CN203704967U - Calibration device of absolute positioning sensor - Google Patents

Abstract

The utility model discloses a calibration device for an absolute positioning sensor, which comprises a processing unit, a frame and more than one slide block. A guide rail is arranged transversely on the frame, and the slide block is installed on the guide rail and is horizontally positioned on the guide rail. Sliding, the slider is provided with a chute, the chute is horizontal and vertical to the guide rail, a movement rod is pierced in the chute, and the bottom end of the movement rod is provided with a The positioning marker, the moving rod slides horizontally with the slider, the moving rod drives the positioning marker to slide horizontally along the direction of the chute, vertically lift and rotate, and the output voltage of the to-be-calibrated part is passed through the processing unit processed and displayed. The utility model has the advantages of simple structure, which can effectively simulate various conditions of the train body, perform off-board calibration, and reduce human intervention.

Description

A Calibration Device for Absolute Positioning Sensor

technical field

The utility model relates to the technical field of track train positioning sensors, in particular to a calibration device for absolute positioning sensors.

Background technique

The absolute positioning technology based on "inductive positioning" scans the passive positioning sign boards fixed along the track through the active code reader installed on the train to obtain the coding information on each positioning sign board, thereby obtaining the absolute position of the train. location information.

The positioning mark board is a plastic board with a certain thickness, the middle layer is coated with copper, and a coded slit indicating the position information is left according to certain rules. The copper-clad middle layer (also a shielding layer) on the positioning sign board is divided into 5 binary areas with the same height and 4 coded slits with the same size. The slits are 3mm wide, and each coded slit corresponds to a binary code. Relative to the geometric center of binary, the coding slit deviated to the left of the center is a binary "1", and the one deviated to the right of the center is a binary "0".

The absolute positioning sensor is an active code reader, which is generally installed on the train bogie. When the train is running, especially when it is cornering, there will be certain vibrations in the horizontal and vertical directions. The installation position cannot be completely accurate, so when the vehicle-mounted active code reader reads the positioning sign board, the positional relationship between them is different from the standard position.

Any kind of sensor must be calibrated through standard experiments before it is put into practical use. The existing absolute positioning sensor needs to be installed on the vehicle when it is calibrated, and the vehicle is run to the calibration position for calibration. If there is a calibration error, the sensor needs to be disassembled, the internal hardware data should be adjusted on the ground, and then re-installed for calibration. This calibration method of repeated disassembly and assembly is very cumbersome, and the reliability is not high due to manual errors caused by each installation. Moreover, the existing absolute positioning sensors are basically manually calibrated, which is subjective, and the human error is relatively large, which increases the unreliability of the absolute positioning sensor.

Utility model content

Aiming at the technical problems existing in the prior art, the utility model provides a calibration device of an absolute positioning sensor with simple structure, capable of simulating various conditions of a train car body, and performing de-train calibration.

In order to solve the problems of the technologies described above, the technical solution proposed by the utility model is:

A calibration device for an absolute positioning sensor, comprising a processing unit, a frame, and more than one slide block, a guide rail is arranged transversely on the frame, the slide block is installed on the guide rail and slides horizontally on the guide rail, the slide A chute is arranged on the block, and the direction of the chute is perpendicular to the direction of the arrangement of the guide rails. A movement rod is pierced in the chute, and a positioning position matching with the part to be calibrated is provided at the bottom end of the movement rod. Marking part, the moving rod slides laterally with the slider, the moving rod drives the positioning marking part to vertically lift, rotate and slide horizontally along the direction of the chute, and the output voltage of the part to be calibrated is processed by the processing unit processed and displayed.

As a further improvement of the above technical solution:

The part to be marked is provided with a groove, the opening of the groove is parallel to the arrangement direction of the guide rails, and the positioning marker moves in the opening of the groove.

The number of the sliders is three, and the three sliders are parallel to each other.

The positioning marking part is a positioning marking plate, and the positioning marking plate is parallel to the opening of the groove.

The moving rod is a screw, and the screw rests on the slider through a nut.

The nut is provided with a rotation angle score line.

The chute is provided with longitudinal scale lines.

Vertical scale lines are arranged on the vertical direction of the movement rod.

Compared with the prior art, the utility model has the advantages of:

1. The calibration device of the absolute positioning sensor of the utility model can drive the positioning marker to perform multi-dimensional movement on the absolute positioning sensor through the coordinated movement of the slider and the moving rod, effectively simulating various conditions of the train body, and performing separation Car calibration reduces human intervention and enhances the consistency of calibrated products.

2. The calibration device of the absolute positioning sensor of the utility model is provided with three parallel sliders, which can completely simulate the situation that the absolute positioning sensor passes through a set of (three consecutive) positioning marking plates, thereby improving the reliability of the calibration product sex.

3. The calibration device of the absolute positioning sensor of the present invention is small in size, compact in structure, light in weight, easy to carry and install, and has good redundancy.

Description of drawings

Fig. 1 is a structural schematic diagram of Embodiment 1 of the utility model.

Fig. 2 is a schematic diagram of the position of the positioning mark plate in the U-shaped groove of the present invention.

Fig. 3 is a schematic diagram of the second position of the positioning mark plate in the U-shaped groove of the present invention.

Fig. 4 is a schematic diagram of the position three of the positioning mark plate in the U-shaped groove of the present invention.

Fig. 5 is a schematic diagram of the position four of the positioning mark plate in the U-shaped groove of the present invention.

Fig. 6 is a schematic diagram of the position five of the positioning mark plate in the U-shaped groove of the present invention.

Fig. 7 is a schematic structural diagram of Embodiment 2 of the present utility model.

Explanation of symbols in the figure: 1. frame; 11. guide rail; 2. slider; 21. chute; 3. screw; 31. nut; 4. positioning mark plate; 5. U-shaped groove; 6. processing unit; 61. Emulator; 62, computer; 7, external power supply.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments of the description.

Embodiment one:

As shown in Figure 1, the calibration device of the absolute positioning sensor of the present embodiment includes a processing unit 6, a frame 1 and more than one slide block 2, a guide rail 11 is arranged laterally on the frame 1, and the slide block 2 is installed on the guide rail 11 and Sliding horizontally on the guide rail 11, the slide block 2 is provided with a chute 21, the direction of the chute 21 is horizontal and vertical to the direction in which the guide rail 11 is arranged, and a movement rod is pierced in the chute 21, and the bottom end of the movement rod is provided with a The positioning mark matched with the calibration part, the movement rod slides horizontally with the slider 2, and the movement rod drives the positioning mark to lift vertically, rotate and slide horizontally along the direction of the chute 21, and the output voltage of the part to be calibrated is processed by the processing unit 6 and display. The calibration device of the absolute positioning sensor of the utility model can drive the positioning markers to perform multi-dimensional movements in the absolute positioning sensor through the cooperation of the slider 2 and the movement rod, which can effectively simulate various conditions of the train body and carry out separation Car calibration reduces human intervention and enhances the consistency of calibrated products.

In this embodiment, a groove is provided on the part to be calibrated, and the groove is a U-shaped groove 5, the opening of the U-shaped groove 5 is parallel to the arrangement direction of the guide rail 11, and the positioning marker moves in the opening of the U-shaped groove 5.

In this embodiment, the positioning marking part is a positioning marking plate 4 , and the positioning marking plate 4 is parallel to the opening of the U-shaped groove 5 .

In this embodiment, the moving rod is a screw 3 , and the screw 3 rests on the slider 2 through a nut 31 .

In this embodiment, the nut 31 is provided with a rotation angle score line.

In this embodiment, longitudinal scale lines are arranged on the sliding groove 21 .

In this embodiment, a vertical scale line is provided on the vertical direction of the movement bar.

Calibration process: at the beginning, the external power supply 7 is used to provide power to the absolute positioning sensor to be calibrated. The distance between the lower surface of the positioning mark plate 4 and the bottom of the U-shaped groove 5 is about 30 mm. The distance between the lower surface and the bottom of the U-shaped groove 5 of the code reader is about 15mm. The horizontal distance between the sides of the U-shaped groove 5 (the plane of the transmitting coil and the plane of the receiving coil) is 66 mm, the thickness of the positioning mark plate 4 is 4 mm, and the standard calibration position is defined as: the two sides of the positioning mark plate 4 and the U-shaped groove 5 The sides are parallel, the distance between the lower surface of the marking plate and the bottom of the U-shaped groove 5 of the code reader is 15mm, and the positive and negative sides of the positioning mark plate 4 are respectively 31mm from the two sides of the U-shaped groove 5 of the code reader.

According to the measurement range of the absolute positioning sensor, the maximum distance between the lower surface of the positioning marker plate 4 and the bottom of the U-shaped groove 5 is 30 mm, as shown in Figure 2; the minimum distance between the lower surface of the positioning marker plate 4 and the bottom of the U-shaped groove 5 is 5 mm, as Figure 3 shows. At the same time, the maximum allowable offset displacement in the guiding direction is 10 mm. Considering that the installation positions of the positioning mark plate 4 and the U-shaped groove 5 are not accurate, the maximum allowable offset distance during calibration is set so that the positioning mark plate 4 is in the middle of the U-shaped groove 5 25mm to the left and 25mm to the right, the distance between the two sides of the positioning sign plate 4 and the two sides of the U-shaped groove 5 is 6mm, as shown in Figure 4 and Figure 5 . Finally, consider a limit condition that the positioning mark plate 4 is seriously deflected clockwise or counterclockwise in the horizontal direction, so that the positioning mark plate 4 just sticks to the two sides of the U-shaped groove 5 and enters the U-shaped groove 5, Since the length of the positioning mark plate 4 is about 260 mm, and the width of the U-shaped groove 5 is 66 mm, the rotation angle of the positioning mark plate 4 is 15° at this time. $(\mathrm{\θ}=\arcsin \left(\frac{66}{260}\right)),$ As shown in Figure 6.

Taking the code reading method based on large coil positioning and small coil code reading as an example, the calibration process is: first place the positioning mark plate 4 at the standard calibration position of the calibration device, slide the positioning mark plate 4 to the standard calibration position, and test the corresponding The input voltage of the internal signal voltage comparator of the absolute positioning sensor to be calibrated is used to adjust the reference voltage of the positioning coil inside the absolute positioning sensor to be calibrated; The input voltage of the signal voltage comparator at 1 o’clock is used to adjust the reference voltage of the code reading coil inside the absolute positioning sensor to be calibrated.

Set the reference voltages of the positioning coil and the code reading coil respectively according to the above steps, and then move the positioning mark plate 4 in the forward and reverse directions on the standard calibration position, and test the reliability of code reading under the conditions shown in Fig. 2 to Fig. 6 .

In this embodiment, the processing unit 6 includes an emulator 61 and a computer 62. The emulator 61 is connected to the absolute positioning sensor to be calibrated and transmits the data to the computer 62. The computer 62 displays the input voltage of the signal voltage comparator.

Embodiment two:

As shown in Figure 7, the only difference between this embodiment and Embodiment 1 is that three sliders 2 are installed on the guide rail 11 of the frame 1, and the three sliders 2 are parallel to each other, which can completely simulate the complete passage of an absolute positioning sensor. Group (three in a row) positioning mark plate 4, so as to improve the qualification of the calibration product. The rest of the parts that are not described are the same as those in Embodiment 1, and will not be repeated here.

The above are only preferred implementations of the utility model, and the scope of protection of the utility model is not limited to the above-mentioned embodiments, and all technical solutions under the thinking of the utility model all belong to the scope of protection of the utility model. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications without departing from the principle of the utility model should be regarded as the protection scope of the utility model.

Claims (8)

1. A calibration device for an absolute positioning sensor, characterized in that it includes a processing unit (6), a frame (1) and more than one slider (2), and a guide rail (11) is arranged laterally on the frame (1) , the slider (2) is installed on the guide rail (11) and slides horizontally on the guide rail (11), the slider (2) is provided with a chute (21), the chute (21) The direction of the guide rail (11) is perpendicular to the direction in which the guide rail (11) is arranged, and a movement rod is pierced in the chute (21), and the bottom end of the movement rod is provided with a positioning mark that matches the part to be calibrated. The movement rod slides horizontally with the slider (2), and the movement rod drives the positioning mark to vertically lift, rotate and slide horizontally along the direction of the chute (21), and the output voltage of the to-be-calibrated part passes through the processing unit (6) Process and display. 2. The calibration device of the absolute positioning sensor according to claim 1, characterized in that, the part to be calibrated is provided with a groove, the opening of the groove is parallel to the arrangement direction of the guide rail (11), and the positioning mark The member moves within the opening of the slot. 3. The calibration device for an absolute positioning sensor according to claim 1 or 2, characterized in that the number of the sliders (2) is three, and the three sliders (2) are parallel to each other. 4 . The calibration device for an absolute positioning sensor according to claim 2 , characterized in that, the positioning marking member is a positioning marking plate ( 4 ), and the positioning marking plate ( 4 ) is parallel to the opening of the groove. 5 . The calibration device for an absolute positioning sensor according to claim 3 , characterized in that the moving rod is a screw ( 3 ), and the screw ( 3 ) rests on the slider ( 2 ) through a nut ( 31 ). 6 . The calibration device for an absolute positioning sensor according to claim 5 , characterized in that, the nut ( 31 ) is provided with a rotation angle score line. 6 . 7 . The calibration device for an absolute positioning sensor according to claim 6 , characterized in that, the sliding groove ( 21 ) is provided with a longitudinal scale line. 7 . 8 . The calibration device for an absolute positioning sensor according to claim 7 , wherein a vertical scale line is arranged on the vertical direction of the moving rod. 9 .