Contact type displacement sensor system

Abstract

The invention provides a contact type displacement sensor system, and relates to the sensor field, the system comprises a signal processing chip, a grating code disc, a first chip, a second chip, a third chip and a power supply, the signal processing chip comprises a light source and a photosensitive element, the grating code disc comprises an absolute value type code channel and an increment type code channel, and the first chip, the second chip, the third chip and the power supply are electrically connected. The absolute value type code channel and the increment type code channel are engraved on the grating code disc, the light source emits light rays, the light rays are reflected by the grating code disc, the reflected light rays are processed by the signal processing chip to form digital signals, the signal processing chip is connected with the third chip, the signal processing chip outputs increment signals through the third chip, and the third chip is connected with the absolute value type code channel and the increment type code channel. The first chip is used for reading data in the signal processing chip, the first chip outputs an absolute value signal through the second chip, the internal structure is simplified, the signal output type is expanded, and the signal transmission distance is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of sensors, and in particular to a contact displacement sensor system. Background Art

[0002] As an important part of information technology, sensor technology has experienced a development process from simple to complex, from single to multiple. With the advancement of science and technology, sensors are gradually developing towards miniaturization, integration, intelligence and multi-functionality. Grating displacement sensors, as a type of sensor technology, are also constantly improved and perfected in this process. Existing grating displacement sensors mostly adopt a transmission method, that is, the light emitting element emits light, which passes through the grating code disk and is received by the photosensitive element, converted into an electrical signal, and output after digital processing. Its interior is mainly composed of a grating code disk, a mechanical displacement structure, a light emitting element, a photosensitive element and a signal processing circuit, wherein the photosensitive element and the light emitting element are located on both sides of the grating code disk, the structural composition is relatively complex, and the signal transmission distance is short, and the signal type is single. Therefore, it has become an urgent problem to propose a new type of sensor to solve the above problems. Summary of the invention

[0003] In view of the above technical problems, the technical solution adopted by the present invention is: a contact displacement sensor system, the system comprising: A signal processing chip, a grating code disk, a first chip, a second chip, a third chip and a power supply, wherein the signal processing chip includes a light source and a photosensitive element, the grating code disk includes an absolute value code track and an incremental code track, and the absolute value code track and the incremental code track are engraved on the grating code disk.

[0004] The present invention has at least the following beneficial effects: a contact displacement sensor system, the system comprising: a signal processing chip, a grating code disk, a first chip, a second chip, a third chip and a power supply, wherein the signal processing chip comprises a light source and a photosensitive element, the grating code disk comprises an absolute value code track and an incremental code track, the absolute value code track and the incremental code track are engraved on the grating code disk, the light source in the signal processing chip emits light, which is reflected by the grating code disk, and the reflected light is processed by the signal processing chip to form a digital signal, the signal processing chip is connected to the third chip, wherein the signal processing chip outputs an incremental signal through the third chip, the first chip is used to read data in the signal processing chip, wherein the first chip outputs an absolute value signal through the second chip, the present invention simplifies the internal structure, expands the types of signal output, and extends the transmission distance of the signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0006] Figure 1 A schematic diagram of a contact displacement sensor system provided by an embodiment of the present invention.

[0007] Figure numerals: 1-signal processing chip; 2-grating code disk; 3-first chip; 4-second chip; 5-third chip; 6-power supply; 11-light source; 12-photosensitive element. DETAILED DESCRIPTION

[0008] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0009] The present invention provides a contact displacement sensor system, such as Figure 1 As shown, the system includes a signal processing chip 1, a grating code disk 2, a first chip 3, a second chip 4, a third chip 5 and a power supply 6.

[0010] Specifically, the signal processing chip 1 includes a light source 11 and a photosensitive element 12, wherein the light source 11 is red light or blue light.

[0011] Furthermore, the light source 11 and the photosensitive element 12 are located on the same side of the grating code disk 2 .

[0012] Specifically, the grating code disk 2 is dynamic, wherein the movement direction of the grating code disk 2 is parallel to the straight line where the signal processing chip 1 is located, wherein different digital signals can be output through the movement of the grating code disk.

[0013] Specifically, the grating code disk 2 includes an absolute value code track and an incremental code track.

[0014] Furthermore, the absolute value code track and the incremental code track are engraved on the grating code disk 2.

[0015] Furthermore, those skilled in the art know that the lengths corresponding to the absolute value code channel and the incremental code channel can be selected according to actual needs, which all fall within the protection scope of the present invention and will not be described in detail here.

[0016] Specifically, the first chip 3 is an MCU chip.

[0017] Specifically, the second chip 4 is an RS-485 driver chip.

[0018] Specifically, the third chip 5 is a line driver chip.

[0019] Specifically, the light source 11 in the signal processing chip 1 emits light, which is reflected by the grating code disk 2, and the reflected light is processed by the signal processing chip 1 to form a digital signal.

[0020] Furthermore, the method for forming the digital signal is to receive the light emitted by the light source 11 through the photosensitive element in the signal processing chip 1 to form a differential sine and cosine signal, which is then amplified and subdivided by the signal processing chip 1 to be converted into a digital signal.

[0021] Specifically, the digital signal output includes incremental output and absolute value output.

[0022] Specifically, those skilled in the art know that the manner of outputting the digital signal can be selected according to actual needs, all of which fall within the protection scope of the present invention and will not be described in detail here.

[0023] Specifically, the power supply 6 supplies power to the signal processing chip 1 , the first chip 3 , the second chip 4 and the third chip 5 .

[0024] Furthermore, the input of the power supply 6 is 5 to 30 VDC.

[0025] Specifically, the signal processing chip 1 is used to output an incremental signal.

[0026] Furthermore, the signal processing chip 1 is connected to the third chip 5 .

[0027] Furthermore, the signal processing chip 1 outputs an incremental signal through the third chip 5 .

[0028] Specifically, the first chip 3 is used to read data in the signal processing chip 1 .

[0029] Furthermore, the first chip 3 outputs an absolute value signal through the second chip 4 .

[0030] From the above, it can be seen that this embodiment simplifies the internal structure by setting the structure of the signal processing chip, expands the types of signal output by setting different chips, and extends the signal transmission distance.

[0031] A contact displacement sensor system is provided in this embodiment, and the system includes: a signal processing chip, a grating code disk, a first chip, a second chip, a third chip and a power supply, wherein the signal processing chip includes a light source and a photosensitive element, the grating code disk includes an absolute value code track and an incremental code track, and the absolute value code track and the incremental code track are engraved on the grating code disk, the light source in the signal processing chip emits light, which is reflected by the grating code disk, and the reflected light is processed by the signal processing chip to form a digital signal, the signal processing chip is connected to the third chip, wherein the signal processing chip outputs an incremental signal through the third chip, and the first chip is used to read data in the signal processing chip, wherein the first chip outputs an absolute value signal through the second chip, simplifies the internal structure, expands the type of signal output, and extends the signal transmission distance.

[0032] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will also be appreciated by those skilled in the art that various modifications may be made to the embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A contact displacement sensor system, characterized in that: The system comprises a signal processing chip (1), a grating code disk (2), a first chip (3), a second chip (4), a third chip (5) and a power supply (6), wherein the signal processing chip (1) comprises a light source (11) and a photosensitive element (12), the grating code disk (2) comprises an absolute value code track and an incremental code track, the absolute value code track and the incremental code track are engraved on the grating code disk (2), the light source (11) and the photosensitive element (12) are located on the same side of the grating code disk (2), the light source (11) in the signal processing chip (1) emits light, which is reflected by the grating code disk (2), and the reflected light is processed by the signal processing chip (1) to form a digital signal, the signal processing chip (1) is connected to the third chip (5), wherein the signal processing chip (1) outputs an incremental signal through the third chip (5), the first chip (3) is used to read data in the signal processing chip (1), and wherein the first chip (3) outputs an absolute value signal through the second chip (4).

2. The contact displacement sensor system according to claim 1, characterized in that: The light source (11) is red light or blue light.

3. The contact displacement sensor system according to claim 1, characterized in that: The grating code disk (2) is dynamic, wherein the movement direction of the grating code disk (2) is parallel to the straight line where the signal processing chip (1) is located.

4. The contact displacement sensor system according to claim 1, characterized in that: The first chip (3) is an MCU chip.

5. The contact displacement sensor system according to claim 1, characterized in that: The second chip (4) is an RS-485 driver chip.

6. The contact displacement sensor system according to claim 1, characterized in that: The third chip (5) is a line driver chip.

7. The contact displacement sensor system according to claim 1, characterized in that: The power supply (6) supplies power to the signal processing chip (1), the first chip (3), the second chip (4) and the third chip (5).

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