Multifunctional absolute converter for position detection and multiaxis control system, has programmable logic device to perform predetermined process to digital position signal output by converter

The invention relates to a multi-function absolute value converter, the one on a user-specification-based interface can be customized.

State of the art

An absolute value converter with a preset specification includes a Converter circuit for converting absolute value sensor detection signals into digital position signals, and it is configured to output digital signals, which have a specific, predetermined pattern. At every required Changing the signal specification, it is therefore necessary to make changes in the circuit of the Absolute value converter. In addition, information in the System ROM and to retrieve information from this system ROM clear in which signal conversion lookup tables as well Conversion control programs and the like are stored, you have the ROM remove or create separate write patterns.

The aim of the present invention is to provide a A multi-function absolute value converter that easily converts output signal patterns and the like can.

Disclosure of the invention

A multi-function absolute value converter according to the invention contains a sensor I / O port with multiple sensor connection ports connected to multiple ports Absolute value sensors can be connected, a converter circuit for Converting absolute value sensor detector signals via the Sensor connection terminals are input to digital position signals, a programmable logic device that generates predetermined processing of the thus generated digital position signals, using a host I / O port Output terminals for outputting the digital position signals and of Signals generated by the programmable logic device, a Switching device for switching sensor connection terminals, and a Control circuit for controlling each part, wherein the control circuit is primarily a CPU, a ROM and a RAM contains.

The switching by the switching device can be controlled by switch signals from the side the control circuit or by switching control signals passing through the host I / O connection can be entered.

Other features Features of the invention and its features and Advantages are more apparent from reading the following description with reference to the drawings.

The single figure shows a schematic block diagram of an embodiment the multi-function absolute value converter according to the invention.

<b>FIG.</b> 1 shows a block diagram of an embodiment of the invention inventive multi-function absolute value converter. According to<b>FIG.</b> 1 contains one Multifunction absolute value converter <b>1</b> a sensor I / O port <b>4</b>who is several Sensor connection terminals <b>3</b>(<b>1</b>), 3 (<b>2</b>), 3 (<b>3</b>). , , contains that to several Absolute Sensorenen <b>2</b>(<b>1</b>2,<b>2</b>2,<b>3</b>). , ., Can be connected, a converter circuit<b>5</b> to the Transform by the absolute value sensors <b>2</b>(<b>1</b>2,<b>2</b>2,<b>3</b>). , , about the Sensor connection terminals <b>3</b>(<b>1</b>), 3 (<b>2</b>), 3 (<b>3</b>). , ., supplied detector signals in digital position signals, a programmable logic device (PLD) <b>6</b>, the perform predetermined processing of the digital position signals thus generated can, a host I / O port <b>8th</b> with output connections <b>7</b> to spend the digital position signals as signals from the PLD <b>6</b> were created a switching device <b>9</b> for switching the sensor connection terminals <b>3</b>(<b>1</b>), 3 (<b>2</b>) 3 (<b>3</b>). , ., and a control circuit<b>10</b>, to control the parts <b>4</b>. <b>5</b>. <b>6</b> and <b>8th</b>, in which the control circuit <b>10</b> mainly containing a CPU, a ROM and a RAM.

The switching by the switching device <b>9</b> is controlled by Switching control signals from the circuit <b>10</b> or by switching control signals passing through the host I / O port <b>8th</b> be entered.

With the thus configured embodiment of the Multifunction absolute value converter <b>1</b> can be several absolute value sensors <b>2</b>(<b>1</b>2,<b>2</b>2,<b>3</b>). , , connect, and by switching the switching device <b>9</b> according to switching control signals from the control circuit <b>10</b> or a host system, detector signals of the Absolute sensors <b>2</b>(<b>1</b>2,<b>2</b>2,<b>3</b>) are used to determine the absolute value of a Detect object to be detected.

Because the system is the PLD <b>6</b> contains, this PLD <b>6</b> be reprogrammed, and you can also add or change functions by using the Control program changes, which in the ROM of the control circuit <b>10</b> is stored. For example, there is the possibility of an absolute position detection while processing various types of data. Examples of the Processing of data types involves data stabilization by the Method of moving averaging, an eigencalibration of the Detector signals by the time scale method by the detection object with uniform Speed ​​is turned.

There is also the possibility of high-order bit count data thereby to output that one counts the increments in the PLD <b>6</b> extended. Integration the PLD <b>6</b> also allows a high degree of adaptability User specifications by providing a direct connection to user-side Extension busses, which connects to FA-LANs, and by adapting to user-side serial transmission formats follows.

When the multi-function absolute value converter <b>1</b> to a host computer is connected, it is possible to use the host computer as a remote control for the multi-function absolute value converter <b>1</b> to insert and to the memory of the converter <b>1</b> access. A USB port can serve a fast Registered in a flash ROM <b>11</b> make that to the converter circuit <b>5</b> is connected, and stored in which conversion table memory are.

As described above, the multi-function Absolute converter a PLD, ie a programmable logic device (Programmable Logic Device), which enables the system to flexibly User specifications by reprogramming the PLD or reprogrammed. It is also possible to capture axes switch or change to thereby selectively detect detector signals from multiple Enter absolute value sensors. The result is a Multi-function absolute value converter with a high degree of possible applications, eg. B. Positioning systems, which are of a multi-axis axis control of an object, based on detector signals from multiple absolute value sensors.