Wireless damper testing and control system

Abstract

A wireless damper control and test system comprising a wireless controller for communicating with a wireless interface using an identifier whereby actuation timing of a damper actuator is transmitted by signal, the wireless interface connected to a damper to be controlled or tested using the transmitted signal, the wireless controller transmits the signals to the wireless interface for operational verification of the damper and damper actuator, and the wireless interface detects a damper state by contacts mounted on the damper and communicates the damper state to the wireless controller.

Claims

1. A method for controlling a damper comprising: generating a radio frequency query signal from a handheld controller; receiving a plurality of radio frequency response signals from a plurality of dampers in response to the radio frequency query signal; generating a user-selectable display identifying the plurality of dampers based on the received plurality of radio frequency response signals; receiving a user selection of one of the plurality of dampers; transmitting a test control to the selected damper, wherein the test control is configured to activate a test circuit of the selected damper; receiving a response from the selected damper, wherein the response is generated based on whether a reading has been received from a contact of the test circuit; and generating a user display showing the response, wherein the response includes a pass or a fail message.

2. The method of claim 1 wherein the test control comprises a blade position test control.

3. The method of claim 1 wherein the test control comprises a switch contact test control.

4. The method of claim 1 wherein the test control comprises a smoke alarm test control.

5. The method of claim 1 wherein the test control comprises a relay position test control.

6. The method of claim 1 further comprising: receiving the test control at the selected damper; and activating a selected component in response to the test control.

7. The method of claim 1 further comprising: receiving the test control at the selected damper; and activating a relay in response to the test control.

8. The method of claim 1 further comprising: receiving the test control at the selected damper; activating a relay in response to the test control; and determining whether the reading has been received from the contact.

9. The method of claim 1 further comprising: receiving the test control at the selected damper; activating a relay in response to the test control; determining whether the reading has been received from the contact; and generating the fail message if the reading has not been received.

10. The method of claim 1 further comprising: receiving the test control at the selected damper; activating a relay in response to the test control; determining whether the reading has been received from the contact; and generating the pass message if the reading has been received.

11. The method of claim 1 further comprising: receiving the test control at the selected damper; activating a smoke alarm test circuit in response to the test control; determining whether the reading has been received from the smoke alarm test circuit; and generating the fail message if the reading has not been received.

12. The method of claim 1 further comprising: receiving the test control at the selected damper; activating a smoke alarm test circuit in response to the test control; determining whether the reading has been received from the smoke alarm test circuit; and generating the pass message if the reading has been received.

13. The method of claim 1, wherein receiving the user selection includes receiving a scan control for each of the plurality of dampers, and the method further comprising: transmitting the test control to each of the plurality of dampers; receiving the response from the each of the plurality of dampers; and generating the user display showing the plurality of responses.

14. The method of claim 1, wherein the reading comprises an indication from a contact switch configured to identify a blade position of the selected damper.

15. The method of claim 1, wherein the test circuit is configured to test a position of a blade of the selected damper, wherein the position includes an open position, a closed position, or both.

16. A method for controlling a damper comprising: generating a radio frequency query signal from a handheld controller; receiving a plurality of radio frequency response signals from a plurality of dampers; generating a user-selectable display identifying the plurality of dampers; receiving a user selection of one of the plurality of dampers; transmitting a test control to the selected damper; receiving a response from the selected damper; generating a user display showing the response; receiving the test control at the selected damper; activating a relay in response to the test control; determining whether a reading has been received from one or more contacts in response to activating the relay; generating a fail message if the reading has not been received; and generating a pass message if the reading has been received; wherein the test control comprises one or more of a blade position test control, a switch contact test control, a smoke alarm test control, and a relay position test control.

17. A method for testing a damper system, comprising: transmitting, with a controller, a radio frequency query signal to a plurality of dampers within range of the controller; receiving, with the controller, a radio frequency response signal from a damper of the plurality of dampers in response to the radio frequency query signal; transmitting a test signal to the damper with the controller, wherein the test signal is configured to: activate a test function of the damper, wherein the test function includes movement of a blade of the damper; and generate a test response based on whether a reading from a contact switch is received by a test circuit of the damper, wherein the test response corresponds to an outcome of the test function, wherein the reading of the contact switch indicates a position of the blade of the damper; receiving the test response with the controller; and displaying a result of the test function based on the test response.

18. The method of claim 17, wherein the result includes a pass indicator or a fail indicator.

19. The method of claim 17, wherein the test function is configured to cycle movement of the blade of the damper to an open position and a closed position and to return the blade to an initial position.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The accompanying drawings, which are incorporated in and form a part of the specification, illustrate preferred embodiments of the present invention, and together with a description, serve to explain the principles of the invention.

(2) FIG. 1 is a perspective view of the device installed in a damper sleeve.

(3) FIG. 2 is a perspective view of the device installed on a duct.

(4) FIG. 3 is a schematic detail of the wireless damper interface.

(5) FIG. 4 is a front view of the remote wireless device.

(6) FIG. 5 is a flow chart showing system operation.

(7) FIG. 6 is an electrical schematic for the damper system.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

(8) The inventive system is a standalone wireless system with direct two way communication or indirect mesh communication to satisfy the requirement of manually controlling or testing the functionality of critical application products. In use, personnel responsible for inspection will walk through a building with the wireless remote controller. The handheld controller automatically locates devices within RF range when utilized for direct communication and provides a selectable list to a user on a liquid crystal display. When indirect communication is utilized, the handheld controller provides a selectable list to a user on a liquid crystal display of all devices communicating by mesh network indirectly.

(9) The inventive device can be programmed to sort devices by any desired category including by building name or floor(s) for example. When manual verification testing is complete the tool provides a test report by USB with time stamp and PASS or FAIL message for each interrogated device.

(10) A wireless damper interface is located next to the critical application device and is wired to the actuator's electrical circuit. The wireless damper interface includes a wireless transceiver for communication, switch contacts to indicate blade position, smoke alarm contact, and a relay to position the connected actuator.

(11) The remote handheld controller sends test request information to individual devices with the preprogrammed actuator timing. After receiving the test information the wireless interface cycles the device being tested to verify operation by reading the blade indication switch contacts. The wireless interface then responds with information to the remote handheld controller with the PASS or FAIL message with error code information. A FAIL message is displayed on the LCD display.

(12) FIG. 1 is a perspective view of the device installed in a damper sleeve. Interface 100 is mounted to a duct (D) or other suitable mounting surface (S). Interface 100 is connected to junction box 200 which contains the switch contacts and power terminations. Junction box 200 is connected to a damper actuator 300. Junction box 200 may be a pass through for power and switch field connections when the applicable code requires a separate box for such terminations, or it may include internal switch components and/or thermal links. When damper actuator 300 is equipped with internal switches, junction box 200 is not required. When junction box 200 is not required, power and switch wiring may terminate directly to the wireless damper interface (100) enclosure.

(13) FIG. 2 is a perspective view of the device installed on a duct. The switch package contains contact switches that send a signal when the damper is in the open or closed position. Switches may also be included in the damper actuator. Such switches are well known in the art.

(14) An access door AC may be provided in the duct for accessing the interior of the duct as well as the damper vanes.

(15) FIG. 3 is a schematic detail of the wireless damper interface. Interface 100 comprises antenna 101 for receiving RF signals from the portable controller. Actuator power 102 is connected to actuator 300. Switch leads 103 are connected to the damper switch package 400 or to the switches included in the actuator 300. Building power 104 is connected to the interface 100.

(16) FIG. 4 is a front view of the wireless portable controller. Each interface 100 is encoded with a unique address that identifies that particular damper. While surveying a building, the portable controller 500 pings each interface 100. A list of dampers that reply identified by tag and location are displayed on the portable controller LCD visual screen or display 502. Each damper can then be tested using the portable controller 500. Further, new dampers can be added to the roster of active dampers.

(17) All test data is stored in the portable controller for upload to a computer or tablet.

(18) Controller 500 comprises a case 501 and LCD display 502. A keyboard 503 is provided by which a user operates the system. The keys comprise navigation arrows 504, an enter key 505, a return key 506 and a home key 507. Key 508 is for on/off.

(19) The controller is capable of automatic synchronized communication. The system frequency is selected as may be appropriate for the system or installation or both, including but not limited to 2.4 GHz, 915 MHz, 902 MHz, 868.3 MHz or 315 MHz. The operating range of the system is approximately 90 feet with direct communication. When the controller incorporates indirect communication data is transmitted longer distances by hopping information between controllers until the information reaches the desired controller selected by the portable controller. For example, the mesh network technology may be based on 802.15.4-2011IEEE Standard for Local and metropolitan area networksPart 15.4: Low-Rate Wireless Personal Area Networks (LR-WPANs).

(20) Battery life is typically 21 hours of continuous operation with display LCD backlight. The system includes an automatic switchover between battery and USB. It further includes a USB connection to a PC for communication including generation of a spreadsheet test report.

(21) FIG. 5 is a flow chart showing system operation. When the portable controller is turned on 10, the introductory text 11 will display for approximately 5 seconds. The next screen 12 offers a menu of options for the user including Test Damper, Report to PC, Download Table, Other Apps. Selecting Test Damper displays the Scan Dampers screen 13. Selecting Report to PC displays the Uploading screen 14, which displays report to PC finished 17. Selecting the Download Table option displays the Downloading screen 15, which displays download table finished 18. Selecting the Other Apps option displays other options screen 16 which includes USB Transceiver, Sensor Monitor, Simulate Ctrl, Repeater.

(22) On screen 13 if Scan Dampers is selected this displays a wait prompt 20. An indication 21 is made if the system times out. If there is no time out, the identified dampers are listed with their respective tag names 22. The tag names are typically limited to 6 characters.

(23) The next screen queries the user to Perform Test 23. The device provides detailed damper information for the damper being tested 24. It also displays a Testing wait screen 25. In the absence of input a time out screen is displayed 26. If there is no time out a Test Result screen is displayed 27. If the test is failed then details are displayed 28.

(24) Returning to screen 13, the user may use a lookup table 29. If there is no table then screen 30 is displayed. The user may also download a table through screen 31. The table name is limited to 16 characters. The user can then scan the downloaded damper table 32.

(25) FIG. 6 is an electrical schematic for the damper system. Wireless interface 100 is connected to junction box 200. Junction box 200 is a pass through for switch and actuator field wiring. In some cases, junction box 200 may not be required. When the applicable code allows, the wiring from actuator 300 and position switches 400 may terminate inside damper interface 100. In other applications, when the actuator is equipped with internal damper blade indication switches, the switch and power wires may terminate inside the wireless damper interface 100 enclosures. Actuator power is provided by a 120/24 VAC transformer 601.

(26) Although a form of the invention has been described herein, it will be obvious to those skilled in the art that variations may be made in the construction and relation of parts without departing from the spirit and scope of the invention described herein.