WO2015089699A1 - 检测床防撞系统及防撞方法 - Google Patents

检测床防撞系统及防撞方法 Download PDF

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Publication number
WO2015089699A1
WO2015089699A1 PCT/CN2013/089508 CN2013089508W WO2015089699A1 WO 2015089699 A1 WO2015089699 A1 WO 2015089699A1 CN 2013089508 W CN2013089508 W CN 2013089508W WO 2015089699 A1 WO2015089699 A1 WO 2015089699A1
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Prior art keywords
stress
bed surface
detection
bed
stress data
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PCT/CN2013/089508
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English (en)
French (fr)
Inventor
王春雨
李玉庆
张强
闯丹
Original Assignee
Ge医疗系统环球技术有限公司
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Application filed by Ge医疗系统环球技术有限公司 filed Critical Ge医疗系统环球技术有限公司
Priority to PCT/CN2013/089508 priority Critical patent/WO2015089699A1/zh
Priority to CN201380081700.1A priority patent/CN105873520B/zh
Priority to US15/105,503 priority patent/US10646191B2/en
Publication of WO2015089699A1 publication Critical patent/WO2015089699A1/zh

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/54Control of apparatus or devices for radiation diagnosis
    • A61B6/547Control of apparatus or devices for radiation diagnosis involving tracking of position of the device or parts of the device
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/04Positioning of patients; Tiltable beds or the like
    • A61B6/0407Supports, e.g. tables or beds, for the body or parts of the body
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/10Safety means specially adapted therefor
    • A61B6/102Protection against mechanical damage, e.g. anti-collision devices
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/54Control of apparatus or devices for radiation diagnosis

Definitions

  • the present invention relates to anti-collision systems and methods, and more particularly to an anti-collision system and method for a test bed for use in medical applications.
  • MR Magnetic Resonance
  • the prior art proposes a technical method of using a switch to trigger a lifting movement, which installs a micro switch at a plurality of positions at the bottom of the bed surface, and when the bed surface collides, the collision force makes one of them. Or the pressure of the bed surface of the plurality of micro switches is reduced, and then triggered to the release state.
  • a microswitch When a microswitch is released, it sends an alarm signal to the external control unit, and the external control device can avoid the danger by controlling the detection bed to stop moving.
  • the judgment as to whether or not the impact occurs is not accurate enough.
  • the required triggering force is significantly larger, that is, if the bed surface collides with the same object at the same speed.
  • the switch may be released, but in the case of a patient carrying a large weight, it is possible that all the switches are not released, and the test bed cannot be stopped in time, and there is a greater risk.
  • An exemplary embodiment of the present invention provides a detection bed collision avoidance system.
  • the system includes a stress sensor, a collection device, and a control device.
  • the stress sensor is used to measure the surface of the support bed Stress, and output stress data.
  • the collecting device is connected to the stress sensor for collecting stress data outputted by each stress sensor;
  • the determining device is connected to the collecting device for determining whether the collected stress data monotonously changes within a preset time;
  • the control device is connected to the determining device When the judging device judges that the collected stress data monotonously changes within a preset time, the control device controls to detect that the bed surface stops moving
  • An exemplary embodiment of the present invention also provides a method of detecting bed collision avoidance.
  • the method comprises: measuring stress caused by supporting the bed surface of the test bed, and outputting stress data;
  • the bed surface of the test bed is controlled to stop moving.
  • FIG. 1 is a schematic flow chart of an embodiment of a method for preventing collision of a detecting bed according to an embodiment of the present invention
  • 3 ⁇ 4 2 is a schematic structural view of an embodiment of installing a stress sensor on a support of a test bed according to an embodiment of the present invention
  • FIG. 3 is a graph of stress data collected from a stress sensor when detecting a collision of a bed surface according to an embodiment of the present invention
  • FIG. 4 is a graph showing stress data collected from a stress sensor when detecting a patient's side body on a bed surface according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a frame of a detection bed collision avoidance system according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a detection bed according to an embodiment of the present invention, which exemplarily shows a plurality of collision positions.
  • FIG. 1 is a schematic flow chart of an embodiment of a method for preventing collision of a detection bed according to an embodiment of the present invention.
  • Fig. 2 is a schematic view showing the structure of an embodiment of a force sensor mounted on a holder of a test bed according to an embodiment of the present invention.
  • the test bed collision avoidance method of this embodiment is specifically applicable to the test bed shown in Fig. 2.
  • the test bed includes a test bed surface and a bracket 24 for supporting a test bed surface (not labeled), wherein the bracket 24 includes at least two beams 26.
  • the beam 26 is disposed in a direction substantially perpendicular to the direction in which the bracket 24 extends, and is disposed below the bed surface of the detecting bed, and each of the beams 26 is provided with a stress sensor 28.
  • the bracket 24 and its beam 26 are stressed by supporting the detection bed surface and the object to be tested (such as a patient), thereby causing internal deformation and stress generation, and each stress sensor 28 can be used to measure stress and extract stress data. .
  • an external force for example, a collision occurs during the lifting process, and deformation occurs inside the two beams to cause a stress change
  • the stress data output from the stress sensor 28 of the corresponding portion also changes.
  • the detection bed collision avoidance method of the present embodiment can judge whether the change is caused by a magnetic collision or simply because the patient is sideways in detecting the bed surface, etc., so that it can be accurately judged by analyzing the change of the stress data.
  • a magnetic collision is occurring on the bed surface of the test bed.
  • the detection bed collision avoidance method of this embodiment includes the following steps S10, S12, S14, and S16.
  • Step S10 measuring the force caused by supporting the bed surface of the test bed, and outputting the stress teaching data.
  • Step S12 Collect the stress number ⁇ .
  • Step S14 It is judged whether the collected stress data changes monotonously within a preset time.
  • Step S16 If the collected stress data monotonously changes within the preset time, the control bed surface is stopped from moving.
  • step S10 for example, since the bracket 24 and its beam 26 are both stressed by supporting the detection bed surface and the object to be detected thereon, the stress generated by the bracket 24 is measured by providing the stress sensor 28 on the bracket 24, and By outputting the corresponding stress data, the force on the bed surface of the test bed can be analyzed.
  • the detachable "supporting the stress caused by the bed surface of the test bed” is the stress measured by the stress transmitter 28, which specifically includes the stress generated by the bracket 24.
  • the above-mentioned “supporting the stress caused by the bed surface of the test bed” includes the stress generated by each of the beams 26. Since each of the beams 26 is directly disposed under the bed surface of the test bed and directly connected to the bed surface of the test bed, compared with other portions of the bracket 24, the stress transmitter 28 disposed on the beam 26 detects the reaction of the output stress data. The force on the bed surface is more accurate.
  • step S12 the stress output from the stress sensor 28 can be collected by the collecting device connected to each of the stress sensors 28 to collect the stress.
  • step S14 it is judged whether the collected stress data monotonously changes within a preset time, and if so, it is judged that the detection bed surface is colliding, otherwise, it is determined that no magnetic collision has occurred.
  • the above-mentioned “monotonic change” means that the stress data is incremented during the preset time, or the stress data is decremented within the preset time.
  • the "preset time” can be determined by multiple trials. For example, a collision usually results in a monotonic change in stress data over a period of time, and the change in stress caused by the patient's sideways is usually non-monotonic during that period of time (eg, In the embodiment, the "preset time” is less than 1 second. In this embodiment, the "preset time” is less than 1 second.
  • step S14 "determining whether the collected stress data monotonously changes within a preset time” further includes: determining whether the speed of the monotonous change of the collected stress data reaches the pre-predetermined time Set the value, if it is, you can judge The bed surface of the detecting bed is colliding, and step S16 can be performed, that is, the bed surface of the bed is controlled to stop moving.
  • step S16 can immediately send a signal to the lifting device of the detecting bed through the control device, and control it to stop moving the bed surface to avoid danger.
  • FIG. 3 is a graph of stress data collected from a stress sensor when detecting a collision of a bed surface according to an embodiment of the present invention
  • FIG. 4 is a graph showing stress data collected from a stress sensor when detecting a side body of a patient on a bed surface according to an embodiment of the present invention
  • the graph in Fig. 3, in the 1 second time period (such as the 4-5 second time period and the 6-7 second time period in Fig. 3), the stress data monotonously rises or monotonically decreases, and there is no repeated rise and fall, indicating this time. In the segment, the bed surface is colliding.
  • step S] 4 should be performed to control the bed surface to stop moving, for example, to stop lifting; in Figure 4, in the 1 second time period (as shown in Figure 5, 56 5-57.5 seconds) In the segment), the stress data is first lowered and then increased, indicating that the stress is not caused by the collision, and the bed surface can be continuously lifted and lowered.
  • step S10 and step S12 further include: converting the stress data outputted in step S10 from an analog voltage signal to a digital signal.
  • the stress generated by the bracket 24 supporting the bed surface of the detection bed is different according to different load-bearing sizes, and the stress rescue output of the stress sensor 28 at the same position is different according to the negative and small difference of the bed surface.
  • the patient's weight can also be estimated by comparing the two types of data; the stress data output by the stress sensor 28 when the bed surface is at zero load is detected, and the stress data output by the stress sensor 28 when the patient bed is implanted is detected.
  • the detection bed collision avoidance method of the embodiment may further include the following steps after the step S10: comparing the stress data output by the stress sensor 28 when detecting the zero load on the bed surface and outputting when the detection bed object is detected on the bed surface
  • the stress data is used to estimate the weight of the test object.
  • the doctor can help the patient to obtain the weight of the patient, and then select the appropriate test parameters according to the weight of the patient.
  • FIG. 5 is a schematic diagram of a frame of a detection bed collision avoidance system according to an embodiment of the present invention.
  • the detection bed collision avoidance system of the embodiment is specifically applicable to the detection bed shown in FIG. 2, and can be used to perform the detection shown in FIG.
  • a bed collision avoidance method includes at least one stress sensor 28, an acquisition device 30, a determination device 32, and a control device 34.
  • Each stress sensor 28 is used to measure the stress caused by the bed surface of the support bed and output stress data.
  • the collecting device 30 is connected to the stress sensor 28 for collecting the stress data output by each stress sensor 28.
  • the determining device 32 is connected to the collecting device 30, and is configured to determine whether the stress data of the collected set monotonously changes within a preset time, thereby determining whether the detecting bed surface is colliding, and if the collected stress data monotonously changes within the set time, Indicates that the bed surface of the test bed is colliding.
  • the control device 34 is connected to the judging device 32. When the judging device 32 judges that the collected stress data monotonously changes within a preset time, the control bed surface stops moving.
  • the determining device 32 is further configured to determine whether the speed of the monotonous change of the collected stress data reaches a preset value within the preset time.
  • the control device 34 controls the bed surface to stop moving.
  • the collecting device 30, the determining device 32 and the control device 34 can be disposed on the outside of the detecting bed 7 and integrated, communicate with each stress sensor 28 through the collecting device 30, and pass through the control device 34 to the detecting bed.
  • the lifting device sends a control signal.
  • the control device 34 immediately sends a signal to the lifting device of the detecting bed to control it to stop moving the bed surface to avoid Dangerous.
  • the number of the stress sensors may be at least two, correspondingly disposed on at least two beams of the bracket, and the at least two beams are disposed below the bed surface of the detecting bed.
  • two stress sensors 28 are disposed on the bracket 24 for supporting the bed surface of the test bed, and specifically, on the two beams 26 of the bracket 24.
  • the stress data output by each stress sensor 28 is an analog voltage signal
  • the detection bed collision avoidance system of the embodiment further includes an analog/digital converter (not shown), and each stress sensor 28 and the collecting device 30 are connected.
  • the stress data output from each stress sensor 28 is converted from an analog voltage signal to a digital signal, and then sent to the acquisition device 30.
  • the detection bed collision avoidance system of the present embodiment may further include a weight estimating device (not shown) that is connectable to the stress sensor 28, which estimates by comparing the stress data of the stress sensor 28.
  • the weight of the object to be measured Therefore, it is possible to help the doctor to obtain the weight of the patient, and then to select appropriate examination parameters according to the weight of the patient.
  • Figure 6 is a schematic illustration of a test bed provided by one embodiment of the present invention, exemplarily showing a plurality of locations where a collision occurs, such as P1-P12.
  • Table 1 shows the different loads of the invention on the bed surface of the test bed. Under the size, the collision force generated at each collision position P1-P12 can be seen from Table 1. The same collision occurs at the same collision position. Even if the difference in the size of the load is large, the collision force is basically the same, so at the moment of collision The force generated by the bracket will not be greatly different due to the difference in load size.
  • the stress caused by supporting the bed surface of the test bed is measured, and the stress data is collected and judged. Regardless of whether there is a patient on the bed surface of the test bed, the collision can cause an instantaneous change of stress. Therefore, as long as it is judged that the collected stress data monotonously changes within a preset time, it is judged that the bed surface of the test bed is colliding, so it will not cause Compared with the prior art, the judgment error caused by the different weights greatly improves the accuracy of the judgment, so that when the bed surface of the test bed collides, it can be controlled to stop moving in time to avoid danger.

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Abstract

一种检测床防撞系统及防撞方法,该防撞系统包括:应力传感器(28),用于测量支撑检测床床面引起的应力,并输出应力数据;采集装置(30),其与所属应力传感器(28)相连,用于采集各所属应力传感器(28)输出的应力数据;判断装置(32),与所属采集装置(30)相连,用于判断采集的应力数据是否在预设时间内单调变化;控制装置(34),与所述判断装置(32)相连,当所述判断装置(32)判断采集的应力数据在预设时间内单调变化时,所述控制装置(34)控制检测床床面停止移动。

Description

检测床防撞系统及防撞方法 技术领域
本发明涉及防撞系统和方法, 尤其涉及一种可用于医疗中使用的检测床 的防撞系统和方法。 背景抆术
在诸如 X射线、 计算机断层扫描( Computer Tomography, CT )、 磁共振
( Magnetic Resonance, MR )等医疗检测设备已经广泛被使用来进行疾病监 测, 检测床作为一个重要部件, 其承载着检测对象。 然而, 检测床在升降过 程中, 床面有可能与椅子、 担架等发生碰撞, 有时甚至会撞到患者, 存在较 大的危险。
为了解决这一问题, 现有技术提出了利用开关触发停止升降动作的技术 方茱, 该方茉在床面底部的多个位置安装微型开关, 在床面发生碰撞的时候, 碰撞力使得其中一个或多个微型开关所受床面压力减小, 进而被触发至译放 状态。 当有微型开关被释放时, 其向外部控制装置发出报警信号, 外部控制 装置即可通过控制检测床停止运动来避免发生危险。
但是,由于触发微型开关释放的碰撞力是随着床面负重的改变而改变的, 对于是否发生撞击的判断也不够准确。 例如, 相比较零负重, 当床面上承栽 一位体重较大的患者, 所需的触发力明显要大很多, 也就是说, 如果床面以 同样的速度与同样的物体发生碰撞, 在无患者的情况下有可能会释放开关, 但是在承载体重较大的患者的情况下, 有可能所有开关都没有被释放, 此时 检测床不能及时停止运动, 存在较大危险。
因此, 需要提供一种新的捡测床防撞系统及防撞方法, 使得检测床床面 发生碰撞时, 能够及时控制其停止移动, 避免发生危险。 发明内容
本发明的示例性实施例提供了一种检测床防撞系统。 该系统包括应力传 感器、 采集装置及控制装置。 该应力传感器用于测量支撑检测床床面引起的 应力, 并输出应力数据。 该采集装置与应力传感器相连, 用于采集各应力传 感器输出的应力数据; 该判断装置与采集装置相连, 用于判断采集的应力数 据是否在预设时间内单调变化; 该控制装置与判断装置相连, 判断装置判 断采集的应力数据在预设时间内单调变化时, 控制装置控制检测床床面停止 移动
本发明的示例性实施例还提供了一种检测床防撞方法。 该方法包括: 测量支撑检测床床面引起的应力, 并输出应力数据;
采集该应力数椐;
判断采集的应力数据是否在预设时间内单调变化;
如杲采集的应力数据在该预设时间内单调变化, 控制检测床床面停止移 动。
通过下面的详细描述、附¾以及权利要求,其他特征和方面会变得清楚. 附图说明
通过结合附图对于本发明的示例性实施例进行描述, 可以更好地理解本 发明, 在附图中:
图 1 为本发明实施例提供的检测床防撞方法的一个实施例的流程示意 图;
¾ 2为本发明实施例在检测床的支架上安装应力传感器的一个实施例的 结构示意图;
图 3为本发明实施例在检测床床面发生碰撞时从应力传感器采集的应力 数据的曲线图;
图 4为本发明实施例在检测床床面上的患者侧身时从应力传感器采集的 应力数据的曲线图;
图 5为本发明一个实施例提供的检测床防撞系统的框架示意图; 图 6为本发明一个实施例提供的检测床的示意图, 其示例性示出了多个 发生碰撞的位置。 具体实施方式
以下将描述本发明的具体实施方式, 需要指出的是, 在这些实施方式的 具体描达过程中, 为了进行简明扼要的描述, 本说明书不可能对实际的实施 方式的所有特征均作详尽的描达。 应当可以理解的是, 在任意一种实施方式 的实际实施过程中, 正如在任意一个工程项目或者设计项目的过程中, 为了 实现开发者的具体目标, 为了满足系统相关的或者商业相关的限制, 常常会 做出各种各样的具体决策, 而这也会从一种实施方式到另一种实施方式之间 发生改变 此外, 还可以理解的是, 虽然这种开发过程中所作出的努力可能 是复杂并且冗长的, 然而对于与本发明公开的内容相关的本领域的普通技术 人员而言, 在本公开揭露的技术内容的 上进行的一些设计, 制造或者生 产等哭更只是常规的技术手段, 不应当理解为本公开的内容不充分。
除非另作定义, 权利要求书和说明书中使用的技术术语或者科学术语应 当为本发明所属技术领域内具有一般技能的人士所理解的通常意义。 本发明 专利申请说明书以及权利要求书中使用的 "第一"、 "第二,' 以及类似的词语 并不表示任何顺序、 数量或者重要性, 而只是用来区分不同的组成部分。 "一 个"或者 "一" 等类似词语并不表示数量限制, 而是表示存在至少一个。 "包 括" 或者 "包含" 等类似的词语意指出现在 "包括" 或者 "包舍" 前面的元 件或者物件涵盖出现在 "包括,, 或者 "包含" 后面列举的元件或者物件及其 等同无件, 并不排除其他元件或者物件。 "连接"或者 "相连"等类似的词语 并非限定于物理的或者机械的连接, 也不限于是直接的还是间接的连接。
图 1 为本发明实施例提供的检测床防撞方法的一个实施例的流程示意 ¾。 图 2为本发明实施例在检测床的支架上安装 力传感器的一个实施例的 结构示意图。 本实施例的检测床防撞方法具体可应用于图 2所示的检测床。
如图 2所示, 该检测床包括检测床床面和支架 24, 支架 24用于支撑检 测床床面 (未标注), 其中支架 24包括至少两个横梁 26。 该横梁 26沿着与 支架 24延伸方向大致垂直的方向设置, 其设于检测床床面的下方, 各橫梁 26上设有应力传感器 28。支架 24及其横梁 26由于支撑检测床床面及其上承 栽的检测对象(比如病人) 而受力, 从而可能发生内部形变, 产生应力, 各 应力传感器 28可用于测量应力并徐出应力数据。 当检测床床面受到外力, 例 如在升降过程中发生碰撞, 两个横梁内部发生形变产生应力变化, 则相应部 位的应力传感器 28输出的应力数据也会变化。
本实施例的检测床防撞方法通过分析应力数据的变化, 可以判断这种变 化是由于磁撞引起的, 或者仅仅是由于患者在检测床床面上的侧身等动作引 起的, 因此可以准确判断出检测床床面是否正在发生磁撞。 如图 1所示, 本实施例的检测床防撞方法包括以下步骤 S10、 S12、 S14 和 S16。
步骤 S10: 测量支撑检测床床面引起的 力, 并输出应力教据。
步骤 S12: 采集该应力数椐。
步骤 S14: 判断采集的应力数据是否在预设时间内单调变化。
步骤 S16: 如果采集的应力数据在该预设时间内单调变化, 控制检测床 床面停止移动。
步骤 S10中, 例如, 由于支架 24及其横梁 26都由于对检测床床面及其 上的检测对象起支撑作用而产生应力, 通过在支架 24上设置应力传感器 28 测量支架 24产生的应力, 并输出相应的应力数据, 即可对检测床床面的受力 情况进行分析。
可逸地, 上迷的 "支撑检测床床面引起的应力" 即应力传慼器 28测量到 的应力, 其具体包括支架 24产生的应力。
进一步, 上迷的 "支撑检测床床面引起的应力" 包括各横梁 26产生的应 力。 由于各横梁 26直接设于检测床床面下方, 直接与检测床床面连接, 相比 支架 24的其它部位, 设置在横梁 26上的应力传慼器 28, 其输出的应力数据 所反应的检测床床面的受力情况更为准确,
步骤 S12具体可通过与各应力传感器 28相连的采集装置,以领设频率采 集应力传感器 28输出的应力救椐。
在步骤 S14中, 判断采集的应力数据是否在预设时间内单调变化, 如果 是, 则判断检测床床面正在发生碰撞, 否则, 判断为未发生磁撞。 上述的 "单 调变化", 是指在该预设时间内, 应力数据递增, 或者, 在该预设时间内, 应 力数据递减。 该 "预设时间" 可通过多次试验来确定, 例如, 发生碰撞通常 导致应力数据在一段时间内单调变化, 而患者侧身引起的应力变化在该段时 间内的更化通常是非单调 (例如, 时而增大时而减小) 的, 则可将该段时间 确定为 "预设时间", 本实施例中, 该 "预设时间" 小于 1秒。
由于床面碰撞能够引起应力的瞬间变化, 使得相对于患者侧身、 坐卧等 动作引起的应力变化, 床面碰撞引起的应力变化在预设时间内的范围更大, 即变化速度更快, 因此, 为了进一步提升判断碰撞的准确率, 步骤 S14中, "判断采集的应力数据是否在预设时间内单调变化" 还包括: 判断采集的应 力数据在该预设时间内单调变化的速度是否达到预设值, 如果是, 则可判断 检测床床面正在发生碰撞, 可执行步骤 S16, 即控制检测床床面停止移动, 否则, 判断为未发生 ί並撞, 检测床床面可以继续移动, 例如进行升降。 例如, 当检测床床面在升降过程中, 步骤 S14判断出其正在发生碰撞时, 步骤 S16 可立即通过控制装置向检测床的升降设备发送信号, 控制其停止移动检测床 床面, 避免发生危险,
图 3为本发明实施例在检测床床面发生碰撞时从应力传感器采集的应力 数据的曲线图; 图 4为本发明实施例在检测床床面上的患者侧身时从应力传 感器采集的应力数据的曲线图。 图 3中, 在 1秒时间段(如图 3中的 4-5秒 时间段以及 6-7秒时间段) 内, 应力数据单调上升或单调下降, 没有反复上 升和下降的情况,说明此时间段内床面正在发生碰撞,此时应当执行步骤 S] 4 , 以及时控制床面停止移动, 例如停止升降; 图 4中, 在 1秒时间段(如图 4 中的 56 5-57.5秒时间段) 内, 应力数据先降低后升高, 说明不是由于碰撞引 起的应力变化, 可以继续对床面进行升降橾作。
可选地, 步驟 S10中输出的应力数据为模拟电压信号, 则步骤 S10和步 骤 S12之间还包括: 将步骤 S10中输出的应力数据从模拟电压信号转换为数 字信号.
另外, 经过测试得知,对应不同的负重大小, 支架 24支撑检测床床面产 生的应力也不同,则同一位置的应力传感器 28输出的应力救据根据床面负重 大小的不同而不同, 此还可还可通过比较以下两种数据来估算患者的体重; 检测床床面在零负载时应力传感器 28输出的应力数据, 以及,检测床床面在 栽有患者时应力传感器 28输出的应力数据。
因此, 本实施例的检测床防撞方法在步骤 S10之后还可包括以下步骤: 通过比较应力传感器 28 在检测床床面零负载时输出的应力数据以及在检测 床床面栽有检测对象时输出的应力数据, 估算该检测对象的重量。 通过本步 骤, 可以帮助医生获取患者的重量, 进而根据患者的重量选择合适的检查参 数。
图 5为本发明一个实施例提供的检测床防撞系统的框架示意图, 本实施 例的检测床防撞系统具体可应用于图 2所示的检测床, 并可用于执行图 1所 示的检测床防撞方法, 其包括至少一个应力传感器 28、 采集装置 30、 判断装 置 32以及控制装置 34。
各应力传感器 28用于测量支撑床床面引起的应力, 并输出应力数据。 采集装置 30与应力传感器 28相连,用于采集各应力传感器 28输出的应 力数据.
判断装置 32与采集装置 30相连, 用于判断釆集的应力数据是否在预设 时间内单调变化, 进而判断检测床床面是否正在发生碰撞, 如果采集的应力 数据在 设时间内单调变化, 则说明检测床床面正在发生碰撞。 控制装置 34 与判断装置 32相连, 当判断装置 32判断采集的应力数据在预设时间内单调 变化时, 控制检测床床面停止移动,
可选地,判断装置 32还用于判断采集的应力数据在该预设时间内单调变 化的速度是否达到预设值, 如杲是, 控制装置 34控制检测床床面停止移动。
可逸地, 上述 "预设时间" 小于 1秒。
本实施例中, 采集装置 30、 判断装置 32以及控制装置 34可设置在检测 床外部 7 并集成在一起, 通过采集装置 30与各应力付感器 28通信, 并通过 控制装置 34向检测床的升降设备发送控制信号。
例如, 当图 2中的检测床床面在升降过程中, 判断装置 32判断出其正在 发生碰撞时,控制装置 34立即向检测床的升降设备发送信号, 控制其停止移 动检测床床面, 避免发生危险。
进一步, 上述应力传感器的数量可为至少两个, 对应设置在所述支架的 至少两个横梁上, 所迷至少两个横梁设于所述检测床床面的下方。 例如图 2 所示, 两个应力传感器 28设置在用于支撑检测床床面的支架 24上, 具体地, 对应设置在该支架 24的两个橫梁 26上。
可选地,各应力传感器 28输出的应力数据为模拟电压信号,本实施例的 检测床防撞系统还包括模拟 /数字转换器(图中未示出), 连接各应力传感器 28和采集装置 30, 用于将各应力传感器 28输出的应力数据从模拟电压信号 转换为数字信号后, 发送给采集装置 30。
可选地, 本实施例的检测床防撞系统还可包括重量估算装置 (图中未示 出),其可与应力传感器 28相连, 该重量估算装置通过比较应力传感器 28在 的应力数据, 估算该撿测对象的重量。 因此, 可以帮助医生获取患者的重量, 进而根据患者的重量选捧合适的检查参数。
图 6为本发明一个实施例提供的检测床的示意图, 其示例性示出了多个 发生碰撞的位置, 例如 Pl-P12。 表 1显示了本发明在检测床床面的不同负载 大小下, 在各碰撞位置 P1-P12产生的碰撞力, 由表 1可知, 在相同的碰撞位 置发生相同的碰撞, 即使负栽大小差别较大, 产生的碰撞力也基本一样, 因 此在碰撞的瞬间, 支架产生的^力¾化也不会由于负载大小的不同而存在较 大差异。
Figure imgf000008_0002
Figure imgf000008_0001
可见, 上述实施例提供的检测床防撞系统和防撞方法中, 通过测量支撑 检测床床面引起的应力, 并采集应力数据对其进行判断。 不论检测床床面上 是否栽有患者, 碰撞都能够引起应力的瞬间变化, 因此只要判断采集的应力 数据在预设时间内单调变化时, 说明判断检测床床面正在发生碰撞, 因此不 会造成负重不同带来的判断误差,相较现有技术, 大大提升了判断的准确性, 使得检测床床面发生碰撞时, 能够及时控制其停止移动, 避免发生危险。
上面已经描述了一些示例性实施例。 然而, 应该理解的是, 可以做出各 种修改.例如,如果所描述的技术以不同的顺序执行和 /或如果所描述的系统、 架构、 设备或电路中的组件以不同方式被组合和或被另外的组件或其等同物 替代或补充, 则可以实现合适的结杲。 相应地, 其他实施方式也落入权利要 求的保护范围内。

Claims

1、 一种检测床防撞系统, 包括:
应力传感器, 用于测量支撑^^床床面引起的应力, 并输出应力数据; 采集装置, 其与所达应力传感器相连, 用于采集各所述应力传感器输出 的应力数据;
判断装置, 与所述采集装置相连, 用于判断耒集的应力数据是否在预设 时间内单调变化; 及
控制装置, 与所述判断装置相连, 当所述判断装置判断采集的应力数据 在预设时间内单调变化时, 所述控制装置控制检测床床面停止移动。
2、根椐权利要求 1所述的检测床防撞系统,其中所述判断装置还用于判 断采集的应力数据在所迷预设时间内单调变化的速度是否达到预设值, 如果 是, 所述控制装置控制检测床床面停止移动。
3、根据权利要求 1或 2所述的检测床防撞系统,其中所述应力传感器设 于所述检测床床面的支架上, 所述支架用于支撑所述检测床床面.
4、根椐权利要求 3所述的检测床防撞系统,其中所迷 力传感器的数量 为至少两个, 对应设置在所述支架的至少两个横梁上。
5、根据权利要求 1或 2所述的检测床防撞系统,其中还包括重量估算装 置, 其与所述应力传慼器相连, 用干通过比较所述应力传感器在检测床床面 零负载时输出的应力数据以及所达应力传感器在检测床床面栽有检测对象时 输出的应力数据, 估算所述检测对象的重量。
6、 一种检测床防撞方法, 包括:
>则量支撑检测床床面引起的应力, 并输出应力数据;
采集所述应力数据;
判断采集的应力数椐是否在预设时间内单调变化;
如果采集的应力数据在所达预设时间内单调变化, 控制检测 床面停止 移动'
7、根据权利要求 6所述的检测床防撞方法,其中判断采集的应力数据是 否在预设时间内单调变化包括:
判断采集的应力数据在所述 设时间内单调变化的速度是否达到预设 值, 如果是, 控制检测床床面停止移动.
8、根据权利要求 6或 7所述的检测床防撞方法,其中所述支撑检测床床 面引起的应力包括用于支撑所迷检测床床面的支架产生的应力。
9、根据权利要求 8所述的检測床防撞方法, 其特征在于, 所达支架包括 至少两个横梁, 所迷至少两个横梁设于所述检测床床面的下方, 所述支撑检 测床床面引起的应力包括各所达横梁产生的应力。
10、 根据权利要求 6或 7所述的检测床防撞方法, 其中所迷测量支撑检 测床床面引起的应力, 并输出应力数据的步骤之后还包括:
通过比较所述应力传感器在所述检测床床面零负载时输出的应力数据以 及所达应力传感器在所达检测床床面载有检测对象时输出的应力数据, 估算 所述检测对象的重量。
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