CN2831146Y - Antistatic wrist worn states central monitor - Google Patents
Antistatic wrist worn states central monitor Download PDFInfo
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- CN2831146Y CN2831146Y CN 200520027758 CN200520027758U CN2831146Y CN 2831146 Y CN2831146 Y CN 2831146Y CN 200520027758 CN200520027758 CN 200520027758 CN 200520027758 U CN200520027758 U CN 200520027758U CN 2831146 Y CN2831146 Y CN 2831146Y
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- wrist strap
- antistatic wrist
- situation
- slave computer
- worn
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Abstract
The utility model relates to an antistatic wrist-worn state central monitor based on the SCM master-slave communication mode, comprising an upper machine, a plurality of lower machines and peripheral circuits of the lower machines. The upper machine is equipped with a plurality of RS485 serial communication interfaces which are respectively linked with a plurality of lower machines. The lower machines are positioned at antistatic wrist-worn state monitoring points on individual produce-operation post. Each lower machine is provided with a unique address. The upper machine conducts polling to the selected monitoring points by the RS485 serial communication interface. The lower machine monitors the antistatic wrist-worn state. When the upper machine conducts polling to the corresponding lower machine, the lower machine sends the antistatic wrist-worn state to the upper machine. Adopted with the antistatic wrist-worn state central monitor provided by the utility model, an administrator can monitor simultaneously all antistatic wrist-worn states of all operating staff to implement the effective general management of the production in time.
Description
Technical field
The invention belongs to and relate to a kind of ESD-preventive wrist strap and wear state monitor.
Background technology
For electronic product manufacturing enterprise, systems for providing electrostatic discharge protection is the basic engineering of enterprise's production system, is the guarantee of product high reliability.In view of the susceptibility of microelectronic component, for guaranteeing the reliability of microelectronic component in the courses of work such as production, debugging, installation, must take the electrostatic defending technical measures to it, to guarantee the high-quality quality of product in each link to static.
Human body contacts with object beyond the health or the friction of self locker room at work, can produce static on human body, causes that human body is charged.In a word, people's cognition is with static by all means.After human body had accumulated certain static, its transient potential amplitude can reach more than 2～4kV, if such current potential is added on the electron device, was extremely serious to the harm of electron device, as caused the puncture of semiconductor devices, misoperation of instrument and equipment or the like.At present, electronic product manufacturing enterprise in order to prevent the method that the static electricity on human body generally adopts is, requires operating personnel must wear anti-static clothing and wears ESD-preventive wrist strap, also wears electrostatic prevention ankle band sometimes.
In electronic product was produced, operating personnel did not wear antistatic wrist strap, wear incorrect, the wrist strap loose contact, phenomenons such as wrist strap connecting line fracture happen occasionally, and the electronic product ordinary production is brought huge hidden danger.Wear condition monitoring device product so released antistatic wrist strap on the market.It only is that independent ESD-preventive wrist strap of an antistatic wrist strap connection is worn state monitor that present antistatic wrist strap is worn condition monitoring device product.When workshop is big, when operating personnel disperseed, managerial personnel can't monitor the situation of wearing of all operations personnel antistatic wrist strap simultaneously, and general management production is timely and effectively brought many inconvenience.
Summary of the invention
The utility model provides a kind of antistatic wrist strap based on single-chip microcomputer master-slave communication pattern to wear the situation centralized monitor, monitoring simultaneously is distributed in operating personnel's antistatic wrist strap of production scene and wears situation, in time the locking antistatic wrist strap is worn abnormal production operation post, to solve an above-mentioned difficult problem.
Antistatic wrist strap of the present utility model is worn the situation centralized monitor, comprise the host computer and Duo Tai slave computer and the peripheral circuit thereof that communicate by the RS485 serial communication interface, it is characterized in that, at least be provided with one group of RS485 serial communication interface on the host computer, on its every group of RS485 serial communication interface respectively chain be connected to 0 or many slave computers, slave computer is positioned at each production operation post antistatic wrist strap and wears on the monitoring point of situation, every slave computer has unique address,, by the RS485 serial communication interface selected monitoring point is patrolled and examined by host computer; Slave computer has the A/D analog to digital converter, and its peripheral circuit comprises that the reflection antistatic wrist strap wears the electrostatic potential pre-process circuit of situation, and the potential value of this pre-process circuit produces antistatic wrist strap and wears state value through after the A/D analog to digital conversion of slave computer; When host computer is patrolled and examined corresponding slave computer, by slave computer antistatic wrist strap is worn state value and send to host computer.
Slave computer of the present utility model can independently be exported the status signal of wearing of antistatic wrist strap, and host computer then can concentrate the output antistatic wrist strap to wear status signal.Slave computer is worn the situation value according to antistatic wrist strap, shows to wear situation and judge whether in place, monitoring point control display device and reports to the police; Wear state value by host computer according to the antistatic wrist strap of each monitoring point of receiving, wear the situation centralized displaying and make the judgement of whether reporting to the police.
The beneficial effects of the utility model are: the antistatic wrist strap that (1) adopts the utility model to provide is worn the situation centralized monitor, can make managerial personnel monitor the situation of wearing of all operations personnel antistatic wrist strap simultaneously, realize production general management timely and effectively; (2) the RS485 serial communication interface technology that adopts twisted-pair feeder to connect realizes concentrating monitoring function, has that antijamming capability is strong, wiring is simple, expansion is easy to characteristics; (3) slave computer can be independent of host computer work, has improved system reliability.
Description of drawings
Fig. 1 is the syndeton block diagram between host computer inner structure and host computer and 256 slave computers
Fig. 2 is a host computer communications portion schematic diagram
Fig. 3 is a slave computer inner structure block diagram
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Antistatic wrist strap of the present utility model is worn the situation centralized monitor and is made of a host computer and Duo Tai slave computer, the PIC16F73 chip that the single-chip microcomputer in the upper and lower machine all adopts MICROSHIP company to produce.Contact between the upper and lower machine is based on the master-slave communication pattern, every slave computer has unique address, the host computer active inquiry has the unique address slave computer, slave computer is worn situation with the antistatic wrist strap of this machine and is uploaded to host computer, realizes the remote centralized monitoring of situation that a plurality of production operations post antistatic wrist strap is worn.
Fig. 1 has provided the syndeton block diagram between host computer inner structure and host computer and 256 slave computers.Antistatic wrist strap is worn the situation centralized monitor and is made of a host computer and Duo Tai slave computer two parts.
1. the function of host computer mainly comprises: set, communicate by letter, show and report to the police.
1. setting section.Adopt the RB0 port of PIC16F73 single-chip microcomputer and the interrupt function of RB4～RB7 port, these 5 ports are connected draw resistance and button, the button other end links to each other with ground.Like this in case push button, RB mouth level will be by high step-down, thereby causes RB mouth or external interrupt.Can change that to distinguish be the interruption which button causes by inquiry RB mouth level, thereby realize selection the production operation post of needs monitoring, and with the content stores set to exterior I
2C bus Serial E
2In the prom memory.
2. communications portion.The schematic diagram of communications portion as shown in Figure 2.Adopt the communication protocol of RS485 serial communication interface.Because the slave computer number is a lot, and considers the driving force of MAX487 chip, host computer is provided with 8 groups of RS485 serial communication interfaces altogether.Select a multiway analog switch chip to link to each other by 3 CD4051 eight respectively with receiver/driver Enable Pin RT receiver output terminal RX, the driver input end TX of 8 MAX487 chips with the corresponding RC7/RX of PIC16F73 single-chip microcomputer, RC6/TX, RC5.Output pin RC1, RC0, RB1 by the PIC16F73 single-chip microcomputer select address pin A, B, the C of a multiway analog switch chip to link to each other with 8 CD4051 eight respectively.Carry out the RS485 serial communication by a certain group in the address of A, B, C decision PIC16F73 and 8 groups.Consider the size of electron production scope of the enterprise, also specially be provided with and select production operation post group to count three toggle switchs of scope, one end of three toggle switchs links to each other with input pin RA0, RA1, the RA2 of PIC16F73 single-chip microcomputer after respectively connecting pull-up resistor, and the other end of three toggle switchs links to each other with ground.Input pin was not a high level when toggle switch was not put through, and input pin is a low level when putting through.According to the state of the RA0 that configures in advance, RA1, RA2 port toggle switch, and decision CD4051 address realm (000B～111B), thus the scope (1～8) of decision host computer monitoring production operation post group number.So just, can adapt to different production scales by changing the state of toggle switch.
3. display part.Adopt three 7 section LED charactrons to show production operation hilllock item; Use a three-color LED, when setting, be used to show the production operation post monitoring point setting situation of needs monitoring: green expression needs monitoring, and red expression does not need monitoring.Adopt the method for cascade to arrange a plurality of three-color LEDs by the production scale decision, all corresponding fixing production operation post of each three-color LED is used to show that each fixing production operation post antistatic wrist strap wears situation: just often, show green; Operation site is temporarily left the post and has been done setting at slave computer, shows yellow; When undesired, show red.Also be provided with alarm buzzer simultaneously, when abnormal conditions appears in arbitrary production operation post monitoring point, buzzer call is reported to the police.Utilize the CD4094 serial shift register of multi-disc cascade to drive, a slice CD4094 can drive 8 sections LED.Use the CD4094 serial shift register of multi-disc cascade mode work to drive, the field size of electronic product manufacturing enterprise increases and decreases the LED display part flexibly very easily.
2. slave computer inner structure block diagram as shown in Figure 3.The function of slave computer mainly is when the improper use of antistatic wrist strap and the phenomenon that occurs suspending, or production operation post current potential is too high, just can detect automatically, red, yellow, the green alternately flicker of three-color LED, buzzer warning simultaneously.Just often three-color LED shows green.When host computer RS485 serial communication inquires corresponding slave computer, slave computer operating post antistatic wrist strap of living in to be worn situation upload to host computer, the realization antistatic wrist strap is worn situation and is concentrated monitoring.
The PIC16F73 chip that the single-chip microcomputer of slave computer adopts MICROSHIP company to produce, the MAX487 chip that RS485 serial communication interface chip adopts MAXIM company to produce.The address of slave computer is set by 5 toggle switch, and 32 addresses can be set altogether, and just in time 256 production operation posies of satisfying the working site are divided into 8 groups, the address space of every group of 32 operating posts.Utilize integrated A/D converter structure in the PIC16F73 chip, the A/D that carries out that the slave computer antistatic wrist strap is worn the current potential of situation and the output of wrist strap electrostatic potential analog quantity pre-process circuit gathers.According to the analog to digital conversion result, judge that whether normal wrist strap wear, show accordingly by the three-color LED pilot lamp then and whether report to the police.Antistatic wrist strap is worn situation just often, and LED shows green; When operation site operating personnel temporarily leave the post, can do " leaving the post " by switch at slave computer and set, then LED shows yellow; When undesired, red, yellow, green three looks of LED are flicker alternately, and buzzer warning in time points out the site operation personnel to correct improper activity simultaneously.
Antistatic wrist strap is directly worn state monitor with the on-the-spot antistatic wrist strap of slave computer by plug and is connected.Slave computer has terminals to receive on the electrostatic prevention ground wire.The antistatic wrist strap plug with " " between have equivalence to be connected in series the resistance of 1M Ω.Do like this be for prevent the electrostatic leakage excessive velocities, leakage current is excessive that electrostatic sensitivity device is caused damage.It is different with " hard ground connection " of antistatic wrist strap and production equipment and instrument, serial connection 1M Ω resistance just guarantee to " " leakage current is limited in below the 5mA.This earthing mode is called " soft touchdown ", this also be for handling safety designed.If operating personnel in systems for providing electrostatic discharge protection, touch 220V industry voltage because of carelessness,, can not bring danger because the metering function of 1M Ω resistance is arranged yet.
The on-the-spot antistatic wrist strap of slave computer wears that state monitor can not be connected with upper machine communication and use separately.
Claims (2)
1. an antistatic wrist strap is worn the situation centralized monitor, comprise the host computer and Duo Tai slave computer and the peripheral circuit thereof that communicate by the RS485 serial communication interface, it is characterized in that, at least be provided with one group of RS485 serial communication interface on the host computer, on its every group of RS485 serial communication interface respectively chain be connected to zero platform or many slave computers, slave computer is positioned at each production operation post antistatic wrist strap and wears on the monitoring point of situation, every slave computer has unique address,, by the RS485 serial communication interface selected monitoring point is patrolled and examined by host computer; Slave computer has the A/D analog to digital converter, and its peripheral circuit comprises that the reflection antistatic wrist strap wears the electrostatic potential pre-process circuit of situation, and the potential value of this pre-process circuit produces antistatic wrist strap and wears state value through after the A/D analog to digital conversion of slave computer; When host computer is patrolled and examined corresponding slave computer, by slave computer antistatic wrist strap is worn state value and send to host computer.
2. antistatic wrist strap according to claim 1 is worn the situation centralized monitor, it is characterized in that, slave computer is worn the situation value according to antistatic wrist strap, shows to wear situation and judge whether in place, monitoring point control display device and reports to the police; Wear state value by host computer according to the antistatic wrist strap of each monitoring point of receiving, wear the situation centralized displaying and make the judgement of whether reporting to the police.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520027758 CN2831146Y (en) | 2005-10-11 | 2005-10-11 | Antistatic wrist worn states central monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520027758 CN2831146Y (en) | 2005-10-11 | 2005-10-11 | Antistatic wrist worn states central monitor |
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| Publication Number | Publication Date |
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| CN2831146Y true CN2831146Y (en) | 2006-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520027758 Expired - Fee Related CN2831146Y (en) | 2005-10-11 | 2005-10-11 | Antistatic wrist worn states central monitor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101677288B (en) * | 2008-09-17 | 2012-08-29 | 伟林电子股份有限公司 | Remote communication method of Internet and system thereof |
| CN107239286A (en) * | 2017-06-05 | 2017-10-10 | 深圳联合净界科技有限公司 | A kind of safety management system based on ESD IoT |
| CN107733462A (en) * | 2017-11-09 | 2018-02-23 | 山东船舶技术研究院 | Multiline message communication monitor module |
| CN111157914A (en) * | 2019-12-26 | 2020-05-15 | 通富微电子股份有限公司 | Anti-static grounding wire monitoring device and integrated circuit testing system |
-
2005
- 2005-10-11 CN CN 200520027758 patent/CN2831146Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101677288B (en) * | 2008-09-17 | 2012-08-29 | 伟林电子股份有限公司 | Remote communication method of Internet and system thereof |
| CN107239286A (en) * | 2017-06-05 | 2017-10-10 | 深圳联合净界科技有限公司 | A kind of safety management system based on ESD IoT |
| CN107733462A (en) * | 2017-11-09 | 2018-02-23 | 山东船舶技术研究院 | Multiline message communication monitor module |
| CN107733462B (en) * | 2017-11-09 | 2020-06-30 | 山东船舶技术研究院 | Multi-channel information communication monitoring module |
| CN111157914A (en) * | 2019-12-26 | 2020-05-15 | 通富微电子股份有限公司 | Anti-static grounding wire monitoring device and integrated circuit testing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061025 Termination date: 20091111 |