CN209388324U - A kind of power failure writing circuit and outgoing operation with the circuit are looked for something system - Google Patents

Abstract

It looks for something system the utility model discloses a kind of power failure writing circuit and outgoing operation with the circuit, which includes signal acquisition input terminal including voltage signal sampling circuit and fault cues circuit；The outgoing operation system of looking for something includes single-chip microcontroller filtering module, RFID read-write module, serial ports screen display module and power module, RFID read-write module, serial ports screen display module and power module are connected with single-chip microcontroller filtering module, power module includes power failure writing circuit, and the voltage sample output end and the fault cues output end are connected with single-chip microcontroller filtering module.In power failure writing circuit described in the utility model, by the design of voltage signal sampling circuit and fault cues circuit, when causing communication abnormality because of electric voltage over press, the whole process of abnormal voltage can recorde, in this way, personnel easy to repair rapidly and accurately trouble-shooting source.

Description

A kind of power failure writing circuit and outgoing operation with the circuit are looked for something system

Technical field

It looks for something technical field the utility model relates to RFID, more particularly, to a kind of power failure writing circuit and have should The outgoing operation of circuit is looked for something system.

Background technique

Enterprises and institutions, China arrange outworker to carry out installation and debugging, maintenance of equipment, upper well according to need of work Often there is the problem of tool loss in the outgoing operations such as service, outgoing operation.For example telecommunications, power grid etc. are frequently necessary to outgoing operation Large and medium-sized enterprise staff go out operation when annual tool loss cause unnecessary lost value to be up to hundreds of thousands even It is up to a million.In the tool collection mode generallyd use at this stage, made mostly by " outgoing construction tool, store keeping system " Degreeization constraint is manually collected, but it is traditional artificially collect there are intricate operation, human error is big the problems such as, and how to advise The outgoing power tool of model management annoyings always each enterprise.For this purpose, existing businessman's exploitation has RFID to look for something system to realize work The storage and management of tool, but the prior art still has following problem: 1, power failure logging modle is lacked, when because of power supply It, can not the quick lock in source of trouble when breaking down and causing communication abnormality；2, it is existing look for something system mainly by manually control read Label data is taken, can not accomplish that voice control reads and identifies automatically；3, Internet of Things module, object detected by this system are lacked Product information can not be rapidly transmitted to server, so will affect the convenience of management work.

Utility model content

The purpose of the utility model is to overcome the above problem of the prior art, a kind of power failure writing circuit and tool are provided There is the outgoing operation of the circuit to look for something system, when causing communication abnormality because of power issue, which can help to operate Personnel rapidly find out the source of trouble；The operation system of looking for something can effectively improve the convenience of article collection and management work.

The purpose of this utility model is achieved through the following technical solutions:

A kind of power failure writing circuit, it is characterised in that: including signal acquisition input terminal, voltage signal sampling circuit and Fault cues circuit；

Voltage signal sampling circuit includes the first inverting amplifier and the second inverting amplifier, and signal acquisition input terminal passes through First resistor accesses the inverting input terminal of the first inverting amplifier, and the non-inverting input terminal of the first inverting amplifier passes through second resistance The output end of ground connection, the first inverting amplifier is connected by 3rd resistor with the inverting input terminal of the second inverting amplifier, and second The non-inverting input terminal of inverting amplifier is connected with RC low-pass filtering by the 4th resistance eutral grounding, the output end of the second inverting amplifier Device, further includes the 5th resistance and the 6th resistance, and connecing altogether for the first inverting amplifier and first resistor is accessed in one end of the 5th resistance Point, the total contact of the other end access the first inverting amplifier and 3rd resistor of the 5th resistance, one end access the of the 6th resistance The other end of the total contact of two inverting amplifiers and 3rd resistor, the 6th resistance accesses the second inverting amplifier and RC low-pass filtering The total contact of device, the output end of RC low-pass filter are voltage sample output end；

Fault cues circuit includes switching tube, the first triode and the second triode, and signal acquisition input terminal is by successively The control terminal of the zener diode of connection and the 7th resistance access switching tube, the drain electrode end of switching tube pass through the 8th resistance eutral grounding, The source terminal of switching tube accesses the current collection of the second triode by sequentially connected 9th resistance, the tenth resistance and eleventh resistor The emitter of pole, the second diode is grounded by twelfth resistor, the base stage access switching tube of the second triode and the 8th resistance Total contact, the emitter of the first triode accesses the total contact of the 9th resistance and the tenth resistance by thirteenth resistor, first The collector of triode accesses the total contact of the second triode and the 8th resistance, the base stage of the first triode by the 14th resistance The total contact of the tenth resistance and eleventh resistor is accessed, the total junction access of the 9th resistance and the tenth resistance has circuit voltage The total contact of VCC, the second triode and twelfth resistor is fault cues output end.

The utility model is in application, signal acquisition input terminal is to access in the power module of system, and voltage sample is defeated Outlet and fault cues output end when the electric voltage over press that power module provides, are then can recorde in access control single chip computer The whole process of abnormal voltage, personnel easy to repair analyze failure according to voltage data.Due to internal memory of single board is limited can not Save total data, it is therefore desirable to which design error failure voltage prompt facility exports high level after having served as pressure life, and single-chip microcontroller receives After high level, supply voltage 20S data are saved in single-chip microcontroller memory when failure is occurred, so as in the case where communication abnormality Search the source of trouble.

In voltage signal sampling circuit, the first inverting amplifier and the second inverting amplifier select TL084.It is adopted from signal Collect the voltage of input terminal input by reverse phase composed by first resistor, second resistance, the 5th resistance and the first inverting amplifier The voltage of output voltage is adjusted in -3.3-0V range by proportional amplifier, then passes through the 4th resistance, 3rd resistor, the 6th Voltage signal is switched into 0-3.3V after the voltage follower of resistance and the second inverting amplifier composition, then passes through RC low-pass filtering Device is followed by the port AD of control single chip computer, the real-time recording voltage data of control single chip computer, due to limited memory, Zhi Nengbao The data of 20s are deposited, therefore when failure occurs, 20S data are needed to be saved in memory.In fault cues circuit, the one or three Pole pipe selects PNP type triode, and the second triode selects NPN type triode, and N-channel MOS pipe can be selected in switching tube.It is adopted through signal After the electric voltage over press for collecting input terminal input, after zener diode conducting, the Vgs voltage of switching tube is increased, when more than threshold voltage After be connected, cause the voltage at the 8th resistance both ends to increase, since the ground level of the second triode is connected with the 8th resistance and be connected, lead The base voltage decline of first triode exports high level to make the first triode ON after logical.Control single chip computer receives height It is saved in 20S after level and adopts voltage signal, circuit voltage VCC gives the one or three by the first triode, the 14th resistance at this time Pole pipe ground level provides base voltage.Due to power supply automatic protection after over-voltage, over-voltage trigger signal disappears, and switching tube is no longer turned on, Also can not make the first triode ON, thus this circuit design have circuit voltage VCC, the first triode, the 14th resistance after It is continuous to make the first triode ON, high level is exported to control single chip computer.

Further, the RC low-pass filter includes the 15th resistance and capacitor, and institute is accessed in one end of the 15th resistance The output end of the second inverting amplifier is stated, the other end of the 15th resistance is connected with one end of capacitor, the other end ground connection of capacitor, The total contact of 15th resistance and capacitor is the voltage sample output end.

A kind of outgoing operation is looked for something system, including single-chip microcontroller filtering module, RFID read-write module, serial ports screen display module and Power module, RFID read-write module, serial ports screen display module and power module are connected with single-chip microcontroller filtering module, power module Including the power failure writing circuit as described in preceding any one, the voltage sample output end and the fault cues output end It is connected with single-chip microcontroller filtering module.

It further, further include the Internet of Things module being connect with single-chip microcontroller filtering module, Internet of Things module includes Internet of Things The main control chip of single-chip microcontroller and Internet of Things slave, Internet of Things single-chip microcontroller selects stm32L151C8T6, the master control core of Internet of Things slave Piece selects BC-28.

The system uses BC-28 Internet of Things development board, which is the BC- using stm32L151C8T6 single-chip microcontroller as host 28 modules form for slave.This system uses udp protocol, receives RFID by RS232 serial ports and looks for something the data of system, makes Ali's Cloud Server is transferred data to China Telecom's Internet of Things network interface card, and develops RFID item Intelligence Page, user Ke Tong It crosses computer or mobile phone logon web page checks Item Information, the recycling record for article of leafing through, it is ensured that it is quasi- that each article collects information It is really errorless, effectively article can be managed.The master chip of the module use stm32L151C8T6 low-power scm and BC-28 module transmits data using China Telecom's Internet of Things network interface card, and using 3.7V, the lithium battery of 3000mAh carries out it Power supply carries out data interaction using RS232 serial ports and BC-28 module, Item Information is transferred to BC-28 mould by the serial ports Block, the development board power consumption is extremely low, reaches uA rank, is surveyed after the completion of transmitting data, and 1 point enters dormant state after 50 seconds, when having When data upload, immediate data is sent to cloud, is very suitable to business unit's use.

It further, further include that the speech recognition connecting with single-chip microcontroller filtering module enters for module, speech recognition enters for mould The main control chip of block selects the M6 of Iflytek.

For this module using the M6 module of Iflytek as master control, M6 module is the offline of a built-in speech recognition engine Speech recognition module, recognition speed identify faster than cloud, not consumption network flow.This module is sent out by serial ports to system of looking for something Hexadecimal is sent to instruct, system of looking for something makes corresponding movement according to instruction, to reach the function of voice control.Pass through RFID Module for reading and writing reads a plurality of label data set, through the system of looking for something to the screening and processing of these data after, and pass through Serial ports sends the corresponding character string of label and enters for module to speech recognition, and speech recognition enters for module and execute corresponding voice again broadcasting It puts, to reach the function of voice reading label data information.

Further, the main control chip of the single-chip microcontroller filtering module selects stm32F103ZET6.

This module, as main control chip, is responsible for carrying out label data using the stm32F103ZET6 chip of ARM32 V7 Processing.

Further, the RFID read-write module further includes Anneta module, and the main control chip of RFID read-write module selects FI- R300T。

Anneta module selects 6dbi ceramic antenna.This module is using low-power consumption, the module for reading and writing of high reliablity, branch ISO- 18000-6C consensus standard, supports MiniUSB interface modes, and 5V power supply supports UART communication modes, supports the communication side RS232 Formula, the SMA antennal interface of standard, the success of band command reception and label read successfully LED light instruction, and band is automatic to send setting instruction Triger locking press button, read using 6992 labels, to cooperate 6dbi antenna away from test, it is readable 5 meters farthest.

Further, the main control chip of the serial ports screen display module selects TJC3224K028_011R.The module uses The stm32F103ZET6 chip of ARM32 V7 is responsible for handling label data as main control chip.

Further, the power module includes that 12V turns 5V conversion circuit and 5V turns 3.3V conversion circuit；

12V turns the test side of 5V conversion circuit as the signal acquisition input terminal.

In power module design, to consider whether power supply chip meets power demand, also by analog circuit and number Circuit power supply separates, and avoids interfering.This system needs voltage to be used to have 3.3V, 5V.Meanwhile identical voltage is also different Chip or the different part power supply of same chip, interfere with each other to reduce, ensure the stable operation of product safety, this module packet The case where including two sets or more of 12V and turn 5V conversion circuit and 3.3V conversion circuit, powering for distinct interface.

The utility model has the following beneficial effects:

1, in power failure writing circuit described in the utility model, pass through voltage signal sampling circuit and fault cues electricity The design on road can recorde the whole process of abnormal voltage when causing communication abnormality because of electric voltage over press, in this way, convenient for dimension Repair personnel rapidly and accurately trouble-shooting source.

2, during system is looked for something in outgoing operation described in the utility model, by the design of Internet of Things module, can be convenient for object In product information data transmission to Cloud Server, in this way, improving the convenience of Item Management work.

3, during system is looked for something in outgoing operation described in the utility model, the design of module is entered for by speech recognition, can be made This system has the function of voice control, in this way, the user experience of operator can be improved, can also improve article and collect and manage The agility that science and engineering is made.

Detailed description of the invention

Fig. 1 is a kind of circuit diagram of power failure writing circuit described in the utility model；

Fig. 2 is that a kind of outgoing operation described in the utility model is looked for something the frame diagram of system；

Fig. 3 is the circuit diagram that 12V described in the utility model turns 5V conversion circuit；

Fig. 4 is the circuit diagram that 5V described in the utility model turns 3.3V conversion circuit.

Title corresponding to appended drawing reference in attached drawing are as follows: 1, single-chip microcontroller filtering module, 2, RFID read-write module, 3, serial ports screen Display module, 4, Anneta module, 5, power module, 6, Internet of Things module, 7, speech recognition enter for module, 8,12V turn 5V conversion Circuit, 9,5V turn 3.3V conversion circuit, 10, power failure writing circuit.

Specific embodiment

The utility model is described in further detail below with reference to examples and drawings, but the implementation of the utility model Mode is without being limited thereto.

Embodiment 1

As shown in Figure 1, a kind of power failure writing circuit, including signal acquisition input terminal TP, voltage signal sampling circuit With fault cues circuit；

Voltage signal sampling circuit includes the first inverting amplifier A1 and the second inverting amplifier A2, signal acquisition input terminal TP accesses the inverting input terminal of the first inverting amplifier A1, the non-inverting input terminal of the first inverting amplifier A1 by first resistor R1 It is grounded by second resistance R2, the output end of the first inverting amplifier A1 passes through 3rd resistor R3's and the second inverting amplifier A2 Inverting input terminal is connected, and the non-inverting input terminal of the second inverting amplifier A2 is grounded by the 4th resistance R4, the second inverting amplifier The output end of A2 is connected with RC low-pass filter, further includes the 5th resistance R5 and the 6th resistance R6, a termination of the 5th resistance R5 Enter the total contact of the first inverting amplifier A1 Yu first resistor R1, the other end of the 5th resistance R5 accesses the first inverting amplifier A1 With the total contact of 3rd resistor R3, one end access the second inverting amplifier A2 and 3rd resistor R3's of the 6th resistance R6 connects altogether Point, the total contact of other end access the second inverting amplifier A2 and RC low-pass filter of the 6th resistance R6, RC low-pass filter Output end be voltage sample output end OUT1；

Fault cues circuit includes switching tube Q, the first triode T1 and the second triode T2, signal acquisition input terminal TP logical Cross the control terminal of sequentially connected zener diode D and the 7th resistance R7 access switching tube Q, the drain electrode end of switching tube Q passes through the Eight resistance R8 ground connection, the source terminal of switching tube Q pass through sequentially connected 9th resistance R9, the tenth resistance R10 and eleventh resistor R11 accesses the collector of the second triode T2, and the emitter of the second diode T2 is grounded by twelfth resistor R12, and the two or three The total contact of base stage access the switching tube Q and the 8th resistance R8 of pole pipe T2, the emitter of the first triode T1 pass through the 13rd electricity The total contact that R13 accesses the 9th resistance R9 and the tenth resistance R10 is hindered, the collector of the first triode T1 passes through the 14th resistance R14 accesses the total contact of the second triode T2 and the 8th resistance R8, base stage the tenth resistance R10 of access and the of the first triode T1 The total junction access of the total contact of 11 resistance R11, the 9th resistance and the tenth resistance has circuit voltage VCC, the second triode The total contact of T2 and twelfth resistor R12 is fault cues output end OUT2.

Preferably, the RC low-pass filter includes the 15th resistance R15 and capacitor C1, one end of the 15th resistance R15 The output end of the second inverting amplifier A2 is accessed, the other end of the 15th resistance R15 is connected with one end of capacitor C1, capacitor The other end of C1 is grounded, and the total contact of the 15th resistance R15 and capacitor C1 are the voltage sample output end OUT1.

Embodiment 2

The system as shown in Fig. 2, a kind of outgoing operation is looked for something, including single-chip microcontroller filtering module 1, RFID read-write module 2, serial ports Shield display module 3 and power module 5, RFID read-write module 2, serial ports screen display module 3 and power module 5 are filtered with single-chip microcontroller Module 1 is connected, and power module 5 includes the power failure writing circuit as described in any one of embodiment 1, the voltage sample Output end OUT1 and the fault cues output end OUT2 are connected with single-chip microcontroller filtering module 1.

In the present embodiment, voltage sample output end OUT1 is connected with the end AD of single-chip microcontroller filtering module 1, fault cues output End OUT2 is connected with the input terminal of single-chip microcontroller filtering module 1.

Embodiment 3

The present embodiment has made restriction further below on the basis of embodiment 2: further including and single-chip microcontroller filtering module 1 The Internet of Things module 6 of connection, Internet of Things module 6 include Internet of Things single-chip microcontroller and Internet of Things slave, the master control of Internet of Things single-chip microcontroller Chip selects stm32L151C8T6, and the main control chip of Internet of Things slave selects BC-28.

Embodiment 4

The present embodiment has made restriction further below on the basis of embodiment 2: further including and single-chip microcontroller filtering module 1 The speech recognition of connection enters for module 7, and the main control chip that speech recognition enters for module 7 selects the M6 of Iflytek.

Embodiment 5

The present embodiment has made restriction further below on the basis of embodiment 2: the master of the single-chip microcontroller filtering module 1 It controls chip and selects stm32F103ZET6.

Preferably, the RFID read-write module 2 further includes Anneta module 4, and the main control chip of RFID read-write module 2 is selected FI-R300T。

Preferably, the main control chip of the serial ports screen display module 3 selects TJC3224K028_011R.

As shown in Figure 3 to Figure 4, it is preferable that the power module 5 turns 5V conversion circuit 8 including 12V and 5V turns 3.3V conversion Circuit 9；

12V turns the test side of 5V conversion circuit 8 as the signal acquisition input terminal TP.

As shown in figure 3, turning in 5V conversion circuit 8 in 12V, in application, the DC power supply of access input unit is 12V, warp Crossing converting unit then can be in circuit voltage output end and device voltage output end output 3.3V voltage.Wherein, when output unit is defeated When the electric current of submitting is excessively high, fuse can then play a protective role to entire circuit from melting.The setting of 20th resistance R20 can rise To metering function, device voltage output end is avoided to export excessively high electric current and damage electrical part.Light emitting diode is as indicator light Whether it is in normal operation for cue circuit.MP1471AGJ can be selected in conversion chip.

The above content is the further descriptions made in conjunction with specific preferred embodiment to the utility model, cannot recognize Determine specific embodiment of the present utility model to be only limited to these instructions.For the common skill of the utility model technical field For art personnel, the other embodiments obtained in the case where not departing from the technical solution of the utility model be should be included in practical In novel protection scope.

Claims (9)

1. a kind of power failure writing circuit, it is characterised in that: including signal acquisition input terminal (TP), voltage signal sampling circuit With fault cues circuit；

Voltage signal sampling circuit includes the first inverting amplifier (A1) and the second inverting amplifier (A2), signal acquisition input terminal (TP) by first resistor (R1) access the first inverting amplifier (A1) inverting input terminal, the first inverting amplifier (A1) it is same Phase input terminal is grounded by second resistance (R2), and the output end of the first inverting amplifier (A1) passes through 3rd resistor (R3) and second The inverting input terminal of inverting amplifier (A2) is connected, and the non-inverting input terminal of the second inverting amplifier (A2) passes through the 4th resistance (R4) Ground connection, the output end of the second inverting amplifier (A2) are connected with RC low-pass filter, further include the 5th resistance (R5) and the 6th electricity It hinders (R6), the total contact of one end access the first inverting amplifier (A1) and first resistor (R1) of the 5th resistance (R5), the 5th electricity Hinder the total contact of other end access the first inverting amplifier (A1) and 3rd resistor (R3) of (R5), one end of the 6th resistance (R6) The total contact of the second inverting amplifier (A2) Yu 3rd resistor (R3) are accessed, the other end of the 6th resistance (R6) accesses the second reverse phase The total contact of amplifier (A2) and RC low-pass filter, the output end of RC low-pass filter are voltage sample output end (OUT1)；

Fault cues circuit includes switching tube (Q), the first triode (T1) and the second triode (T2), signal acquisition input terminal (TP) pass through the control terminal of sequentially connected zener diode (D) and the 7th resistance (R7) access switching tube (Q), switching tube (Q) Drain electrode end be grounded by the 8th resistance (R8), the source terminal of switching tube (Q) passes through sequentially connected 9th resistance (R9), the tenth The emitter of resistance (R10) and the collector of eleventh resistor (R11) access the second triode (T2), the second diode (T2) is logical Cross twelfth resistor (R12) ground connection, base stage access switching tube (Q) of the second triode (T2) and connecing altogether for the 8th resistance (R8) Point, the emitter of the first triode (T1) access the 9th resistance (R9) and the tenth resistance (R10) by thirteenth resistor (R13) The collector of contact altogether, the first triode (T1) passes through the 14th resistance (R14) access the second triode (T2) and the 8th resistance (R8) total contact, the base stage of the first triode (T1) access the total contact of the tenth resistance (R10) and eleventh resistor (R11), The total junction of 9th resistance and the tenth resistance, which accesses, circuit voltage VCC, the second triode (T2) and twelfth resistor (R12) Total contact be fault cues output end (OUT2).

2. a kind of power failure writing circuit according to claim 1, it is characterised in that: the RC low-pass filter includes The defeated of second inverting amplifier (A2) is accessed in one end of 15th resistance (R15) and capacitor (C1), the 15th resistance (R15) The other end of outlet, the 15th resistance (R15) is connected with one end of capacitor (C1), the other end ground connection of capacitor (C1), and the 15th The total contact of resistance (R15) and capacitor (C1) are the voltage sample output end (OUT1).

The system 3. a kind of outgoing operation is looked for something, it is characterised in that: including single-chip microcontroller filtering module (1), RFID read-write module (2), Serial ports screen display module (3) and power module (5), RFID read-write module (2), serial ports screen display module (3) and power module (5) It is connected with single-chip microcontroller filtering module (1), power module (5) includes the power supply event as described in any one of claim 1~2 Hinder writing circuit, the voltage sample output end (OUT1) and the fault cues output end (OUT2) with single-chip microcontroller filter module Block (1) is connected.

The system 4. a kind of outgoing operation according to claim 3 is looked for something, it is characterised in that: further include and single-chip microcontroller filter module The Internet of Things module (6) of block (1) connection, Internet of Things module (6) includes Internet of Things single-chip microcontroller and Internet of Things slave, Internet of Things monolithic The main control chip of machine selects stm32L151C8T6, and the main control chip of Internet of Things slave selects BC-28.

The system 5. a kind of outgoing operation according to claim 3 is looked for something, it is characterised in that: further include and single-chip microcontroller filter module The speech recognition of block (1) connection enters for module (7), and the main control chip that speech recognition enters for module (7) selects the M6 of Iflytek.

The system 6. a kind of outgoing operation according to claim 3 is looked for something, it is characterised in that: the single-chip microcontroller filtering module (1) main control chip selects stm32F103ZET6.

The system 7. a kind of outgoing operation according to claim 3 is looked for something, it is characterised in that: the RFID read-write module (2) It further include Anneta module (4), the main control chip of RFID read-write module (2) selects FI-R300T.

The system 8. a kind of outgoing operation according to claim 3 is looked for something, it is characterised in that: the serial ports screen display module (3) main control chip selects TJC3224K028_011R.

The system 9. a kind of outgoing operation according to claim 3 is looked for something, it is characterised in that: the power module (5) includes 12V turns 5V conversion circuit (8) and 5V turns 3.3V conversion circuit (9)；

12V turns the test side of 5V conversion circuit (8) as the signal acquisition input terminal (TP).