1. Main components
1.1 Ultrasonic Detector (sensor)
Ultrasonic Detector (sensor) is made of lead zirconate titanate
(PZT), a piezoelectric ceramics that can cause mechanical
deformation in electric field. The piezoelectric PZT layer allows
the transformation of an AC voltage signal into vibration on a
certain frequency and vice versa. In plain words, once switched on,
the sensor sends continuous sound wave on a certain frequency. The
sound wave reflects when meeting obstacle. The echoes vibrate the
sensor and produce relevant voltage. 1.2 Microcomputer (Central
Microcomputer is the central processing unit of the UPRA
(Ultrasonic Parking & Reversing Aid) system. Every process of
the system is controlled by the microcomputer. Once switched on,
the microcomputer gives an instruction to send voltage to the
ultrasonic detector (sensor) on a certain frequency. Under such a
pressure, the detector vibrates and produces sound wave, which has
the same frequency with the sent voltage. The sound wave reflects
when meeting obstacle. Receiving the echoes, the detector sends the
signal back to the microcomputer. The microcomputer measures the
distance between the sensor and the obstacle based on the time
difference between the sent signal and the received one.
As we have more than one sensor in our UPRA system, we may send and
receive more than one signal. We decide that only the signal
reflected from the nearest obstacle be sent to the display panel.
What's more, QUANAN and ELE UPRA systems with anti-jamming
capability can safeguard the proper operation of radar in an
environment full of jamming signals.
1.3 Display Panel
Obstacle information detected by the sensor is sent to the
microcomputer. After processing, the microcomputer transmits a data
to the display panel, whose IC processes the data and sends it to a
digit display. The final result is shown digitally on the display
Meanwhile, on the display panel, we present three direction lamps
indicating different sensors from which the signal is sent.
The display panel is built in the rearview mirror, which means that
while reversing, the driver looks into the mirror and sees the
display at the same time.
2. Operating method
The key principle for this UPRA system is that of ultrasonic
echolocation. When a radar signal reaches an obstacle behind a
vehicle, it goes back to the sensor to be analyzed by the
microcomputer. After processing, the microcomputer works out the
distance and location of the obstacle, then sends the result to the
display panel. The display panel displays the result by three means
of warning: digit, light and sound. The warnings help the driver to
take prompt action before any costly damage can be done.
3.1 What are QUANAN and ELE UPRA systems?
QUANAN and ELE UPRA systems are vehicle distance measurement
systems which work under the principle of ultrasonic echolocation.
While in a moving vehicle, QUANAN and ELE UPRA systems installed
will automatically and instantly alert the driver to the presence
and distance to short-range obstacles near the vehicle, thus being
an aid to safe driving.
3.2 Why install QUANAN and ELE UPRA systems?
QUANAN and ELE UPRA systems are best examples of applying
technology to solving real problems.
Car rearview during backing has long been a trouble to drivers. The
accidents caused by poor rearview have taken up 30% of all the
traffic accidents. All drivers are anxious for a kind of device
that can tell the situation behind the vehicle during reversing.
QUANAN and ELE UPRA systems are hi-tech products integrating
ultrasonic, photoelectron and computer automated data processing
all in one. QUANAN and ELE UPRA systems solve the technical problem
of rearview blind zone in vehicle reversing. They provide visual
and acoustic warnings alerting the driver to the presence and
distance to short-range obstacles near the vehicle. The warnings
help the driver take prompt action before any costly damage can be
3.3 How QUANAN and ELE UPRA systems assist driving?
The system is automatically activated when you engage reverse gear.
Small sensors (ultrasonic detectors) fixed to the rear bumper
constantly send ultrasonic waves to rear of vehicle. If there are
obstacles within the set safety range, the sensors will receive
ultrasonic waves which bounce off obstacles and instantly send the
detection to the central control processor (microcomputer) which is
installed in the boot. Within 0.01 second, the microcomputer
finishes data processing and sends the result to the display panel
(or alarm) which alerts you to their presence.
To make the final result better understood, we provide three types
of warning: digit, light and sound. In addition, we set four sound
alarm frequencies according to different distance ranges:
1.55m-1.15m, 1.15m-0.75m, 0.75m-0.35m, and within 0.35m (British