CN204718634U - A kind of pick-up unit towards ultrasonic sensor and system - Google Patents

Abstract

The utility model embodiment discloses pick-up unit towards ultrasonic sensor and system, wherein device comprises: shell, piezoelectric chip, first standard transducer, the second standard transducer, the 3rd standard transducer, signal processing circuit, signal input line, output line and electrode wires, wherein: described piezoelectric chip is installed on described shell internal upper part; Described first standard transducer, described second standard transducer and described 3rd standard transducer have relay-type bandwidth, and are positioned over below described piezoelectric chip; Described signal processing circuit is electrically connected with described first standard transducer, described second standard transducer and described 3rd standard transducer respectively by described electrode wires; Described signal input line is connected with described piezoelectric chip; Described output line is connected with the output terminal of described signal processing circuit.The pick-up unit of the ultrasonic sensor in the utility model and system, realize simple for structure and universality strong, and the technical purpose that accuracy in detection is high.

Description

A detection device and system for ultrasonic sensors

technical field

The utility model relates to the technical field of sensor feedback, in particular to a detection device and system for ultrasonic sensors.

Background technique

With the advancement of science and technology and social development, ultrasonic sensors have many applications in medicine, military, industry, and agriculture. The performance of ultrasonic sensors is related to all aspects of production and life. Therefore, it is particularly critical to accurately and reliably detect the performance of ultrasonic sensors.

Existing detection equipment for ultrasonic sensors has technical problems of complex structure, low universality and low detection accuracy due to too narrow sampling frequency band.

Utility model content

In view of this, the utility model provides a detection device and system of an ultrasonic sensor to achieve the technical purpose of simple structure, strong universality, and high detection accuracy.

A detection device for ultrasonic sensors, comprising: a housing, a piezoelectric chip, a first standard sensor, a second standard sensor, a third standard sensor, a signal processing circuit, a signal input line, a signal output line and an electrode line, wherein:

The piezoelectric chip is installed on the inner upper part of the housing;

The first standard sensor, the second standard sensor and the third standard sensor have a relay-type frequency bandwidth and are placed under the piezoelectric wafer;

The signal processing circuit is electrically connected to the first standard sensor, the second standard sensor and the third standard sensor through the electrode wires;

The signal input line is electrically connected to the piezoelectric chip;

The signal output line is connected to the output end of the signal processing circuit.

Preferably, the side wall of the housing is filled with sound-absorbing material.

Preferably, the detection device further includes an aluminum plate, and the aluminum plate supports the first standard sensor, the second standard sensor and the third standard sensor.

Preferably, the detection device further includes a copper column, and the copper column supports the signal processing circuit.

Preferably, the first standard sensor is a standard sensor with a frequency band of 20-100K.

Preferably, the second standard sensor is a standard sensor with a frequency band of 100-300K.

Preferably, the third standard sensor is a standard sensor with a frequency band of 300-500K.

The utility model also discloses a detection system for ultrasonic sensors, including:

The ultrasonic sensor to be tested, the host and the above-mentioned detection device facing the ultrasonic sensor, the ultrasonic sensor to be tested is installed above the piezoelectric wafer, and the host is connected to the output end of the signal processing circuit through the signal output line.

As can be seen from the above technical solutions, the detection device and system for ultrasonic sensors in the embodiment of the utility model are provided with three standard sensors with different bandwidths, and the three standard sensors are designed in a relay-type manner in the frequency bandwidth to ensure Covers the frequency bandwidth of most standard ultrasonic sensors. At the same time, the three standard sensors connect the measured ultrasonic signals to the signal processing circuit for processing, and then use the signal output line to upload to the host, so that the ultrasonic sensor to be tested and the host form a feedback loop. , which greatly improves the measurement accuracy. Therefore, the ultrasonic sensor-oriented detection device and system have simple structure, strong universality and high detection accuracy.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Apparently, the drawings in the following description are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative work.

Fig. 1 is a schematic structural diagram of a detection device of an ultrasonic sensor disclosed in an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of the detection system of the ultrasonic sensor disclosed in the embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The utility model provides a detection device and system of an ultrasonic sensor to achieve the technical purpose of simple structure, strong universality and high detection accuracy.

Figure 1 shows a detection device for ultrasonic sensors, including:

Shell 10, piezoelectric wafer 1, the first standard sensor 21, the second standard sensor 22, the third standard sensor 23, signal processing circuit 3, signal input line 8, signal output line 9 and electrode line 6 (shown in Fig. 1 one of them), in which:

The piezoelectric chip 1 is mounted on the inner upper part of the housing 10;

The first standard sensor 21, the second standard sensor 22 and the third standard sensor 23 have a relay-type frequency bandwidth, and are placed below the piezoelectric wafer 1; the above-mentioned three standard sensors have a frequency bandwidth of The relay design ensures that the frequency bandwidth of most ultrasonic sensors is covered and the detection accuracy is improved.

Preferably, the first standard sensor is a standard sensor with a frequency band of 20-100K. The second standard sensor is a standard sensor with a frequency band of 100-300K. The third standard sensor is a standard sensor with a frequency band of 300-500K. The above-mentioned frequency bandwidth is a preferred implementation form and is not limited.

The signal processing circuit 3 is electrically connected to the first standard sensor 21, the second standard sensor 22 and the third standard sensor 23 respectively through the electrode wires 6;

The signal input line 8 is electrically connected to the piezoelectric wafer 1; the signal source will send a signal to the piezoelectric wafer 1 through the signal input 9 for detecting the standard of the current sensor.

The signal output line 9 is connected to the output end of the signal processing circuit 3 .

The signal output line 9 transmits the signal of the standard sensor to the host, and the host and the sensor to be tested form a feedback loop.

The side wall of the housing 10 is filled with sound-absorbing material 5 . The sound-absorbing material is set to reduce noise interference and improve detection accuracy.

Also shown in FIG. 1 is an aluminum plate 4 supporting the first standard sensor 21 , the second standard sensor 22 and the third standard sensor 23 .

It is also shown in FIG. 1 that the detection device further includes a copper column 7 , and the copper column 7 supports the signal processing circuit 3 . The copper pillars can prevent the signal processing circuit 3 from being connected to the casing.

Figure 2 shows a detection system for ultrasonic sensors, including:

Ultrasonic sensor to be measured 11, main frame 12 and above-mentioned detection device facing the ultrasonic sensor, described ultrasonic sensor to be measured 11 is installed on the top of described piezoelectric wafer 1, and described main frame 12 communicates with described signal processing through described signal output line 9 The output of circuit 3 is connected. The signal output line 9 transmits the processed signal of the standard sensor to the host, and the host 12 and the sensor to be tested 11 form a feedback loop, which can be adjusted and monitored accurately.

The structure and working principle of the ultrasonic sensor-oriented detection device refer to the diagram in FIG. 1 and its corresponding description, and will not be repeated here.

In summary:

The ultrasonic sensor-oriented detection device and system of the embodiment of the utility model are provided with three standard sensors with different bandwidths, and the three standard sensors are designed in a relay manner on the frequency bandwidth to ensure that the frequency bandwidth of most standard ultrasonic sensors is covered. , at the same time, after the three standard sensors connect the measured ultrasonic signals to the signal processing circuit for processing, the signal output line is used to upload to the host, so that the ultrasonic sensor to be tested and the host form a feedback loop, which greatly improves the measurement accuracy Spend. Therefore, the ultrasonic sensor-oriented detection device and system have simple structure, strong universality and high detection accuracy.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be used in other embodiments without departing from the spirit or scope of the embodiments of the present invention. accomplish. Therefore, the embodiments of the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A detection device facing an ultrasonic sensor, it is characterized in that comprising: a housing, a piezoelectric chip, a first standard sensor, a second standard sensor, a third standard sensor, a signal processing circuit, a signal input line, a signal output line and Electrode wires, where: The piezoelectric chip is installed on the inner upper part of the shell; The first standard sensor, the second standard sensor and the third standard sensor have a relay-type frequency bandwidth and are placed under the piezoelectric wafer; The signal processing circuit is electrically connected to the first standard sensor, the second standard sensor and the third standard sensor through the electrode wires; The signal input line is electrically connected to the piezoelectric chip; The signal output line is connected to the output end of the signal processing circuit. 2. The detection device facing the ultrasonic sensor according to claim 1, characterized in that, the side wall of the housing is filled with sound-absorbing material. 3 . The detection device for ultrasonic sensors according to claim 1 , further comprising an aluminum plate, the aluminum plate supporting the first standard sensor, the second standard sensor and the third standard sensor. 4 . 4 . The detection device for ultrasonic sensors according to claim 1 , further comprising a copper pillar supporting the signal processing circuit. 5 . The detection device for ultrasonic sensors according to claim 1 , wherein the first standard sensor is a standard sensor with a frequency band of 20-100K. 6 . The detection device for ultrasonic sensors according to claim 1 , wherein the second standard sensor is a standard sensor with a frequency band of 100-300K. 7. The detection device for ultrasonic sensors according to claim 1, wherein the third standard sensor is a standard sensor with a frequency band of 300-500K. 8. A detection system facing an ultrasonic sensor, characterized in that it comprises: an ultrasonic sensor to be measured, a host computer and the detection device facing an ultrasonic sensor according to any one of claims 1-7, the ultrasonic sensor to be measured is installed on Above the piezoelectric wafer, the host is connected to the output end of the signal processing circuit through the signal output line.