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Pendulum coordinatograph

A technology of coordinate instrument and vertical line, applied in the field of vertical line coordinate instrument, can solve the problems of LED light source damage and LED light source damage, and achieve the effect of prolonging life, prolonging service life and controlling light decay.

Pending Publication Date: 2018-06-05
CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the present invention provides a vertical line coordinate instrument, so that the constant current drive circuit can be used to drive the light-emitting diode, avoiding damage to the LED light source caused by excessive current, and solving the problem of the large current on the LED of the vertical line coordinate instrument. Damage to the light source

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  • Pendulum coordinatograph
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Embodiment Construction

[0031] In order to make the technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] figure 1 It is a structural schematic diagram of the vertical line coordinate instrument in the embodiment of the present invention, figure 2 It is a schematic circuit diagram of a constant current drive circuit of a light emitting diode in an embodiment of the present invention. Such as figure 1 and figure 2 As shown, the vertical line coordinate instrument 20 in the present invention includes: a parallel light generator 21, an optical filter 22, an image sensor 23, a data processing unit 24, a display unit 25, a detection control unit 26 and a power supply unit 27;

[0033] Wherein, the parallel light generator 21 includes an LED light source; the LED light source is driven by a constant current drive circuit of a light emitting dio...

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Abstract

The invention provides a pendulum coordinatograph using a constant current driving circuit of a light emitting diode. The pendulum coordinatograph comprises a parallel light generator, a light filter,an image sensor, a data processing unit, a display unit, a detection control unit and a power supply unit, wherein the parallel light generator comprises an LED (light emitting diode) light source; the LED light source is driven by the constant current driving circuit of the light emitting diode; and the constant current driving circuit of the light emitting diode comprises a reference voltage source VR1, dual operational amplifier U1, a resistor R1, a resistor R2, a dual operational amplifier U2, a capacitor C1, an MOS (metal oxide semiconductor) field effect switch / power amplifier tube Q1,a silicon NPN tube Q2, a resistor R3, an adjustable resistor R0 and a light emitting diode D1. According to the coordinatograph, the constant current driving circuit can be used for driving the lightemitting diode in the pendulum coordinatograph; the damage of the LED light source caused by excessive current is avoided; and the problem of the damage to the LED light source of the pendulum coordinatograph due to heavy current is solved.

Description

technical field [0001] The present application relates to the technical field of structural monitoring in civil engineering, in particular to a vertical coordinate instrument using a constant current drive circuit of a light emitting diode. Background technique [0002] The vertical line coordinate instrument in the prior art adopts the combination of light-emitting diode (LED) light source and CCD technology to form equipment, and captures the position of the vertical wire with a diameter of about 1mm under the CCD lens, so as to achieve the purpose of displacement measurement. [0003] In the prior art, the LED light source adjustment circuit in the vertical line coordinate instrument generally adopts a constant voltage source adjustment circuit. In the constant voltage source adjustment circuit in the prior art, the red light emitting diode is generally used as the LED light source. The compact LM317 supplies power to the Light Emitting Diode (LED). [0004] However, du...

Claims

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Application Information

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IPC IPC(8): H05B33/08G01C15/10H05B44/00
CPCG01C15/105H05B45/00Y02B20/30
Inventor 张会东高璐董月亮李朋宾周浩
Owner CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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