RU1810887C - Analogue signal input device - Google Patents

Abstract

The invention relates to automation and computer engineering and can be used in multichannel diagnostic and other measuring equipment controlled by signals from sensors of a multichannel system, in particular from a & deg sports training complex for athletes, wrestlers, etc. The aim of the invention is to increase the speed of the device. The achievement of the objective of the invention is achieved by determining, using a multiband circuit, the spectral composition of the signals from each sensor and processing the signals with a narrow frequency spectrum at an increased speed. In addition, in the absence of a signal from the sensor, the device allows almost instantly proceed to the interrogation of the next sensor. 2 ill. Yo

Description

The invention relates to automation and computer engineering and can be used in multichannel diagnostic and other measuring equipment, controlled by signals from sensors of a multichannel system, in particular, from a sports training complex for athletes, rowers, etc.

The aim of the invention is to increase the speed of the device.

Figure 1 presents the functional diagram of the device; figure 2 - schematic diagram of a pulse generator.

The device comprises a switch 1, comprising a pulse generator 2, a counter 3, a decoder 4, a block of 5 keys, a block of 6 sensors, an analog-to-digital converter 7, a group of 8 bandpass filters, a group of 9 peak detectors, a group of JO pulse shapers, a group of 11 single-vibrators , group 12 analog to hatches, group 13

amplifiers, a group of 14 frequency dividers, a clock 15, an analog switch 16, a driver 17, an amplifier 18, a group of 19 elements not, an element And 20.

The device operates as follows.

A digital-code packet of clock pulses is supplied to the control input of the device, the number of which determines the number of the switched channel. This packet goes to the control input of the switch and then to the input of generator 2.

After counting the pulses from the counting output of the generator 2 by counter 3, the decoder 4 sets the required switched channel, through which the signal from the sensor of this channel is fed to the ADC. The generator is started through a single-shot 0B (Fig. 2), which normalizes (in duration) the counting pulses.

With

about

00 00 XI

From the output of the single-vibrator, the pulses passing through the integrating circuit of the RzCai and the inverter form permissive signals for the ADC. The digital conversion cycle of the analog signal from the sensor starts with a start pulse at the ADC start input in the presence of an enable signal, which also starts the clock generator 15. The generator 15 is made according to the generator circuit with shock excitation. In accordance with the generated digital code, a certain channel of the switch 1 is turned on and the generator 15 is started. The signal of the transmitter 2 passes through the switch to the p-band filters 8. This signal passes almost without attenuation through the filter whose passband corresponds to the spectral composition of the analog signal. The peak detector 9 of the corresponding channel supplies a signal of various amplitudes to the pulse shaper 10 with an adjustable threshold level. Depending on the amplitude of the signal from the detector 9, the pulse shaper 10 either generates a triggering single-vibrator 11 pulse or not when the signal level is small and the threshold level is not overcome.

After starting the single-vibrator 11, the corresponding key 12 is turned on, which supplies the signal from the generator 15 through that frequency divider 14, which also corresponds to the spectrum of the processed signal from the sensor 6, i.e. with a certain frequency division coefficient of the divider 14. A decoupling amplifier-driver 13 is connected to the output of the key 12, which on the one hand generates a packet of clock pulses for starting the ADC 7, and on the other hand, leaves the output impedance of the ADC that is currently connected to the start input -7 amplifier 18 is virtually unchanged. When the spectral composition of the analog signal is such that the peak detectors 9 pass the start pulses to the single-vibrator 11 through several processing channels, to all the reset inputs of the single-vibrators 11 preceding the current channel, the reset pulses pass through the valve elements, and only one, higher-frequency, remains active. channel, with the corresponding average frequency of the band-pass filter.

. In the absence of signals at the outputs of all one-shots 11, a single (high) level is set on the elements of HE 19, the logic element L 20 generates a unlocking key 16, the signal also

0

5

0

5

0

5

0

5

0

5

the ADC start input 8 passes through an amplifier 18 and a former 17, a packet of clock pulses as high as possible, an order of magnitude higher than the upper frequency spectrum of the analog signals, the frequency of the oscillator 15. The frequency division coefficient of the dividers 14 is defined as the ratio a / p, where a is any - according to experimental data, the number, n is the current number of the additional channel. Suppose the upper limit of the frequency spectrum of analog signals is 200 kHz.

The frequency of the oscillator 15 is ten times greater than 2.0 MHz. Therefore, a 200, n 1, 2, 3, .... 10. Then for the 1st additional channel Kdel.1 200/1 200 (fcp 10 kHz). For channel 2: Kdel. 200/2 100 (fcp 20 kHz) ... for channel 5: Kdel. 5 200/5 40 (fcp 50 kHz) ... for fifth (10th ) channel: Kdel.yu 20 (fcp 100 kHz).

Claims (1)

SUMMARY OF THE INVENTION An analog signal input device comprising a switch, an analog-to-digital converter and a clock, the information inputs of the switch are information inputs of the device, the information output of the switch is connected to the information input, an analog-to-digital converter, the outputs of which are information outputs of the device, the input control switch is the control input of the device, the control output of the switch is connected to the start input of the clock generator and the enable input an ogo-digital converter, characterized in that, in order to increase the speed of the device, a group of bandpass filters, a group of peak detectors, a group of pulse shapers, a group of single vibrators, a group of analog keys, a group of amplifiers, a group of frequency dividers, a group of elements NOT, an element are introduced into it And, an analog switch, driver, amplifier, a group of one-way conductivity elements, the information output of the switch is connected to the inputs of bandpass filters, the outputs of which are connected to the inputs of peak detectors Hur, the outputs of which are connected through pulse shapers with single trigger inputs vibrators whose outputs are connected to control inputs of analog switches and a group through the corresponding NOT elements - with input AND element whose output is connected to the control input of the analog of the key, the outputs of the analog keys of the group are connected to the inputs of the amplifiers of the group, the outputs of which and the output of the amplifier are connected to the start input of the analog-to-digital converter, the reset input of each previous single-vibrator of the group is connected through the one-way conduction element to the outputs of all subsequent analog keys of the group, the output of the clock generator is connected to the information input of the analog key and the inputs of the frequency dividers of the group, the outputs of which are connected to the information inputs of the analog keys of the group, the output of the analog key is connected through the driver to the amplifier input.  Figure 1