Colloidal gold test strip detector

Abstract

The utility model relates to the technical field of colloidal gold detection, in particular to a colloidal gold test strip detector which comprises a shell, a control module, a test strip conveying module, a reagent filling module, an infrared laser heating module, an image acquisition module and a thermal imaging module, the test strip conveying module, the reagent filling module, the image acquisition module, the infrared laser heating module, the thermal imaging module and the control module are all mounted in the shell, and the test strip conveying module, the reagent filling module, the infrared laser heating module, the image acquisition module and the thermal imaging module are all connected with the control module; and the shell is also provided with an insertion hole into which the colloidal gold test strip can extend. For colloidal gold test strips capable of absorbing infrared bands and developing at the same time, the colloidal gold test strip detector disclosed by the utility model can be used for developing detection and infrared detection at the same time, so that the detection period of the colloidal gold test strips is shortened, colloidal gold particles can be prevented from being oxidized in the detection process, and the accuracy of a detection result is improved.

Description

A colloidal gold test strip detector Technical Field

[0001] This utility model relates to the technical field of colloidal gold detection, and more specifically, to a colloidal gold test strip detector. Background Technology

[0002] Currently, colloidal gold test strips are widely used as rapid detection tools in food and health safety testing. In most cases, colloidal gold detection involves visual observation or optical reading after the colloidal gold reagent has developed the color, which is not only unstable but also easily affected by background factors during color reading. To avoid errors in interpreting colloidal gold color results, colloidal gold particles that absorb infrared waves have been put into use, allowing for the acquisition of detection results based on the infrared reflection data. However, the infrared absorption intensity of these infrared-absorbing colloidal gold particles is relatively weak, resulting in low accuracy and difficulty in achieving high-precision quantitative analysis.

[0003] To further improve the detection accuracy of colloidal gold test strips, colloidal gold particles that can simultaneously absorb infrared wavelengths and produce color development are now in use. These particles perform well in both color development and infrared detection, and can be used to perform both simultaneously, allowing for comparison of the two results to further verify the accuracy of the results and improve the precision of the detection.

[0004] However, when verifying the high-precision detection results of colloidal gold particles that can simultaneously absorb infrared wavelengths and produce color, the instruments used for color detection and infrared detection are different, requiring two sets of devices to be used for detection separately. The detection process is cumbersome and time-consuming. Furthermore, colloidal gold particles are prone to oxidation after contact with air during the detection process, leading to errors in the detection results. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies that require two sets of devices for high-precision detection of colloidal gold particles that can simultaneously absorb infrared wavelengths and develop color, resulting in a cumbersome and time-consuming detection process, and are also prone to errors in detection results due to oxidation of colloidal gold reagents. This invention provides a colloidal gold test strip detector that can simultaneously complete colorimetric detection and infrared detection with a single device, reducing detection time and avoiding errors in detection results caused by reagent oxidation.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A colloidal gold test strip detector is provided, comprising a housing, a control module, a test strip delivery module for delivering the colloidal gold test strip to the detection position, a reagent dispensing module for dispensing reagents onto the colloidal gold test strip, an infrared laser heating module for heating the detection area of ​​the colloidal gold test strip, an image acquisition module for acquiring colorimetric information of the colloidal gold test strip, and a thermal imaging module for acquiring thermal signals of the detection area of ​​the colloidal gold test strip. The test strip delivery module, reagent dispensing module, image acquisition module, infrared laser heating module, thermal imaging module, and control module are all installed within the housing. The test strip delivery module, reagent dispensing module, infrared laser heating module, image acquisition module, and thermal imaging module are all connected to the control module. The housing also has an insertion hole for the colloidal gold test strip to extend into. The thermal imaging module can be a Flir Lepton 3.5 thermal imager; the infrared laser heating module can be a 500mW linear infrared laser heater; and the image acquisition module can be an image acquisition camera with a built-in illumination light.

[0008] In use, the colloidal gold test strip detector of this invention first fixes the colloidal gold test strip to be tested onto the test strip delivery module. Then, the control module controls the test strip delivery module to transport the colloidal gold test strip to the designated detection position inside the housing. After the colloidal gold test strip is transported to the designated detection position, the control module controls the reagent dispensing module to add a quantitative amount of colloidal gold detection reagent to the colloidal gold test strip. After the detection reagent is added, a corresponding detection reaction occurs on the colloidal gold test strip, i.e., a color reaction occurs while absorbing infrared light. After the colloidal gold test reagent is added to the colloidal gold test strip, the control module first controls the image acquisition module to acquire the color information on the colloidal gold test strip and transmits the acquired color information back to the control module. Then, the infrared laser heating module is controlled to heat the detection area of ​​the colloidal gold test strip with infrared light, and the thermal imaging module is used to acquire the thermal signal of the detection area of ​​the colloidal gold test strip. The thermal imaging module generates a high-precision thermal image based on the thermal information of the detection area of ​​the colloidal gold test strip, converts the signal into a digital image, and transmits it to the control module. The control module comprehensively judges the detection result of the colloidal gold test strip based on the color information transmitted back by the image acquisition module and the digital thermal image transmitted back by the thermal imaging module.

[0009] This invention relates to a colloidal gold test strip detector that can simultaneously perform colorimetric and infrared detection on colloidal gold test strips that can absorb infrared wavelengths and develop color. This avoids the need for two separate detection devices, shortens the detection cycle of such colloidal gold test strips, and also prevents oxidation of colloidal gold particles during the detection process, thus improving the accuracy of the detection results.

[0010] Furthermore, the reagent dispensing module includes a dispensing tube and a first driving unit fixedly installed inside the housing cavity. The first driving unit is connected to the control module. The inner cavity of the dispensing tube is provided with a piston that can slide along the axis of the dispensing tube. The side wall of the piston is tightly fitted with the side wall of the inner cavity of the dispensing tube. The piston is fixedly connected to the output end of the first driving unit. The side wall of the dispensing tube is provided with an inlet and an outlet. The inlet is connected to an inlet pipe extending to the outside of the housing. The inlet pipe is provided with a valve. The inner cavity of the housing is movably connected with a blocking part that can block the outlet. The blocking part can switch between a closed state blocking the outlet and an open state offset from the outlet. When performing colloidal gold test strip detection, the blocking part is in the open state, the valve on the inlet pipe is in the closed state, the control module controls the first driving unit to work, and the output end of the first driving unit squeezes the piston, causing the piston to be pushed to squeeze the reagent in the dispensing tube. The reagent is squeezed out along the outlet and drips onto the detection area of ​​the colloidal gold test strip. After the colloidal gold test strip completes the test, the plug switches to a closed state, re-plugging the outlet to prevent oxidation of the test reagent. Simultaneously, during reagent addition, the control module controls the forward distance of the piston driven by the first drive unit to precisely control the amount of test reagent added, ensuring consistent reagent dosage for repeated tests. When adding reagent to the inner cavity of the filling tube, after connecting the inlet tube to the reagent, opening the valve on the inlet tube causes the control module to move the first drive unit in the opposite direction, and the piston moves in the opposite direction. Since the outlet is now plugged, the reagent can enter the inner cavity of the filling tube under air pressure, completing the reagent addition process.

[0011] Furthermore, the first drive unit is a telescopic electric cylinder with adjustable stroke. Telescopic electric cylinders are small in size and have high adjustment precision, therefore, a telescopic electric cylinder with adjustable stroke is selected as the first drive unit. Alternatively, a telescopic pneumatic cylinder with adjustable stroke can also be selected.

[0012] Furthermore, the test strip delivery module includes a chute, a slider, and a second drive unit. The chute is located at the bottom of the inner cavity of the housing, and the slider is located within the chute and slidably connected to it. The slider has a slot for accommodating the colloidal gold test strip. The slider can slide on the chute until the slot abuts against the insertion hole. The second drive unit is connected to the control module, and the slider is connected to the drive end of the second drive unit. When the slider slides on the chute, it can push the blocking part to be misaligned from the outlet. The second drive unit drives the slider to slide on the chute. When the slider slides to the end of the chute near the insertion hole, the slot on the slider aligns with the insertion hole on the housing, and the colloidal gold test strip to be tested can be inserted into the slot through the insertion hole. When the slider slides to the end of the chute away from the insertion hole, the slider can push the blocking part to be misaligned, and the outlet is in an open state. At this time, the colloidal gold test strip in the slot is in the test position, and the test reagent flowing from the outlet of the dispensing tube can drip onto the colloidal gold test strip. Switching between the open and closed states of the blocking section by sliding the slider reduces the need for a power source to drive the blocking section, lowers costs, and improves the utilization of the internal space of the housing.

[0013] Furthermore, the second driving unit includes a rotary motor, a screw, and a connecting block. The screw is installed at the bottom of the inner cavity of the slide groove and is rotatably connected to the slide groove. The connecting block is installed inside the slide groove and is threadedly connected to the screw. The top surface of the connecting block is fixedly connected to the bottom surface of the slider. The rotary motor is fixedly connected to the housing, and the screw is fixedly connected to the output end of the rotary motor. The control module is connected to the rotary motor. The control module controls the rotary motor to operate, and the rotary motor drives the screw to rotate. After the screw rotates, it drives the slider to slide in the slide groove towards or away from the insertion hole through the connecting block.

[0014] Furthermore, one end of the plugging part is rotatably connected to the housing, and the other end is connected to an elastic element. In the vertical direction, the end of the plugging part connected to the elastic element is located above the slot. The elastic element is a compression spring, and a silicone pad is provided at the end of the plugging part that can block the liquid outlet. When the elastic element is in the initial state, that is, the plugging part is in a misaligned state, the axis of the plugging part intersects the axis of the slide groove in a non-plane manner. That is, at this time, the plugging part can prevent the slider from sliding along the slide groove. When the slider slides to abut against the plugging part, the slider continues to slide, compressing the elastic element and pushing the plugging part to rotate inside the housing to the liquid outlet of the misaligned filling tube. When the slider returns to its original position, the plugging part returns to its original position under the action of the elastic element.

[0015] Furthermore, the slot has a clip at the end away from the insertion hole for holding the colloidal gold test strip. The clip is rotatably connected to the slot, and a torsion spring is provided between the clip and the slot. An abutment protrusion is provided on the side wall of the housing, which abuts against the clip and drives it to rotate within the slot. The end face of the clip near the insertion hole is an inclined plane, which slopes away from the insertion hole at the end near the slot. The abutment protrusion has a first plane that fits against this inclined plane. When the slider slides towards the insertion hole, the inclined plane on the clip first abuts against the first plane on the abutment protrusion. As the slider continues to slide, it compresses the torsion spring, causing the clip to rotate on the slot. The abutment protrusion then lifts the clip, allowing the operator to insert the colloidal gold test strip into the slot through the insertion hole. When the slider slides in the opposite direction, the clip returns to its original position under the action of the torsion spring, holding the colloidal gold test strip within the slot. The clip design prevents the colloidal gold test strip from falling out of the slot.

[0016] Furthermore, the slot is provided with a limiting block that can abut against the colloidal gold test strip, and the clamp is rotatably connected to the limiting block. The limiting block limits the length of the colloidal gold test strip inserted into the slot. Specifically, the length from the limiting block to the end face of the slot is less than the length of the colloidal gold test strip, so that a portion of the colloidal gold test strip is located outside the housing when inserted, making it easy for the operator to pull out the colloidal gold test strip after it has been dispensed.

[0017] Furthermore, the outlet is conical. The conical shape of the outlet allows the droplets flowing out to drip slowly, while also reducing the contact area between the reagent and air at the outlet.

[0018] Furthermore, the housing is provided with an observation window, which is transparent, and a light-shielding cover is provided on the observation window, which is rotatably connected to the housing. Operators can observe the interior of the housing through the transparent window to determine whether the various components inside the housing are functioning properly. The light-shielding cover blocks light from entering the housing, preventing reagents from decomposing upon exposure to light.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This invention relates to a colloidal gold test strip detector that can simultaneously perform colorimetric and infrared detection on colloidal gold test strips that can absorb infrared wavelengths and develop color. This avoids the need for two separate detection devices, shortens the detection cycle of such colloidal gold test strips, prevents oxidation of colloidal gold particles during the detection process, and improves the accuracy of the detection results. Attached Figure Description

[0021] Figure 1 is a schematic diagram of the internal structure of a colloidal gold test strip detector;

[0022] Figure 2 is a schematic diagram of the internal structure of a colloidal gold test strip detector from another angle;

[0023] Figure 3 is a schematic diagram of a colloidal gold test strip detector;

[0024] Figure 4 is a schematic diagram of the test strip delivery module and reagent dispensing module of a colloidal gold test strip detector;

[0025] Figure 5 is a schematic diagram of the test strip delivery module and reagent dispensing module of a colloidal gold test strip detector from another angle;

[0026] Figure 6 is a schematic diagram of the working status of the test strip delivery module and reagent dispensing module of a colloidal gold test strip detector during reagent dispensing;

[0027] Figure 7 is a schematic diagram of the working state of the test strip delivery module and reagent dispensing module of a colloidal gold test strip detector when the test strip is inserted.

[0028] Figure 8 is a cross-sectional view of the working state of a colloidal gold test strip detector when the clamping block and the abutting protrusion are in contact.

[0029] Figure 9 is a cross-sectional view of the working state of a colloidal gold test strip detector when the abutting protrusion lifts the clamping block.

[0030] In the attached diagram: 1. Housing; 2. Test strip delivery module; 3. Reagent dispensing module; 4. Infrared laser heating module; 5. Image acquisition module; 6. Thermal imaging module; 101. Insertion hole; 301. Dispensing tube; 302. First drive unit; 303. Piston; 7. Blocking unit; 201. Slide groove; 202. Slider; 203. Second drive unit; 221. Slot; 231. Rotary motor; 232. Screw; 233. Connecting block; 8. Elastic element; 9. Clamping piece; 102. Abutment protrusion; 222. Limiting block; 311. Liquid inlet; 312. Liquid outlet; 10. Light-shielding cover. Detailed Implementation

[0031] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0032] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0033] Example 1

[0034] This embodiment is a first embodiment of a colloidal gold test strip detector, as shown in Figures 1-3. It includes a housing 1, a control module (not shown in the figures), a test strip delivery module 2 for delivering the colloidal gold test strip to the detection position, a reagent dispensing module 3 for dispensing reagents onto the colloidal gold test strip, an infrared laser heating module 4 for heating the detection area of ​​the colloidal gold test strip, an image acquisition module 5 for acquiring colorimetric information of the colloidal gold test strip, and a thermal imaging module 6 for acquiring thermal signals of the detection area of ​​the colloidal gold test strip. The test strip delivery module 2, reagent dispensing module 3, image acquisition module 5, infrared laser heating module 4, thermal imaging module 6, and control module are all installed inside the housing 1. The test strip delivery module 2, reagent dispensing module 3, infrared laser heating module 4, image acquisition module 5, and thermal imaging module 6 are all connected to the control module for control of their operation. The housing 1 is also provided with an insertion hole 101 for the colloidal gold test strip to be inserted. Among them, thermal imaging module 6 is a FlirLepton 3.5 thermal imager; infrared laser heating module 4 is a 500mW linear infrared laser heater; and image acquisition module 5 is an image acquisition camera with a built-in light.

[0035] The working principle or process of this embodiment is as follows:

[0036] In this embodiment, the colloidal gold test strip detector is used by first fixing the colloidal gold test strip to be tested onto the test strip delivery module 2. Then, the control module controls the test strip delivery module 2 to deliver the colloidal gold test strip to the designated detection position inside the housing 1. After the colloidal gold test strip is delivered to the designated detection position, the control module controls the reagent dispensing module 3 to add a quantitative amount of colloidal gold detection reagent to the colloidal gold test strip. After the detection reagent is added, a corresponding detection reaction occurs on the colloidal gold test strip, that is, a color reaction occurs while absorbing infrared wavelengths. After the colloidal gold test reagent is added to the colloidal gold test strip, the control module first controls the image acquisition module 5 to acquire the color development information on the colloidal gold test strip and transmits the acquired color development information back to the control module. Then, it controls the infrared laser heating module 4 to heat the detection area of ​​the colloidal gold test strip with infrared light and uses the thermal imaging module 6 to acquire the thermal signal of the detection area of ​​the colloidal gold test strip. The thermal imaging module 6 generates a high-precision thermal image based on the thermal information of the detection area of ​​the colloidal gold test strip, converts the signal into a digital image, and transmits it to the control module. The control module comprehensively judges the detection result of the colloidal gold test strip based on the color development information transmitted back by the image acquisition module 5 and the digital thermal image transmitted back by the thermal imaging module 6.

[0037] The beneficial effects of this embodiment are as follows:

[0038] The colloidal gold test strip detector of this embodiment can simultaneously perform colorimetric detection and infrared detection on colloidal gold test strips that can absorb infrared wavelengths and develop color, avoiding the need for two detection devices, shortening the detection cycle of such colloidal gold test strips, and also preventing the oxidation of colloidal gold particles during the detection process, thus improving the accuracy of the detection results.

[0039] Example 2

[0040] This embodiment is a second embodiment of a colloidal gold test strip detector. Based on the first embodiment, as shown in Figures 1-9, the structure of the reagent dispensing module 3 and the test strip delivery module 2 is further defined.

[0041] Specifically, the reagent dispensing module 3 includes a dispensing tube 301 and a first driving unit 302 fixedly installed in the inner cavity of the housing 1. The first driving unit 302 is connected to the control module. The inner cavity of the dispensing tube 301 is provided with a piston 303 that can slide along the axis of the dispensing tube 301. The side wall of the piston 303 is tightly fitted with the side wall of the inner cavity of the dispensing tube 301. The piston 303 is fixedly connected to the output end of the first driving unit 302. The side wall of the dispensing tube 301 is provided with an inlet 311 and an outlet 312. The inlet 311 is connected to an inlet pipe that extends to the outside of the housing 1. The inlet pipe is provided with a valve. The inner cavity of the housing 1 is movably connected with a blocking part 7 that can block the outlet 312. The blocking part 7 can switch between a closed state that blocks the outlet 312 and an open state that is offset from the outlet 312.

[0042] Specifically, the first drive unit 302 is a telescopic electric cylinder with adjustable stroke.

[0043] Specifically, the test strip delivery module 2 includes a chute 201, a slider 202, and a second drive unit 203. The chute 201 is located at the bottom of the inner cavity of the housing 1. The slider 202 is located in the chute 201 and is slidably connected to the chute 201. The slider 202 is provided with a slot 221 that can accommodate colloidal gold test strips. The slider 202 can slide on the chute 201 until the slot 221 abuts against the insertion hole 101. The second drive unit 203 is connected to the control module. The slider 202 is connected to the drive end of the second drive unit 203. When the slider 202 slides on the chute 201, it can push the blocking part 7 to be misaligned from the liquid outlet 312.

[0044] Specifically, the second drive unit 203 includes a rotary motor 231, a screw 232, and a connecting block 233. The screw 232 is installed at the bottom of the inner cavity of the slide groove 201 and is rotatably connected to the slide groove 201. The connecting block 233 is installed in the slide groove 201 and is threadedly connected to the screw 232. The top surface of the connecting block 233 is fixedly connected to the bottom surface of the slider 202. The rotary motor 231 is fixedly connected to the housing 1. The screw 232 is fixedly connected to the output end of the rotary motor 231. The control module is connected to the rotary motor 231.

[0045] Specifically, one end of the plug 7 is rotatably connected to the housing 1, and the other end is connected to an elastic member 8. In the vertical direction, the end of the plug 7 connected to the elastic member 8 is located above the slot 221. The elastic member 8 is a compression spring, and a silicone pad is provided at the end of the plug 7 that can block the liquid outlet 312.

[0046] Specifically, the slot 221 has a clip 9 at the end away from the socket 101 for holding colloidal gold test paper. The clip 9 is rotatably connected to the slot 221, and a torsion spring is provided between the clip 9 and the slot 221. The side wall of the housing 1 has an abutment protrusion 102 located above the socket 101. The abutment protrusion 102 can abut against the clip 9 and drive the clip 9 to rotate within the slot 221. The end face of the clip 9 near the socket 101 is an inclined plane. The end of this inclined plane near the slot 221 is inclined away from the socket 101. The abutment protrusion 102 has a first plane that can fit against this inclined plane.

[0047] Specifically, the slot 221 is also provided with a limiting block 222 that can abut against the colloidal gold test strip. The limiting block 222 is fixedly installed on the end of the slot 221 away from the insertion hole 101. The length of the limiting block 222 to the end face of the slot 221 is less than the length of the colloidal gold test strip, and part of the colloidal gold test strip is exposed on the outside of the housing 1 when inserted.

[0048] The working principle or process of this embodiment is as follows:

[0049] When colloidal gold test strip testing is required, the control module first controls the rotary motor 231 to work. The rotary motor 231 drives the screw 232 to rotate. After the screw 232 rotates, it drives the slider 202 to slide in the groove 201 towards the insertion hole 101 through the connecting block 233, until the slot 221 on the slider 202 is aligned with the insertion hole 101 on the housing 1. During the sliding of the slider 202 towards the insertion hole 101, the clip 9 gradually approaches the abutment protrusion 102 on the housing 1 until the clip 9 abuts against the abutment protrusion 102. When the clip 9 abuts against the abutment protrusion 102, that is, the inclined plane on the clip 9 abuts against the first plane on the abutment protrusion 102, as the slider 202 continues to slide, the abutment protrusion 102 lifts the clip 9 and squeezes the rotating torsion spring, causing the clip 9 to rotate in the slot 221, and the clip 9 separates from the bottom surface of the slot 221. After the slot 221 is aligned with the socket 101, the colloidal gold test strip is inserted into the inner cavity of the housing 1 through the socket 101. The colloidal gold test strip inserted into the inner cavity of the housing 1 is located in the slot 221 on the slider 202 until the colloidal gold test strip can no longer be inserted. At this time, the colloidal gold test strip abuts against the limiting block 222, reaching the insertion limit. After the colloidal gold test strip is inserted, the rotary motor 231 rotates in the opposite direction, driving the screw 232 to reverse. The reverse rotation of the screw 232 drives the slider 202 to slide away from the socket 101. When the slider 202 slides until the clamping piece 9 separates from the abutting protrusion 102, the torsion spring is rotated to drive the clamping piece 9 to return to its original position. The clamping piece 9 holds the colloidal gold test strip in the slot 221. Simultaneously, as the slider 202 slides away from the insertion hole 101, it comes into contact with the blocking part 7. As the slider 202 continues to slide, it causes the blocking part 7 to rotate and compress the elastic element 8. After the blocking part 7 rotates, it is in an open state, exposing the outlet 312. The colloidal gold test strip continues to slide until it reaches the designated detection position, at which point the colloidal gold test strip is used for detection.

[0050] When the colloidal gold test strip is used for testing, the valve on the inlet tube is closed. The control module controls the first drive unit 302 to work. The output end of the first drive unit 302 squeezes the piston 303, which pushes the piston 303 to squeeze the reagent in the dispensing tube 301. The reagent is squeezed out along the outlet 312 and drips onto the detection area of ​​the colloidal gold test strip. The colloidal gold test strip shows a detection reaction. Then, the color information of the colloidal gold test strip is acquired by the image acquisition module 5. After the colloidal gold test strip is heated by the infrared laser heating module 4, the thermal imaging module 6 generates a high-definition thermal image of the colloidal gold test strip, thus completing the acquisition of the test result.

[0051] After the test results are obtained, the rotary motor 231 reverses and drives the slider 202 to slide in the opposite direction. During the reverse sliding process, the slider 202 can stop pushing the blocking part 7. Under the drive of the elastic element 8, the blocking part 7 resets and re-blocks the liquid outlet 312. The slider 202 continues to slide until it abuts the protrusion 102 and lifts the clip 9. At this time, part of the colloidal gold test strip has already extended out of the insertion hole 101. The operator can pull the colloidal gold test strip out of the slot 211 through the part that extends out of the insertion hole 101.

[0052] The beneficial effects of this embodiment are as follows:

[0053] During reagent dispensing, the control module can control the forward distance of the piston 303 pushed by the first drive unit 302 to control the quantitative addition of the test reagent, achieving precise control of the dosage. The telescopic electric cylinder is small in size and has high adjustment accuracy. The blocking part 7 prevents the test reagent at the outlet 312 from being oxidized. The clip 9 prevents the colloidal gold test strip from falling out of the slot 221. The limiting block 222 facilitates the operator to pull out the colloidal gold test strip after it has been inserted through the insertion hole 101.

[0054] Example 3

[0055] This embodiment is a third embodiment of a colloidal gold test strip detector. Based on embodiment two, this embodiment further defines other structures of the detector.

[0056] Specifically, as shown in Figure 6, the liquid outlet 312 is conical.

[0057] Specifically, as shown in Figure 3, the housing 1 is provided with an observation window, which is a transparent window, and a light-shielding cover 10 is provided on the observation window, which is rotatably connected to the housing 1.

[0058] The beneficial effects of this embodiment are as follows:

[0059] The outlet 312 is conical in shape, allowing the droplets flowing from it to drip slowly, while also reducing the contact area between the reagent and air at the outlet 312. The observation window allows operators to observe the interior of the housing 1 through the transparent window, determining whether the various components inside the housing 1 are functioning properly. The light-shielding cover 10 blocks light from entering the housing 1, preventing the reagent from decomposing upon exposure to light.

[0060] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0061] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A colloidal gold test strip detector, characterized in that, The device includes a housing (1), a control module, a test strip delivery module (2) for delivering the test strip to the detection position, a reagent dispensing module (3) for dispensing reagents onto the test strip, an infrared laser heating module (4) for heating the detection area of ​​the test strip, an image acquisition module (5) for acquiring color information of the test strip, and a thermal imaging module (6) for acquiring thermal signals of the detection area of ​​the test strip. The test strip delivery module (2), the reagent dispensing module (3), the image acquisition module (5), the infrared laser heating module (4), the thermal imaging module (6), and the control module are all installed inside the housing (1). The test strip delivery module (2), the reagent dispensing module (3), the infrared laser heating module (4), the image acquisition module (5), and the thermal imaging module (6) are all connected to the control module. The housing (1) is also provided with an insertion hole (101) for the test strip to be inserted.

2. The colloidal gold test strip detector according to claim 1, characterized in that, The reagent dispensing module (3) includes a dispensing tube (301) and a first driving unit (302) fixedly installed in the inner cavity of the housing (1). The first driving unit (302) is connected to the control module. The inner cavity of the dispensing tube (301) is provided with a piston (303) that can slide along the axis of the dispensing tube (301). The side wall of the piston (303) is tightly fitted with the side wall of the inner cavity of the dispensing tube (301). The piston (303) and the first driving unit (302) are in close contact. The output end is fixedly connected. The side wall of the filling tube (301) is provided with an inlet (311) and an outlet (312). The inlet (311) is connected to an inlet pipe that extends to the outside of the housing (1). The inlet pipe is provided with a valve. The inner cavity of the housing (1) is movably connected to a blocking part (7) that can block the outlet (312). The blocking part (7) can switch between a closed state that blocks the outlet (312) and an open state that is offset from the outlet (312).

3. The colloidal gold test strip detector according to claim 2, characterized in that, The first drive unit (302) is a telescopic electric cylinder with adjustable stroke.

4. The colloidal gold test strip detector according to claim 2, characterized in that, The test strip delivery module (2) includes a chute (201), a slider (202), and a second drive unit (203). The chute (201) is located at the bottom of the inner cavity of the housing (1). The slider (202) is located in the chute (201) and is slidably connected to the chute (201). The slider (202) is provided with a slot (221) for accommodating colloidal gold test strips. The slider (202) can slide on the chute (201) until the slot (221) abuts against the insertion hole (101). The second drive unit (203) is connected to the control module. The slider (202) is connected to the drive end of the second drive unit (203). When the slider (202) slides on the chute (201), it can push the blocking part (7) to be misaligned from the liquid outlet (312).

5. The colloidal gold test strip detector according to claim 4, characterized in that, The second drive unit (203) includes a rotary motor (231), a screw (232), and a connecting block (233). The screw (232) is installed at the bottom of the inner cavity of the slide (201) and is rotatably connected to the slide (201). The connecting block (233) is installed in the slide (201) and is threadedly connected to the screw (232). The top surface of the connecting block (233) is fixedly connected to the bottom surface of the slider (202). The rotary motor (231) is fixedly connected to the housing (1). The screw (232) is fixedly connected to the output end of the rotary motor (231). The control module is connected to the rotary motor (231).

6. The colloidal gold test strip detector according to claim 4, characterized in that, One end of the blocking part (7) is rotatably connected to the housing (1), and the other end is connected to an elastic element (8). In the vertical direction, the end of the blocking part (7) connected to the elastic element (8) is located above the groove (201).

7. The colloidal gold test strip detector according to claim 4, characterized in that, The slot (221) is provided with a clip (9) at one end away from the insertion hole (101) for holding colloidal gold test paper. The clip (9) is rotatably connected to the slot (221). A rotating torsion spring is also provided between the clip (9) and the slot (221). The side wall of the housing (1) is provided with an abutment protrusion (102). The abutment protrusion (102) can abut against the clip (9) and drive the clip (9) to slide on the slot (221).

8. The colloidal gold test strip detector according to claim 7, characterized in that, The slot (221) is provided with a limiting block (222) that can abut against the colloidal gold test paper. The limiting block (222) is fixedly installed on the slot (221) at one end away from the insertion hole (101).

9. The colloidal gold test strip detector according to claim 2, characterized in that, The liquid outlet (312) is conical.

10. A colloidal gold test strip detector according to claim 2, characterized in that, The housing (1) is provided with an observation window, which is a transparent window. The observation window is provided with a light-shielding cover (10), which is rotatably connected to the housing (1).

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