EP1368730A2 - Circuit et procede pour predefinir un signal de depart destine a un controleur - Google Patents

Circuit et procede pour predefinir un signal de depart destine a un controleur

Info

Publication number
EP1368730A2
EP1368730A2 EP02721978A EP02721978A EP1368730A2 EP 1368730 A2 EP1368730 A2 EP 1368730A2 EP 02721978 A EP02721978 A EP 02721978A EP 02721978 A EP02721978 A EP 02721978A EP 1368730 A2 EP1368730 A2 EP 1368730A2
Authority
EP
European Patent Office
Prior art keywords
circuit
controller
signal
start signal
state
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.)
Withdrawn
Application number
EP02721978A
Other languages
German (de)
English (en)
Inventor
Michael Horbelt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1368730A2 publication Critical patent/EP1368730A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/36—Means for starting or stopping converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/005—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting using a power saving mode
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/18—Modifications for indicating state of switch
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Definitions

  • the invention relates to a circuit and a method for specifying a start signal, a controller being transferred from a first state to a second state depending on the start signal, the energy consumption of the controller being higher in the second state than in the first state according to the independent claims.
  • DE 196 45 944 AI shows a control device for an on-board network with at least two batteries that can be recharged by a generator and are used to supply various consumers.
  • the control device and thus the microcontroller it contains are supplied with information via various connections.
  • the control device or the included microcontroller can emit control signals via other connections.
  • the on-board power supply control unit opens or closes the connection between the two batteries and goes into sleep mode after being switched off. To wake up from sleep mode, a field effect transistor is switched through to start up the control unit by supplying a signal.
  • Control devices such as the on-board electrical system control device just described are generally sent to a standby or sleep mode on account of the quiescent current requirements or their quiescent current consumption, if this is not currently required or is not being used.
  • All of these control devices which can be set temporarily in a standby or sleep mode, irrespective of whether they are used in the vehicle or in another location, become cyclically active in a type of Pollmg operation. This applies above all to the controller and parts of the periphery. This makes it possible to record time-critical and other external events and signals, for example switch positions, during these active phases. Depending on this, the entire control unit is then reactivated or remains in sleep mode or standby mode. This procedure leads to a high current consumption of the control unit.
  • the invention is based on a method and a circuit for specifying a start signal, a controller being transferred from a first state, a standby or sleep mode m to a second state of an active nature depending on the start signal, the energy consumption of the controller being transferred in the second State is higher than in the first state.
  • the circuit has a clocked energy source, which outputs an energy signal in the context of this clock and the start signal is formed as a function of this energy signal.
  • the actual control device can even be switched off completely and only the wake-up circuit, ie the circuit, can be supplied with energy.
  • the quiescent energy consumption, in particular quiescent current consumption, of the wake-up circuit, which is caused by the use of the clocked is primarily relevant Energy source or a clocked energy signal can be reduced to a minimum.
  • a threshold switching means in particular a comparator, which is connected to the clocked energy source, advantageously results in a simple possibility of detecting the signal state.
  • a memory means with at least one memory cell is advantageously connected to the threshold switching means, the signal state can be preserved as the memory cell content and thus made more processable and comparable.
  • the memory means is designed as a shift register and the memory cell content is shifted in time with the clocked energy source, complex selection methods and comparison methods are possible, which ultimately result in the delivery of a start signal as a wake-up signal to the microcontroller.
  • a further storage means also in particular in the form of a register, especially in the form of a shift register, contains a certain storage content, in particular in the form of a bit pattern, and a start signal is triggered by comparing the bit patterns.
  • a simple evaluation means in the form of simple logic can advantageously be used for this purpose, this evaluation means being connected to the at least one storage means and outputting the start signal to the controller. It is also advantageously conceivable that if two storage means are used for comparison, a storage means in an active phase of the controller is filled with predefinable content by the controller, so that the controller itself can specify the start criteria.
  • the clocked energy source is preferably designed to be adjustable, so that the level of the energy signal output in the clock can be changed.
  • the use of such clocked, high-level energy signals then advantageously enables additional information to be obtained, which can be used, for example, for diagnostic purposes.
  • the level of the energy signal is advantageously carried out by an adjusting means, in particular a state machine, whereby a predeterminable change in the energy signal can be implemented.
  • a reference means can advantageously be provided by means of which the threshold value of the threshold value switching means can be changed.
  • FIG. 1 shows a wake-up circuit according to the invention in connection with possibilities of Input signal generation and connection to the controller.
  • Figure 2 shows the signal curve with a single-clocked energy source.
  • FIG. 3 shows, in a further embodiment, a circuit according to the invention with a plurality of signal connections and the option for changing the height of the energy signal.
  • the signal curve with high variation of the energy signal is shown in FIG. 4.
  • FIG. 5 shows a circuit according to the invention with reference means for varying the comparison threshold.
  • FIG. 1 shows a circuit 100 according to the invention with a controllable energy source, in particular a current source and a clocking means 103 combined in a clocked energy source 101.
  • the energy source can be a voltage source, a charge source, a current source, etc.
  • a power source is referred to below as the preferred embodiment.
  • the clocked current source 101 is connected to a threshold switching means, in particular a comparator 104, at the second input of which a reference threshold Ur is applied.
  • the threshold switching means 104 is in turn connected to a storage means 105, in particular a register, for example a shift register, the individual cells of which are designated by Z.
  • This storage means 105 in turn has a connection to an evaluation means 106, in particular a simple comparison logic.
  • 107 further storage means, in particular registers 108 and 109, which on the one hand can be located inside the evaluation means 106 or outside of it, but inside the circuit 100, via connection 112, the microcontroller or controller 110 receives a start signal or wake-up Signal transmitted.
  • the wake-up signal can also initially operate a switching means, which is not explicitly shown here and through which the energy supply of the controller 110 can be provided.
  • the switching means can be arranged externally or internally, based on the controller 110, or can also be part of 100.
  • the controller 110 is unidirectionally or bidirectionally connected to the optional registers 108 or 109 via connection 111, e.g. B. via a serial interface, e.g. SPI.
  • a switch 115 is connected to the input terminal 119 of the circuit 100, which switches via a consumer 120, in particular a resistor, with a voltage which corresponds in particular to the battery voltage in the vehicle, connected is.
  • the circuit 100 itself is also supplied with energy with a supply voltage Uv, where Uv can correspond to the battery voltage ü, can be formed therefrom or corresponds to an own energy supply.
  • controller 110 for example controller 110 or corresponding ground connections, are omitted since these are known and are not essential.
  • resistor 134 which represents parasitic resistances of switch 115, which arise, for example, from manufacturing inaccuracies, material properties or aging or wear of the switch.
  • a circuit is optionally shown, which likewise carries out a signal generation to the connection 119, with which a controllable energy source, in particular a controllable current source 118, is controlled from an analog circuit 117.
  • This circuitry may be in place of or in addition to switch 115.
  • the current source 102 is clocked by the clock generator 103.
  • the battery voltage and Ur the threshold value or here the reference voltage is represented by Ü.
  • switch 115 With switch 115 closed the voltage is applied to input 119.
  • pulse I of width tl to t2 is triggered by clock 103.
  • a voltage level U 1 is set, which differs from U n by the drop in the consumer 120 and in the internal resistance of the current source 102 or the parasitic resistor 114.
  • the voltage drop is at level U1, that is to say only slightly below the supply voltage.
  • the comparator Since the level Ul lies above the reference threshold Ur, the comparator, that is to say the threshold switching means 104, does not switch and a 0 is written into the cell of the register 105.
  • the clocked current source 101 again outputs a pulse I with the switch 115 closed, as a result of which a 0 is also written into the register here.
  • the register is expediently loaded with the same clock of the clock generator 103 as the clocked energy source 101, as a result of which the results from the threshold value comparison are written into the cells of the register in succession.
  • the clock in this exemplary embodiment is from tl to t3, for example with a pulse duty factor of 1 to 5, based on the pulse ranges tl to t2, which corresponds to I.
  • switch 115 is open, so that when a pulse I is output, here from t4 to t5, a level U2 is set at the input of the comparator from the clocked current source. This level then again arises at t6, where again with the one specified here Duty cycle 1 to 5 a pulse I is emitted from the clocked current source.
  • an additional switch 113 is provided. This can be operated in phases in which the quiescent current requirement is assessed as uncritical, so that possibly required high switch contact currents can be set.
  • the controller 110 can, for example, make specifications for the registers 108 and 109, whereby the logic 106 can then compare whether the query pattern formed in accordance with the respective pulses in register 105 matches the required one in 108 and / or 109 by one Generate start signal on line 112. Likewise, for security reasons, any, e.g. Two-out-of-three, six-out of eight, five-out-of-ten etc. exclusion processes, based on the register cells, are carried out.
  • FIG. 3 Another exemplary embodiment is shown in FIG. 3, the same elements not being described again.
  • the circuit 200 additionally contains a selection element 203, as a result of which different connections 119a to 119d can be queried in succession or the current pulse of the clocked current source can be applied to them. As a result, several input signals of several switches 115a to 115d and associated resistors 120a to 120d can be checked.
  • FIG. 3 also contains an actuating means 202, for example a state machine, by means of which a change in the pulse height of the delivered current pulses is possible. This is then explained in more detail in FIG. 4. For example, at time t7, a first pulse of width I from t7 to t8 is again emitted by the current source.
  • actuating means 202 for example a state machine
  • a duty cycle of 1 to 3 is selected, so that an impulse I is again emitted every three scanning steps.
  • a pulse I is emitted by the current source three times in succession at times t7, t9 and t10.
  • This pulse of width I is now varied in height.
  • the actuating means 202 in particular a state machine. This results in different voltage levels U3, U4 and U5, which in this case are all above the reference Ur. This will register in the first three cells each 0, so 0 0 0 registered.
  • a pulse I of variable magnitude is again output at times tll, tl2 and tl3, as a result of which the voltage levels U7, U8 and U9 are set. In this case, all three voltage levels are below the threshold voltage, which means that registers 1 1 1 are written into.
  • the voltage levels U6, U7 and U8 are set, for example, when three pulses are emitted at tl4, tl5 and tl6.
  • switches 115a and 115b for the pulses at tl5 and tll and at tl2 and tl6. As a rule, however, they can and will also differ.
  • the impedance of the respective switch or its resistance can be determined by the different pulse heights, because it can be recognized at which current the threshold voltage is exceeded, represented by a bit pattern in the register
  • wear states of switches can be recognized via a previously created fingerprint of the switch in the register. It is said that the switch can be tested in advance with certain predetermined currents, which results in a bit pattern in the register. If the switch now wears, its resistance changes due to the parasitic effects, and the difference in the bit pattern of the register when compared, for example, with the optionally shown further registers in 107, i.e. 108 or 109, provides information about aging and wear and can therefore be added Diagnostic purposes can be used.
  • the circuit corresponds to a wake-up circuit with an adjustable and clocked current source, which is connected to a threshold value evaluation, with individual comparison results being registered.
  • a threshold value evaluation By varying the current value and / or the switching thresholds, as will be shown in FIGS. 5 and 6, the electrical properties can also be opened / closed according to the switching states.
  • FIG. 5 shows a circuit 500 which, in addition to the elements already mentioned, comprises a voltage divider with adjustable resistor 502 and a further reference setting means, for example a controllable voltage source 501.
  • the supply voltage over line 503 is selected for the circuit 500, which, as already mentioned, can correspond to the previously mentioned supply voltage Uv or, as mentioned in the previous examples, can differ from this.
  • the reference means 501 or 502 can now be used to vary those for reference thresholds, which have been predetermined at Ur.
  • an open switch 115 can be tested by varying the reference from Ur to Url or Ur2 to determine whether the level U2 is above or below, depending on the pulse current.
  • the same diagnostic properties can be achieved as by varying the currents. For example, at time Tv when switch 115 is open, it can be concluded that it is worn at a voltage level U3, or the resistance value or the impedance of another switch can be checked by changing the threshold.
  • a low resting energy value consumption can be achieved by using the clocked energy source and the controller 110 can be switched off.
  • the signal supplier to be monitored for example a switch, is thus energized in a pulsed manner from an energy source, in particular a current source.
  • the clock generator determines the time grid and the transfer of the respective measurement result to the register 105 of the actual values.
  • the logic block 106 decides on the basis of e.g. B. the overall result m the register cells, for example 0100111 and the present status bit of this energy source, that is to say for example at the switch, opened or closed via the output of a start signal, i.e. wake-up signal to the controller.
  • this result in the actual value register 105 can be compared with setpoints predeterminable from the controller in setpoint registers, wherein these setpoint registers can also be provided from outside, for example via the CAN controller, for example also by means of SPI or similar interface.
  • the current values and / or switching thresholds can be set individually or globally or individually for the switch or signal supplier.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Power Sources (AREA)
  • Read Only Memory (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Logic Circuits (AREA)

Abstract

La présente invention concerne un circuit et un procédé pour prédéfinir un signal de départ. Ce signal de départ permet de faire passer un contrôleur d'un premier état à un second état, l'absorption d'énergie du contrôleur dans le second état étant plus élevée que dans le premier état. Ledit circuit présente une source d'énergie cadencée, qui délivre un signal d'énergie de manière cadencée, le signal de départ étant produit en fonction de ce signal d'énergie.
EP02721978A 2001-03-01 2002-02-25 Circuit et procede pour predefinir un signal de depart destine a un controleur Withdrawn EP1368730A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10109796 2001-03-01
DE10109796A DE10109796A1 (de) 2001-03-01 2001-03-01 Schaltung und Verfahren zur Vorgabe eines Startsignals für einen Controller
PCT/DE2002/000681 WO2002071585A2 (fr) 2001-03-01 2002-02-25 Circuit et procede pour predefinir un signal de depart destine a un controleur

Publications (1)

Publication Number Publication Date
EP1368730A2 true EP1368730A2 (fr) 2003-12-10

Family

ID=7675890

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02721978A Withdrawn EP1368730A2 (fr) 2001-03-01 2002-02-25 Circuit et procede pour predefinir un signal de depart destine a un controleur

Country Status (4)

Country Link
US (1) US7114088B2 (fr)
EP (1) EP1368730A2 (fr)
DE (1) DE10109796A1 (fr)
WO (1) WO2002071585A2 (fr)

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US20040135609A1 (en) 2004-07-15
US7114088B2 (en) 2006-09-26
DE10109796A1 (de) 2002-09-05
WO2002071585A3 (fr) 2003-05-08

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