CN111766825A

CN111766825A - SSI signal displacement sensor detection device and encoder detection device

Info

Publication number: CN111766825A
Application number: CN202010744454.5A
Authority: CN
Inventors: 耿春龙
Original assignee: Unixane Tangshan Instrument Co ltd
Current assignee: Unixane Tangshan Instrument Co ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2020-10-13

Abstract

The invention provides an SSI signal displacement sensor detection device and an encoder detection device, and belongs to the technical field of detection instruments. The displacement sensor detection comprises a microcontroller, a watchdog module, an SSI interface, an SSI module and a display module, wherein the watchdog module is connected with the microcontroller; the SSI module is used for receiving real-time SSI format data sent by the displacement sensor and converting the real-time SSI format data into TTL format data to be transmitted to the microcontroller; the microcontroller receives data sent by the SSI module and sends the data to the display module; the display module receives the data sent by the microcontroller and displays the data in a curve or digital form. The encoder detection device adopts a technology similar to that of a displacement sensor detection device to realize the detection of the encoder angle. The detection device has two display modes of numbers and curves on the liquid crystal screen, can detect the quality of the encoder or the displacement sensor at any place on site, and is convenient and fast.

Description

SSI signal displacement sensor detection device and encoder detection device

Technical Field

The invention belongs to the technical field of detection instruments, and particularly relates to an SSI signal displacement sensor detection device and an encoder detection device.

Background

The conventional method for detecting the quality of the displacement sensor at present is to connect the displacement sensor, a PLC (programmable logic controller) and a notebook computer to form a system, and program is written on the notebook computer, so that whether the sensor works normally can be seen on the notebook computer program when the displacement sensor is moved, and the method only has data display and no curve display and is not visual enough; moreover, the device can not be carried to the site for detection, and only the displacement sensor can be taken to a duty room for detection, so that the use is very inconvenient.

At present, tools special for detecting the quality of the encoder are few in the market, and great inconvenience is brought to equipment maintenance.

Disclosure of Invention

The invention provides an SSI signal displacement sensor detection device and an encoder detection device, and aims to solve the technical problem that the detection and maintenance of equipment are inconvenient because few detection devices and encoder detection devices specially used for detecting SSI signals are available in the market at present.

In order to achieve the purpose, the technical solution of the invention is as follows:

the utility model provides a SSI signal displacement sensor detection device, includes microcontroller, watchdog module, interface module, SSI module and display module, wherein:

the watchdog module is connected with the microcontroller and controls a reset pin of the microcontroller;

the interface module comprises an SSI interface, one end of the SSI interface is connected with the SSI signal displacement sensor through the adapter box, and the other end of the SSI interface is connected with the SSI module;

the SSI module is used for receiving real-time SSI format data sent by the SSI signal displacement sensor, converting the real-time SSI format data into TTL format data and transmitting the TTL format data to the microcontroller;

the microcontroller receives TTL format data sent by the SSI module and sends a data signal to the display module;

the display module receives the data sent by the microcontroller and displays the data in a curve or digital form.

Preferably, the circuit of the detection device adopts an LC filter circuit, and the LC filter circuit is connected with the microcontroller to provide a stable power supply for the microcontroller.

Preferably, the system further comprises a charging management module, wherein the charging management module is connected with the storage battery and is used for managing charging and controlling of the storage battery by the charger and calculating the electric quantity.

An encoder detection device, includes microcontroller, watchdog module, interface module, SSI module and display module, wherein:

the interface module comprises an SSI (Small Scale integration) interface and a parallel data interface, one end of the interface module is connected with the SSI encoder or the parallel encoder, and the other end of the interface module is connected with the SSI interface and the parallel data interface of the detection instrument through the aviation plug;

the SSI module is used for receiving the real-time SSI format data sent by the encoder, converting the real-time SSI format data into TTL format data and transmitting the TTL format data to the microcontroller;

and the display module receives the data sent by the microcontroller and displays the data in a curve form.

The invention has the beneficial effects that:

1. the displacement sensor detection device can set corresponding parameters according to sensor requirements to read data of the displacement sensor, displays the data on a display screen in a curved mode, has two display modes of numbers and curves, can analyze the quality of the sensor visually and accurately, mainly sets parameters including measuring range, format type, digit and precision, can be used for detecting the quality of the displacement sensor in any place, and is convenient and practical.

2. The displacement sensor detection device is SSI according to the communication mode, a microcontroller of the detection device controls an SSI module to read the displacement of the displacement sensor, the microcontroller displays the current displacement on the liquid crystal screen, and the position value of a period of time is displayed on the liquid crystal screen in a curve mode to serve as a basis for a user to judge whether the displacement sensor is good or not.

3. The encoder detection device can detect the quality of the encoder only by connecting the encoder with the encoder detection device, and the liquid crystal screen is provided with two display modes of numbers and curves, so that the encoder detection device is visual and accurate; and can be taken to any place on the spot to detect the quality of the on-spot encoder, and is very convenient and fast.

Drawings

Fig. 1 is a schematic block configuration diagram of embodiment 1.

Fig. 2 is a schematic view of a display interface of embodiment 1.

FIG. 3 is a schematic diagram of signal source detection display in embodiment 1.

FIG. 4 is a schematic view of a display interface in embodiment 2.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Example 1

Referring to fig. 1, an SSI signal displacement sensor detection device includes a microcontroller, a watchdog module, an interface module, an SSI module, and a display module, wherein: the watchdog module is connected with the microcontroller and controls a reset pin of the microcontroller; the interface module comprises an SSI (Small scale integration) interface, the SSI interface outputs 24v voltage, one end of the interface module is connected with the SSI signal displacement sensor through the adapter box, and the other end of the interface module is connected with the SSI module; the SSI module is used for receiving real-time SSI format data sent by the SSI signal displacement sensor, converting the real-time SSI format data into TTL format data and transmitting the TTL format data to the microcontroller; the microcontroller receives TTL format data sent by the SSI module and sends a data signal to the display module; the display module receives the data sent by the microcontroller and displays the data in a curve or digital form. Preferably, the circuit of the detection device adopts an LC filter circuit, and the LC filter circuit is connected with the microcontroller to provide a stable power supply for the microcontroller. Preferably, the system further comprises a charging management module, wherein the charging management module is connected with the storage battery and is used for managing charging and controlling of the storage battery by the charger and calculating the electric quantity.

In addition, the detection device is also provided with a parameter setting key, wherein the parameter setting key comprises a switch key, a range, a format type, a digit number, a precision key and the like, and the range key is clicked to display the circular switching of the ordinate range from 25mm to 450 mm; clicking the format type key to switch between binary and Gray codes; the click digit key is circularly switched from 24 bits to 26 bits; the click precision key precision is circularly switched from 2um to 10 um. The parameter setting key also comprises a mute switch and a backlight switch.

The SSI signal displacement sensor detection device adopts various anti-interference technologies in the whole machine design: 1. the watchdog module can ensure that the system is reset in time when encountering interference, the watchdog module adopts a watchdog chip MAX823 to control the reset foot of the microcontroller, if the MCU resets the timer of the MAX823 at irregular time, the MAX823 controls the reset foot of the MCU to reset the MCU; when the program normally runs, the MCU clears the timer of the MAX823 in a timing 1S mode, when the program is out of control, the MCU cannot clear the timer of the MAX823, and the MCU is reset. 2. The circuit adopts LC filter circuit, protects MCU's steady operation (MCU's working power VCC, is that battery powered VBAT steps down through LDO, adopts LC filtering among the power supply circuit, has reduced sharp pulse interference voltage among the working power to MCU's interference, avoids MCU to reset because of power sharp pulse interference). 3. The program of the microcontroller adopts CRC (common check code with error detection and correction capabilities) to ensure the reliability of data (in the data storage process, a CRC check code is calculated for a data area, in the data writing process, the content of the storage area is read out again, the check code is calculated, and the data storage is reliable if the check code is consistent with the written data). 4. The software of the detection device adopts a trend measurement algorithm to identify the displacement of the displacement sensor: the data of 1S time is collected and stored in an array, data values are compared in sequence, the data are increased step by step and are judged to be in the positive direction, otherwise, the data are in the negative direction, a displacement curve is displayed on a screen according to the corresponding displacement, and the displacement in the positive direction and the displacement in the negative direction can be directly and accurately detected.

The key components of the application all adopt low-power consumption and long-life devices of international famous brands, the reliability and the service life of products are improved, and data display adopts large-screen Chinese liquid crystal, so that the detection is convenient.

The detection device can set corresponding parameters according to the requirements of the displacement sensor to read the data of the displacement sensor, and the microcontroller program in the detection device adopts a table look-up method to match a corresponding coordinate graph in a program table library according to the setting conditions of the displacement sensor and displays the coordinate graph on a display screen in a curve form, so that the quality of the sensor is analyzed. The main setting parameters include range, format type, digit and precision.

When the device is used, the SSI signal displacement sensor detection device is connected with a magnetic ring on the displacement sensor through the adapter box, the magnetic ring outputs SSI signals, the microcontroller reads position data output by the displacement sensor and detects the position of the magnetic ring, the position of the magnetic ring is 0, the acquired data is 0, the position on the magnetic ring is 100mm, the detection device displays 100mm, the detection device slowly moves to display a curve, the display of the continuous curve indicates that the displacement sensor is good, and if a breakpoint appears on the curve, the displacement sensor is bad.

As shown in fig. 2, the ordinate in the display interface is a measuring range, the abscissa is a time axis, the detection display [ DIS ] displays real-time detection data, the TYPE [ TYPE ] displays gray code or binary code format, the number of bits depends on the number of bits of the sensor to be detected, and the precision [ RET ] depends on the precision of the sensor to be detected.

As shown in fig. 3, the present application has the functions of signal sources: the manual operator can be provided with the following components: and 50mm is used as a standard signal, and then whether 50mm is displayed in the PLC is checked again, so that the signal channel is calibrated and checked. The manual operator calculates corresponding SSI data according to the setting data, outputs a corresponding SSI coding signal channel at the SSI interface to receive an SSI code, calculates a corresponding position value, and compares the displacement value of the signal source with the displacement value measured by the signal channel to determine whether the displacement value is consistent with the displacement value measured by the signal channel. If the signals are consistent, the signal channels are normal, and if the signals are inconsistent, the signal channels are in failure.

The detection device of the SSI signal displacement sensor is used for measuring range detection and calibration of the magnetostrictive displacement sensor of an SSI interface, can directly and accurately detect positive and negative displacement, displays a displacement curve on a screen according to the corresponding displacement, and enables a communication protocol to follow an SSI standard.

Example 2

An encoder detection device, includes microcontroller, watchdog module, interface module, SSI module and display module, wherein: the watchdog module is connected with the microcontroller and controls a reset pin of the microcontroller; the interface module comprises an SSI (Small Scale integration) interface and a parallel data interface, one end of the interface module is connected with the SSI encoder or the parallel encoder, and the other end of the interface module is connected with the SSI interface and the parallel data interface of the detection instrument through the aviation plug; the SSI module is used for receiving the real-time SSI format data sent by the encoder, converting the real-time SSI format data into TTL format data and transmitting the TTL format data to the microcontroller; the microcontroller receives TTL format data sent by the SSI module and sends a data signal to the display module; and the display module receives the data sent by the microcontroller and displays the data in a curve form. Preferably, the circuit of the detection device adopts an LC filter circuit, and the LC filter circuit is connected with the microcontroller to provide a stable power supply for the microcontroller. More preferably, the system further comprises a charging management module, wherein the charging management module is connected with the storage battery and is used for managing charging and controlling of the storage battery by the charger and calculating the electric quantity.

In addition, the detection device is also provided with parameter setting keys, wherein the parameter setting keys comprise switch keys, types, digits and the like, and the click type keys are switched between binary systems and Gray codes; the number of clicks button is switched cyclically from 7 to 12. The parameter setting key also comprises a mute switch and a backlight switch.

The encoder detection device is provided with the SSI interface and the parallel data interface, and the parallel data interface can detect encoders in two forms due to the fixed output modes of different encoders, such as 8-bit and 10-bit output modes. For an encoder of an SSI (Small Scale integration) interface, a microcontroller of a detection device controls an SSI module (SSI special interface chip) and reads a position value of the encoder; for the encoders of the parallel data interfaces, a microcontroller of the detection device directly reads the position values of the encoders by using parallel IO ports; the microcontroller displays the current position value on the liquid crystal screen, and displays the position value for a period of time on the liquid crystal screen in a curve form, which is used as a basis for a user to judge whether the encoder is good or bad.

The encoder detection device of the application is designed by adopting multiple anti-interference technologies: 1. the watchdog module can ensure that the system is reset in time when encountering interference; 2. the circuit adopts an LC filtering technology to protect the stable work of the MCU; 3. and a redundant design is adopted in the program, so that the system is prevented from entering a dead cycle or crash. The reliability of the product is improved, the service life of the product is prolonged, and the data display adopts large-screen Chinese liquid crystal, so that the detection is convenient.

The encoder detects rolling bearing's angle, and this application detection device can direct accurate detection forward and reverse turn to: the microcontroller program in the detection device adopts a trend measurement algorithm to identify the angular position of the user encoder and displays a turning angle curve on a screen according to the corresponding turning direction.

As shown in figure 4, the ordinate shows the range ANGLE of 0-360 degrees, the abscissa is spare, the data [ PULSE ] shows the real-time detection accumulated PULSE data, the data [ ANGLE ] shows the real-time detection rotation ANGLE data, and the precision [ BIT ] depends on the precision of the detected encoder.

When the encoder detection device is used, the quality of the encoder can be detected only by connecting the encoder with the detection device through a plug, and the liquid crystal screen is provided with two display modes of numbers and curves, so that the encoder detection device is visual and accurate; and can be taken to any place on the spot to detect the quality of the on-spot encoder, and is very convenient and fast.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The SSI signal displacement sensor detection device is characterized by comprising a microcontroller, a watchdog module, an interface module, an SSI module and a display module, wherein:

2. The SSI signal displacement sensor detection device as claimed in claim 1, wherein the detection device employs an LC filter circuit, and the LC filter circuit is connected to the microcontroller to provide a stable power supply for the microcontroller.

3. The SSI signal displacement sensor detection device as claimed in claim 1, further comprising a charging management module, wherein the charging management module is connected to the storage battery for managing charging and controlling of the storage battery by the charger and calculating of the amount of electricity.

4. The utility model provides an encoder detection device which characterized in that, includes microcontroller, watchdog module, interface module, SSI module and display module, wherein:

5. The encoder detection device according to claim 4, wherein the circuit of the detection device adopts an LC filter circuit, and the LC filter circuit is connected with the microcontroller to provide a stable power supply for the microcontroller.

6. The encoder detection device of claim 4, further comprising a charging management module, wherein the charging management module is connected to the storage battery, and is configured to manage charging, control, and calculate the amount of power of the storage battery by the charger.