Motion stop distance testing device for medical instrument
By designing displacement sensing, conversion and error measurement devices for medical devices, the difficulty of measuring emergency stop distances of moving parts of medical devices is solved, and a high-precision and simple measurement method is realized, which is suitable for a variety of medical device types.
Patent Information
- Application Number
- CN202510757422.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-06
- Publication Date
- 2025-09-05
AI Technical Summary
In the prior art, it is difficult to measure the emergency stop distance of moving parts of medical devices, and there are problems such as the influence of personal reaction time, the measurement distance is short and the displacement trajectory is difficult to mark, and there is a lack of a unified measurement device.
A test system including displacement sensing, conversion and error measurement devices is designed to sense the position of moving parts through photoelectric sensing or laser displacement sensors, convert it into a command signal to control emergency stops, and measure system errors to improve measurement accuracy.
It realizes the emergency stop distance measurement of moving parts of different types of medical devices, with simple structure, easy operation, short response time, high measurement accuracy, and meets the requirements of relevant standards.
Smart Images
Figure CN120593630A_ABST
Abstract
Description
Technical Field
[0001] The invention is a tool for placing an electrode fixing device on a skull of an implantable medical system, belonging to the technical field of implantable medical systems. Background Art
[0002] Measuring the emergency stop distance for linear motion of medical device moving parts, as currently specified in standards such as GB9706.201, GB9706.244, 9706.264, and YY9706.268, is difficult. The reasons for this are: 1. The influence of individual reaction time variations; 2. The short measurement distance makes it difficult to mark the displacement trajectory; and 3. The shape and control of medical device moving parts vary, requiring a unified measurement device.
[0003] A prior art test system for measuring the overshoot distance of linear motion in patient support devices exists. This system only measures the emergency stop distance of moving parts in specific medical device models. Its inherent reaction time affects measurement results, and distance measurement requires complex length tools. Summary of the Invention
[0004] The object of the present invention is to provide a motion stopping distance testing device and method for medical devices, which simplifies the measurement operation and improves the measurement accuracy.
[0005] The technical solutions of the present invention are as follows.
[0006] A first aspect of the present invention provides a motion stopping distance testing device for a medical device, comprising:
[0007] a displacement sensing device, configured to measure the distance between the device and the medical device, generate a trigger signal upon sensing movement of a moving part of the medical device from a first position to a second position, and measure the distance between the second position and the third position after the moving part stops moving at the third position;
[0008] a conversion device, configured to convert the trigger signal into a command signal and send the command signal to the emergency stop device of the medical device, thereby stopping the movement of the medical device;
[0009] The error measuring device is used to measure the time delay between the generation of the trigger signal and the sending of the instruction signal, so as to determine the system error of the motion stopping distance testing device.
[0010] Preferably, the first position, the second position, and the third position are located on the same straight line; and the moving component performs linear motion along the straight line.
[0011] Preferably, the displacement sensing device comprises:
[0012] a length marking component, the length marking component being provided on a moving component of the medical device, and the length marking direction of the length marking component being parallel to the direction of the straight line; and
[0013] A photoelectric sensing component, comprising a transmitting part and a receiving part; the transmitting part and the receiving part are arranged so that an optical axis therebetween is perpendicular to the straight line, and when the front end of the length marking component contacts the optical axis, the moving part of the medical device reaches the second position, and at the same time, the photoelectric sensing component generates the trigger signal.
[0014] Preferably, after the moving part of the medical device stops at the third position, the length mark on the length marking part can be used to measure the distance between the second position and the third position, thereby obtaining the movement stopping distance of the medical device based on the distance and the system error.
[0015] Preferably, the displacement sensing device comprises:
[0016] a laser displacement sensor capable of emitting a laser beam directed toward a moving part of the medical device, thereby measuring the distance and displacement of the moving part of the medical device in the direction of the laser beam; the direction of the laser beam being parallel to the direction of the straight line; and
[0017] A laser displacement sensor amplifier capable of acquiring the distance and displacement measured by the laser displacement sensor, thereby determining the position of the moving part of the medical device; when the moving part of the medical device moves from the first position to the second position, the laser displacement sensor amplifier can generate the trigger signal.
[0018] Preferably, after the moving part of the medical device stops at the third position, the laser displacement sensor amplifier can measure the distance between the second position and the third position, thereby obtaining the movement stopping distance of the medical device based on the distance and the system error.
[0019] Preferably, the conversion device includes an optocoupler isolation relay, the input end of the optocoupler isolation relay can receive the trigger signal, and the output end of the optocoupler isolation relay can send the command signal to the emergency stop device of the medical device through an external cable.
[0020] Preferably, the error measuring device includes an oscilloscope, which is capable of acquiring the trigger signal and the command signal.
[0021] A second aspect of the present invention provides a method for using the motion stopping distance testing device for medical devices according to any one of the first aspects of the present invention, comprising the following steps:
[0022] Adjusting the relative positioning of the displacement sensing device and the medical device so that the displacement sensing device can sense the position of the moving part of the medical device;
[0023] Connecting the conversion device to the emergency stop switch of the medical device;
[0024] activating a moving component of the medical device to move the moving component of the medical device from a first position to a second position;
[0025] activating the displacement sensing device to sense the position of the moving part of the medical device; when the moving part of the medical device moves from a first position to a second position, the displacement sensing device generates a trigger signal;
[0026] The conversion device converts the trigger signal into a command signal and sends it to the emergency stop device of the medical device, so that the moving parts of the patient carrier stop moving; at the same time, the error measurement device measures the time delay between the generation of the trigger signal and the sending of the command signal, thereby determining the system error of the motion stop distance testing device;
[0027] The displacement sensing device measures the distance between the second position and the third position, and calculates the movement stopping distance of the medical device according to the system error.
[0028] Preferably, the moving direction of the moving component is front-to-back, up-down or left-to-right.
[0029] The device and method according to the above technical solution can measure the emergency stopping distance of moving parts of different types of medical devices. The linear motion of the moving parts includes six directions: front-to-back, up-down, and left-to-right, and complies with the testing requirements of standards such as GB9706.201, GB9706.244, 9706.264, and YY9706.268. The device according to the present invention has the advantages of simple structure, easy operation, safety and reliability, inherently short response time, accurate measurement, and sufficient measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 It is a schematic structural diagram of a medical device and a motion stop distance measuring device of the present invention;
[0031] Figure 2 It is a structural diagram of an embodiment of the present invention;
[0032] Figure 3 yes Figure 2 Schematic diagram of the use state of the embodiment in FIG;
[0033] Figure 4 is a structural diagram of another embodiment of the present invention;
[0034] Figure 5 yes Figure 4 Schematic diagram of the usage status of the embodiment in FIG.
[0035] The meanings of the reference numerals in the figures are as follows:
[0036] 10. Medical device; 11. Moving parts; 12. Emergency stop device; 20. Motion stop distance testing device; 21. Displacement sensing device; 22. Conversion device; 23. Error measuring device. DETAILED DESCRIPTION
[0037] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.
[0038] like Figure 1 As shown, the present invention provides a motion stopping distance testing device 20 for a medical device 10. The motion stopping distance testing device 20 includes:
[0039] The displacement sensing device 21 is used to measure the distance between it and the medical device 10, and to generate a trigger signal when sensing that the moving part 11 of the medical device moves from a first position to a second position, and to measure the distance between the second position and the third position after the movement of the moving part 11 stops at the third position.
[0040] The conversion device 22 is used to convert the trigger signal into a command signal and send it to the emergency stop device 12 of the medical device 10, so that the moving part 11 of the medical device 10 stops moving.
[0041] The error measuring device 23 is used to measure the time delay between the generation of the trigger signal and the sending of the command signal, so as to determine the system error of the motion stopping distance testing device 20.
[0042] In a preferred embodiment, the first position, the second position, and the third position are located on the same straight line; the moving component 11 performs linear motion along the straight line.
[0043] Example 1
[0044] The motion stopping distance test device of this embodiment is mainly composed of a standard steel ruler, a U-shaped photoelectric sensor, an optical coupling isolation relay, a Type-C interface power module, a switch and an external cable. The structure is as follows: Figure 2 shown.
[0045] Connect the external cable to the port on the emergency stop device of the medical device's moving part and secure a standard steel ruler to the moving part. During linear motion, the standard steel ruler moves forward into the slot of the U-shaped photoelectric sensor. The U-shaped photoelectric sensor senses the ruler's contact with the optical axis and generates a voltage signal as a trigger. This trigger signal is transmitted to the optocoupler isolation relay, which immediately disconnects the circuit of the emergency stop device through the external cable, causing the moving part to stop. The length of the ruler extending into the U-shaped slot is the distance measured for the moving part's emergency stop.
[0046] The device 1 can be powered by a power bank or charger with a Type-C interface connected to a power module. The switch is connected to an external cable to ensure the safety of the circuit of the emergency stop device.
[0047] The method 1 uses a level, a tripod, and a testing device 1.
[0048] First, fix the standard steel ruler on the moving part of the medical device, with the scale perpendicular to the linear motion direction of the moving part of the medical device. At the same time, connect the optical coupler isolation relay of the test device 1 to the emergency stop switch of the moving part of the medical device and fix it on the tripod. Use the level to calibrate the position of the standard steel ruler and the U-type photoelectric sensor of the test device 1, so that they are on the same horizontal line. The layout diagram is as follows: Figure 2 shown.
[0049] The medical device's moving part moves forward, and the moment the standard steel ruler contacts the U-shaped photoelectric sensor, the emergency stop switch is disconnected. The length of the standard steel ruler's contact with the U-shaped photoelectric sensor is equal to the emergency stop distance of the medical device's moving part's linear motion.
[0050] The device 1 can measure the time delay of the voltage signal of the U-shaped photoelectric sensor and the optocoupler isolation relay through an oscilloscope, calculate the system error of the device, and ensure that the measurement result is more accurate.
[0051] The device 2 is mainly composed of a laser displacement sensor, a laser displacement sensor amplifier, an optocoupler isolation relay, a Type-C interface power module, a switch and an external cable. The structure is as follows Figure 3 shown.
[0052] Connect the external cable to the interface of the emergency stop device of the moving part of the medical device, and directly point the laser displacement sensor at the moving part of the medical device. When the moving part moves in a straight line, the laser displacement sensor measures the distance and displacement of the moving part, and the laser displacement sensor amplifier displays the value. The laser displacement sensor amplifier can set the displacement trigger signal to generate a voltage signal. The triggered signal is transmitted to the optocoupler isolation relay, and the optocoupler isolation relay immediately disconnects the circuit of the emergency stop device through the external cable. The moving part of the medical device stops, and the laser displacement sensor can measure the emergency stop distance of the moving part.
[0053] The device 2 can be powered by a power bank or charger with a Type-C interface connected to the power module. The switch is connected to an external cable to ensure the safety of the circuit of the emergency stop device.
[0054] This method 2 uses a level, a tripod, and a testing device 2.
[0055] First, connect the optocoupler isolation relay of test device 2 to the emergency stop switch of the moving part of the medical device, and fix the laser displacement sensor of test device 2 on the tripod, and then place it in the linear motion direction of the moving part of the medical device. Use the level to calibrate the position of the moving part of the medical device and the laser displacement sensor, and keep them on the same horizontal line. Figure 3 shown.
[0056] The laser displacement sensor amplifier sets the displacement of the medical device's moving part. When the moving part moves forward to the set displacement, the emergency stop switch is disconnected. The laser displacement sensor can measure the distance the moving part stops in an emergency.
[0057] The device 2 can measure the time delay of the voltage signal of the laser displacement sensor amplifier and the optical coupling isolation relay through an oscilloscope, calculate the system error of the device, and ensure that the measurement result is more accurate.
Claims
1. A motion stopping distance testing device for medical devices, characterized in that: include: a displacement sensing device, configured to measure the distance between the device and the medical device, generate a trigger signal upon sensing movement of a moving part of the medical device from a first position to a second position, and measure the distance between the second position and the third position after the moving part stops moving at the third position; a conversion device for converting the trigger signal into a command signal and sending the command signal to the emergency stop device of the medical device, thereby stopping the moving parts of the medical device; The error measuring device is used to measure the time delay between the generation of the trigger signal and the sending of the instruction signal, so as to determine the system error of the motion stopping distance testing device.
2. The motion stopping distance testing device for medical devices according to claim 1, characterized in that: The first position, the second position, and the third position are located on the same straight line; the moving component performs linear motion along the straight line.
3. The motion stopping distance testing device for medical devices according to claim 2, characterized in that: The displacement sensing device comprises: a length marking component, the length marking component being provided on a moving component of the medical device, and the length marking direction of the length marking component being parallel to the direction of the straight line; and A photoelectric sensing component, comprising a transmitting part and a receiving part; the transmitting part and the receiving part are arranged so that an optical axis therebetween is perpendicular to the straight line, and when the front end of the length marking component contacts the optical axis, the moving part of the medical device reaches the second position, and at the same time, the photoelectric sensing component generates the trigger signal.
4. The motion stopping distance testing device for medical devices according to claim 3, characterized in that: After the moving part of the medical device stops at the third position, the length mark on the length marking part can be used to measure the distance between the second position and the third position, thereby obtaining the movement stopping distance of the medical device based on the distance and the system error.
5. The motion stopping distance testing device for medical devices according to claim 2, characterized in that: The displacement sensing device comprises: a laser displacement sensor capable of emitting a laser beam directed toward a moving part of the medical device, thereby measuring the distance and displacement of the moving part of the medical device in the direction of the laser beam; the direction of the laser beam being parallel to the direction of the straight line; and A laser displacement sensor amplifier capable of acquiring the distance and displacement measured by the laser displacement sensor, thereby determining the position of the moving part of the medical device; when the moving part of the medical device moves from the first position to the second position, the laser displacement sensor amplifier can generate the trigger signal.
6. The motion stopping distance testing device for medical devices according to claim 5, characterized in that: After the moving part of the medical device stops at the third position, the laser displacement sensor amplifier can measure the distance between the second position and the third position, thereby obtaining the movement stopping distance of the medical device based on the distance and the system error.
7. A motion stopping distance testing device for medical devices according to any one of claims 1 to 6, characterized in that: The conversion device includes an optocoupler isolation relay, the input end of the optocoupler isolation relay can receive the trigger signal, and the output end of the optocoupler isolation relay can send the command signal to the emergency stop device of the medical device through an external cable.
8. A motion stopping distance testing device for medical devices according to any one of claims 1 to 6, characterized in that: The error measuring device includes an oscilloscope, which can collect the trigger signal and the command signal.
9. A method for using the motion stopping distance testing device for medical devices according to any one of claims 1 to 8, comprising the following steps: Adjusting the relative positioning of the displacement sensing device and the medical device so that the displacement sensing device can sense the position of the moving part of the medical device; Connecting the conversion device to the emergency stop switch of the medical device; activating a moving component of the medical device to move the moving component of the medical device from a first position to a second position; activating the displacement sensing device to sense the position of the moving part of the medical device; when the moving part of the medical device moves from a first position to a second position, the displacement sensing device generates a trigger signal; The conversion device converts the trigger signal into a command signal and sends it to the emergency stop device of the medical device, so that the moving parts of the patient carrier stop moving; at the same time, the error measurement device measures the time delay between the generation of the trigger signal and the sending of the command signal, thereby determining the system error of the motion stop distance testing device; The displacement sensing device measures the distance between the second position and the third position, and calculates the movement stopping distance of the medical device according to the system error.
10. The method according to claim 9, characterized in that The moving direction of the moving component is front-back, up-down or left-right.