CN1297300A

CN1297300A - Electronic encoder

Info

Publication number: CN1297300A
Application number: CN 99123763
Authority: CN
Inventors: 刘卫华; 王印斌; 李向阳; 王建华; 王爱中; 王喜芝
Original assignee: HAIWAN SAFETY TECHNOLOGY Co Ltd
Current assignee: Gulf Security Technology Co., Ltd.
Priority date: 1999-11-22
Filing date: 1999-11-22
Publication date: 2001-05-30
Anticipated expiration: 2019-11-22
Also published as: CN1125551C

Abstract

An electronic encoder is composed of automatic on/off circuit, code transmitter, code receiver, step-up circuit, electric level monitor, keyboard and display circuit. It has functions of non-polar bibus system, low-power sleep and automatic turn off, selftest and battery undervoltage indication.

Description

Lineside encoding unit

The present invention relates to a kind of a kind of Lineside encoding unit to fire detector and module coding.

For position and its place of surveying of differentiating fire detector, carry out the interior coding of certain limit all will in the middle of the practical application detector (or module), this coding generally all adopts the toggle switch or the coding contact pin place in circuit of a location number, whether the short circuit of open close, the coding contact pin by toggle switch and goes identification to finish by related circuit.So, not only operate cumbersomely, be difficult for to realize the production automation, and circuit is also very complicated.Dial-up beginning and coding contact pin volume are all bigger, the fire detector comparison heaviness that also just seems.The most important thing is, must in detector, buckle and to reserve notch, thereby destroyed the overall tightness of its shell, be difficult for to realize moistureproof, dustproof, waterproof, insect protected, had a strong impact on the reliability and the life-span of detector.Simultaneously, the reservation notch is returned mold design and is brought certain difficulty.

Purpose of the present invention provides a kind of device that just can encode or rewrite detector without toggle switch and coding contact pin.It is written to the Lineside encoding unit in the detector internal data memory by finishing information exchange with the inner single-chip microcomputer of detector with shared two buses of controller with address code, sensitivity, batch number information.

The object of the present invention is achieved like this: Lineside encoding unit has adopted the automatic opening/closing machine circuit, and the input signal by power supply links to each other with switch ON/OFF, is attempted by on the button CF, by CF and electrochemical capacitor C ₁₁, triode T ₂Parallel connection, T ₂Base stage, collector electrode respectively with triode T ₁Collector electrode, emitter link to each other and constitute compound NPN pipe, resistance R ₁A termination T ₁Collector electrode, the other end and T ₁Base stage, resistance R ₂Link to each other, by R ₁, R ₂Dividing potential drop the base current of multiple tube, resistance R are provided ₂The other end and triode T ₃Emitter connect, base stage is passed through resistance R ₃With single-chip microcomputer U ₁I/O mouth RAO connect U ₁The RA1 mouth pass through resistance R ₆Be connected to triode T ₆Base stage, grounded emitter, collector electrode passes through resistance R ₅Be connected in by triode T ₄, T ₅On the base stage of the PNP multiple tube of forming, resistance R ₄Be connected to the input of control MAX629 Switching Power Supply between the base stage of multiple tube and the collector electrode; The output signal V of Switching Power Supply ₁₈, be added in positive-negative-positive triode T ₈Emitter on, by the resistance R that connects between emitter and the base stage ₇With the resistance R that is connected on the base stage ₈The dividing potential drop of the two, R ₈The other end be connected to triode T ₉Collector electrode on, base stage is passed through resistance R ₉Single-chip microcomputer U ₁I/O mouth RCO be connected in mutually obtain on the bus high level circuit with by triode T ₁₀, T ₁₁The positive-negative-positive compound transistor of forming, its base stage is passed through resistance R ₁₀Be connected to single-chip microcomputer U ₁I/O mouth RC1 on obtain the signaling circuit that low-level circuit is formed; Regain decoding circuit by single-chip microcomputer U ₁RC3 mouth output, pass through resistance R ₁₁With diode D ₁Be applied on the bus B US1, at D ₁, R ₁₁Between connect diode D ₂, D ₃And resistance R ₁₂And ground connection, return the reading of sign indicating number by U ₁I/O mouth RC2 be connected to diode D ₃And resistance R ₁₂Between.

The present invention has following characteristics:

1, nonpolarity two bus systems

Shared one group of nonpolarity two bus of encoder and controller make the simplification of getting in touch between encoder and detector or the module, and since the two between not altogether, also reduced the interference signal that comes from either party, enlarged the application places of encoder.

2, can finish reading and writing of information such as address code, batch number, sensitivity.

Coding can be rewritten arbitrarily, but the production title of an emperor's reign, batch number, the style number of product are one-time writes, can not change.In order to improve the adaptability of detector and maintainable easily, make it be applicable to different places, its sensitivity is rewritable, but has added authority, just have only engineers and technicians can rewrite sensitivity in view of the needs of operation and maintenance.

3, the low-power consumption sleep and the function of shutting down automatically

Native system is not at open state but when having operation, U ₁Be in low-power sleep state with saves energy.Automatically the shutdown function is for fear of forgetting that owing to the artificial origin shutdown causes the lot of energy loss.

But the performance of 4 test probes or module

The native system special setting self-diagnostic function, by self diagnosis, can test the standing state of detector or module.Improved the reliability that product uses on the engineering.

5, the under-voltage deixis of battery

When cell voltage is lower than a certain limit, system will provide under-voltage information.This function is used for reminding engineers and technicians in time to change battery, avoids owing to the power supply reason produces system's instability, and influences the reliability that product uses on the engineering.

6, show succinctly intuitively, low in energy consumption

Native system adopts four segment code type liquid crystal displays, and simple, intuitive is low in energy consumption.

7, external form is small and exquisite attractive in appearance, easy to carry

Native system is similar to TV remote controller, and is connected with metallic bond, can hang between waist or wrist, is convenient to protect and carry.

The present invention embodiment in conjunction with the accompanying drawings further describes:

Fig. 1 is the circuit theory diagrams of native system.

Fig. 2 is the signaling circuit diagram of another embodiment.

Fig. 3 is the withdrawal decoding circuit figure of another embodiment.

Fig. 4 is the automatic shutdown circuitry figure of another embodiment.

Accompanying drawing 1 is the Lineside encoding unit circuit theory diagrams, and it is made up of automatic opening/closing machine circuit, signaling circuit, receipts decoding circuit, booster circuit, electronic monitoring circuit and keyboard and display circuit.Lineside encoding unit has adopted the automatic opening/closing machine circuit, and the input signal of power supply links to each other with switch ON/OFF, and is connected by it and connects on the key CF, makes CF and electrochemical capacitor C ₁₁, triode T ₂Parallel connection realizes automatic postboost hardware power up function, by T ₂Base stage, collector electrode respectively with triode T ₁Collector electrode, emitter link to each other and constitute compound NPN pipe, resistance R ₁One be terminated at T ₁Collector electrode, the other end and T ₁Base stage, resistance R ₂Dividing potential drop the base current of multiple tube, R are provided ₂The other end and T ₃Emitter connect T ₃Base stage pass through resistance R ₃With single-chip microcomputer U ₁I/O mouth RAO link to each other, effect provides the machine open/close signal.Single-chip microcomputer U ₁The RA1 mouth pass through resistance R ₆Be connected on T ₆Base stage on, T ₆Grounded emitter, collector electrode passes through resistance R again ₅Be connected to by T ₄, T ₅On the base stage of the PNP multiple tube of forming, (composition of multiple tube and T ₁, T ₂Mode identical) resistance R ₄Be connected between the base stage and collector electrode of multiple tube, it is the input of the Switching Power Supply of core that this part is used to control with MAX629, and the Switching Power Supply periphery is by C ₇, I ₁, D ₄, C ₈, C ₉, R ₁₄, R ₁₃And C ₁₀The typical circuit of forming.The signaling circuit is divided into the circuit that produces high level and produces low level circuit two parts: the output signal V of Switching Power Supply ₁₈, be added in positive-negative-positive triode T ₈Emitter on, connect T ₈Emitter and the resistance R between the base stage ₇With the resistance R that is connected on the base stage ₈The dividing potential drop of the two provides T ₈Conducting whether level, R ₈The other end be connected to T ₉Collector electrode on, its base stage is passed through resistance R again ₉With single-chip microcomputer U ₁I/O mouth RCO link to each other, the effect of above device is to obtain high level on bus; Low level is by T ₁₀, T ₁₁Form the compound transistor of a positive-negative-positive, its base current is by being connected U ₁I/O mouth RC1 on resistance R ₁₀Provide, regain in the decoding circuit, return the sign indicating number level by U ₁The RC3 mouth provide, pass through resistance R ₁₁With diode D ₁Be applied on the bus B US1, play the diode D of step-down effect ₂, D ₃, at D ₁, R ₁₁Between draw, pass through resistance R again ₁₂Ground connection is returned sign indicating number and is read by U ₁I/O mouth RC2 finish, it is connected D ₃And R ₁₂Between.Native system is by a joint 9V powered battery, select the core of the lower single-chip microcomputer PIC16C73 of power consumption (production of MICROCHIP company) for use as system, and select for use little power consumption MAX629 and HT1050 as voltage conversion device, the display part adopts ICM7211 to drive four segment code type LCDs of EDS-805-as chip for driving, and purpose all is the loss for limit electrical energy.After mains switch ON/OFF opens at C ₁₁On will produce charging current, this electric current directly is added in U ₆(HT1050) on the input, and the process conversion obtains 5V (VCC) voltage, single-chip microcomputer U on output ₁Electric after, first initialization is put height with the RAO mouth then, passes through R ₃Make T ₃Saturation conduction makes electric current can flow through series resistance R ₁, R ₂, by T ₁, T ₂The base stage of the multiple tube that is barricaded as is connected R ₁, R ₂Between, and because the dividing potential drop effect of the two makes its conducting, supply voltage just can pass through C ₁₁And pass through T ₂C, E pin be added in U ₆On, make power unit stable from keeping, this has just finished the function that powers on of starting shooting.U ₆Input also be connected on simultaneously voltage tester chip H ₁(HT7070) input, H when the IN terminal voltage is higher than 7V ₁The E pin be output as low level, when input during, be output as supply voltage, through series resistance R less than 7V ₁₉, R ₂₀Dividing potential drop, by U ₁The RA2 interface can read the voltage status value, show then.ICM7211 and sheet machine direct interface on the half, its 27-30 pin is a data input pin, the 31-34 section of being gating road, when data need show, U ₁The corresponding section of elder generation's gating gating road is delivered on the data input pin data by U again ₃Show.The adaper system puts other I/O mouths low, enters sleep state.If keyboard has action, U ₁The RB mouth will produce interrupt signal, and key assignments is read in the internal RAM.Judge key assignments, if the programming key, the decimal number that needs programming is converted into five trits, and (two burst pulses are represented " 0 ", one wide one narrow expression " 1 ", two broad pulses are represented " 2 "), wherein the width of broad pulse is 213.5US, the width of burst pulse is 30.5US.Pulse duration is by U ₁Timer internal obtain.Single-chip microcomputer U ₁(PIC16C73A) RCO mouth control R ₉, T ₉, R ₈, T ₈, R ₇, constituted the circuit that produces high level; RC1 mouth control R ₁₀, T ₁₁, T ₁₀, constituted the low level circuit of generation.During signaling, earlier RA1 is put high by control circuit R ₆, T ₆, R ₅, R ₄And by T ₁, T ₂The multiple tube of forming is started working booster circuit, and the time-delay certain hour is so that C ₇, C ₁₀Charging by the high and low variation of RC0, RC1 mouth, is passed through resistance R respectively then ₉, T ₁₁Saturated with end, again by two PNP pipe T ₇, T ₁₀Switch, on bus B US1, obtain required sign indicating number type.After according to communications protocol the sign indicating number type being sent entirely, forward yard state that reads back at once to.Read back decoding circuit by U ₁RC2, RC3 mouth, D ₁, D ₂, D ₃, R ₁₁, R ₁₂Form, put low RC0, RC1, RA1, RC3 is put height, make and keep 5V voltage, U on the BUS1 ₁Reading does not have back sign indicating number and obtains pwm value in the state-judgement of RC2 mouth, if pulsewidth is normal, this address just is written in the detector.Adjust the state of each I/O mouth, enter low-power sleep state.During sleep, counter is still worked, when the count value of counter exceeds preset value, and U ₁The oneself wakes up, carries out repeatedly the RAO mouth is put low instruction, at this moment R ₃Can not give T ₃Base stage base current is provided and multiple tube is ended, system will quit work owing to power down.

Accompanying drawing 2 is signaling circuit diagrams of another way, and VDD is the bus required voltage, and VCC can make triode T ₂, T ₃The voltage of saturation conduction, this signaling circuit also comprise the circuit that produces high level and produce low level circuit two parts: R ₆CONTROL1 end be connected on the I/O mouth or be connected on other drive circuit, the other end is connected on the A pin of optocoupler 03,03 K pin ground connection, the C pin meets VCC, the E pin meets triode T ₂Base stage, R ₃Be connected to T ₂Base stage and emitter between, T ₂Collector electrode pass through resistance R ₂Be connected to PNP triode T ₁Base stage on, R ₁One be terminated at T ₁The base stage other end and T ₁Emitter receive on the VDD T after connecting ₁Collector electrode be connected on the BUS1.The connection of above circuit has realized obtaining the purpose of high level.R ₇CONTROL2 end also be connected on the I/O mouth or be connected on other drive circuit, the other end is connected on the A pin of optocoupler 04,04 K pin ground connection, the C pin meets VCC, the E pin passes through resistance R ₅Connect little molehill NPN triode T ₃Base stage on, R ₄One be terminated at T ₃Base stage, the other end and T ₃Emitter receive BUS2 after connecting and go up (promptly " "), T ₃The also same T of collector electrode ₁Collector electrode equally be connected on the BUS1.This part circuit can obtain low level on bus.03,04 effect is to realize the photoelectricity isolation, also can not isolate as required, and available other control circuit is realized.R ₁, R ₃, R ₄Effect be control T ₁, T ₂, T ₃Base current, can remove need not.

Accompanying drawing 3 is withdrawal decoding circuit figure of another program, and VDD is added in R ₈An end, voltage-stabiliser tube Z ₁With capacitor C ₅Parallel connection again with R ₈Be composed in series a voltage stabilizing circuit, the C end 01 obtains a required time sign indicating number voltage.01 A pin passes through resistance R ₉Be connected on the VCC, the K pin is connected on triode T ₁Collector electrode on, T ₁Grounded emitter, base stage is passed through R ₁₀Be connected on the I/O mouth (or other control circuits); 01 E wore 02 A pin, the BUS1 of K human hair combing waste decoding circuit links to each other, 02 E pin ground connection, and the C pin passes through R ₁₁Be connected on I/O mouth (or other control circuits).01,02 can be replaced by triode on two herein.

Accompanying drawing 4 is the automatic shutdown circuitry of another program, and the operation principle of this circuit also is to have utilized the charge-discharge principle of electric capacity to realize the automatic on/off function.IN termination power switch, resistance R ₁Be connected in parallel on triode T ₁Emitter and base stage between, T ₁Collector electrode connect the input of voltage-stabiliser tube, base stage is passed through resistance R again ₂Be connected to triode T ₂Collector electrode on, capacitor C ₁Two ends be connected on T respectively ₂Collector and emitter on, grounded emitter, T ₂Base stage pass through resistance R ₃Receive on the I/O mouth of single-chip microcomputer.When the IN end added instantaneous voltage, electric current passed through R ₁, R ₂Give C ₄Charging, in charging process, T ₁Base stage because R ₁, R ₂The dividing potential drop effect and dragged down T ₁Saturation conduction, VCC offer system power supply after by voltage stabilizing, and put high FEED this moment immediately makes T ₂Saturation conduction is kept T ₁The low level of base stage, C ₄Charging finishes, and system also remains on the self-powered state.When FEED is put when low T ₂Be cut off and to C ₄Charging finishes T in this process up to charging ₁Conducting system always still works, because C ₄Do not recharge R ₁, R ₂Go up and flow through T with regard to no current ₁Base stage put height, T ₁Be cut off, system quits work owing to powering.T ₁Can replace T by multiple tube ₂Can replace T by multiple tube ₂Also can replace by optocoupler.

Claims

1, Lineside encoding unit is characterized in that, it has adopted the automatic opening/closing machine circuit, and the input signal by power supply links to each other with switch ON/OFF, is attempted by on the button CF, by CF and electrochemical capacitor C ₁₁, triode T ₂Parallel connection, T ₂Base stage, collector electrode respectively with triode T ₁Collector electrode, emitter link to each other and constitute compound NPN pipe, resistance R ₁A termination T ₁Collector electrode, the other end and T ₁Base stage, resistance R ₂Link to each other, by R ₁, R ₂Dividing potential drop the base current of multiple tube, resistance R are provided ₂The other end and triode T ₃Emitter connect, base stage is passed through resistance R ₃With single-chip microcomputer U ₁I/O mouth RAO connect U ₁The RA1 mouth pass through resistance R ₆Be connected to triode T ₆Base stage, grounded emitter, collector electrode passes through resistance R ₅Be connected in by triode T ₄, T ₅On the base stage of the PNP multiple tube of forming, resistance R ₄Be connected to the input of control MAX629 Switching Power Supply between the base stage of multiple tube and the collector electrode; The output signal V of Switching Power Supply ₁₈, be added in positive-negative-positive triode T ₈Emitter on, by the resistance R that connects between emitter and the base stage ₇With the resistance R that is connected on the base stage ₈The dividing potential drop of the two, R ₈The other end be connected to triode T ₉Collector electrode on, base stage is passed through resistance R ₉Single-chip microcomputer U ₁I/O mouth RCO be connected in mutually obtain on the bus high level circuit with by triode T ₁₀, T ₁₁The positive-negative-positive compound transistor of forming, its base stage is passed through resistance R ₁₀Be connected to single-chip microcomputer U ₁I/O mouth RC1 on obtain the signaling circuit that low-level circuit is formed; Regain decoding circuit by single-chip microcomputer U ₁RC3 mouth output, pass through resistance R ₁₁With diode D ₁Be applied on the bus B US1, at D ₁, R ₁₁Between connect diode D ₂, D ₃And resistance R ₁₂And ground connection, return the reading of sign indicating number by U ₁I/O mouth RC2 be connected to diode D ₃And resistance R ₁₂Between.

2, by the described Lineside encoding unit of claim 1, it is characterized in that the signaling circuit also can be designed to another circuit mode: by resistance R ₆CONTROL1 end be connected on the I/O mouth or be connected on other drive circuit, the other end is connected on the A pin of optocoupler 03,03 K pin ground connection, the C pin meets VCC, the E pin meets triode T ₂Base stage, resistance R ₃Be connected to T ₂Base stage and emitter between, T ₂Collector electrode pass through resistance R ₂Be connected to PNP triode T ₁Base stage on, resistance R ₁One be terminated at T ₁Base stage and emitter and receive on the VDD T ₁Collector electrode be connected on and obtain high level on the BUS1, by resistance R ₇CONTROL2 end also be connected on the I/O mouth or be connected on other drive circuit, the other end is connected on the A pin of optocoupler 04, K pin ground connection, the C pin meets VCC, the E pin passes through resistance R ₅Be connected in NPN triode T ₃Base stage, R ₄One be terminated at T ₃Base stage, the other end and T ₃Emitter receive BUS2 after connecting and go up ground connection, T ₃Collector electrode join and obtain low level on the BUS1.

3, by the described Lineside encoding unit of claim 1, it is characterized in that, regain decoding circuit and can be designed to another circuit mode; VDD is added in R ₈An end, by voltage-stabiliser tube Z ₁With capacitor C ₅Parallel connection and R ₈Be composed in series a voltage stabilizing circuit, the C end 01 obtains a required time sign indicating number voltage, and 01 A pin passes through resistance R ₉Be connected on the VCC, the K pin is connected on triode T ₁Collector electrode, grounded emitter, base stage is passed through resistance R ₁₀Connect on I/O mouth or other control circuits, 01 E wore 02 A pin, K pin and linked to each other with the BUS1 of signaling circuit, 02 E pin ground connection, and the C pin passes through R ₁₁Connect I/O mouth or other control circuits.

By claim 1 or 3 described Lineside encoding units, it is characterized in that 4, described withdrawal decoding circuit also can be replaced by another circuit; By IN termination power switch, resistance R ₁Be connected in parallel on triode T ₁Emitter and base stage between, T ₁Collector electrode connect the input of voltage-stabiliser tube, base stage is passed through resistance R again ₂Be connected to triode T ₂Collector electrode on, grounded emitter, T ₂Base stage pass through resistance R ₃Receive on the I/O mouth of single-chip microcomputer.