CN201173787Y

CN201173787Y - Rotate speed torque transducer photo generator

Info

Publication number: CN201173787Y
Application number: CNU2008200525391U
Authority: CN
Inventors: 余以道; 罗善明
Original assignee: Hunan University of Science and Technology
Current assignee: Hunan University of Science and Technology
Priority date: 2008-03-12
Filing date: 2008-03-12
Publication date: 2008-12-31
Anticipated expiration: 2018-03-12

Abstract

The utility model belongs to a photoelectric signal generator on a sensor, which is used for measuring the running speed and the running torque of a shaft. Various devices for measuring the running speed and the running torque in the prior art have the defects of large abrasion, short life, complex structure and difficult processing, and does not fit the high speed measurement. In order to overcome the defects, the photoelectric signal generator provides the following technical scheme: the photoelectric signal generator of a running speed and running torque sensor comprises an elastic shaft. A plurality of reflex streaks in the same shape are evenly coated with reflex materials on symmetrical positions on the outer circumference surface of the both ends of an elastic shaft in the shell of the sensor. Installation panels are fixed on the shell corresponding to the reflex streaks at the both ends of the shaft. The same position on the installation panels is fixedly provided with CD driver laser heads which are connected with a measuring circuit. The running speed and the running torque are measured through picking the reflex signals of the reflex streaks at the both ends of the shaft by the CD driver laser heads, so the photoelectric signal generator has the advantages of simple structure, easy processing, no abrasion and long service life. The photoelectric signal generator on a sensor is suitable for high speed measurement.

Description

The torque and speed sensors photo-generator

Technical field

The utility model belongs to the mechanical ﹠ electrical technology field, is specifically related to the photo-generator on a kind of sensor that is used to measure the rotating shaft rotational speed and torque.

Background technology

At present, measure the rotational speed and torque of rotating shaft, widespread use be to adopt elastic shaft as sensitive element, measure by picking up the rotational speed and torque signal that produces when elastic shaft rotates, method commonly used has following several:

(1) the contact-type signal generator formed by cam contact, carbon brush slip-ring and the tongue tube at elastic shaft two ends of rotational speed and torque signal generator; But this contact-type signal generator because open during the contact, time closes, so frequency of operation is low, pitting of contact, serious wear and cause serviceable life shorter.

(2) the magnetoelectricity type signal generator of forming by the signal excitation gear at elastic shaft two ends and fixing magnetoelectricity collectting message head; But the elastic shaft distortion easily takes place owing to the error of Gear Processing produces rotating shaft unbalance dynamic phenomenon in this magnetoelectricity type signal generator during high-speed rotation, the synchronous signal power is subjected to the influence of rotating speed, can cause certain measuring errors.

(3) by the light lattice dish at elastic shaft two ends be separately fixed at the light source of light lattice dish both sides and the transmission-type photoelectric type signal generator that photovalve is formed; But this transmission-type photoelectric type signal generator easily produces the unbalance dynamic phenomenon when the high-speed rotation because of the quality of light lattice dish is inhomogeneous, and structure is complicated simultaneously.

(4) the magnetic grid type signal generator of forming by the magnetic grid at elastic shaft two ends and fixing magnetic head; Magnetic grid type signal generator is because the magnetic grid signal is intensive, and the magnetic grid semaphore that rotating shaft is turned around is big, and magnetic head pickoff signals speed is limited, so be not suitable for measuring at a high speed.

Summary of the invention

The purpose of this utility model is at the above-mentioned defective that exists in the prior art, and a kind of photoelectric type signal generator of reflective torque and speed sensors is provided.

The utility model is to realize above-mentioned purpose by the following technical solutions: the photo-generator of this torque and speed sensors, comprise elastic shaft parts, the two ends of these elastic shaft parts are installed on the housing of torque and speed sensors by bearing, bearing seat; Be positioned at the symmetric position place on the axle two ends external peripheral surface of housing at these elastic shaft parts, with the even identical reflex streak of the some shapes of spraying of reflectorized material; Be fixed with installing plate on the corresponding housing of the reflex streak at axle two ends, be fixed with laser pick-up head at the same position place of installing plate, laser pick-up head links to each other with metering circuit.

When elastic shaft turned around, laser pick-up head produced the pulse signal corresponding with reflex streak, by the processing of metering circuit, can obtain rotating speed.When twisting distortion when the resilient bearing torque suspension, the reflex streak at elastic shaft two ends can take place to misplace accordingly with torsional deflection, then the pulse signal of laser pick-up head generation also will take place and the corresponding phase differential of torsional deflection, by the processing of metering circuit, can obtain torque.Because reflex streak is a limited quantity, and laser pick-up head pickoff signals speed is fast, so can measure when the elastic shaft high speed rotating; And photo-generator of the present utility model is simple in structure, is easy to processing; Do not have wearing and tearing, prolong serviceable life.

Description of drawings

Fig. 1 is the sectional view that has the torque and speed sensors of reflecting light electric signal generator of the present utility model;

Fig. 2 is an elastic shaft block diagram of the present utility model.

Embodiment

Below in conjunction with drawings and Examples the utility model is described in further detail.

Referring to Fig. 1 and Fig. 2, the torque and speed sensors with reflecting light electric signal generator of the present utility model comprises 1, two bearing (ball) cover 2 of 7, one elastic shaft parts of sensor housing, bearing seat 3, bearing 4, laser pick-up head 6 and installing plate 5 thereof.Elastic shaft parts 1 evenly spray shape identical reflex streak 9 with symmetric position place on the external peripheral surface of two ends with reflectorized material by elastic shaft 8 and form.Two laser pick-up heads 6 are separately fixed on the symmetric position of housing 7 by mounting disc 5, and keep identical measuring distance with the reflex streak 9 at elastic shaft parts 1 two ends.

Described laser pick-up head 6 is made up of light source and the catoptrical photovalve of acceptance.

Principle of work of the present utility model is, elastic shaft parts 1 are when rotating, the reflex streak 9 at axle two ends rotates synchronously, when reflex streak 9 turn to laser pick-up head 6 under the time, the irradiate light that laser head 6 sends is to reflex streak 9, and light is reflected on the laser head 6, is picked up by the photovalve on the laser head 6 to be transformed into electric impulse signal, handle by metering circuit then, draw the rotating speed of elastic shaft 8.When elastic shaft 8 transmitting torques, elastic shaft 8 distortion that twists, the reflex streak 9 at two ends will take place and the corresponding dislocation of elastic shaft 8 distortion, like this, the heliogram that the laser pick-up head 6 at two ends picks up will occur and elastic shaft 8 distortion corresponding time difference, it is poor that the electric impulse signal that produces also will respective phase occur, handles by metering circuit then, draws elastic shaft 8 torque transmitted.

Claims

1, a kind of torque and speed sensors photo-generator, comprise elastic shaft parts (1), the two ends of elastic shaft parts (1) are installed on the housing (7) of torque and speed sensors by bearing (4), bearing seat (3), it is characterized in that: elastic shaft parts (1) comprise elastic shaft (8), be positioned at the symmetric position place on the axle two ends external peripheral surface of housing (7) at elastic shaft (8), with the even identical reflex streak (9) of the some shapes of spraying of reflectorized material; Be fixed with installing plate (5) on the corresponding housing of reflex streak (9) (7) at axle two ends, be fixed with laser pick-up head (6) at the same position place of installing plate (5), laser pick-up head (6) links to each other with metering circuit.

2, torque and speed sensors photo-generator according to claim 1 is characterized in that: described laser pick-up head (6) comprises light source and accepts catoptrical photovalve.