CN102319054A - Portable vision tester - Google Patents
Portable vision tester Download PDFInfo
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- CN102319054A CN102319054A CN201110144108A CN201110144108A CN102319054A CN 102319054 A CN102319054 A CN 102319054A CN 201110144108 A CN201110144108 A CN 201110144108A CN 201110144108 A CN201110144108 A CN 201110144108A CN 102319054 A CN102319054 A CN 102319054A
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Abstract
The invention discloses a portable vision tester, which consists of a small-sized singlechip control circuit and a detection assisting component, wherein the small-sized singlechip control circuit is used for controlling and displaying a sighting target; the detection assisting component is used for fixing and supporting parts such as a main control board, a liquid crystal display screen and the like in the small-sized singlechip control circuit; the small-sized singlechip control circuit is arranged in front and back shells in the detection assisting component, and consists of a main control board, a liquid crystal display screen and a sighting target controller circuit; and the detection assisting component comprises an observation mirror (1), a front shell (2), a detection pen (3), a sighting target controller (4), a liquid crystal screen installation piece (5), a main control board installation piece (7), a back shell (8), an interface (9) of the sighting target controller, an interface (10) of the singlechip control circuit on the sighting target controller, and a signal wire (11) for connecting the sighting target controller with the small-sized singlechip control circuit. The portable vision tester has light weight and a small size, and can be applied to vision examination of various levels.
Description
(1) technical field
The present invention relates to a kind of portable visual acuity detector, belong to detecting instrument and equipment technical field.
(2) background technology
The a lot of eyesight detecting instrument bodies that use at present amass greatly, carry inconvenience, and need external 220v power supply, so the place to use is limited; In testing process, also need simultaneously the artificial indication of user sighting target, easy fatigue works long hours.The present invention is intended to respect under the prerequisite of tester's custom, employs new technology traditional eyesight detecting instrument is improved.
(3) summary of the invention
1, purpose: the purpose of this invention is to provide a kind of portable visual acuity detector, it has overcome the deficiency of prior art, is a kind of novel structure, easy to operate, dapper portable visual acuity detector.
2, technical scheme: a kind of portable visual acuity detector of the present invention, it comprises small-sized single chip machine controlling circuit and detection accessory two parts.Its relation between the two is: small-sized single chip machine controlling circuit is responsible for control and is shown sighting target; Fixing and the support of parts such as the master control borad in the responsible small-sized single chip machine controlling circuit of detection accessory, LCDs, sighting target controller, small-sized single chip machine controlling circuit is installed in the front and back housing that detects in the accessory.
Said small-sized single chip machine controlling circuit is made up of master control borad, LCDs, sighting target controller circuitry.Its signal trend is: the single-chip microcomputer on the master control borad; Obtain the sighting target controller information that detects in the accessory through inquiry I/O mouth; The control information of reading according to the I/O mouth then, the information such as reset of making on LCDs that corresponding demonstration or response detect that sighting target controller in the accessory transmits.
This master control borad is mainly by 5V power supply, single-chip microcomputer; Reset circuit, clock-pulse circuit are formed; Position annexation between them is: the power pins of single-chip microcomputer connects the 5V battery powered; The reset pin of single-chip microcomputer is connected with the holding wire that the reset key of sighting target controller in detecting accessory is drawn; When the reset key of this sighting target controller is pressed;
pin that gives single-chip microcomputer surpasses the low level of 1.5us, and single-chip microcomputer produces homing action; The XTAL1 of single-chip microcomputer is connected the quartz oscillation crystal with the XTAL2 pin and promptly constitutes clock-pulse circuit.Wherein the single-chip microcomputer model is: Atmega8, the DIP encapsulation has 28 pins.This reset circuit is made up of 5V power supply, capacitor C, resistance R, reset key j10; Position annexation between them is: reset key j10 is parallelly connected with capacitor C; Connect with resistance R again; Supply power by the 5V power supply; Lead-out wire is connected with single-chip microcomputer
pin, as shown in Figure 6; This clock-pulse circuit is made up of commercial quartz oscillation crystal J, capacitor C 1, C2, the end of capacitor C 1, the C2 back ground connection that links together, the other end respectively with the XTAL1 and the XTAL2 pin that are connected to single-chip microcomputer after the two ends of quartz oscillation crystal J are connected.As shown in Figure 7.
This LCDs is Samsung's product, its direct integrated LCD drive controlling chip, and screen size can guarantee to show all size sighting targets; Its screen intensity scope 80-320cd/m2 meets vision and detects prescribed limit; The screen supply voltage is low, adopts 5 volts of battery powered.
This sighting target controller circuitry is made up of power supply and key switch; Their output lead 1-5 is connected with PC0-PC3,
pin of single-chip microcomputer, sees shown in Figure 6.This power supply promptly is the 5V of a system power supply, is placed in the front and back housing that detects in the accessory; This key switch is respectively from j10 to j14 and resets, maximum sighting target, a last sighting target, next sighting target, switches sighting target (changing opening direction under the same sighting target size) five; They are installed on the sighting target controller that detects in the accessory, are the commercial products of selecting for use on request.
Said detection accessory, mainly comprise sight glass 1, procapsid 2, detecting pen 3, sighting target controller 4, liquid crystal display screen installed part 5, master control borad installed part 7, back casing 8, with the interface 9 of sighting target controller, sighting target controller on the interface 10 of single chip machine controlling circuit and sighting target controller and small-sized single chip machine controlling circuit between the holding wire 11 that is connected.Position annexation between them is: sight glass 1 is hinged with procapsid 2, can open and close; Detecting pen 3 is placed in the groove of procapsid 2, takes out usefulness during detection; Sighting target controller 4 is also placed in the groove of procapsid 2; Take out during detection; With being inserted on the back casing 8 and the interface 9 sighting target controller with the interface 10 of single chip machine controlling circuit on the sighting target controller, the sighting target controller has just been set up signal through holding wire 11 with small-sized single chip machine controlling circuit and has been connected like this; Liquid crystal display screen installed part 5 is installed in the cavity of procapsid 2 and back casing 8 with master control borad installed part 7, connects into an integral body through bolt between the two, and the LCDs in the small-sized single chip machine controlling circuit 6 is embedded in the space between the two; Master control borad 14 in the small-sized single chip machine controlling circuit is installed in the master control borad installed part 7.
This sight glass 1 is the common plane mirror, and the reflection through light can be so that be sitting in the gesture that lateral tester sees detected person in the mirror, and it is hinged on the procapsid 2;
This forward and backward housing the 2, the 8th, plastics boxlike part holds and parts such as installation and measuring pen 3, sighting target controller 4, liquid crystal display screen installed part 5, master control borad installed part 7;
This detecting pen 3 is pen type structures, and it is self-control;
This sighting target controller 4 is by forming with the interface 10 and the holding wire 11 of single chip machine controlling circuit on sighting target controller housing 12, button 13, the sighting target controller; Relation is that this button 13 is installed in the housing right front ends therebetween; Interface 10 and holding wire 11 with single chip machine controlling circuit on this sighting target controller pass the housing top; Outside being arranged on, profile is as shown in Figure 3, and the inner core of the holding wire 11 that is connected with button 13 has five; The relation of inner core 1-5 is as shown in Figure 6, and the inner core 1-5 of holding wire 11 is packaged together becomes the interface of single chip machine controlling circuit 10.This sighting target controller housing 12 is out foraminous cuboid engineering plastics shell; This button 13 is two small cylindrical and 3 little cuboids; When pushing button; The input of corresponding I/O mouth becomes low level from the high level saltus step, and small-sized single chip machine controlling circuit reads control information from the input port, according to control information the demonstration of LCDs is controlled; This holding wire 11 is a common wiring.In the user hands, it was placed in the groove of procapsid 2 in the time of no when this sighting target controller 4 used, and sight glass 1 is rotating closed, and it is as a whole that whole instrument becomes, and is convenient for carrying.
This liquid crystal display screen installed part 5 has the cuboid spare of rectangular opening in the middle of being, it is a plastic plate, and when it and master control borad installed part 7 link together through bolt, thereby LCDs is clipped between the two;
This master control borad installed part 7 is cuboid spares; It also is the important component part that LCDs is installed; It is constructed as shown in Figure 5, and it is made up of with the back casing 72 of master control borad installed part the procapsid 71 of master control borad installed part, and LCDs 6 is placed in the deep gouge of this procapsid 2.Back casing 72 shapes of master control borad installed part as shown in Figure 5; There are four convexities can block master control borad 14; Forward and backward housing 71, the 72 usefulness bolts of master control borad installed part link together; Master control borad 14 just is fixed in the cavity in the forward and backward housing 71,72 of its master control borad installed part, it can be directly and LCDs 6 through SPI slot line, the square hole of line from the back casing 72 of master control borad installed part of itself and sighting target controller 4 stretches out; Be connected to interface 9 places with the sighting target controller; With interface 9 places of sighting target controller is the socket that is connected of 5 lines, should with the position of the interface 9 of sighting target controller in the lower right side of back casing 8, it is the connection socket of five lines;
On this sighting target controller with the interface 10 of single chip machine controlling circuit be five interfaces that line is packaged together, it be connected with the interface 9 usefulness holding wires 11 of sighting target controller.
Wherein, this LCDs is 1.8 " TFT-LCD, its model is: LTV180WQ-F02, its overall dimensions are 42.75mm * 37.16mm * 2.86mm;
Wherein, the overall dimensions of this forward and backward housing is 120mm (length) * 60mm (wide) * 150mm (height);
Wherein, the overall dimensions of this detecting pen is φ 10 * 150mm;
Wherein, the overall dimensions of this liquid crystal display screen installed part 5 is: 75mm (length) * 45mm (wide), and thickness is 3mm, and interstitial hole is of a size of 40mm (length) * 35mm (wide), and four jiaos have four through holes;
Wherein, the overall dimensions of the procapsid 71 of this master control borad installed part is 75mm (length) * 45mm (wide) * 15mm (height), and the thickness of shell is 5mm; Have the hole of 40mm (length) * 35mm (wide) in the middle of this procapsid; Bore edges has deep gouge, is of a size of 42.8mm (length) * 37.2mm (wide), dark 3mm.The overall dimensions of the back casing 72 of master control borad installed part is 75mm (length) * 45mm (wide) * 3mm (thick).
Workflow of the present invention is following:
During use, set this eyesight detecting instrument, guarantee that the height of instrument position is consistent with measured's eye-level,, make it measured's gesture to be reflexed in tester's eye the sight glass Unscrew.User is held the sighting target controller, opens instrument power source, shows maximum sighting target through the sighting target controller then; If detected person's measurement is passed through, can show next sighting target by switching push button, uncertain if the measured judges on the sighting target of a size, then show another onesize sighting target, but opening direction changes through switching the sighting target button.Behind the one bit test person EOT, can press maximum sighting target button, show maximum sighting target again, proceed test.Judge that the detected person whether during astigmatism, can use test bar to carry out according to standard detecting method.
3, the invention has the beneficial effects as follows:
A kind of light little easy eyesight detecting instrument device is provided, its light weight, volume is little, is easy to carry and manipulates, and on the basis of respecting tester's custom, original portable type eyesight detecting instrument device is improved.This instrument still adopts the design standard of standard visual acuity chart, and sighting target size and direction are selected automatically by small-sized single-chip microcomputer and shown by liquid crystal display screen.Liquid crystal display screen satisfies the vision examination criteria aspect light intensity, can be used to survey the vision number, and the astigmatic detecting pen that instrument carries can be used for judging astigmatism.
(4) description of drawings
Fig. 1 is a schematic perspective view of the present invention;
Fig. 2 is an organigram of the present invention;
Fig. 3 is the sketch map of sighting target controller;
Fig. 4 is the enlarged drawing of sighting target controller and master control borad wiring;
Fig. 5 is LCD and master control borad scheme of installation;
Fig. 6 is the schematic diagram of sighting target controller circuitry;
Fig. 7 is the clock-pulse circuit figure of single-chip microcomputer.
Symbol description is following among the figure:
The 1-sight glass; The 2-procapsid; The 3-detecting pen; 4-sighting target controller; 5-liquid crystal display screen installed part; The 6-LCDs; 7-master control borad installed part; The 8-back casing; The interface of 9-and sighting target controller; On the 10-sighting target controller with the interface of single chip machine controlling circuit; The 11-holding wire; 12-sighting target controller housing; The 13-button; The 14-master control borad; The procapsid of 71-master control borad installed part; The back casing of 72-master control borad installed part; The VC-5V power supply; GND-ground connection; R-resistance; The j10-j14-button; C, C1, C2-electric capacity; J-quartz oscillation crystal.
(5) specific embodiment
See Fig. 1, Fig. 2, a kind of portable visual acuity detector of the present invention, it comprises small-sized single chip machine controlling circuit and accessory two parts.Its relation between the two is: small-sized single chip machine controlling circuit is responsible for control and is shown sighting target; Fixing and the support of parts such as the master control borad in the responsible small-sized single chip machine controlling circuit of detection accessory, LCDs 6, sighting target controller 4, small-sized single chip machine controlling circuit is installed in the forward and backward housing 2,8 that detects in the accessory.
Said small-sized single chip machine controlling circuit is made up of master control borad 14, LCDs 6 and sighting target controller circuitry.Signal trend is: the single-chip microcomputer on the master control borad 14 obtains sighting target controller 4 information through inquiry I/O mouth, reads control information according to the I/O mouth then, the information such as reset of on LCDs 6, making corresponding demonstration or responding that sighting target controller 4 transmits.
This master control borad 14 is mainly by 5V power supply, single-chip microcomputer, and reset circuit, clock-pulse circuit are formed.Wherein the single-chip microcomputer model is: Atmega8, the DIP encapsulation has 28 pins.Position annexation between them is: the power pins of single-chip microcomputer connects the 5V battery powered; The reset pin of single-chip microcomputer is connected with the holding wire 11 that sighting target controller reset key is drawn; When the reset key of sighting target controller 4 is pressed; Give the low level that single-chip microcomputer
pin surpasses 1.5us, single-chip microcomputer produces homing action; The XTAL1 of single-chip microcomputer is connected the quartz oscillation crystal with the XTAL2 pin can constitute clock-pulse circuit.This reset circuit is made up of 5V power supply, capacitor C, resistance R, reset key j10; Position annexation between them is: as shown in Figure 6; Reset key j10 is parallelly connected with capacitor C; Connect with resistance R again; By the power supply of 5V power supply, lead-out wire is connected with single-chip microcomputer
pin; This clock-pulse circuit is made up of quartz oscillation crystal J, capacitor C 1, C2; Annexation is between them: the end of capacitor C 1, the C2 back ground connection that links together, the other end respectively with the XTAL1 and the XTAL2 pin that are connected to single-chip microcomputer after the two ends of quartz oscillation crystal J are connected.Concrete structure such as Fig. 7.
This LCDs 6 is: Samsung 1.8, and " (TFT-LCD of 42.75mm * 37.16mm * 2.86mm), model is: LTV180WQ-F02, direct integrated liquid crystal display screen drive controlling chip TL1851; SPI encapsulation; 26 pins are externally arranged, and 8 position datawires can directly link to each other with the single-chip processor i/o pin.Screen intensity is 300cd/m2, meets the prescribed limit 80-320cd/m2 of vision sensed luminance, and the screen supply voltage is low, adopts 5 volts of battery powered.
Control circuit in the sighting target controller 4 needs oneself to make, and control circuit mainly is made up of power supply, key switch, sees Fig. 6 with being connected of single-chip microcomputer.See Fig. 3; Button 13 is total to be resetted, maximum sighting target, a last sighting target, next sighting target, switching sighting target (changing opening direction under the same sighting target size) five; Each button 13 is switches, is connected with the I/O mouth of single-chip microcomputer separately, is followed successively by the inner core 1-5 of the holding wire 11 of sighting target controller 4.Each button 13 is a low level by the signal of next its input, otherwise is high level.On the sighting target controller with single chip machine controlling circuit socket 10 be inserted on the back casing 8 and the interface 9 sighting target controller after, the inner core 1-5 of holding wire 11 connects PC0-PC3,
pin of single-chip microcomputer respectively.After arbitrary button 13 was pressed, single-chip microcomputer all can read the low level signal of I/O mouth, makes control corresponding according to this signal like this.Five buttons 13 are arranged above the sighting target controller 4; The holding wire 11 of drawing is arranged at the top; Totally five of the inner cores of holding wire 11; Concentrate in together, make a socket (be on the sighting target controller with the socket 10 of single chip machine controlling circuit), sighting target controller 4 overall dimensions are 80mm (length) * 50mm (wide) * 35mm (thick).
Said Instrument shell material is plastics, and thickness is 3mm, and procapsid 2 shapes as shown in Figure 2; Windowing in the centre, is of a size of 40mm (length) * 35mm (wide), and the lower part is fluted; Size is close with sighting target controller 4, is used to place sighting target controller 4, near the zone in the outside groove is arranged also; Be used for putting detecting pen 3, it is of a size of φ 10mm * 150mm.
Said liquid crystal display screen installed part 5 shapes as shown in Figure 2; Be a plastic plate, be of a size of 75mm (length) * 45mm (wide), thickness is 3mm; Interstitial hole size 40mm (length) * 35mm (wide); Four jiaos have four through holes, and when it and master control borad installed part 7 link together through bolt, thereby LCDs 6 is clipped between the two.
Said master control borad installed part 7 also is simultaneously the important component part that liquid crystal display screen is installed, and it is constructed as shown in Figure 5, is made up of the procapsid 71 and the back casing 72 of master control borad installed part of master control borad installed part; The procapsid 71 of this master control borad installed part is of a size of 75mm (length) * 45mm (wide) * 15mm (height); The thickness of shell is 5mm, has size in the middle of this procapsid 71 and is the hole of 40mm (length) * 35mm (wide), and bore edges has deep gouge; Be of a size of 42.8mm (length) * 37.2mm (wide), dark 3mm.The back casing 72 of this master control borad installed part is of a size of 75mm (length) * 45mm (wide) * 3mm (thick), and liquid crystal display screen 6 just in time is placed on wherein.Back casing 72 shapes of master control borad installed part as shown in Figure 5; There are four convexities can block master control borad 14; Forward and backward housing 71, the 72 usefulness bolts of master control borad installed part link together then; Master control borad 14 just is fixed in the cavity in the forward and backward housing 71,72 of its master control borad installed part, it can be directly and liquid crystal display screen through SPI slot line, the square hole of line from the back casing 72 of master control borad installed part of itself and sighting target controller 4 stretches out; Being connected to interface 9 places with the sighting target controller, is the socket that is connected of five lines with interface 9 places of sighting target controller.
Said back casing 8 shapes as shown in Figure 2; Thickness of shell is 3mm; There are four convexities the mesozone in the shell, and dark 10mm has screw thread in the convexity; Four holes that protruding distributed dimension and liquid crystal display screen installed part 5, master control borad installed part are 7 four jiaos are consistent, and they are installed on the back casing 8 through bolt together during installation.Back casing 8 side opening square holes are equipped with the interface 9 with the sighting target controller.
After the forward and backward housing 2,8 of said instrument was installed together, the volume of whole instrument was: 120mm (length) * 60mm (wide) * 150mm (height).
During concrete the use, set instrument, guarantee that the height of instrument position is consistent with measured's eye-level,, make it measured's gesture to be reflexed in tester's eye the mirror Unscrew.User is held sighting target controller 4, opens instrument power source, and the control through sighting target controller 4 shows maximum sighting target then; If detected person's measurement is passed through, can show next sighting target by button 13, uncertain if the measured judges on the sighting target of a size, then show another onesize sighting target, but opening direction changes through switching key 13.Behind the one bit test person EOT, can press the button 13 of maximum sighting target, show maximum sighting target again, proceed test.Judge that the detected person whether during astigmatism, can use detecting pen according to standard detecting method.
Claims (7)
1. portable visual acuity detector; It is characterized in that: it comprises small-sized single chip machine controlling circuit and detection accessory two parts; Small-sized single chip machine controlling circuit is responsible for control and is shown sighting target; Fixing and the support of the master control borad in the responsible small-sized single chip machine controlling circuit of detection accessory, LCDs, sighting target controller, small-sized single chip machine controlling circuit is installed in the front and back housing that detects in the accessory;
Said small-sized single chip machine controlling circuit is made up of master control borad, LCDs, sighting target controller circuitry; Its signal trend is: the single-chip microcomputer on the master control borad; Obtain the sighting target controller information that detects in the accessory through inquiry I/O mouth; Corresponding demonstration is made in the control information of reading according to the I/O mouth then on LCDs or response detects the repositioning information that the sighting target controller in the accessory transmits; This master control borad is by 5V power supply, single-chip microcomputer; Reset circuit, clock-pulse circuit are formed; The power pins of single-chip microcomputer connects the 5V battery powered; The reset pin of single-chip microcomputer is connected with the holding wire that the reset key of sighting target controller in detecting accessory is drawn; Press when the reset key of this sighting target controller,
pin that gives single-chip microcomputer surpasses the low level of 1.5us, and single-chip microcomputer produces homing action; The XTAL1 of single-chip microcomputer is connected the quartz oscillation crystal with the XTAL2 pin and promptly constitutes clock-pulse circuit; This single-chip microcomputer has 28 pins, the DIP encapsulation; This reset circuit is made up of 5V power supply, capacitor C, resistance R, reset key j10; Reset key j10 is parallelly connected with capacitor C; Connect with resistance R again; By the power supply of 5V power supply, lead-out wire is connected with single-chip microcomputer
pin; This clock-pulse circuit is made up of commercial quartz oscillation crystal J, capacitor C 1, C2, the end of capacitor C 1, the C2 back ground connection that links together, the other end respectively with the XTAL1 and the XTAL2 pin that are connected to single-chip microcomputer after the two ends of quartz oscillation crystal J are connected; The direct integrated LCD drive controlling of this LCDs chip, screen size can guarantee to show all size sighting targets; Its screen intensity scope 80-320cd/m2 meets vision and detects prescribed limit; Screen adopts 5 volts of battery powered; This sighting target controller circuitry is made up of power supply and key switch, and their output lead (1-5) is connected with PC0-PC3,
pin of single-chip microcomputer; This power supply promptly is a detector 5V power supply, is placed in the front and back housing that detects in the accessory; This key switch is respectively from j10 to j14 and resets, maximum sighting target, a last sighting target, next sighting target, switches five of sighting targets, and they are installed on the sighting target controller that detects in the accessory;
Said detection accessory, comprise sight glass (1), procapsid (2), detecting pen (3), sighting target controller (4), liquid crystal display screen installed part (5), master control borad installed part (7), back casing (8), with the interface (9) of sighting target controller, sighting target controller on the interface (10) of single chip machine controlling circuit and sighting target controller and small-sized single chip machine controlling circuit between the holding wire (11) that is connected; Sight glass (1) is hinged with procapsid (2), can open and close; Detecting pen (3) is placed in the groove of procapsid (2), takes out usefulness during detection; Sighting target controller (4) is also placed in the groove of procapsid (2); Take out during detection; With being inserted on the back casing (8) and the interface sighting target controller (9) with the interface (10) of single chip machine controlling circuit on the sighting target controller, the sighting target controller has just been set up signal through holding wire (11) with small-sized single chip machine controlling circuit and has been connected like this; Liquid crystal display screen installed part (5) and master control borad installed part (7) are installed in the cavity of procapsid (2) and back casing (8), connect into an integral body through bolt between the two, and the LCDs in the small-sized single chip machine controlling circuit is embedded in the space between the two; Master control borad in the small-sized single chip machine controlling circuit (14) is installed in the master control borad installed part (7); This sight glass (1) is the common plane mirror, and the reflection through light can be so that be sitting in the gesture that lateral tester sees detected person in the mirror, and it is hinged on the procapsid (2); This forward and backward housing (2), (8) are plastics boxlike parts; Hold and installation and measuring pen (3), sighting target controller (4), liquid crystal display screen installed part (5), master control borad installed part (7) parts; This detecting pen (3) is a self-control pen type structure, and this sighting target controller (4) is by forming with the interface (10) and the holding wire (11) of single chip machine controlling circuit on housing, button (13), the sighting target controller; This button (13) is installed in the housing right front ends; Interface (10) and holding wire (11) with single chip machine controlling circuit on this sighting target controller pass the housing top; Outside being arranged on; The inner core of the holding wire (11) that is connected with button 13 has five, and this inner core 1-5 is packaged together becomes the interface of single chip machine controlling circuit (10); This housing is out foraminous cuboid engineering plastics shell; This button is a small cylindrical, and when pushing button (13), the input of corresponding I/O mouth becomes low level from the high level saltus step, and small-sized single chip machine controlling circuit reads control information from the input port, according to control information the demonstration of LCDs (6) is controlled; This holding wire (11) is a common wiring; In the user hands, it was placed in the groove of fore shell in the time of no when this sighting target controller (4) used, and sight glass is rotating closed, and it is as a whole that whole instrument becomes; This liquid crystal display screen installed part (5) has the cuboid spare of rectangular opening in the middle of being, it is a plastic plate, and with master control borad installed part (7) when linking together through bolt, thereby LCDs (6) is clipped between the two; This master control borad installed part (7) is a cuboid spare, is made up of the procapsid (71) and the back casing (72) of master control borad installed part of master control borad installed part, and LCDs (6) is placed in the deep gouge of this procapsid (71); The back casing of master control borad installed part (72) shape has four convexities; Can block master control borad (14); The forward and backward housing (71) of master control borad installed part, (72) link together with bolt; Master control borad (14) just is fixed in the forward and backward housing (71), the cavity in (72) of its master control borad installed part, and it directly passes through SPI slot line with liquid crystal display screen, and the square hole of line from the back casing (72) of master control borad installed part of itself and sighting target controller (4) stretches out; Be connected to the interface (9) of sighting target controller and locate; Locating with the interface (9) of sighting target controller is the socket that is connected of five lines, should with the position of the interface (9) of sighting target controller in the lower right side of back casing (8), it is the connection socket of five lines; On this sighting target controller with the interface (10) of single chip machine controlling circuit be five interfaces that line is packaged together, it be connected with holding wire (11) with the interface (9) of sighting target controller.
2. a kind of portable visual acuity detector according to claim 1 is characterized in that: this LCDs (6) is 1.8, and " TFT-LCD, its overall dimensions are 42.75mm * 37.16mm * 2.86mm.
3. a kind of portable visual acuity detector according to claim 1 is characterized in that: this single-chip microcomputer model is: Atmega8.
4. a kind of portable visual acuity detector according to claim 1 is characterized in that: the overall dimensions of this forward and backward housing (2), (8) is long 120mm * wide 60mm * high 150mm.
5. a kind of portable visual acuity detector according to claim 1 is characterized in that: the overall dimensions of this detecting pen (3) is φ 10 * 150mm.
6. a kind of portable visual acuity detector according to claim 1 is characterized in that: the overall dimensions of this liquid crystal display screen installed part (5) is: long 75mm * wide 45mm, thickness are 3mm, and interstitial hole is of a size of long 40mm * wide 35mm, and four jiaos have four through holes.
7. a kind of portable visual acuity detector according to claim 1; It is characterized in that: the overall dimensions of the procapsid of this master control borad installed part (71) is long 75mm * wide 45mm * high 15mm, and thickness is 5mm, has the hole of long 40mm * wide 35mm in the middle of the procapsid of this master control borad installed part (71); Bore edges has deep gouge; Be of a size of long 42.8mm * wide 37.2mm, dark 3mm, the back casing of this master control borad installed part (72) overall dimensions is long 75mm * wide 45mm * thick 3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110144108 CN102319054B (en) | 2011-05-31 | 2011-05-31 | Portable vision tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110144108 CN102319054B (en) | 2011-05-31 | 2011-05-31 | Portable vision tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102319054A true CN102319054A (en) | 2012-01-18 |
| CN102319054B CN102319054B (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110144108 Expired - Fee Related CN102319054B (en) | 2011-05-31 | 2011-05-31 | Portable vision tester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109758110A (en) * | 2019-03-27 | 2019-05-17 | 柳州市柳铁中心医院 | Visual chart is examined outside one kind is portable |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2255817Y (en) * | 1996-05-14 | 1997-06-11 | 张继开 | Electronic testing instrument for visual acuity |
| US7458686B2 (en) * | 2004-05-31 | 2008-12-02 | Kabushiki Kaisha Topcon | Optometry apparatus |
| CN101380224A (en) * | 2007-09-04 | 2009-03-11 | 株式会社拓普康 | Eye detection device |
| CN201612595U (en) * | 2010-01-29 | 2010-10-27 | 黄安庆 | Multifunction conversion-type eyesight checker |
-
2011
- 2011-05-31 CN CN 201110144108 patent/CN102319054B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2255817Y (en) * | 1996-05-14 | 1997-06-11 | 张继开 | Electronic testing instrument for visual acuity |
| US7458686B2 (en) * | 2004-05-31 | 2008-12-02 | Kabushiki Kaisha Topcon | Optometry apparatus |
| CN101380224A (en) * | 2007-09-04 | 2009-03-11 | 株式会社拓普康 | Eye detection device |
| CN201612595U (en) * | 2010-01-29 | 2010-10-27 | 黄安庆 | Multifunction conversion-type eyesight checker |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109758110A (en) * | 2019-03-27 | 2019-05-17 | 柳州市柳铁中心医院 | Visual chart is examined outside one kind is portable |
| CN109758110B (en) * | 2019-03-27 | 2024-05-28 | 柳州市柳铁中心医院 | Portable external examination visual acuity chart |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102319054B (en) | 2013-08-07 |
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