Monitoring annunciator apparatus

• US 4,774,510 A
• Filed: 05/09/1986
• Issued: 09/27/1988
• Est. Priority Date: 05/09/1986
• Status: Expired due to Fees

• Current Assignee: Electrocon Incorporated
• Original Assignee: Electrocon Incorporated
• Inventors: Steinke, Thomas O.
• Primary Examiner(s): Safourek, Benedict V.
• Assistant Examiner(s): Smith, Ralph E.
• Application Number:
  US06/861,440
• Time in Patent Office: 872 Days
• Field of Search: 340/825.06, 340/825.07, 340/825.15, 340/825.16, 340/825.17, 340/870.16, 340/870.39, 340/501, 340/502, 340/506, 340/514, 340/524, 340/525 , 340/635, 340/644, 340/650, 340/652
• US Class Current: 340/3.42
• CPC Class Codes: G08B 25/14 Central alarm receiver or annunciator arrangements
• CPC Class Codes: G08B 29/10 Monitoring of the annunciator circuits

Abstract

A monitoring annunciator apparatus for monitoring the status of field contact points, which apparatus cooperates with one or more contact points utilizing a single signal wire for each monitored point and a ground wire common to all monitored points, so as to provide separate audible and visual indication, or alternative actuation of a response, upon the occurrence of a change in status of each monitored field contact point and indication of the occurrence of change in the integrity of each wire pair. A microprocessor driven circuit sequentially selects and connects each field contact point to be monitored and tests each field contact point and associated line means at varying voltages the results of which are transformed into a digital logic signal which the microprocessor converts into logic signals to generate audible and visual indication of the status of each of said contact points and associated wire pair on a display or otherwise command that action be taken towards returning said contact points and wire pairs to normal status.

Claims

1. A monitoring annunciator apparatus for monitoring the status of field contact points, which apparatus cooperates with one or more contact points utilizing a single wire for each monitored contact point and a wire common to all monitored contact points so as to detect the occurrence of a change in status of each monitored field contact point and the occurrence of a change in the integrity of each wire pair to provide notification towards implementation of corrective measures in response thereto, said monitoring annunciator apparatus comprising:

two or more line terminator means, at least two of said two or more line terminator means are each operably and electrically connected to respective ones of said field contact points, each of said at least two line terminator means having a first end and a second end, with said first end being operably and electrically connected to said respective field contact point;

at least two dedicated signal wire means, each operably and electrically associated with a respective one of said at least two line terminator means, each of said at least two dedicated signal wire means having a first end and a second end with said first end of said respective dedicated signal wire means being operably and electrically connected to said second end of said respective one of said at least two line terminator means;

common ground wire means operably and electrically connected to said at least two line terminator means, said common ground wire means having a first end and a second end with said first end of said common ground wire means being operably and electrically connected to said second ends of said at least two line terminator means;

switch means associated with said respective ones of said field contact points, said switch means having a first end and a second end where said first end is operably and electrically connected respectively to each second end of said dedicated signal wire means, for selectively electrically connecting a desired one of said respective ones of said field contact points, and associated ones of said respective line terminator means to said monitoring annunciator apparatus;

switch select means operably and electrically connected to said switch means for enabling a desired switch means to, in turn, connect a particular field contact point and associated respective line terminator means to said monitoring annunciator apparatus;

sensor power means operably and electrically connected to said second end of said switch means for supplying selectable voltages via said respective dedicated signal wire means and common ground wire means to respective ones of said field contact points and associated line terminator means to, in turn, enable said monitoring annunciator apparatus to determine the status of said selected field contact point and the integrity of said associated dedicated signal wire means and common ground wire means;

test means operably and electrically connected to said second end of said switch means, said test means serving to generate a digital logic signal in response to the application of voltages generated by said sensor power means to said respective field contact point and associated line terminator means, via said respective dedicated signal wire means and common ground wire means;

line monitor processor means operably and electrically connected to said switch select means, said sensor power means and test means;

said line monitor processor means providing logic signals to said switch select means to select, and thereby connect a desired field contact point and associated line terminator means and respective dedicated signal wire means and common ground wire means to said monitoring annunciator apparatus;

said line processor means further providing logic signals to said sensor power means to sequentially select said predetermined voltages to be applied to said field contact points and associated line terminator means;

said line monitor processor means further receiving digital logic signals from said test means to, in turn, permit the determination of the occurrence of a change of status and integrity of said field contact point and said respective dedicated signal wire means and common ground wire means in response to the status of said field contact point and respective dedicated signal wire means and common ground wire means logic signals;

information processor means operably and electrically connected to said line monitor processor means for transmitting information to alternatively provide notification and implement corrective measures devices in response to said logic signals received from said line monitor processor means;

information reception means operably and electrically connected to said information processor means for receiving and otherwise reacting to the status of each of said monitored field contact points and the condition of each corresponding respective dedicated signal wire means and common ground wire means connecting said annunciator apparatus to said field contact points so as to alternatively provide said notification of and implement corrective actions to said annunciator apparatus;

whereby a change in the status of each respective field contact point and a change in the integrity of each respective associated dedicated signal wire means and common ground wire means is detected by said test means as a function of the application of voltages generated by said sensor power means as applied to the selected connection of each field contact point and associated line terminator means.

2. The monitoring annunciator means according to claim 1 in which said invention further comprises line conditioning means operably and electrically connected respectively to the dedicated signal wire means for isolating said monitoring annunciator apparatus from electrical power surge interference.

3. The invention according to claim 2 in which said line conditioning means comprises a resistor connected between the respective second ends of said dedicated signal wire means and first ends of said switch means.

4. The invention according to claim 3 in which said line conditioning means further comprises a metal oxide veristor operably and electrically connected between each of said first ends of said switch means and a common ground.

5. The monitoring annunciator apparatus according to claim 1 in which said inventon further comprises filter means operably and electrically interposed between the second end of said switch means and said test means, for providing a stable noise-free signal to said monitoring annunciator apparatus and isolating said apparatus from undesirable electrical and magnetic interference.

6. The invention according to claim 5 in which said filter means comprises an active low pass filter having a twenty Hz cut off, said low pass filter serving to provide AC transient protection by removing electrically and magnetically induced interference which would otherwise be transmitted by said respective dedicated signal wire means to said monitoring annunciator apparatus to, in turn, preclude the rendering of said monitoring annunciator apparatus inoperative.

7. The invention according to claim 1 in which each of said at least two of said two or more line terminator means includes;

a first terminal and second terminal operably and electrically attached to said dedicated signal wire means and said common ground wire means, respectively, of said first end of said line terminator means,

a third terminal and a fourth terminal operably and electrically attached to said dedicated signal wire means and said common ground wire means, respectively, of said second end of said line terminator means;

said first terminal, a first resistor and a first diode and said second terminal operably and electrically connected in series to thereby form a first circuit portion;

said third terminal, a second resistor and a second diode and said forth terminal operably and electrically connected in series to thereby form a second circuit portion;

said first circuit portion and said second circuit portion being connected in parallel whereby the occurrence of a change in the status of said respective contact point attached between said first and second terminals and occurrence of change in the integrity of said respective dedicated signal wire means and common ground wire means attached to said third and fourth terminals may be detected by said monitoring annunciator apparatus.

8. The invention according to claim 1 in which said dedicated signal wire means and common ground wire means are fabricated of 16 gauge wire.

9. The invention according to claim 1 in which said switch means comprises a plurality of addressable analog switch modules each having an input side, an output side and plurality of address lines, where a single switch within each of said modules may be enabled, and alternatively disabled, by the input of a predetermined address code generated by said line monitor processor means to said address lines of said switch modules.

10. The invention according to claim 9 in which said switch select means further comprises a multiplexer having an input side and an output side where a specific address code generated by said line monitor processing means is provided to said multiplexer to thereby cause a desired switch module to be enabled to, in turn, cause a single desired contact point, associated line terminator means and respective dedicated signal wire means and common ground wire means to be selected for testing.

11. The invention according to claim 1 in which said sensor power means comprises a voltage source capable of selectably and alternatively providing a positive five volt, a negative five volt and a zero volt output in response to digital logic signals received from said line monitor processor means.

12. The invention according to claim 1 in which said test means comprises a plurality of comparitors each of which produces a digital logic signal output upon detecting an applied voltage to, in turn, indicate the presence or absence of an associated predetermined voltage.

13. The invention according to claim 1 in which said line monitor processor means comprises a self contained microprocessor and memory assembly for generating logic signals in response to an internally stored computer program and for accepting digital logic input from said test means towards producing logic signals under command of said computer program, to thereby signal said information processor means.

14. The invention according to claim 13 in which said information processor means comprises a display processor and memory assembly which, upon receipt of said logic signals, causes said information reception means to notify the status of each of said field contact points and the status of each of said respective dedicated signal wire means and common ground wire means.

15. The invention according to claim 14 in which said information reception means comprises a display panel for providing separate audible and visual indication of the status of each monitored field contact point and respective dedicated signal wire means and common ground wire means.

16. The invention according to claim 15 in which said display panel comprises an alarm horn and a red lamp, a yellow lamp, a green lamp and a legend plate for each monitored field contact point where said lamps are illuminated in response to command signals received from said display processor means,

where said legend plate bears indicia identifying said field contact point,

where the flashing illumination of said red lamp and sounding of said alarm horn signifies an alarm condition indicating a change in the status of said field contact point,

where the constant illumination of said red lamp and silencing of said alarm horn indicates that said alarm condition has been acknowledged but remains uncorrected,

where the flashing illumination of said yellow lamp and sounding of said alarm horn signifies a line alarm condition indicating a change in the integrity of one or more of said respective dedicated signal wire means and common ground wire means,

where the constant illumination of said yellow lamp and silencing of said alarm horn indicates that said line alarm condition has been acknowledged but remains uncorrected, and

where the illumination of said green lamp signifies a normal condition indicating that no change in the status of said field contact point has occurred.

17. The invention according to claim 16 in which said red lamp, said yellow lamp and said green lamp are placed behind a translucent legend plate corresponding to each field contact point such that the indicia appearing on said legend plate will glow in color indicating the status of said field contact point and associated dedicated signal wire means and common ground wire means.

18. The invention according to claim 15 in which said display panel further comprises a digital display, a first LED, and a second LED,

said digital display being activated upon the occurrence of a line alarm condition to provide an identification of which of said dedicated signal wire means and common ground wire means associated with said field contact point is detected by said line monitor processor means as experiencing said line alarm condition to thus permit the individual identification of field contact points and associated dedicated signal wire means and common ground wire means in the event that multiple alarm conditions occur;

said first LED being illuminated upon the occurrence of a line alarm condition to further identify said alarm condition as resulting from an open circuit in said respective dedicated signal wire means and common ground wire means identified on said digital display;

said second LED being illuminated upon the occurrence of a line alarm condition to further identify said line alarm condition as resulting from a short circuit in said respective dedicated signal wire means and common ground wire means identified on said digital display.

19. The invention according to claim 1 in which said information reception means comprises a communication device capable of generating additional signals to actuate remote notification of the change in status and integrity of the monitored contact points and dedicated signal wire means and common ground wire means to, in turn, actuate implementation of corrective measures to return the status of said monitored contact points to a normal condition.

20. The invention according to claim 1 in which said monitoring annunciator apparatus further includes back-up power supply means comprising rechargable batteries for providing electrical power in the event of a failure of said sensor power means to thus permit continued operation of said monitoring annunciator apparatus.