Constant temperature testing device for CGM sensor
By using a small-batch CGM sensor constant temperature testing device, which utilizes the insertion and matching of the base and test seat, as well as multi-point temperature sensing probes and independent heating zones, the problems of poor constant temperature control accuracy and insufficient temperature uniformity in the mass production of CGM sensors are solved, thereby improving the accuracy and yield of test data.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-09
- Publication Date
- 2026-04-10
AI Technical Summary
In the current mass production process of CGM sensors, poor temperature control accuracy and insufficient temperature uniformity lead to problems such as test data deviation and low yield.
A small-batch CGM sensor constant temperature testing device is adopted. Through the insertion and matching of the base and the test seat, the clamping slot firmly holds the sensor board, limiting the number of electrodes to be tested. Combined with a small-volume solution tank, multi-point temperature sensing probe and independent heating zone, precise temperature control is achieved.
This improved the accuracy and overall yield of CGM sensor test data, reduced mutual interference between electrodes, and enhanced operational efficiency and temperature control accuracy.
Smart Images
Figure CN224109402U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a CGM sensor constant temperature testing device. BACKGROUND
[0002] With the continuous rise of global diabetes prevalence, and the popularity and demand explosion of digital health management concept, continuous glucose monitoring CGM technology has developed rapidly, and the CGM market has entered a period of rapid growth. As the core component of the continuous glucose monitoring system, the performance consistency, long-term stability and production yield of the CGM sensor directly determine the use effect and market competitiveness of the product, and temperature control is a decisive process parameter throughout the production process of the CGM sensor. The control precision and stability of this parameter play a key role in the final performance of the sensor, and its control covers all aspects of raw material storage, ink preparation, coating and curing, later aging and terminal electrochemical testing. Among them, in the terminal test stage of the CGM sensor, the electrode of the sensor needs to be tested for micro-current in a solution environment with different glucose concentrations. The constant temperature control precision of the glucose solution directly affects the accuracy of the micro-current detection data, and is one of the core factors that determine the test yield of the sensor. Therefore, the industry has continuously improved the temperature control precision of this stage.
[0003] At present, in the terminal test of batch production of CGM sensors, the mainstream scheme in the industry is to put a large number of CGM sensors into a constant temperature large water tank corresponding to the glucose concentration to complete the electrochemical test. However, this traditional scheme has significant technical defects: on the one hand, the solution capacity of the large water tank is large and the area is large, which makes it difficult to achieve precise constant temperature control by the traditional heating method, not only the constant temperature control precision is poor, but also the temperature uniformity in the solution is insufficient; on the other hand, a large number of sensors are tested synchronously in the same water tank solution, and mutual interference between the sensors easily occurs, further causing deviation of the test data, and finally resulting in low test yield of the CGM sensor, which cannot meet the needs of high-quality production of the industry.
[0004] Therefore, how to overcome the above-mentioned defects has become an important topic for the technical personnel in the field to solve. UTILITY MODEL CONTENT
[0005] The utility model overcomes the above-mentioned technical defects, and provides a CGM sensor constant temperature testing device.
[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0007] The application discloses a constant temperature testing device for CGM sensor, which comprises a base 1 and a testing seat 2, a connecting groove 3 is formed between the left and right ends of the base 1 for inserting the testing seat 2, a solution groove 4 is arranged on the base 1 and extends along the left and right directions and opens upwards for containing glucose solution, a clamping groove 5 is arranged at the lower end of the testing seat 2, the clamping groove 5 is used for clamping and electrically connecting a sensor plate 6 to be tested, a plurality of electrodes 61 to be tested are arranged on the sensor plate 6 to be tested and extend downwards into the solution groove 4, the number of the electrodes 61 to be tested is less than or equal to 20, a heater 7 is wrapped on the outer wall surface of the solution groove 4, and a plurality of temperature sensing probes 8 extend into the solution groove 4.
[0008] Preferably, the base 1 at one of the left and right ends of the solution groove 4 is fixed with a liquid inlet pipe 9 and a liquid outlet pipe 10 which extend into the solution groove 4, the liquid inlet pipe 9 is used for connecting an external glucose solution source so as to input glucose solution, and the liquid outlet pipe 10 is used for connecting an external waste liquid pipeline so as to draw away the glucose solution from the solution groove 4 after the test is completed.
[0009] Preferably, the number of the temperature sensing probes 8 is proportional to the number of the electrodes 61 to be tested at a ratio of 1:4 to 1:1.
[0010] Preferably, a first docking interface 31 in electrical communication with an external testing circuit is arranged in the connecting groove 3, a second docking interface 21 corresponding to the position of the first docking interface 31 is arranged on the testing seat 2, a connecting circuit for connecting each electrode 61 to be tested and the second docking interface 21 is arranged in the testing seat 2, and the first docking interface 31 and the second docking interface 21 are in communication after the testing seat 2 is inserted into the connecting groove 3 so as to electrically connect each electrode 61 to be tested and the external testing circuit.
[0011] Preferably, the width of the solution groove 4 in the front and back directions is 48 to 52 times the thickness of the electrodes 61 to be tested in the front and back directions.
[0012] Preferably, the distance between adjacent electrodes 61 to be tested is 30 to 40 times the width of the electrodes 61 to be tested in the left and right directions.
[0013] Preferably, the liquid outlet of the liquid inlet pipe 9 is at the same height as the highest liquid level of the solution groove 4.
[0014] Preferably, the liquid outlet pipe 10 extends to the bottom of the solution groove 4, and the bottom surface of the solution groove 4 gradually rises from one end where the liquid outlet pipe 10 is located to the other end.
[0015] Preferably, a lifting handle 22 is arranged on the top of the testing seat 2.
[0016] Preferably, the heater 7 comprises a plurality of independent heating zones which can independently control the heating power, and the independent heating zones correspond to the positions of the temperature sensing probes 8 one by one.
[0017] Preferably, the clamping groove 5 is provided with a heating sheet 51 on the inner wall surface of the front and rear sides, which is used for heating the sensor board 6 to be tested.
[0018] Compared with the prior art, the utility model has the beneficial effects that:
[0019] The test device of the utility model can be easily disassembled and assembled through the plug-in cooperation of the base and the test seat, so that the test device can adapt to the test efficiency of the batch production of CGM sensors, and the test seat can stably clamp the sensor board to be tested through the clamping groove. Meanwhile, the utility model limits the number of test electrodes on the sensor board to be tested to ≤20, so that only a small batch of test electrodes is tested at a time, the test density can be reduced, the mutual interference between the test electrodes can be avoided in structure, and the volume of the solution tank can be reduced to reduce the use amount of glucose solution. In addition, on the basis of using a small volume solution tank, the utility model also wraps a heater on the outer wall of the solution tank to uniformly heat the solution tank, and cooperates with the multi-point distributed temperature sensing probe to accurately capture the temperature change in the solution tank, provides reliable data for constant temperature control, and solves the problems of poor constant temperature precision and insufficient temperature uniformity in the traditional large tank test, and improves the accuracy of CGM sensor test data and the overall test yield. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 is one of the schematic diagrams of the test device of the utility model, wherein the base and the test seat have been connected in place.
[0021] Figure 2 is the second schematic diagram of the test device of the utility model, wherein the base and the test seat have been separated.
[0022] Figure 3 is an exploded schematic diagram of the test seat of the utility model.
[0023] Figure 4 is a cross-sectional schematic diagram of the base of the utility model. DETAILED DESCRIPTION
[0024] The features and other related features of the utility model are further described in detail through the following examples, so as to facilitate the understanding of the technical personnel in the same industry:
[0025] For example, Figures 1 to 4As shown, a CGM sensor constant temperature testing device includes a base 1 and a testing seat 2, a connecting groove 3 is formed between the left and right ends of the base 1 for inserting the testing seat 2, a solution groove 4 is arranged on the base 1 and extends left and right and opens upward for accommodating glucose solution, a clamping groove 5 is arranged at the lower end of the testing seat 2, the clamping groove 5 is used for clamping and electrically connecting a sensor board 6 to be tested, a plurality of electrodes 61 to be tested are arranged on the sensor board 6 to be tested and extend downward into the solution groove 4, the number of the electrodes 61 to be tested is less than or equal to 20, a heater 7 is wrapped on the outer wall surface of the solution groove 4, and a plurality of temperature sensing probes 8 extending into the solution groove 4 are arranged on the base 1.
[0026] The testing device includes a base 1 and a testing seat 2, which are combined through plug-in structure, wherein the base 1 is provided with a connecting groove 3 for inserting the testing seat 2. The lower end of the testing seat 2 is provided with a clamping groove 5, through which the sensor board 6 to be tested can be fixedly connected to the testing seat 2, and the base 1 is also provided with a solution groove 4, so that the electrodes 61 to be tested extending downward from the sensor board 6 to be tested will extend into the solution groove 4 after the base 1 and the testing seat 2 are connected in place, so that the electrodes 61 to be tested can be tested. On this basis, the testing device is also provided with a plurality of temperature sensing probes 8 extending into the solution groove 4 on the base 1 for monitoring the temperature at different positions in the solution groove 4. Correspondingly, a heater 7 is wrapped on the outer wall surface of the solution groove 4. The heater 7 adjusts the heating power in real time according to the temperature monitored by the temperature sensing probe 8, so as to improve the stability of the temperature of the glucose solution. In addition, the testing device also limits the number of electrodes 61 to be tested on the sensor board 6 to be tested to be ≤20.
[0027] As described above, the testing device can be easily disassembled by plug-in cooperation of the base 1 and the testing seat 2, so that the testing device can adapt to the testing efficiency of batch production of CGM sensors. The testing seat 2 stably clamps the sensor board 6 to be tested through the clamping groove 5. At the same time, the testing device also limits the number of electrodes 61 to be tested on the sensor board 6 to be tested to be ≤20, so that only a small batch of electrodes 61 to be tested is tested at a time, which can reduce the testing density, avoid mutual interference between the electrodes 61 to be tested from the structure, and also can reduce the volume of the solution groove 4 and the use amount of glucose solution. In addition, on the basis of using a small volume solution groove 4, the testing device also wraps a heater 7 on the outer wall of the solution groove 4, so as to complete uniform heating of the solution groove 4, and cooperate with the multi-point distributed temperature sensing probe 8, which can accurately capture the temperature change in the solution groove 4, provide reliable data for constant temperature control, and solve the problems of poor constant temperature precision and insufficient temperature uniformity in traditional large water tank testing, and improve the accuracy of CGM sensor testing data and the overall testing yield.
[0028] As Figure 1 , Figure 2 and Figure 4 shown, preferably, the base 1 at one end of the solution tank 4 is fixed with a liquid inlet pipe 9 and a liquid outlet pipe 10 extending into the solution tank 4, the liquid inlet pipe 9 is used to connect the external glucose solution source to facilitate the input of glucose solution, and the liquid outlet pipe 10 is used to connect the external waste liquid pipeline to facilitate the removal of glucose solution from the solution tank 4 after the test is completed.
[0029] As described above, the base 1 at the end of the solution tank 4 of the case is also provided with the liquid inlet pipe 9 and the liquid outlet pipe 10. By connecting the liquid inlet pipe 9 and the liquid outlet pipe 10 with the external liquid supply and discharge equipment respectively, the automatic filling and discharge of glucose solution can be realized, replacing the traditional manual filling and pouring operation, greatly improving the operation efficiency of CGM sensor batch testing. At the same time, it can also reduce the link of manual contact with the solution, avoid the problems of solution concentration fluctuation and liquid level deviation caused by manual operation, so as to ensure the stability of the test environment and reduce the test error caused by human operation. Moreover, by automating the filling and discharge of glucose solution, the replacement speed of glucose solution can be significantly improved, further improving the continuity and convenience of CGM sensor continuous testing under different glucose concentrations.
[0030] As Figures 2 to 4 shown, preferably, the number of temperature sensing probes 8 is 1:4 to 1:1 of the number of electrodes to be tested 61.
[0031] As described above, the test device of the case limits the ratio of temperature sensing probes 8 to electrodes to be tested 61 to between 1:4 and 1:1, which can balance the accuracy and economy of temperature detection. It can not only monitor the temperature of the solution in the solution tank 4 at multiple points, accurately reflect the temperature at each test position of the electrode to be tested 61, and timely adjust the power of the heater 7 when the temperature is uneven, so as to improve the temperature control accuracy and temperature uniformity of the glucose solution, but also will not cause cost increase due to structural redundancy caused by excessive number of temperature sensing probes 8. It provides accurate and economical monitoring data for constant temperature control of glucose solution, and makes up for the short board of inaccurate temperature monitoring in traditional large tank test.
[0032] As Figures 2 to 4 shown, preferably, the connecting groove 3 is provided with a first docking interface 31 in electrical communication with the external test circuit, the test seat 2 is provided with a second docking interface 21 corresponding to the position of the first docking interface 31, and the test seat 2 is provided with a connecting circuit for connecting each electrode to be tested 61 and the second docking interface 21. After the test seat 2 is inserted into the connecting groove 3, the first docking interface 31 and the second docking interface 21 are in communication to facilitate the electrical communication between each electrode to be tested 61 and the external test circuit.
[0033] As described above, the connecting groove 3 is also provided with a first docking interface 31, and the test seat 2 is provided with a second docking interface 21. However, after the test seat 2 is inserted into the connecting groove 3, the first docking interface 31 and the second docking interface 21 will be docked synchronously to enable the electrodes 61 to be connected to the external test circuit to form a complete test loop. By using the plug-in docking interface instead of manual wiring, the efficiency of the test seat 2 can be improved, the replacement of the sensor board 6 to be tested can be facilitated, and the operation difficulty of the operator can be reduced.
[0034] Specifically, the connecting circuit is a conventional circuit design form in the field of electrical signal transmission. Those skilled in the art can adapt the wiring layout and structure of the connecting circuit according to the number and arrangement of the electrodes 61 to be tested and the electrical signal transmission requirements of the CGM sensor test, so as to realize stable electrical communication between the electrodes 61 to be tested and the second docking interface 21 and meet the test circuit connection requirements.
[0035] As shown in Figure 2 Preferably, the width of the solution tank 4 in the front-rear direction is 48 to 52 times the thickness of the electrodes 61 to be tested in the front-rear direction. In this way, sufficient test space can be provided for the electrodes 61 to be tested to ensure that the electrodes 61 to be tested are in full contact with the glucose solution, avoid poor contact between the electrodes 61 to be tested and the glucose solution due to insufficient space, and ensure smooth testing. In addition, the width of the solution tank 4 will not be too large to cause unnecessary consumption of the glucose solution. Therefore, the amount of glucose solution can be further optimized under the premise of ensuring the test effect, and the test cost can be optimized.
[0036] As shown in Figure 2 and Figure 3 Preferably, the distance between adjacent electrodes 61 to be tested is 30 to 40 times the width of the electrodes 61 to be tested. In this way, sufficient test distance can be ensured between adjacent electrodes 61 to be tested to reduce mutual interference of the CGM sensor electrodes during testing from the structure, and solve the problem of data deviation caused by excessive electrodes 61 to be tested and insufficient spacing in the traditional large tank test. At the same time, this spacing design will not cause redundancy, and can balance the test effect and efficiency. In addition, the test data accuracy and test yield can be improved, and the production test can also be adapted to batch production.
[0037] As shown in Figure 4 Preferably, the outlet height of the liquid inlet pipe 9 is level with the highest liquid level of the solution tank 4. In this way, the external glucose solution source can realize quantitative filling of the glucose solution by monitoring the change of the liquid inlet pressure, avoid waste caused by excessive filling of the glucose solution, or ensure that the electrodes 61 to be tested are in full contact with the glucose solution due to insufficient filling of the glucose solution, and thus ensure the standardization of the test.
[0038] As shown in Figure 4As shown, preferably, the liquid discharge pipe 10 extends to the bottom of the solution tank 4, and the bottom surface of the solution tank 4 gradually rises from one end where the liquid discharge pipe 10 is located to the other end.
[0039] As described above, by matching the bottom surface of the solution tank 4 arranged in an inclined manner and the liquid discharge pipe 10 extending to the bottom of the solution tank 4, the residual glucose solution in the solution tank 4 can flow along the inclined surface to the liquid discharge pipe 10 during liquid discharge, so that the glucose solution can be completely discharged, the influence of residual waste liquid on subsequent tests of different concentrations of glucose solution is reduced, the purity of the test conditions under each concentration is improved, the test error caused by solution pollution is reduced, and the reliability of the test data is improved.
[0040] As shown in the drawings, Figures 1 to 3 As shown, preferably, the test seat 2 is provided with a lifting handle 22 at the top, so that a convenient force point is provided for disassembly and assembly of the test seat 2, and the operator can more easily and quickly complete the disassembly and assembly of the test seat 2, further improving the replacement efficiency of the test seat 2. Moreover, disassembly and assembly of the test seat 2 through the lifting handle 22 can make the taking and placing process of the test seat 2 more stable, so as to reduce the damage of the to-be-tested sensor board 6 caused by bumping.
[0041] Preferably, the heater 7 includes a plurality of independent heating zones capable of independently regulating heating power, and the independent heating zones correspond one-to-one to the positions of the temperature sensing probes 8.
[0042] As described above, the heater 7 of the present case includes a plurality of independent heating zones capable of independently regulating heating power, which correspond one-to-one to the positions of the temperature sensing probes 8, so that the zoned precise temperature control of the solution tank 4 can be realized. Each independent heating zone can change the heating power in real time and independently according to the temperature feedback of the corresponding temperature sensing probe 8, and can accurately compensate for the temperature difference at different positions in the solution tank 4. In this way, the problem of local temperature unevenness that is prone to occur in the overall heating can be effectively solved, the temperature uniformity and the precision of constant temperature control of the glucose solution in the solution tank 4 are further improved, and the high-precision constant temperature requirement of the test is met. At the same time, zoned temperature control can also realize on-demand heating, avoid unnecessary overall heating, and save energy. The temperature control precision and energy saving performance can be taken into account.
[0043] Specifically, the heat source of the heater 7 can be a conventional heating element in the temperature control field, and the independent heating zones are realized by arranging a plurality of independent heating elements.
[0044] As shown in the drawings, Figure 3 As shown, preferably, the heating sheet 51 is further arranged on the inner wall surface of the front and rear sides of the clamping groove 5, and the heating sheet 51 is used for heating the to-be-tested sensor board 6.
[0045] As described above, on the basis of constant temperature control of the glucose solution, the test device of the case also increases the direct constant temperature heating of the sensor plate 6 to be tested by setting the heating sheet 51 in the clamping groove 5, so that the temperature difference between the sensor plate 6 to be tested and the glucose solution can be avoided to cause the micro-current detection deviation. The glucose solution and the sensor plate 6 to be tested are double-dimensionally controlled, so that the temperature consistency of the CGM sensor test can be greatly improved. Moreover, the heating sheet 51 is arranged on the inner wall of the clamping groove 5 and can be in contact with the surface of the sensor plate 6 to be tested, so that the uniform heating of the sensor plate 6 to be tested is realized, the overall temperature consistency of the sensor plate 6 to be tested is ensured, and the local temperature difference of the sensor plate 6 to be tested affecting the test result is further avoided.
[0046] Specifically, the heating sheet 51 selects a conventional heating element in the heating field, and those skilled in the art can select an existing element that can be adapted according to the size specification of the clamping groove 5 and the heating requirement of the sensor plate 6 to be tested.
[0047] As described above, the protection of the case is a CGM sensor constant temperature test device, and all technical solutions the same as or similar to the case should be considered to fall within the protection scope of the case.
Claims
1. A CGM sensor constant temperature testing device, characterized in that The base (1) and the test seat (2) are included, the connecting groove (3) is formed between the left and right ends of the base (1) for inserting the test seat (2), the solution groove (4) is provided on the base (1) and extends along the left and right directions, and the solution groove (4) is open upward and used for accommodating the glucose solution, the clamping groove (5) is provided at the lower end of the test seat (2), the clamping groove (5) is used for clamping and electrically connecting the sensor plate (6) to be tested, a plurality of to-be-tested electrodes (61) are provided on the sensor plate (6) to be tested and extend downward into the solution groove (4), the number of the to-be-tested electrodes (61) is less than or equal to 20, the outer wall surface of the solution groove (4) is wrapped with the heater (7), and a plurality of temperature sensing probes (8) extending into the solution groove (4) are further provided on the base (1).
2. The CGM sensor constant temperature testing device according to claim 1, characterized in that The base (1) on one side of the solution groove (4) is fixed with the liquid inlet pipe (9) and the liquid outlet pipe (10) extending into the solution groove (4), the liquid inlet pipe (9) is used for connecting an external glucose solution source to input the glucose solution, and the liquid outlet pipe (10) is used for connecting an external waste liquid pipeline to draw away the glucose solution from the solution groove (4) after the test is completed.
3. The CGM sensor constant temperature testing device according to claim 1, characterized in that The number of the temperature sensing probes (8) and the number of the to-be-tested electrodes (61) are in a ratio of 1:4 to 1:
1.
4. The CGM sensor constant temperature testing device according to claim 1, characterized in that The first docking interface (31) in electrical communication with an external test circuit is arranged in the connecting groove (3), the second docking interface (21) corresponding to the position of the first docking interface (31) is arranged on the test seat (2), the connecting circuit for connecting each to-be-tested electrode (61) and the second docking interface (21) is arranged in the test seat (2), and the first docking interface (31) and the second docking interface (21) are in docking communication after the test seat (2) is inserted into the connecting groove (3) to be in place, so that each to-be-tested electrode (61) is in electrical communication with the external test circuit.
5. The CGM sensor constant temperature testing device according to claim 1, characterized in that The width of the solution groove (4) in the front-rear direction is 48 to 52 times the thickness of the to-be-tested electrode (61) in the front-rear direction.
6. The CGM sensor constant temperature testing device according to claim 1, characterized in that The distance between adjacent to-be-tested electrodes (61) is 30 to 40 times the left-right width of the to-be-tested electrode (61).
7. The CGM sensor constant temperature testing device according to claim 2, characterized in that The liquid outlet of the liquid inlet pipe (9) is level with the highest liquid level of the solution groove (4). The liquid outlet pipe (10) extends to the bottom of the solution groove (4), and the bottom surface of the solution groove (4) gradually rises from one end where the liquid outlet pipe (10) is located to the other end.
8. The CGM sensor constant temperature testing device according to claim 1, characterized in that The test seat (2) is provided with a pull handle (22) on the top.
9. The CGM sensor constant temperature testing device according to claim 1, characterized in that The heater (7) includes a plurality of independent heating zones capable of independently regulating heating power, and the independent heating zones correspond one by one to the positions of the temperature sensing probes (8).
10. The CGM sensor constant temperature testing device according to claim 1, characterized in that The heating sheet (51) is further arranged on the inner wall surface of the front and rear sides of the clamping groove (5), and the heating sheet (51) is used for heating the sensor plate (6) to be tested.