CN201569414U

CN201569414U - Diameter detection sensor

Info

Publication number: CN201569414U
Application number: CN2009202141070U
Authority: CN
Inventors: 张鸣岐; 邹建兵; 王冠军; 张挪; 李正华
Original assignee: Shanghai Shijia Electroonic Science & Technology Co Ltd
Current assignee: Shanghai real intelligent Polytron Technologies Inc
Priority date: 2009-11-24
Filing date: 2009-11-24
Publication date: 2010-09-01
Anticipated expiration: 2019-11-24

Abstract

The utility model discloses a diameter detection sensor which comprises a three-way laser collimated light source, a CCD synchronous drive module, a three-way CCD unit, a CCD signal conditioning module, a single chip microprocessor, an output signal conversion and drive module and a light source drive adjustment module, wherein the three-way laser collimated light source envelops the detected object in a 120-degree distribution way; the CCD synchronous drive module generates a CCD synchronous drive pulse; the three-way CCD unit acquires optical signals from the three-way laser collimated light source and generates a diameter detection signal; the CCD signal conditioning module receives the diameter detection signal generated by the CCD unit, conditions the signal, and outputs the conditioned diameter detection signal to the single chip microprocessor for processing; the single chip microprocessor computes and generates a diameter detection signal for detecting the object as well as a light source power measured value signal; the output signal conversion and drive module receives the diameter detection signal output by the single chip microprocessor and outputs an analog voltage value corresponding to the diameter; and the light source drive adjustment module receives the light source power measured value signal computed by the single chip microprocessor and drives the three-way laser collimated light source. The diameter detection sensor of the utility model is free from environmental effect and has the advantage of high measurement accuracy.

Description

The diameter detecting sensor

Technical field

The utility model relates to a kind of sensor, particularly a kind of diameter detecting sensor.

Background technology

In tobacco business, the production and processing technology of filter stick for cigarettes is had national sector standard, and (circumference is 24.2～24.5 ± 0.2mm), will cause product rejection more greatly in case the error of filter stick for cigarettes departs from scope.Filter stick for cigarettes make-up machines such as existing KDF2, KDF3 type all adopt the air pressure stream weight testing method to the diameter detection of filter stick, its measuring accuracy is very low, and be subjected to multiple such environmental effects, thereby the filter stick diameter On-line Control that constitutes with this detection means and control module can not get normal use, and is in paralyzed state mostly.

The utility model content

Technical problem to be solved in the utility model provides a kind of diameter detecting sensor, and it is not affected by environment and measuring accuracy is high.

For solveing the technical problem, the utility model provides a kind of diameter detecting sensor, it is characterized in that it comprises:

Three tunnel laser parallel light sources, this three tunnel laser parallel light source are 120 degree distributions testee are surrounded;

CCD driven in synchronism module, it produces the pulse of CCD driven in synchronism;

Three road CCD unit, it is connected with CCD driven in synchronism module, and it receives the pulse of CCD driven in synchronism, and three tunnel laser parallel light sources are carried out the optical signalling collection and produce the diameter detection signal;

The ccd signal conditioning module, it is connected with three road CCD unit, and it receives behind the diameter detection signal that the CCD unit produces and nurses one's health, and exports to single-chip microcomputer through the diameter detection signal after the conditioning and handles;

Single-chip microcomputer, it is connected with the ccd signal conditioning module with CCD driven in synchronism module, and it receives diameter detection signal and the pulse of CCD driven in synchronism after the conditioning, and calculates the detection diameter signal that produces inspected object and produce the light source power measured value signal;

Output signal conversion and driver module, it is connected with single-chip microcomputer, and it receives the detection diameter signal of single-chip microcomputer output, and output diameter corresponding simulating magnitude of voltage;

Light source drives adjusting module, and it is connected between three tunnel laser parallel light sources and the single-chip microcomputer, and it receives the light source power measured value signal of single-chip microcomputer calculating and drives three tunnel laser parallel light sources.

Preferably, the CCD unit, every road in described three road CCD unit is positioned at the opposite of corresponding one tunnel laser parallel light source.

Preferably, described CCD driven in synchronism module comprises frequency dividing circuit, RC oscillator, crystal oscillator and sequential control circuit, and frequency dividing circuit is connected with the RC oscillator, and frequency dividing circuit, crystal oscillator and sequential control circuit are connected.

Positive progressive effect of the present utility model is: the utility model diameter detecting sensor is improved in the tobacco business diameter detection mode that cigarette filter stick or cigarette are propped up, and improves the diameter accuracy of detection that filter stick or cigarette prop up and the reliability of detection.And, the utility model diameter detecting sensor adopts optical detection principle to realize non-cpntact measurement, handle and thereby the diameter accurate measurement of bar realized that filter stick or cigarette prop up and wait by a series of control circuit in conjunction with high performance single-chip microcomputer, solved the simple air pressure flow measurement of former utilization and be subjected to the influence of air pressure fluctuation, source of the gas moisture and contact type measurement to be subjected to relative influence such as filter stick motion, vibration equipment, the signals collecting before having solved simultaneously and the technological deficiency of computing aspect.

Description of drawings

Fig. 1 is the block diagram of system of the utility model diameter detecting sensor.

Fig. 2 is the system signal process flow diagram of the utility model diameter detecting sensor.

Fig. 3 is the circuit theory diagrams of the utility model diameter detecting sensor.

Fig. 4 is the inner structure synoptic diagram after the utility model diameter detecting sensor is installed.

Fig. 5 is the external structure synoptic diagram after the utility model diameter detecting sensor is installed.

Embodiment

Lift a preferred embodiment below, and come the clearer the utility model that intactly illustrates in conjunction with the accompanying drawings.

As shown in Figure 1 to Figure 3, the utility model diameter detecting sensor comprises three tunnel laser parallel light sources (the i.e. first laser parallel light source 11, the second laser parallel light source 12 and the 3rd laser parallel light source 13), three road CCD (Charge Coupled Device, Charge Coupled Device (CCD)) (i.e. CCD unit 21, unit, the 2nd CCD unit 22 and the 3rd CCD unit 23), ccd signal conditioning module 3, light source drives adjusting module 4, CCD driven in synchronism module 5, single-chip microcomputer 6 and output signal conversion and driver module 7, CCD unit, every road is positioned at the opposite of corresponding one tunnel laser parallel light source, three tunnel laser parallel light sources drive adjusting module 4 with light source and are connected, light source drives adjusting module 4 and is connected with single-chip microcomputer 6, three road CCD unit are connected with CCD driven in synchronism module 5 with ccd signal conditioning module 3, ccd signal conditioning module 3 is connected with single-chip microcomputer 6 with CCD driven in synchronism module 5, conversion is connected with driver module 7 single-chip microcomputer 6 with output signal, the CCD unit is made up of the photoelectricity chip (model is C3575) that is coupled, light source drives adjusting module 4 and is made up of operational amplifier and NPN triode, CCD driven in synchronism module 5 comprises frequency dividing circuit, the RC oscillator, crystal oscillator and sequential control circuit, frequency dividing circuit is connected with the RC oscillator, frequency dividing circuit, crystal oscillator is connected with sequential control circuit, sequential control circuit is made up of relevant trigger and a series of gate circuit, ccd signal conditioning module 3 comprises first filter amplification circuit, second filter amplification circuit, the 3rd filter amplification circuit, first binarization circuit, second binarization circuit and the 3rd binarization circuit, first to the 3rd filter amplification circuit all comprises interconnective filtering circuit and differential amplifier circuit, single-chip microcomputer 6 adopts the XC167 type single-chip microcomputer of company of Infineon, the output signal conversion comprises output driving circuit with driver module 7, signal isolation circuit, follow circuit and D/A (digital-to-analog) change-over circuit, connect a follow circuit between output driving circuit and D/A (digital-to-analog) change-over circuit, three tunnel laser parallel light sources and three road CCD unit are mapped, promptly a CCD unit 21 is positioned at the opposite of the first laser parallel light source 11, the 2nd CCD unit 22 is positioned at the opposite of the second laser parallel light source 12, the 3rd CCD unit 23 is positioned at the opposite of the 3rd laser parallel light source 13, first filter amplification circuit is connected between a CCD unit 21 and first binarization circuit, second filter amplification circuit is connected between the 2nd CCD unit 22 and second binarization circuit, and the 3rd filter amplification circuit is connected between the 3rd CCD unit 23 and the 3rd binarization circuit.

Three tunnel laser parallel light sources obtain the even brightness strip source through after the optical processing, the light source that utilizes strip source to detect as diameter; CCD driven in synchronism module 5 produces the basic pulse that is used for line frequency and frame frequency respectively by crystal oscillator and RC oscillator, and process frequency dividing circuit and sequential control circuit generation CCD driven in synchronism pulse afterwards and single-chip microcomputer are finished the synchronizing pulse of signals collecting.The CCD unit receives the pulse of CCD driven in synchronism, three tunnel laser parallel light sources are carried out the optical signalling collection and produce the diameter detection signal, specifically be that three travel permit shape directional lights that strip source sends are 120 degree and distribute and form a circle and filter stick (testee) is surrounded, simultaneously filter stick is shone, the CCD unit that every travel permit shape directional light passes behind the filter stick respectively by the opposite receives, the bar shaped directional light that sends as the first laser parallel light source 11 receives a CCD unit 21 by a CCD unit 21 after passing filter stick, the 2nd CCD unit 22 and the 3rd CCD unit 23 are converted into the diameter detection signal with three travel permit shape directional lights of correspondence; Carry out signal filtering processing, signal gain adjustment, signal binary conversion treatment and signal level conversion behind the diameter detection signal that ccd signal conditioning module 3 reception CCD unit produce, export to single-chip microcomputer through the diameter detection signal after the conditioning and handle; Single-chip microcomputer receives diameter detection signal and the pulse of CCD driven in synchronism after the conditioning, finishing the data collection and analysis of signal handles, calculate the detection diameter signal that produces inspected object on the one hand, measured value repeatedly is weighted average calculating operation, thereby overcome the detection error, thereby single-chip microcomputer obtains the light source power measured value signal by collection and calculating to CCD unit simulation signal on the other hand, and the laser parallel light source power is realized automatic gain control; The output signal conversion receives the detection diameter signal that single-chip microcomputer is exported with driver module 7, amplifies and isolation processing output diameter signal through digital-to-analog conversion, electric current, and this diameter signal is a testee diameter corresponding simulating magnitude of voltage; Light source drives adjusting module 4 and receives the light source power measured value signal that single-chip microcomputer calculates, the light source power measured value signal is amplified rear drive three tunnel laser parallel light sources through digital-to-analog conversion, electric current, thereby automatic gain control by chip microcontroller laser parallel light source luminous power, thereby make the diameter detecting sensor possess adaptation function, overcome the detection error that series of factors such as surround lighting and light source ages cause.

As shown in Figure 4 and Figure 5, the structure of the utility model diameter detecting sensor comprises housing 31, light source 32, control circuit board 33, CCD wiring board 34, detection head 35, cleaning head 36, diaphragm 37, reflecting plate 38, connector 39 and clean air joint 40, housing 31 provides the installation of light source 32, control circuit board 33, connector 39 and clean air joint 40 with fixing when satisfying the application installation requirement, and promptly light source 32, control circuit board 33, connector 39 and clean air joint 40 are fastened on respectively on the corresponding position of housing 31; Detection head 35 is the mounting bracket of CCD wiring board 34, diaphragm 37 and reflecting plate 38, and detection head 35 adopts screw to be fastenedly connected with housing 31; Cleaning head 36 mainly comprises cleaning chamber and seal cover board, the clean air that it introduces clean air joint 40 acts on the diaphragm, thereby guarantee to detect the cleaning of light path, avoid light path to pollute the measuring error of bringing, cleaning head 36 is fastenedly connected with housing 31 after the seal cover board screw connects.

In sum, the utility model diameter detecting sensor is improved in the tobacco business diameter detection mode that cigarette filter stick or cigarette are propped up, and improves the diameter accuracy of detection that filter stick or cigarette prop up and the reliability of detection.And, the utility model diameter detecting sensor adopts optical detection principle to realize non-cpntact measurement, handle and thereby the diameter accurate measurement of bar realized that filter stick or cigarette prop up and wait by a series of control circuit in conjunction with high performance single-chip microcomputer, solved the simple air pressure flow measurement of former utilization and be subjected to the influence of air pressure fluctuation, source of the gas moisture and contact type measurement to be subjected to relative influence such as filter stick motion, vibration equipment, the signals collecting before having solved simultaneously and the technological deficiency of computing aspect.

Though more than described embodiment of the present utility model, but those skilled in the art is to be understood that, these only illustrate, and under the prerequisite that does not deviate from principle of the present utility model and essence, can make numerous variations or modification to these embodiments.Therefore, protection domain of the present utility model is limited by appended claims.

Claims

1. diameter detecting sensor is characterized in that it comprises:

2. diameter detecting sensor as claimed in claim 1 is characterized in that, the CCD unit, every road in described three road CCD unit is positioned at the opposite of corresponding one tunnel laser parallel light source.

3. diameter detecting sensor as claimed in claim 1, it is characterized in that, described CCD driven in synchronism module comprises frequency dividing circuit, RC oscillator, crystal oscillator and sequential control circuit, and frequency dividing circuit is connected with the RC oscillator, and frequency dividing circuit, crystal oscillator and sequential control circuit are connected.