Accurately controlled grating

Abstract

The utility model discloses a grating capable of being accurately controlled. Comprising a grating body, a rotating base used for installing the grating body, a driving device used for driving the rotating base to rotate, a first induction rod synchronously rotating with the rotating base, a zero position sensor used for detecting the first induction rod, and a target position sensor arranged on one side of the zero position sensor and used for detecting the first induction rod. The second induction rod rotates along with the driving device; and the calibration sensor is used for detecting the second induction rod. By arranging the target position sensor and the calibration sensor, the first sensing rod and the second sensing rod can be detected respectively, and approval is carried out according to two detection data, so that whether the grating rotates in place or not according to an instruction can be calibrated in each time of use, and a spectral band with accurate wavelength is ensured to be obtained.

Description

TECHNICAL FIELD

[0001] The utility model belongs to grating, specifically relates to a grating of accurate control. BACKGROUND

[0002] The fluorescence detector mainly passes through the light source to send the exciting light, irradiates the fluorescent substance, and then the fluorescence emitted by the fluorescent substance becomes monochromatic fluorescence through the monochromator, and then is irradiated to the sample. The photomultiplier tube amplifies the received photocurrent and transmits to the recorder, so as to complete the detection. When the xenon lamp as the light source emits fluorescence and is reflected by the condenser lens through the slit, it is set to the grating through the reflector, and the required wavelength spectral band is formed by the grating reflection.

[0003] Since the existing grating is only provided with one zero position sensor, after each start, the grating is first rotated to the zero position, and then starts to rotate to the target position according to the setting to obtain the required wavelength. However, since whether the grating is actually rotated accurately to the position or not, there is no any detection means. If there is instruction interference and communication problem, the effectiveness of the fluorescence detection cannot be guaranteed. SUMMARY

[0004] The utility model wants to solve the technical problem to provide a kind of grating of accurate control, can accurately control grating rotation to position to obtain the required wavelength spectral band.

[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0006] A kind of grating of accurate control, including grating body, with the rotating base for installing grating body, with the driving device for driving rotating base rotation, with the first induction rod for rotating with the rotating base, with the zero position sensor for detecting the first induction rod, further include the target position sensor for detecting the first induction rod being arranged at the one side of zero position sensor, with the second induction rod for rotating with the driving device, with the calibration sensor for detecting the second induction rod.

[0007] The driving device includes the driving motor connected to the lower portion of rotating base and the speed reducer connected to the lower portion of driving motor, and the second induction rod is connected with the main shaft of speed reducer.

[0008] The zero position sensor, target position sensor and calibration sensor all adopt photoelectric switch.

[0009] A kind of grating of accurate control is adopted in the utility model, the target position sensor and calibration sensor can be detected respectively by being arranged to the first induction rod and the second induction rod, and the two detection data are verified, so that the rotation of grating according to instruction can be calibrated every time, to ensure that the spectral band of accurate wavelength is obtained. BRIEF DESCRIPTION OF DRAWINGS

[0010] The utility model will be illustrated in detail below in combination with the drawings and specific embodiments:

[0011] Figure 1 It is installation schematic drawing of the precision controlled grating of the utility model;

[0012] Figure 2 It is structure schematic drawing of the precision controlled grating of the utility model;

[0013] Figure 3 It is installation schematic drawing of the zero position sensor and target position sensor of the utility model;

[0014] Figure 4 It is schematic diagram of the precision controlled grating of the utility model in the fluorescence detector. Specific embodiments

[0015] As Figures 1-3 The utility model discloses a precision controlled grating, which mainly comprises a grating body 5, a rotating base 22 for mounting the grating body 5, a driving device for driving the rotating base 22 to rotate, a first sensing rod 24 rotating synchronously with the rotating base 22, a zero position sensor 25 for detecting the first sensing rod 24, the grating body 5 is mounted on the rotating base 22, the driving device comprises a driving motor 6 connected below the rotating base 22 and a speed reducer 7 connected below the driving motor 6, the rotating base 22 is driven to rotate by the driving motor 6, so that the grating body 5 and the first sensing rod 24 are rotated by a corresponding angle. The grating further comprises a target position sensor 26 arranged on one side of the zero position sensor 25 and used for detecting the first sensing rod 24, a second sensing rod 27 horizontally connected to a main shaft 8 of the speed reducer 7 and capable of rotating with the main shaft of the speed reducer 7, and a calibration sensor 28 arranged outside the speed reducer 7 and used for detecting the second sensing rod 27. The zero position sensor 25, the target position sensor 26 and the calibration sensor 28 can all adopt photoelectric switches.

[0016] The working principle of the grating is as follows: after starting each time, the driving motor 6 drives the grating to rotate to the position where the first sensing rod 24 is detected by the zero position sensor 25, and stops at the zero position, and then can rotate to the target position according to the instruction, when the first sensing rod 24 is detected by the target position sensor 26, the calibration sensor 28 also obtains the signal of the second sensing rod 27, and the two signals can match (the first sensing rod 24 and the second sensing rod 27 have a corresponding speed ratio), which indicates that the grating is rotated to the position and can accurately reflect the set wavelength spectral band.

[0017] The precision controlled grating 1 of the utility model of the utility model is applied to a fluorescence detector, such as Figure 4As shown, the light reflector can be installed between the light source 2 and the detection groove 3, and between the detection groove 3 and the photomultiplier 4 of the fluorescence detector, and reflects the incident fluorescence to obtain a spectrum band of a set wavelength.

[0018] However, those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and are not used as a limitation of the present application, as long as the changes and modifications of the above described embodiments are within the scope of the present application.

Claims

1. A precision-controlled grating, comprising a grating body, a rotating base for mounting the grating body, a driving device for driving the rotating base to rotate, a first sensing rod rotating synchronously with the rotating base, and a zero-position sensor for detecting the first sensing rod, characterized in that: The application also comprises a target position sensor arranged on one side of the zero position sensor and used for detecting the first sensing rod, a second sensing rod rotating together with the driving device, and a calibration sensor used for detecting the second sensing rod.

2. The precision controlled grating of claim 1, wherein: The driving device comprises a driving motor connected to the lower side of the rotating base and a speed reducer connected to the lower side of the driving motor, and the second sensing rod is connected to the main shaft of the speed reducer.

3. The precision controlled grating of claim 1 or 2, wherein: The zero position sensor, the target position sensor and the calibration sensor are all photoelectric switches.

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