CN115184800A

CN115184800A - Component life detection method

Info

Publication number: CN115184800A
Application number: CN202210888285.1A
Authority: CN
Inventors: 陈佳剑; 王�华
Original assignee: Siemens Shanghai Medical Equipment Ltd
Current assignee: Siemens Shanghai Medical Equipment Ltd
Priority date: 2022-07-26
Filing date: 2022-07-26
Publication date: 2022-10-14

Abstract

A method for detecting the service life of a mechanical motion device component, wherein the mechanical motion device comprises a motor component, a motion component and a bearing component, the motor component drives the motion component and the bearing component to move, and the method comprises the following steps: acquiring a first current of the motor part when the mechanical motion device is in a first state; comparing the first current with a specific value to obtain a service life detection result of the motor component and/or the moving component; and outputting the detection result. According to the present disclosure, a component life detection method is provided that can predict the life of a component without adding sensors.

Description

Component life detection method

Technical Field

The disclosure relates to the field of machinery, in particular to a method and a device for detecting service life of a mechanical movement device component.

Background

Mechanical motion devices often consist of multiple mechanical parts that wear, deform or degrade over time during relative motion, eventually exceeding their useful life. Replacing parts after they have experienced problems clearly can create a poor user experience, which is a concern in the industry to detect the life of the parts, as it is necessary to avoid the relief of such a situation. In this case, it is a solution to detect the lifetime by using an additional sensor, but this causes a problem of increasing the cost.

Disclosure of Invention

In view of the above, the present disclosure provides a method and an apparatus for detecting a lifetime of a mechanical moving part.

According to an exemplary embodiment of the present disclosure, a method for detecting a lifetime of a component of a mechanical motion device, the mechanical motion device including a motor component, a motion component, and a bearing component, the motor component driving the motion component and the bearing component to move, the method includes: acquiring a first current of the motor part when the mechanical motion device is in a first state; comparing the first current with a specific value to obtain a service life detection result of the motor component and/or the moving component; and outputting the detection result.

According to an exemplary embodiment of the present disclosure, the first state is a state in which the bearing member is located at the first position, moves at the first speed in the first direction, and bears the first weight.

According to an exemplary embodiment of the disclosure, wherein obtaining the first current of the motor part when the mechanical movement device is in the first state comprises: acquiring a plurality of first currents of the mechanical motion device in the first state in a first time period, and counting statistical information of the plurality of first currents by using a first statistical method; said comparing said first current to a particular value comprises: comparing the statistical information of the first current with the characteristic value.

According to an exemplary embodiment of the present disclosure, wherein the specific value is obtained by: acquiring a plurality of second currents of the mechanical movement device in a first state in a second time period, and using the first statistical method to count statistical information of the plurality of second currents, wherein the statistical information is used as the specific value; wherein the second time period is earlier than the first time period.

According to an exemplary embodiment of the present disclosure, wherein the first weight is obtained by: responding to the movement of the bearing part in the second direction, acquiring a plurality of third currents of the motor part, counting the average value of the third currents, and calculating the first weight; wherein the second direction comprises a component in a direction perpendicular to the horizontal direction.

According to an exemplary embodiment of the present disclosure, the mechanical movement device is a medical carrying bed, the carrying member is a bed board, the motor member drives the bed board to move, the movement member includes a coil spring and a cable, a first end of the cable is connected to the coil spring, a second end of the cable is connected to the bed board and moves along with the movement of the bed board, a part of the first end is received in the coil spring, and the coil spring has a pulling force to tension the cable; wherein comparing the first current with a particular value to obtain a life detection result of the motor component and/or the moving component comprises: and detecting two current values of the motor component which moves in two opposite directions at the same speed under the condition that the bed board is at the same position and bears the same weight, calculating a difference value of the current values, responding to the fact that the difference value is smaller than the specific value, and continuing for a third time to obtain a service life detection result of the coil spring.

According to an exemplary embodiment of the present disclosure, the mechanical motion device is a medical bed, the bearing component is a bed plate, the motor component drives the bed plate to move, wherein comparing the first current with a specific value to obtain a life detection result of the motor component and/or the motion component includes: and detecting the current of the motor part of the bed board at the same position, along the same direction and at the same speed and under the condition of bearing the same weight, responding to the fact that the current value is larger than the specific value and lasting for the fourth time, and obtaining the service life detection result of the motor part.

According to an exemplary embodiment of the present disclosure, the mechanical motion device is a medical bed, the bearing component is a bed plate, the motor component drives the bed plate to move through a transmission belt, wherein comparing the first current with a specific value to obtain a life detection result of the motor component and/or the motion component includes: and detecting the delay time of the motor part in the current rapid rising stage after each start, and responding to the fact that the delay time is larger than the specific value and lasts for the fifth time to obtain the service life detection result of the transmission belt.

According to an exemplary embodiment of the present disclosure, a mechanical motion system is characterized by comprising: the mechanical motion device comprises a motor part, a motion part and a bearing part, and the motor part drives the motion part and the bearing part to move; at least one processor; a computer storage medium storing a computer program which, when executed by the at least one processor, implements a method according to any one of the embodiments of the present disclosure.

According to an exemplary embodiment of the present disclosure, a computer-readable storage medium stores a computer program, wherein the computer program, when executed by a processor, implements a method in an embodiment of the present disclosure.

According to an exemplary embodiment of the disclosure, a computer program product comprising a computer program, wherein the computer program realizes the method in the embodiments of the disclosure when executed by a processor.

According to the method for detecting the service life of the mechanical movement device part, the service life of the mechanical movement part can be detected.

Drawings

The foregoing and other features and advantages of the present disclosure will become more apparent to those of ordinary skill in the art to which the present disclosure pertains by describing in detail preferred embodiments thereof with reference to the attached drawings, wherein:

FIG. 1 is a schematic view of a mechanical motion device in an exemplary embodiment of the present disclosure;

FIG. 2 is a schematic illustration of current over time in an exemplary embodiment of the disclosure;

FIG. 3 is a schematic illustration of current over time in an exemplary embodiment of the disclosure;

FIG. 4 is a schematic illustration of current over time in an exemplary embodiment of the disclosure;

FIG. 5 is a schematic view of a mechanical motion device in an exemplary embodiment of the present disclosure;

fig. 6 is a schematic diagram of current versus load in an exemplary embodiment of the disclosure.

Wherein the reference numbers are as follows:

1 horizontal motor	2 vertical motor
		3 Main control unit	4 system host
5 Collection	6 reporting
		7 storage/analysis	8 coil spring
9 Cable	10 bedstead

Detailed Description

In order to make the objects, technical solutions and advantages of the present disclosure more clear, the present disclosure is further described in detail by referring to the following examples. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In an exemplary embodiment, a method for detecting a lifetime of a component of a mechanical motion device according to the present disclosure includes: acquiring a first current of a motor part when a mechanical movement device is in a first state; comparing the first current with a specific value to obtain a service life detection result of the motor component and/or the moving component; and outputting a detection result. In mechanical motion devices, a motor is often used as a power component to drive a bearing component to move, so as to move a load on or in the bearing component in a predetermined manner. In addition to the carrier, the mechanical motion device often includes other motion components, such as a transmission component for transmitting the power of the motor to the carrier, or a cable for transmitting electrical signals between different components, or a receiving device for receiving an excess portion of the cable in motion, and so on. The movement of these components can cause wear on their own, thereby affecting their life. In the present embodiment, the life of each component is detected without adding an additional sensor. The inventors have found in operation that when the mechanical movement means is in the first state, including but not limited to states in which the speed, direction, relative position and load of movement of the various components are the same, the motor currents should be the same. If the motor current is greatly changed with a preset specific value in the first state, the problem of the motor component or the moving component is shown, and through the principle, the detection result of the service life of the motor and/or the moving component can be obtained by comparing the current with the specific value. And then outputting the detection result for early warning and prompting to replace the component. The output detection result can be directly displayed for the user, and can also be sent to a manufacturer through a network, and the manufacturer can acquire information in the background to be used for replacing the user. Of course, two specific values may be set, and when the current value of the motor part is compared with the first specific value, a first result is obtained, which indicates that the life of the motor part and/or the moving part is about to be reached, and at this time, the manufacturer may stock the spare parts, and when the current value of the motor part is compared with the second specific value, a second result is obtained, and at this time, the manufacturer may go to the door immediately for the user to replace.

Referring to fig. 1 in detail, in fig. 1, the mechanical movement device is a medical bed, wherein the motor part includes a horizontal motor 1 and a vertical motor 2, wherein the horizontal motor 1 controls a bed board of a bearing part of the bed to move horizontally, and the vertical motor 2 controls a vertical movement of the bed board. Therefore, when a patient with a load is on the bed plate, the patient can be sent to the designated position along two directions. The main control unit 3 on the sickbed is used for acquiring 5 current data of the motor along two paths, reporting 6 the current data, transmitting the current data to the system host 4, storing/analyzing 7 the current data by the system host, and processing the current data of the motor to obtain a service life analysis result. In the exemplary implementation of fig. 1, there is a system host 4, so that a less powerful master unit 3 can be used, just to collect data and transmit it to a more powerful system host 4. In this way, the main control unit 3 does not perform specific analysis, but uses the system host 4 for processing, and the system host 4 may be, for example, a system host of a medical imaging CT, MR, PET or X-ray apparatus, and has a strong processing capability, and it is beneficial to reuse the processing capability of the system host 4 for cost. However, the system host 4 is not essential, and the analysis and storage may be performed using the main control unit 3 for the case where the system host 4 is not present.

In an exemplary embodiment, the first state is a state in which the load bearing member is in the first position, is moving in the first direction at a first speed, and is bearing a first weight. In general, when the load bearing members are in the same state, the states of the other moving members are correspondingly the same. It is often sufficient to detect only the state of the load bearing member, in particular, the position, speed, moving direction and load bearing weight of the load bearing member, and when these parameters are the same, it can be considered that the mechanical moving device is in the same state, and the current of the motor member is obtained, which can be used to determine the life of the motor member and/or the moving member.

In an exemplary embodiment, wherein obtaining the first current of the motor part when the mechanical motion device is in the first state comprises: acquiring a plurality of first currents of the mechanical movement device in a first state in a first time period, and counting statistical information of the plurality of first currents by using a first statistical method; comparing the first current to a particular value includes: the statistical information of the first current is compared to the characteristic value. A single current value detection often fails to account for the problem and may be subject to interference from abnormal conditions. Aging of the component is a process which changes slowly with time, so that statistical information of the current in a period of time can be obtained to be more accurate. For example, the average value of the current values in 1 week or 1 month is counted, or the maximum first 10% and the minimum second 10% of the data in 1 week or one month are removed, and the average value of the remaining 80% of the data is counted, or the median value of the current values in 1 week or 1 month is counted, or the maximum first 10% and the minimum second 10% of the data in 1 week or one month are removed, and the median value of the remaining 80% of the data is counted. These methods are all optional, with a period of 1 week or 1 month being exemplary and not the best option, and may be selected based on the life of the part, such as two days, two weeks, three weeks, two months.

In one exemplary embodiment, wherein the specific values are obtained by: acquiring a plurality of second currents of the mechanical movement device in the first state in a second time period, counting statistical information of the plurality of second currents by using a first statistical method, and taking the statistical information as a specific value; wherein the second time period is earlier than the first time period. The acquisition of a specific value is important because the detection of the lifetime is usually a result of comparing the acquired data with a specific value. The specific value can be preset, and the administrator can preset the tested data in the system as the specific value. However, the individual parts of each mechanical movement device have errors, and the assembly may cause slight differences between each mechanical movement device, so that the specific value is preferably different for each mechanical movement device. In the present embodiment, statistical information of the current of the mechanical movement device at an earlier time period is taken as a specific value. This is because, in the early stage of use of the mechanical exercise device, each component must be within a normal use range, and the statistical value thereof should be a normal value. The second time period is selected to be earlier than the first time period, but the second time period is not necessarily selected within a period of time of the initial use of the mechanical motion device, and may be counted after the break-in period, for example, after the break-in period of several weeks after the initial use, so that an accurate specific value is more easily obtained. The period of the break-in period can be determined according to actual conditions.

In an exemplary embodiment, wherein the first weight is obtained by: responding to the movement of the bearing part in the second direction, acquiring a plurality of third currents of the motor part, counting the average value of the third currents, and calculating a first weight; wherein the second direction comprises a component in a direction perpendicular to the horizontal direction. The weight of the load may be entered manually by an administrator, but this is often cumbersome and may or may not be known by the administrator. In this embodiment, the inventor has found that when the load is placed on the load bearing member and vertical movement is generated, the current of the motor is related to the weight of the load. Taking the medical hospital bed in fig. 1 as an example, when there are different loads on the hospital bed, i.e. patients with different body weights, the value of the current of the vertical motor during vertical movement shows a positive correlation with the current load, and the larger the load, the larger the current. Referring to fig. 6, the current of the motor when the bed plate moves in two directions under different loads is shown in fig. 6, wherein the horizontal axis represents the speed in mm/s. The current load weight on the sickbed can be obtained by calculating the average value of the motor current in the process of one vertical movement and converting. The conversion can be performed according to an empirical formula, or a conversion table can be prepared in advance, and the conversion can be performed by table lookup, which is not described herein again. For the direction of motion, if limited to only vertical motion calculation, it may not be present in one motion, in this embodiment the vertical component in the motion is extracted to complete the weight calculation. For the medical bed of fig. 1, the relationship between the vertical motor and the vertical movement can be calculated to obtain the weight value.

In an exemplary embodiment, referring to fig. 5 in particular, the mechanical movement device is a medical bed, the carrying component is a bed board (not shown), the motor component drives the bed board to move, the movement component includes a coil spring 8 and a cable 9, a first end of the cable 9 is connected to the coil spring 8, a second end of the cable 9 is connected to the bed board and moves along with the movement of the bed board, a part of the first end is received in the coil spring 8, and the coil spring 8 has a pulling force to tension the cable; wherein comparing the first current with a specified value to obtain a life detection result of the motor component and/or the moving component comprises: and detecting two current values of two motor parts moving in opposite directions and at the same speed under the condition that the bed plate is at the same position and bears the same weight, calculating a difference value of the two current values, responding to the difference value, determining that the difference value is smaller than a fixed value, and continuing for a third time to obtain a service life detection result of the coil spring 8. The bed plate of the hospital bed is often connected with a cable 9 for the purpose of signal transmission and the like. The cable needs to move along with the bed plate mounted on the bed frame 10, so that the cable 9 may be worn and twisted along with the movement of the bed plate. The solution is to adopt a coil spring 8 to store a cable 9. The coil spring 8 ages after a period of use and does not produce sufficient tension to tighten the cable 9, which requires replacement. The inventors have found that as the performance of the cable 9 decreases, the values of the motor current in opposite directions change, as shown in fig. 4. Specifically, after the cable 9 ages, the difference in the values of the two directions decreases, which indicates that the tension of the cable 9 is insufficient. When the tension of the cable is insufficient for a period of time, which is expressed as a third time, specifically, one week, one month, etc., it is detected that the coil spring 8 has aged, and the life detection result of the coil spring 8 is output. For the case of the dual motors shown in fig. 1, the currents of the two motors need to be superimposed, and the currents of each motor can be respectively determined according to the motion components and considered comprehensively. For example, the current of each motor is weighted, the magnitude of the deviation of the two motor currents from a predetermined value is calculated, and the two motor currents are multiplied by the weighted value and added, thereby calculating the deviation of one total current from the predetermined value.

In an exemplary embodiment, the mechanical movement device is a medical bed, the support member is a bed plate, and the motor member moves the bed plate, wherein comparing the first current with the specific value to obtain the life detection result of the motor member and/or the movement member includes: and detecting the current of the motor part of the bed board at the same position, along the same direction and at the same speed and under the condition of bearing the same weight, responding to the fact that the current value is larger than a fixed value and lasting for the fourth time, and obtaining the service life detection result of the motor part. The motor itself also has a life, and in this embodiment, the life of the motor itself is predicted. The inventor finds that after the motor is aged, the current can be increased under the same state of the mechanical movement device, and through the phenomenon, the current of the motor under the same condition can be detected, when the current is increased to a certain degree and lasts for a fourth time, such as a week, a month and the like, the motor is detected to be aged, and the service life detection result of the motor is output. In the embodiment shown in fig. 1, the motors comprise a horizontal motor 1 and a vertical motor 2, in which case the life of the two motors is considered separately for different movements. For example, the life of the horizontal motor 1 is considered in the horizontal movement, and the life of the vertical motor 2 is considered in the vertical movement. Of course, the motion can also be divided into horizontal motion and vertical motion, so that the life of the horizontal motor 1 and the vertical motor 2 can be examined separately in the same motion.

In an exemplary embodiment, the mechanical movement device is a medical bed, the support member is a bed plate, the motor member drives the bed plate to move through the transmission belt, wherein comparing the first current with the specific value to obtain the life detection result of the motor member and/or the movement member includes: and detecting the delay time of the motor part in the current rapid rising stage after each start, responding to the delay time which is larger than a fixed value and lasts for the fifth time, and obtaining the service life detection result of the transmission belt. The transmission belt is a key component of motor transmission, is in a tightening state in a brand new state, is tightly attached to the gear, and has a small gap, so that the transmission precision is ensured. However, as the belt ages, the belt tightness decreases and the backlash increases, resulting in a decrease in the accuracy of the movement. The inventors have found that as the belt ages, a slight delay in the rise in current after the motor begins to output is caused. By monitoring the current variation trend in the initial time period (for example, 200 ms) of each movement, if the delay time of the current rapid rising stage relative to the output starting of the motor is increased and the phenomenon lasts for the fifth time, the belt aging can be judged, and the prompt for maintenance or replacement can be judged according to the delay degree.

In various embodiments, the duration of time can be viewed in at least two ways, the first being that the phenomenon lasts for a fixed time, the second being that the phenomenon occurs with each movement, and the movement lasts multiple times (e.g., 100 times).

In an exemplary embodiment, the degradation of the motor components and the moving components is determined. As previously mentioned, the aging of each component is not consistent, motor aging is the increase in current, coil spring aging is the change in the difference in current moving between the two directions, and the belt is the delay in the phase of rapid rise in current, and the difference between these patterns helps to determine the component that is causing the aging. Further, there are still subtle differences that can be used to determine components that are subject to degradation. For example, if there are multiple conveyors, the manner of delaying may also differ. For example, a particular conveyor belt may be susceptible to aging for a certain period of time, such as around one year, while another conveyor belt may be susceptible to aging for around two years. For another example, one of the belts is rejected quickly after aging, and the other belt is rejected slowly, so that which belt is rejected can be identified by how quickly it enters.

In an exemplary embodiment, the mechanical movement device is a hospital bed. Inside the sickbed, there are various moving parts, such as vertical push rod, horizontal drag chain, driving belt, etc. These moving parts wear, deform or degrade as the bed is used over time. When the situation develops to a certain degree, phenomena such as abnormal sound, vibration, accuracy deterioration and the like can be generated, and the use of a user is influenced. While the user may eventually require a maintenance person to replace the component to ameliorate the problem, the poor user experience that has previously been created can affect the reputation of the product. Additional sensors may be installed in the relevant locations of the moving parts to check the use of the parts, but this increases the cost of the product. The inventor finds that the motor current is a parameter with high specificity, and can be detected and made into some protection logics according to the value of the motor current. The motor current of the sickbed is related to the load, and the current difference can be caused by different configurations and use conditions of different places. In order to further reduce the false alarm rate, the current data of the sickbed motor in a single field is collected in full time. And analyzing a historical current trend data model formed at a specific position under a specific load condition from the historical motor current data, and when the current at the point is found to be gradually increased or decreased within a period of time, indicating that the state of the corresponding component is changed. And when the current at the detection point changes in a single direction for a long time and reaches the early warning proportion, the early warning information is prompted to a user, and corresponding parts are checked and replaced.

The technical scheme in the exemplary embodiment has at least the following advantages:

pure software logic, no hardware modification is required;

the hospital bed historical data is used as a basis, so that misjudgment caused by current difference of different sites is avoided, and early warning is more accurate;

and a prompt is given before the service life cycle of the part is about to end, so that the use of a user is not influenced, and the user experience is enhanced.

In an exemplary embodiment, referring in particular to fig. 1, the main control unit 3 of the patient's bed collects motor current from the corresponding motor (horizontal motor 1 or vertical motor 2) at certain time intervals (e.g. 50 ms) when the movement occurs, and reports the real-time current and the corresponding patient's bed real-time position, speed and direction to the system host 4 for storage. The system host 4 adds the current load to the database in conjunction with registration information, or measurement information, for the patient. This forms a data list structured as "position-velocity-direction-load-current". One such data table is maintained for each motor (horizontal/vertical).

Position (mm)	Speed (mm/s)	Direction (0/1)	Load (kg)	Current (mA)
					2	200	1	100	1500
10	200	1	100	1390
					…	…	…	…	…

The system host 4 analyzes the historical data at intervals (e.g., 1 month). And selecting some position points (for example, 0mm,100mm,500mm,1500mm and 2000 mm), and performing trend statistics on the current of the position points under the same speed, direction and load conditions to form a 'current-time' relation table under certain conditions. Specifically, referring to fig. 2 and 3, fig. 2 is a current trend graph with a position point of 0mm, a speed of 200mm/s, a direction of 1 and a load of 100 kg. FIG. 3 is a graph of the current trend at a location point of 500mm, a speed of 100mm/s, a direction of 0, and a load of 80 kg. The change ratio of the latest current value at the position point (under a certain condition) to the initial installation current value is referred to as Δ. When several similar points are found by analysis and Δ exceeds the warning value (e.g. 50%) at the same time, and the trend of the change has been continued for a while (e.g. 6 months), it can be considered that the life-related characteristic of the corresponding moving part has changed, and one or more of aging, wear and deformation may occur. At this time, the back office is required to prompt maintenance personnel to go to the site for inspection, maintenance or component replacement. The time and the alarm value in this embodiment are exemplary and can be set by those skilled in the art according to actual situations.

In an exemplary embodiment, the following moving part connected to the bed body and generating continuous acting force on the sickbed can also detect the current difference value and the time relation of the same position point in two directions under the same speed and load condition. Taking the coil spring 8 component in fig. 5 as an example, referring to fig. 4 in particular, when the difference between the currents in two directions at 3 position points (200mm, 600mm, 1000mm) is found to be significantly reduced and lasts for a period of time (e.g. 6 months), it can be determined that the acting force of the connected sickbed moving component is reduced, and the life of the connected sickbed moving component is up to the end, at which time, the change is prompted.

According to another aspect of the disclosed embodiment, a mechanical motion system is provided, which is characterized by comprising: the mechanical motion device comprises a motor part, a motion part and a bearing part, and the motor part drives the motion part and the bearing part to move; at least one processor; a computer storage medium storing a computer program which, when executed by the at least one processor, implements a detection method according to any of the above embodiments of the present disclosure.

According to another aspect of the embodiments of the present disclosure, a computer-readable storage medium storing a computer program is provided, wherein the computer program, when executed by a processor, implements a detection method according to any of the above-mentioned embodiments of the present disclosure

According to another aspect of embodiments of the present disclosure, a computer program product is proposed, comprising a computer program, wherein the computer program, when executed by a processor, implements a detection method according to any of the above-mentioned embodiments of the present disclosure.

Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.

Program code for implementing the methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowchart and/or block diagram to be performed. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine or entirely on the remote machine or server.

In the context of this disclosure, a computer-readable storage medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may be a computer readable signal medium or a computer readable storage medium. A computer readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a readable storage medium include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present disclosure may be performed in parallel, sequentially or in different orders, and are not limited herein as long as the desired results of the technical aspects of the present disclosure can be achieved.

Although embodiments or examples of the present disclosure have been described with reference to the accompanying drawings, it is to be understood that the above-described methods, systems and apparatus are merely exemplary embodiments or examples and that the scope of the present invention is not limited by these embodiments or examples, but only by the claims as issued and their equivalents. Various elements in the embodiments or examples may be omitted or may be replaced with equivalents thereof. Further, the steps may be performed in an order different from that described in the present disclosure. It is important that as technology evolves, many of the elements described herein may be replaced with equivalent elements that appear after the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

Claims

1. A method for detecting the service life of a mechanical motion device component, wherein the mechanical motion device comprises a motor component, a motion component and a bearing component, the motor component drives the motion component and the bearing component to move, and the method comprises the following steps:

acquiring a first current of the motor part when the mechanical motion device is in a first state;

comparing the first current with a specific value to obtain a service life detection result of the motor component and/or the moving component;

and outputting the detection result.

2. The inspection method according to claim 1, wherein the first state is a state in which the bearing member is located at a first position, moves at a first speed in a first direction, and bears a first weight.

3. The detection method of claim 2, wherein obtaining the first current of the motor component when the mechanical motion device is in the first state comprises:

acquiring a plurality of first currents of the mechanical motion device in the first state in a first time period, and counting statistical information of the plurality of first currents by using a first statistical method;

said comparing said first current to a particular value comprises:

comparing the statistical information of the first current with the characteristic value.

4. The detection method according to claim 3, wherein the specific value is obtained by:

acquiring a plurality of second currents of the mechanical movement device in a first state in a second time period, and using the first statistical method to count statistical information of the plurality of second currents, wherein the statistical information is used as the specific value;

wherein the second time period is earlier than the first time period.

5. The detection method of claim 2, wherein the first weight is obtained by:

responding to the movement of the bearing part in the second direction, acquiring a plurality of third currents of the motor part, counting the average value of the third currents, and calculating the first weight;

wherein the second direction comprises a component in a direction perpendicular to the horizontal direction.

6. The detection method according to claim 1, wherein the mechanical motion device is a medical carrying bed, the carrying member is a bed board, the motor member drives the bed board to move, the motion member includes a coil spring and a cable, a first end of the cable is connected with the coil spring, a second end of the cable is connected with the bed board and moves along with the movement of the bed board, a part of the first end is received in the coil spring, and the coil spring has a pulling force to tension the cable; wherein comparing the first current with a specified value to obtain a life detection result of the motor component and/or the moving component comprises:

and detecting two current values of the motor part which moves in two opposite directions at the same speed under the condition that the bed plate is at the same position and bears the same weight, calculating a difference value of the two current values, responding to the fact that the difference value is smaller than the specific value, and continuing for a third time to obtain a service life detection result of the coil spring.

7. The detection method according to claim 1, wherein the mechanical motion device is a medical bed, the bearing member is a bed board, and the motor member drives the bed board to move, wherein comparing the first current with a specific value to obtain the life detection result of the motor member and/or the motion member comprises:

and detecting the current of the motor part of the bed board at the same position, along the same direction and at the same speed and under the condition of bearing the same weight, responding to the fact that the current value is larger than the specific value and lasting for the fourth time, and obtaining the service life detection result of the motor part.

8. The detection method according to claim 1, wherein the mechanical motion device is a medical bed, the support member is a table board, and the motor member drives the table board to move through a transmission belt, wherein comparing the first current with a specific value to obtain a life detection result of the motor member and/or the motion member comprises:

and detecting the delay time of the motor part in the current rapid rising stage after each start, and responding to the fact that the delay time is larger than the specific value and lasts for the fifth time to obtain the service life detection result of the transmission belt.

9. A mechanical motion system, comprising:

the mechanical motion device comprises a motor part, a motion part and a bearing part, and the motor part drives the motion part and the bearing part to move;

at least one processor;

a computer storage medium storing a computer program which, when executed by the at least one processor, implements the method according to any one of claims 1-8.

10. A computer-readable storage medium storing a computer program, wherein the computer program realizes the method according to any one of claims 1-8 when executed by a processor.

11. A computer program product comprising a computer program, wherein the computer program realizes the method according to any of claims 1-8 when executed by a processor.