TW200848917A - Speed-measuring camera capable of automatically switching shutter mode according to ambient brightness change - Google Patents

Abstract

The present invention discloses a speed-measuring camera capable of automatically switching shutter mode according to ambient brightness change. The present invention comprises a sensing unit, an automatic switch module and a camera which are sequentially connected. According to exterior brightness received by the sensing unit, and settings of a fixed shutter setup circuit preinstalled in the automatic switch module, the automatic switch module can control shutter mode of the camera. Therefore, as the exterior brightness changes, the shutter mode of the camera would accordingly changes, thereby achieving the effect of automatically switching the shutter mode.

Description

200848917 IX. Description of the Invention: [Technical Field] The present invention relates to a speed camera, and more particularly to a speed camera that can automatically switch the shutter mode by (4) environmental responsibility change. L no W technology] The existing speed camera is placed in an outdoor environment, and the brightness change of the outdoor environment is (4) time or climate change changes greatly, such as the change of the sunny and cloudy redundancy' or as the day and night The brightness changes. The shutter mode of the speed camera is divided into an automatic shutter and a fixed shutter. When using the speed camera, (4) operating in one of the modes. However, 'different shutter modes are suitable for different brightness conditions. The following describes different shutter modes and various conditions under ambient brightness: In the Shih-Shan mode, and for daytime or brightness is enough, if the speed is too fast, it will lead to The license plate of the car cannot be recognized. For example, if the shutter is set to 1/250 day, only the vehicle license plate with a speed of 50 kiD/hr or less can be discriminated. 2. Fixed shutter mode, but for night or when the brightness is insufficient. 'Although the problem of the vehicle license plate that cannot recognize the speed is still there, the fixed shutter can prevent the camera from being shot at night or when the brightness is insufficient. The car lights and shadows drag and drop. 3. In the auto shutter mode, when the daytime or brightness is sufficient, the license plate of the high-speed vehicle can be discriminated. 5 200848917 Ugly is the night or the brightness is insufficient. The shutter is in the shutter mode, and it is impossible to discriminate the handle plate with too fast speed. However, the vehicle with slower speed will also cause the car light and shadow to appear due to the photograph taken: Identify the license plate. SUMMARY OF THE INVENTION In order to solve the problem that the existing speed camera can only be set as a fixed shutter or an automatic shutter/door, it is only suitable for one xj, m kindness.

The invention is a kind of automatic switching shutter speed measuring camera which can be changed according to the 古 撼 古 古 古 古 古 古 i i i i i , , , , , , 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动The automatic switching module has a wheel-in terminal connected to the sensing unit, and includes: - a fixed shutter setting circuit that accepts a user's setting to form a corresponding setting signal; and ", - - judges the circuit" The output end of the sensing unit is connected and receives the wheel of the sensing unit to generate a corresponding ambient brightness level signal; and a control circuit 'the two input terminals are respectively associated with the fixed shutter and the determining circuit and the determining circuit Connecting, and accepting the shutter setting circuit, the setting signal of the determining circuit and the ambient brightness level signal, outputting a shutter and mode setting signal; and, - the camera has a plurality of shutter modes, and the input terminal 控制1 control circuit The connection can accept the shutter mode H signal that the control circuit rotates, and according to the shutter mode setting signal, decide which kind of fast should be used: mode 200848917 type. The automatic switching module can control the shutter mode inside the camera according to the signal generated by the sensing unit receiving the external light brightness and according to the setting of the fixed shutter setting circuit; thus, the external light brightness received by the sensing unit is generated. When changing, the shutter mode of the camera will also change, and the effect of automatically switching the shutter mode will be achieved. L mode of application] "called a Macquarie picture" is the invention - the shutter mode can be switched according to the change of ambient brightness A preferred embodiment of the speed camera includes: an early detection switch (1〇), an automatic switching module (20), and a camera (3 〇). -,, ^ 〇) is a detection 7L piece with inductive light brightness function, which can change the redundancy of the output according to the connected predicate, Μ山, 扪9, etc., to give different output breaks, for example, a photoresistor or a sense of brightness Measuring component. The self-switching module (2〇) includes a fixed i-two circuit (23), a judging circuit (2...-two-out interface (25), and an input 'wheel shutter setting circuit (21) A j26), wherein The output terminal of the control circuit (2 "output terminal 3 of the circuit (2 4 )) is connected to the input end of the output interface 1 (the output terminal 2 of the input interface (2 6 )). The wheel end; in addition, the output end of the input end of the sensing unit (:, the breaking surface (2 6 ) of the J breaking circuit (2 4 ) is connected to the output end of the wheel-in interface (2 5 ) Department 7 200848917 Connect the camera ((21) can be connected to... No, the fixed shutter setting circuit and the external control signal circuit. And the control circuit (2 / " change the switch Maoye Zhaoxiang saw, can be A combination logic circuit. ~, phase camera (3 〇) system is controlled by an external W for fast mode switching, gate nucleus, and can be connected, the unit (1.) can be based on the external light received. Road (2 4 ) different signal output circuits (2 4 ) according to the environment of the sensing part; (1 G ) input No., outside 3), also / knife into two different levels 'and output to the control circuit (2 circuit (24) output - H redundancy is insufficient (evening), the judgment (day) 兮 position, 1^ When the brightness of the external environment is sufficient (daytime), the judging circuit (24) is the control circuit (9 ς, Η, 弟, a position. ...... according to the judging circuit (2 4) and the solid state The door setting circuit f 9 Ί, n 殁 兮 士 士 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , A fixed shutter with a shutter or a grain type. 1 Refer to the second figure, which is a detailed circuit for the automatic switching module. 1Φ 4 η, d.) with the version of the road, the fixed shutter setting circuit (21 ) The fixed shutter set foot (J work) sequence of the package/four contacts is far away from the four contacts.

The resistors (R1 to R4) connected to each other are connected to the -voltage source at the other end of the resistor (R), wherein the external shutter setting signal can be accepted by the shutter setting pin 1). ^Control circuit ^ 2 3 ) includes serial-combined logic unit (U, - inverting unit (U5) and two resistors (R5, R6), 8 200848917, taking the preferred embodiment as an example, the combined logic unit (U i A ) is 7 4 Η C 3 2, wherein the 2nd, 5th, 1st, and 1st pins of the combinational logic unit (υ丄α) are respectively connected to the four fixed shutter setting feet (") The contact point, the fourth working position of the inverting unit (U5), the resistor 5) connected to the inverting unit (U5), the fourth working unit of the combined logic unit (u, A, 13) Between the 2nd pin and the ground, the private resistance (R 6 ) is connected in series between the 2nd pin of the inverting unit w and the CU 5) and the decision circuit (2 4 ). ) mainly includes - transistor-diode (D 1 ), one and phase crying r ττ 0, inversion w ( U 3 ), two resistors (R 8 , :〇: and two capacitors (ci, C2); The diode (the % pole of D is connected to the power source, and the cathode is connected in series with the resistor (r 8 ) and the collector of the transistor (Q 1 ), and the resistor is connected in series (R6). (Q1) collector 6) is connected to the phase difference unit (U 5 ) In the 2nd position, the emitter of the transistor (Q1) is grounded, and the transistor (qi): the pole is connected in series with the resistor (R1 〇) and then connected to the inverter (the 4th pin.) The interface, r τ 9 Λ ( 2 5 ) is an output foot with five contacts. The fifth contact is grounded, and the remaining 1~4 contacts are respectively associated with the combined logic unit (U1A). β 0 is connected. 丄AJ's brother 3, 6, 8, 1 1 pin connection (j ^ input, face (2 6) is a two-contact input pin (Un \ its second contact is grounded The first contact is connected to the brother 2 of the inverter, and the first contact is connected in series - resistor 200848917 (R 1 2) and a voltage source. The hai input pin (j 3 ) can be connected to an illuminance sensor, for example, an illuminance sensor of the type ρ 丁 ^ 4 ^ d 3 7 Ρ 1 1 , the illuminance sensor is used to output the electric Pan Pan Gan & a 〃 eight The brightness of the environment is proportional, so when the brother of the clothing is in the daytime, the second foot of the dry VA phase (U 3 ) is at a low level, and the reverse is crying (Tt Q - A ancient, Output to the transistor (Q 1 ) after 隹 (U 3 ) The base and the same level, at this time, the engraving unit (the port 5 々甩 day (Q 1 ) is turned on, so that the second pin of the inverting unit (port) is equivalently grounded and at a low level, The inverting element (U丄A) port rotates a south level signal, so that the first, fourth, ninth, and third pins of the combined logic SLR I are in a high level state. At the night of the night, the transistor (Q 1 ) is not turned on, and the power supply (high-level signal) connected to the inverting unit (T 1 ) % pole is output to the second pin of the output-low standard 2 'The inverse phase' (U5) thus works, 4, 9~ and the 4th, 13th pin of the 4 combination logic unit (U1A) is in the low level state.: The progress is further explained by the control circuit (ρ q, ψ石兮影机(3 ΓΜ ( 2 3 ) output to 泫 photographic camera (2 3 output 1^ 'clear reference to the third picture, is the control power 4) round the jth input and output signal truth table When the judging circuit (2 logical unit bits), the internal combination of the judging circuit (2 4 ) is the input signal of the 1st, 4th, 9th, and 13th pins of the high level (^), Judging when the judgment circuit (24) outputs the second quasi-number: L, 4, 1 (24) of the combinational logic unit (ϋ1Α) and the combination logic. 3, the p-position round-in signal is low Level (L); 科 早元 (U1A) 箓〇. ιη < brother 2, 5, 10, 12 feet 10 200848917 are connected to the output of the fixed shutter setting circuit (2 1 ) The combinatorial logic (U 1 A ) may be based on the output signals of different combinations of the fixed shutter setting circuits (2 1 ), and the rounding signals of the first, fourth, ninth, and third pins are used to make the combined logic unit (u 1 a ) One of the 3rd, 6th, 8th, and 1st pin outputs are combined to the output interface (2 5 ) to set the shutter of the camera (3 〇).

Wherein, when the rounding signal of the first, fourth, ninth, and 1-3th positions of the combined logical unit (U1A) is a high level (n), the preferred embodiment is taken as an example to represent the sensing unit (1) 0) The detected external ambient light is sufficient, regardless of the input status of the other input pins of the combinational logic unit (U丄A) (ie, the 2nd, 5th, i, and 2nd pins). The output state of each output pin of the combinational logic unit (U1A) (ie, 3, 6, and W, representing 8, 1 1) is high level (H). The camera (3 〇) is Auto shutter mode. And when the combination logic unit (U1A) is 丄, 4, 9, work

When the input signal of the 3-pin position is the low level (L), the input state is input according to each different combination of the 2nd, 5th, 1st, and 12th pins of the combinational logic unit (u1A), and the corresponding-output state is combined to The camera (2) ,) enables the camera (30) to set a specific shutter mode in accordance with the output state. Further, the automatic switching mode can be a programmable logic component, such as F, which can accept the sensing unit (1 can control or accept an external control, and (2 〇) can have the aforementioned function PGA, The signal of the CPLD or the single chip 0), and the control signal that accepts the use of the signal 'change output to the photo camera π 200848917 ~ Du: (3 0), so that the single camera can be used to control the camera (3 0 The effectiveness of the design to achieve a simplified design.

BRIEF DESCRIPTION OF THE DRAWINGS The first drawing is a block diagram of a preferred embodiment of the invention. The second figure is a detailed circuit of one of the automatic switching modules of the present invention. The figure is the figure of the present invention - the wheel and the output signal pair of the control circuit.

(1 〇) sensing unit (2 0) automatic switching module (2 1 ) fixed shutter setting circuit (2 3 ) control circuit (2 4 ) judgment circuit (2 5 ) output interface (2 6 ) wheel-in interface (3 〇 )Photo Camera ^ C 1 , C 2 ) Capacitance (D 1 ) Diode

丄) Fixed shutter setting foot 2) Round foot

Input pin 12 200848917 (U 1 A ) Combinational logic unit (U 3 ) Inverter (U 5 ) Inverting unit (Q 1 ) Transistor (R 1~R 1 0 ) Resistor 13

Claims (1)

200848917 X. Patent application scope: The speed sensor 2 automatically changes the shutter mode of the sensor to measure the brightness of the external environment; - the automatic switching module, the input terminal is connected to the sensing unit, the basin Including - a fixed shutter setting circuit 'which can accept a corresponding setting signal; and a first-prediction circuit' is generated from the input of the sensing unit at the output end of the sensing unit - I and then the corresponding core The local party level signal; the - control circuit, the two input terminals are respectively connected to the fixed circuit and the judging circuit, and the ☆ 疋 疋 疋 疋 — 玄 玄 玄 玄 玄 玄 玄 玄 玄 玄 玄... and ambient brightness level signal, output - shutter mode dog setting signal; and Shaanxi door type: camera, with multiple (four) door mode, : electric = 'acceptable to the control circuit output of the shutter mode setting; Said, according to the shutter mode setting signal, which shutter mode should be used to determine the self-reporting of the shutter mode. 2. According to the scope of the patent range, the wheel can be changed according to the ambient brightness:: the shutter mode is changed. The speed camera 'the automatic switching module comprises: a connection; a picture input interface 'the output of the wheel interface and the wheel end interface, the phase camera and the control circuit, and the input interface enters the wheel end The sensing unit and the determining circuit are respectively connected. - 3. The speed measuring camera that automatically switches the shutter mode according to the ambient brightness according to the environmental brightness 14 200848917, wherein the automatic switching module is a programmable logic element. 4) The speed measuring camera capable of automatically switching the shutter mode according to the change in ambient brightness as described in claim 3, wherein the sensing unit is a light sensing element. XI. Schema: As the next page. 15