Temperature early warning device of air floating guide rail

Abstract

The application discloses a temperature early warning device of an air floating guide rail, the air floating guide rail comprising a guide rail and an air floating block movable on the guide rail, an air floating surface being formed between the air floating block and the guide rail, the temperature early warning device comprising a photosensitive sensor arranged on the air floating block, a laser emitter and a laser receiver arranged at two ends of the air floating block, the laser emitter being upwardly inclined, the laser emitter emitting laser, the laser receiver receiving the laser when the temperature of the air floating surface is a working temperature, the laser being upwardly refracted when entering the air floating surface when the temperature of the air floating surface is increased, the photosensitive sensor receiving the laser, an alarm or an emergency stop being triggered when the photosensitive sensor receives the laser, the temperature early warning device of the air floating guide rail playing a role in early warning when the working temperature of the air floating surface is increased, thereby saving the site cost of a customer and prolonging the service life of the air floating guide rail in a poor working environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air floating guide rail, and particularly relates to a temperature early warning device of air floating guide rail. BACKGROUND

[0002] In the working process, the air floating guide rail needs to keep the room temperature constant, so as to keep the performance of the air floating guide rail stable. In normal cases, the working temperature of the air floating guide rail is 20 DEG C. However, with the continuous development of the air floating guide rail, the customer group using the air floating guide rail is increasing. Some customers cannot guarantee that the working environment temperature is always at the required temperature, or there are other devices around the air floating guide rail which generate heat sources, or the motor fails to generate a high temperature but still guarantees the working state. The generation of these heat sources will change the working temperature of the air floating surface of the air floating guide rail, and affect the use of the air floating guide rail. Therefore, a device is needed to give an early warning when the temperature rises. SUMMARY

[0003] The present application aims at the above-mentioned problems existing in the prior art, and provides a temperature early warning device of air floating guide rail.

[0004] To achieve the above-mentioned purpose, the following technical scheme can be used. A temperature early warning device of air floating guide rail, the air floating guide rail comprises a guide rail and an air floating block which can move on the guide rail, an air floating surface is formed between the air floating block and the guide rail, the temperature early warning device comprises a photosensitive sensor arranged on the air floating block, a laser emitter and a laser receiver arranged at two ends of the air floating block, and the laser emitter is arranged upwardly inclined. The laser emitter emits laser, and the laser receiver receives the laser when the temperature of the air floating surface is the working temperature. When the temperature of the air floating surface rises, the laser entering the air floating surface will produce upward refraction, and the photosensitive sensor receives the laser. When the photosensitive sensor receives the laser, an alarm or an emergency stop is triggered.

[0005] Further, the angle of the laser emitter is 0 DEG to arctan (h1+h0-h2-h4) / h3 DEG.

[0006] Further, an air floating groove is arranged on the air floating block, the extension direction of the air floating groove is the same as the moving direction of the air floating block, and the photosensitive sensor is arranged in the air floating groove.

[0007] Further, the photosensitive sensor is arranged at least in one, and the photosensitive sensor is arranged on the light path of the laser.

[0008] Further, the photosensitive sensors are symmetrically arranged on the air floating block.

[0009] Further, the plurality of photosensitive sensors are arranged in parallel along the extension direction of the laser, and each of the photosensitive sensors is perpendicular to the extension direction of the laser.

[0010] Further, the laser transmitter and the laser receiver are each provided with at least one.

[0011] Further, the laser transmitter is provided with a laser stabilizer for stabilizing the direction of the laser.

[0012] Further, the guide rail is provided with a limiting block at each end, the laser transmitter is arranged on one limiting block, and the laser receiver is arranged on the other limiting block.

[0013] Further, at the working temperature, the laser emitted by the laser transmitter passes through the air floating groove.

[0014] The temperature early warning device of the air floating guide rail can achieve the following technical effects: when a heat source is generated around the air floating guide rail and has a great influence on the working temperature of the air floating surface of the air floating guide rail, the laser is received by the photosensitive sensor to trigger an alarm or an emergency stop, thereby protecting the equipment, and in the case that the working environment of the customer site is poor, the air floating guide rail can be normally worked without causing damage to the air floating guide rail as much as possible, thereby saving the site cost of the customer and prolonging the service life of the air floating guide rail in the poor working environment. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of the three-dimensional structure of the present application Figure 1 ;

[0016] Figure 2 is an enlarged view of position A in the present application Figure 1 .

[0017] Figure 3 is a schematic diagram of the three-dimensional structure of the present application Figure 2 ;

[0018] Figure 4 is an enlarged view of position B in the present application Figure 3 .

[0019] Figure 5 is a schematic diagram of the three-dimensional structure of the air floating block of the present application

[0020] In the figure: 11, marble plate; 12, guide rail; 13, air floating block; 131, air floating groove; 14, limiting block

[0021] 21, laser transmitter; 22, laser receiver; 23, laser stabilizer; 24, photosensitive sensor DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application. The embodiments of the present application will be described in detail below with reference to the drawings.

[0024] As shown in Figure 1 , Figures 3-5 , the air floating guide rail comprises a marble plate 11, a guide rail 12 arranged on the marble plate 11, and an air floating block 13 movable on the guide rail 12, wherein an air floating groove 131 is arranged on the air floating block 13, and the air floating groove 131 is arranged as needed, and the extension direction of each air floating groove 131 is the same as the moving direction of the air floating block 13. When the air floating guide rail is working, air will be blown to the air floating block 13 to generate an air film, and an air floating surface will also be formed between the air floating block 13 and the guide rail 12.

[0025] In some cases, the temperature of the linear motor may rise, but it can still work, which usually depends on the heat capacity of the motor design, the heat dissipation system, and the temperature limit of the working environment, etc. In some small size air floating guide rails, if the linear motor works abnormally with too high temperature rise, it may cause the air floating guide rail to work unstably. In the case of poor factory environment, there may be equipment around the air floating guide rail that generates a large amount of heat, which may also cause the ambient temperature of the air floating guide rail to rise, especially the temperature of the air floating surface, thereby causing the air floating guide rail to work unstably, so it is necessary to give a warning on the temperature around the air floating guide rail.

[0026] With the temperature rising, the metal material will produce expansion, in order to prevent the air floating block 13 and the guide rail 12 directly contact, the air film thickness needs to increase, so as to make the working state unstable, because the force balance changes, has certain influence to the stability of the air floating guide rail, therefore needs to carry out the temperature early warning of the air floating guide rail, in order to prevent the air floating guide rail from causing the shaking of the air floating guide rail or causing the overturning of the air floating guide rail upper equipment.

[0027] A temperature early warning device of an air floating guide rail, as shown by the figure, Figures 1-5 It comprises a photosensitive sensor 24 arranged on the air floating block 13, a laser emitter 21 and a laser receiver 22 arranged at both ends of the air floating block 13, the laser emitter 21 and the laser receiver 22 are arranged on the guide rail 12, the laser emitter 21 is arranged at one end of the guide rail 12, and the laser receiver 22 is arranged at the other end of the guide rail 12, the arrangement of the laser emitter 21 and the laser receiver 22 needs to ensure that the laser receiver 22 can receive the laser emitted by the laser emitter 21 at the working temperature.

[0028] The laser emitter 21 emits laser, when the temperature of the air floating surface is the working temperature, the laser receiver 22 receives the laser, because the temperature early warning device mainly detects the temperature of the air floating surface to judge the environmental temperature, therefore, at the working temperature, the laser passes through the air floating groove 131 and is received by the laser receiver 22, the laser can also be arranged to pass through other positions of the air floating surface without passing through the air floating groove 131, but the air film thickness of each air floating guide rail is inconsistent, and the air film thickness that is too small will cause the laser receiver 22 to not receive the laser even at the working temperature, therefore, it is best to be arranged at the air floating groove 131.

[0029] The laser emitter 21 emits laser, when the temperature of the air floating surface is the working temperature, the laser receiver 22 receives the laser, because the temperature early warning device mainly detects the temperature of the air floating surface to judge the environmental temperature, therefore, at the working temperature, the laser passes through the air floating groove 131 and is received by the laser receiver 22, the laser can also be arranged to pass through other positions of the air floating surface without passing through the air floating groove 131, but the air film thickness of each air floating guide rail is inconsistent, and the air film thickness that is too small will cause the laser receiver 22 to not receive the laser even at the working temperature, therefore, it is best to be arranged at the air floating groove 131.

[0030] The air refractive index is a physical quantity related to factors such as temperature, pressure and air composition. Generally speaking, with the increase of temperature, the refractive index of air decreases. Specifically, the refractive index n can be described by the following Cauchy refractive index formula:

[0031] n=A+B / T+CT+DT 2

[0032] A, B, C, D are constants related to the properties of air. T is the absolute temperature, in Kelvin (K). This formula expresses the relationship between the refractive index of air and temperature. Generally, as temperature increases, the refractive index n decreases, resulting in an increase in the speed of light propagation.

[0033] When a beam of light is shone towards a mass of high-temperature air, the refractive index of the high-temperature air is relatively small due to its generally lower density. According to Snell's Law, when light passes from one medium to another, it will refract according to the refractive indices of the two media.

[0034] The mathematical expression of Snell's Law is:

[0035] n1 sin θ1 = n2 sin θ2

[0036] where n1 and n2 are the refractive indices of the two media, and θ1 and θ2 are the angles of incidence and refraction, respectively.

[0037] In this case, the light will refract upwards due to the smaller refractive index of the high-temperature air. Specifically, the angle of incidence θ1 is relative to the horizontal direction, while the angle of refraction θ2 is relative to the vertical direction.

[0038] Therefore, the light will refract towards the direction perpendicular to the mass of high-temperature air. This refractive direction is caused by the temperature gradient, with the high-temperature air generally located at a lower altitude and the cold air above. In this case, the heat source is mainly considered to be the abnormal operation of the motor, and the motors of linear and rotary table products are mostly installed at the lower part of the air floating surface. If there is a risk of overheating during abnormal operation, the temperature will be from bottom to top. When the motor overheats, the temperature is transmitted from bottom to top. When the temperature difference occurs, the temperature in the air floating groove remains the same when the temperature of the air floating surface changes. This situation causes the light to refract upwards, forming a visual refraction phenomenon. Therefore, the photosensitive sensor 24 is arranged on the air floating block 13. Since the temperature warning device mainly detects the temperature of the air floating surface, the photosensitive sensor 24 is arranged on the side close to the air floating surface.

[0039] To ensure that the photosensitive sensor 24 arranged on the air floating block 13 can detect the laser when the temperature rises, i.e., when the warning temperature is reached, the laser emitter 21 is arranged upwardly inclined. The angle of inclination of the laser emitter 21 is 0° to arctan(h1+h0-h2-h4) / h3°. h0 is the thickness of the air film, h1 is the depth of the air floating groove 131, h2 is the vertical height from the emitting end of the laser to the guide rail 12, h3 is the distance between the laser receiver 22 and the laser emitter 21, and h4 is the thickness of the photosensitive sensor 24.

[0040] The warning principle of the temperature warning device is that the upwardly inclined laser is shot into the air floating surface from the environment, and after the laser enters the air floating surface, the laser will be refracted upwardly due to the low temperature of the upper layer and the high temperature of the lower layer of the air floating surface, the current temperature is judged according to the position of the laser received by the photosensitive sensor 24, so as to trigger the alarm or emergency stop.

[0041] There are two setting modes of the photosensitive sensor 24, the first setting mode is that:

[0042] The photosensitive sensor 24 is arranged in the air floating groove 131, and the photosensitive sensor 24 is arranged along the extension direction of the air floating groove 131. The photosensitive sensor 24 is arranged in at least one, and when the photosensitive sensor 24 is arranged in two or more, one of the photosensitive sensors 24 must be arranged on the light path of the laser to ensure the reception of the laser. The mass of the photosensitive sensor 24 is small, and the influence on the balance of the air floating block 13 is also small, but in order to better ensure the balance of the air floating block 13, when the air floating block 13 is arranged in one, the photosensitive sensor 24 is arranged in the middle of the air floating block 13, and when the air floating block 13 is arranged in two or more, in the odd case, one of the photosensitive sensors 24 is arranged in the middle of the air floating block 13, and the remaining ones are symmetrically arranged on the air floating block 13, and in the even case, the photosensitive sensors 24 are symmetrically arranged on the air floating block 13. Because the laser will pass through the air floating groove 131 at the working temperature, the photosensitive sensor 24 is arranged in the air floating groove 131 to ensure the reception of the laser. Of course, the photosensitive sensor 24 can also not be arranged in the air floating groove 131, and the light path of the laser also needs to be adjusted appropriately.

[0043] When the photosensitive sensor 24 is arranged along the extension direction of the air floating groove 131, the corresponding positions of the photosensitive sensor 24 in the extension direction are arranged, and the photosensitive sensor 24 is arranged to warn when receiving the laser and to stop urgently when receiving the laser. The specific positions are set according to different working conditions and requirements.

[0044] The first setting mode is adopted in the scheme, that is, the photosensitive sensor 24 is arranged in the air floating groove 131, and the photosensitive sensor 24 is arranged along the extension direction of the air floating groove 131.

[0045] The second setting mode is that:

[0046] The photosensitive sensors 24 are not arranged in the air floating groove 131, and a plurality of photosensitive sensors 24 are arranged in parallel along the extension direction of the laser, each photosensitive sensor 24 represents a different temperature or temperature range, and the corresponding photosensitive sensor 24 is arranged to trigger an alarm when the photosensitive sensor 24 receives the laser, and trigger an emergency stop when the photosensitive sensor 24 receives the laser, and the specific arrangement position is arranged according to different working conditions and requirements.

[0047] In the second arrangement mode, at the working temperature, the laser passes through the air floating surface, at this time, it is necessary to ensure that the air film thickness is large, so as to ensure that the laser can be received by the laser receiver 22.

[0048] The laser emitter 21 and the laser receiver 22 are at least arranged one, in order to better ensure the accuracy of temperature detection, the laser emitter 21 and the laser receiver 22 can be arranged multiple, but if the laser emitter 21 and the laser receiver 22 have laser detection function, only one set can be arranged, in the present scheme, the laser emitter 21 and the laser receiver 22 are arranged one set.

[0049] In order to ensure the stability of the laser beam, the laser stabilizer 23 is arranged on the laser emitter 21, the laser stabilizer 23 detects and adjusts the laser output through an external feedback control system, so as to ensure the horizontality of the laser beam.

[0050] In order to prevent the air floating guide rail from malfunctioning due to temperature rise or other reasons, the air floating block 13 is separated from the guide rail 12, and the limit block 14 is arranged at both ends of the guide rail 12, the laser emitter 21 is arranged on one limit block 14, and the laser receiver 22 is arranged on the other limit block 14.

[0051] The working temperature is the most suitable working temperature of the air floating guide rail, that is, the air floating thickness is at the temperature of the best working condition, generally 20℃. When the room temperature exceeds the working temperature, it is the pre-warning temperature, at the pre-warning temperature, the working performance of the air floating guide rail is not high, the air film thickness is not in the best working condition, at this time, the alarm is triggered or the air floating guide rail stops working.

[0052] The specific operation method of the temperature warning device of the air floating guide rail is as follows:

[0053] The basic working parameters of the air floating guide rail are acquired, and the temperature detection and the angle adjustment of the laser emitter 21 are provided with reference, then the temperature early warning device is started, the laser stabilizer 23 is adjusted, the laser angle emitted by the laser emitter 21 is kept unchanged under the action of the laser stabilizer 23, and the stability of the laser emitter 21 is ensured; then the photosensitive sensor 24 is calibrated, the photosensitive sensor 24 is accurately positioned in the air floating groove 131 of the air floating guide rail, and it is ensured that the photosensitive sensor 24 can accurately receive the laser refraction light to monitor the temperature; finally, the laser state is monitored in real time, when the photosensitive sensor 24 receives the laser, it is explained that the temperature exceeds the set threshold, that is, exceeds the working temperature, the alarm is triggered, if the temperature continues to rise, the emergency stop is triggered, and the equipment is stopped.

[0054] The temperature early warning device of the air floating guide rail can realize the following technical effects: the laser emitter 21 and the laser receiver 22 are arranged to determine whether the temperature of the air floating surface is within the working temperature; the photosensitive sensor 24 is arranged in the air floating groove 131, when the temperature of the air floating surface rises, the laser emitted by the laser emitter 21 is refracted upward, the position of the laser detected by the photosensitive sensor 24 is determined to trigger the alarm or the emergency stop; the laser stabilizer 23 is arranged to ensure the stability of the laser emitted by the laser emitter 21.

[0055] The preferred embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the specific details in the above-described embodiments, and various simple modifications can be made to the technical solutions of the present application within the technical concept of the present application, and these simple modifications all belong to the protection scope of the present application.

[0056] In addition, it should be noted that various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, various possible combinations are not described again in the present application.

[0057] In addition, various different embodiments of the present application can also be combined in any appropriate manner, as long as they do not deviate from the technical concept of the present application, and they should be considered as disclosed in the present application.

Claims

1. A temperature early warning device for an air floating guide rail, the air floating guide rail comprising a guide rail (12) and an air floating block (13) movable on the guide rail (12), and an air floating surface being formed between the air floating block (13) and the guide rail (12); the temperature early warning device comprising a photosensitive sensor (24) arranged on the air floating block (13), a laser emitter (21) and a laser receiver (22) arranged at two ends of the air floating block (13), the laser emitter (21) being arranged in an upward inclination; the laser emitter (21) emits laser light, when the temperature of the air floating surface is a working temperature, the laser receiver (22) receives the laser light; when the temperature of the air floating surface rises, the laser light is refracted upward when entering the air floating surface, the photosensitive sensor (24) receives the laser light, when the photosensitive sensor (24) receives the laser light, an alarm or an emergency stop is triggered. characterized in that The inclination angle of the laser emitter (21) is 0°-arctan(h1+h0-h2-h4) / h3°. h0 is the thickness of the air film, h1 is the depth of the air floating groove (131), h2 is the vertical height of the emitting end of the laser light from the guide rail (12), h3 is the distance between the laser receiver (22) and the laser emitter (21), and h4 is the thickness of the photosensitive sensor (24).

2. The temperature warning device for air floating guide rails according to claim 1, characterized in that: The air floating groove (131) is arranged on the air floating block (13), the extending direction of the air floating groove (131) is the same as the moving direction of the air floating block (13), and the photosensitive sensor (24) is arranged in the air floating groove (131). The photosensitive sensor (24) is arranged on the light path of the laser light.

3. The temperature warning device for air floating guide rails according to claim 2, characterized in that: When one photosensitive sensor (24) is arranged, the photosensitive sensor (24) is arranged in the middle of the air floating block (13); when two or more photosensitive sensors (24) are arranged, in the odd number case, one photosensitive sensor (24) is arranged in the middle of the air floating block (13), and the remaining photosensitive sensors (24) are symmetrically arranged on the air floating block (13); in the even number case, the photosensitive sensors (24) are symmetrically arranged on the air floating block (13).

4. The temperature warning device for air floating guide rails according to claim 3, characterized in that: A plurality of photosensitive sensors (24) are arranged in parallel along the extending direction of the laser light.

5. The temperature warning device for air floating guide rails according to claim 4, characterized in that: The laser emitter (21) and the laser receiver (22) are each arranged at least one.

6. The temperature warning device for air floating guide rails according to claim 1, characterized in that: A laser stabilizer (23) for stabilizing the direction of the laser light is arranged on the laser emitter (21).

7. The temperature warning device for air floating guide rails according to claim 1, characterized in that: Limiting blocks (14) for preventing the air floating block (13) from derailing are arranged at two ends of the guide rail (12).

8. The temperature warning device for air floating guide rails according to claim 1, characterized in that: The laser emitter (21) is arranged on one limiting block (14), and the laser receiver (22) is arranged on the other limiting block (14).

9. The temperature warning device for air floating guide rails according to claim 1, characterized in that: ​ 10. The temperature warning device for air floating guide rails according to claim 9, characterized in that: ​

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