Diagnostic method for analyzing and monitoring the process parameters in the operation of reciprocating equipment
OwnerJohn Mickowskiinventor
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Abstract
The method of the present invention utilizes a microcomputer in combination with a CRT and a multiplicity of transducers for monitoring process parameters in the operation of a reciprocating device having a linear stroke. A profile of the process parameters including pressure and velocity are generated as a function of stroke length and time and are stored in a non-volatile memory and graphically displayed on the CRT as master traces for comparison with current data profiles. The velocity is calculated by dividing distance transversed with time or by use of a velocity position transducer.
Claims38
A diagnostic method for analyzing and monitoring the process parameters of reciprocating equipment in which a linear reciprocating injection device is traversed over a fixed stroke length at high speed comprising the steps of:
- (a) dividing said stroke length into a predetermined number of incremental positions;
- (b) generating analog data corresponding to at least the position of said injection device and the pressure developed by said injection device at each such incremental position;
- (c) recording the time transpired in the movement of said injection device along said stroke length;
- (d) deriving the velocity of said injection device at each such incremental position;
- (e) graphically displaying the data corresponding to pressure and velocity on a display screen of a cathode ray tube as a function of the incremental position of said injection device along said stroke length until said velocity reaches a predetermined minimum level, with said display forming a master profile for said data;
- (f) storing the data representing said master profile at a predetermined address location in a nonvolatile memory of a microcomputer;
- (g) repeating the sequence of generating, [calculating] deriving and storing analog data corresponding to pressure and velocity as a function of stroke position for a second die casting [operating] operation to form a current profile of such data for such second operation, and
- (h) displaying said current profile on said display screen along with said master profile for diagnostic comparison purposes.
A diagnostic method for analyzing and monitoring the process parameters of reciprocating equipment in which a linear reciprocating device is traversed over a fixed stroke length at high speed comprising the steps of:
- (a) dividing a parameter indicative of movement of the device into a predetermined number of incremental data collection points;
- performing, for a first ram cycle, the following steps (b)-(f):
- (b) generating data corresponding to said parameter and the pressure developed by said device at each such incremental data collection point;
- (c) recording the time transpired in the movement of said device along said stroke length;
- (d) determining the velocity of said device at each such incremental data collection point;
- (e) generating a graphical representation corresponding to pressure and velocity as a function of the device movement parameter along said stroke length;
- (f) storing said data in the form of master profile data at an address location;
- (g) repeating the sequence of generating data, determining velocity and storing data corresponding to pressure and velocity as a function of movement of said linear reciprocating device for a second ram cycle to form a current profile of such data for such second ram cycle;
- and
- (h) generating a graphical representation of said current profile along
- with said master profile for diagnostic purposes.
A method for monitoring the process parameters of a linear reciprocating device which traverses a stroke path at high speed to develop pressure, said method comprising the steps of:
- (a) collecting data at each of a plurality of data collection points, said data corresponding to a parameter indicative of movement of the device and the pressure developed by said device during a first ram cycle;
- (b) graphically representing a first pressure and velocity profile as a function of the movement of said device along said stroke path based on said data collected by said step (a);
- (c) repeating said collecting step (a) for a further ram cycle;
- and
- (d) graphically representing a further pressure and velocity profile as a function of the movement of said device along said stroke path based on
- said data collected by said repeated step (a).
A method for monitoring the process parameters of a reciprocating apparatus of a type including a ram which traverses a stroke path at high speed to produce pressure, said method including the following steps:
- (a) providing a stored representation of a master velocity profile for said ram as a function of position of said ram along said stroke path;
- (b) measuring the movement of said ram;
- (c) deriving a velocity signal indicating velocity of said ram at a plurality of positions along said stroke path based on said measured movement;
- and
- (d) generating, based on said stored representation and said velocity signal, a superimposed graphical representation of (i) said ram velocity as a function of said plurality of positions of said ram along said stroke path and (ii) said master velocity profile.
A method for monitoring the process parameters of a high speed reciprocating ram, said ram traversing a stroke path at high speed to produce pressure, said method including the following steps:
- (a) storing indicia of electrical signals representing a master pressure profile;
- (b) measuring position of said ram along said stroke path;
- (c) measuring pressure produced by said ram;
- and
- (d) electrically generating an image including:
- a first graphical representation of pressure versus position of said ram along said stroke path based on said measured position and pressure, and
- a second graphical representation of pressure versus position of said ram along said stroke path based on said stored master pressure profile indicia,
- said first and second graphical representations being at least partially
- superimposed in said image.
A method for monitoring a reciprocating apparatus including a ram traversing a stroke path at high speed to produce pressure, said method including the following steps:
- (a) measuring movement of said ram;
- (b) deriving a velocity signal from said measured movement, said velocity signal indicating velocity of said ram at a plurality of positions along said stroke path;
- (c) deriving a pressure signal indicating said pressure produced by said ram at a plurality of positions of said ram along said stroke path;
- and (d) graphically representing said velocity and pressure signals as a function of position of said ram along said stroke path.
A method for monitoring a reciprocating apparatus including a ram and for electrically generating a graphical representation of results of said monitoring, said ram traversing a stroke path at high speed during a ram cycle to produce pressure, said method including the following steps:
- (a) providing a time base;
- (b) measuring position of said ram for a first ram cycle;
- (c) measuring pressure produced by said ram for said first ram cycle;
- (d) electrically generating a first graphical representation of pressure versus position of said ram for said first ram cycle based on said measured ram position and said measured pressure;
- and
- (e) electrically generating a second graphical representation of pressure versus time for said first ram cycle based on said measured ram pressure and said time base, including the step of facilitating substantially simultaneous viewing of said first and second graphical representations.
Apparatus for monitoring the process parameters of reciprocating equipment, said equipment including a ram which traverses a stroke path at high speed to produce pressure, said apparatus comprising:
- measuring means coupled to said ram for measuring the movement of said ram;
- velocity means coupled to said measuring means for deriving a first signal indicating velocity of said ram at a plurality of positions along said stroke path based on said measured movement;
- a memory storing indicia representing a master velocity profile for said ram as a function of position of said ram along said stroke path;
- and
- imaging means coupled to said velocity means and to said memory for generating a superimposed graphical representation of (i) said velocity as a function of position of said ram along said stroke path and (ii) said
- master velocity profile.
Apparatus for monitoring the process parameters of reciprocating equipment, said equipment including a ram which traverses a stroke path at high speed to produce pressure, said apparatus including:
- movement measuring means coupled to said ram for measuring the movement of said ram;
- pressure measuring means for measuring the pressure produced by said ram as said ram traverses said stroke path;
- means for storing indicia representing a master pressure profile for said ram;
- and
- electrical imaging means, coupled to said storing means, said movement measuring means and said pressure measuring means, for generating an image based on said measured movement and pressure, said image including (i) a first graphical representation of pressure versus position of said ram along said stroke path, and (ii) a further graphical representation of pressure versus ram position along said stroke path based on said stored master pressure profile indicia, said first and second graphical representations being at least partially superimposed in said image.
Apparatus for monitoring the process parameters of reciprocating equipment, said equipment including a ram coupled to a fluid which traverses a stroke path at high speed to produce pressure, said apparatus including:
- movement measuring means coupled to said ram for measuring the movement of said ram;
- means coupled to said movement measuring means for deriving a first signal indicating velocity of said ram at a plurality of positions along said stroke path based on said measured movement;
- pressure sensing means for providing a second signal indicating pressure produced by said ram at a plurality of positions of said ram along said stroke path;
- and
- imaging means coupled to said deriving means and said pressure sensing means for generating a graphical velocity and pressure profile representation of said first and second signals as a function of said plurality of positions of said ram along said stroke path.
Apparatus for monitoring the process parameters of reciprocating equipment, said equipment including a ram traversing a stroke path at high speed during a ram stroke cycle to produce pressure, said apparatus comprising:
- first measuring means for measuring the movement of said ram for a first ram stroke cycle;
- second measuring means for measuring the pressure for said first ram stroke cycle;
- third measuring means for measuring the passage of time during which said movement and pressure are measured;
- and
- output means coupled to said first, second and third measuring means, for producing signals representing first and second substantially simultaneously viewable graphical representations based on said measured ram movement, said measured pressure, and said measured time passage, said first graphical representation showing pressure of said fluid versus position of said ram for said first ram stroke cycle, said second graphical representation showing pressure of said fluid versus time for said first ram stroke cycle.
Dependencies are inferred from the claim text.