JPS6173040A - Shock detection sensor - Google Patents

Abstract

PURPOSE:To utilize the shock detection sensor for a movable type window, door, etc., by providing a power-saving circuit which operates only when a shock signal is above a specific level and transmitting a signal by an ultrasonic wave system, etc. CONSTITUTION:The shock detection sensor EP is made of piezoelectric ceramic and its signal is inputted to a detection part mechanism D through a filter F. Its output is inputted to a power-saving mechanism SE which operates only when the signal is above the specific level, and the output of the mechanism is inputted to an electric transmitting mechanism T, e.g. ultrasonic wave system, infrared-ray system, radio-wave system, wireless system, etc., so that the mechanism TE generates and transmits a signal from a transmitter TR. Further, a power source PS such as a battery is connected to this circuit. Then, the power- saving mechanism SE saves the electric power of the power source PS. Therefore, a power-saving shock detection sensor is obtained and the signal is transmitted on wireless basis, so this sensor is usable for movable equipment such as the window, etc., of an automobile.

Description

[Detailed description of the invention] The present invention relates to an impact detection system.

The main applications of iii.9 detection sensors include the management of industrial equipment, parked cars, windows of houses, etc.

For equipment with a rotating system such as motorized equipment, industrial equipment, such as electric Jas, ℃ detects the initial abnormal sound of the rotating part, that is, the Rayok signal generated from the abnormality of the hair ring ball, and detects seizure of the rotating part. In order to prevent this, an impact detection sensor is installed near the rotating system.

On the other hand, in the case of the latter, targeting cars or houses, in order to break into illegally parked cars or houses, break the window glass, unlock the door, and open the window. Most people enter from the part that was directly destroyed.

In this case, by installing an impact detection sensor on the glass, the impact detection sensor will sense the impact signal just before the intruder breaks into the window, that is, at the time the intruder applies an impact to the glass to break it. Then, the code is transmitted to the next device.

The security guard who receives this signal will immediately be dispatched and take appropriate measures against the theft.

The impact detection sensor of the present invention, which is suitable for these uses, is characterized in that it is not a wired type.

The details will be explained below with additional drawings.

Among the previous examples, the method of attaching a conventional wired impact detection sensor to the window glass of buildings such as houses that are frequently used is as shown in Figures 1a and 1b, whose plan view and cross-sectional view are respectively shown. The impact detection sensor 14 is attached to one side of the glass fitted inside the fixed frame, and is equipped with a wire 13 for supplying power and transmitting the generated signal to the next system. As shown in Figure 2a, there is a vibration pickup element E made of piezoelectric ceramic, a filter mechanism F with an amplifier that amplifies and sorts the signals, a mechanism that detects and processes the sorted signals, and a mechanism that detects and processes the sorted signals. It consisted of 1aW for transmission.

However, strictly speaking, the above-mentioned transmission line W also has the function of supplying power to the impact detection sensor.

Conventional wired impact detection sensors have a gland W attached to them, so they have to target only fixed objects to be detected. It had a serious defect that made it impossible to use it as an impact detection sensor for glass.

As a result of various studies regarding this point, as shown in Fig. 2, the conventional vibration pickup element E, filter F, and its signal processing mechanism have a power saving mechanism S8. Added electric transmitter mechanism Tt, electric fips and transmitter T for wireless transmission.

First, in order to substitute the electric power supplied by the line W with a storage battery, an element E is installed, and only when the generated signal is a predetermined signal, in order to operate the mechanism after the transmission which requires a large amount of electric power. Equipped with a power-saving mechanism S, and for transmission, an infrared method that does not require wires, or an ultrasonic method,
Furthermore, in order to utilize the IE wave system, infrared generating diodes, ultrasonic transducers, antenna wires, etc. were applied to each system.

As a result, the present invention can be expected to be used in a wide range of fields, such as movable windows and two doors, which could not be applied conventionally, and is industrially valuable.

[Brief explanation of the drawing]

Figures 1a and 1b show a side view and a cross-sectional view of an example of mounting a conventional wired impact detection sensor, respectively, where 11 is a frame, 12 is glass, 13 is a wire, and 14 is an impact sensor. Each detection sensor is shown. FIG. 2 a is a diagram showing the electrical circuit configuration of a conventional shock detection sensor, and FIG. 2 b is a diagram showing the electrical circuit configuration of a shock detection sensor according to the present invention.
The detection mechanism S is an it-saving structure, and Tw is an electrical transmission mechanism. Ps is a power supply, and T- is a transmitter.

Claims (1)

[Claims] The device is characterized by being equipped with a power-saving circuit and transmitting the signal generated from the impact object to the next system by wireless method such as ultrasonic method, infrared method, or radio wave method. impact detection sensor.