Brief introduction

The DY69 forward and reverse rotation speed sensor is used to detect the speed and linear velocity of the wheel axle, and the speed of the measured object can also be obtained through calculation and processing. This sensor has good low-frequency and high-frequency characteristics. Low frequency can reach 0Hz, used for zero speed measurement of rotating machinery, up to 20KHz, which can meet the high-speed measurement requirements of the vast majority of industrial fields. Due to the fact that DY69 can provide two speed signals with a certain phase difference, forward and reverse discrimination can be performed. DY69 is easy to install, does not come into contact with the measuring gear, has no wear, and outputs a square wave waveform with a duty cycle of approximately 50%; Wide speed measurement range, wide temperature adaptability, strong vibration resistance, power polarity protection and output short circuit protection, in compliance with DIN867 standard.

2、 Characteristics

● High sensitivity; High reliability; Long lifespan; Long triggering distance

● Signal triggered by iron (soft) magnetic material

● Can achieve long-distance transportation

● Strong ability to resist electromagnetic interference

● Good impact resistance and earthquake resistance

3、 Working principle

● Principle of speed measurement

When the speed measuring gear rotates, the sensor will generate a frequencyf（Hz）= n×m/60(nFor the rotational speed,PNumber of teeth for gears)The square wave signal is used by the locomotive electronic control system to sample and detect the locomotive speed and diesel engine speed.

The sensing body must be a magnetic conductor, which can be a groove, a protruding screw, or a gear.

The application of this sensor to measure rotational speed involves the following parameters:

m- Number of sensing bodies on the tested rotational transducer magnet

n- Speed

f- Input signal frequency

S - Set instrument coefficient (depending on the characteristics of the speed measuring instrument, some speed measuring instruments directly set the number of teeth, please select the instrument coefficient according to the user manual of the selected speed measuring instrument)

The relationship is as follows:S=60/m

n = s  f = 60  f / m

After determining the number of sensors in a measurement system, the instrument setting coefficient is determined. The coefficient for each channel is determined based on the number of sensors in each channel.

For example, measuring the rotational speed of a rotating shaft with a30Toothed wheel, equivalent to sensing body teeth numberZ = 30So the frequency output by each channel of the sensor isf = (30/60)n,rotational speedn = 2fThe measured frequency should be multiplied by2It is equal to the actual rotational speed. Set the coefficient of the speed measuring instrument to2 That iss = 2Then the actual rotational speed of the rotor can be directly displayed. Similarly, if each revolution produces2If there is a signal, let the coefficient be sets = 30Okay, and so on for the rest.

● Principle of forward and reverse discrimination measurement

The application of Hall dual channel sensors can facilitate forward and reverse discrimination.

Install according to the application example in this manual. When the rotation direction is defined as forward rotation as shown in Figure 4, the output waveform is channel1Advanced channel2 90The schematic diagram of the degree and waveform is shown below:

picture1.1

When the rotation direction is consistent with Figure 4 When the direction is opposite, the channel2The waveform will lead the channel1wave form90The schematic diagram of the degree and waveform is shown below:

picture1.2

As shown in the above figure, for the channel1、2By phase discrimination of the waveform, forward and reverse discrimination can be performed.

1Sensor installation

● The tested sensor is a magnetic conductor with teeth or grooves on it.

Suggestion: Speed measuring gear Modulus ≥1.7The material is magnetic low carbon steel

Note: Non standard teeth or grooves with uneven width compared to flat surfaces will result in changes in the waveform width ratio.

● Installation gap:0.5-2mm,The typical value is1.0mm

Note: Depending on the vibration condition of the tested component

2Sensor output characteristics

● Frequency response characteristics:0~20kHz

● Number of output channels: dual channels

● Output waveform: square wave, rising and falling edge time 12μｓ±40%

● Output amplitude: High level:U-0.7（U: Power supply voltage), low level:< 0.1V

● Pulse duty cycle:50％±25％

● Phase difference: 90±30° (First channel ahead)

Note: Depending on the installation method and the direction of rotation of the rotating parts, this parameter is applicable to the installation method illustrated in Figure 4 of this manual

● Load capacity:20mA(Maximum)

● Output impedance: ＜47Ω

● Supply voltage:Ub＝+24VDC（5V～26V）

● Power consumption current: ≤35mA

● Working temperature: -40℃～+125℃

● Vibration resistance performance: vibration（10Hz~2KHz）30g, impact100g

● Sealing performance:IP68

● Power polarity protection: Yes

● Output short circuit protection: Yes

● Insulation strength:1000V 50Hz，1min(Channel and shell)

● Shell material: stainless steel304(Other materials can be used according to user requirements)

Figure 1 dimension

3External cables and connections

● External wires:6×0.5mm2shielded cable,The standard wire length is1.0Meter (can be extended according to user requirements)

● Definition of Sensor External Cable Output

1Wiring method

brown Power supply+24V

blackCOM

blueOUT

Purple;OUT

outer layer Shielding layer

Attention: The actual line standard shall prevail

2Sensor installation

Various installation speed measurement diagrams

Related instructions:

1）Gear size parameters: Gear outer diameter:99.3mmNumber of teeth:60Modulus:1.57 (The above dimensions are just one example, and the modulus is0.5to2Either way.)

2）When installing the sensor, make the connection between the tail and the root of the lead wire perpendicular to the gear plane.

3）The sensor leads are respectively: brown is the power cord;Black is the ground wire;Blue represents the signal output line.

4）If slotting, slotting size:Width ≥4mm;Depth ≥3mmThe opening size is ≥ Φ5mm.

3Installation, use, and troubleshooting

1）YDThe working power supply of the series Hall dual channel sensor is not allowed to be connected to the locomotive battery, and should be connected to the output of an isolated and stabilized power supply.

2）The output wires of the sensor are strictly wired according to the instructions and wiring definitions,Ensure correctness and absence of short circuits or open circuits. Strictly prohibit short circuits between pulse output and the positive terminal of the power supply.

3）Install the sensor according to the instructions and diagram, and adjust the gap between the gear and the sensor head to1mm,After adjusting the gap, tighten it.

4）Before installing the speed measurement end cover on the sensor, if there is a high or low change in the output level when the ferromagnetic piece contacts and leaves the head of the sensor, it is considered normal.

5）Under normal operation, the sensor output level remains unchanged(high or low)That is, the sensor is damaged.

6）The wire was damaged due to external force. The solution is to replace the sensor.

4Application examples

A certain speed measuring gear,60Teeth, feel the number2Apply Hall dual channel sensor as shown in the figure3.1During installation, the first channel of the sensor leads the second channel, with a phase difference of approximately90Degree.

Installation method one

If the gear count is not equal to2Rotate the sensor by a certain angle during installationrYou can also get about it90The phase difference of degrees is shown in the following figure3.2As shown. For specific matters, please call our company, and our professional staff will provide professional solutions based on your on-site situation.

If you use our company's sensors to batch match your products, we can also adjust the internal structure of the sensors according to your speed measurement gear module, number of teeth, and installation requirements, so that you can install them according to your actual usage situation and obtain approximate results90The waveform phase difference of degrees.

Installation method 2

DY69-A□□-B□□-C□□-D□□

Athread specification

01. M16×1；02.M18×1.5；03.Special customization

BShell length:

50.50mm；80.80mm；120.120mm；……

CLead method

00（K）.Direct lead wire（KRepresented by armor);01.Aviation plug

DCable length:

01.1m；02.2m；03.3m；……