter V through the thermistor RT, the voltage division of resistor R2, and the voltage reduction and current limiting of resistor R3, and the voltmeter V displays At the same time, the 12V power supply enters the power input terminal of the voltmeter V1 through the thermistor RT, the resistor R4 for voltage division, and the resistor R5 for voltage reduction and current limiting, and the voltmeter V1 displays the specific voltage number; by observing the voltage numbers displayed by the two voltmeters V and V1, the staff can understand the basic performance data of the thermistor RT and the current temperature of the freezing point osmometer body 1 (for example, the voltage numbers displayed by the two voltmeters are both 5V; the present application uses two voltmeters V and V1 to display voltage data to prevent the use of only one voltmeter. In extreme cases, the damage of the voltmeter will have an adverse effect on the subsequent detection effect, that is to say, in the detection, only when the voltage numbers displayed by the two voltmeters V and V1 are consistent, the detected data is valid); the detection personnel record the data displayed by the two voltmeters and then turn off the power switches S1, S2, and S3, and turn on the power switches S4 and S5. After the calibration circuit is powered on, the 12V power supply enters the power input terminal of the voltmeter V through the calibrated thermistor RT1 and the resistor R6, and the resistor R7 steps down the voltage and limits the current, and the voltmeter V displays the specific voltage number; at the same time, the 12V power supply enters the power input terminal of the voltmeter V1 through the calibrated thermistor RT1 and the resistor R8, and the resistor R9 steps down the voltage and limits the current, and the voltmeter V1 displays the specific voltage number; by observing the voltage numbers of the two voltmeters V and V1, the staff can obtain the basic performance data of the calibrated thermistor RT1 at the current temperature (for example, the voltage number displayed by the two voltmeters is 5V), and turn off the power switches S4 and S5 after the detection is completed.Finally, the staff will compare the voltage data displayed by the voltmeter V and the voltmeter V1 obtained based on the detection of the thermistor and the calibrated thermistor. If the displayed data are consistent, it means that the performance of the thermistor RT is normal; when the voltage data displayed by the voltmeter V and the voltmeter V1 are compared based on the detection of the thermistor and the calibrated thermistor, if the displayed data are inconsistent, it means that there is a problem with the performance of the thermistor RT or the calibrated thermistor RT1. The staff can specifically remove the thermistor RT or thermistor RT1 for detection with a multimeter, etc. After eliminating the specific fault, the freezing point osmometer body 1 can work normally again (in actual circumstances, based on the data detected by the thermistor and the calibrated thermistor, if the data displayed by the voltmeters V and V1 are deviated when only the thermistor or the calibrated thermistor is detected, but the data of the deviation of the voltmeters V and V1 are consistent in the two detections, it means that one of the voltmeters has a quality problem, but the thermistor RT and the calibrated thermistor RT1 are in good performance).

[0018] Figure 1 , 2 As shown. Through the above, the new type is based on the freezing point osmometer body. In the application, under the joint action of relevant mechanisms, the staff can verify the thermistor performance of the temperature measurement system through the measurement circuit through a simple power switch operation, and can further verify the thermistor performance through the calibration circuit, and can accurately determine whether the thermistor is in a normal working state. When the thermistor performance deteriorates, it can be replaced in time, ensuring that the overall equipment detects sample data more accurately as much as possible. Figure 2 Among them, the model of relays K1 and K2 is DC12V; the resistance values ​​of resistors R1, R2, R3, R4, R5, R6, R7, R8, and R9 are 4K, 1K, 4K, 1K, 4K, 1K, 4K, and 1K respectively; the power module W1 is a finished product of AC 220V to DC 12V power module; the thermistor RT and the calibration thermistor RT1 are negative temperature coefficient thermistors of model NTC103D; the voltmeter V and voltmeter V1 are LCD voltage display meters with a range of 112V.

[0019] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0020] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A novel freezing point osmometer, comprising a freezing point osmometer body, characterized in that: It also has a measuring circuit and a calibration circuit; the calibration circuit is equipped with a comparison thermistor, and the comparison thermistor and the thermistor of the temperature measurement system of the freezing point osmometer body are installed in parallel; the measuring circuit and the calibration circuit are installed in a component box; the two ends of the thermistor are electrically connected to the two signal input ends of the measuring circuit, the signal output end of the calibration circuit is electrically connected to the control end of the measuring circuit, and the two ends of the comparison thermistor are electrically connected to the signal input ends of the calibration circuit; the signal output end of the measuring circuit is electrically connected to the temperature signal input ends of the temperature measurement system.

2. The novel freezing point osmometer according to claim 1, characterized in that: The specifications of the thermistor and the thermistor of the temperature measurement system are consistent, both are negative temperature coefficient thermistors.

3. The novel freezing point osmometer according to claim 1, characterized in that: The measuring circuit includes an electrically connected relay, a power switch, a voltage display meter, and a resistor. One end of the first power switch is connected to one of the control power input ends of the first relay, the other end of the first power switch is connected to the positive power input ends of the two relays, the two normally open contact ends of the second relay are respectively connected to the two normally open contact ends of the first relay, the other control power input end of the first relay is connected to one end of the first resistor, one end of the second resistor, one end of the third resistor, and one end of the fourth resistor, the other end of the second resistor is connected in series with the positive power input end of the first voltmeter via the second power switch, the other end of the third resistor is connected in series with the positive power input end of the second voltmeter via the third power switch, and the negative power input ends of the two relays are connected to the other ends of the first resistor and the other ends of the fourth resistor.

4. The novel freezing point osmometer according to claim 1, characterized in that: The calibration circuit includes electrically connected resistors and power switches. One ends of the four resistors are connected, the other ends of the first resistor and the third resistor are connected, and the other ends of the second resistor and the fourth resistor are respectively connected to one end of the two power switches.

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