CN207637162U - A kind of identity card reading machine of instant playback electricity - Google Patents

Abstract

The utility model discloses a kind of identity card reading machines of instant playback electricity, including：Central processing unit, memory module, battery management module, radio-frequency module, radio-frequency antenna and display module；The central processing unit is separately connected display module, memory module, battery management module and radio-frequency module, and the radio-frequency module connects radio-frequency antenna, and the display module includes battery capacity indication module；It can make the remaining capacity value of the identity card reading machine real-time display moment internal battery by the circuit, convenient for carrying out charging process to accumulator, observation is intuitive, and the circuit detection error is small, and it is swift with judgement, it is simple in structure, circuit cost is low, has higher practicability.

Description

A kind of identity card reading machine of instant playback electricity

Technical field

The utility model belongs to identity card reading machine field, and in particular to a kind of identity card reading of instant playback electricity Machine.

Background technology

Identity card reading machine is widely used in major industries such as transport, finance, security protection, service, tourism, the day of resident Often life increasingly be unable to do without identity card.As resident identification card reads the universal of business, equipment is read in market to identity card Demand also increases therewith, and identity card reading machine principle is based on Radio Frequency Identification Technology, abides by IS01443B agreements.

Identity card reading machine has the portable equipment of storage battery power supply, the hand-held identity card reading machine in the prior art Do not have accumulator electric-quantity detection function, the current charge value of identity card reading machine cannot be intuitively shown, so often going out Now due to accumulator electric-quantity deficiency, is used so as to cause identity card reading machine unstable, influence the normal use of equipment, delay Workflow reduces working efficiency.

Utility model content

To overcome existing identity card reading machine not have the technological deficiency of real-time display accumulator electric-quantity, the utility model Disclose a kind of identity card reading machine of instant playback electricity.

Technical solution adopted by the utility model to solve its technical problems is a kind of identity cards of instant playback electricity to read Reading machine, including：Central processing unit, memory module, battery management module, radio-frequency module, radio-frequency antenna and display module；In described Central processor is separately connected display module, memory module, battery management module and radio-frequency module, and the radio-frequency module connects radio frequency Antenna, the display module include battery capacity indication module；

The battery capacity indication module includes battery capacity indication circuit, and the battery capacity indication circuit includes：Battery feed, benchmark Voltage, first resistor, second resistance, 3rd resistor, amplifier, the 5th resistance, comparator, zener diode, the 6th resistance, One NPN triode, analog-digital converter and microcontroller；

The battery feed connects the collector of the first NPN triode, and the emitter of the first NPN triode passes through first Resistance eutral grounding, the base stage of the first NPN triode connect the output end of comparator, the in-phase input end of comparator by the 6th resistance Connecting reference voltage, the in-phase input end of comparator is also connected with the cathode of zener diode, the plus earth of zener diode, than Compared with the output end that the inverting input of device connects by the 5th resistance amplifier, the in-phase input end of amplifier passes through second resistance The first end of first resistor, the first end of the second end connection 3rd resistor of first resistor are connected, the second end of 3rd resistor connects The input terminal of analog-digital converter, the second end of the inverting input connection 3rd resistor of amplifier are connect, the output end of amplifier connects The input terminal of analog-digital converter is connect, the output end of analog-digital converter connects microcontroller.

Further, the 4th electricity is also associated between the inverting input of the amplifier and the input terminal of analog-digital converter Resistance.

The output end of the microcontroller is also associated with memory and liquid crystal display, the output end connection memory of microcontroller Input terminal, the input terminal of the output end connection liquid crystal display of memory.

Further, the microcontroller uses the microcontroller of model STC89C52RC.

The display module further includes work indicating module and malfunction coefficient module.

The utility model has the beneficial effects that：It can make to store inside identity card reading machine real-time display moment by the circuit The remaining capacity value of battery, convenient for carrying out charging process to accumulator, observation is intuitive, and the circuit detection error is small, judges fast Speed, simple in structure, circuit cost is low, has higher practicability.

Description of the drawings

Fig. 1 is a kind of principle modules figure of the identity card reading machine of instant playback electricity of the utility model.

Fig. 2 is that a kind of circuit of the battery capacity indication circuit of the identity card reading machine of instant playback electricity of the utility model is former Reason figure.

Reference numeral：VIN-battery feed, U0- reference voltage, R1- first resistors, R2- second resistances, R3- thirds Resistance, the 4th resistance of R4-, U1- amplifiers, the 5th resistance of R5-, U2- comparators, the 6th resistance of DW-zener diode, R6-, The first NPN triodes of T1-.

Specific implementation mode

More detailed description is done to the embodiment of the utility model below in conjunction with attached drawing and reference numeral, makes to be familiar with ability The technology people in domain can implement according to this after studying this specification carefully.It should be appreciated that specific embodiment described herein is only solving The utility model is released, is not used to limit the utility model.

A kind of identity card reading machine of instant playback electricity, including：Central processing unit, memory module, battery management module, Radio-frequency module, radio-frequency antenna and display module；The central processing unit is separately connected display module, memory module, battery management Module and radio-frequency module, the radio-frequency module connect radio-frequency antenna, and the display module includes battery capacity indication module；

The battery capacity indication module includes battery capacity indication circuit, and the battery capacity indication circuit includes：Battery feed VIN, Reference voltage U0, first resistor R1, second resistance R2,3rd resistor R3, amplifier U1, the 5th resistance R5, comparator U2, voltage stabilizing Diode DW, the 6th resistance R6, the first NPN triode T1, analog-digital converter and microcontroller；

The collector of the first NPN triode of battery feed VIN connections T1, the emitter of the first NPN triode T1 Be grounded by first resistor R1, the base stage of the first NPN triode T1 by the output end of the 6th resistance R6 connection comparators U2, than In-phase input end compared with device U2 connects reference voltage U0, and the in-phase input end of comparator U2 is also connected with the moon of zener diode DW The inverting input of pole, the plus earth of zener diode DW, comparator U2 passes through the defeated of the 5th resistance R5 connection amplifiers U1 Outlet, the in-phase input end of amplifier U1 is by the first end of second resistance R2 connection first resistors R1, and the of first resistor R1 Two ends connect the first end of 3rd resistor R3, the input terminal of the second end connection analog-digital converter of 3rd resistor R3, amplifier U1 Inverting input connection 3rd resistor R3 second end, the input terminal of the output end connection analog-digital converter of amplifier U1, mould The output end of number converter connects microcontroller；Reference voltage U0 is the reference voltage of external access, when the reverse phase of comparator U2 is defeated When entering the voltage value at end and being less than the voltage value of its in-phase input end, the output voltage of comparator U2 increases, at this time tri- poles the first NPN The base voltage of pipe T1 increases, and increases to the operating current of the first NPN triode T1, which generates on first resistor R1 Pressure drop increase, this control source to amplifier U1 is amplified so that the output voltage of amplifier U1 increases, and passes through detection The voltage of current battery feed, is then handled by microcontroller, obtains the current discharge capacity of accumulator, to instant playback body The battery capacity of part card reading machine；Wherein 3rd resistor R3 and the 4th resistance R4 determines the amplification factor of amplifier U1, the second electricity It is R6 current-limiting resistances to hinder R2, the 5th resistance R5 and the 6th resistance, protects circuit.

It is also associated with the 4th resistance R4 between the inverting input and the input terminal of analog-digital converter of the amplifier U1；Institute It is current-limiting resistance, the stability of enhancing circuit work to state the 4th resistance R4.

The output end of the microcontroller is also associated with memory and liquid crystal display, the output end connection memory of microcontroller Input terminal, the input terminal of the output end connection liquid crystal display of memory；The voltage value of the memory storage battery feed, can To store multigroup voltage value, battery feed remaining capacity value is quickly estimated, is convenient for analysis and observation, it is aobvious by liquid crystal display Show that identity card reading machine current electric quantity, observation are intuitive.

The microcontroller uses the microcontroller of model STC89C52RC；STC89C52RC microcontrollers, which have superpower resisting, to be done Ability is disturbed, while there is reset circuit inside microcontroller, external reset circuit can be removed from, simplifies system design.

The display module further includes work indicating module and malfunction coefficient module；The work indicating module and failure are aobvious Show that module facilitates people to judge the working condition of identity card reading machine at this time, processing easy to repair.

The above content is the further descriptions made to the utility model in conjunction with specific preferred embodiment, cannot recognize Determine specific embodiment of the present utility model and is confined to these explanations.For the common skill of the utility model technical field For art personnel, the other embodiment obtained in the case where not departing from the technical solution of the utility model should be included in this practicality In novel protection domain.

Claims (5)

1. a kind of identity card reading machine of instant playback electricity, it is characterised in that：Including：Central processing unit, memory module, battery Management module, radio-frequency module, radio-frequency antenna and display module；The central processing unit be separately connected display module, memory module, Battery management module and radio-frequency module, the radio-frequency module connect radio-frequency antenna, and the display module includes battery capacity indication module；

The battery capacity indication module includes battery capacity indication circuit, and the battery capacity indication circuit includes：Battery feed（VIN）, base Quasi- voltage（U0）, first resistor（R1）, second resistance（R2）, 3rd resistor（R3）, amplifier（U1）, the 5th resistance（R5）, ratio Compared with device（U2）, zener diode（DW）, the 6th resistance（R6）, the first NPN triode（T1）, analog-digital converter and microcontroller；

The battery feed（VIN）Connect the first NPN triode（T1）Collector, the first NPN triode（T1）Transmitting Pole passes through first resistor（R1）Ground connection, the first NPN triode（T1）Base stage pass through the 6th resistance（R6）Connect comparator（U2） Output end, comparator（U2）In-phase input end connect reference voltage（U0）, comparator（U2）In-phase input end be also connected with Zener diode（DW）Cathode, zener diode（DW）Plus earth, comparator（U2）Inverting input pass through the 5th Resistance（R5）Connect amplifier（U1）Output end, amplifier（U1）In-phase input end pass through second resistance（R2）Connection first Resistance（R1）First end, first resistor（R1）Second end connect 3rd resistor（R3）First end, 3rd resistor（R3）'s Second end connects the input terminal of analog-digital converter, amplifier（U1）Inverting input connect 3rd resistor（R3）Second end, Amplifier（U1）Output end connection analog-digital converter input terminal, the output end of analog-digital converter connects microcontroller.

2. a kind of identity card reading machine of instant playback electricity as described in claim 1, it is characterised in that：The amplifier （U1）Inverting input and the input terminal of analog-digital converter between be also associated with the 4th resistance（R4）.

3. a kind of identity card reading machine of instant playback electricity described in claim 1, it is characterised in that：The microcontroller it is defeated Outlet is also associated with memory and liquid crystal display, the input terminal of the output end connection memory of microcontroller, the output end of memory Connect the input terminal of liquid crystal display.

4. a kind of identity card reading machine of instant playback electricity as claimed in claim 3, it is characterised in that：The microcontroller is adopted With the microcontroller of model STC89C52RC.

5. a kind of identity card reading machine of instant playback electricity as described in claim 1, it is characterised in that：The display module Further include work indicating module and malfunction coefficient module.