SU444232A1 - Angle Code Transducer - Google Patents

Description

one

The invention relates to the field of automation and computer technology and can be used to connect the measured analog value with a digital computing device.

In the known angle-code converters containing a sine-cosine rotary transformer (CCST), the input and output of which are connected to the octant separation unit, the voltage-to-voltage conversion unit. the input of which is connected to the output of the switch, a non-linear voltage-to-code conversion unit is used, which greatly complicates the converter.

The purpose of the invention is to simplify the converter.

To do this, it additionally introduces a block of the fourth high bit, the inputs of which are connected to the outputs of the block of the octant selection, and the outputs of the blocks of the selection of octant and the fourth high bit are connected to the inputs of the switch.

The drawing shows a structural diagram of the proposed Converter.

The converter contains a sine-cosine rotary transformer 1, an octant separation unit 2, a fourth most significant allocation unit 3, a switch 4, a voltage-to-code unit 5. The fourth bit allocation unit 3 consists of an inverter b, a summing amplifier 7, a sign shaper 8, a shaper 9 of the fourth bit code. The Converter operates as follows.

The input and output voltages of the SCRT are fed to an octant allocator 2, the output of which takes the values of the three most significant bits of the output angle code (2, 2, 2).

In addition, in block 2, the absolute values of the SCRT output voltages are generated by detection. In the first octant from block 2, the detected voltage of the cosine winding is applied to the inverter b of block 3,

and in the second octant - with a sinus winding. From another output of block 2, the detected voltage from the sine winding is fed directly to the block 3 resistor in the first octant, and from the cosine is used in the second octant

windings.

For a pair of octants, the law of change of the detected output voltages is identical, identical, and the form of voltages applied to the corresponding inputs of the block

3. Then assume that the inverter 6 of the block 3 is supplied with the detected voltage values having the cosine curve of change in odd octants and the sinusoidal law of change is in even octants, and the resistor of the block 3 is supplied with the detected voltage values that have the sinusoidal law in odd octants changes, in even octants, the cosinusoidal law of change. In block 3, the value of the fourth most significant bit of the output code 2 is determined by analyzing the polarity of the voltage, changing according to the law sin (6 - 22.5 °) for the angles located in the baking octants, and according to the law cos (6 + 22, 5 °) for angles in located in even octants. The value of the fourth most significant bit corresponds to 1 with a positive polarity of the voltage varying according to the sin law (in –22.5 °) and a negative polarity of the voltage varying according to the cos law (in + 22.5 °). Otherwise, the value of the fourth most significant bit corresponds to 0. To obtain the values of stresses that change according to the laws sin (6–22.5 °) and cos (6 + 22.5 °), the following relations sin are used (in –22.5 ) - sin in cos 22.5 ° - cos in sin 22.5 ° cos (in + 22.5 °) cos 9 cos 22.5 ° - sinBsin 22.5 ° which after substitution of numerical values take the form sin (9 - 22.5) - 0.924 sin in - 0.383 cos in cos (E + 22.5 °) - 0.924 cos 0 - 0.383 sin in. The obtained equations are solved using a solver consisting of inverter 6, summing amplifier 7 and resistors, selected in the respective ratios (R 1, 2.61 /). The voltage from the resolver is fed to the sign shaper 8 and then to the shaper 9 to form the value of the fourth most significant bit. At the other input of the imaging unit 9, a signal is received on the value of the third most significant bit, corresponding to O for angles 9, lying in odd octants and 1 for angles в, lying in even octants. A signal corresponding to the value of the fourth most significant bit is not output from the output of the imaging unit 9. Next, the device determines the angle in the range of 22.5 °. For angles 6, located in odd octants and having a zero value of the fourth most significant discharge, the voltage from the output of block 2 connected to the resistor of block 3, through the switch 4 is fed to the input of the linear voltage conversion block 5, from the output of which values of the lower bits of the output code 2 ... 2-. For angles 0 located in odd octants and having a unit value of the fourth most significant bit, the voltage from summing amplifier 7, proportional in this case sin (данном - 22.5 °), is also fed to switch 5 through the switch 4. The output code bits for angles 6 located in odd octants are formed by reading information from block 5 in the forward code. If the angles in are in even octants and have a zero value of the fourth most significant bit, the voltage from summing amplifier 7, proportional in this case cos (9 -f 22.5 °), through switch 4 is fed to block 5. The values of the least significant bits corners 9, located in even octants, are formed by reading information from block 5 in the additional code. For angles 9, located in even octants and having a unit value of the fourth most significant bit, the voltage from the output of block 2 connected to the resistor of block 3 is fed through switch 4 to the input of block 5, from the output of which the lower bits in the additional code are read . The signal that generates a direct or additional code from the output of block 5 is fed to the second input of block 5 from the output of the third most significant bit of block 2. Subject of the invention Angle-code converter containing a sine-cosine rotating transformer whose input and output are connected to an octant extraction unit, a voltage conversion unit to a code whose input is connected to a switch output, characterized in that, in order to simplify the converter, a fourth higher order discharge unit is additionally introduced Having inputs coupled to isolate the outputs of the octant, and the isolation block outputs octant and fourth most significant bit are connected to the inputs of the switch.