Manuscript document detecting system and method

A manuscript document detecting system comprising:

• a scanning light radiating medium f or radiating scanning light toward a manuscript document put on a manuscript document mounting stand from the lower position of said manuscript document;
• a reflected light detecting medium for detecting said scanning light reflected on said manuscript document;
• and
• a scanning light reflecting section for reflecting said scanning light onto a predetermined place where relative positional relationship is ensured for at least the manuscript document putting standard on the scanning orbit of said scanning light,
• wherein the size and position of said manuscript document are detected by measuring a relative light receiving timing between reflected light from said scanning light reflecting section and reflected light from said manuscript document.

A method of detecting a manuscript document comprising the steps of:

• radiating scanning light toward said manuscript document put on a manuscript document mounting stand from the lower portion of said manuscript document;
• detecting said scanning light reflected on said manuscript document;
• generating pulse signal representing the scanning position of said scanning light;
• detecting the and portion of said manuscript document by use of said reflected light, and detecting the size or position of said manuscript document are detected by use of said standard pulse signal;
• generating pulse signal representing the start of light scanning and representing the position of the scanning light after starting the scanning operation per each of the respective predetermined time intervals;
• generating clock signal oscillating with a constant time period shorter than that of said pulse signal for measuring said predetermined time intervals;
• and
• calculating the position of said scanning light on the basis of the count value of said pulse signal and the count value of said clock signal.

A method of detecting a manuscript document comprising the steps of:

• radiating scanning light toward a manuscript document put on a manuscript document mounting stand from the lower position of said manuscript document;
• detecting said scanning light reflected on said manuscript document;
• reflecting said scanning light onto a predetermined place where relative positional relationship is ensured for at least the manuscript document putting standard on the scanning orbit of said scanning light;
• and
• detecting the size and position of said manuscript document by measuring a relative light receiving timing between reflected light from said scanning light reflecting section and reflected light from said manuscript document.

A manuscript document detecting system comprising:

• a control medium of said manuscript document detecting system, in which a manuscript document mounting stand having manuscript document to be detected is optically scanned from the lower side, and a first light receiving signal of a polarity obtained by the light reflected from the object existing at the side of said manuscript document for a focal distance established on the upper part of said manuscript document mounting stand and second light receiving signal of another polarity obtained by the light reflected from the object located at the more remote position than said focal distance are mutually outputted with opposite polarities for a predetermined level,
• wherein the size and position of said manuscript document are detected on the basis of the result of detecting only said first light receiving signal of first polarity,
• wherein the light source for generating scanning light is turned on and off or power-modulated with a predetermined period of duty cycle ratio excluding 50%, and
• wherein the size and position of said manuscript document are detected by use of only the light receiving signal coinciding with said period and duty cycle ratio.

A manuscript document detecting system in which a reflecting portion for reflecting said scanning light is provided on a predetermined position ensured in the relative positional relationship at least for the standard of mounting said manuscript document, said scanning light is radiated toward said manuscript document put on a manuscript document mounting stand from the lower portion of said manuscript document, the difference of the relative light receiving timing between the reflection light reflected from said reflecting portion and the reflection light reflected from said manuscript document is measured, and the size and position of said manuscript document are detected on the basis of the measured value,

• wherein said manuscript document detecting system further comprises:
• a reflected light measuring medium for measuring the light receiving period f or the reflection light from the portion for reflecting said scanning light;
• and
• a control medium for executing the control operation such that the manuscript document is processed as a predetermined manuscript document size in case that the period of receiving the light by use of said reflected light measuring medium exceeds a predetermined time period.

A manuscript document detecting system with in which the light turned on and of for power-modulated with a predetermined period is radiated toward a manuscript document mounted on a manuscript document mounting stand from the lower portion of said manuscript document mounting stand;

• wherein said manuscript document detecting system comprising a light receiving medium for optoelectrically converting said turned on and off or power-modulated light directed onto said manuscript document mounting stand an the incident light and for amplifying and binarizing;
• wherein the light receiving signal coinciding with said predetermined period is detected and thereby the size and position of said manuscript document are detected;
• and
• wherein said manuscript document detecting system further comprises:
• an operational calculation processing medium in which at least a monitoring time longer than said predetermined period is set previously and, in case that a “High” or “Low” level larger than a predetermined width is not detected during said monitoring time in said binarized light receiving signal, said light receiving signal is processed as a disturbance light.

A method of detecting a manuscript document comprising the steps of:

• scanning a manuscript document mounting stand having manuscript document to be detected from the lower side;
• mutually outputting with opposite polarities for a predetermined level first light receiving signal of a polarity obtained by the light reflected from the object existing at the side of said manuscript document for a focal distance established on the upper part of said manuscript document mounting stand and second light receiving signal of another polarity obtained by the light reflected from the object located at the more remote position than said focal distance;
• detecting the size and position of said manuscript document are detected on the basis of the result of detecting only said first light receiving signal of first polarity;
• and turning an and off or power-modulating the light source for generating scanning light with a predetermined period of duty cycle ratio excluding 50%, and
• detecting the size and position of said manuscript document are detected by use of only the light receiving signal coinciding with said period and duty cycle ratio.

A method of detecting a manuscript document comprising the steps of:

• providing a reflecting portion for reflecting said scanning light on a predetermined position ensured in the relative positional relationship at least for the standard of mounting said manuscript document;
• radiating said scanning light toward said manuscript document put on a manuscript document mounting stand from the lower portion of said manuscript document, the difference of the relative light receiving timing between the reflection light reflected from said reflecting portion and the reflection light reflected from said manuscript document;
• detecting the size and position of said manuscript document on the basis of the measured value;
• +p1 measuring the light receiving period for the reflection light from the portion for reflecting said scanning light;
• and
• executing the control operation such that the manuscript document is processed as a predetermined manuscript document size in case that the period of receiving the light by use of said reflected light measuring medium exceeds a predetermined time period.

A method of detecting a manuscript document comprising the steps of;

• radiating the light turned on and of f or power-modulated with a predetermined period toward a manuscript document mounted on a manuscript document mounting stand from the lower portion of said manuscript document mounting stand;
• optoelectrically converting said turned on and off or power-modulated light directed onto said manuscript document mounting stand as the incident light;
• amplifying and binarizing optoelectrically converted signal;
• detecting the light receiving signal coinciding with said predetermined period and thereby detecting the size and position of said manuscript document;
• previously Betting at least a monitoring time longer than said predetermined period;
• and
• processing said light receiving signal as a disturbance light, in case that a “High” or “Low” level larger than a predetermined, width is not detected during said monitoring time in said binarized light receiving signal.