Zhiming J Ji, 6898 Parsippany Rd, Whippany, NJ 07981

5113080, May 12, 1992

Jul 10, 1990

7/550628

Ming C. Leu - Pinebrook NJ
Zhiming Ji - Kearny NJ

New Jersey Institute of Technology - Newark NJ

G01N 2186

250561

An optical displacement measuring apparatus utilizing triangulation, includes a laser for projecting a laser light beam with a first optical axis onto a surface of an object whose displacement is to be measured; an array of photodetectors for receiving light reflected from the object and for generating a positional signal as an image displacement. delta. ; a condensing lens for receiving the light reflected from the object and for supplying the reflected light to the detector array along a second optical axis intersecting the first optical axis at angle. theta. , the detector array being inclined at an angle. phi. with respect to the second optical axis; a determining device for non-linearly determining surface displacement as a function of the image displacement. delta. and the angles. phi. and. theta. , with the relationship between the image displacement. delta.

6253116, Jun 26, 2001

Aug 4, 1998

9/128805

Wei Zhang - Kearny NJ
Ming C. Leu - Pine Brook NJ
Zhiming Ji - Newark NJ
Yongnian Yan - Bejing, CN

New Jersey Institute of Technology - Newark NJ

G06F 1900

700119

A method and apparatus for forming three-dimensional patterns by depositing a crystalloid material onto substrate in a layer by layer fashion. The apparatus includes a computer responsive for controlling the material depositing rate and the three-dimensional relative movement between the depositing head and the substrate. The controlling information comes from the sliced CAD model of the part. For each cross-section, the depositing head plots the boundary and the interior while the building material comes out of the head. The crystalloid material deposited on the substrate or previous layer of the part rapidly freezes forming a new layer of the part. The material can be deposited by a continuous extruding device or a drop-on-demand device. Where necessary, support structure is built in the same way but with material of a different melting point. The ambient temperature is accurately controlled to a certain low point in order to make the deposited material flow to a certain extent and freeze after a short time.

5990587, Nov 23, 1999

Jun 27, 1997

8/883832

Michael Shimanovich - Woodhaven NY
Reggie J. Caudill - Princeton NJ
Timothy N. Chang - Pompton Plains NJ
Zhiming Ji - Whippany NJ

New Jersey Institute of Technology - Newark NJ

H02K 706
H02K 4100
H02K 709
F16H 118

310 80

In one embodiment, a device for generating ultra-high precision rectilinear movement based on aerostatic suspension and magnetic traction, the device including a nut, a leadscrew, a thrust bearing, a contactless motor, and feedback drive electronics. The contactless motor provides the actuation by turning the leadscrew which is made of magnetically soft materials and has a pitched helical groove machined on its surface. The leadscrew passes through the core of the nut which is free to move in a rectilinear motion on a aerostatically suspended guide. The nut, also made with magnetic material, has a matching helical groove in its core so that a closed magnetic circuit is formed between the grooves of the leadscrew and the nut. The closed circuit in turn provides the necessary magnetic traction to move the nut in a rectilinear fashion. A primary aerostatic suspension is utilized to stabilize and center the leadscrew and nut transversally.

2020032, Oct 15, 2020

Mar 17, 2020

16/821275

- Newark NJ, US
Zhiming Ji - Whippany NJ, US
Mengchu Zhou - Basking Ridge NJ, US
Joseph Glaz - Fair Lawn NJ, US
Bo Zhang - Kearny NJ, US

New Jersey Institute of Technology - Newark NJ

F04B 35/00
F04B 27/00
F04B 39/06

A vacuum generation system and method utilizes a dual-action piston-cylinder vacuum generation system to evacuate a vacuum storage. Saturated steam of higher than ambient pressure is inserted into a condensation cylinder with two chambers separated by a movable piston. Steam moves the piston to fill one chamber while expel gaseous content and condensate out of the other chamber. Steam is then condensed to a rough vacuum (RV) state by cooling. By repeated operations of inserting and condensing steam in each chamber alternatively, a sustained vacuum generation is achieved. A multi-level vacuum storage is also disclosed with a high vacuum (HV) storage placed inside a rough vacuum (RV) storage to reduce leakage as well as mechanical stresses. The vacuum generation system and method is extended for creating a prime mover or actuator to drive vacuum pumps maximizing thermal energy usage for increased vacuuming capacity.

2018034, Dec 6, 2018

May 30, 2018

15/993093

- Newark NJ, US
Zhiming Ji - Whippany NJ, US
Mengchu Zhou - Basking Ridge NJ, US
Guangyu Guo - Kearny NJ, US
Bo Zhang - Kearny NJ, US

B01D 3/10
B01D 3/14
B01D 5/00
B01D 3/00
C02F 1/06

A system and method for vacuum distillation and desalination contains integrated vacuum generation. Latent heat and a vacuum produced with steam condensation are used for distillation and desalination of liquid. The distillation and desalination system could comprise a spray evaporator and a condenser for receiving a feed stream for distillation or desalination. Produced are water flow condensate and concentrated liquid flow. A vacuum pump is actuated with condensation-induced dual-action piston-cylinder vacuum generation technology. The vacuum generator is configured to transfer latent heat from condensing steam vapor in its cylinder to the feed stream. Steam is also configured to transfer latent heat directly to the feed stream circulated through evaporators and condensers. A distillation and desalination method with active vacuuming and self-distillation in staggered multi-stage arrangement provides for efficient energy recovery. Use of multi-stage arrangement maximizes thermal energy usage for increased distillation capacity and applicability.

2017035, Dec 14, 2017

Jun 8, 2017

15/617612

- Newark NJ, US
Zhiming Ji - Whippany NJ, US
Mengchu Zhou - Basking Ridge NJ, US
Joseph Glaz - Fair Lawn NJ, US
Bo Zhang - Kearny NJ, US

F04B 37/14
F04B 39/06
F04B 41/02
F04B 39/00
F04B 39/12

A system and method for vacuum generation is disclosed. A saturated steam of higher than ambient pressure is inserted into a condensation cylinder with two chambers, separated by a movable piston, and wall-imbedded heat exchangers. The steam moves the piston to fill one chamber while expel gaseous content and condensate out of the other chamber. The steam is then condensed to a rough vacuum state by cooling. By repeated operations of inserting and condensing steam in each chamber alternatively, a sustained vacuum generation is achieved. A system and method for constructing a multi-level vacuum storage is also disclosed, with a high vacuum chamber placed inside a rough vacuum chamber to reduce the leakage as well as mechanical stresses. Furthermore the vacuum generation system and method is extended for creating a prime mover or actuator to drive vacuum pumps, maximizing the thermal energy usage for increased vacuuming capacity.