JPod Chassis Specification – Type C (battery powered)

Purpose:        The purpose of this specification is to define the functional requirements of the JPod chassis for a passenger JPod.

Definitions:        JPod – a small vehicle, electric motor driven, suspended and supported from an overhead rail

        Bogie – the electric motor carriage that runs inside the overhead rail and from which the JPod chassis is hung.  The bogies includes power distribution electrical equipment and a computer.

        Chassis – the compartment that carries the payload (i.e. people, cargo, etc.)

JPod Systems Codes and Standards

The following codes and standards apply to the design and construction of the JPod chassis:

                

Issuing Organization

Code / Standard

Title

ASTM International

ASTM F2291

Standard Practice for Design of Amusement Rides and Devices

 National Fire Protection Association

NFPA 70

National Electrical Code

ASCE

ANSI/ASCE/T&DI 21-05

Automated People Mover Standards

Functional Requirements

Space Envelope & Weight Limit

The JPod chassis shall fit within the space envelop shown in drawing 0001D0042, latest revision.  The total chassis weight shall not exceed 700 pounds.

Space Allocations

Passenger Compartment

  1. The JPod shall seat 4 adults.  Two people will face forward and two people will face rearward with their knees toward the center of the J pods chassis.
  2. There shall be one door in one side of the chassis for people to enter and exit.
  3. There shall be a touch screen operator interface inside the compartment to take commands and provide information.
  4. There shall be a closed circuit video camera inside the compartment to record passenger activities to permit subsequent billing for intentional damages.
  5. The front and both sides shall have windows. (optional: the side windows may slide partway open to provide natural ventilation)
  6. The chassis shall have interior lighting using LEDs.
  7. There shall be an accessible, but out of normal reach, emergency stop button.
  8. Thermostat (used to start and stop heat pump) to automatically adjust to passenger comfort.
  9. The door shall lock prior to the JPod beginning motion. Lock override via encrypted command.
  10. The passenger compartment shall have a fire extinguisher. (CO2 type preferred)

Interfaces:

Mechanical:

The JPod chassis interfaces to two overhead supported bogies. Each bogie has a swivel ring which will be attached to a clevis on the top of the J pods chassis. Clevis must accommodate a swivel ring which is ½ inch thick.

The underside of the JPod chassis shall have a “catcher” groove as shown on drawing 0001D0042.  The groove will catch a horizontal wheel at the loading station which prevents the JPod from moving side to side during loading and unloading.

Electrical:

A power cable leads from the J pods chassis battery pack up to each of the J pods bogies. Power conditioning and distribution is accomplished within the J pods bogies.

A power cable leads down from the bogie into the J pods chassis to provide power for the lighting, HVAC, passenger touchscreen, door operator and locks, closed-circuit TV camera and miscellaneous sensors.

Instrumentation cables run between the bogie and the passenger touchscreen and various sensors.

The bogie includes the transceiver used for communication with other J pods, switches, and loading stations.

Infrastructure Spaces

Room shall be available outside of the passenger compartment but inside of the space envelop to install components to support JPod operation

Power Source

  1. 48 VDC battery pack, accessible from outside of the JPod chassis
  2. Backup/bridging batteries from instrumentation and radio
  3. Battery charging connections

HVAC

  1. Heat pump with fan. (optional: air cooling)
  2. Ductwork from heat pump into passenger compartment

Controls

  1. Power & signal wiring

Exterior Features

  1. The chassis shall hang from two supports, one front and one rear.
  2. The chassis shall have two lateral stabilizer arms, one on each side, with rollers that will run along small guide rails adjacent to the main JPod bogie rail..
  3. The front and the rear of the chassis shall have bumpers to permit pushing the JPod along the rail by a rescue JPod.
  4. The top of the chassis shall have provisions for mounting sensors to detect RFID tags installed along the main rail.  
  5. The chassis exterior surfaces shall not crack or craze due to exposure to weather conditions over the temperature range of -40°F to 110°F.  This includes direct sunlight, snow, hail, and high winds.
  6. The chassis shall have exterior, decorative lights.

Operational Functions

  1. The chassis shall be rainproof with its windows and door closed.
  2. The lateral support arms shall resist wind loads up to 90 mph without permanent deformation.
  3. The chassis structure shall be able to support combined chassis and payload weight of 1700 pounds.
  4. The chassis and its structure shall not develop any fatigue cracking when exposed to unlimited number of 0.4g starts and stops.
  5. The power budget for the bogies is 4.5 kWe.  All remaining electrical consumption must be less than or equal to 2.5 kWe.
  6. Passenger compartment temperature is permitted to vary between 64°F and 80°F, depending upon outside temperature extremes and sunlight intensity.

Images of passenger envelop:

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Images of various styles of vehicles:

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