Magnetic Passive Speed Sensor for Vehicle Wheel Turbo

• Customization: Available
• Mevs: Passive, Self-Generating
• Transport Package: Standard Export Package
• Model NO.: VS
• Specification: threaded mounted type
• Trademark: Yuanben
• Origin: China
• HS Code: 9026100000
• Production Capacity: 5, 000 Pieces/Year

Product Description

VS speed sensor user's manual

I.Overview:
The VS speed sensors produced by our company include three series:GVS series Hall type(internal and external magnet), MEVS series magnetoelectric type,.and MRVS magentoresistive gear speed sensors. The detection speed covers the entire speed range of 0-150,000 rpm.

1. GVS series gear speed sneosr are developed based on the principle that advanced magnetic hall elements re sensitive to changes in magnetic fields. The company has speed sensors taht can detect the speed of ferromagnetic gears or multi-pole magnets, as well as dual-channel speed sensors that can test the speed and direction of two channels isolated from each other. They are stable and reliable,have reliable signal ouput for high frequency and zero speed, do not lose step, have high detection accuracy, are small in size, and are easy to install and use.
2. MEVS magnetoelectric speed sensor does not require power supply. The change in magnetic gap caused by the rotation of the speed measuring gear generates an induced electromotive force in the probe coil. The amplitude is related to the speed. The higher the speed, the higher the ouput voltage. The ouput frequency is proportional to the speed. The coil adopts a special structure with enhanced anti-interference ability,which is widely used by users.
3. The magnetoresistive (MRVS) gear sensor is developed based on the principle that advanced magnetoresistive elements are sensitive to changes in magnetic in magnetic fields. When the position(teeth, slots) of the gear made of magnetic conductive material rotates, the MR magnetoresistive sensing element with a magnet(generating a magnetic field) can easily sense the change in the gear position to detect the speed. It is used for high-speed gear speed detection, such as PCB high-speed punching machine and computer flat knitting machine detection and control.

II. Model and specifications:

MEVS/GVS/MRVS Serial speed sensor
Main model	Type spectrum				Speed sensor characteristics
MEVS Magnetoelectric speed sensor
	A					Magnetoelectric speed sensor
		3				the distance between the sensor and the gear being measured,express in numbers(The unit is millimeters)
						signal output method
				M1245		standard shell code
					300	Switch lead length
					M8	M8 or M12 connectors
GVS Hall-effect speed sensor	I					Built-in magnetic field (the gear under test is steel)
	M					Non-built-in magnetic field(the gear being measured is a magnet)
		2				Maximum detection distance(mm) express in mumbers
			3P			Three wires PNP output method
			3N			Three wires NPN output method
			0			Square pulse output method
				M1640		Standard shell code
					12	Working Voltage VDC
MRVS Magnetoresistive speed sensor	A					Magnetoresistive speed sensor
		4				working gap(mm)
						standard driver number
						standard shelll number
						Leadwire length and output(PNP or NPN)

III. Product Features

1. None contact with the gear being tested, no wear, high reliablity, easy installation.
2. With polarity and short circuit protection functions,
3. and wide speed measurement range, wide frequency response (0-100kHz, can detect zero speed and high speed, standard square wave output signal.
4. Wide temperature adaptability range, strong shock resistance. Suitable for working in harsh enviroments such as high temperature.m, high humidity., water, oil, dust ,etc., with stable  performance.
5. Can detect the speed of continuously rotating gears and keyways.

Application fields
Widely used in speed detection and related position detection,gear and sprocket speed detection, shaft speed detection, and small object proximity detection. Due to its excellent reliability and wide operating temperature range, it can be widely used in textile machinery, transportation industry, metalluirgy, petroleum,chemical industry, aerospace, electromechanical and other industries.It can also be widely used in the new generation of intelligent engines as a speed sensor for ignition timing and used in ABS(anti-lock braking system) as a vehicle speed sensor.





Three series of speed sensor's structure comparison Schematic diagram.

MEVS  No power required	GVS-M
MRVS	GVS

IV.Speed sensor technical performance indicators





 

Item	Technical Parameter
Mode,l specificaiton	MEVS-	GVS-M-3-M1655	GVS-I-M1640
supply Voltage	Passive, self generating	5~24VDC	5~24VDC
Short Circuit	N/A	Yes	Yes
Signal output		Square pulse	Square pulse
Voltage output	13.4V(P-P)	400mV (max)	225mV
Current output	300mA	100mAmax	20mA
Output  resistance	1KOhm
Output  inductor	180mH
Speed measurement range	40~6000RPM	0~15000rpm	0~12000rpm
Response frequency	10kHz	100kHz	100kHz
Gear steering	forward or reverse no difference	forward or Reverse  no difference	forward or Reverse  no difference
Working gap	0.5~2.5mm	0.3~5	0.5~2.5mm
Insulation resistance	100MOhm	100MOhm	100MOhm
Shell number	M1250	M1655	M1640
Sensor installation direction	See the marking on the bottom mounting surface, the sensor axis is perpendicular to the rotation direction .
Cable	500mm	500mm	Shielded cable 500mm
Applicable	≤95%RH	≤95%RH	≤95%RH
Working temperature range	-40-125ºC	-20ºC~80ºC	-20ºC~125ºC
Protection grade	IP65	IP65	IP65
Material of gear under test	Mild steel	Multi-pole magnets	Mild steel
Measured object size (Typical gear sizes)	(Modulus)	(Modulus)	Diameter 20mm, thickness 6mm, tooth wideth 3mm,, valley width 3mm, valley depth 3mm(Modulus)
Remarks	φ2.2,φ3,φ5mm probes are available.		Working status indicator light optional

V. Standard shell number
 

Shell number	Apprearance	Installation Dimensions

1. Note: The above table lists the models of our company's existing products. Our company can design  and produce sensors of various specificaitons according to various specifications according to user's requirements on product size, output form,wire length,etc.

VI. Selection of speed sensor  
The specific type of sensor to be selected depends on the requirements of speed measurement. For example: whether low-speed messurement needs to detect zero speed, the maximum speed of high-speed measurement, and the device of speed generation. There are several types of speed generation devices:standard gears, using standard involute gears(M1~5) as speed generation signals, opening a keyway on the shaft, opening holes on the shaft, opening convex keys on the shaft, and other speed generation signal devices.The speed range of the magnetoelectric sensor test is further increased. When the speed is further increased, the magnetic circuit loss increases and the output potential has reached stauration. When the speed exceeds the limit, the magnetic circuit loss increases and the potential drops sharply.

1. MEVS magnetoelectricity speed sensor.

The magnetoelectric speed sensor adopts a permanent magnet structure,does not require power supply, has a simple structure, and has good reliablity, so it has been widely used. The magnetoelectric speed sensor is suitable for measuring speeds from above (60RPM) to medium speeds. Also it has very low requirements for the test object rotating shaft speed generator,test object gear modulus can be very small.The object to be measured can also be a very small hole, a small convex keyh. or a small groove. Select the probe accordinig to the hole and convex key, and use probes of φ2.2mm,φ3mm,φ5 mm,φ8 mm.

1. The GVS-M Hall Speed Sensor senses magnets. When magnets are embedded in the measured object, as the measured object rotates, the sensor ouputs a pulse signal related to the rotation frequency, achieving the purpose of speed measurement or displacement detection. Due to its easy installation and good versatility, it has been widely used in various fields. The speed measurement is 0-10Khz. The signal amplitude output by the sensor is relatively high(in the entire range of low speed and high speed).
2. Output waveform

The figure below is the output waveform of the speed sensor when detecting a gear or rack. The high level is greater than the power supply voltage(1V), and the low level is less than 1V. The high and low levels of the ouput correspond to the position of the gear or rack,the high level corresponds to the tooth top, and the low level corresponds to the tooth valley,the dual-channel type outputs dual-channel waveforms, the two phases differ by 90 degrees, and which one comes first and which one comes later is determined by the movement direction of the gear and rack.