CN2667555Y - Intelligent digital controller - Google Patents

Abstract

The utility model discloses an intelligent digital controller, containing a control chip which is respectively connected with a key data interface, a memory, a low voltage detecting and warning module, a drive module, a scrambler electricising circuit and a channel selection module. The key data interface is connected with a key chip and the drive module is connected with a direct current motor or an electromagnet. The intelligent digital controller integrates the information technology and the electronics. Adopting the burgeoning single bus technology and realizing the data reading and writing by making an E-key contacting a contact for an instant, the intelligent digital controller not only has the advantages of the non-contact IC cards such as easy operation and cheapness but also is highly safe, convenient and reliable.

Description

The intelligent digital controller

Technical field

The utility model relates to a kind of intelligent digital controller.

Background technology

The security protection industry has entered surplus the China existing 20 year, and along with the quickening of China's " moderately well-off comprehensively " pace of construction, along with the raising of compatriots' knowledge hierarchy and income level, basic change has taken place security precautions.With rapid changepl. never-ending changes and improvements and the computer technology of science and technology is universal comprehensively in addition, and high-wall, guardrail and anti-theft net are progressively dwindling its original industry manor, even finally withdraw from the industry stage in traditional people's air defense---look after the house, protect institute and patrol party, thing is anti----.High-tech industry representative: technical precaution---the integrated guard against theft and alarm system of multi-functional, multisystem then just penetrates in the modern life with inexpressible inexorable trend.

Computer technology flourish makes the digital recognition system based on technology such as bar code, magnetic card, IC-cards replace artificial cognition gradually, and is widely used in fields such as finance, telecommunications, commerce, and profound influence daily life.But the digital recognition system of formations such as bar code, magnetic card, IC-card exists and carries inconvenience, sensitive for damages, can not be applied to deficiencies such as rugged surroundings.Along with development of semiconductor, Contact Type Ic Card with better function, that reliability is higher becomes main flow.The major advantage of Contact Type Ic Card is that card memory capacity is big, and fairly perfect complete mechanism is arranged.Adopt the intelligent digital controller, can set the various control authority neatly, prevent bootlegging, realize differentiated control and district management.

Summary of the invention

The purpose of this utility model provides a kind of intelligent digital controller.

It has control chip, control chip and is connected with key data interface, storer, low pressure detection alarm module, driver module, emergent charging circuit, channel selecting module respectively, the key data interface is connected with the key chip, and driver module is connected with Zhi Liudianji electromagnet.

The intelligent digital controller has merged infotech and electronic technology.It adopts emerging Single Wire Bus Technology, touches the contact by electron key moment and finishes reading and writing data.This controller is widely used, and both can apply to fixedly lockset such as door lock, safety cabinet, can be used for safety requirements again than higher valve, control box etc., as the control section of inside.

The core technology of intelligent digital controller is based on the Single Wire Bus Technology of electron key, promptly realizes data line, address wire, control line and power lead are kept to single line by a multi-functional device, realizes single-wire communication.

As a kind of Novel Intelligent information products, it has following advantage to compare traditional product:

1. do not need external circuit, do not need computer network, adopt powered battery, be in energy-saving mode at ordinary times, install and use simple;

2. each electron key inside all is solidified with only 64 the read-only type identification numbers (ID) in the whole world, puts in order to be followed successively by 8 of 8 of classification numbers, 48 of series numbers and CRC sign indicating numbers, the permanent preservation, can not change and lose, and have self-destroying function, can't copy, security performance is good;

3. different with the like product of selling on the market, it makes the shape of normal key with DS2401 key chip, not only has impact resistance, anti-water stainly, corrosion-resistant, diamagnetic disturbs, anti-distinguishing feature such as folding, and it is also smoothly convenient to operate simultaneously;

4. adopt the way of contact during access data, one bump gently with the contact, moment can be finished the read-write operation of data message.It is not subject to the interference of environment, and no keyhole had both had the ease for operation of non-contact IC card, had the cheapness of Contact Type Ic Card again, has security, convenience, the reliability of height.

Description of drawings

Fig. 1 is an intelligent digital controller architecture synoptic diagram;

Fig. 2 is an intelligent digital controller master routine software flow pattern;

Fig. 3 is that the intelligent digital controller channel is selected software flow pattern;

Fig. 4 is an intelligent digital controller countdown software flow pattern;

Fig. 5 is an intelligent digital controller key Interrupt Process software flow pattern;

Fig. 6 is that the intelligent digital controller is provided with key interrupt software process flow diagram.

Embodiment

Intelligent digital controller controlling schemes is:

To be control chip EM78P257AP read in the internal information of correct key by the contact to CPU, sends control signal drive motor/electromagnet running after driver module amplifies, and drives control object terminal.Its additional function also has primary and secondary keys management (add or delete sub-key), undervoltage warning (supply voltage is lower than then alarm of threshold voltage), low-power consumption sleep (system kept sleep state when no external event triggered), channel status is selected (selecting motor for often opening/normally off), emergent charging function etc.

Its groundwork process (as shown in Figure 1) is: CPU identifies recognition coding in the inner DS2401 chip of key by the lead that is connected with the contact, compare with the key code that is stored among the EEPROM, if unanimity is then sent control signal drive motor or electromagnet, to drive control object terminal.CPU also can write down specific key code under given conditions, reaches the purpose that owner independently changes key.Partial circuit module (as shown in Figure 2) is described below:

The key data interface

When key chip and circuit touched, control chip can receive the data of external key chip by a lead.

Low pressure detection alarm module

Utilize the switching characteristic of triode and the dividing potential drop of resistance, convert the size of analog quantity to digital signal easily, offer single-chip microcomputer and judge, wherein threshold voltage can be set by regulating the divider resistance resistance.This scheme circuit is simple, realize easily and low-power consumption, cost low.

Driver module

Make full use of the IO mouth line of CPU,,, adopt scm software to realize control procedure according to calculating the good level value and the corresponding relation of motor status by triode control and driving bidirectional, dc motor.

The emergent charging circuit

At the two ends of input power supply and be connected to the electrochemical capacitor of a 2200uF, available external battery serial connection is charged to electric capacity when running down of battery after, and this electric capacity is full of can provide normal working voltage to circuit afterwards at short notice, and power supply machine turns round once.

Channel selecting module

The passage button links to each other with CPU mouth line, can conversion export high/low level signal by stirring of button, offers CPU, channel status is handled by software again.

Control chip EM78P257AP main performance:

Operating voltage range: 2.3V is to 5.5V

Frequency of operation: reach as high as 20MHz, when power supply was 3V, highest frequency was 4MHz/2clks under the RC mode of oscillation

Low-power consumption: less than 1.5mA, representative value is 1uA under the sleep pattern when 5V/4MHz

Built-in RC oscillator (4MHz, 1MHz, 455KHz, 32.768KHz)

Independently programmable WDT removes device in advance

The 80*8 on-chip SRAM, general-purpose register

ROM in the 2K*13 sheet

Two-way IO mouth

8 grades of storehouses are for subroutine nesting

8-bit real time clock counter (TCC) can be selected signal source and trigger the edge, and the interruption of overflowing is arranged

5 independent interrupt sources

8 programmable pull-up IO pin

8 open-drain IO pin able to programme

The cost performance height

Storer AT24C01A-10SC-27 main performance

Operating voltage range 2.7-5.5V

Memory capacity: 128*8bit

Interface: two-wire serial i 2C interface

The write data time: the longest 10ms

High reliability: 1,000,000 write number of times, 100 year holding time

Key chip DS2401 main performance

Operating voltage range: 2.8-6.0V

Globally unique 64 photoetching sign indicating numbers (8 series numbers, 48 bit sequence number, 8 CRC check sign indicating numbers)

The TO-92 encapsulation

Zero-power during hang-up

One line system communication, top speed are 16.3Kbit/s

Specifeca tion speeification

Operating voltage	DC2.3V is to 5.5V, with No. 5 powered battery of three joints
		Under-voltage indication	DC3.1V soil 0.2V (can adjust)
Urgent charging voltage	4.5V, save above No. 5 battery charge 5 seconds with 3
		But minimum drive motor voltage	(2.3V deciding) on motor/electromagnet parameter
Quiescent current	51.4uA
		Moment maximum current	120mA
The motor-driven time	5 seconds (can adjust)
		Maximum sub-key number	16
Working temperature	0 ℃ to 70 ℃

Software flow

The software flow of master routine as shown in Figure 2 in the microcontroller chip, program is carried out the initialization of system and each variable earlier after powering on, afterwards if outside no incident triggers, then program enters sleep pattern, if external event is arranged, as key contact or button is set presses, then wake sleep up, carry out master routine.If key is set to be pressed, represent that then the operator will be provided with the key authority, program will be carried out the judgement and the processing of corresponding mother key/sub-key; If in normal operating conditions, then program is judged the key signal that reads in, and then sends control signal corresponding.

The channel selecting module of being called during the major cycle (Fig. 3), countdown module (Fig. 4), key interruption processing module (Fig. 5) and key module (Fig. 6) program circuit is set is described below respectively.

As shown in Figure 3, by detecting the closure of judging the external channel switch, sending corresponding signal control motor is Chang Kai or normally off.

As shown in Figure 4, utilize the TCC clocking capability of microcontroller chip internal, calculate the time interval of twice contact of mother key contact automatically,, then remove corresponding marker bit and disabled interrupt if timing time arrives.As shown in Figure 5, the key signal inserts the interruption of chip, and the every contact of key contact once just produces a look-at-me and wakes single-chip microcomputer up, puts zone bit DS_SIGN simultaneously, and control chip reads in the data of DS2401 to respective pin again.

As shown in Figure 6, the interrupt function that key has also utilized chip is set, detecting after program is waken up is key to be set press, and then writing down a zone bit SET_SIGN is that mother key is provided with sign, allows TCC to interrupt simultaneously, for the time judgement of son/mother key is prepared.

Claims (2)

1. intelligent digital controller, it is characterized in that it has control chip, control chip and is connected with key data interface, storer, low pressure detection alarm module, driver module, emergent charging circuit, channel selecting module respectively, the key data interface is connected with the key chip, and driver module is connected with Zhi Liudianji electromagnet.

2. a kind of intelligent digital controller according to claim 1 is characterized in that said key chip adopts DS2401 key chip.

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