CN202634617U - Full-function-type intelligent video monitoring test device based on PIC-series single-chip microprocessor - Google Patents
Full-function-type intelligent video monitoring test device based on PIC-series single-chip microprocessor Download PDFInfo
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Abstract
The utility model provides a full-function-type intelligent video monitoring test device based on a PIC-series single-chip microprocessor. The full-function-type intelligent video monitoring test device based on the PIC-series single-chip microprocessor can be used for installing, adjusting, maintaining and testing a video monitoring device. The full-function-type intelligent video monitoring test device based on the PIC-series single-chip microprocessor belongs to an application of technology of embedded system based on a PIC single-chip microprocessor in aspects of security monitoring equipment, and solves a problem that the video device is difficult to adjust and control. The full-function-type intelligent video monitoring test device based on the PIC-series single-chip microprocessor mainly realizes nine functions of video arrangement, holder rotation control, color bar generation and testing, connection state and line sequence testing of network cable, RS485 data monitoring, tester arrangement, PTZ holder address scanning, universal meter functions, light strength signal testing and the like. The shape of the full-function-type intelligent video monitoring test device based on the PIC-series single-chip microprocessor is a roughly cuboid and the full-function-type intelligent video monitoring test device based on the PIC-series single-chip microprocessor is composed of a housing, press buttons, a PCB and multiple interfaces. The PCB adopts a modularized design and the single-chip microprocessor is taken as the core to control the work of all peripheral modules. The interfaces include an audio interface, an RS 485 interface, a video interface, a 5V DC power source interface, a 12V/1A DC power source interface, a UTP network cable interface, a universal meter interface and a light power meter interface.
Description
Technical field
The utility model relates to a kind of video measurement device of test video information, the especially performance of energy measurement light end equipment, measuring DC voltage, alternating voltage, direct current, alternating current, resistance measurement, on off test, diode measurement, capacitance measurement, be provided with video parameter, control The Cloud Terrace rotate, produce with test colour bar, test netting twine break-make with line preface, supervision RS485 data, scan PTZ The Cloud Terrace address, the intelligent video monitoring tester of tester be set.
Background technology
At present; Known video monitoring tester has tester shell and inner main PCB plate, 5V input power interface, the interim out-put supply interface of 12V/1A, RS485 interface, video input/output interface, RS232 interface, audio input interface, matrix press-key and reset key, RJ45 netting twine test interface, LCDs, netting twine testing cassete and inside from pcb board, and two pcb boards all pass through interlock circuit and external interface maintenance UNICOM.Principal and subordinate's pcb board couples together external equipment and tester through the connecting line that closes earlier by the running of Single-chip Controlling master control module and each sub-function physical module, and through button operation, can realize required function.
But current existing video monitoring tester is not enough to satisfy people's demand, also has some functions can realize needing to improve with many problems.Existing tester does not possess functions such as light end device measuring light end equipment, electric current, voltage, resistance, appearance value, diode, break-make, makes troubles to test.External power supply is when being lithium cell charging, owing to the charging control circuit that does not have response, to such an extent as to cause lithium battery owing to being recharged excessive burning out.The capacity of lithium battery is too small, and the initial work of tester causes operating time the cross section of tester when output 12V/1A up to 3.7V.RS485 interface and RS232 interface are unreasonable in the Position Design of tester surgery, cause inconvenient operation.Current tester screen mess code often occurs in the display menu formula, and the demonstration of outside input video and self color bar signal is unintelligible, and this causes owing to hardware designs and software coding two aspects, also need improve.The button implementation of some tester is unreasonable, and button effort and operating portion are sensitive.In addition, it is very few that the parameter of some testers is provided with the too small PTZ control protocol with support of scope in addition, causes the applied environment of tester limited.
Summary of the invention
Excessive for the limitation, the lithium cell charging that overcome existing video monitoring tester function, operating voltage is high, Interface design is unreasonable, display screen mess code, colour bar and video show the deficiency unintelligible, that button is insensitive, parameter area is little and the PTZ control protocol is few; The utility model provides a kind of novel full function intelligent video monitoring tester; This tester not only can measuring light end equipment performance, measuring DC voltage, alternating voltage, direct current, alternating current, resistance measurement, on off test, diode measurement, capacitance measurement, stable realize being provided with video parameter, control The Cloud Terrace rotate, produce with test colour bar, test netting twine break-make with line preface, supervision RS485 data, scan PTZ The Cloud Terrace address, tester be set; And easy operating; Stable and reliable for performance; Power consumption is low, and is sturdy and durable.
The utility model solves the technical scheme that its technical problem adopted: control the ES51967P chip to realize universal instrument and light power meter function based on the PIC series monolithic; The universal instrument test interface has been realized tests such as combined-voltage, ac and dc current, resistance, electric capacity, diode, break-make, and the light power meter test interface has been realized the accurate measurement of 850nm～1550nm wavelength; With single-chip microcomputer PIC18F67K22 as its microprocessor; The work of all chips in the control system; Operating voltage is 3.3V, and the external crystal-controlled oscillation of employing is 11.0592MHz, realizes the ICSP programming through two pins; Single-chip microcomputer is through the operate as normal of a plurality of other integrated chips of single pin control, and single-chip microcomputer cooperates functions such as realizing RS485/RS422 serial communication, AD conversion, keypad tone and audio frequency amplification through internal module, a plurality of pin and other integrated chips; This global function intelligent video monitoring instrument has dual power supply and abundant height voltage conversion function; Instrument is supported the power supply of 5V external power supply and two kinds of supply power modes of 3.7V/2500mA lithium battery power supply, converts 3.3V and 1.8V voltage into and supplies integrated chip pin and kernel work; The voltage that converts 12V/1A into converts 18V voltage into and supplies liquid crystal display screen work with the work of casual labour's external camera; Full function intelligent video monitoring tester based on the PIC series monolithic has the also logical output of stable video I/O, video, produces the function of colour bar vision signal, OSD menu; Instrument adopts video decoding chip TW8817 to realize the decoding processing to external video information, and after the character library information of stack ROM and RAM, generation meets vision signal and exports 3.7 cun liquid crystal display screen TM035CDH04 to and shows; Instrument adopts video coding chip SAA7121 to produce the color bar signal of various video standard, transfers to liquid crystal display screen via TW8817 and shows; Decoding chip and coding chip all adopt peripheral hardware crystal oscillator 27MHz as the oikocryst chip for driving work of shaking; Transformer conversion mainboard voltage be-3.3V and-4.5V universal instrument module work, and 3 pins of main control chip PIC18 are controlled measurement pattern and the measuring range of ES51967 and reader measurement result through string and conversion chip; Realize the interchange stream voltage measurement of the manual automatic range of 0-660V, the alterating and direct current flow measurement of 660uA～10A, the resistance measurement of 660ohm～66Mohm, capacitance measurement, the measurement of 0～2V forward voltage and the on off test etc. of 6.6nF～66000uF, also possessed functions such as locking demonstration, difference measurement; After external light signal was handled via two demultiplexers, the size of current of varying strength light signal was different, can be through its luminous intensity size of current value size reaction of measuring light signal; The light signal input ES51967 that selects via multichannel output thereafter, can obtain the intensity size of light signal; This instrument has been realized the light signal strength value measurement of five kinds of wavelength such as 850nm, 1300nm, 1310nm, 1480nm, 1550nm, and sensitivity is 0.001nW; The power interface of video camera and the interim out-put supply interface of 12V/1A of tester are directly coupled together, and video camera gets final product operate as normal; The RS485/RS232 of external equipment (as: The Cloud Terrace, ball machine etc.) and the RS485 interface or the RS232 interface of tester are directly coupled together, just control external equipment work or read the data of external equipment; External video equipment is received video input interface through video line, and tester can show external video; Receive video output interface to display terminal through video line, tester can be realized the also logical output of video or export the color bar signal of self to display terminal; Be connected through tone frequency channel wire external audio product device with audio input interface, tester realizes amplifying audio signal, and also holding concurrently simultaneously produces the function of keypad tone; Through RJ45 netting twine test interface, realize the function of test netting twine break-make and line preface; At last, button is as user's mutual input interface, and the user selects above required function through the control button operation.
The beneficial effect of the utility model is; The functions such as 33/4 (6600 counting) digital multimeter and light power meter of stable performance, high reliability have been realized through hardware and software design; Automatically protect when battery is full of, 3.3V low level instrument startup work, screen display is clear, support multiple colour bar form, button parameter and area covered by agreement expansion, internal circuit board and external interface reasonable in design sensitive, that support is compact, low in energy consumption; Working stability is reliable, is simple and easy to use.
Description of drawings
Be to combine accompanying drawing and embodiment that the utility model is further specified below.
Fig. 1 is the functional block diagram of the video monitoring tester of the utility model.
Fig. 2 is the circuit diagram of the microprocessor PIC18F67K22 pin assignment of the utility model.
Fig. 3 is the circuit diagram of the tester dual power supply of the utility model.
Fig. 4 is the peripheral circuit diagram of the interim video camera power supply of the 12V/1A of the utility model.
Fig. 5 is the peripheral circuit diagram that the lithium battery voltage of the utility model converts 5V into.
Fig. 6 is the circuit diagram of the liquid crystal display screen of the utility model voltage 18V backlight booster circuit.
Fig. 7 is that the lithium battery voltage step-down of the utility model is the peripheral circuit diagram of 3.3V.
Fig. 8 is that the lithium battery voltage step-down of the utility model is the peripheral circuit diagram of 1.8V.
Fig. 9 is the circuit diagram of the microprocessor online programming interface of the utility model.
Figure 10 is the peripheral circuit diagram of the micro processor leg control peripheral hardware of the utility model.
Figure 11 is the peripheral circuit diagram of the slave plate LED light of the utility model.
Figure 12 is the peripheral circuit diagram of the battery dump energy AD conversion of the utility model.
Figure 13 is the peripheral circuit diagram of the 4*4 matrix keyboard of the utility model.
Figure 14 is the peripheral circuit diagram of the matrix keyboard key-press backlight of the utility model.
Figure 15 is the peripheral circuit diagram of the serial communication RS485 of the utility model.
Figure 16 is button of the utility model and the peripheral circuit diagram that external audio frequency amplifies.
Figure 17 is the peripheral circuit diagram of the decoding chip TW8817 of the utility model.
Figure 18 is the peripheral circuit diagram of the decoding chip video input/output interface of the utility model.
Figure 19 be the utility model slave plate digitally with the peripheral circuit diagram on simulation ground.
Figure 20 is the peripheral circuit diagram of the LCDs TM035CDH04 of the utility model.
Figure 21 is the peripheral circuit diagram of the decoding chip SAA7121 of the utility model.
Figure 22 is the circuit diagram of the universal instrument test chip ES51967P pin assignment of the utility model.
Figure 23 is the power management module figure of the universal instrument pcb board of the utility model.
Figure 24 is the communication control module figure of the PIC18 and the ES51967 of the utility model.
Figure 25 is the switching circuit piece figure that the function of multimeter of the utility model is selected.
Figure 26 is the electric current and the light power meter detection module of the utility model.
At Fig. 2, PIC18F67K22. system single-chip microcomputer, RJ45. netting twine interface, RN1.47R exclusion, RN2.47R exclusion, C12.22PF electric capacity, C14.22PF electric capacity, Y1.11.0592M crystal oscillator.
At Fig. 3,5V POWER, external power interface; BATTERY, the 3.7V lithium battery; C33,47UG/10V electric capacity.
At Fig. 4, C20,20UF/10V electric capacity; C22,0.1UF electric capacity; C25,25NF electric capacity; R34,10K resistance; R37,100R resistance; C24,1UF electric capacity; C23,1UF electric capacity; L1, the 10UH inductance; R35,33R resistance; R38,33R resistance; D6, the SS34 triode; R32,88R resistance; R39,10K resistance; C21,120UF electric capacity; C19,0.1UF electric capacity; R31,0.1R resistance; R33,0.1R resistance; Output, the interim power output interface of 12V/1A; MIC2196, the pressurization control chip; SI4884, logical level FET TrenchMOS
TM
At Fig. 5, C30,1UF electric capacity; L2, the 22UF inductance; D7, the SS14 triode; R40,45.3K resistance; C26,1UF electric capacity; C29, the 10UF inductance; R41,1K resistance; MIC2287CBD5,5V supercharging chip.
At Fig. 6, R1,18K resistance; C30,1UF electric capacity; C1,10UF/20V electric capacity; L3, the 10UH inductance; D1, the BRA340T3 triode; C5,33NF electric capacity; R2,68K resistance; R4,3.6K resistance; R5,1.8K resistance; C2,10UF/35V electric capacity; ADP1613, the 18V chip that boosts.
At Fig. 7, C30, IUF electric capacity; C27,0.01UF electric capacity; C28,1UF electric capacity; SGM2007-3.3,3.3 conversion chips.
At Fig. 8, C6,1UF electric capacity; C7,0.01UF electric capacity; C8,1UF electric capacity; SGM2007-1.8,1.8 voltage transitions chips.
At Fig. 9, ICSP, online programming interface;
At Figure 10, R45,10K resistance; R42,10K resistance; R36,10K resistance; R3,10K resistance; FDS6679AZ, P-Channel PowerTrench
RMOSFET; FDG328P, P-Channel MOSFET;
At Figure 11, R17,330R resistance; R18,330R resistance; R19,330R resistance; R20,330R resistance.
At Figure 12, R46,3.6K resistance; R47,2K resistance; R47,1K resistance; R43,0.15K resistance; R28,10K resistance; R30,36K resistance; C34,0.1UF electric capacity; Q2, the TZTZ788B triode; R29,1K resistance; R48,1.5M resistance; R49,1.5M resistance.
At Figure 13, R26,10K resistance; R27,4K resistance; SW1, the thin shrapnel button; SW2, the thin shrapnel button; SW3, the thin shrapnel button; SW4, the thin shrapnel button; SW5, the thin shrapnel button; SW6, the thin shrapnel button; SW7, the thin shrapnel button; SW8, the thin shrapnel button; SW9, the thin shrapnel button; SW10, the thin shrapnel button; SW11, the thin shrapnel button; SW12, the thin shrapnel button; SW13, the thin shrapnel button; SW14, the thin shrapnel button;
At Figure 14, D1, light-emitting diode; D2, light-emitting diode; D3, light-emitting diode; D4, light-emitting diode; D5, light-emitting diode; D6, light-emitting diode; D7, light-emitting diode; D8, light-emitting diode; D9, light-emitting diode; D10, light-emitting diode; D11, light-emitting diode; D12, light-emitting diode; D13, light-emitting diode; D14, light-emitting diode;
At Figure 15, R7,1K resistance; R3,10K resistance; Q1, the MMBT3904 triode; C2,0.1UF electric capacity; R1,1K resistance; D1, the P5KE6.8CA triode; R5,120R resistance; R4,10R/1W resistance; R6,10R/1W resistance; R8,1K resistance, D2, P6KE6.8CA triode; RS485, the RS485 interface; MAX485, low-power consumption limit pendulum rate RS485/RS422 transceiver.
At Figure 16, mic, external audio frequency; R21,20K resistance; R24,24K resistance; R22,100K resistance; C10,0.39UF electric capacity; R20,100K resistance; R23,100K resistance; C7,0.01UF electric capacity; C9,1UF electric capacity; R25,47K resistance; Speaker, loudspeaker; SGM4890,1.1 watts of audio-frequency power amplifiers.
At Figure 17, C26,0.1UF electric capacity; C25,0.1UF electric capacity; C28,0.1UF electric capacity; R6,0R resistance; R7,0R resistance; R8,10K resistance; R9,10K resistance; R10,10K resistance; R12,1M resistance; Y1, the 27M crystal oscillator; R12,80R resistance; C27,20PF electric capacity; C29,20PF electric capacity; TW8817, video decoding chip.
At Figure 18, C4,0.1UF electric capacity; C1,0.1UF electric capacity; C3,10UF electric capacity; R2,75R resistance; C5,220UF/6.3V electric capacity; J1, video output interface BNC-5; SGM9111, the rail-to-rail composite video of 8MHz amplifies chip.
At Figure 19, C12,4.7UF electric capacity; C13,0.1UF electric capacity; C14,0.1UF electric capacity; C15,0.1UF electric capacity; C16,4.7UF electric capacity; C17,0.1UF electric capacity; C18,4.7UF electric capacity; C19,0.1UF electric capacity; C20,0.1UF electric capacity; C21,0.1UF electric capacity; C22,4.7UF electric capacity; C23,0.1UF electric capacity; C24,0.1UF electric capacity.
At Figure 20, R14,4.7R resistance; RN1, the 33R exclusion; RN2, the 33R exclusion; RN3, the 33R exclusion; RN4, the 33R exclusion; RN5, the 33R exclusion; RN6, the 33R exclusion; TM035,3.7 cun liquid crystal display screens.
At Figure 21, R20,10K resistance; R21,10K resistance; R23,10K resistance; R25,4.7R resistance; R26,1K resistance; C30,390PF electric capacity; C31,560PF electric capacity; SAA7121, video coding chip.
At Figure 22, CT5,0.47UF electric capacity; CT7,10UF electric capacity; CT8,0.1UF electric capacity; , C81,10UF electric capacity; C82,0.1UF electric capacity; CT28,0.1UF electric capacity; C113,220n electric capacity; C85,220n electric capacity; C89,300p electric capacity; C90,47n electric capacity; C91,1UF electric capacity; C95,1UF electric capacity; C94,0.47UF electric capacity; CT38,0.1UF electric capacity; C97,330n electric capacity; CT45,220n electric capacity; C99,470n electric capacity; C100,22n electric capacity; C102,220n electric capacity; RT9,0R resistance; R60,45.3K resistance; R61,150K resistance; R69,100R resistance; R116,20K resistance; R110,1K resistance; R112,200R resistance; R113,1K resistance; R114,11K resistance; R77,20M resistance; RT36,10K resistance; RT39,15K resistance; RT40,19K resistance; RT41,27K resistance; Rt42,56.9K resistance; R83,10K resistance; R89,1k resistance; Rt44,9.09K resistance; R177,0 resistance; Y3, the 4M crystal oscillator; DT6,1N4737 (7.5V) diode; T37, the BAT54S Schottky diode; U17, the ES51967 modulus conversion chip.
At Figure 23, CT4,0.1u electric capacity; CT5,0.47u electric capacity; C105,0.47n electric capacity; C110,10u electric capacity; C106,220n electric capacity; C112,0.1UF electric capacity; C93,0.1u electric capacity; RT18,47R resistance; RT19,39K resistance; RT20,10K resistance; RT22,1K resistance; R91,100K resistance; R95,100R resistance; T16, T17, BAT54A Schottky diode; U28, the PS2801-1 optocoupler; U24, the MIC2287YD5 power management chip; U30, transformer; DT21, the TL431 triode.
At Figure 24, CT4,0.1u electric capacity; C86,0.1u electric capacity; RT23,100K resistance; RT24RT25,10K resistance; RT27,470R resistance; R88R63R64R86,1K resistance; R102R85,4.7K resistance; T T26, the BAT54C Schottky diode; U19, U20, U22, U23, PS2801-1 optocoupler; U18, U21, HCF4094 communication control chip; P17, the external circuits interface.
At Figure 25, C96,300p electric capacity; R57,20K resistance; R66,100R resistance; R65,100K resistance; R68, PTC (SP MZ6) 1.5K thermistor; R78, R79,4.99M resistance; R104, R92RT11,100K resistance; RT10, the 100K exclusion; D19, D22, D30, D31,1N4735 (6V) diode; QT2, the NDS352P FET; QT3, Q10, QT12, QT13, Q16, Q17, Q18,2N7002 FET; DT1,1N4007, diode; K1, BP-5, relay; P15, P16, test pencil jack.
At Figure 26, CT29, C114,0.1u electric capacity; RT30,4.99K resistance; RT31,49.9K resistance; RT32,4.99M resistance; R97,499R resistance; R103,0 resistance; R58,0.5R resistance; R59,4.3R resistance; RT46,0.2R resistance; RT47,2R resistance; RT48,43R resistance; RS6, the 1K exclusion; D20, D21,1N4001 diode; Q8, Q9, NDS352P FET; Q10, the 2N7002 FET; DT1,1N4007, U25, HCF4051,8 tunnels analogy multiplexers; U27, HCF4052,4 tunnels analogy multiplexers; F1, fuse; D28, audio frequency white base.
Embodiment
In Fig. 1, to form by 10 big functional modules based on the full function intelligent video monitoring tester of PIC series monolithic, that is: the netting twine test module is realized break-make, line preface and the testing cassete numbering of test netting twine; It mainly is that the tester parameter is set that tester is provided with module, confirms the tester working method; Video is provided with module and realizes being provided with video parameter, and under the situation that external video input is arranged, detects the video formats and the vision signal intensity of external video; The cradle head control module mainly communicates through the RS485/RS422 port, controls the rotating manner of video equipments such as external The Cloud Terrace, ball machine; The Cloud Terrace address scan module mainly is to send a certain control command to judge and to confirm the address of The Cloud Terrace, ball machine through the RS485/RS422 port to The Cloud Terrace, ball machine; The data monitoring module receives and reads the PTZ control protocol of other testers through the RS485/RS422 port, with the correctness of the precious agreement of inspection Other Engineering; The coding chip module mainly is the colour bar vision signal that produces the various video standard, and exports these color bar signals to external video terminal or other video measurement appearance etc.; The decoding function that the decoding chip module has mainly realized receiving the video of extraneous input and exported self video information superposes after the external video information of decoding and with the OSD menu, finally exports liquid crystal display screen to and shows; LCDs has realized showing the external world and self video information, shows OSD menu and the function that the interface redirect is carried out in operation according to user key-press; Key-press module has mainly been realized subscriber switch machine and other keypress functions; Power management module has been realized the conversion of the different magnitudes of voltage under the dual power supply prerequisite and to the management of these magnitudes of voltage; The audio frequency control module has realized keypad tone is play and produced in the amplification of external audio signal; The PIC18 one-chip computer module is cooperated these 9 modules each other and is realized its function separately through the pin of self and the work of above 9 modules of build-in function module controls.
In Fig. 2,8 pins of single-chip microcomputer RG0～RG3 and RE0～RE3 are as the netting twine test port, are connected remaining 3 the pin ground connection of RJ45 with the netting twine interface via the exclusion of 2 47R.RE4～RE7 and RD0～RD3 realizes the 4*4 matrix press-key.VDDCORE, AVDD, VDD1, VDD2, VDD3 connect the 3.3V power supply; MCLR is used for system reset and DLL; LCD_PWR dares to driving the liquid crystal display screen logic level, and 485_CON is used to enable the RS485/RS422 serial communication modular, and D1 and D2 are used to indicate the indicator light of the transmitting-receiving of RS485/RS422 data; TFT_LED is used to enable to produce 18V liquid crystal display screen voltage backlight; LED_PWR is used to enable key-press backlight, and VDD_CON is used to drive 5V voltage and video amplifies chip, and CHA_ST is used to detect the state of lithium cell charging chip; 12_CON is used to enable 12V voltage; AUDIO_G and AUDIO_SHDN are used for control audio; AN0 is configured to ANALOG INPUT and detects battery dump energy; TX1 and RX1 are as RS485/RS422 serial interface inputoutput data; LCD_SPCK, LCD_SPDA, LCD_SPEN, LCd_RST are used to control 3.7 cun liquid crystal display screen work, and 8817_SCL, 8817_SDA, 8817_RST are used for communicating by letter with decoding chip TW8817, and 7121_RST, 7121_SCL, 7121_SDA are used for communicating by letter with coding chip SAA7121.MCLR, PGC, PGD constitute the online programming interface of chip, the 11.0592M crystal oscillator that single-chip microcomputer adopts external OSC1 and OSC2 to provide.
In Fig. 3, based on the intelligent video monitoring tester of PIC series monolithic 5V POWER and two kinds of supply power modes of 3.7V lithium battery BATTERY are arranged, BATTERY has 6 line box testers to connect 3 foundation lines, 3 power lines.
In Fig. 4, the VCCV low level drives MIC2196 work, produces 12V voltage after by after L1 and the MOS chip SI4884 processing, at last by Output power interface output 12V/1A supply voltage.
In Fig. 5, integrated chip MIC2287CBD5 is used to produce 5V voltage, after VDD drives MIC2287CBD5 work, produces 5V voltage and exports via SW.
In Fig. 6, the integrated chip ADP1613 that boosts is used to produce 18V LCD backlight voltage, and VDD and TFT_LCD low level drive integrated chip and start working, and pin SW produces and output 18V voltage.
In Fig. 7, integrated chip SGM2007-3.3 is used to produce 3.3V chip pin operating voltage, and VCC chip for driving SGM2007-3.3 starts working, and the voltage that produces behind the chip operation is via pin OUT output 3.3V voltage.
In Fig. 8, integrated chip SGM2007-1.8 is used to produce the work of 1.8V chip core, and VCC chip for driving SGM2007-1.8 starts working, and the voltage that produces behind the chip operation is via pin OUT output 1.8V voltage.
In Fig. 9, ICSP, i.e. online programming interface, by MCLR, PGD, PGC and grounding pin of single-chip microcomputer, a 3.3V voltage pin is formed, and this interface can be programmed to single-chip microcomputer with after programmable device is connected.
In Figure 10, integrated chip FDS6679AZ and FDG328P are mainly used in the functional module work that realizes through pin control peripheral chip.The 12_CON low level drives the FDS6679AZ chip and produces and export the VCCV signal, and the VDD_CON low level drives generation of FDG328P chip and output VDD signal, and the LED_PWR low level drives FDG328P generation and output LED_3V3 signal.
In Figure 11,4 LED of this figure are used to indicate the operating state of tester, and when tester connected the 5V external power supply, the VIN5V high level drove D15LED and lights; When tester connection 5V external power supply, battery is in charged state, and the BAT_STATE high level drives D16LED and lights, if battery is full of electricity, BAT_STATE low level indication D16LED extinguishes; When the RS485/RS422 of tester interface sent data, the D1 high level drove D17LED and lights; When the RS485/422 of tester interface received data, the D2 high level drove D18LED and lights.
In Figure 12; Integrated chip BQ2057C is used to manage the charging process of external power supply VIN5V to the 3.7V lithium battery; This chip passes through the dump energy that single-chip microcomputer pin AN0 detects battery, the charging process of the pin STAT reaction cell of BQ2057C, and STAT is a low level after battery is full of electricity; Otherwise if battery is for being full of electricity, then pin STAT is a high level.
In Figure 13,4*4 matrix keyboard RE4～RE7 and RD0～RD3 through single-chip microcomputer realize, RD0～RD3 is to draw on weak and input is put down through register configuration, and RE4～RE7 is set to output; RE4～RE7 exports a low level and three high level at every turn, and the input register that detects RD0～RD3 line by line is to confirm that button is pressed.Wherein, SW1 is the reset pin of tester, realizes resetting and waking tester up from resting state of tester, and SW4 is the power button of this instrument, is used to realize switching on and shutting down and makes instrument get into resting state.
In Figure 14, the LED light shown in this figure is the key-press backlight circuit diagram of 4*4 matrix keyboard, and according to after being used for operation and selecting to open key-press backlight, the output of LED_3.3V high level supplies 14 LED with electric weight D1～D14.
In Figure 15, single-chip microcomputer pin 485_CON high level makes chip MAX485 be in transmit status, and low level makes chip be in accepting state; The RO of this chip is connected with TX1 with the RX1 of single-chip microcomputer respectively with DI, carries out serial communication via the A of MAX485 and B and RS485 external-connected port;
In Figure 16, integrated chip SGM4890 is an audio-frequency power amplifier, is used to play external audio frequency information or produces keypad tone; After external audio frequency inserted tester through the mic interface, the AUDIO_SHDN low level drove SGM4890 and amplifies external audio frequency information, plays external audio frequency information via speaker; BUZZER, AUDIO_G, AUDIO_SHDN can produce keypad tone according to the work that cooperatively interacts of certain frequency, and keypad tone is also exported via speaker.
In Figure 17, the core operational voltage of video decoding chip TW8817 is 1.8V, and the pin operating voltage is 3.3V, and this chip is used for outside video information is handled, superposeed, and then exports the composite video signal after handling to liquid crystal display screen.This chip receives the control information from single-chip microcomputer via 8817_RST, 8817_SDA, 8817_SCL, and its crystal oscillator comes from external crystal oscillator 27MHz between XTI and the XTO, the also double external crystal-controlled oscillation of being SAA7121 of this external crystal oscillator.External video is via YIN1 or YIN0 input TW8817, then via YOUT output processed video information.TW8817 is showing to liquid crystal display screen through R0～R3, G0～G3, B0～B3 output OSD menu and relevant colouring information through the clock signal of FPCLK, FPVS, FPHS control liquid crystal display screen and the operating state of row field signal control liquid crystal display screen.
In Figure 18; J10 and J11 are respectively external video input interface and interior video output interface; Integrated chip SGM9111 is a video power amplification chip, and the video information of TW8817 output exports SGM9111 processed video power to via YOUT and is exaggerated, and the video accuracy that obtains is higher.
In Figure 19, the display circuit board of tester be divided into simulation ground with digitally, decoding chip TW8817, coding chip SAA7121, LCDs all need according to the chip handbook require the simulation of chip separately and digitally receive AGND and DGND.
In Figure 20; 3.7 the logic working voltage of very little liquid crystal display screen TM035 is 3.3V; The driving voltage of electric weight backlight is 18V; Chip receives the control information from single-chip microcomputer through LCD_RST, LCD_SPEN, LCD_SPCK, LCD_SPDA, receives the control information from TW8817 through FPCLK, FPVS, FPHS, then according to showing via the display message that R0～R3, G0～G3, B0～B3 send here from TW8817.
In Figure 21, coding chip SAA7121 operating voltage is 3.3V, and operating frequency is from the external crystal oscillator of the 27MHz of 7121_SCL; Coding chip receives the control information from single-chip microcomputer through 7121_RST, 7121_SCL, 7121_SDA; The colour bar vision signal that produces multiple standard is exporting decoding chip TW8817 to through pin CVBS, sends to liquid crystal display screen to color bar signal by TW8817 again and shows.
In Figure 22, ES51967 is a high-performance, and the modulus conversion chip of low-power consumption, band microprocessor can be realized high accuracy, full automatic digital versatile table function.Its operating voltage is 3V, adopts the 4M crystal oscillator to be external to the OSC1 and the OSC2 pin of chip, and OVH, OVX, VR1, VBAR, IVSH signal are all from the peripheral signal acquisition module.This chip carries out logic function control through I/O; Carry out pin coded with Single-chip Controlling FC1～FC4 and make up the selection that realizes measurement pattern; Through being set, REL, RANGE, SLACDC, HOLD wait the selection that realizes range and the switching of function simultaneously, and the output of measurement data.ES51967 can measure kind and comprise AC/DC voltage, AC/DC electric current, resistance, electric capacity, frequency, diode, break-make detection etc.Measurement result is handled to one-chip computer module from the serial transmission of SDO pin, and shows at LCD.Diode DT6 in the circuit is used to protect chip, prevents the impact of revers voltage
In Figure 23, supply with by the part working power of Single-chip Controlling universal instrument circuit, when gating function of multimeter not, this module can not given circuit supply, thereby reaches the requirement of the low-power consumption of system.The chip operating voltage of universal instrument part is selected for use is+4.3V and-3.3V, and the VCC-P17 voltage of single-chip microcomputer main is 5V.It is produced the square-wave voltage of 0V to 5V through connecting pwm modulator MIC2287; Be connected to transformer; Through the square-wave voltage of transformer voltage conversion generation ± 5V, utilize the clamping action of diode T16 and T17 again, produce the required operating voltage of universal instrument part respectively.
TL431 part mainly is in order to guarantee the stable output of operating voltage, TL431 to be connected into a voltage comparator, and its reference voltage is VT, when | V-|＞VT, and TL431 conducting, 2 pin output voltage VO=2V of TL431; When | V-|＜VT, TL431 ends, 2 pin output voltage VO=VCC of TL431.The TL431 dynamic output impedance is very little, and therefore, the input and output voltage waveform tracking effect of this circuit is fine.
The output voltage of TL431 part is received the feedback pin FB of MIC2287 through after the adjusting of photoelectrical coupler U28, thereby finally reaches the fail safe of VCC and stable output of V-and measurement.
P17 is the FPC socket, and wherein 1 pin connects the RA4 pin of single-chip microcomputer, is responsible for single-chip microcomputer and to ES51967 DATA is provided control signal; 2 pin connect single-chip microcomputer RC1 pin, to HCF4094 CLOCK are provided clock signal; 4 pin connect single-chip microcomputer RC0 pin, are responsible for receiving the serial data SDO that ES51967 sends; 5 pin connect the buzzer of mainboard module, output BUZOUT signal.After this four road signal has passed through the quarantine measures of photoelectrical coupler U20, U19, U23, U22 respectively, realize communicating by letter of single-chip microcomputer mainboard module and universal instrument ES51967 module, the gating of completion ES51967 functional module is guaranteed the accuracy and the fail safe of measuring.
In Figure 24; The series connection of two HCF4094 is used, and mainly is to be used for realizing the Single-chip Controlling signal with the serial input, converts the also line output that universal instrument ES51967 required mode is selected signal to; This type control signal comprises SLACDC, FC1～FC4, HOLD, REL, RANGE etc.
T26, RT23, RT24, RT25 and C86 form the IC protective circuit, and to HC4094 STROBE are provided signal.
In Figure 25, major function is the fail safe and the stability of system communication when guaranteeing systematic survey, utilizes the on-off action of metal-oxide-semiconductor, controls the gating of BP5 switch and the conducting of other module by signal.P16 is a universal instrument voltage resistance measuring junction, and P15 is the universal instrument COM port.
Wherein R68, R96, R78, R79, R57, R65, R104, R66, C96 etc. are common constitutes an attenuator circuit, the rectifier bridge common guarantee that collaborative D19, D22, D30, D31 form the fail safe of measuring circuit.
QT2 and QT3 are respectively the enhancement mode FETs of P raceway groove and N raceway groove, utilize the QT3 source electrode to meet V-, and grid connects the control signal of single-chip microcomputer; When its Vgs＞Vth (cut-in voltage), the QT3 conducting, the Single-chip Controlling signal is sent to the grid of QT2; When | Vgs|＞| Vth (cut-in voltage) | the time; QT2 conducting, thereby the adhesive of control BP5 switch, gate voltage resistance measurement function.
Q12, Q13, Q16, Q17, Q18 equally are the enhancement mode FETs of N raceway groove, and its source electrode all is connected with DGND, and the resistance through 100k Ω between drain electrode and the VCC is connected, to guarantee their operate as normal.Their turn-on condition is identical with QT3, mainly plays the effect of switch protection, guarantees the reliability of signal transmission.
In Figure 26, the current detection module formula is responsible for the sampling of universal instrument electric current and the gating of detecting pattern.P14 is the milliampere level current detecting port of universal instrument, and P13 is the big current detecting port of the 10A level of universal instrument.Q8 and Q9 are the enhancement mode FETs of P raceway groove; Its source electrode all is to be connected with a milliampere level current detecting port through the fuse that a specification is 250V1A; Grid interconnects with the control signal of single-chip microcomputer respectively, is used for guaranteeing the fail safe of measuring and the accuracy of testing result.
This module is the Electro Magnetic Compatibility that reaches higher, eliminates electromagnetic interference, guarantees the operate as normal of device, thereby improves measuring reliability, has increased like RT46, RT47, RT48 the coupling compatible circuit that R58, R59 and RS6 constituted.
HCF4051 is 8 tunnels analogy multiplexers; Be provided with through B, A, the C port of Single-chip Controlling HCF4051; Thereby gating different I/O port is connected with IVSH port (the big current detection signal input of ES51967), thereby realizes the selection of different electric flow measurement gear and scope.
Claims (6)
1. full function intelligent video monitoring tester based on the PIC series monolithic; Each outside Devices to test is connected with internal circuit board via tester interface; It is characterized in that: two kinds of supply power modes of 5V external power supply and 3.7V/2500mA lithium battery; Its 12V/1A out-put supply interface can supply video camera work through power line; Its RS485/422 interface can receive and show 485/422 facility information and control appliance motions such as The Cloud Terrace through data wire; Its video input/output interface and liquid crystal display screen can receive external video, the external video of output and the color bar signal that self produces, show external video and self color bar signal that its COBBAIF has been realized the reception external audio frequency and amplified and play and produce keypad tone that its netting twine test interface has been realized netting twine break-make and the test of line preface; The universal instrument test interface has been realized tests such as combined-voltage, ac and dc current, resistance, electric capacity, diode, break-make, and the light power meter test interface has been realized the accurate measurement of 850nm～1550nm wavelength.
2. the full function intelligent video monitoring tester based on the PIC series monolithic according to claim 1; It is characterized in that: single-chip microcomputer PIC18F67K22 is as its microprocessor; The work of all chips in the control system; Operating voltage is 3.3V, and the external crystal-controlled oscillation of employing is 11.0592MHz, realizes the ICSP programming through two pins; Single-chip microcomputer is through the operate as normal of a plurality of other integrated chips of single pin control; Single-chip microcomputer cooperates functions such as realizing RS485/RS422 serial communication, AD conversion, keypad tone and audio frequency amplification through internal module, a plurality of pin and other integrated chips.
3. the full function intelligent video monitoring tester based on the PIC series monolithic according to claim 1; It is characterized in that: dual power supply and abundant height voltage conversion function; Instrument is supported power supply of 5V external power supply and 3.7V/2500mA lithium battery power supply, converts 3.3V and 1.8V voltage into and supplies integrated chip pin and kernel work; The voltage that converts 12V/1A into is with the work of casual labour's external camera; Convert 18V voltage into and supply liquid crystal display screen work.
4. the full function intelligent video monitoring tester based on the PIC series monolithic according to claim 1 is characterized in that: the function of the also logical output of stable video I/O, video, generation colour bar vision signal, OSD menu; Instrument adopts video decoding chip TW8817 to realize the decoding processing to external video information, and after the character library information of stack ROM and RAM, generation meets vision signal and exports 3.7 cun liquid crystal display screen TM035CDH04 to and shows; Instrument adopts video coding chip SAA7121 to produce the color bar signal of various video standard, transfers to liquid crystal display screen via TW8817 and shows; Decoding chip and coding chip all adopt peripheral hardware crystal oscillator 27MHz as the oikocryst chip for driving work of shaking.
5. the full function intelligent video monitoring tester based on the PIC series monolithic according to claim 1; It is characterized in that: transformer conversion mainboard voltage is-3.3V and-4.5V universal instrument module work; 3 pins of main control chip PIC18 are through measurement pattern and the measuring range of string and conversion chip control ES51967, and the reader measurement result; Realize the interchange stream voltage measurement of the manual automatic range of 0-660V, the alterating and direct current flow measurement of 660uA～10A, the resistance measurement of 660ohm～66Mohm, capacitance measurement, the measurement of 0～2V forward voltage and the on off test etc. of 6.6nF～66000uF, also possessed functions such as locking demonstration, difference measurement.
6. the full function intelligent video monitoring tester based on the PIC series monolithic according to claim 1; It is characterized in that: after external light signal is handled via two demultiplexers; The size of current of varying strength light signal is different, can be through its luminous intensity size of current value size reaction of measuring light signal; The light signal input ES51967 that selects via multichannel output thereafter, can obtain the intensity size of light signal; This instrument has been realized the light signal strength value measurement of five kinds of wavelength such as 850nm, 1300nm, 1310nm, 1480nm, 1550nm, and sensitivity is 0.001nW.
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| CN104168477A (en) * | 2014-09-02 | 2014-11-26 | 深圳市兆驰股份有限公司 | Automatic TV decoding deck test system and method |
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| CN105652760A (en) * | 2016-03-08 | 2016-06-08 | 北京龙鼎源科技股份有限公司 | System and method for protecting power sources of single chip microcomputer |
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| CN111913095A (en) * | 2020-08-06 | 2020-11-10 | 易佰特新能源科技有限公司 | Method for detecting and maintaining faults of main board of automatic lithium battery formation equipment |
| CN111970505A (en) * | 2020-07-22 | 2020-11-20 | 国网河南省电力公司焦作供电公司 | Comprehensive tester for video monitoring system of transformer substation |
| CN113437889A (en) * | 2021-07-26 | 2021-09-24 | 沈阳工业大学 | Three-phase three-level high-power-factor rectifying device and method |
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- 2012-02-26 CN CN 201220075218 patent/CN202634617U/en not_active Expired - Lifetime
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| CN104168477A (en) * | 2014-09-02 | 2014-11-26 | 深圳市兆驰股份有限公司 | Automatic TV decoding deck test system and method |
| CN104539946A (en) * | 2015-02-05 | 2015-04-22 | 昆山软龙格自动化技术有限公司 | Four power supply independent image detection device |
| CN105652760A (en) * | 2016-03-08 | 2016-06-08 | 北京龙鼎源科技股份有限公司 | System and method for protecting power sources of single chip microcomputer |
| CN106375028A (en) * | 2016-08-31 | 2017-02-01 | 重庆宇通系统软件有限公司 | Wireless communication intrinsic safety signal processing instrument |
| CN106375028B (en) * | 2016-08-31 | 2020-04-07 | 重庆宇通系统软件有限公司 | Wireless communication intrinsic safety signal processing instrument |
| CN111970505A (en) * | 2020-07-22 | 2020-11-20 | 国网河南省电力公司焦作供电公司 | Comprehensive tester for video monitoring system of transformer substation |
| CN111913095A (en) * | 2020-08-06 | 2020-11-10 | 易佰特新能源科技有限公司 | Method for detecting and maintaining faults of main board of automatic lithium battery formation equipment |
| CN111913095B (en) * | 2020-08-06 | 2022-12-23 | 易佰特新能源科技有限公司 | Method for detecting and maintaining faults of main board of automatic lithium battery formation equipment |
| CN113437889A (en) * | 2021-07-26 | 2021-09-24 | 沈阳工业大学 | Three-phase three-level high-power-factor rectifying device and method |
| CN113791440A (en) * | 2021-08-25 | 2021-12-14 | 昆明理工大学 | Radiation monitoring equipment based on CPS |
| CN113791440B (en) * | 2021-08-25 | 2024-05-17 | 昆明理工大学 | CPS-based radiation monitoring equipment |
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Legal Events
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| C14 | Grant of patent or utility model | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20170703 Address after: 201317, Shanghai, Pudong New Area, Shanghai South Road, No. 1, 4888, 2, C District Patentee after: SHANGHAI FOCUS VISION SECURITY TECHNOLOGY CO., LTD. Address before: 201317 Shanghai city Pudong New Area South Road No. 4888 Patentee before: SHANGHAI AIPU WATON ELECTRONIC INDUSTRIES CO., LTD. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121226 |