CN114778631A - Body index detection device and method - Google Patents
Body index detection device and method Download PDFInfo
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- CN114778631A CN114778631A CN202210683115.XA CN202210683115A CN114778631A CN 114778631 A CN114778631 A CN 114778631A CN 202210683115 A CN202210683115 A CN 202210683115A CN 114778631 A CN114778631 A CN 114778631A
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Abstract
The application relates to the field of body index measurement technology, in particular to a body index detection device and a method, and the device comprises a test strip identification module, a current acquisition module, a controller U1 and a prompt piece LCD 1; the test strip identification module is used for identifying the type of an external test strip to obtain an identification result; the current acquisition module is used for detecting the current value of a test electrode of an external test strip to obtain a current acquisition result; the controller U1 is used for calculating a corresponding body index value according to a preset algorithm based on the identification result and the current acquisition result; the reminder LCD1 is used for outputting the body index value. The body index detection device has the advantages that a user can detect multiple body indexes by using one body index detection device, and the use cost of the user is effectively reduced under the condition that the user needs to measure the multiple body indexes; meanwhile, the detection disorder caused by poor contact of the test strip can be reduced, so that the accuracy of the detection result is improved.
Description
Technical Field
The present application relates to the field of body index measurement technologies, and in particular, to a body index detection device and method.
Background
The social life rhythm of modern people is faster and faster, so that more and more people with body indexes which do not accord with the health level are caused. In order to ensure physical health, many people need to pay attention to their physical indexes such as blood sugar, blood ketone, lactose, etc., and small-sized physical index detection devices suitable for personal use have been developed. There are devices currently on the market for testing one physical metric, as well as devices capable of testing multiple physical metrics. For the device that can only test a health index, when the user needs to measure multiple health indexes, need purchase many devices, use cost is higher, and different devices probably operation mode is different moreover, and the easy maloperation when the user mixes and uses. For a device capable of measuring multiple body indexes, the current technology is to set multiple test electrodes corresponding to multiple body indexes on a single test strip, but the increase of the test electrodes also increases the risk of poor contact between the test strip and a test strip interface on the device, which easily causes detection disorder and leads to inaccurate detection results.
Disclosure of Invention
In order to reduce the use cost of a user when a plurality of body indexes need to be measured and improve the accuracy of a detection result, the application provides a body index detection device and a method.
In a first aspect, the present application provides a body index detection device, which adopts the following technical scheme:
a body index detection device comprises a test strip identification module, a current acquisition module, a controller U1 and a prompting piece LCD 1; the test strip identification module is used for identifying the type of an external test strip to obtain an identification result; the current acquisition module is used for detecting the current value of a test electrode of an external test strip to obtain a current acquisition result; the controller U1 is used for calculating a corresponding body index value according to a preset algorithm based on the identification result and the current acquisition result; the reminder LCD1 is used for outputting the body index value.
By adopting the technical scheme, a user can detect multiple body indexes by using one body index detection device, so that the use cost of the user is reduced effectively under the condition that the user needs to measure the multiple body indexes; meanwhile, the body index detection device can automatically identify detection items corresponding to the test strips, and call corresponding algorithms to calculate corresponding body index values, and when a user detects different body indexes, different test strips are used for detecting different body indexes, so that excessive test electrodes do not need to be arranged on each test strip, detection disorder caused by poor contact is effectively reduced, and the accuracy of detection results is improved.
Optionally, the test strip identification module is a resistance detection circuit for testing an identification resistor of an external test strip.
Through adopting above-mentioned technical scheme, can discern corresponding test paper strip through discerning the resistance, the extension of the project quantity is discerned to the physical index detection device of being convenient for physical index detection device's detection function is abundanter.
Optionally, the resistance detection circuit includes a reference voltage source and a resistor R25, one end of the resistor R25 is connected to the output end of the reference voltage source, the other end of the resistor R25 is connected to the identification resistor of the external test strip, the connection between the identification resistor of the external test strip and the resistor R25 is a first connection point, and the first connection point is connected to the first input end of the controller U1.
By adopting the technical scheme, the body index detection device can realize the detection of the resistance value of the identification resistor of the test strip through the simple voltage division circuit, namely, the identification of the test strip is realized through a low hardware cost mode, and the manufacturing cost of the body index detection device is effectively reduced.
Optionally, the current collecting module includes a first current sampling circuit and a second current sampling circuit.
By adopting the technical scheme, the current collection module can carry out current sampling on the test electrodes at different positions of the reaction zone on the test strip so as to identify whether the test strip absorbs enough blood, the occurrence of the condition that the detection result is wrong due to insufficient blood volume is reduced, and the accuracy of the body index detection result is improved.
Optionally, the current acquisition module includes the constant voltage source, first current sampling circuit includes resistance R3, operational amplifier U5D and voltage follower U5A, resistance R3's one end and operational amplifier U5D's negative input end all with the test electrode of outside test paper strip is connected, the output of constant voltage source with operational amplifier U5D's positive input end is connected, resistance R3's the other end and operational amplifier U5D's output all with voltage follower U5A's input is connected, voltage follower U5A's output with the second input of controller U1 is connected.
By adopting the technical scheme, the resistor R3 is used for sampling the current, the operational amplifier U5D is used for converting the sampled current into the voltage which can be identified by the controller U1, and therefore the first current sampling result is obtained through a simple hardware circuit.
In a second aspect, the present application provides a body index detection method, which adopts the following technical scheme:
a method of physical metric detection, the method comprising the steps of:
identifying the type of the test strip in response to the connection operation of the user to obtain an identification result;
detecting the current value of the test electrode of the test strip to obtain a current acquisition result;
calculating a corresponding body index value according to a preset algorithm based on the identification result and the current acquisition result;
outputting the body index value.
By adopting the technical scheme, one body index detection device can detect multiple body indexes, and the use cost of a user under the condition that the multiple body indexes need to be detected is effectively reduced; meanwhile, different types of test strips are identified instead of integrating detection of multiple indexes on one test strip, so that the number of test electrodes required to be arranged on the test strip is small, the condition that the detection result is disordered due to poor contact caused by excessive test electrodes is reduced, and the accuracy of the detection result is improved.
Optionally, when the type of the test strip is identified in response to the user's connection operation to obtain an identification result, the method includes the following steps:
acquiring the resistance value of the identification resistor of the test strip;
and obtaining a recognition result according to a preset corresponding relation between the type of the test strip and the resistance value based on the resistance value.
By adopting the technical scheme, the type of the test strip can be identified by utilizing the resistance value of the test strip identification resistor, so that the identification of the test strip is realized by utilizing a lower-cost mode; meanwhile, the value range of the resistance value is not limited, so that the expansion of the number of detection items is easy to realize, and a user can test more different types of body indexes by using one body index detection device.
Optionally, after the step of detecting the current value of the test electrode of the test strip to obtain the current collecting result, the body index detecting method further includes the following steps: judging whether the current acquisition result reaches a preset current threshold value or not to obtain a threshold value judgment result;
and if the threshold judgment result is yes, executing the step of calculating the corresponding body index value according to a preset algorithm.
By adopting the technical scheme, whether the reaction area of the test strip has fully reacted or not is judged by utilizing the sampled current, and the calculation of body index values is carried out after the reaction area has fully reacted as far as possible, so that the accuracy of the detection result is improved.
Optionally, the current collecting result includes a first current sampling result and a second current sampling result;
when judging whether the current acquisition result reaches a preset current threshold value to obtain a threshold value judgment result, the method comprises the following steps:
judging whether the first current sampling result reaches a preset first threshold value or not to obtain a first judgment result;
if the first judgment result is yes, judging whether the second current sampling result reaches a preset second threshold value within preset sampling time to obtain a second judgment result;
if the second judgment result is yes, judging that the current acquisition result reaches a preset current threshold;
if the second judgment result is negative, the current acquisition result is judged that the current acquisition result does not reach the preset current threshold.
By adopting the technical scheme, the current sampling can be carried out at different positions of the reaction area on the test strip so as to identify whether the test strip absorbs enough blood, the occurrence of the condition that the detection result is wrong due to insufficient blood volume is reduced, and the accuracy of the body index detection result is improved.
Optionally, if the threshold determination result is yes, the step of calculating the corresponding body index value according to the preset algorithm is performed after the preset calculation time is reached.
By adopting the technical scheme, the body index value is calculated after the reaction in the test strip is stable, so that the accuracy of the body index detection result is improved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the user can utilize one body index detection device to detect multiple body indexes, so that the use cost of the user is reduced under the condition that the user needs to measure the multiple body indexes;
2. the detection items corresponding to the test strips can be automatically identified, the corresponding algorithm is called to calculate the corresponding body index value, and a user detects different body indexes by using different test strips during detection, so that excessive test electrodes do not need to be arranged on each test strip, detection disorder caused by poor contact is effectively reduced, and the accuracy of a detection result is improved;
corresponding test paper strips can be identified through identifying the resistance value, the body index detection device can conveniently identify the expansion of the quantity of items, and the detection function of the body index detection device is richer.
Drawings
Fig. 1 is a schematic structural diagram of a test strip according to a first embodiment of the present application.
Fig. 2 is a circuit diagram of a test strip identification module according to a first embodiment of the present application.
Fig. 3 is a circuit diagram of a current collection module according to a first embodiment of the present application.
Fig. 4 is a circuit diagram of the controller U1 according to the first embodiment of the present application.
Fig. 5 is a circuit diagram of the reminder LCD1 according to the first embodiment of the present application.
Fig. 6 is a circuit diagram of a reference voltage source according to a first embodiment of the present application.
Fig. 7 is a circuit diagram of a power management module according to a first embodiment of the present application.
Fig. 8 is a schematic structural diagram of a test strip according to the second embodiment of the present application.
Fig. 9 is a schematic structural diagram of a slip identification module according to a second embodiment of the present application.
Fig. 10 is a block diagram illustrating the flow from step S1 to step S4 in the third embodiment of the present application.
Fig. 11 is a block diagram illustrating a flow of steps S4 to S7 according to the third embodiment of the present application.
Fig. 12 is a block diagram of the flow from step S21 to step S22 in the third embodiment of the present application.
Fig. 13 is a block diagram of the flow from step S41 to step S43 in the third embodiment of the present application.
Fig. 14 is a block diagram illustrating a flow of steps S21 to S22 according to the fourth embodiment of the present application.
Description of reference numerals: 1. a test strip; 11. a reaction zone; 12. a first terminal; 13. a second terminal; 14. a third terminal; 15. a fourth terminal; 16. identifying a resistor; 17. identifying the mark; 2. a test strip identification module; 21. a reference voltage source; 22. a CCD camera; 23. an image analysis unit; 3. a current collection module; 31. a first current sampling circuit; 32. a second current sampling circuit; 33. a constant voltage source; 4. and a power management module.
Detailed Description
The present application is described in further detail below with reference to the accompanying drawings.
The test strip 1 used in the present application has a specific structure as shown in fig. 1. The test strip 1 is provided with a reaction area 11, a first terminal 12, a third terminal 14 and a fourth terminal 15, wherein the third terminal 14 and the fourth terminal 15 constitute a test electrode of the test strip 1. The reaction region 11 has an inlet end and a bottom end, and when a user inputs blood into the reaction region 11, the blood diffuses from the inlet end to the bottom end through a siphon reaction. Specifically, the fourth terminal 15 is connected to the reaction region 11 near the inlet end to identify the blood condition of the reaction region 11 near the inlet end, and the third terminal 14 is connected to the reaction region 11 near the bottom end to identify the blood condition of the reaction region 11 at the bottom end.
The flow of the body index detection device used by the user is as follows:
1. the user selects the corresponding test strip 1 according to the body index to be detected. The physical index specifically refers to physiological indexes such as blood sugar, lactose, blood ketone, etc.
2. After selection, the test strip 1 is inserted into a test strip slot of a body index detection device. Each terminal on the test paper strip 1 collides with the interface of the corresponding circuit in the body index detection device, so that the test paper strip 1 is connected to each circuit. The first terminal 12 of the test strip 1 is connected to the ground of the circuit in the body index detection device, the second terminal 13 is connected to the resistance value detection circuit in the body index detection device, the third terminal 14 is connected to the second sampling circuit in the body index detection device, and the fourth terminal 15 is connected to the first sampling circuit in the body index detection device.
3. A small hole is punctured in the user's finger to allow blood to flow out. The reaction zone 11 inlet of the strip 1 is aligned with the blood of the user. Reaction zone 11 draws in the user's blood using the siphon principle and allows the user's blood to fill reaction zone 11. The reaction zone 11 is provided with a reaction reagent corresponding to the type of the body index detected by the test strip 1, after the blood of the user reacts with the reaction reagent in the reaction zone 11, the reaction zone 11 is provided with current, the current value of the current output by the reaction zone 11 is detected, and the corresponding body index value can be calculated according to the electrochemical reaction principle.
4. The body index detection device calculates and displays the corresponding body index.
Example one
The present embodiment provides a body index detection apparatus. Referring to fig. 2 to 7, the body index detection device includes a test strip identification module 2, a current collection module 3, a controller U1, a prompt LCD1, and a power management module 4. Wherein the controller U1 is specifically a single chip microcomputer. The prompt LCD1 is embodied as a nixie tube.
The test strip identification module 2 is used for identifying the type of the test strip 1 to obtain an identification result.
The test strip 1 used in this embodiment is provided with a recognition resistor 16. The test strip identification module 2 is a resistance value detection circuit for testing the identification resistor 16 of the test strip 1. Assuming that the identification resistance 16 on the blood glucose test strip 1 is 1K Ω, the identification resistance 16 on the blood ketone test strip 1 is 3K Ω, and the identification resistance 16 on the lactose test strip 1 is 5K Ω, when the resistance detection circuit detects that the resistance of the identification resistance 16 on the blood glucose test strip 1 is 1K Ω, the controller U1 identifies that the blood glucose test strip 1 is the blood glucose test strip 1. In consideration of the problem of detection accuracy, the identification condition of the controller U1 may be set to a range of values, such as when the resistance detection circuit detects that the resistance of the identification resistor 16 is 700 Ω to 1300 Ω, the test strip 1 is regarded as the blood glucose test strip 1. Meanwhile, in consideration of the manufacturing process, the specified value of the production process of the test strip 1 can be set as a range value, for example, the resistance value of the identification resistor 16 of the blood glucose test strip 1 is 0-1000 Ω (precision ± 30%), the resistance value of the identification resistor 16 of the blood ketone test strip 1 is 2000-3000 Ω (precision ± 30%), and the resistance value of the identification resistor 16 of the lactic acid test strip 1 is 4000-5000 Ω (precision ± 30%). And the identification condition of the controller U1 is set to the range value accordingly. When the identification resistor 16 is used for identifying the type of the test strip 1, the occupied position of the identification resistor 16 is small, so that a manufacturer can conveniently make the test strip 1 small. Meanwhile, the resistance value is not limited, so that the type of the test strip 1 can be easily expanded, namely the number of the physical index items which can be measured by the physical index detection device is expanded, and the practicability of the physical index detection device is greatly improved.
Specifically, as shown in fig. 1, the test strip 1 is further provided with a second terminal 13, and both ends of the identification resistor 16 are connected to the first terminal 12 and the second terminal 13, respectively. As shown in fig. 2, the resistance value detection circuit includes a reference voltage source 21 and a resistor R25, one end of the resistor R25 is connected to the output end of the reference voltage source 21, the other end of the resistor R25 is connected to the second terminal 13 of the test strip 1, a connection point between the second terminal 13 and the resistor R25 is a first connection point, and the first connection point is connected to the first input end of the controller U1. At this moment, the resistance value detection circuit can detect the resistance value of the identification resistor 16 of the test strip 1 through a simple voltage division circuit, namely, the identification of the test strip 1 is realized through a low hardware cost mode, and the manufacturing cost of the body index detection device is effectively reduced. A first input of the controller U1 is an input of an analog-to-digital converter in the controller U1, which is capable of converting between analog signals and digital signals. As shown in fig. 6, the reference voltage source 21 includes a voltage follower U6B and a voltage reference chip U7, and an output terminal of the voltage reference chip U7 is connected to an output terminal of the reference voltage source 21 through the voltage follower U6B. The voltage reference chip U7 has a model number ISL 21010. Further, the resistance value detection circuit further comprises a voltage follower U6A, and the first connection point is connected with the first input end of the controller U1 through the voltage follower U6A, so that the isolation between the voltage division circuit and the controller U1 is realized through the voltage follower U6A. In order to further realize filtering, the resistance value detection circuit further comprises a resistor R24 and a capacitor C32, the first connection point is connected with the voltage follower U6A through the resistor R24, a connection point between the resistor R24 and the voltage follower U6A is a second connection point, and the second connection point is grounded through the capacitor C32.
The current collection module 3 is used for detecting the current value of the test electrode of the test strip 1 to obtain a current collection result.
The current acquisition result comprises a first current sampling result and a second current sampling result. In order to prevent the detection result from being incorrect due to insufficient blood sucked into the reaction region 11 or insufficient blood sucked into the reaction region 11, as shown in fig. 3, the current collecting module 3 includes a constant voltage source 33, a first current sampling circuit 31 and a second current sampling circuit 32, the first current sampling circuit 31 is connected to the fourth terminal 15 to identify the blood condition of the reaction region 11 near the inlet end, the second current sampling circuit 32 is connected to the third terminal 14 to identify the blood condition of the bottom end of the reaction region 11, wherein the sampling result of the first current sampling circuit 31 is the first sampling result, and the sampling result of the second current sampling circuit 32 is the second sampling result. The specific process of the first current sampling circuit 31 and the second current sampling circuit 32 in cooperation with the controller U1 is as follows: the controller U1 receives the first sampling result of the first current sampling circuit 31, determines that blood flows into the reaction region 11 when the controller U1 detects that the first sampling result reaches a preset first threshold, and then the controller U1 receives and times the second sampling result of the second current sampling circuit 32, and determines that the reaction region 11 is full when the second sampling result reaches a preset second threshold within a preset sampling time, thereby meeting the condition of calculating the body index value. Specifically, the first current sampling circuit 31 includes a resistor R3, an operational amplifier U5D and a voltage follower U5A, one end of the resistor R3 and a negative input end of the operational amplifier U5D are all connected to the fourth terminal 15 of the test strip 1, an output end of the constant voltage source 33 is connected to a positive input end of the operational amplifier U5D, the other end of the resistor R3 and an output end of the operational amplifier U5D are all connected to an input end of the voltage follower U5A, and an output end of the voltage follower U5A is connected to a second input end of the controller U1. The resistor R3 is a sampling resistor for sampling current at a position, close to the inlet end, of the reaction zone 11, after the resistor R3 is sampled, the operational amplifier U5D converts the current sampled by the resistor R3 into voltage and inputs the voltage into the controller U1 through the voltage follower U5A, and the controller U1 is internally provided with an analog-to-digital converter which can perform analog-to-digital conversion on the voltage value output by the voltage follower U5A so as to be used for subsequent calculation. Further, the first current sampling circuit 31 further includes a resistor R4 connected in parallel with the resistor R3, and the resistance of the resistor R4 is equal to that of the resistor R3. After the equivalent resistors are connected in parallel, the total resistance value in the parallel circuit is equal to the resistance value of a single resistor divided by the number of resistors in the parallel circuit. By utilizing the principle, the resistance value of the sampling resistor can be reduced to the greatest extent and tends to the target resistance value due to errors caused by the process, so that the sampling precision is improved. The second current sampling circuit 32 is similar to the first current sampling circuit 31 in terms of hardware and sampling principle, and specifically, the second current sampling circuit 32 includes a resistor R1, an operational amplifier U5C, a voltage follower U5B, and a resistor R2 connected in parallel with the resistor R1, one end of the resistor R1 and the negative input end of the operational amplifier U5C are both connected with the third terminal 14 of the test strip 1, the output end of the constant voltage source 33 is connected with the positive input end of the operational amplifier U5C, the other end of the resistor R1 and the output end of the operational amplifier U5C are both connected with the input end of the voltage follower U5B, and the output end of the voltage follower U5B is connected with the third input end of the controller U1. The second input and the third input of the controller U1 are inputs of an analog-to-digital converter in the controller U1, and can convert between an analog signal and a digital signal.
The controller U1 is used for calculating a corresponding body index value according to a preset algorithm based on the identification result and the current collection result.
As shown in fig. 4 and 5, the controller U1 has stored therein respective algorithms for calculating different physical indicators. The controller U1 identifies the type of the test strip 1 through the test strip identification module 2, and after identifying the condition that meets the calculation of the body index value through the current collection module 3, calls a corresponding algorithm, substitutes the data detected by the current collection module 3 into the corresponding algorithm to calculate the body index, and after the calculation is completed, the prompt piece LCD1 displays the calculation result, that is, the corresponding body index value.
Preferably, the external power source supplies power to the body index detection device through the power management module 4. The external power source may specifically be a battery. As shown in fig. 7, the power management module 4 includes a switch tube Q1 and a resistor R20, an output terminal of the controller U1 is connected to a control terminal of the switch tube Q1 through a resistor R20, an input terminal of the switch tube Q1 is connected to an external power supply, and a power terminal of the strip recognition module 2 and a power terminal of the current collection module 3 are respectively connected to an output terminal of the switch tube Q1, so that the controller U1 can control the activation of the strip recognition module 2 and the current collection module 3 by controlling the power-on condition. Specifically, a switch may also be connected to an input of the controller U1. In the power-off state, the switching tube Q1 is turned off, and when the user presses the switch, the controller U1 controls the switching tube Q1 to be turned on, so that the test paper identification module and the current collection module 3 are powered on.
Example two
Referring to fig. 8 to 9, the present embodiment is different from the first embodiment in that the manner of identifying the type of the test strip 1 by the test strip identification module 2 is different from that of the first embodiment.
The test strip 1 in this embodiment is provided with an identification mark 17. The test strip recognition module 2 comprises a CCD camera 22 and an image analysis unit 23, and the recognition mark 17 on the test strip 1 is used for shooting by the CCD camera 22. After shooting, the image analysis unit 23 analyzes the color or pattern of the identification mark 17 according to the preset corresponding relationship, and the controller U1 analyzes what type of the test strip 1 is according to the analysis result of the image analysis unit 23 and the preset corresponding relationship, so as to identify the test strip 1.
EXAMPLE III
The present embodiment provides a body index detection method corresponding to the body index detection device. Referring to fig. 10 to 11, the method includes the steps of:
s1: and responding to the starting operation of the user to carry out system initialization.
The user's power-on operation may specifically refer to pressing a power key. System initialization refers primarily to initializing the RCC clock configuration, GPIO input-output configuration, ADC configuration, and timer configuration in the controller U1 of the body indicator detection device.
S2: the type of the test strip 1 is identified in response to a user's attachment operation to obtain an identification result.
After the user inserts test paper strip 1 into the test paper slot of the body index detection device, the body index detection device identifies test paper strip 1 to know which body index test paper strip 1 is used for detecting.
In this embodiment, as shown in fig. 12, the specific steps of identifying the test strip 1 are as follows:
s21: acquiring the resistance value of the identification resistor 16 of the test strip 1;
s22: and obtaining a recognition result according to a preset corresponding relation between the type of the test strip 1 and the resistance value based on the resistance value.
In this embodiment, the test strip 1 is correspondingly printed with the identification resistors 16, and the resistance values of the identification resistors 16 are different on different types of test strips 1. The body index detection device identifies the resistance value of the identification resistor 16 of the test strip 1 through the resistance value detection circuit so as to acquire the type of the test strip 1.
S3: and detecting the current value of the test electrode of the test strip 1 to obtain a current acquisition result. The body index detection device is connected with the test electrode connected with the reaction area 11 according to the current sampling principle so as to acquire the current condition of the reaction area 11 of the test strip 1.
S4: and judging whether the current acquisition result reaches a preset current threshold value or not to obtain a threshold value judgment result.
In the case where reaction region 11 is not sufficiently filled with blood or the operation is not proper when blood is supplied to reaction region 11, an inaccurate detection result may occur. Therefore, whether the current acquisition result meets the condition for subsequent calculation can be preliminarily judged through the magnitude of the sampling current.
In order to better determine whether the reaction region 11 is full of blood, the position of the reaction region 11 near the inlet end and the position of the reaction region 11 near the bottom end can be detected respectively, and after the detection, the current sampling result includes a first current sampling result reflecting the current condition near the inlet end and a second current sampling result reflecting the current condition near the bottom end. At this time, when it is determined whether the current collecting result reaches the preset current threshold to obtain the threshold determination result, as shown in fig. 13, the specific steps performed include:
s41: and judging whether the first current sampling result reaches a preset first threshold value or not to obtain a first judgment result. Since the reaction of the blood in the reaction region 11 with the reagent continues, the first current sampling result is dynamic. The controller U1 of the body index detecting device makes a determination once per clock cycle until the first current sampling result reaches the first threshold value.
S42: if the first judgment result is yes, whether the second current sampling result reaches a preset second threshold value within the preset sampling time is judged, and a second judgment result is obtained. When the first determination result is yes, it indicates that there is enough blood input at the inlet end of the reaction region 11, and then the blood condition at the bottom end of the reaction region 11 is detected to determine whether the reaction region 11 is full of blood.
S43: if the second judgment result is yes, judging that the current acquisition result reaches a preset current threshold value; if the second judgment result is negative, the current acquisition result is judged not to reach the preset current threshold. The second determination result is that the reaction region 11 is full of blood and meets the condition for calculating the physical index.
S5: if the threshold judgment result is yes, calculating a corresponding body index value according to a preset algorithm based on the identification result and the current acquisition result. If the threshold judgment result is yes, namely the current acquisition result meets the calculation condition, the calculation program can be entered. If the identification result is that the test strip 1 is the blood sugar test strip 1, a program with a blood sugar index algorithm is called during calculation, and the current collection result is substituted into the algorithm program. Since the blood is required to react with the reagent in the reaction region 11 for a period of time before entering the reaction region 11 for stabilization, and the calculation after the reaction is stabilized can ensure the accuracy of the detection result as much as possible, it is preferable that the corresponding body index value is calculated according to a preset algorithm after the preset calculation time is reached. Specifically, the countdown may be set in the controller U1 according to the calculated time of the target, and the calculation may be performed after the countdown is completed.
S6: outputting the body index value. The controller U1 embodied as the body index detecting apparatus converts the calculation result into a signal that can be recognized by the cueing piece LCD1 of the body index apparatus, and the cueing piece LCD1 of the body index detecting apparatus displays a specific numerical value corresponding to the body index.
S7: and responding to the pulling-out operation of the user, and entering a power-off sleep state.
After the user pulls out the test strip 1, each terminal of the test strip 1 is no longer connected with the body index detection device, and the position for connecting the terminals of the test strip 1 is open in a paper strip identification module and a current collection module 3 of the body index detection device. After the controller U1 of the body index detection apparatus detects the open circuit condition, the power management module 4 of the body index detection apparatus is used to turn off the power supply, so that the body index detection apparatus enters the sleep-off state.
Example four
Referring to fig. 14, the difference between the present embodiment and the third embodiment is the specific steps of identifying the test strip 1. In this embodiment, the specific steps of identifying the test strip 1 are as follows:
s21: acquiring the color or the figure of the identification mark 17 on the test strip 1;
and S22, obtaining an identification result according to the preset corresponding relation between the type of the test strip 1 and the color or the figure based on the color or the figure of the identification mark 17.
The test paper 1 used in this embodiment is correspondingly printed with the identification mark 17, and the identification mark 17 is different in color or pattern on different types of test paper 1. The body index detection device shoots the identification mark 17 on the test strip 1 through the CCD camera 22 and identifies the color or the figure of the identification mark 17 by using an image analysis technology so as to know the type of the test strip 1.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A body index detection device characterized by: the device comprises a test strip identification module (2), a current collection module (3), a controller U1 and a prompting piece LCD 1;
the test strip identification module (2) is used for identifying the type of an external test strip (1) to obtain an identification result;
the current acquisition module (3) is used for detecting the current value of a test electrode of the external test strip (1) to obtain a current acquisition result;
the controller U1 is used for calculating a corresponding body index value according to a preset algorithm based on the identification result and the current acquisition result;
the prompt LCD1 is used for outputting the body index value.
2. A body index detection device according to claim 1, wherein: the test strip identification module (2) is a resistance value detection circuit for testing the identification resistor (16) of the external test strip (1).
3. A physical index sensing device in accordance with claim 2, wherein: the resistance value detection circuit comprises a reference voltage source (21) and a resistor R25, one end of the resistor R25 is connected with the output end of the reference voltage source (21), the other end of the resistor R25 is connected with the identification resistor (16) of the external test strip (1), the connection position between the identification resistor (16) of the external test strip (1) and the resistor R25 is a first connection point, and the first connection point is connected with a first input end of the controller U1.
4. A physical index sensing device in accordance with claim 1, wherein: the current acquisition module (3) comprises a first current sampling circuit (31) and a second current sampling circuit (32).
5. A body index detection device as claimed in claim 4, wherein: current acquisition module (3) includes constant voltage source (33), first current sampling circuit (31) includes resistance R3, operational amplifier U5D and voltage follower U5A, resistance R3's one end and operational amplifier U5D's negative input end all with the test electrode of outside test paper strip (1) is connected, the output of constant voltage source (33) with the positive input end of operational amplifier U5D is connected, resistance R3's the other end and operational amplifier U5D's output all with voltage follower U5A's input is connected, voltage follower U5A's output with the second input of controller U1 is connected.
6. A body index detection method is characterized in that: the method comprises the following steps:
identifying the type of the test strip (1) in response to the connection operation of a user to obtain an identification result;
detecting the current value of a test electrode of the test strip (1) to obtain a current acquisition result;
calculating a corresponding body index value according to a preset algorithm based on the identification result and the current acquisition result;
outputting the body index value.
7. The physical index detection method of claim 6, wherein: in identifying the type of the test strip (1) in response to a user's connection operation to obtain an identification result, the method comprises the steps of:
acquiring the resistance value of the identification resistor (16) of the test strip (1);
and obtaining a recognition result according to a preset corresponding relation between the type of the test strip (1) and the resistance value based on the resistance value.
8. The physical index detection method of claim 6, wherein: after the step of detecting the current value of the test electrode of the test strip (1) to obtain a current collection result, the body index detection method further comprises the following steps:
judging whether the current acquisition result reaches a preset current threshold value or not to obtain a threshold value judgment result;
and if the threshold judgment result is yes, executing the step of calculating the corresponding body index value according to a preset algorithm.
9. The physical index detection method of claim 8, wherein: the current acquisition result comprises a first current sampling result and a second current sampling result;
when judging whether the current acquisition result reaches a preset current threshold value so as to obtain a threshold value judgment result, the method comprises the following steps:
judging whether the first current sampling result reaches a preset first threshold value or not to obtain a first judgment result;
if the first judgment result is yes, judging whether the second current sampling result reaches a preset second threshold value within preset sampling time to obtain a second judgment result;
if the second judgment result is yes, judging that the current acquisition result reaches a preset current threshold value;
if the second judgment result is negative, the current acquisition result is judged that the current acquisition result does not reach the preset current threshold.
10. The physical index detection method of claim 8, wherein: if the threshold judgment result is yes, the step of calculating the corresponding body index value according to the preset algorithm is executed after the preset calculation time is reached.
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