SONIC TENSION METER U-507
|
|
|
|
|
More user- friendly through great upgrading of functions.
Higher functions are realized at an improved cost / performance ratio
Sonic tension meter by Gates Unitta Asia.
Analyzes belt tension with no contact by analyzing acoustic wave.
Our innovative tension meter has been further upgraded.
(Patent Pending)
Measurement of belt tension, closely related with the life of belt, has so far greatly depended on the measurer's scent, and sometimes involved rather a significant individual difference in measurement result.
|
|
Now the sonic belt tension meter has been developed in order to allow anybody to make measurement easily and correctly. Acoustic wave (natural frequency) generated from a belt is captured by sensor, and is processed by high-performance computer. Belt tension is accurately displayed in digital mode.
Upon our customer's request bigger LCD is equipped in U507, which shows extended information. It was developed again more friendly to users. It also incorporates a lot of new features such as improved sensitivity of microphone and extended area of frequency, and further realizes a cost/ performance ratio greater than so far.
|
|
|
 Measurement principle of belt tension
|
Overview
When the belt stretched between pulleys is subjected to impact, it oscillates first with an irregular waveform containing high- frequency component and impact component, then progresses to a regular waveform intrinsic to the belt. Such oscillation attenuates in a short time, and in addition the oscillation of high order component is generated, therefore it was very difficult so far to capture the processing system was developed which captures oscillation frequency making full use of microcomputer, which attained this purpose. Calculation formula contained in the program enables display of accurate tension.
[Patent: No. 1931781]
|
|
|
Measurement step
Gain adjustment (automatic canceling of background noise)
This unit measure the surrounding noise environment periodically after power-on until pressing of "MEASURE" button, and automatically adjusts the sensitivity of microphone. Press "MEASURE" button to fix the sensitivity of microphone.
Detection of vibration waveform
The microphone detects sonic wave which was generated by flipping the static belt with a finger.
Removal of noise component
Self-contained filter automatically removes noise component.
Measurement of cycle
Cycle measurement circuit measures every cycle of input waveform.
Signal processing
Measures basic waveform by oscillation pattern which differs from condition to condition by data processing established in simulation.
Frequency conversion process
Converts continuous stable waveform into frequency.
Tension calculation process
The unit converts belt tension when unit weight, width, and span length of corresponding belt are input with numeric key.
Calculation formula
|
| Tension: |
 |
|
M: Unit mass (For belt: Per g/1m L x 1 mm W, For wire: Per 1m length) |
|
W: Width (For belt: Input the belt width in mm, For wire: Input "1" which represents "piece".) |
|
S: Measuring span length (mm) |
|
f: Primary intrinsic frequency of belt (Hz) measured by sensor. |
|
|
|
New functions
|
Mounting graphic LCD.
By mounting a graphic LCD U507 is capable of displaying by far a greater information volume than the conventional unit.
| Dual displays of measured tension and frequency |
Dual display of measured value and standard tension (target value) |
Triple display of unit mass, belt width, and span |
 |
 |
 |
| Possible to confirm the tension and frequency at the same time. |
Comparison between measured value and standard tension (target value) is enabled. (Timing belt only) |
Input data can be checked at a glance. |
Backlight Equipped
LCD newly equipped with backlight has further improved workability in darkness, etc.
Unit mass of timing belt is preinstalled.
Conventional model (U-505) used a system to input unit mass manually for each belt type, but U-507 displays unit mass in a moment when a belt type is specified. (Manual input is also accepted.)
 |
| Data is already input of timing belt 30 types and V-belt 16 types. |
Microphone performance improved
Microphone sensitivity in low frequency range has been improved. It is effective in long span of large-size belt, etc.
Measurement frequency area extended
Conventional model (U-505) used a measurement frequency up to 1000 Hz at the maximum, but while U-505 accepts up to 1000Hz at the maximum. It is effective in measuring high frequency area of short span of belt, wire, etc.
Data selecting function enriched
Data selecting function to save input data is expanded to 20 types. (10 types of conventional model (U-505).)
|
|
Automatic cancellation of background noise by automatic gain adjustment
Noise environment around is measured and microphone sensitivity adjusted automatically after input of power until "MEASURE" button is pressed. Microphone sensitivity is fixed by pressingl "MEASURE" button.
Basic specification of U-505 remains the same.
 Automatic trigger function
Protection of input data by mounting EEP-ROM
Saving energy by automatic power-off function
(It turns off automatically in about 5 minutes.)
Ready for measurement in narrow space
Sensor unit (microphone) is a tiny small single microphone, which allows easy measurement in narrow space. (Compatible to U-505)
Traceability system established
The sonic wave belt tension meter series compares the change of sonic wave taken from the microphone with the basic transmitter built in the body thereby measuring the frequency (while measurement of absolute for sonic pressure is impossible, which is affected by deterioration of vibration receiving film of microphone). Data is processed digitally. Therefore this model is free from drift of value due to deterioration with time and wear and abrasion associated with use, and requires no periodic inspection in principle. However, traceability system of measuring instrument which is essential for acquiring ISO 9000 is established and system is arranged to issue an inspection result report and traceability certificate. Calibrator is also available to be provided.
Light- weight and compact design for mobility.
This model is designed light and compact easy to carry, and uses only usual battery. It allows measurement of tension in various sites, and helps the users keeping maintenance of equipment, etc.
|
| Specification of Sonic Wave Belt tension Meter U-507 |
|
Model
|
U-507
|
| Feature |
Graphic LCD screen, Equipped with backlight, 46 types of belt, and Unit mass preinstalled, Automatic gain control, 20 types of setting memory, Automatic trigger, and automatic power-off function
|
| Measurement range |
10Hz~5,000Hz
|
| Power supply |
Alkaline dry cell (AAA x 2)
|
| Outer dimension |
59 wide x 26 thick x 160 long (mm)
|
| Mass |
120g
|
| Accessory |
Sonic wave microphone (flexible arm type)
Carrying case
Alkaline dry cell (AAA x 2)
|
| Example of measurement |
Example 1: Timing belt
[For 8YU tooth type x 20 mm wide, span length 250 mm]
Input: M = 5.2
 (unit mass per g/mm wide x m long)
W = 20 (mm wide)
S = 250(mm span length)
Relation between tension (N)
and frequency (Hz) 2.6N/
10 Hz ~ 9.360 N/600 Hz
|
Example 2: V-ribbed belt
[For micro V/PK section x 5 ribs, span length 250 mm]
Input: M = 21.0
(unit mass per g/rib x
m length)
W = 5.0 (number of ribs),
S = 250 (mm span length)
Relation between tension (N)
and frequency (Hz) 2.63N/
10 Hz ~ 9.450 kg/600 Hz
|
Example 3: Steel wire
[For steel wire of diameter 0.6mm, span length 50 mm]
Input: M = 1.3
(unit mass per g/mm
length)
W = 1.0 (Enter 1 because
steel wire is single.)
Relation between tension (N)
and frequency (Hz) 0N/
10 Hz ~ 325N/ 5000 Hz
|
|
Note) Tension calculation system and input capacity:
[M = 000.0g/m, W = 000.0 mm/#R, S = 0000 mm]
Note in use
|
Read the operation manual carefully for proper use.
|
|
Always make sure that the machine is stopped by turning off motor power or the like before measuring the tension.
|
|
Use this product only for measuring the tension. |
|
Adhesion of water or grease to this product, or shock given to the unit by dropping may cause failure or malfunction. Use caution well enough in handing the unit. |
Option
|
Model
|
Feature
|
Transmission frequency |
Frequency angle |
Output waveform |
Distortion factor |
|
Tension meter certification device U-305-OS1
|
Special device for certifying the frequency of sonic wave belt tension meter
(oscillation transmitter)
|
5 points of
25 Hz, 90 Hz, 500 Hz, 2 kHz, and 4kHz
|
0.1% or below |
Sine wave |
Within 1% |
| Out voltage |
Current consumption |
Power supply |
Outer dimension |
Mass |
Use environment |
| 20mV (P-P) |
50 mA
(in outputting 10 mA or below
(in no outputting)
|
Dry cell (AAA x 4)
AC adapter
(DC 6V, 50 mA)
The same as U-305
|
155 (W) x 46 (H) x 134 (D) mm |
U300g |
-10 to 50¡C
Below 80%
(Free from condensation)
|
|
|
|
