Device and method for detecting linear slide state

Abstract

A device and method for detecting the status of a linear slide, comprising a slider and a rail. The device includes: a sensor located at a position corresponding to the side surface of the rail, configured to detect vibration of the rail and generate a detection signal; and an analysis processor communicatively connected to the sensor, configured to determine the occurrence of an abnormality based on the level of the detection signal and at least one threshold value. This improves detection sensitivity.

Description

Technical Field

[0001] The present invention relates to a detection device, and in particular to a device and method for detecting the state of a linear slide rail. Background Art

[0002] Existing detection mechanisms for linear slides, such as those described in Japanese Patent JP2018138817A, utilize sensors mounted on the upper surface of the slide's end and use the sensor's signal to determine if an anomaly has occurred. However, these mechanisms rely solely on time-domain signals to determine anomalies. This makes their anomaly detection mechanisms (e.g., thresholds) susceptible to environmental influences, resulting in a loss of precision.

[0003] Therefore, the conventional devices and methods for detecting the status of linear slide rails still have shortcomings and need to be improved. Summary of the Invention

[0004] Therefore, the main purpose of the present invention is to provide a device and method for detecting the status of a linear slide rail, which can overcome the problem of abnormal judgment being easily affected by the environment in the prior art and improve the detection sensitivity.

[0005] According to one embodiment of the present invention, a device for detecting the state of a linear slide rail is provided, wherein the linear slide rail includes a slider and a slide rail, the slider includes a receiving groove for accommodating the slide rail, the slider further includes two opposite side surfaces in the receiving groove, the slide rail includes two opposite side surfaces, the two side surfaces of the slider correspond to the two side surfaces of the slide rail respectively, and the device includes: at least one sensor, located at a position corresponding to the side surface of the slide rail (that is, facing the side surface of the slide rail, and can be attached to the side surface of the slide rail or separated from the side surface of the slide rail by a distance), and used to detect the vibration of the slide rail to generate a detection signal; and an analysis processor, which is communicatively connected to the at least one sensor, and is used to determine whether an abnormality has occurred based on the level of the detection signal and at least one threshold value.

[0006] According to one embodiment of the present invention, a method for detecting the state of a linear slide rail is provided. The linear slide rail includes a slider and a slide rail. The slider includes a receiving groove for accommodating the slide rail. The slider further includes two opposite side surfaces in the receiving groove. The slide rail includes two opposite side surfaces. The two side surfaces of the slider correspond to the two side surfaces of the slide rail, respectively. The method includes the following steps: (A) detecting the vibration of the slide rail via at least one sensor to generate a detection signal, wherein the sensor is located at the end of the slide rail and at or adjacent to the side surface of the slide rail; and (B) determining, via an analysis processor, whether an abnormality has occurred based on the level of the detection signal and at least one threshold value.

[0007] Therefore, the device and method for detecting the state of a linear slide provided by the present invention uses the method of comparing the first detection signal and the second detection signal to determine whether there is an abnormality, and is less susceptible to environmental interference, thereby greatly improving the detection sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a functional block diagram of a device for detecting a state of a linear slide rail according to an embodiment of the present invention;

[0009] Figure 2 A schematic diagram of installing two sensors on a linear slide rail according to an embodiment of the present invention;

[0010] Figure 3 for Figure 2 Exploded view of

[0011] Figure 4 for Figure 2 A partial enlarged view showing two sensors disposed on opposite sides of the end of the slide rail;

[0012] Figure 5 is a flow chart of a method for detecting a state of a linear slide rail according to an embodiment of the present invention; and

[0013] Figure 6 A schematic diagram of the verification device showing the locations of the three sensors;

[0014] Figure 7A This is a signal diagram from the test procedure, showing the results of the left sensor detecting the vibration of the slide rail along the Z axis in the initial state;

[0015] Figure 7B This is a signal diagram from the test procedure, showing the results of the left sensor detecting the vibration of the slide rail along the Z axis under abnormal conditions;

[0016] Figure 8A This is a signal diagram from the test process, showing the results of the upper sensor detecting the vibration of the slide along the Z axis in the initial state;

[0017] Figure 8B This is a signal diagram from the test procedure, showing the results of the upper sensor detecting the vibration of the slide rail along the Z axis under abnormal conditions;

[0018] Figure 9A This is a signal diagram from the test procedure, showing the results of the sensor on the right detecting the vibration of the slide along the Z axis in the initial state;

[0019] Figure 9BThis is a signal diagram from the test procedure, showing the results of the right sensor detecting the vibration of the slide rail along the Z axis under abnormal conditions;

[0020] Figure 10A This is a signal diagram from the test process, showing the results of the left sensor detecting the vibration of the slide rail along the X-axis in the initial state;

[0021] Figure 10B This is a signal diagram from the test procedure, showing the results of the left sensor detecting the vibration of the slide rail along the X-axis direction under abnormal conditions;

[0022] Figure 11A This is a signal diagram from the test process, showing the results of the upper sensor detecting the vibration of the slide rail along the X-axis in the initial state;

[0023] Figure 11B This is a signal diagram from the test process, showing the results of the upper sensor detecting the vibration of the slide rail along the X-axis direction under abnormal conditions;

[0024] Figure 12A This is a signal diagram from the test process, showing the results of the sensor on the right detecting the vibration of the slide rail along the X-axis in the initial state;

[0025] Figure 12B This is a signal diagram from the test procedure, showing the results of the right sensor detecting the vibration of the slide rail along the X-axis direction under abnormal conditions;

[0026] Figure 13A This is a signal diagram from the test process, showing the results of the left sensor detecting the vibration of the slide rail along the Y-axis in the initial state;

[0027] Figure 13B This is a signal diagram from the test procedure, showing the results of the left sensor detecting the vibration of the slide rail along the Y-axis under abnormal conditions;

[0028] Figure 14A This is a signal diagram from the test process, showing the results of the upper sensor detecting the vibration of the slide along the Y-axis in the initial state;

[0029] Figure 14B This is a signal diagram from the test procedure, showing the results of the upper sensor detecting the vibration of the slide rail along the Y-axis direction under abnormal conditions;

[0030] Figure 15A This is a signal diagram from the test process, showing the results of the sensor on the right detecting the vibration of the slide along the Y-axis in the initial state;

[0031] Figure 15BThis is a signal diagram from the test procedure, showing the results of the right sensor detecting the vibration of the slide rail along the Y-axis under abnormal conditions;

[0032] Figure 16 is a waveform diagram of a detection signal in the frequency domain according to an embodiment of the present invention;

[0033] Figure 17 A schematic diagram of positioning two sensors on a linear slide rail using a fixture according to an embodiment of the present invention;

[0034] Figure 18 A schematic diagram of installing two sensors on a linear slide rail according to an embodiment of the present invention;

[0035] Figure 19 A schematic diagram of installing two sensors on a linear slide rail according to an embodiment of the present invention;

[0036] Figure 20 A schematic diagram of installing two sensors on a linear slide rail according to an embodiment of the present invention; and

[0037] Figure 21 FIG. 4 is a flow chart of a method for detecting a linear slide state according to an embodiment of the present invention.

[0038] Description of symbols in the accompanying drawings:

[0039] 11: Sensor

[0040] 12: Analysis Processor

[0041] 121:Signal processing circuit

[0042] 122: Feature Analysis Department

[0043] 123: Threshold Supply Department

[0044] 124: Status Analysis Department

[0045] 13: Display

[0046] 20: Linear slide

[0047] 21: Slider

[0048] 211: side surface

[0049] 212: Bottom

[0050] 22: Slide rail

[0051] 221: side surface

[0052] 222: Upper surface

[0053] 223:End

[0054] 224: End face

[0055] 225: Keyhole

[0056] 226: Surface

[0057] 30: fixture

[0058] 32: Connecting part

[0059] 34: Clamping part

[0060] F: characteristic frequency

[0061] P1, P2, P3, P4, P5, P6: number of features

[0062] Q1, Z1, Q2, Z2, Z3, Q3: Level

[0063] R1: Area

[0064] S1, S2: Accommodating groove

[0065] TH1, TH4: first threshold

[0066] TH2, TH5: second threshold

[0067] TH3, TH6: third threshold

[0068] X: X-axis direction

[0069] Y: Y axis direction

[0070] Z: Z axis direction DETAILED DESCRIPTION

[0071] The following is a clear and complete description of the technical solution of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0072] Please refer to Figures 1 to 4As shown, the device provided by the present invention according to one embodiment is suitable for detecting the state of a linear slide rail. The linear slide rail 20 includes a slider 21 and a slide rail 22. The slider 21 includes a receiving groove S1, and the receiving groove S1 is used to accommodate the slide rail 22. The slider 21 further includes two opposite side surfaces 211 and a bottom surface 212 connecting the two side surfaces 211 in the receiving groove S1. The slide rail 22 includes two opposite side surfaces 221 and an upper surface 222 connecting the two side surfaces 221. The two side surfaces 211 of the slider 21 correspond to the two side surfaces 221 of the slide rail 22, respectively, and the bottom surface 212 of the slider 21 corresponds to the upper surface 222 of the slide rail 22. At least one rolling path is provided between the two side surfaces 211 of the slider 21 and the opposite sides (i.e., the two side surfaces 221) of the slide rail 22. The rolling path is used to accommodate the above-mentioned multiple rolling bodies, and the multiple rolling bodies contact and abut the slider 21 and the slide rail 22 in the rolling path.

[0073] The device includes two sensors 11, an analysis processor 12, and a display 13. The analysis processor 12 can be communicatively connected to the two sensors 11 and the display 13 (as needed). In this embodiment, the two sensors 11 are connected to the analysis processor 12 by wires, for example. However, the present invention is not limited to this embodiment; in other embodiments, the two sensors 11 can also be connected to the analysis processor 12 wirelessly.

[0074] The sensor 11 is, for example, a velocity sensor, an acceleration sensor, a microphone, or the like that can detect the vibration of the slide rail 22. Moreover, the configuration of the sensor 11 can be determined according to the operating principle of the selected sensor 11. In the present embodiment, the two sensors 11 are, for example, acceleration sensors that detect vibration by contacting the slide rail 22. Therefore, the two sensors 11 are configured to be attached to the end 223 of the slide rail 22 and approach the end surface 224, especially respectively attached to the two side surfaces 221 located at this end 223. Of course, in other embodiments, each sensor 11 may not approach the end surface 224, for example, it may be arranged at the middle section of the side surface 221 along the axial direction of the slide rail 22 or at any point, depending on the needs. The way in which the sensor 11 is attached to the end 223 of the slide rail 22 is, for example, locking, gluing, adsorption, or being clamped by a clamp. Taking the way in which the two sensors 11 are clamped by a clamp as an example, please refer to Figure 17In this embodiment, the two sensors 11 are positioned on the two side surfaces 221 using a clamp 30. The clamp 30 includes a connecting portion 32 and two clamping portions 34 connected to both ends of the connecting portion 32. The connecting portion 32 faces the end surface 224. The two clamping portions 34 face the two side surfaces 221 and extend along the axial direction of the slide rail 22. The elastic force of each clamping portion 34 clamps each sensor 11 between the corresponding clamping portion 34 and the corresponding side surface 221 to achieve the purpose of positioning the sensor 11. In this embodiment, each sensor The sensor 11 and the clamp 30 may be two independent mechanisms, but in other embodiments, each sensor 11 may be integrated with each clamping portion 34, or in some embodiments (not shown), the clamp may include a body and two clamping portions connected to both ends of the body and extending downward, the body is located at the upper surface 222 of the slide rail 22, and a fixing member (such as a screw) locks the body in the lock hole 225 of the upper surface 222, and each clamping portion is located at the position of each side surface 221 and clamps the sensor 11 to the position of each side surface 221. However, the present invention is not limited to the above-mentioned contact-type implementation. In another embodiment, the sensor may also be a microphone, etc., which detects vibration in a non-contact manner, so the sensor may face the side surface 221 and be separated from the side surface 221 by a distance, as long as the sensor is set at the position corresponding to the side surface 221.

[0075] In this embodiment, the two side surfaces 221 of the slide rail 22 are each concavely provided with an accommodating groove S2, and the two sensors 11 are respectively disposed at the bottom of the accommodating groove S2 on the two side surfaces 221. Figure 3 In this embodiment or other embodiments, as shown. Figure 3 、 18 As shown, the extent to which the sensor 11 occupies the travel of the slide rail 22 can be reduced by selecting the specifications and dimensions of the sensor 11. However, the present invention is not limited to the arrangement position described herein. In another embodiment, as Figure 19 、 20 As shown, the two sensors 11 can be respectively set in the area R1 on the two side surfaces 221 except for the accommodating groove S2, and this area R1 is not only close to the end surface 224, but also close to the surface 226 of the slide rail 22 that does not contact the slider 21 and is away from the slider 21; because the sensor 11 is set at a position that does not interfere with the movement of the slider 21, the maximum sliding distance that the slider 21 can slide on the slide rail 22 is the length of the slide rail 22 itself.

[0076] By means of the two sensors 11 disposed on opposite sides of the slide rail 22 , the device of the present invention can detect the vibration of the slide rail 22 to determine whether the operation of the linear slide rail 20 is abnormal.

[0077] Please refer to Figure 5, which is used to illustrate the method of detecting the state of the linear slide rail by this device. First, the two sensors 11 located on both sides of the slide rail 22 detect the vibration of the slide rail 22 to generate two detection signals (i.e., a first detection signal and a second detection signal), respectively, as shown in step S501, and further transmit the two signals to the analysis processor 12. The analysis processor 12 includes a signal processing circuit 121, a feature analysis unit 122, a threshold supply unit 123 and a state analysis unit 124. The state analysis unit 124 is electrically connected to the signal processing circuit 121, the feature analysis unit 122, the threshold supply unit 123 and the state analysis unit 124, as shown in FIG. Figure 1 shown.

[0078] At this time, the two signals are converted from time domain signals to frequency domain signals, for example, via a fast Fourier transform, through the conversion circuit of the signal processing circuit 121 of the analysis processor 12. Next, the filtering circuit of the processing circuit 121 can perform a first stage filtering on the two signals, for example, filtering out high-frequency components above the cutoff frequency with a low-pass filter, as shown in step S502. Then, the analysis processor 12 performs a characteristic frequency analysis on the first detection signal and the second detection signal after the first stage filtering through the characteristic analysis unit 122 to obtain the characteristic frequencies of the first detection signal and the second detection signal, as shown in step S503. Specifically, the characteristic analysis unit 122 includes, for example, a sampling circuit, so that the sampling circuit can sample the signal to obtain at least one signal sample as a characteristic frequency, for example Figure 16 Multiple characteristic frequencies F in .

[0079] Next, the state analysis unit 124 obtains the first threshold value TH1 from the threshold supply unit 123, compares the level (peak value) Z1 of the characteristic frequency of the first detection signal with the level (peak value) Z2 of the characteristic frequency of the second detection signal, and determines whether the absolute value of the difference between the levels Z1 and Z2 (level difference) is greater than or equal to the first threshold value TH1, as shown in step S504. For example, the level Z1 of the first characteristic frequency of the first detection signal and the level of the first characteristic frequency of the second detection signal are compared. The level of the characteristic frequency refers to the energy value, in dB. In this embodiment, the first threshold value TH1 can be set by the user to be greater than or equal to 3 dB. In other embodiments, the first threshold value TH1 is, for example, the difference between the absolute value of the difference and the level Z1 or Z2. Specifically, when level Z1 is larger than level Z2, the first threshold TH1 is the difference between the absolute value of the above difference and level Z2; when level Z1 is smaller than level Z2, the first threshold TH1 is the difference between the absolute value of the above difference and level Z1; when level Z1 is equal to level Z2, the first threshold TH1 is the difference between the absolute value of the above difference and either level Z1 or Z2.

[0080] In step S504 , when the absolute value of the difference is greater than or equal to the first threshold TH1 , the state analysis unit 124 determines that an abnormality occurs on one side of the linear guide rail 20 according to the comparison result, as shown in step S505 .

[0081] In step S504, when the absolute value of the difference is less than the first threshold value TH1, the state analysis unit 124 obtains the second threshold value TH2 from the threshold value supply unit 123, and compares the characteristic number P1 (first characteristic number, i.e., the number of characteristic frequencies of the first detection signal) of the first detection signal and the characteristic number P2 (second characteristic number, i.e., the number of characteristic frequencies of the second detection signal) of the second detection signal with the second threshold value TH2, and determines whether the characteristic number P1 and the characteristic number P2 are both greater than or equal to the second threshold value TH2, as shown in step S506. The second threshold value TH2 is, for example, greater than or equal to 2dB and can be set by the user. For example Figure 16 The sampling results shown have 8 characteristic frequencies F.

[0082] In step S506, when both the characteristic number P1 and the characteristic number P2 are greater than or equal to the second threshold TH2, the state analysis unit 124 obtains the third threshold TH3 from the threshold supply unit 123 and determines whether the level (peak) Q1 of the characteristic frequency of the first detection signal or the level (peak) Q2 of the characteristic frequency of the second detection signal is greater than or equal to the third threshold TH3, as shown in step S507. In this embodiment, the third threshold TH3 can be set by the user, for example, to a value greater than or equal to 3 dB above the initial value.

[0083] In step S507, when the level Q1 or the level Q2 is greater than or equal to the third threshold TH3, the status analysis unit 124 determines that an abnormality has occurred on both sides of the linear guide 20 based on the comparison result, as shown in step S508. Conversely, when the level Q1 or the level Q2 is less than the third threshold TH3, the status analysis unit 124 determines that the linear guide 20 is currently operating normally based on the comparison result, as shown in step S511.

[0084] In step S506, if either the characteristic number P1 or the characteristic number P2 is less than the second threshold TH2, the filter circuit of the signal processing circuit 121 performs a second stage of filtering on the first detection signal and the second detection signal, for example, by using a band-stop filter to remove the 60 Hz component, as shown in step S509. Next, the state analysis unit 124 obtains the second threshold TH2 from the threshold supply unit 123 and determines whether the characteristic number P3 (the third characteristic number, i.e., the number of characteristic frequencies of the first detection signal (i.e., the third detection signal) after the second stage of filtering) and the characteristic number P4 (the fourth characteristic number, i.e., the number of characteristic frequencies of the second detection signal (i.e., the fourth detection signal) after the second stage of filtering) are greater than or equal to the second threshold TH2, as shown in step S510.

[0085] In step S510, when the characteristic number P3 and the characteristic number P4 are both greater than or equal to the second threshold TH2, the analysis processor 12 executes step S507 to respectively determine whether the level (peak value of the characteristic frequency) Q1 of the first detection signal and the level (peak value of the characteristic frequency) Q2 of the second detection signal are greater than or equal to the third threshold TH3.

[0086] In step S510 , when the characteristic number P3 or the characteristic number P4 is smaller than the second threshold TH2 , the state analysis unit 124 determines that the linear guide rail 20 is currently operating normally based on the comparison result, as shown in step S511 .

[0087] Finally, the determination result of the state analysis unit 124 is transmitted to the display 13 to be presented to the on-site operator for reference. Thus, the on-site operator can quickly and immediately stop the operation of the abnormal linear guide 20.

[0088] Please refer to the following Figures 6 to 9B As shown in the figure, an experiment was conducted to verify the influence of the installation position of the sensor 11 on the detection result. In this experiment, three identical sensors 11 were first attached to the two side surfaces 221 and the upper surface 222 of the slide rail 22 at the end 223, namely the sensor 11 on the left, the sensor 11 on the right, and the sensor 11 on the top in the figure. Then, the slider was allowed to slide on the slide rail 22, and the three sensors 11 were allowed to detect the vibration of the slide rail 22 in the X-axis direction, the Y-axis direction, and the Z-axis direction. Figures 7A to 9B The vibration detection results in the Z-axis direction shown in the figure show that compared with the sensor 11 located at the top, the sensors 11 located on the left and right sides have a larger signal difference between the initial state and the abnormal state, so they can detect the occurrence of abnormalities more sensitively. The initial state refers to the state when a new and normal linear guide begins to operate. Figures 10A to 12B As shown in the X-axis direction vibration detection results, compared with the sensor 11 located at the top, the sensors 11 located at the left and right sides have a larger signal difference between the initial state and the abnormal state, so they can more sensitively detect the occurrence of abnormalities. Figures 13A to 15B The vibration detection results along the Y-axis direction show that, compared to the sensor 11 located at the top, the left and right sensors 11 have a greater signal difference between the initial state and the abnormal state, and therefore are more sensitive to abnormality detection. Therefore, it is clear from the aforementioned test procedures that the sensors 11 located on both sides of the slide rail 22 are more sensitive to abnormality detection.

[0089] While the above embodiments are based on an example in which two sensors 11 are disposed on opposite sides 221 of the end of the slide rail 22, the present invention is not limited thereto. In another embodiment, only one sensor 11 may be disposed on one side surface 221 of the slide rail 22 to detect the status of the linear slide rail 20.

[0090] Please refer to Figure 21 As shown, this device detects Figure 2 First, step S2101 is executed to detect the vibration of the linear guide rail 22 by the sensor 11 to generate a detection signal. Figure 1 After receiving the detection signal, the analysis processor 12 converts the signal from a time domain signal to a frequency domain signal. Then, steps S2102 and S2103 are executed. Steps S2102 and S2103 are similar to Figure 5 Therefore, the description of steps S2102 and S2103 can refer to steps S502 and S503 respectively. Figure 5 The relevant descriptions of steps S502 and S503 are not repeated here.

[0091] Next, step S2104 is executed, where the state analysis unit 124 obtains the first threshold value TH4 from the threshold value providing unit 123 and determines whether the level (peak value) Z3 of the characteristic frequency of the detection signal is greater than or equal to the first threshold value TH4. For example, the determination is made using the level Z3 of the first characteristic frequency of the detection signal. In this embodiment, the first threshold value TH4 can be set by the user to be greater than or equal to 3 dB.

[0092] In step S2104, when the level Z3 is greater than or equal to the first threshold TH4, the state analysis unit 124 determines that an abnormality has occurred in the linear guide 20, as shown in step S2107. Conversely, in step S2104, when the level Z3 is less than the first threshold TH4, the state analysis unit 124 obtains the second threshold TH5 from the threshold supply unit 123 and determines whether the characteristic number P5 (the first characteristic frequency, i.e., the number of characteristic frequencies of the detection signal) of the detection signal is greater than or equal to the second threshold TH5, as shown in step S2105. The second threshold TH5 can be set by the user to be greater than or equal to 2 dB, for example.

[0093] In step S2105, when the characteristic number P1 is greater than or equal to the second threshold value TH5, the state analysis unit 124 obtains the third threshold value TH6 from the threshold value providing unit 123 and determines whether the level (peak value) Q3 of the characteristic frequency of the detection signal is greater than or equal to the third threshold value TH6, as shown in step S2106. In this embodiment, the third threshold value TH6 can be set by the user, for example, to a value greater than 3 dB above the initial value.

[0094] In step S2106, when the level Q3 is greater than or equal to the third threshold TH6, the status analysis unit 124 determines that an abnormality has occurred in the linear guide 20, as shown in step S508. Conversely, when the level Q3 is less than the third threshold TH6, the status analysis unit 124 determines that the linear guide 20 is currently operating normally, as shown in step S2110.

[0095] In step S2105, when the feature number P5 is less than the second threshold TH5, step S2108 is executed, that is, the second stage of filtering is performed. Step S2108 is similar to Figure 5 Therefore, the description of step S2108 can be referred to the description of step S509 and will not be repeated here. Next, the state analysis unit 124 determines whether the characteristic number P6 (the second characteristic number, i.e., the number of characteristic frequencies of the detected signal after the second stage filtering) of the detected signal after the second stage filtering is greater than or equal to the second threshold TH5, as shown in step S2109.

[0096] In step S2109, when the characteristic number P6 is greater than or equal to the second threshold TH5, the analysis processor 12 executes step S2106. Conversely, in step S2109, when the characteristic number P6 is less than the second threshold TH5, the state analysis unit 124 determines that the linear guide 20 is currently operating normally, as shown in step S2110.

[0097] Finally, the determination result of the state analysis unit 124 is transmitted to the display 13 to be presented to the on-site operator for reference. Thus, the on-site operator can quickly and immediately stop the operation of the abnormal linear guide 20.

[0098] In summary, the various embodiments of the present invention provide a device and method for detecting the status of a linear slide rail. By mounting at least one sensor on the side of the end of the rail, not only is assembly and removal convenient, but the device's detection sensitivity is also enhanced. Furthermore, this device uses multiple thresholds to analyze the detection signals from the two sensors, thereby determining the possible location of a linear slide rail anomaly and reducing the impact of noise on the detection results. Furthermore, if the sensor is mounted on the side of the end of the rail, close to the surface of the rail away from the slider, the slider can slide along the entire rail without affecting the rail's sliding travel.

[0099] In summary, the above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for detecting the state of a linear slide, characterized in that: The linear slide rail includes a slider and a slide rail. The slider includes a receiving groove for accommodating the slide rail. The slider further includes two opposite side surfaces in the receiving groove. The slide rail includes two opposite side surfaces. The two side surfaces of the slider correspond to the two side surfaces of the slide rail respectively. The device includes: at least one sensor, located at a position corresponding to the side surface of the slide rail and configured to detect vibration of the slide rail to generate a detection signal; as well as an analysis processor, communicatively connected to the at least one sensor, for determining the occurrence of an abnormality based on a level of the detection signal and at least a threshold, wherein the level of the detection signal is a peak value of a characteristic frequency of the detection signal; The at least one sensor is provided in two pieces, each of which is located on or adjacent to the two side surfaces of the slide rail. Detection signals generated by the two sensors when detecting vibration of the slide rail are defined as a first detection signal and a second detection signal, respectively. When a difference between a level of the first detection signal and a level of the second detection signal is greater than or equal to a first threshold, the analysis processor determines that an abnormality has occurred. When a difference between the level of the first detection signal and the level of the second detection signal is less than the first threshold, the analysis processor further compares a first characteristic number of the first detection signal with a second threshold, and compares a second characteristic number of the second detection signal with the second threshold. Furthermore, when both the first characteristic number and the second characteristic number are greater than or equal to the second threshold, the analysis processor compares the level of the first detection signal and the level of the second detection signal with a third threshold, respectively. When the levels of the first detection signal and the second detection signal are greater than or equal to the third threshold, the analysis processor determines that an abnormality has occurred. The first characteristic number is the number of characteristic frequencies of the first detection signal, and the second characteristic number is the number of characteristic frequencies of the second detection signal.

2. The device for detecting the state of a linear slide rail according to claim 1, wherein: When the first characteristic number or the second characteristic number is less than the second threshold, the analysis processor filters the first detection signal and the second detection signal respectively to generate a third detection signal and a fourth detection signal, and the analysis processor compares the third characteristic number of the third detection signal with the second threshold, and compares the fourth characteristic number of the fourth detection signal with the second threshold. When both the third characteristic number and the fourth characteristic number are greater than or equal to the second threshold, the analysis processor determines that an abnormality has occurred; The third characteristic number is the number of characteristic frequencies of the third detection signal, and the fourth characteristic number is the number of characteristic frequencies of the fourth detection signal.

3. A device for detecting the state of a linear slide, characterized in that: The linear slide rail includes a slider and a slide rail. The slider includes a receiving groove for accommodating the slide rail. The slider further includes two opposite side surfaces in the receiving groove. The slide rail includes two opposite side surfaces. The two side surfaces of the slider correspond to the two side surfaces of the slide rail respectively. The device includes: at least one sensor, located at a position corresponding to the side surface of the slide rail and configured to detect vibration of the slide rail to generate a detection signal; as well as an analysis processor, communicatively connected to the at least one sensor, for determining whether an abnormality has occurred based on the level of the detection signal and at least one threshold value; The level of the detection signal is a peak value of a characteristic frequency of the detection signal, the number of the at least one sensor is odd, and when the level of the detection signal is greater than or equal to a first threshold, the analysis processor determines that an abnormality has occurred; when the level of the detection signal is less than the first threshold, the analysis processor further compares a first characteristic number of the detection signal with a second threshold; when the first characteristic number is greater than or equal to the second threshold, the analysis processor compares the level of the detection signal with a third threshold; and when the level of the detection signal is greater than or equal to the third threshold, the analysis processor determines that an abnormality has occurred; When the first characteristic number is less than the second threshold, the analysis processor filters the detection signal to generate another detection signal, and the analysis processor compares the second characteristic number of the another detection signal with the second threshold. When the second characteristic number is greater than or equal to the second threshold, the analysis processor determines that an abnormality has occurred; The first characteristic number is the number of characteristic frequencies of the first detection signal, and the second characteristic number is the number of characteristic frequencies of the second detection signal.

4. A method for detecting the state of a linear slide, characterized in that: The linear slide rail includes a slider and a slide rail, the slider includes a receiving groove for accommodating the slide rail, the slider further includes two opposite side surfaces in the receiving groove, and the slide rail includes two opposite side surfaces, the two side surfaces of the slider respectively correspond to the two side surfaces of the slide rail, and the method includes the following steps: (A) detecting vibration of the slide rail via at least one sensor to generate a detection signal, wherein the sensor is located at an end of the slide rail and is located at or adjacent to the side surface of the slide rail; as well as (B) determining, by an analysis processor, that an abnormality has occurred based on the level of the detection signal and at least one threshold value; The level of the detection signal is the peak value of the characteristic frequency of the detection signal. The at least one sensor is provided in two portions, and the two sensors are respectively located on or adjacent to the two side surfaces of the slide rail. The detection signals generated by the two sensors when detecting the vibration of the slide rail are defined as a first detection signal and a second detection signal, respectively. Step (B) includes the following steps: (B1) determining whether a difference between a level of the first detection signal and a level of the second detection signal is greater than or equal to a first threshold; (B2) determining that an abnormality occurs when a difference between the level of the first detection signal and the level of the second detection signal is greater than or equal to the first threshold; (B3) when the difference between the first detection signal and the second detection signal is less than the first threshold, comparing, via the analysis processor, a first characteristic number of the first detection signal with a second threshold, and comparing a second characteristic number of the second detection signal with the second threshold; (B4) when both the first characteristic number and the second characteristic number are greater than or equal to the second threshold, comparing the level of the first detection signal with a third threshold and comparing the level of the second detection signal with the third threshold via the analysis processor; and (B5) when the level of the first detection signal or the second detection signal is greater than or equal to the third threshold, determining, via the analysis processor, that an abnormality has occurred; The first characteristic number is the number of characteristic frequencies of the first detection signal, and the second characteristic number is the number of characteristic frequencies of the second detection signal.

5. The method for detecting the state of a linear slide rail according to claim 4, wherein: The step (B) further comprises the following steps: (B6) when the first characteristic number or the second characteristic number is less than the second threshold, filtering the first detection signal and the second detection signal, respectively, via the analysis processor, to generate a third detection signal and a fourth detection signal, and comparing the third characteristic number of the third detection signal with the second threshold, and comparing the fourth characteristic number of the fourth detection signal with the second threshold, via the analysis processor; and (B7) when both the third characteristic number and the fourth characteristic number are greater than or equal to the second threshold value, the analysis processor determines that an abnormality has occurred; The third characteristic number is the number of characteristic frequencies of the third detection signal, and the fourth characteristic number is the number of characteristic frequencies of the fourth detection signal.

6. A method for detecting the state of a linear slide, characterized in that: The linear slide rail includes a slider and a slide rail, the slider includes a receiving groove for accommodating the slide rail, the slider further includes two opposite side surfaces in the receiving groove, and the slide rail includes two opposite side surfaces, the two side surfaces of the slider respectively correspond to the two side surfaces of the slide rail, and the method includes the following steps: (A) detecting vibration of the slide rail via at least one sensor to generate a detection signal, wherein the sensor is located at an end of the slide rail and is located at or adjacent to the side surface of the slide rail; as well as (B) determining, by an analysis processor, that an abnormality has occurred based on the level of the detection signal and at least one threshold value; The level of the detection signal is the peak value of the characteristic frequency of the detection signal, the number of the at least one sensor is odd, and the step (B) includes the following steps: (B1) determining whether the level of the detection signal is greater than or equal to a first threshold; (B2) determining that an abnormality occurs when the level of the detection signal is greater than or equal to the first threshold; (B3) when the level of the detection signal is less than the first threshold, comparing the first characteristic number of the detection signal with a second threshold; (B4) when the first characteristic number is greater than or equal to the second threshold, comparing the level of the detection signal with a third threshold; (B5) determining that an abnormality occurs when the level of the detection signal is greater than or equal to the third threshold; (B6) when the first characteristic number is less than the second threshold, filtering the detection signal to generate another detection signal; (B7) comparing the second characteristic number of the other detection signal with the second threshold; and (B8) when the second characteristic number is greater than or equal to the second threshold, determining that an abnormality has occurred; The first characteristic number is the number of characteristic frequencies of the first detection signal, and the second characteristic number is the number of characteristic frequencies of the second detection signal.

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