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Digital control of machine tools, NC machine tool ( NC, NumericalControl ), thirty years of general application of mechanical, electrical, hydraulic, pneumatic electromechanical integration products, microelectronics and information technology as a whole, in the modern machine tool production, generally use more electric machine drive, the spindle and feed system respectively by the respective motor to drag. Because the machining range is wide, different parts, different processes, using different cutting tools, machine requirements implementation components with different speed, so the main machine can carry out stepless speed, spindle speed control system generally adopts AC spindle system, along with the development of inverter technology, CNC Machine Tool Spindle AC drag, also can be very good to meet the needs of. The main drive motor drives the main shaft to rotate through a belt drive, or through a belt and spindle box gear (to obtain greater torque to drive the rotation of the spindle ). Due to the spindle motor speed range is wide, and stepless speed regulation, which simplifies the structure of the main axle box teco electric motor ac.

Two requirements of CNC machine tool technology.

1, requirements for the motor

Usually require the use of variable frequency motor, or the general motor and fan motor in low frequency to meet the cooling requirements, and requirements for motor speed range teco dc motor speed control.

2, the frequency converter technology

Low frequency torque requirements

Low frequency ( 1~10Hz ) energy out of 150% rated torque.

Torque dynamic response speed, steady speed precision

Can realize the dynamic response to good effect, on the basis of the change of the load, the variation of the output torque fast response, so as to realize the stable rotating speed.

Stop speed

Usually numerical control machine tool acceleration and deceleration time is relatively short, acceleration time by transducer performance guarantee, deceleration time depends on external resistor braking or braking unit.

High reliability

Inverter fault rate is low, stable and reliable operation

3, the electromagnetic compatibility problem

CNC machine tool for the industrial application environment, requires not only the inverter's own strong anti-interference ability, and can not interfere with peripheral control equipment. The working principle of the inverter output frequency converter, harmonic components must, in use, if improper handling may cause interference with other equipment, equipment is most easily in NC machine tool interference is CNC controller. Once the CNC controller after disturbance, the system will not work properly. Especially the frequency instruction and operation instruction converter may also be affected by the interference, interference will cause serious frequency instability, inverter fault action. To solve this problem is formulated in frequency converter factory must undergo a rigorous test of the EMC, using EMC test qualified inverter products PC Remote Control.

Three. The system.

To configure.

Converter: a enlightenment GP400 series high performance vector -7.5KW

Braking resistor: 8– 0Ω /750W

7.5KW variable frequency adjustable speed motor

A, flexible deployment

Huicong security network due to the use of network architecture, between the monitoring equipment with NVR can be any IP network through the internet. Therefore, in the NVR system, an arbitrary position monitoring point can be located in the network, and achieve rapid deployment, not subject to geographical restrictions ipazzport Fly mouse.

While the DVR system, between the monitoring point and the center of DVR by means of simulation interconnection, affected by the transmission distance and the analog signal loss, monitoring point position has great limitations, unable to realize remote deployment.

Two, the wiring is convenient, low cost

Center point:

NVR only then 1 cable wiring, installation can be completed, and access all monitoring points all control signal; and DVR for each monitoring point cloth video, audio, control and alarm of multiple cable. So NVR in the center of wiring and maintenance is very simple, convenient ipazzport PC remote.

Monitoring point:

Monitoring of NVR network hard disk video recorder system was a IP front end, and therefore only 1 cable wiring can be completed, and through the IP network access center of NVR; and the front end of the DVR system for analog devices, each monitoring front-end to the center need to video, audio, control and alarm multi-channel signal cable. Therefore, the front wiring NVR system is very simple, and the wiring cost is very low, the existing network ipazzport Air mouse.

The use of PoE technology, NVR network hard disk video recorder system IP front-end equipment of the power supply can also through the Ethernet, and through the IP front output power signal, as other peripheral equipment power supply, which can be further simplified wiring. The front end of the DVR system must be single power supply, PoE power supply can not realize.

For monitoring point is not convenient wiring, wireless transmission of wireless IP front of subordinates can make monitoring signal, no wiring. The front-end DVR system for analog devices, not wireless deployment.

Three, installation is simple

An important advantage of DVR attract contractors is setup is simple, without complicated configuration. NVR network hard disk video recorder also has the advantage, but also more convenient.

Central NVR equipment and remote monitoring point IP front-end equipment only plugged in, turn on the power, then all processes can be automatically completed, including automatic search all front-end equipment, automatic NVR external display device automatic multi-picture display all monitoring points image using IP address allocation, front-end equipment t.dvbmanufacturer.com.

Therefore, NVR innovation realization network video monitoring system in the installation of plug-and-play. Project developers and users need not worry about network monitoring brings difficulty to its deployment.

1 ) connected, open the power supply cable

2 ) automatically search all IP front-end equipment, and dynamic allocation of IP address

3 ) automatically local screen all front-end display

Four, flexible and reliable storage

One of the features of convenient DVR video storage also attract engineering business. Video storage characteristics of convenient NVR also have highly integrated, the local hard disk, can achieve centralized storage, but also can satisfy the demand for mass storage by expanding peripheral storage devices.

Further, the IP front-end equipment NVR system can also support the front storage through the deployment, storage mode to provide a more flexible, and can realize the storage and driving recorder center storage backup of storage reliability requirements, meet the application requirements are very harsh. While the front end in the DVR system for analog devices, unable to realize the front storage.

Five, security and encryption

Many people think that the network video monitoring system is not safe, in fact, NVR is more secure than DVR. In the NVR system, IP front-end upload stream can be AES encryption on the stream, intercepted even in the network, also cannot decode. The analog video, DVR front-end upload audio signals without any encryption mechanism, can easily be intercepted and displayed. In addition, authorization, the telecom user authentication mechanism, NVR can effectively prevent illegal user login system.

When going to a hot pot restaurants to eat hot pot, attentive waiter will give you a coat with sets of things, lest the clothes are chafing dish taste, but his clothes still have a bad taste, Cheap baby clothes is most partents systemic change of home and find it very troublesome, Claire Hsu so how should I do?

When going to a hot pot restaurants to eat hot pot, attentive waiter will give you a coat with sets of things, lest the clothes are chafing dish taste, but his clothes still have a bad taste, Protective Case systemic change of home and find it very troublesome, so how should I do?

Some people specially on the Internet for a spray, to the body of a spray, hot pot flavor Baby wear online need know some advise will disappear not the least trace was found. According to one person bought while the effect is obvious, but the price is a little expensive.

Many chowhound said, actually remove hot pot flavor does not need such a high cost, clothes can be get the outdoor air hanging on the night, can remove the smell, Otterbox phone case and for the people with long hair, the best hair tied up, or into the hat.

In fact, there is a lemon to taste, is the fresh lemon drops into the water, and then make a spray for spraying in clothes and hair, buy from baby clothes online with rapid evaporation lemonade to take strong hot pot flavor, it should be noted here is lemon juice not to drop too much, 1-2 drops.

At present, currency counting machine is used more and more widely, but the bank commonly used equipment, but also gradually become the cash flow of the enterprises and institutions necessary office equipment. Now the currency counting machine general structure miniaturization, simple, durable, dba5a06dk and achievement counting machines is a photoelectric sensor, photoelectric sensor is the necessary cash registers .

Counting machine, accurate collection bill number is the key detector count, must ensure that the bill number can not be omitted, this counter currency count machine adopts the non-contact infrared photoelectric detection technology, has the advantages of simple structure, high precision and fast response etc.. Counting sensor for currency count machine adopts two groups of infrared photoelectric sensor. Each sensor consists of an infrared emitting diode and a receiving infrared phototransistor, there is a proper distance is left between the, when no bill through, receiving tube by the light and conduction, the output of 0. When there is money through the moment, blocking the infrared receiving tube, luminous flux, the output of 1. The bill passed, and received the infrared receiving tube conduction. This generates a pulse signal at the output end of the signal circuit, the circuit shaping amplifier input after the MCU, MCU driving motor, and complete the count and display. Counting machine adopt two sets of photoelectric sensor, in order to avoid the integrity test paper, banknote is included in the .

Through the photoelectric sensor to detect the cumulative count of money and then realize the bill number, the liquid crystal and the external display intuitively the bill number is displayed to the user, and the abnormal can automatically alarm to users. With the development of commercial economy and financial system, the performance of the photoelectric sensor must be further improved to meet the requirements PC Remote Control.

Dynamic balance and static management in recent years, the car has become a new topic of many experts and scholars focus. In order to ensure the safety and convenient traffic, there is an urgent need for a high degree of automation, convenient parking automatic management system, improve the parking management level. The aim is to provide to meet the people's work, life, surface light solar cell entertainment environment more scientific, standardized, efficient, safe, convenient and intelligent parking automatic management system. Parking system is to the large-scale, complex, integrated and high-tech development direction, has been incorporated into an important subsystem of intelligent building, and with other subsystem of intelligent building further highly integrated.

The intelligent parking management system uses advanced technology and highly automated electromechanical equipment, electronic computer and automation equipment and intelligent IC card technology organically combined with mechanical, together, through the computer management can realize vehicle access control, automatic data storage and other functions, the offline and provides efficient management service system.

Combined with the intelligent parking new life philosophy and architecture, information technology, computer technology and modern high-tech perfect, provides a simple operation, convenient use, advanced humanized system. It relies on high-tech, people-oriented, using the graphical man-machine interface operation, to provide a safe, comfortable, convenient, fast and open intelligent, information-based living space, attractionlandscape.com/playground.html and promote the healthy development of the cultural environment.

1, the current domestic and foreign parking mainly has the following several types

The 1.1 plane parking system

The plane parking system because of its mainly adopts inductive IC card reading mode, so it is also called the induction type parking system. At present, our country is still in the parking lot of plane parking, underground layer generally built in the building, there are also many in public areas such as square, road side such as parking, the second is the hotel car park, enterprises, factories and other units own planning and design.

1.2 mechanical parking

Mechanical parking is a parking entirely by mechanical parking equipment such as traction drive machine, a guide wheel, a car carrying board, the traversing device, control cabinet, operation panel, call turning device, handling device. Divided into lifting class, vertical circulation, circulation, multilayer circulation, plane moving type, vertical lifting, simple movements such as type. Because of its unique parking modes, and has a strong application. The utility model has the advantages of small occupation area, selection diversity combining site, specific design features, can also be combined with other methods to implement, high degree of automation, convenient operation, management and maintenance is also more easily, has the characteristics of quantitative car.

1.3 intelligent three-dimensional garage

Intelligent parking system is also called the vertical lifting mechanical parking system or elevator type parking system. It is the intelligent system set equipment, operation, security, monitoring, maintenance, management as a whole, touch screen man-machine interface, operation and use are convenient, the intelligent management and charging system. The intelligent detection of height and perfect service system can realize zero fault operation. It is the biggest characteristic of original time-sharing control function, realize the time-sharing, layered parking control, effectively improve the utilization ratio of parking spaces. The realization process of vehicle access, charging through the keyboard password and IC card, simple operation, convenient access; and can be connected with the city parking charge system, online ups power can realize the parking charge card, and can be installed monitoring system and the area network. Another modular intelligent three-dimensional garage is also began to mature, not only realizes the modularization design, the intelligent control technology, but also makes full use of solar energy technology, energy accumulation (energy ) technology. Modular intelligent three-dimensional garage is no longer a whole building, which is composed of independent and module combination, such as parking spaces, lifting device, intelligent vehicle such as disperse parts, built as long as like as the building blocks of each parts, has become a standard stereo garage, has the advantages of saving time, low cost.