CN208962679U - A kind of trapping printing system analog data bus - Google Patents

Abstract

The utility model relates to a kind of trapping printing system analog data bus, including host computer, the host computer is handled by dual-channel analog bus connection signal and controller, and the signal processing and controller connect optical sensor, and the optical sensor is for detecting detected material；Input signal matching and protection circuit, signal filter circuit, polarity switching, gain control circuit, bus arbitration control circuit and output buffering and protection circuit are set in data/address bus.The utility model has the advantages that optical sensor supports live hot plug movement, the hot plug at input signal end is supported；Observation in real time and positioning can be carried out to the Color mark signal of trapping printing system, printing efficiency, quality and accuracy are improved.

Description

A kind of trapping printing system analog data bus

Technical field

The utility model belongs to printing automation field, and in particular to a kind of trapping printing system analog data bus.

Background technique

When roll printing, a kind of color first is stamped with regard to one piece of version；This paper is overlayed in another piece of version again, makes chase Critically matches mutually completely, then another color is stamped, the chromaticity printing object of a dichromatism just completes.If when printing Carelessness, two pieces of versions do not match, or word location when cut blocks for printing in two pieces of versions is calculated inaccurate, then, it is printed as it Afterwards, the word of dichromatism will be irregular, can not read.If covering multiple color, can also do in this way, Bu Guotao Color is more, printing get up it is more bothersome, so needing extremely masterful technique.With modern electronic technology make rapid progress development, Traditional artificial Chromatography System is substituted by the Chromatography System of electronization.The identification of colour code is in electronic Chromatography System One maximum problem, it must assure that the correctness and real-time of identification, and previous conditional electronic Chromatography System is using number Color mark signal is transmitted, disadvantage is as follows: cannot a) react the variation of colour code in real time；B) it can not be observed later using digital signal To the amplitude size and variation of Color mark signal.

Utility model content

The purpose of this utility model is to solve the above problems, and provides a kind of trapping printing system analog data bus, energy Enough Color mark signals to trapping printing system carry out observation in real time and positioning, and printing efficiency and accuracy are high.

To achieve the above object, the utility model provides the following technical solutions:

A kind of trapping printing system analog data bus, including host computer, the host computer pass through dual-channel analog bus Connection signal processing and controller, the signal processing and controller connect optical sensor, and the optical sensor is for examining It surveys and is detected material；

Set in it input signal matching with protection circuit, signal filter circuit, polarity switching, gain control circuit, Bus arbitration control circuit and output buffering and protection circuit；

The input signal matching realizes Signal Matching circuit using electric resistance partial pressure and filtering with protection circuit, using resistance Partial pressure realizes electrical level match, carries out pre-filtering to interference signal using the filtering of capacitor primary；

The output end of the signal processing and controller, optical sensor signal input part be equipped with hot plug protection electricity Road, the signal filter circuit use five rank Butterworth frequency overlapped-resistable filters, and the polarity switching is set to anti-aliasing filter Behind wave device；

The gain control circuit is controlled using CPU, and the increasing of signal is realized by human intervention or automatically track Benefit control, gain control line are connected with CPU；

The bus arbitration control circuit is equipped with emulation bus arbitration controller and arbitrates to the right to use of emulation bus.

Further, the optical sensor (3) is twin-lens optical sensor, exports two-way analog signal, defeated Entering signal amplitude is 0~8V, and frequency bandwidth is between 0~10K.

Preferably, the gain control line of the gain control circuit is GainAdj.

The utility model has the beneficial effects that:

The mobile optical sensor of the utility model supports live hot plug movement, supports the hot plug at input signal end；It adopts With polarity switching, it is ensured that signal is not reduced or is saturated, and true analog signal is restored；Bus arbitration control avoids The conflict of emulation bus, improves amplitude output signal by arbitrary switch-over, so that host computer obtains correct analog signal, Observation in real time and positioning can be carried out to the Color mark signal of trapping printing system, printing efficiency, quality and accuracy are shown It writes and improves.

Detailed description of the invention

In order to illustrate more clearly of the utility model embodiment technical solution, will make below to required in embodiment description Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model in order to more clearly Illustrate the utility model embodiment or technical solution in the prior art, for those of ordinary skill in the art, is not paying Out under the premise of creative work, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the utility model analog data bus topology diagram；

Fig. 2 is that the utility model input signal matches and protects circuit diagram；

Fig. 3 is the utility model signal filter circuit figure；

Fig. 4 is the utility model polarity switching figure；

Fig. 5 is the utility model gain control circuit figure；

Fig. 6 is the utility model bus arbitration control circuit figure；

Fig. 7 is the utility model output buffering and protection circuit diagram.

Specific embodiment

A kind of trapping printing system analog data bus as shown in Figure 1, including host computer 1, the host computer 1 pass through double The processing of channel analogy bus connection signal and controller 2, the signal processing and controller 2 connect optical sensor 3, the light Sensor 3 is learned for detecting detected material 4.

Emulation bus composition:

A) input signal matching and protection circuit

B) signal filter circuit

C) polarity switching

D) gain control circuit

E) bus arbitration control circuit

F) output buffering and protection circuit

A) if Fig. 2 is that input signal matches and protection circuit:

Twin-lens optical sensor 3 exports two-way analog signal, and amplitude is opposite with frequency bandwidth to be not fixed, so needing Signal Matching work is done in the front end of signal processing.

3 0~8V of input signal amplitude of optical sensor, frequency bandwidth exist with the influence of detected material movement speed Change between 0~10K.The matching of this input signal is realized using electric resistance partial pressure with filtering with protection circuit, uses electric resistance partial pressure It realizes electrical level match, is filtered using capacitor primary to realize pre-filtering to interference signal.

It will do it hot plug movement since optical sensor 3 belongs to moving parts often at the scene, so input signal end Hot plug protection circuit be also the application design focal point.

B) if Fig. 3 is signal filter circuit:

Since the frequency band of 3 output signal of optical sensor changes with the movement velocity of detected material and change, so this The frequency at filter circuit design at full throttle moment is by frequency, and high frequency punctures therefore uses five rank Butterworths in order to prevent Frequency overlapped-resistable filter.

C) if Fig. 4 is polarity switching:

Since 3 output signal of optical sensor is polarity reversing signal, and this polarity reversing signal can be given when observation It is inconvenient and uncomfortable that people brings, and also certain difficulty is brought to subsequent signal processing, so behind frequency overlapped-resistable filter Using polarity switching.

Signal input is the output signal of upper level Butterworth filter, and BaseLineAdj0 BaseLineAdj1 is The output of input signal root mean square calculation circuit.

Root mean square calculation circuit is used to calculate the mean value of input signal, and the benchmark electricity of polarity switching is controlled with this value It is flat to convert polarity switching according to the amplitude of input signal, it is ensured that signal is not reduced or is saturated, and true mould is restored Quasi- signal.

The calculation formula of this polarity switching is as follows:

Vout=2Vref-Vin

Note: Vout is output signal

Vref is the value of BASELINEADJ

Vin is input signal

D) if Fig. 5 is gain control circuit:

Since the amplitude of input signal changes with the variation of measured material, the output amplitudes of photosensitive sensors 3 is 0~ 8V, so needing to improve signal amplitude when small signal, so as to the signal identification of later process circuit, observation and positioning.

This programme gain control circuit use CPU control model, by human intervention or automatically track both of which come Realize the gain control of signal, the gain control line of the gain control circuit is GainAdj.

E) if Fig. 6 is bus arbitration control circuit:

Due to wanting several emulation bus processing in parallel and controller 2 in emulation bus, in order to avoid emulation bus Conflict, so must there is emulation bus arbitration controller to carry out the right to use arbitration to emulation bus.

F) if Fig. 7 is output buffering and protection circuit:

Since it is desired that long distance transmission analog signal (usually at 50 meters or more), so emulation bus passes through arbitration control electricity Road needs to improve amplitude output signal so that host computer 1 can obtain correct analog signal later.

Emulation bus processing and controller 2 be also required to carry out hot plug at work, so each emulation bus processing and The analog signal output of controller 2 must also do hot plug protection.

The mobile optical sensor 2 of the utility model supports live hot plug to act, and supports the hot plug at input signal end；It adopts With polarity switching, it is ensured that signal is not reduced or is saturated, and true analog signal is restored；Bus arbitration control avoids The conflict of emulation bus, improves amplitude output signal by arbitrary switch-over, so that host computer obtains correct analog signal, Observation in real time and positioning can be carried out to the Color mark signal of trapping printing system, printing efficiency, quality and accuracy are shown It writes and improves.

The content not being described in detail in the utility model is the prior art.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model Protection scope within.

Claims (3)

1. a kind of trapping printing system analog data bus, including host computer (1), which is characterized in that the host computer (1) passes through The processing of dual-channel analog bus connection signal and controller (2), the signal processing and controller (2) connect optical sensor (3), the optical sensor (3) is for detecting detected material (4)；

Input signal matching and protection circuit, signal filter circuit, polarity switching, gain control circuit, bus are set in it Arbitration control circuit and output buffering and protection circuit；

The input signal matching realizes Signal Matching circuit using electric resistance partial pressure and filtering with protection circuit, using electric resistance partial pressure It realizes electrical level match, pre-filtering is carried out to interference signal using the filtering of capacitor primary；

The output end of the signal processing and controller (2), optical sensor (3) signal input part be equipped with hot plug protection Circuit, the signal filter circuit use five rank Butterworth frequency overlapped-resistable filters, and the polarity switching is set to anti-aliasing Behind filter；

The gain control circuit is controlled using CPU, and the gain control of signal is realized by human intervention or automatically track System, gain control line are connected with CPU；

The bus arbitration control circuit is equipped with emulation bus arbitration controller and arbitrates to the right to use of emulation bus.

2. a kind of trapping printing system analog data bus according to claim 1, which is characterized in that the optical sensing Device (3) is twin-lens optical sensor, exports two-way analog signal, and input signal amplitude is 0~8V, frequency bandwidth 0 Between~10K.

3. a kind of trapping printing system analog data bus according to claim 1 or 2, which is characterized in that the gain The gain control line of control circuit is GainAdj.