A high-pressure injector for improving the sensing accuracy of an injection process

Abstract

The application discloses a high-pressure injector for improving injection process sensing precision, relates to medical devices, and aims at the problem of edge effect of reflected light of a reflecting sheet in the prior art. The reflecting sheet is characterized in that the edge thereof is outwardly convex towards an infrared emission detection array. The advantage of the application is that the infrared light reflected at the edge will have an obvious mutation effect after the reflecting surfaces at both ends of the reflecting sheet are made outwardly convex, thereby reducing the edge effect in the original reflected light. The light intensity curve obtained by the infrared emission detection array will have an obvious mutation at the edge of the interval, and the electric control program of the machine head can easily and accurately intercept the required position interval for midpoint value taking.

Description

Technical Field

[0001] This invention relates to medical devices, and more particularly to a high-pressure injector that improves the accuracy of injection process sensing. Background Technology

[0002] like Figure 1 As shown, the high-pressure injector mainly includes a head 10, a syringe 20, and an injection tubing 30 connected in sequence. The head 10 houses an electrical control assembly and a power assembly for controlling and outputting the injection power. The syringe 20 stores the injected liquid, such as contrast agent or saline solution. The injection tubing 30 forms a soft, buffered connection between the human end and the syringe 20, while simultaneously feeding back the current injection pressure to the head 10.

[0003] In addition to receiving real-time pressure feedback from the injection tubing 30, the syringe head 10 also needs to read the real-time advancement position of the advancement mechanism 13 via the vernier 15. The advancement mechanism 13 is powered by a servo motor 11, which transmits injection power through a belt drive mechanism 12, causing the push rod within the advancement mechanism 13 to advance gradually. The push rod is fixedly connected to a vernier base 14 located on the outside of the advancement mechanism 13. A vernier 15 is mounted on the outside of the vernier base 14, and a reflector 16 is provided at one extended end of the vernier 15. Figure 2 and Figure 3 As shown. The reflector 16 is a plane mirror structure, as... Figure 4 As shown. Inside the head unit 10, on the side of the propulsion mechanism 13 away from the servo motor 11, the head unit 10 housing also has an infrared emission detection array 17 extending in the same direction as the propulsion mechanism 13. The infrared light emitted by the infrared emission detection array 17 is reflected by the reflector 16 on the vernier 15, and a light intensity curve whose amplitude changes with the position of the vernier base 14 can be detected on the infrared emission detection array 17. Figure 5 As shown, the light intensity curve is formed by continuously splicing the bar chart signals obtained from each adjacent infrared detection probe.

[0004] The head unit 10 detects light intensities exceeding a certain threshold in the light intensity curve, thus obtaining the effective light intensity range T1. The midpoint of this range is then taken as the position reading, which is the current position information fed back by the vernier 15. However, the reflector 16 is a plane mirror structure, and the reflection effect at its edges is not significant. This often leads to misjudgments of the light intensity range T2 due to poor edge reflection, resulting in an error of approximately 3mm in the position information. That is, the infrared detection probe, which is not directly illuminating the reflector 16, also receives some reflected infrared light, causing misjudgments due to edge effects. Although there is currently no evidence that this position information error directly causes medical accidents, its accuracy clearly needs improvement to meet increasingly demanding technical requirements. Summary of the Invention

[0005] The purpose of this invention is to provide a high-pressure injector that improves the sensing accuracy of the injection process, so as to solve the problems existing in the prior art.

[0006] The high-pressure injector for improving the sensing accuracy of the injection process described in this invention includes a head, a syringe, and an injection tubing connected in sequence; wherein the head is provided with an electronic control component and a power component for controlling and outputting the power for injection; the syringe is used to store the liquid to be injected; and the injection tubing is used to form a soft connection for buffering between the human end and the syringe, while simultaneously feeding back the current injection pressure to the head.

[0007] The machine head reads the advancement position of the advancement mechanism in real time through a vernier; the power source of the advancement mechanism is a servo motor, which transmits the injection power through a toothed belt transmission mechanism, causing the push rod in the advancement mechanism to advance step by step; the push rod is fixedly connected to a vernier base set on the outside of the advancement mechanism, a vernier is installed on the outside of the vernier base, and a reflector is provided at one extension end of the vernier;

[0008] The head housing is also provided with an infrared emission detection array that extends in the same direction as the propulsion mechanism; the infrared rays emitted by the infrared emission detection array are reflected by the reflector on the vernier to detect a light intensity curve whose amplitude moves with the position of the vernier base, thereby determining the real-time position of the push rod.

[0009] The edge of the reflector bulges outward toward the infrared emission detection array.

[0010] The cross-section of the reflector along the moving direction near the edge of the infrared emission detection array is semi-elliptical, and the ellipse is concave in the middle and convex at both ends.

[0011] The reflector has a raised edge at each of its left and right ends, pointing towards the infrared emission detection array.

[0012] The high-pressure injector described in this invention, which improves the sensing accuracy of the injection process, has the advantage that by making the reflective surfaces at both ends of the reflective sheet convex, a significant abrupt change occurs in the reflected infrared light at the edges, thereby reducing the edge effect in the original reflection. The light intensity curve obtained by the infrared emission detection array will show a significant abrupt change at the edge of the interval, allowing the electronic control program of the injector head to easily and accurately extract the required position interval for midpoint value selection. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a high-pressure injector in the prior art.

[0014] Figure 2 This is a schematic diagram of the internal structure of the nose cone in existing technology.

[0015] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0016] Figure 4 This is a schematic diagram of the structure of a vernier in the prior art.

[0017] Figure 5 This is a schematic diagram illustrating the principle of process sensing and positioning in existing technologies.

[0018] Figure 6 This is a schematic diagram of the structure of the first embodiment of the vernier described in this invention.

[0019] Figure 7 This is a schematic diagram of the structure of the second embodiment of the vernier described in this invention.

[0020] Figure 8 This is a schematic diagram of the light intensity curve of the high-pressure injector described in this invention.

[0021] Figure label:

[0022] 10-Head unit, 11-Serving motor, 12-Gear belt drive mechanism, 13-Propulsion mechanism, 14-Vernier base, 15-Vernier, 16-Reflector, 17-Infrared emission detection array;

[0023] 20-Injection cartridge;

[0024] 30 - Injection tubing. Detailed Implementation

[0025] Example 1

[0026] like Figure 6 As shown, the high-pressure injector for improving the sensing accuracy of the injection process described in this invention includes a head 10, a syringe 20, and an injection tubing 30 connected in sequence; wherein the head 10 is provided with an electronic control component and a power component for controlling and outputting the power for injection; the syringe 20 is used to store the liquid to be injected; the injection tubing 30 is used to form a soft connection for buffering between the human end and the syringe 20, and at the same time, it feeds back the current injection pressure to the head 10;

[0027] The head 10 reads the pushing position of the pushing mechanism 13 in real time through the vernier 15; the power source of the pushing mechanism 13 is the servo motor 11, which transmits the injection power through the toothed belt transmission mechanism 12, causing the push rod in the pushing mechanism 13 to advance step by step; the push rod is fixedly connected to a vernier base 14 set on the outside of the pushing mechanism 13, and a vernier 15 is installed on the outside of the vernier base 14, with a reflector 16 provided at one extended end of the vernier 15;

[0028] The housing of the head 10 is also provided with an infrared emission detection array 17 that extends in the same direction as the propulsion mechanism 13; the infrared rays emitted by the infrared emission detection array 17 are reflected by the reflector 16 on the vernier 15 to detect a light intensity curve whose amplitude moves with the position of the vernier base 14, thereby determining the real-time position of the push rod.

[0029] The edge of the reflector 16 protrudes outward toward the infrared emission detection array 17.

[0030] The cross-section of the reflector 16 along the moving direction near the edge of the infrared emission detection array 17 is semi-elliptical, and the ellipse is concave in the middle and convex at both ends.

[0031] By making the reflective surfaces at both ends of the reflector 16 convex, a significant abrupt change in the reflected infrared light occurs at the edges, thus reducing the edge effect in the original reflection. The light intensity curve obtained by the infrared emission detection array 17 will show a significant abrupt change at the edge of the interval, allowing the electronic control program of the head unit 10 to easily and accurately extract the required position interval for midpoint value selection. The effect is illustrated below. Figure 8 As shown.

[0032] Example 2

[0033] like Figure 7 As shown, the reflector 16 has a raised edge at each of its left and right ends, pointing towards the infrared emission detection array 17. The purpose is to provide another feasible structural solution.

[0034] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this invention.

Claims

1. A high-pressure injector for improving the accuracy of injection process sensing, comprising a head (10), a syringe (20), and an injection tubing (30) connected in sequence; wherein the head (10) is provided with an electronic control component and a power component for controlling and outputting power for injection; the syringe (20) is used to store the liquid to be injected; the injection tubing (30) is used to form a soft connection for buffering between the human end and the syringe (20), and at the same time, to feed back the current injection pressure to the head (10); The head (10) reads the pushing position of the pushing mechanism (13) in real time through the vernier (15); the power source of the pushing mechanism (13) is a servo motor (11), which transmits the injection power through the toothed belt transmission mechanism (12) to push the push rod in the pushing mechanism (13) step by step; the push rod is fixedly connected to a vernier base (14) set on the outside of the pushing mechanism (13), and a vernier (15) is installed on the outside of the vernier base (14), and a reflector (16) is provided on one extended end of the vernier (15); The housing of the head (10) is also provided with an infrared emission detection array (17) extending in the same direction as the propulsion mechanism (13); the infrared rays emitted by the infrared emission detection array (17) are reflected by the reflector (16) on the vernier (15) to detect a light intensity curve whose amplitude moves with the position of the vernier base (14), thereby determining the real-time position of the push rod. Its features are, The edge of the reflector (16) protrudes outward toward the infrared emission detection array (17).

2. The high pressure syringe of claim 1, wherein, The cross-section of the reflector (16) along the moving direction near the edge of the infrared emission detection array (17) is semi-elliptical, and the ellipse is concave in the middle and convex at both ends.

3. The high-pressure injector for improving the sensing accuracy of the injection process according to claim 1, characterized in that, The reflector (16) has a raised edge at each of its left and right ends, which is directed toward the infrared emission detection array (17).

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