CA1137586A - Device for automatically monitoring the charge state of power supplies independently of the mains system - Google Patents
Device for automatically monitoring the charge state of power supplies independently of the mains systemInfo
- Publication number
- CA1137586A CA1137586A CA000325742A CA325742A CA1137586A CA 1137586 A CA1137586 A CA 1137586A CA 000325742 A CA000325742 A CA 000325742A CA 325742 A CA325742 A CA 325742A CA 1137586 A CA1137586 A CA 1137586A
- Authority
- CA
- Canada
- Prior art keywords
- unit
- monitoring
- signal
- answering
- interrogating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/123—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Power Engineering (AREA)
- Traffic Control Systems (AREA)
- Alarm Systems (AREA)
- Mobile Radio Communication Systems (AREA)
- Emergency Alarm Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
ABSTRACT
The invention relates to a device for automatically monitoring the charge state of a power supply which is independent of the mains system. To this end, a monitoring sensor is associated with the power supply, which is in the form of primary batteries or accumulators charged by solar cells, the said sensor having a threshold response for the release of a warning signal, the said threshold being located at a specifically adjustable value above the minimal voltage required for trouble-free operation. The result of the voltage measurement, carried out at each interrogation of the interrogating unit, is passed to a message register as a monitoring signal.
The invention relates to a device for automatically monitoring the charge state of a power supply which is independent of the mains system. To this end, a monitoring sensor is associated with the power supply, which is in the form of primary batteries or accumulators charged by solar cells, the said sensor having a threshold response for the release of a warning signal, the said threshold being located at a specifically adjustable value above the minimal voltage required for trouble-free operation. The result of the voltage measurement, carried out at each interrogation of the interrogating unit, is passed to a message register as a monitoring signal.
Description
3~3758~
The invention relates to a device for automatically monitoring the charge state of a power supply, independently of the mains system, for an answering unit, in an installation for determining the location of traffic units, which is in radio contact with an interrogation unit installed in the said traffic unit.
Spot position-finding systems, such as are used, for example, for locating traffic units, consist essentially of two units, namely an interro-gating unit and an answering unit (transponder). The interrogating unit is generally powered by the traffic-unit electrical system. Obtaining power from a current network for answering units requires a very elaborate install-ation. It is therefore proposed to operated these units from primary bat-teries or accumulators charged by solar cells. ~reakdowns in the power supply, for example discharged batteries, are detected by failure of the answering device to transmit data and may be determined only by a plausibility check of tne sequence of answering-unit data in a central station. This does not indicate the statufi of the battery between fully charged and fully discharged. The load on the answering-unit battery will vary according to traffic density in a given area. For example, answering units at intersect-ions and traffic circles will be interrogated more frequently than those on one-way ~treets.
It is the purpose of the invention to provide, for an installation of this kind for locating traffic units, a device for automatically monitor-ing the charge state of the power supply, independently of a mains syste the answering unit.
According to the invention there is provided a device for auto-matically monitoring the charge state of a power supply, independently of a mains system, for an an8wering unit in an installation for determining .6 . ~!
~3~ 36 the location of traffic units~ which is in radio contact with an interrogat-ion unit installed in the traffic unit, characterized by the Eollowing features:
- a power supply, consisting of primary batteries or accumulators charged by means of solar cells, is connected to a monitoring sensor having a response threshold voltage for the release of a warnlng signal, said response threshold being set to a value above a minimal voltage necessary for trouble-free operation of said interrogation unit - the monitoring sensor is connected to a message 1~ register to which the result of a voltage measurement carried out at each interrogation of the interrogating unit is fed as a monitoring signal, - the message register contains a device in which the monitoring signal is added in coded form to a message containing section data transmitted by the answering unit to the interrogating unit.
In this connection, the monitoring signal is added, preferably in code, to the message transmitted by the answering unit to the interrogating unit and containing the section data, or is requested by the answering unit, by means of a separate interrogating signal, from a service car.
The invention is explained hereinafter in greater detail, in con-~unction with an example of embodiment illustrated in the drawing attached hereto, wherein:
Plgure 1 is a graphic representation oE the pattern of battery vol-tage over a period of time;
Figure 2 ifi a monitoring circuit in the answering unit;
Figure 3 is a message from the answering unit.
In the diagram in Figure 1, battery voltage UB is shown as a func-tion of operating time, i.e. time t. It is assumed in this connection that the battery delivers an almost constant voltage over an operating period --2~
~L~37~}6 t of at least S years. Thereafter a sharp drop in voltage occurs. Two points are marked in the descendlng part of ~he voltage curve, namely UB
alarm and UB min. These points are separated, in relation to the time axis, by an interval ~ t ~ 1 month. This value is assumed for long-life batteries with low power-loading. The value UB alarm is the voltage at which a warn-ing signal is given. This voltage may be adjusted to provide enough time before the voltage drops to the value UB min., after which reliable operation of the installation is no longer possible. Within the period ~t, the bat-tery in the answering unit is replaced. This ensures optimal battery utili-zation and simplifies maintenance. It also provides a considerable increase in operating reliability and total system availability.
-2a-Figure 2 shows the battery-monitoring circuit in the answering unit.
A transistor Ts is connected, through terminals ~ UB and 0, in parallel with the battery, with a voltage divider consisting of resistors R2 and R3 in the base circuit, a zener diode Z in series with the resistor R2, and a resistor Rl in the collector circuit. A lead runs from the collector of transistor Ts to a message register TR. A monitoring signal passes through line L to the message register. The component valves of the monitoring circuit are such that the transistor shuts off when voltage UB warning is reached. Thus a signal indicating the level o the battery voltage is derived from the presence or absence of current through the transistor.
The monitoring signal is added, in message register TR, to the answering-unit message. Figure 3 shows a message of~this kind, consisting of a plurality of adjoining blocks, namely synchronization symbol SynZ, answering-unit data AGD, monitoring symbol UZ, and a check symbol KZ. A
message of this kind is sent to the interrogating unit for each interroga-tion. Thus the result of the battery-voltage measurement, carried out at each interrogation, is contained in each message from the answering unit.
The central station is thus kept informed at all times of any possible battery-voltage problems.
As a partial modification, the monitoring signal may also be re-quested, by the answering unit, by means of a special interrogating signal, from a service car.
The battery monitoring according to the invention is not restrict-ed to applications where the answering unit is stationary and transmits section data; it may also be used with systems which transmit vehicle data to stationary interrogating units.
The invention relates to a device for automatically monitoring the charge state of a power supply, independently of the mains system, for an answering unit, in an installation for determining the location of traffic units, which is in radio contact with an interrogation unit installed in the said traffic unit.
Spot position-finding systems, such as are used, for example, for locating traffic units, consist essentially of two units, namely an interro-gating unit and an answering unit (transponder). The interrogating unit is generally powered by the traffic-unit electrical system. Obtaining power from a current network for answering units requires a very elaborate install-ation. It is therefore proposed to operated these units from primary bat-teries or accumulators charged by solar cells. ~reakdowns in the power supply, for example discharged batteries, are detected by failure of the answering device to transmit data and may be determined only by a plausibility check of tne sequence of answering-unit data in a central station. This does not indicate the statufi of the battery between fully charged and fully discharged. The load on the answering-unit battery will vary according to traffic density in a given area. For example, answering units at intersect-ions and traffic circles will be interrogated more frequently than those on one-way ~treets.
It is the purpose of the invention to provide, for an installation of this kind for locating traffic units, a device for automatically monitor-ing the charge state of the power supply, independently of a mains syste the answering unit.
According to the invention there is provided a device for auto-matically monitoring the charge state of a power supply, independently of a mains system, for an an8wering unit in an installation for determining .6 . ~!
~3~ 36 the location of traffic units~ which is in radio contact with an interrogat-ion unit installed in the traffic unit, characterized by the Eollowing features:
- a power supply, consisting of primary batteries or accumulators charged by means of solar cells, is connected to a monitoring sensor having a response threshold voltage for the release of a warnlng signal, said response threshold being set to a value above a minimal voltage necessary for trouble-free operation of said interrogation unit - the monitoring sensor is connected to a message 1~ register to which the result of a voltage measurement carried out at each interrogation of the interrogating unit is fed as a monitoring signal, - the message register contains a device in which the monitoring signal is added in coded form to a message containing section data transmitted by the answering unit to the interrogating unit.
In this connection, the monitoring signal is added, preferably in code, to the message transmitted by the answering unit to the interrogating unit and containing the section data, or is requested by the answering unit, by means of a separate interrogating signal, from a service car.
The invention is explained hereinafter in greater detail, in con-~unction with an example of embodiment illustrated in the drawing attached hereto, wherein:
Plgure 1 is a graphic representation oE the pattern of battery vol-tage over a period of time;
Figure 2 ifi a monitoring circuit in the answering unit;
Figure 3 is a message from the answering unit.
In the diagram in Figure 1, battery voltage UB is shown as a func-tion of operating time, i.e. time t. It is assumed in this connection that the battery delivers an almost constant voltage over an operating period --2~
~L~37~}6 t of at least S years. Thereafter a sharp drop in voltage occurs. Two points are marked in the descendlng part of ~he voltage curve, namely UB
alarm and UB min. These points are separated, in relation to the time axis, by an interval ~ t ~ 1 month. This value is assumed for long-life batteries with low power-loading. The value UB alarm is the voltage at which a warn-ing signal is given. This voltage may be adjusted to provide enough time before the voltage drops to the value UB min., after which reliable operation of the installation is no longer possible. Within the period ~t, the bat-tery in the answering unit is replaced. This ensures optimal battery utili-zation and simplifies maintenance. It also provides a considerable increase in operating reliability and total system availability.
-2a-Figure 2 shows the battery-monitoring circuit in the answering unit.
A transistor Ts is connected, through terminals ~ UB and 0, in parallel with the battery, with a voltage divider consisting of resistors R2 and R3 in the base circuit, a zener diode Z in series with the resistor R2, and a resistor Rl in the collector circuit. A lead runs from the collector of transistor Ts to a message register TR. A monitoring signal passes through line L to the message register. The component valves of the monitoring circuit are such that the transistor shuts off when voltage UB warning is reached. Thus a signal indicating the level o the battery voltage is derived from the presence or absence of current through the transistor.
The monitoring signal is added, in message register TR, to the answering-unit message. Figure 3 shows a message of~this kind, consisting of a plurality of adjoining blocks, namely synchronization symbol SynZ, answering-unit data AGD, monitoring symbol UZ, and a check symbol KZ. A
message of this kind is sent to the interrogating unit for each interroga-tion. Thus the result of the battery-voltage measurement, carried out at each interrogation, is contained in each message from the answering unit.
The central station is thus kept informed at all times of any possible battery-voltage problems.
As a partial modification, the monitoring signal may also be re-quested, by the answering unit, by means of a special interrogating signal, from a service car.
The battery monitoring according to the invention is not restrict-ed to applications where the answering unit is stationary and transmits section data; it may also be used with systems which transmit vehicle data to stationary interrogating units.
Claims (2)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A device for automatically monitoring the charge state of a power supply, independently of a mains system, for an answering unit in an installation for determining the location of traffic units, which is in radio contact with an interrogation unit installed in the traffic unit, characterized by the following features:
- a power supply, consisting of primary batteries or accumulators charged by means of solar cells, is connected to a monitoring sensor having a response threshold voltage for the release of a warning signal, said response threshold being set to a value above a minimal voltage necessary for trouble-free operation of said interrogation unit - the monitoring sensor is connected to a message register to which the result of a voltage measurement carried out at each interrogation of the interrogating unit is fed as a monitoring signal, - the message register contains a device in which the monitoring signal is added in coded form to a message containing section data transmitted by the answering unit to the interrogating unit.
- a power supply, consisting of primary batteries or accumulators charged by means of solar cells, is connected to a monitoring sensor having a response threshold voltage for the release of a warning signal, said response threshold being set to a value above a minimal voltage necessary for trouble-free operation of said interrogation unit - the monitoring sensor is connected to a message register to which the result of a voltage measurement carried out at each interrogation of the interrogating unit is fed as a monitoring signal, - the message register contains a device in which the monitoring signal is added in coded form to a message containing section data transmitted by the answering unit to the interrogating unit.
2. A device according to claim 1, characterized in that the monitor-ing signal is requested from a service car, by the answering unit, by means of a special interrogating signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2816781.9 | 1978-04-18 | ||
| DE2816781A DE2816781C2 (en) | 1978-04-18 | 1978-04-18 | Device for automatic monitoring of the charge status of mains-independent power supplies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1137586A true CA1137586A (en) | 1982-12-14 |
Family
ID=6037299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000325742A Expired CA1137586A (en) | 1978-04-18 | 1979-04-18 | Device for automatically monitoring the charge state of power supplies independently of the mains system |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0004969B1 (en) |
| JP (1) | JPS5823775B2 (en) |
| AT (1) | AT367253B (en) |
| AU (1) | AU524813B2 (en) |
| CA (1) | CA1137586A (en) |
| DE (1) | DE2816781C2 (en) |
| DK (1) | DK151655C (en) |
| ES (1) | ES479640A1 (en) |
| FI (1) | FI791240A (en) |
| NO (1) | NO791253L (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2855809C2 (en) * | 1978-12-22 | 1980-06-19 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Device for automatic monitoring of the state of charge of a network-independent power supply and the humidity in the response device of a system for determining the location of traffic facilities |
| JP2830612B2 (en) * | 1992-04-28 | 1998-12-02 | 日本電気株式会社 | Call control system |
| DE102011120891A1 (en) * | 2011-12-10 | 2013-06-13 | Dräger Medical GmbH | Method for supplying a medical device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1574122B1 (en) * | 1967-09-19 | 1971-12-02 | Prolectron | CONTROL SYSTEM FOR ROAD-BASED VEHICLES ACCORDING TO THE SCHEDULE |
| DE2022447A1 (en) * | 1970-05-08 | 1971-11-18 | Keller Hans Dipl Ing | Battery control procedures for photographic cameras |
| DE2136321B2 (en) * | 1971-07-21 | 1980-01-03 | Robert Bosch Gmbh, 7000 Stuttgart | Methods for monitoring vehicles |
| DE2558805A1 (en) * | 1975-12-27 | 1977-07-07 | Teves Gmbh Alfred | Electronic battery voltage monitor for motor vehicles - uses Zener diode matched to required battery volts and has transistor switch with light diode indicator |
-
1978
- 1978-04-18 DE DE2816781A patent/DE2816781C2/en not_active Expired
-
1979
- 1979-04-11 NO NO791253A patent/NO791253L/en unknown
- 1979-04-17 DK DK157479A patent/DK151655C/en not_active IP Right Cessation
- 1979-04-17 AU AU46114/79A patent/AU524813B2/en not_active Ceased
- 1979-04-17 ES ES479640A patent/ES479640A1/en not_active Expired
- 1979-04-17 FI FI791240A patent/FI791240A/en not_active Application Discontinuation
- 1979-04-17 AT AT0284079A patent/AT367253B/en not_active IP Right Cessation
- 1979-04-17 EP EP79101175A patent/EP0004969B1/en not_active Expired
- 1979-04-18 CA CA000325742A patent/CA1137586A/en not_active Expired
- 1979-04-18 JP JP54046771A patent/JPS5823775B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ATA284079A (en) | 1981-10-15 |
| JPS54142094A (en) | 1979-11-05 |
| EP0004969A1 (en) | 1979-10-31 |
| AU524813B2 (en) | 1982-10-07 |
| FI791240A (en) | 1979-10-19 |
| AU4611479A (en) | 1979-10-25 |
| ES479640A1 (en) | 1979-11-01 |
| NO791253L (en) | 1979-10-19 |
| DK151655B (en) | 1987-12-21 |
| JPS5823775B2 (en) | 1983-05-17 |
| DK157479A (en) | 1979-10-19 |
| EP0004969B1 (en) | 1982-07-28 |
| DE2816781C2 (en) | 1979-12-20 |
| DK151655C (en) | 1988-05-30 |
| DE2816781B1 (en) | 1979-04-26 |
| AT367253B (en) | 1982-06-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |