Device and method for measuring inertial parameters of emergency stop of CT equipment

Abstract

The present invention discloses a device and method for measuring inertial parameters of emergency stop of CT equipment, comprising: a drawstring encoder, a magnetic seat, a bipolar normally closed emergency switch and a measuring and processing device; wherein the drawstring encoder is arranged on the frame of the patient support of the CT equipment through the magnetic seat, and the drawstring end of the drawstring encoder is fixedly connected to the bed board of the patient support; one pole of the bipolar normally closed emergency switch is connected to the control line of the emergency stop switch of the CT equipment, and the other pole is connected to the start switch of the measuring and processing device, and the measuring and processing device can be synchronously controlled to start after the emergency stop switch of the CT equipment is activated; the measuring and processing device is electrically connected to the pulse signal output end of the drawstring encoder, and the number of pulse signals of the incremental drawstring encoder can be measured after starting, and the moving distance of the bed board of the patient support can be obtained according to the number of pulse signals. The measuring device has a simple structure and accurate measurement, and can provide accurate data for detecting CT equipment.

Description

Technical Field

[0001] The present invention relates to the field of medical CT equipment, and in particular to an inertial parameter measurement device and method for emergency stop of CT equipment. Background Art

[0002] As a medical device, CT equipment must comply with the provisions of Part 2-44 of GB9706.244-2020 Medical Electrical Equipment to ensure its safety: that is, the national standard for special requirements for basic safety and essential performance of X-ray computed tomography equipment. GB9706.244, 201.9.2.4.101.3, stipulates that the movement of the patient support (such as up, down, lateral movement, etc.) should stop within 10mm after the emergency stop is activated.

[0003] However, since the distance that the bed board of the patient support moves due to inertia is relatively small and is located inside the CT equipment, it must be measured when the emergency stop switch of the CT equipment is activated, which is not easy to measure. Currently, there is no device to measure the distance that the bed board of the patient support moves due to inertia after the emergency stop of the CT equipment is activated, and it is impossible to provide accurate data for detecting whether the CT equipment meets the requirements of existing regulations.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide an inertial parameter measurement device and method for emergency stop of CT equipment, which can accurately measure the distance that the bed board of the patient support moves due to inertia after the emergency stop of the CT equipment is activated, thereby solving the above-mentioned technical problems existing in the prior art.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] An embodiment of the present invention provides an inertial parameter measurement device for emergency stop of a CT device, comprising:

[0008] A pull-wire encoder, a magnetic base, a bipolar normally closed emergency switch and a measurement and processing device; among which,

[0009] The drawstring encoder is arranged on the frame of the patient support of the CT device through the magnetic seat, and the drawstring end of the drawstring encoder is fixedly connected to the bed board of the patient support;

[0010] One pole of the bipolar normally closed emergency switch is connected to the control line of the emergency stop switch of the CT device, and the other pole is connected to the start switch of the measurement and processing device, so that the measurement and processing device can be synchronously controlled to start after the emergency stop switch of the CT device is activated;

[0011] The measuring and processing device is electrically connected to the pulse signal output terminal of the draw wire encoder, and can measure the number of pulse signals of the incremental draw wire encoder after startup, and obtain the moving distance of the patient support bed plate according to the number of pulse signals.

[0012] The embodiment of the present invention further provides a method for measuring inertial parameters of a CT device when it is in emergency stop, using the device for measuring inertial parameters of a CT device when it is in emergency stop according to the present invention, comprising:

[0013] The drawstring encoder is arranged on the frame of the patient support of the CT device through a magnetic seat, and the drawstring end of the drawstring encoder is fixed on the bed board of the patient support;

[0014] Connect one pole of the bipolar normally closed emergency switch to the control line of the emergency stop switch of the CT equipment, and the other pole to the start switch of the measurement and processing device;

[0015] Electrically connect the measurement processing device to the pulse signal output terminal of the draw wire encoder;

[0016] During measurement, when the emergency stop switch of the CT equipment is activated, the bipolar normally closed emergency switch synchronously starts the measurement processing device, and the measurement processing device measures the number of pulse signals of the incremental rope encoder and obtains the moving distance of the patient support bed board based on the number of pulse signals.

[0017] Compared with the prior art, the device and method for measuring inertial parameters of CT equipment emergency stop provided by the present invention have at least the following beneficial effects:

[0018] By setting a drawstring encoder installed on the patient support of the CT device, in conjunction with a measurement processing device controlled by a bipolar normally closed emergency switch and an emergency stop switch of the CT device, the measurement processing device can be synchronously started to measure the number of pulse signals of the incremental drawstring encoder after the emergency stop switch of the CT device is activated, and then the moving distance of the bed board of the patient support is obtained according to the number of pulse signals. The measuring device can quickly and accurately measure the inertial moving distance of the bed board of the patient support of the CT device in a relatively simple way, and provide accurate data for detecting the CT device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of an inertial parameter measurement device for emergency stop of a CT device is provided for an embodiment of the present invention;

[0021] Figure 2 A circuit connection diagram of an inertial parameter measurement device for emergency stop of CT equipment is provided for an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, which does not constitute a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0023] First, the terms that may be used in this article are explained as follows:

[0024] The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y means both “X” or “Y” and “X and Y”.

[0025] The terms "include", "comprises", "contains", "has" or other descriptions with similar semantics should be interpreted as non-exclusive inclusion. For example, including certain technical feature elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.) should be interpreted as including not only certain technical feature elements explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

[0026] The term "consisting of..." means excluding any technical feature elements not explicitly listed. If this term is used in a claim, it will make the claim closed, so that it does not contain technical feature elements other than the technical feature elements explicitly listed, except for the conventional impurities related to them. If this term only appears in a clause of a claim, it only limits the elements explicitly listed in the clause, and the elements recorded in other clauses are not excluded from the overall claim.

[0027] Unless otherwise specified or limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0028] The orientation or position relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the drawings and are only for the convenience and simplification of description, and do not explicitly or implicitly indicate that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation of this document.

[0029] The following is a detailed description of the CT equipment emergency stop inertial parameter measurement device and method provided by the present invention. The contents not described in detail in the embodiments of the present invention belong to the prior art known to professional and technical personnel in the field. If no specific conditions are specified in the embodiments of the present invention, the conventional conditions in the field or the conditions recommended by the manufacturer are followed. The reagents or instruments used in the embodiments of the present invention, if the manufacturer is not specified, are all conventional products that can be purchased commercially.

[0030] like Figure 1 As shown, an embodiment of the present invention provides an inertial parameter measurement device for emergency stop of a CT device, comprising:

[0031] A pull-wire encoder 2, a magnetic base 3, a bipolar normally closed emergency switch 6 and a measurement and processing device 5; wherein,

[0032] The pull-wire encoder 2 is arranged on the frame 4 of the patient support of the CT device through the magnetic seat 3, and the pull-wire end of the pull-wire encoder 2 is fixedly connected to the bed board 1 of the patient support;

[0033] One pole of the bipolar normally closed emergency switch 6 is connected to the emergency stop switch control line 7 of the CT device, and the other pole is connected to the start switch of the measurement and processing device 5, which can synchronously control the start of the measurement and processing device after the emergency stop switch of the CT device is activated;

[0034] The measuring and processing device 5 is electrically connected to the pulse signal output terminal of the draw-wire encoder 2, and can measure the number of pulse signals of the incremental draw-wire encoder 2 after startup, and obtain the moving distance of the patient support bed board according to the number of pulse signals.

[0035] In the above measuring device, the rope encoder 2 is a sampling incremental rope encoder.

[0036] In the above-mentioned measuring device, the incremental rope encoder samples a 2500-line incremental encoder.

[0037] In the above-mentioned measuring device, the draw-wire encoder 2 is arranged at the rear end of the frame 4 of the patient support of the CT device through the magnetic base 3 .

[0038] In the above measuring device, the measuring and processing device 5 adopts a single chip device 51 provided with a display 52. ​​Other measuring and processing devices can also be used, as long as they can record the number of pulse signals output by the pull rope encoder and calculate the distance moved by the bed board according to the number of pulse signals.

[0039] See also Figure 1 The embodiment of the present invention further provides a method for measuring inertial parameters of CT equipment when it is in emergency stop, using the above-mentioned device for measuring inertial parameters of CT equipment when it is in emergency stop, comprising:

[0040] The drawstring encoder is arranged on the frame of the patient support of the CT device through a magnetic seat, and the drawstring end of the drawstring encoder is fixed on the bed board of the patient support;

[0041] Connect one pole of the bipolar normally closed emergency switch to the control line of the emergency stop switch of the CT equipment, and the other pole to the start switch of the measurement and processing device;

[0042] Electrically connect the measurement processing device to the pulse signal output terminal of the draw wire encoder;

[0043] During measurement, when the emergency stop switch of the CT equipment is activated, the bipolar normally closed emergency switch synchronously starts the measurement processing device, and the measurement processing device measures the number of pulse signals of the incremental rope encoder and obtains the moving distance of the patient support bed board based on the number of pulse signals.

[0044] In the above method, the measurement processing device obtains the moving distance of the patient support bed board according to the number of pulse signals in the following manner, including:

[0045] The moving distance of the patient support bed board is obtained by multiplying the number of pulse signals by the translation distance corresponding to each pulse signal.

[0046] In summary, the measuring device and method of the embodiment of the present invention can be started synchronously after the CT emergency stop switch is activated by using a drawstring encoder in conjunction with a measuring and processing device that is synchronously controlled by a bipolar normally closed emergency switch and a CT emergency stop switch, and the number of pulse signals of the drawstring encoder can be measured, and then the moving distance of the bed board of the patient support due to inertia after the emergency switch of the CT device is activated can be calculated based on the moving distance corresponding to each number of pulse signals. The measuring device is simple in structure and accurate in measurement, and can provide accurate data for detecting CT equipment.

[0047] In order to more clearly demonstrate the technical solution and technical effects provided by the present invention, the device and method for measuring inertial parameters of emergency stop of CT equipment provided by the embodiments of the present invention are described in detail below with reference to specific embodiments.

[0048] Example 1

[0049] like Figure 1 , 2 As shown, the CT equipment emergency stop inertia parameter measurement device of the present invention can accurately measure the distance that the bed board of the patient support of the CT equipment moves due to inertia after the emergency stop switch of the CT equipment is activated. The measuring device adopts an incremental draw-wire encoder, and the shell of the incremental draw-wire encoder is fixed to a certain position at the tail of the patient support by a magnetic seat, and the draw-wire end of the draw-wire encoder is fixed to the tail of the bed board of the patient support. In this way, when the bed board moves due to inertia, the incremental draw-wire encoder can be triggered by the draw-wire to generate a pulse signal. One pole of the bipolar normally closed emergency switch is connected to the connecting line of the CT emergency stop switch, and the other pole is connected to the measurement processing device. The bipolar normally closed emergency switch can synchronously start the measurement processing device after the CT emergency stop switch is activated. In this way, the measurement processing device will measure the number of pulse signals of the draw-wire encoder at the same time as the CT emergency switch is started, and calculate the distance moved after the CT patient support emergency switch is activated according to the moving distance corresponding to each pulse signal of the draw-wire encoder.

[0050] Preferably, the above-mentioned measurement processing device adopts a single-chip processing device with a display.

[0051] Preferably, the incremental rope-drawn encoder can use a 2500-line incremental rope-drawn encoder, and it is set to quadruple frequency when designing the circuit, so that the incremental rope-drawn encoder can generate 10,000 pulses for one rotation. The incremental rope-drawn encoder rotates 400mm per rotation, so one pulse of the rope-drawn encoder is 0.04mm. The distance that the bed board of the patient support moves due to inertia after the emergency stop is activated can be obtained by multiplying the measured number of pulses by 0.04mm.

[0052] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any form that the information constitutes prior art known to those skilled in the art.

Claims

1. A method for measuring inertial parameters of emergency stop of CT equipment, characterized in that: The following CT equipment emergency stop inertial parameter measurement device is used, including: a pull-wire encoder, a magnetic base, a bipolar normally closed emergency switch and a measurement processing device; wherein, The drawstring encoder is arranged on the frame of the patient support of the CT device through the magnetic seat, and the drawstring end of the drawstring encoder is connected to the bed board of the patient support; the drawstring encoder is a sampling incremental drawstring encoder; One pole of the bipolar normally closed emergency switch is connected to the control line of the emergency stop switch of the CT device, and the other pole is connected to the start switch of the measurement and processing device, so that the measurement and processing device can be synchronously controlled to start after the emergency stop switch of the CT device is activated; The measuring and processing device is electrically connected to the pulse signal output terminal of the draw-wire encoder, and can measure the number of pulse signals of the incremental draw-wire encoder after startup, and obtain the moving distance of the bed board of the patient support according to the number of pulse signals; The following steps are involved: The drawstring encoder is arranged on the frame of the patient support of the CT device through a magnetic seat, and the drawstring end of the drawstring encoder is fixedly connected to the bed board of the patient support; Connect one pole of the bipolar normally closed emergency switch to the control line of the emergency stop switch of the CT equipment, and the other pole to the start switch of the measurement and processing device; Electrically connect the measurement processing device to the pulse signal output terminal of the draw wire encoder; During measurement, when the emergency stop switch of the CT equipment is activated, the bipolar normally closed emergency switch synchronously starts the measurement processing device, and the measurement processing device measures the number of pulse signals of the incremental pull-wire encoder, and obtains the moving distance of the patient support bed board according to the number of pulse signals; the measurement processing device obtains the moving distance of the patient support bed board according to the number of pulse signals in the following manner, including: multiplying the number of pulse signals by the translation distance corresponding to each pulse signal to obtain the moving distance of the patient support bed board.

2. The method for measuring inertial parameters of CT equipment during emergency stop according to claim 1, characterized in that: The incremental draw wire encoder samples a 2500-line incremental encoder.

3. The method for measuring inertial parameters of CT equipment during emergency stop according to any one of claims 1 to 2, characterized in that: The pull-wire encoder is arranged at the rear of the patient support of the CT device through the magnetic seat.

4. The method for measuring inertial parameters of CT equipment during emergency stop according to any one of claims 1 to 2, characterized in that: The measurement processing device adopts a single chip device provided with a display.

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