SU872355A1 - Device for reading information off movable object - Google Patents

Description

one

The invention relates to the reading of information from moving objects, for example from railway cars, etc.

A device for reading information from a moving object is known, comprising an encoder with information strips, installed on the object, a light source and a lens, a photoelectric information converter with a phototarget, the output of which is connected to the information input of the clock-shifting unit through the amplifier the shift pulse counter with the decoder, as well as with the counting input of the shift register, the information input of which is connected to the output of the amplifier-former, and The output is connected to the information input of the accumulation register 1J.

A disadvantage of the known device is the distortion of the read information when changing the direction and speed of the object in the read zone.

The purpose of the invention is to increase the reliability of the read information.

The goal is achieved by the fact that it is equipped with a combination of beginning and end of the combination and a pulse generator, and the photoelectric converter is equipped with a receiving unit, a parallel-parallel transfer register and an information output unit, and the pulse generator is connected respectively to the control input

 the receiving unit, the clock input of the transfer register, the control input of the photoelectric converter information output unit, the counting amplifier input, and the beginning recognition input.

, Q and the end of the code combination and the shift clock pulse shaping unit, the output of the amplifier former is connected to one control input of the accumulation register and the information input of the recognition unit whose output is connected

ts with register {accumulation time, with a shift clock pulse shaping unit and another control input of the accumulation register, the third input of which is connected to one output of the decoder, the second output of the decoder is connected to the recognition unit

This is the beginning and end of the code combination, while the code sensor is provided with additional information strips of the beginning and end of the code combination.

The drawing shows a block diagram of the device.

The device consists of a light source 1, which, through a beam of light reflecting from the surface of the strips of the sensor 2, having a start 2.1 and end 2.2 code combination with a high reflectance, is connected through the objective 3 to the photo-transducer 4 of the information photoelectric converter 5, the output of which is through the unit 6 reception is connected to the information input of the parallel-serial transfer register 7, the information output of which through the issuing unit 8 is connected to the information input of the amplifier-former 9, which defines the generator P 10 pulses are connected to the control input of the receiving unit b, clock inputs of the transfer register 7, the control input of the output unit 8, as well as the counting inputs of the shaping amplifier 9, block 11 recognizing the beginning and end of the code combination, clock generating unit 12 the shift, the output of the amplifier 9 is connected to the information inputs of the block 11 recognizing the beginning and end of the code combination, the block 12 of the formation of the clock shift pulses, the shift register 13 and the control input of the cumulative register 14, output The recognition unit 11 is connected to the control inputs of the shift clock pulse forming unit 12 and the storage register 14, the output of the shift clock pulse shaping unit 12 is connected to the clock input of the shift register 13, as well as to the counting input of the shift pulse counter 15, the first output of which is through the descrambler 16 is connected to the control input of the cumulative register 14, and the second is connected to the control input of the recognition 11 unit of the beginning and end of the code combination.

Code sensor 2 consists of code strips deposited by dyes with two levels of reflection, with first 2.1 and end 2.2 of the code combination strips with a high reflectance applied. The code plate is designed with the aid of an objective 3 on the photosensitive area of the photomasking 4 of the photoelectric converter 5.

The electronic reading of the signals from the phototarget 4 is based on the principle of time gating, which means that the polling control signal continuously arrives from the master oscillator 10. At the same time, during the polling, an electronic reading of the signals from photomultiplication 4 to the parallel-serial transfer register 7 occurs.

In block 11, the recognition of the beginning and end of the code combination is the recognition of the pulse and its selection from the interference by the method of electronic integration

on the area bounded by fronts and a flat top.

The device works as follows.

The luminous flux of the light source 1 is projected onto the code plate of the sensor 2 mounted on the moving object when it enters the zone of action of the source. After transferring the signals to the parallel-sequential register 7, the receiving unit 6

 closes. In this case, the master oscillator 10 begins to produce three-phase clock pulses of shift, which arrive at the clock inputs of the parallel-serial register 7. On the positive front of the polling strobe of the output unit 8

units and device nodes are reset. On the negative front of the polling strobe, a serial shift of information from the transfer register 7 to the information input of the shaping amplifier 9 begins, to the counting input of which clock pulses are sent from the master oscillator to form the bounds of the code combination. At the next stage of the device operation algorithm, the registration of the code plate in the fixing field of the beginning 2.1 and the end 2.2 is checked. code combination.

Upon receipt of the control signal in block 12 of the formation of the clock signal "Resolution and from the moment of occurrence

0 of the negative front of the parcel and the start pulse start forming the clock shift pulses of the code combination, which go to the shift register 13 and the counter of the clock shift pulses 15. From this moment begins to be fixed

 the code combination received from the amplifier-maker 9, and the clock combination of the code combination is fed to the counter 15 clock shift pulses. As soon as the number of these

0 pulses will be equal to the required number equal to the number of binary bits of the code, then in the decryptor 16 a resolution is generated for parallel reading of information from the register 13 to the cumulative register 14. At the same time in the decoder 16

5, a control signal is generated, which is fed to the block 11 of recognizing the beginning and end of the code combination and issues a command to check the pulse width of the end of the code combination.

The code combination is rewritten into cumulative register 14 only if three signals are simultaneously received. The resolution from the amplifier 9, the block 11 recognizes the beginning and the end of the code combination and the decoder 16 to the control inputs of the cumulative register 14.

Thus, the introduction of a code sensor with stripes on it began

Claims (1)

Claim A device for reading information from a moving object, containing a code sensor with information strips mounted on the object, a light source and a lens, a photoelectronic information converter with a photo target, the output of which is connected through an amplifier-shaper to the information input of a shift clock pulse generating unit connected via a counter shear pulses with a decoder, as well as with a counting input of the shift register, the information input of which is connected to the output of the amplifier-former, and the output is connected ene to the data input of storage register, characterized in that, in order to increase the reliability of the read information, it is provided with a detection unit beginning and end of a codeword and a pulse generator, a photoelectric converter is provided with a receiving unit, in parallel ⁵ serial register transfer and delivery of the information unit, wherein this, the pulse generator is connected respectively to the control input of the receiving unit, the clock input of the transfer register, controlling the ₁₀ input of the unit for issuing photoelectronic information of the second converter, by the counting input of the driver-amplifier, the input of the recognition unit for the beginning and end of the code combination and the shift clock generating unit, the output of the driver amplifier15 is connected to one control input of the accumulation register and the information input of the recognition unit, the output of which is connected to the shift clock-generating unit and the other control input of the accumulation register, the third input of which is connected to one output of the decoder, the second output of which is connected to the unit is recognized the beginning and end of the code combination, while the code sensor is equipped with additional information bands of the beginning and end of the code combination.