A personnel safety assessment system for operating platforms subject to instantaneous strong impact and vibration

Abstract

The present invention provides a safety assessment system for personnel on an operating platform subjected to instantaneous strong impact vibration, comprising: a vibration waveform detection device, an electrocardiograph and a waveform analysis device; the vibration waveform detection device comprises a vibration acceleration sensor and a vibration signal analyzer, the vibration acceleration sensor is arranged on a vibration source, and the vibration signal analyzer is electrically connected to transmit the vibration waveform of the vibration source to the waveform analysis device; the electrocardiograph collects the electrocardiogram of the operator and transmits it to the waveform analysis device; the waveform analysis device compares the received vibration waveform with the electrocardiogram, and assesses the safety of the operator subjected to instantaneous strong impact according to whether the ratio of the rise time and the fall time of the two waveforms is consistent. The present invention can solve the technical problem that when an instantaneous impact vibration test is conducted within a specified acceleration safety threshold, it is impossible to correctly assess whether the platform operator will be injured during the test.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical test safety assessment, and in particular to a personnel safety assessment system for an instantaneous strong impact vibration operating platform. Background Art

[0002] Currently, during transient high-impact vibration tests, the metal integrated operating room platform is vibrated by the vibration source in some test items, depending on the test requirements. During the test, operators sometimes need to enter the operating room to operate test objects (such as animals) and test equipment. In such cases, the transient high-impact shock generated by the vibration source can be transmitted directly to the human body through the operating room floor, causing damage to human tissues, such as internal organs.

[0003] To prevent damage to the human body caused by such instantaneous strong impacts, existing vibration acceleration platforms have developed corresponding safety assessment methods. This assessment method evaluates safety based on the acceleration safety threshold. That is, if the acceleration value exceeds a specific value, or the acceleration is maintained for a period of time exceeding the duration, it is considered that there is a safety problem and it will cause damage to the human body.

[0004] However, even if this assessment method is currently adopted, within the specified acceleration safety threshold, certain transient impact vibration tests may often cause injuries to platform operators or test animals, such as subendocardial hemorrhage, subcranial pia mater hemorrhage, and other irreversible organic injuries.

[0005] Therefore, there is an urgent need for a safety assessment system that can accurately assess whether a transient impact vibration test within a specified acceleration safety threshold will cause damage to the platform operator. Summary of the Invention

[0006] In response to the shortcomings of the existing technology, the present invention proposes a personnel safety assessment system for transient strong impact vibration operating platforms to solve the technical problem in the existing technology that when conducting transient impact vibration tests within a specified acceleration safety threshold, it is impossible to correctly assess whether the platform operator will be injured during the test.

[0007] The technical solution adopted by the present invention is a personnel safety assessment system for an instantaneous strong impact vibration type operating platform, comprising: a vibration waveform detection device, an electrocardiograph and a waveform analysis device;

[0008] The vibration waveform detection device includes a vibration acceleration sensor and a vibration signal analyzer. The vibration acceleration sensor is arranged on the vibration source and is electrically connected to the vibration signal analyzer. The vibration signal analyzer is electrically connected to the waveform analysis device and transmits the vibration waveform of the vibration source to the waveform analysis device.

[0009] The electrocardiograph is electrically connected to the waveform analysis device to collect the electrocardiogram of the operator and transmit it to the waveform analysis device;

[0010] The waveform analysis device compares the received vibration waveform with the electrocardiogram, and evaluates the safety of the instantaneous strong impact on the operator based on whether the ratio of the rising time and falling time of the two waveforms is consistent.

[0011] It can be seen from the above technical solution that the beneficial technical effects of the present invention are as follows:

[0012] When conducting transient shock and vibration tests within the specified acceleration safety threshold, it is possible to correctly assess whether damage will be caused to platform operators.

[0013] Furthermore, the vibration acceleration sensor is mounted on the vibration source in an adhesive manner.

[0014] Furthermore, the electrocardiograph uses electrocardiograph electrodes to collect the operator's electrocardiograph signals.

[0015] Furthermore, the waveform analysis device is an industrial computer.

[0016] Furthermore, the ratio of the rising time to the falling time of the vibration waveform is r1, and the ratio of the rising time to the falling time of the electrocardiogram waveform is r2. When r2 is consistent with r1, the safety assessment is unqualified.

[0017] Furthermore, it also includes a shock absorbing device, which is arranged on the platform operating seat.

[0018] Furthermore, the shock absorbing device includes a base plate and a seat cushion, and a plurality of shock absorbing springs are arranged between the base plate and the seat cushion. The two ends of each shock absorbing spring are respectively connected to the base plate and the seat cushion, and each shock absorbing spring has a different inclination angle with the base plate and the seat cushion.

[0019] It can be seen from the above technical solution that the beneficial technical effects of the present invention are as follows: the vibration acting on the operator can be adjusted to avoid periodic coupling resonance between the operator's heartbeat and the vibration of the vibration source, which may cause damage to the operator's cardiovascular system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0021] Figure 1 This is a system block diagram of embodiment 1 of the present invention;

[0022] Figure 2 Schematic diagram of vibration waveform of Example 1 of the present invention;

[0023] Figure 3 This is an electrocardiogram diagram of Example 1 of the present invention;

[0024] Figure 4 Schematic diagram of the comparison between the vibration waveform and the electrocardiogram of Example 1 of the present invention;

[0025] Figure 5 Schematic diagram of the shock absorbing device of embodiment 2 of the present invention.

[0026] Reference numerals:

[0027] 1-seat cushion, 2-base plate, 3-shock absorber spring. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0029] It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0030] Example 1

[0031] This embodiment provides a personnel safety assessment system for operating platforms with transient strong shock and vibration. Figure 1 As shown, it includes a vibration waveform detection device, an electrocardiograph and a waveform analysis device, as follows:

[0032] The vibration waveform detection device is electrically connected to the waveform analysis device and is used to detect vibration data from the vibration source and convert the vibration data into a vibration waveform graph before transmitting it to the waveform analysis device. In a specific embodiment, the vibration waveform detection device includes a vibration acceleration sensor and a vibration signal analyzer.

[0033] The vibration acceleration sensor is provided on the vibration source to detect vibration data of the vibration source. The selection of the vibration acceleration sensor is not limited and can be implemented in any manner achievable in the prior art, such as the YMC2106C. Optionally, the vibration acceleration sensor is provided on the vibration source by bonding.

[0034] The vibration signal analyzer is electrically connected to the vibration acceleration sensor. The electrical connection method is not limited and can be implemented in any feasible method in the prior art. Preferably, a wired cable connection is used. The vibration signal analyzer receives the vibration data transmitted by the vibration acceleration sensor and converts it into a vibration waveform. Converting vibration data into a vibration waveform is a prior art. The vibration signal analyzer can be a portable vibration signal analyzer, and the model can be YMC9216S. The vibration waveform obtained by the conversion is as follows: Figure 2 shown.

[0035] The manner of electrical connection between the vibration waveform detection device and the waveform analysis device is not limited and may be implemented in any feasible manner in the prior art, preferably using a wired cable connection.

[0036] The electrocardiograph is electrically connected to the waveform analysis device and is used to detect the electrocardiogram of the operator and convert the electrocardiogram into an electrocardiogram before transmitting it to the waveform analysis device. In a specific embodiment, the electrocardiograph can be a portable electrocardiograph, model CM1200B. The electrocardiograph uses electrocardiogram electrodes to collect the electrocardiogram of the operator, and the converted electrocardiogram is as follows: Figure 3 shown.

[0037] The manner of electrical connection between the electrocardiograph and the waveform analysis device is not limited and may be implemented in any feasible manner in the prior art, preferably using a wired cable connection.

[0038] The waveform analysis device is used to compare the received vibration waveform with the electrocardiogram, and evaluate the safety of the operator from the instantaneous strong impact according to whether the ratio of the rise time and fall time of the two waveforms is consistent. In a specific embodiment, the waveform analysis device uses an industrial computer, and the model of the industrial computer is not limited. The industrial computer reads the rise time and fall time of the vibration waveform in the vibration waveform, that is, Figure 2 In the middle triangle area, calculate the ratio r1 of the rising time and falling time of the vibration waveform; read the rising time and falling time of the electrocardiogram waveform, that is, Figure 3 In the middle triangle area, calculate the ratio r2 of the rise time and fall time of the ECG waveform. When r2 is consistent with r1, that is, r2=r1, the operator's heart will produce periodic coupling resonance with the vibration of the vibration source. The principle is that the regular contraction and relaxation of the heart are periodic motions, and the change in acceleration of the instantaneous impact vibration is also a periodic motion. When the periodic change characteristics of the acceleration impact vibration are consistent with the periodic motion characteristics of the regular contraction and relaxation of the heart, this periodic coupling resonance may cause damage to the operator's cardiovascular system.

[0039] The working principle of Example 1 is described in detail below:

[0040] After entering the operating room and before commencing the test, the operator attached the vibration waveform detection device's vibration acceleration sensor to the vibration source, placed the electrocardiograph's electrodes on their heart, and activated the vibration signal analyzer and electrocardiograph. Prior to the test, the operator ensured that the vibration source's vibration parameters were within the safety threshold for acceleration.

[0041] After the test starts, the vibration source vibrates for a short time (in principle, no more than 5 seconds) according to the determined vibration parameters, and then the test is paused. The industrial computer will receive the vibration waveform and electrocardiogram transmitted by the vibration signal analyzer and electrocardiograph respectively. Then the industrial computer reads the rising and falling time of the vibration waveform in the vibration waveform and calculates the ratio r1; it reads the rising and falling time of the electrocardiogram waveform in the electrocardiogram and calculates the ratio r2. The operator can calculate the ratio r2 based on the values ​​of r1 and r2 and the waveform, such as Figure 4 As shown, the consistency of r2 and r1 is determined. If r2 is consistent with r1, it indicates that the operator's heartbeat at this time will produce periodic coupled resonance with the vibration of the vibration source, and the safety assessment is unqualified. Continuing the test with the original vibration parameters may cause damage to the operator's cardiovascular system.

[0042] By adopting the technical solution of this embodiment, it is possible to correctly assess whether a platform operator will be injured when conducting a transient impact vibration test within a specified acceleration safety threshold.

[0043] Example 2

[0044] In actual work, when the technical solution of Example 1 is used to determine that the safety of a certain operator is not up to standard when a certain vibration parameter is used to conduct a transient impact vibration test, it is generally not convenient to replace the operator, and the operator still needs to find a way to continue the test with this vibration parameter.

[0045] In order to solve the above technical problems, based on Example 1, the following technical solutions are adopted:

[0046] The safety assessment system also includes a shock absorbing device, which is arranged on the platform operating seat.

[0047] When the operator is sitting on the seat to test the shock-absorbing device, the vibration of the vibration source will be transmitted to the shock-absorbing device, which will change its vibration waveform, thus avoiding periodic coupling resonance between the operator's heartbeat and the vibration of the vibration source.

[0048] In a specific embodiment, Figure 5As shown, the shock absorbing device includes a base plate 2 and a seat cushion 1. A plurality of shock-absorbing springs 3 are provided between the base plate and the seat cushion. The two ends of each shock-absorbing spring are respectively connected to the base plate and the seat cushion, and have different inclination angles with the base plate and the seat cushion. The shock-absorbing springs are set to be connected with the base plate and the seat cushion at an angle with different inclination angles because when vibration acts on the human body, it will produce an impact in three directions on the human body, namely, the X-axis represents chest→back, the Y-axis represents left→right, and the Z-axis represents head→feet. If the shock-absorbing springs are connected vertically to the base plate and the seat cushion, the impact of the vibration on the human body in one direction can only be changed. However, when the shock-absorbing springs are set to be connected with different inclination angles to the base plate and the seat cushion, the impact of the vibration on the human body in three directions can be changed.

[0049] In this embodiment, multiple shock-absorbing devices are configured for different vibration parameters. The shock-absorbing springs in each shock-absorbing device are different, which can change the vibration waveform of the vibration source under different vibration parameters. When in use, the shock-absorbing device can be placed on the platform operating seat.

[0050] By adopting the technical solution of this embodiment, the vibration acting on the operator can be adjusted to avoid periodic coupling resonance between the operator's heartbeat and the vibration of the vibration source, which may cause damage to the operator's cardiovascular system.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A personnel safety assessment system for operating platforms subject to instantaneous strong impact and vibration, characterized in that: include: Vibration waveform detection device, electrocardiograph and waveform analysis device; The vibration waveform detection device includes a vibration acceleration sensor and a vibration signal analyzer, wherein the vibration acceleration sensor is arranged on the vibration source and is electrically connected to the vibration signal analyzer; the vibration signal analyzer is electrically connected to the waveform analysis device and transmits the vibration waveform diagram of the vibration source to the waveform analysis device; The electrocardiograph is electrically connected to the waveform analysis device to collect the electrocardiogram of the operator and transmit it to the waveform analysis device; The waveform analysis device compares the received vibration waveform with the electrocardiogram, and evaluates the safety of the instantaneous strong impact on the operator based on whether the ratio of the rising time to the falling time of the two waveforms is consistent.

2. The personnel safety assessment system for transient strong impact and vibration operating platforms according to claim 1 is characterized in that: The vibration acceleration sensor is arranged on the vibration source in a bonding manner.

3. The personnel safety assessment system for transient strong impact vibration operating platform according to claim 1 is characterized in that: The electrocardiograph uses electrocardiograph electrodes to collect electrocardiograph signals of the operator.

4. The personnel safety assessment system for transient strong impact and vibration operating platforms according to claim 1 is characterized in that: The waveform analysis device is an industrial computer.

5. The personnel safety assessment system for transient strong impact and vibration operating platforms according to claim 1 is characterized in that: The ratio of the rising time and the falling time of the vibration waveform is r1, and the ratio of the rising time and the falling time of the ECG waveform is r2. When r2 is consistent with r1, the safety assessment is unqualified.

6. The personnel safety assessment system for transient strong impact vibration operating platforms according to claim 1 is characterized in that: It also includes a shock absorbing device, which is arranged on the platform operating seat.

7. The personnel safety assessment system for transient strong impact vibration operating platform according to claim 6 is characterized in that: The shock absorbing device comprises a bottom plate and a seat cushion, a plurality of shock absorbing springs are arranged between the bottom plate and the seat cushion, two ends of each shock absorbing spring are respectively connected to the bottom plate and the seat cushion, and each shock absorbing spring has a different inclination angle with the bottom plate and the seat cushion.

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